EP0451806A1 - Press tool - Google Patents

Press tool Download PDF

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Publication number
EP0451806A1
EP0451806A1 EP91105662A EP91105662A EP0451806A1 EP 0451806 A1 EP0451806 A1 EP 0451806A1 EP 91105662 A EP91105662 A EP 91105662A EP 91105662 A EP91105662 A EP 91105662A EP 0451806 A1 EP0451806 A1 EP 0451806A1
Authority
EP
European Patent Office
Prior art keywords
press
jaws
pressing
tool according
abutment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91105662A
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German (de)
French (fr)
Other versions
EP0451806B1 (en
Inventor
Helmut Dipl.-Ing. Dischler
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Individual
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Individual
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Publication date
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Application filed by Individual filed Critical Individual
Priority to EP94110654A priority Critical patent/EP0627273B1/en
Priority to EP94110655A priority patent/EP0628362B1/en
Publication of EP0451806A1 publication Critical patent/EP0451806A1/en
Application granted granted Critical
Publication of EP0451806B1 publication Critical patent/EP0451806B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • B21D39/046—Connecting tubes to tube-like fittings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/10—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting fittings into hoses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/146—Clip clamping hand tools
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/5367—Coupling to conduit

Definitions

  • the invention relates to a pressing tool, in particular for connecting tubular workpieces, with more than two arcuate pressing jaws which are movable relative to one another in such a way that they can be opened for placement on the workpiece and that they complement one another towards the end of the pressing to form a closed pressing space, and with at least one drive device for moving pressing jaws in the pressing direction.
  • Coupling sleeves are used to connect pipe ends, which are plastically deformable and made of metal, preferably steel. Their inner diameter is so much larger than the outer diameter of the pipe ends to be connected that they are permanently deformed in the event of radial compression until they abut the outer surface of the pipe ends. According to DE-PS 1 187 870 ⁇ , such coupling sleeves can additionally have an annular groove on the inside near each end, into which an elastic sealing ring is inserted.
  • the radial compression takes place by means of pressing tools, as are known for example from DE-PS 21 36 782.
  • This pressing tool has two clamping arms, each with two arms, at least one of which is pivotably mounted on the pressing tool.
  • the press jaws have press surfaces which form circular arc sections and have the same radii and enclose a press chamber.
  • the pressing surfaces can also be contoured instead of as circular arc sections be, for example, to form a polygonal or oval press room.
  • the arms of the press jaws which are distant from the press chamber can be spread against the action of a spring, with the result that the press jaws are moved against one another in the region of the press chamber.
  • the spreading takes place by means of pressure rollers which are arranged next to one another and lie against one another and which are moved together between the arms by means of a drive device in the form of a working cylinder and in this way pivot the press jaws.
  • the clamping jaws When pivoting the drive lever in the opposite direction, the clamping jaws are pivoted again so that the perpendicular to their arc sections approximately collapse and the clamping jaws are moved parallel to each other when the drive lever is pivoted further. During the pressing process, the clamping jaws are moved further towards each other until they enclose a circular area at the end of the press and thereby the pipe ends or the coupling sleeve have deformed accordingly while reducing the diameter.
  • This press tool has proven itself when a not too large reduction in diameter or press-in depth is required. For larger press-in depths, which are required if the pipe connection is to withstand higher internal pressures, it is necessary to provide more than two press jaws so that there is no formation of outwardly projecting webs between the end faces of the press jaws, which leads to a complete closing of the press jaws would prevent.
  • Such pressing tools are described for example in DE-OS 21 18 782, DE-OS 35 13 129, DE-AS 25 11 942 and DE-AS 19 0 197 956. All the pressing tools disclosed therein have in common that all pressing jaws are movable and guided in the radial direction. This requires complex guides and drive devices, making the pressing tools difficult and therefore difficult to handle and also expensive.
  • the invention is therefore based on the object of designing a press tool of the type mentioned in such a way that, despite the arrangement of more than two press jaws, it is as simple as possible and thus easy to handle and can be produced inexpensively.
  • one of the press jaws is designed as an abutment that can be attached to the workpiece and the other press jaws are movable by means of the drive device (s) and are guided in such a way that they each move towards the center during the pressing process move the press room in the closed state of the press tool. It is expedient if the press jaws are guided such that they can move relative to one another in such a way that their respective opposite end faces have the same spacing at the start of the press.
  • the pressing tool according to the invention is characterized by simple structure, since one of the press jaws is designed as an abutment and thus requires neither a guide nor a drive device.
  • the remaining press jaws are guided and driven so that they move in very specific directions during the pressing process, specifically towards the center of the pressing chamber in the closed state of the pressing tool. This is very important for the same forces acting on the workpiece from all sides.
  • the press jaws have circular arc sections of equal length in the circumferential direction, that is to say the gaps between the respective opposite end faces of the press jaws are distributed uniformly over the circumference.
  • the directions of movement of the two movable press jaws should include an angle of 60 °, which is symmetrical to the perpendicular to the abutment and opens away from it.
  • the directions of movement of the two press jaws adjacent to the abutment should include an angle of 90 ° during the pressing process, which lies symmetrically to the perpendicular to the abutment and opens away from it.
  • the abutment is designed as an abutment bracket located at the free end of the pressing tool, which is pivotably mounted on one side and which can be released or locked on the opposite side.
  • This abutment bracket can be pivoted away when the pressing tool is attached to the pipe ends to be connected or to the coupling sleeve. After swiveling back and locking, the movable press jaws can then be moved in the direction of the abutment by means of the drive device.
  • the movable press jaws on the one hand rest against their guide directions and on the other hand on a movable press die in the direction of the abutment, which is connected to the drive device (s) and on which the press jaws adjacent to the abutment are slidably mounted.
  • the press ram is part of the drive device and can be designed, for example, as a hydraulic cylinder or connected to one.
  • a separate drive device can also be provided for each movable press jaw, for example, again a hydraulic cylinder. This can have a press or tension stamp.
  • the abutment is part of a press with press jaws connected in an articulated manner, which is open between two press jaws, the press ring being closable by means of the drive device (s).
  • the drive device (s) can engage at the free ends of the press ring.
  • This embodiment opens up the possibility that the drive device (s) is or are separate from the press ring and the drive device (s) and the press ring have coupling elements, by means of which they can be brought into operative connection with one another.
  • the pressing tool is thus formed in two parts, the pressing ring first being placed around the workpiece and the pressing jaw serving as an abutment being brought into contact, and then the pressing tool being attached to the pressing ring.
  • This embodiment is very advantageous in its handling, since the individual parts have a significantly lower weight and can be handled independently of one another.
  • the press ring can have at least one tension band lying on the outside against at least the movable press jaws, by means of which the pressure jaws can be moved together, wherein two tension bands can also be provided for this purpose.
  • This version is particularly weight and cost-saving.
  • the free ends of the recess (3) are connected by an abutment bracket (4).
  • the abutment bracket (4) is pivotally mounted on its right side in this view about a bearing pin (5). On the left side in this view, the abutment bracket (4) is fixed in the position shown via a locking pin (6).
  • This locking pin (6) passes through corresponding recesses in the tool housing (2) and in the abutment (4) and can be easily removed. After its removal, the abutment bracket (4) can be pivoted around the bearing pin (5) in the directions of the double arrow A, clockwise until the recess (3) is up is fully open.
  • the abutment bracket (4) has a pressing surface (7) which has the shape of a circular arc and extends over an angle of 120 ° symmetrically to the longitudinal axis of the pressing tool (1).
  • the pressing surface (7) has a groove which runs in the circumferential direction and is open inwards. It can be exchangeably attached to the abutment bracket (4).
  • Sloping guide surfaces (8, 9) which enclose an angle of 60 ° and run mirror-symmetrically to the longitudinal axis of the pressing tool (1), run inside the tool housing (2).
  • One press jaw (10 8, 11) each lies on the guide surfaces (8, 9), specifically via correspondingly inclined contact surfaces (12, 13).
  • the pressing jaws (10 ⁇ , 11) are also mirror-symmetrical to the longitudinal axis of the pressing tool (1) and each have a pressing surface (14, 15), each of which is designed as a circular arc section extending over 120 °.
  • a circumferential groove is also formed on the inside.
  • the circular arc sections of all pressing surfaces (7, 14, 15) have identical radii.
  • the pressing jaws (10 ⁇ , 11) protrude on the underside into a guide groove (16) which runs horizontally and transversely to the longitudinal axis of the pressing tool (1) and is formed in the head (17) of a pressing die (18).
  • the undersides of the pressing jaws (10 ⁇ , 11) also run horizontally, so that the pressing jaws (10 ⁇ , 11) are guided in the groove (16) displaceably in the groove (16) transversely to the longitudinal axis of the pressing tool (1), in accordance with Art a dovetail guide.
  • transverse blind holes (19, 20 ⁇ ) are formed, which are coaxial to each other.
  • a compression spring (21) is used, which endeavors to press the press jaws (10 ⁇ , 11) outwards and thus over the contact surfaces (12, 13) to the guide surfaces (8, 9).
  • the press ram (18) is mounted vertically linearly movable in the direction of the longitudinal axis of the pressing tool (1) (double arrow B). It is actuated by a pneumatically or hydraulically actuated working cylinder, which is not shown here.
  • the locking of the abutment bracket (4) is first released using the locking bolt (6), i.e. this locking pin (6) is pulled out and the abutment bracket (4) swiveled clockwise until the fork-shaped opening of the recess (3) is completely free.
  • the press ram (18) is in a downwardly retracted position.
  • the pressing tool (1) can then be attached to a coupling sleeve (22) such that the coupling sleeve (22) extends through the recess (3) perpendicular to the plane of the drawing and is received by the latter.
  • the abutment (4) is pivoted back around the coupling sleeve (22) and locked by inserting the locking bolt (6).
  • the coupling sleeve (22) is then enclosed by the pressing tool (1).
  • the press jaws (10 ⁇ , 11) are then brought into contact with the coupling sleeve (23) by raising the press ram (18). Since their radius is smaller by the intended insertion depth than the radius of the coupling sleeve (22) before pressing, the pressing surfaces (7, 14, 15) only lie with their outer transverse edges on the circumference of the coupling sleeve (22). Between the end faces of the Press jaws (10 ⁇ , 11) and the abutment bracket (4) are still free gaps (23, 24, 25), which are the same size.
  • the radii of the circular arc sections of the pressing surfaces (7, 14, 15) start from centers which lie in the tips of an equilateral triangle.
  • the press ram (18) is then moved upward by further pressurization.
  • the press jaws (10 ⁇ , 11) slide over their contact surfaces (12, 13) over the guide surfaces (8, 9), which means that one in the directions of the double arrows C, D running direction of movement is impressed.
  • the two directions of movement enclose the same angle as the guide surfaces (8, 9), ie 60 °.
  • the press jaws (10 ⁇ , 11) slide simultaneously in the groove (16) of the press ram (18) towards each other, against the action of the compression spring (21). In this way, the coupling sleeve (22) is radially compressed, ie its diameter is reduced by the desired press-in depth.
  • a circular press space is enclosed by the press surfaces (7, 14, 15) and the gaps (23, 24, 25) have been reduced to zero.
  • the press ram (18) is moved back again.
  • the abutment bracket (4) is pivoted away after removing the locking bolt (6) so that the pressing tool (1) can then be removed.
  • a pressing tool (31) is also only partially shown, namely the head area.
  • the pressing tool (31) has a tool housing (32) which is hollow on the inside and which extends downwards for receiving a drive and for the purpose of handling, which is not shown here.
  • Two drive levers (34, 35) are mounted in the tool housing (32) as a mirror image of the longitudinal axis (33) so that they can rotate about pivot bolts (36, 37) extending perpendicular to the plane of the drawing.
  • the downward-pointing arms (38, 39) of the drive lever (34, 35) are spread for pivoting in the directions of the arrows E, F, against the action of a spring (not shown here) which contracts the arms (38, 39) .
  • a pair of pressure rollers is used to spread the arms (38, 39), which can be moved into the space between the arms (38, 39) with the aid of a pneumatically or hydraulically actuated working cylinder.
  • a such drive device is known per se from DE-PS 21 36 782 and DE-OS 34 23 382.
  • Press jaws (42, 43) are received in the arms (40 ⁇ , 41) of the drive lever (34, 35) which extend upwards from the pivot bolts (36, 37).
  • the pressing jaws (42, 43) each have inside pressing surfaces (44, 45) which each form circular arc sections extending over 120 °.
  • Both press jaws (42, 43) are movably mounted on the arms (40 ⁇ , 41) of the drive lever (34, 35) in the circumferential directions according to double arrows G, H. For this purpose, they lie with their outer sides on corresponding circular-arc-shaped guide surfaces (46, 47) in the arms (40 ⁇ , 41), which run coaxially to the circular arc sections of the respective pressing surfaces (44, 45).
  • the press jaws (42, 43) have lugs (48, 49) projecting laterally outwards, on both sides of the guide surfaces (46, 47).
  • the lugs (48, 49) carry guide projections (50 ⁇ , 51) which form-fit into the scenes (52, 53) which are molded into the inside of the tool housing (32). In this way, the pressing jaws (42, 43) are positively guided in the circumferential directions G, H when the drive lever (34, 35) pivots.
  • Another press jaw is formed by an abutment (54) which is arranged in a stationary manner within the tool housing (32) and has a pressing surface (55) on the top, which is designed as a circular arc section extending over 120 °.
  • the circular arc section has the same radius as that of the other pressing surfaces (44, 45).
  • the arms (38, 39) of the drive lever (34, 35) are first pressed together by hand, that is, contrary to the arrows E, F.
  • the arms (40 ⁇ , 41) mouth-like and give a space between the end faces of the press jaws (42, 43) so that the press tool (31) can be pushed across a coupling sleeve (56) transversely to its longitudinal axis.
  • the pressing jaws (42, 43) can be closed. This is done by spreading the lower arms (38, 39) of the drive lever (34, 35) with the help of the drive device, not shown.
  • the press jaws (42, 43) then come to rest on the jacket of the coupling sleeve (56). Since the radii of the pressing surfaces (44, 45, 55) are smaller than the radius of the coupling sleeve (56) before the pressing by the intended insertion depth, the pressing surfaces (44, 45, 55) lie only with their outer transverse edges on the circumference of the coupling sleeve (56).
  • the scenes (52, 53) are shaped such that the pressing jaws (42, 43) in the circumferential direction relative to the arms (40 ⁇ , 41) of the drive lever (34, 45) are shifted accordingly, ie the left press jaw (42) clockwise and the right press jaw (43) counterclockwise.
  • the radii of the circular arc sections of the pressing surfaces (44, 45, 55) start from centers which lie in the tips of an equilateral triangle.
  • the lower arms (38, 39) of the drive lever (34, 35) are additionally spread.
  • the pressing jaws (42, 43) are moved further inwards, the two directions of movement essentially enclosing an angle of 60 °, which is symmetrical to the longitudinal axis (33) and opens away from the abutment (54).
  • the pivot pins (36, 37) each lie on straight lines which start from the center point of the circular arc section of the abutment (54) and form an angle which is twice as large as that of the directions of movement of the press jaws (42, 43) included angles, namely 120 °.
  • the scenes (52, 53) bend afterwards downwards in such a way that the pressing jaws (42, 43) are displaced in the circumferential direction relative to the arms (40 ⁇ , 41), namely the left pressing jaw (42) counterclockwise and the right pressing jaw (43) clockwise.
  • the guide in the scenes (52, 53) is such that the gaps (57, 58, 59) remain the same throughout the pressing process until the end faces of the press jaws (42, 43) and the abutment (54) at the end of the press Plant come.
  • the coupling sleeve (56) is compressed radially and its diameter is reduced by the desired press-in depth.
  • the lower arms (38, 39) of the drive lever (34, 35) are pushed together again, so that the upper arms (40 ⁇ , 41) open like a mouth.
  • the pressing tool (31) can then be removed from the coupling sleeve (56).
  • a pressing tool (61) - also only partially - is shown, this pressing tool (61) being very similar to the pressing tool (31) shown in Figures (3) and (4). It has an internally hollow tool housing (62) which extends downwards for receiving a drive and for the purpose of handling, which is not shown here.
  • Two drive levers (64, 65) are mounted in the tool housing (62) as a mirror image of the longitudinal axis (63) so that they can rotate about pivot bolts (66, 67) extending perpendicular to the plane of the drawing.
  • the downward-pointing arms (68, 69) of the drive levers (64, 65) are spread for pivoting in the directions of arrows I, J, against the action of a lower arm, not shown here (68, 69) contracting spring.
  • a pair of pressure rollers is used to spread the arms (68, 69), as has already been described for the pressing tool (31) in FIGS. (3) and (4).
  • Press jaws (72, 73) are received in the arms (70 ⁇ , 71) of the drive levers (64, 65) which extend upwards from the pivot bolts (66, 67). They each have inside pressing surfaces (74, 75) which each form circular sections extending over 120 °. Both press jaws (72, 73) are movably mounted on the upper arms (70 ⁇ , 71) of the drive lever (64, 65) in the circumferential directions according to the double arrows K, L. For this purpose, you lie with your outer sides on corresponding, circular arc-shaped guide surfaces (76, 77) in the arms (70 ⁇ , 71), which run coaxially to the circular arc sections of the respective pressing surfaces (74, 75).
  • the pressing jaws (72, 73) have notches (78, 79) on their outer circumferences, into which pins (80 ⁇ , 81) which are axially displaceably mounted in the upper arms (70 ⁇ , 71). These pins (80 ⁇ , 81) are spring-loaded via compression springs (82, 83) in the direction of the notches (78, 79).
  • the pins (80 ⁇ , 81) and the notches (78, 79) are arranged so that the pins (80 ⁇ , 81) strive to move the press jaws (72, 73) against each other in the circumferential direction, i.e. the left press jaw (74 ) clockwise and the right press jaw (73) counterclockwise.
  • Stops not shown here ensure that the press jaws (72, 73) cannot be moved beyond these to a certain maximum extent in these two directions.
  • the guidance of the press jaws (72, 73) is such that they do not fall inwards from the receptacles of the arms (70 ⁇ , 71), i.e. a corresponding forced operation is provided.
  • Another press jaw is formed by an abutment (84) which is arranged in a stationary manner within the tool housing (62) and on the top side has a pressing surface (85) which is designed as a circular arc section extending over 120 °.
  • the circular arc section has the same radius as that of the other pressing surfaces (74, 75).
  • the lower arms (68, 69) of the drive lever (64, 65) are first pressed together by hand, that is, contrary to the arrows I, J. This opens the upper arms (70 ⁇ , 71) mouth-like and give space between the end faces of the press jaws (72, 73) so that the press tool (61) can be pushed transversely to its longitudinal axis via a coupling sleeve (86). After the coupling sleeve (86) has been placed on the pressing surface (85) of the abutment (84), the pressing jaws (72, 73) can be closed by spreading the lower arms (68, 69) with the aid of the drive device (not shown here).
  • the press jaws (72, 73) then come to rest on the jacket of the coupling sleeve (86). Since the radii of the pressing surfaces (74, 75, 85) are smaller than the radius of the coupling sleeve (86) before the pressing by the intended insertion depth, the pressing surfaces (74, 75, 85) lie only with their outer transverse edges on the circumference of the coupling sleeve (86).
  • the stops for limiting the movement of the pressing jaws (72, 73) are arranged correspondingly in the circumferential direction.
  • the radii of the circular arc sections of the pressing surfaces (74, 75, 85) start from centers which lie in the tips of an equilateral triangle.
  • the pressing jaws (72, 73) move automatically in the circumferential direction relative to the upper arms (70 ⁇ , 71), namely the left pressing jaw (72) counterclockwise and the right pressing jaw (73) clockwise. It has been shown that the gaps (87, 88, 89) remain essentially the same in this embodiment despite the inaccurate guidance during the entire pressing process until the end faces of the pressing jaws (72, 73) and the abutment (84) on Press end come to rest, as can be seen in Figure (6).
  • the coupling sleeve (86) is compressed radially and its diameter is reduced by the desired press-in depth.
  • pressing tools (91, 92) are shown, each in half.
  • the pressing tool (91) is shown on the left half of the figures (7) and (8) with respect to the axis of symmetry and the pressing tool (92) is shown on the right half.
  • Both pressing tools (91, 92) are mirror-symmetrical, so that their structure results from the representation of their halves.
  • the pressing tool (91) shown in the left halves of the figures (7) and (8) has a pressing ring (93) which consists of a total of three pressing jaws (94, 95), the pressing jaw (94) only because of the half-sided representation partially and a press jaw - namely the right one - cannot be seen at all.
  • a flexible drawstring (97) made of spring steel is fastened to the upper press jaw (94) by means of a screw (96) and extends over the circumference of the upper press jaw (94). and the left press jaw (95) extends.
  • a corresponding tension band runs to the other side of the press ring (93), not shown here.
  • the lower press jaws (95) are displaceable in the circumferential direction K on the tension bands (97).
  • a rubber spring (98) surrounds in recesses in the opposite end faces of the press jaws (94, 95) and is vulcanized onto them.
  • the press jaws (94, 95) are pushed apart by the rubber springs (98) by a certain amount, so that there are gaps (99, 10 ⁇ 0 ⁇ ) of the same width between the opposite end faces of the press jaws (94, 95) when the press jaws (94, 95) rest on the outside on a coupling sleeve (10 ⁇ 1).
  • Coupling lugs (10b or2) are attached to the outside of the free ends of the drawstrings (97).
  • a drive device (10 ⁇ 3) which is only shown schematically and in broken lines here, can be attached to these coupling attachments (10 ⁇ 2) and is separated from the press ring (93).
  • the pressing tool (91) thus consists of two independent parts that can be coupled together.
  • the drive device (10 ⁇ 3) has two drive levers (10 ⁇ 4), of which only the left one can be seen here. They are rotatably mounted about pivot bolts (10 ⁇ 5) extending perpendicular to the plane of the drawing. Your downward-pointing arms (10 ⁇ 6) are spread for pivoting in the direction of arrow L, against the action of a spring, not shown here, which contracts the lower arms (10 ⁇ 6). A pair of pressure rollers is used to spread the arms (10 ⁇ 6), as has already been described for the pressing tool (31) in Figures (3) and (4).
  • the arms (10 ⁇ 7) extending upwards from the pivot bolts (10 ⁇ 5) are shaped in such a way that they can reach behind the coupling projections (10 ⁇ 2).
  • the pressing ring (93) When using the pressing tool (91), the pressing ring (93) is first opened, so that the lower pressing jaws (95) protrude outwards, as shown in broken lines. The press ring (93) can then be pushed across the combination of coupling sleeve (10 ⁇ 1) and pipe end (10 ⁇ 8) transversely to its longitudinal axis. Due to the spring action of the drawstrings (97), the press jaws (94, 95) rest on the circumference of the coupling sleeve (10 ⁇ 1), even here only with the outer transverse edges. Then the drive device (10 ⁇ 3) is set in such a way that the upper arms (10 ⁇ 7) of the drive lever (10 ⁇ 4) grasp the coupling attachments (10 ⁇ 2) on the outside, as can be seen from FIG. (7).
  • the press tool (92) is functionally similar to the press tool (91). It also has a press ring (10 ⁇ 9), which has three press jaws (110 ⁇ , 111) of the same arc length.
  • the upper press jaw (110 ⁇ ) is fixedly arranged on a press jaw support (112), while the two lower press jaws (111) are displaceably guided in the circumferential direction on the press jaw supports (113).
  • the lower press jaw carriers (113) are articulated on the upper press jaw carriers (112) via swivel joints (114).
  • the lower press jaws (111) have notches (115) on their outer circumferences, into which pins (116), which are axially displaceably mounted, engage in the lower press jaw carriers (113). These pins (116) are spring-loaded via compression springs (117) in the direction of the notches (115).
  • the pins (116) and the notches (115) are arranged so that the pins (116) endeavor to move the lower press jaws (111) against each other in the circumferential direction, i.e. the right lower press jaw (111) shown clockwise and the Press jaw, not shown here, counterclockwise. Stops not shown here ensure that the lower press jaws (113) cannot be moved further in these two directions beyond a certain maximum dimension.
  • drive bolts (118) are arranged perpendicular to the plane of the drawing, which take over the function of the coupling lugs (10-2) in the pressing tool (91).
  • the drive device (10 ⁇ 3) shown in the left half of the figures (7) and (8) can be attached to these drive bolts (118) by placing the upper arms (10 ⁇ 7) of the drive levers (10 ⁇ 4) on the outer sides of the drive bolts (118) will.
  • the pressing tool (92) is handled in the same way as the pressing tool (91).
  • the press ring (10 ⁇ 9) is pushed over the coupling sleeve (10 ⁇ 1) and the pipe end (10 ⁇ 8) transversely to its longitudinal axis, the two lower press jaw carriers (113) being opened, i.e. H. are pivoted outwards, as is indicated by dash-dotted lines.
  • the lower press jaw carriers (113) are then brought into contact with the outer circumference of the coupling sleeve (10 ⁇ 1).
  • the abovementioned stops for limiting the movement of the lower press jaws (111) in the circumferential direction are arranged in such a way that gaps (119, 120 ⁇ ) of the same size between the end faces of the press jaws (110 ⁇ , 111) result when the coupling sleeve (10 Kupplungs1) is in contact.
  • the lower press jaws (113) By further spreading the lower arms (10 ⁇ 6) of the drive lever (10 ⁇ 4), the lower press jaws (113) are pivoted inwards, the lower press jaws (111) automatically move in the circumferential direction M, namely the right press jaw (111) shown counterclockwise and the left press jaw, not shown here, clockwise. This continues until the end faces of the press jaws (110 ⁇ , 111) come to rest at the end of the press. This state can be seen in the right half of the figure (8).
  • the pressing tool (92) differs kinematically and therefore in principle not from the pressing tool according to the figures (5) and (6) and also from the pressing tool (31) according to the figures (3) and (4), because even with these pressing tools ( 61, 31) the pressing movement of the pressing jaws (72, 73) or (42, 43) could be brought about by the fact that the upper arms (70 ⁇ , 71) or (40 ⁇ , 41) of the drive levers (64, 65 ) or (34, 35) in the area of the upper column (87) or (57) can be contracted by attaching a suitably designed, separate drive device. In this case, the lower arms (68, 69) or (38, 39) of the drive lever (64, 65) or (34, 35) could be dispensed with.
  • the pressing tools (91, 92) can also be formed in one piece, i. H. the drive device (10 ⁇ 3) can be connected to one of the press jaws (94, 95, 110 ⁇ , 111) via a corresponding housing part.
  • this press jaw (94, 95, 110 ⁇ , 111) would be comparable to the abutments (4, 54, 84) in the exemplary embodiments according to the figures (1) to (6).
  • One of the lower pressing jaws (95, 111) can also be the pressing jaw (95, 111) which is arranged in a fixed position on the pressing tool (91, 92) and performs the function of the abutment. In this case, only one drive lever (10 ⁇ 4) is required to pull the press jaws (94, 95, 110 ⁇ , 111) together.

Abstract

A press tool (91, 92) for connecting tubular workpieces (101, 108) has more than two pressing jaws (94, 95, 110, 111) and these can be moved relative to one another in such a way with the aid of at least one driving device (103) that they can be moved out of an open position, in which the press tool can be placed on the workpiece (101, 108), into a pressing position, in which the pressing jaws (94, 95, 110, 111) complement one another to form a closed pressing space. According to the invention, the pressing jaws (94, 95, 110, 111) are connected to one another in a jointed manner to form a pressing ring (93, 109), the pressing ring (93, 109) being open between two pressing jaws (95, 111) and being closable by means of the driving device(s) (103) thereby being drawn together. <IMAGE>

Description

Die Erfindung betrifft ein Preßwerkzeug, insbesondere zum Verbinden von rohrförmigen Werkstücken, mit mehr als zwei bogenförmigen Preßbacken, die derart relativ zueinander beweglich sind, daß sie zum Aufsetzen auf das Werkstück öffenbar sind und daß sie sich zum Preßende hin zu einem geschlossenen Preßraum ergänzen, sowie mit wenigstens einer Antriebseinrichtung zur Bewegung von Preßbacken in Preßrichtung.The invention relates to a pressing tool, in particular for connecting tubular workpieces, with more than two arcuate pressing jaws which are movable relative to one another in such a way that they can be opened for placement on the workpiece and that they complement one another towards the end of the pressing to form a closed pressing space, and with at least one drive device for moving pressing jaws in the pressing direction.

Zur Verbindung von Rohrenden werden Kupplungshülsen verwendet, die plastisch verformbar sind und aus Metall, vorzugsweise aus Stahl bestehen. Ihr Innendurchmesser ist um so viel größer als der Außendurchmesser der zu verbindenden Rohrenden, daß sie bei radialer Zusammenpressung bis zum Anliegen an der Mantelfläche der Rohrenden bleibend verformt werden. Nach der DE-PS 1 187 870̸ können solche Kupplungshülsen an ihrer Innenseite in der Nähe jedes Endes zusätzlich eine Ringnut aufweisen, in die ein elastischer Dichtungsring eingelegt ist.Coupling sleeves are used to connect pipe ends, which are plastically deformable and made of metal, preferably steel. Their inner diameter is so much larger than the outer diameter of the pipe ends to be connected that they are permanently deformed in the event of radial compression until they abut the outer surface of the pipe ends. According to DE-PS 1 187 870̸, such coupling sleeves can additionally have an annular groove on the inside near each end, into which an elastic sealing ring is inserted.

Das radiale Zusammenpressen geschieht mittels Preßwerkzeugen, wie sie beispielsweise aus der DE-PS 21 36 782 bekannt sind. Dieses Preßwerkzeug weist zwei jeweils zweiarmig ausgebildete Klemmbacken auf, von denen wenigstens einer schwenkbar an dem Preßwerkzeug gelagert ist. Die Preßbacken weisen Kreisbogenabschnitte bildende Preßflächen mit gleichen Radien auf, die einen Preßraum einschließen. Statt als Kreisbogenabschnitte können die Preßflächen auch konturiert sein, um beispielsweise einen mehreckigen oder ovalen Preßraum zu bilden.The radial compression takes place by means of pressing tools, as are known for example from DE-PS 21 36 782. This pressing tool has two clamping arms, each with two arms, at least one of which is pivotably mounted on the pressing tool. The press jaws have press surfaces which form circular arc sections and have the same radii and enclose a press chamber. The pressing surfaces can also be contoured instead of as circular arc sections be, for example, to form a polygonal or oval press room.

Die dem Preßraum entfernt liegenden Arme der Preßbacken können gegen die Wirkung einer Feder gespreizt werden mit der Folge, daß die Preßbacken im Bereich des Preßraums gegeneinander bewegt werden. Das Spreizen geschieht mittels nebeneinander angeordneter und aneinander anliegender Druckrollen, die gemeinsam mittels einer Antriebeseinrichtung in Form eines Arbeitszylinders zwischen die Arme gefahren werden und auf diese Weise die Preßbacken verschwenken.The arms of the press jaws which are distant from the press chamber can be spread against the action of a spring, with the result that the press jaws are moved against one another in the region of the press chamber. The spreading takes place by means of pressure rollers which are arranged next to one another and lie against one another and which are moved together between the arms by means of a drive device in the form of a working cylinder and in this way pivot the press jaws.

Eine Weiterentwicklung dieses Preßwerkzeuges ist in der DE-OS 34 23 283 beschrieben. Bei diesem Preßwerkzeug sind zwei Preßbacken vorgesehen, die jeweils an einem Antriebshebel schwenkbar gelagert sind, welche wiederum schwenkbar an dem Preßwerkzeug geführt sind. Die Antriebshebel weisen gegenüberliegende Arme auf, die mittels von einem Arbeitszylinder in den Zwischenraum einfahrbaren Druckrollen gespreizt werden können und auf diese Weise die Preßbacken aufeinanderzu bewegen. Die Preßbacken sind dabei zusätzlich in Kulissen derart geführt, daß sie beim Verschwenken der Antriebshebel in öffnungsrichtung um ihre Anlenkpunkte an den Antriebshebeln aufgeschwenkt werden, so daß zwischen den Stirnseiten der Preßbacken eine weite, maulartige Öffnung entsteht, die die Aufnahme der zu verbindenden Rohrenden bzw. einer Kupplungshülse erleichtert.A further development of this pressing tool is described in DE-OS 34 23 283. In this press tool, two press jaws are provided which are each pivotably mounted on a drive lever, which in turn are pivotably guided on the press tool. The drive levers have opposite arms which can be spread by means of pressure rollers which can be moved into the intermediate space by a working cylinder and in this way move the pressing jaws towards one another. The press jaws are additionally guided in scenes in such a way that when the drive lever is pivoted in the opening direction they are pivoted open about their articulation points on the drive levers, so that a wide, mouth-like opening is created between the end faces of the press jaws, which accommodates the pipe ends to be connected or a coupling sleeve facilitated.

Beim Verschwenken der Antriebshebel in umgekehrter Richtung werden die Klemmbacken wieder so verschwenkt, daß die Mittelsenkrechten auf ihre Bogenabschnitte in etwa ineinanderfallen und die Klemmbacken beim weiteren Verschwenken der Antriebshebel parallel gegeneinander verschoben werden. Während des Preßvorgangs werden die Klemmbacken weiter gegeneinander bewegt, bis sie am Preßende eine Kreisfläche einschließen und dabei die Rohrenden bzw. die Kupplungshülse entsprechend unter Durchmesserverringerung verformt haben.When pivoting the drive lever in the opposite direction, the clamping jaws are pivoted again so that the perpendicular to their arc sections approximately collapse and the clamping jaws are moved parallel to each other when the drive lever is pivoted further. During the pressing process, the clamping jaws are moved further towards each other until they enclose a circular area at the end of the press and thereby the pipe ends or the coupling sleeve have deformed accordingly while reducing the diameter.

Dieses Preßwerkzeug hat sich bewährt, wenn eine nicht zu große Durchmesserverkleinerung bzw. Einpreßtiefe gefordert wird. Bei größeren Einpreßtiefen, die dann erforderlich sind, wenn die Rohrverbindung höheren Innendrücken standhalten soll, ist es erforderlich, mehr als zwei Preßbacken vorzusehen, damit es zwischen den Stirnseiten der Preßbacken nicht zum Ausbilden von nach außen vorstehenden Stegen kommt, welche ein vollständiges Schließen der Preßbacken verhindern würden. Solche Preßwerkzeuge sind beispielsweise in der DE-OS 21 18 782, DE-OS 35 13 129, DE-AS 25 11 942 und DE-AS 19 0̸7 956 beschrieben. Allen darin offenbarten Preßwerkzeugen ist gemeinsam, daß sämtliche Preßbacken beweglich und in radialer Richtung geführt sind. Dies bedingt aufwendige Führungen und Antriebseinrichtungen, wodurch die Preßwerkzeuge schwer und deshalb schlecht handhabbar und ferner auch teuer sind.This press tool has proven itself when a not too large reduction in diameter or press-in depth is required. For larger press-in depths, which are required if the pipe connection is to withstand higher internal pressures, it is necessary to provide more than two press jaws so that there is no formation of outwardly projecting webs between the end faces of the press jaws, which leads to a complete closing of the press jaws would prevent. Such pressing tools are described for example in DE-OS 21 18 782, DE-OS 35 13 129, DE-AS 25 11 942 and DE-AS 19 0 197 956. All the pressing tools disclosed therein have in common that all pressing jaws are movable and guided in the radial direction. This requires complex guides and drive devices, making the pressing tools difficult and therefore difficult to handle and also expensive.

Der Erfindung liegt demnach die Aufgabe zugrunde, ein Preßwerkzeug der eingangs genannten Art so zu gestalten, daß es trotz der Anordnung von mehr als zwei Preßbacken möglichst einfach und damit leicht handhabbar ausgebildet sowie kostengünstig herstellbar ist.The invention is therefore based on the object of designing a press tool of the type mentioned in such a way that, despite the arrangement of more than two press jaws, it is as simple as possible and thus easy to handle and can be produced inexpensively.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß eine der Preßbacken als eine am Werkstück ansetzbares Widerlager ausgebildet ist und die übrigen Preßbacken mittels der bzw. den Antriebseinrichtung(en) bewegbar und dabei derart geführt sind, daß sie sich beim Preßvorgang jeweils in Richtung auf den Mittelpunkt des Preßraumes im geschlossenen Zustand des Preßwerkzeuges bewegen. Dabei ist es zweckmäßig, wenn die Preßbacken derart beweglich zueinander geführt sind, daß ihre jeweils benachbart gegenüberliegenden Stirnflächen zu Preßbeginn gleiche Abstände haben.This object is achieved in that one of the press jaws is designed as an abutment that can be attached to the workpiece and the other press jaws are movable by means of the drive device (s) and are guided in such a way that they each move towards the center during the pressing process move the press room in the closed state of the press tool. It is expedient if the press jaws are guided such that they can move relative to one another in such a way that their respective opposite end faces have the same spacing at the start of the press.

Das Preßwerkzeug nach der Erfindung zeichnet sich durch einfachen Aufbau aus, da eine der Preßbacken als Widerlager ausgebildet ist und somit weder einer Führung noch einer Antriebseinrichtung bedarf. Dabei werden die übrigen Preßbacken so geführt und angetrieben, daß sie sich beim Preßvorgang in ganz bestimmten Richtungen bewegen, und zwar auf den Mittelpunkt des Preßraumes in geschlossenem Zustand des Preßwerkzeuges hin. Dies ist ganz wesentlich dafür, daß auf das Werkstück von allen Seiten gleiche Kräfte wirken.The pressing tool according to the invention is characterized by simple structure, since one of the press jaws is designed as an abutment and thus requires neither a guide nor a drive device. The remaining press jaws are guided and driven so that they move in very specific directions during the pressing process, specifically towards the center of the pressing chamber in the closed state of the pressing tool. This is very important for the same forces acting on the workpiece from all sides.

In Ausbildung der Erfindung ist vorgesehen, daß die Preßbacken in Umfangsrichtung gleichlange Kreisbogenabschnitte aufweisen, die Spalte zwischen den jeweils gegenüberliegenden Stirnseiten der Preßbacken also über den Umfang gleichmäßig verteilt sind.In an embodiment of the invention it is provided that the press jaws have circular arc sections of equal length in the circumferential direction, that is to say the gaps between the respective opposite end faces of the press jaws are distributed uniformly over the circumference.

Wenn drei Preßbacken vorgesehen sind, sollten die Bewegungsrichtungen der beiden beweglichen Preßbacken einen Winkel von 60̸° einschließen, der symmetrisch zur Mittelsenkrechten auf das Widerlager liegt und sich von diesem weggerichtet öffnet. Bei vier Preßbacken sollten die Bewegungsrichtungen der beiden dem Widerlager benachbarten Preßbacken beim Preßvorgang einen Winkel von 90̸° einschließen, der symmetrisch zur Mittelsenkrechten auf das Widerlager liegt und sich von diesem weggerichtet öffnet.If three press jaws are provided, the directions of movement of the two movable press jaws should include an angle of 60 °, which is symmetrical to the perpendicular to the abutment and opens away from it. With four press jaws, the directions of movement of the two press jaws adjacent to the abutment should include an angle of 90 ° during the pressing process, which lies symmetrically to the perpendicular to the abutment and opens away from it.

Nach einem weiteren Merkmal der Erfindung ist vorgesehen, daß das Widerlager als am freien Ende des Preßwerkzeuges befindlicher Widerlagerbügel ausgebildet ist, der auf einer Seite schwenkbar gelagert ist und der an der gegenüberliegenden Seite lösbar bzw. verriegelbar ist. Dieser Widerlagerbügel kann weggeschwenkt werden, wenn das Preßwerkzeug an die zu verbindenden Rohrenden bzw. an die Kupplungshülse angesetzt wird. Nach Zurückschwenken und Verriegeln können dann die beweglichen Preßbacken mittels der Antriebseinrichtung in Richtung auf das Widerlager bewegt werden.According to a further feature of the invention, it is provided that the abutment is designed as an abutment bracket located at the free end of the pressing tool, which is pivotably mounted on one side and which can be released or locked on the opposite side. This abutment bracket can be pivoted away when the pressing tool is attached to the pipe ends to be connected or to the coupling sleeve. After swiveling back and locking, the movable press jaws can then be moved in the direction of the abutment by means of the drive device.

In weiterer Ausgestaltung der Erfindung ist vorgesehen, daß die bewegbaren Preßbacken einerseits an deren Bewegungsrichtungen vorgebenden Führungseinrichtungen und andererseits an einem in Richtung auf das Widerlager bewegbaren Preßstempel anliegen, der mit der bzw. den Antriebseinrichtungen verbunden ist und an dem die dem Widerlager benachbarten Preßbacken verschiebbar gelagert sind. Dabei besteht die Möglichkeit, daß zwischen den zum Preßstempel verschiebbaren Preßbacken eine weitere Preßbacke am Preßstempel anliegt oder mit diesem verbunden ist, die dem Widerlager gegenübersteht. Der Preßstempel ist dabei Teil der Antriebseinrichtung und kann beispielsweise als Hydraulikzylinder ausgebildet oder mit einem solchen verbunden sein. Anstatt eines solchen Preßstempels kann auch für jede bewegliche Preßbacke eine eigene Antriebseinrichtung vorgesehen sein, beispielsweise wiederum jeweils ein Hydraulikzylinder. Dieser kann einen Preß- oder Zugstempel aufweisen.In a further embodiment of the invention it is provided that the movable press jaws on the one hand rest against their guide directions and on the other hand on a movable press die in the direction of the abutment, which is connected to the drive device (s) and on which the press jaws adjacent to the abutment are slidably mounted. There is the possibility that between the press jaws displaceable to the press die, another press die rests on the press die or is connected to it, which faces the abutment. The press ram is part of the drive device and can be designed, for example, as a hydraulic cylinder or connected to one. Instead of such a press ram, a separate drive device can also be provided for each movable press jaw, for example, again a hydraulic cylinder. This can have a press or tension stamp.

Davon abweichend besteht aber auch die Möglichkeit, daß zumindest ein Teil der beweglichen Preßbacken an Schwenkhebeln sitzt, die über die Antriebseinrichtung(en) verschwenkbar sind. Solche Schwenkhebelanordnungen sind schon der DE-OS 34 23 283 zu entnehmen. Sie können ortsfest am Preßwerkzeug gelagert sein, zumindest was die Betätigung der dem Widerlager benachbarten Preßbacken angeht. Dabei besteht in Analogie zu dem Preßwerkzeug nach der DE-OS 34 23 283 die Möglichkeit, die Preßbacken an Preßbackenträgern anzuordnen, die an den Schwenkhebeln verschwenkbar gelagert sind. Zur Steuerung der Bewegung der Preßbackenhalter kann eine Kulissenführung vorgesehen sein, wie sie ebenfalls schon der DE-AS 34 23 283 zu entnehmen ist.Deviating from this, however, there is also the possibility that at least some of the movable press jaws are seated on pivoting levers which can be pivoted via the drive device (s). Such pivot lever arrangements can already be found in DE-OS 34 23 283. They can be fixed in place on the pressing tool, at least as far as the actuation of the pressing jaws adjacent to the abutment is concerned. Analogous to the pressing tool according to DE-OS 34 23 283, there is the possibility of arranging the pressing jaws on pressing jaw carriers which are pivotably mounted on the pivot levers. To control the movement of the press jaw holder, a link guide can be provided, as can also be found in DE-AS 34 23 283.

Nach der Erfindung ist des weiteren vorgesehen, daß das Widerlager Teil eines Preß mit gelenkartig verbundenen Preßbacken ist, der zwischen zwei Preßbacken offen ist, wobei der Preßring mittels der bzw. den Antriebseinrichtungen schließbar ist. Hierzu können die Antriebseinrichtung(en) an den freien Enden des Preßrings angreifen. Diese Ausführungsform eröffnet die Möglichkeit, daß die Antriebseinrichtung(en) von dem Preßring getrennt ausgebildet ist bzw. sind und die Antriebseinrichtung(en) und der Preßring Kupplungselemente aufweisen, über die sie miteinander in Wirkverbindung bringbar sind. Das Preßwerkzeug ist also hier zweiteilig ausgebildet, wobei der Preßring zunächst um das Werkstück gelegt und die als Widerlager dienende Preßbacke zur Anlage gebracht wird, und dann das Preßwerkzeug an den Preßring angesetzt wird. Diese Ausführungsform ist in ihrer Handhabung sehr vorteilhaft, da die Einzelteile ein wesentlich geringeres Gewicht haben und unabhängig voneinander handhabbar sind.According to the invention it is further provided that the abutment is part of a press with press jaws connected in an articulated manner, which is open between two press jaws, the press ring being closable by means of the drive device (s). For this purpose, the drive device (s) can engage at the free ends of the press ring. This embodiment opens up the possibility that the drive device (s) is or are separate from the press ring and the drive device (s) and the press ring have coupling elements, by means of which they can be brought into operative connection with one another. The pressing tool is thus formed in two parts, the pressing ring first being placed around the workpiece and the pressing jaw serving as an abutment being brought into contact, and then the pressing tool being attached to the pressing ring. This embodiment is very advantageous in its handling, since the individual parts have a significantly lower weight and can be handled independently of one another.

Dabei kann der Preßring wenigstens eine außenseitig an zumindest den bewegbaren Preßbacken anliegendes Zugband aufweisen, über das bzw. die die Preßbacken zusammenbewegbar sind, wobei hierfür auch zwei Zugbänder vorgesehen sein können. Diese Ausführung ist besonders gewichts- und kostensparend.In this case, the press ring can have at least one tension band lying on the outside against at least the movable press jaws, by means of which the pressure jaws can be moved together, wherein two tension bands can also be provided for this purpose. This version is particularly weight and cost-saving.

Damit die stirnseitigen Abstände der Preßbacken zu Beginn des Preßvorgangs exakt gleich sind, ist nach einem weiteren Merkmal der Erfindung vorgeschlagen, daß zumindest ein Teil der Preßbacken in Preßbackenträgern relativ zu diesen bewegbar geführt ist, wobei entsprechende Führungseinrichtungen vorgesehen sind, die garantieren, daß die stirnseitigen Abstände der Preßbacken zu Beginn des Preßvorgangs gleich sind. Dabei können die Preßbacken im wesentlichen in Umfangsrichtung beweglich geführt sein. Als Führungseinrichtungen kommen Kulissenführungen aber auch eine gegen Anschläge gerichtete Federbeaufschlagung in Frage.So that the end distances of the pressing jaws are exactly the same at the beginning of the pressing process, it is proposed according to a further feature of the invention that at least some of the pressing jaws in the pressing jaw carriers are movably guided relative to these, with corresponding guide devices being provided which guarantee that the front ends Distances of the press jaws are the same at the beginning of the pressing process. The press jaws can be guided so that they can move substantially in the circumferential direction. However, slide guides that are directed against spring stops can also be used as guide devices.

In der Zeichnung ist die Erfindung anhand von Ausführungsbeispielen näher veranschaulicht. Es zeigen:

Figur ( 1)
ein Preßwerkzeug in Offenstellung;
Figur ( 2)
das Preßwerkzeug gemäß Figur (1) in Schließstellung;
Figur ( 3)
ein anderes Preßwerkzeug in Offenstellung;
Figur ( 4)
das Preßwerkzeug gemäß Figur (3) in Schließstellung;
Figur ( 5)
ein weiteres Preßwerkzeug in Offenstellung;
Figur ( 6)
das Preßwerkzeug gemäß Figur (5) in Schließstellung;
Figur ( 7)
die hälftige Darstellung von zwei weiteren Preßwerkzeugen in Offenstellung;
Figur ( 8)
die Preßwerkzeuge gemäß Figur (7) in Schließstellung;

In den Figuren (1) und (2) ist ein Preßwerkzeug (1) dargestellt und zwar nur dessen oberes Kopfteil. Es weist ein Werkzeuggehäuse (2) auf, das innen hohl ausgebildet ist und sich nach oben hin zunächst verbreitert und dann konisch zuläuft. Im mittleren Bereich weist es eine U-förmige Ausnehmung (3) auf.In the drawing, the invention is illustrated in more detail using exemplary embodiments. Show it:
Figure (1)
a pressing tool in the open position;
Figure (2)
the pressing tool according to Figure (1) in the closed position;
Figure (3)
another press tool in the open position;
Figure (4)
the pressing tool according to Figure (3) in the closed position;
Figure (5)
another pressing tool in the open position;
Figure (6)
the pressing tool according to Figure (5) in the closed position;
Figure (7)
the half representation of two other pressing tools in the open position;
Figure (8)
the pressing tools according to Figure (7) in the closed position;

In the figures (1) and (2), a pressing tool (1) is shown and only its upper head part. It has a tool housing (2) which is hollow on the inside and initially widens towards the top and then tapers. In the central area it has a U-shaped recess (3).

Die freien Enden der Ausnehmung (3) sind durch einen Widerlagerbügel (4) verbunden. Der Widerlagerbügel (4) ist an seiner in dieser Ansicht rechten Seite um einen Lagerbolzen (5) verschwenkbar gelagert. An der in dieser Ansicht linken Seite ist der Widerlagerbügel (4) über einen Sperrbolzen (6) in der gezeigten Stellung fixiert. Dieser Sperrbolzen (6) geht durch entsprechende Ausnehmungen im Werkzeuggehäuse (2) und im Widerlager (4) und kann leicht entfernt werden. Nach seiner Entfernung kann der Widerlagerbügel (4) um den Lagerbolzen (5) in den Richtungen des Doppelpfeils A verschwenkt werden, und zwar im Uhrzeigersinn so weit, daß die Ausnehmung (3) nach oben hin vollständig geöffnet ist.The free ends of the recess (3) are connected by an abutment bracket (4). The abutment bracket (4) is pivotally mounted on its right side in this view about a bearing pin (5). On the left side in this view, the abutment bracket (4) is fixed in the position shown via a locking pin (6). This locking pin (6) passes through corresponding recesses in the tool housing (2) and in the abutment (4) and can be easily removed. After its removal, the abutment bracket (4) can be pivoted around the bearing pin (5) in the directions of the double arrow A, clockwise until the recess (3) is up is fully open.

Innenseitig hat der Widerlagerbügel (4) eine Preßfläche (7), die Kreisbogenform hat und sich über einen Winkel von 120̸° symmetrisch zur Längsachse des Preßwerkzeuges (1) erstreckt. Die Preßfläche (7) hat eine in Umfangsrichtung verlaufende, nach innen offene Nut. Sie kann auswechselbar an dem Widerlagerbügel (4) befestigt sein.On the inside, the abutment bracket (4) has a pressing surface (7) which has the shape of a circular arc and extends over an angle of 120 ° symmetrically to the longitudinal axis of the pressing tool (1). The pressing surface (7) has a groove which runs in the circumferential direction and is open inwards. It can be exchangeably attached to the abutment bracket (4).

Innerhalb des Werkzeugegehäuses (2) verlaufen schräge Führungsflächen (8, 9), die einen Winkel von 60̸° einschließen und spiegelsymmetrisch zur Längsachse des Preßwerkzeugs (1) verlaufen. An den Führungsflächen (8, 9) liegen je eine Preßbacke (10̸, 11) an, und zwar über entsprechend geneigte Anlageflächen (12, 13). Die Preßbacken (10̸, 11) sind ebenfalls spiegelsymmetrisch zur Längsachse des Preßwerkzeuges (1) ausgebildet und weisen jeweils eine Preßfläche (14, 15) auf, die jeweils als sich über 120̸° erstreckende Kreisbogenabschnitte ausgebildet sind. Innenseitig ist auch in sie eine umlaufende Nut eingeformt. Die Kreisbogenabschnitte sämtlicher Preßflächen (7, 14, 15) haben identische Radien. Die Preßbacken (10̸, 11) ragen untenseitig in eine horizontal und quer zur Längsachse des Preßwerkzeuges (1) verlaufende Führungsnut (16) hinein, die in dem Kopf (17) eines Preßstempels (18) eingeformt ist. Die Unterseiten der Preßbacken (10̸, 11) verlaufen ebenfalls horizontal, so daß die Preßbacken (10̸, 11) in der Nut (16) quer zur Längsachse des Preßwerkzeuges (1) verschieblich in der Nut (16) geführt sind, und zwar nach Art einer Schwalbenschwanzführung formschlüssig.Sloping guide surfaces (8, 9), which enclose an angle of 60 ° and run mirror-symmetrically to the longitudinal axis of the pressing tool (1), run inside the tool housing (2). One press jaw (10 8, 11) each lies on the guide surfaces (8, 9), specifically via correspondingly inclined contact surfaces (12, 13). The pressing jaws (10̸, 11) are also mirror-symmetrical to the longitudinal axis of the pressing tool (1) and each have a pressing surface (14, 15), each of which is designed as a circular arc section extending over 120 °. A circumferential groove is also formed on the inside. The circular arc sections of all pressing surfaces (7, 14, 15) have identical radii. The pressing jaws (10̸, 11) protrude on the underside into a guide groove (16) which runs horizontally and transversely to the longitudinal axis of the pressing tool (1) and is formed in the head (17) of a pressing die (18). The undersides of the pressing jaws (10̸, 11) also run horizontally, so that the pressing jaws (10̸, 11) are guided in the groove (16) displaceably in the groove (16) transversely to the longitudinal axis of the pressing tool (1), in accordance with Art a dovetail guide.

In die unteren Abschnitte der Preßbacken (10̸, 11) sind querverlaufende Sacklöcher (19, 20̸) eingeformt, die koaxial zueinander liegen. In diese Sacklöcher (19, 20̸) ist eine Druckfeder (21) eingesetzt, die bestrebt ist, die Preßbacken (10̸, 11) nach außen und damit über die Anlageflächen (12, 13) an die Führungsflächen (8, 9) zu pressen. Der Preßstempel (18) ist vertikal in Richtung der Längsachse des Preßwerkzeuges (1) (Doppelpfeil B) linear beweglich gelagert. Er wird von einem pneumatisch oder hydraulisch beaufschlagten Arbeiteszylinder betätigt, der hier nicht näher dargestellt ist.In the lower sections of the press jaws (10̸, 11) transverse blind holes (19, 20̸) are formed, which are coaxial to each other. In these blind holes (19, 20̸) a compression spring (21) is used, which endeavors to press the press jaws (10̸, 11) outwards and thus over the contact surfaces (12, 13) to the guide surfaces (8, 9). The press ram (18) is mounted vertically linearly movable in the direction of the longitudinal axis of the pressing tool (1) (double arrow B). It is actuated by a pneumatically or hydraulically actuated working cylinder, which is not shown here.

Für den Gebrauch des Preßwerkzeuges (1) wird zunächst die Verriegelung des Widerlagerbügels (4) mittels des Sperrbolzens (6) gelöst, d.h. dieser Sperrbolzen (6) wird herausgezogen und der Widerlagerbügel (4) im Uhrzeigersinn soweit verschwenkt, bis die gabelförmige Öffnung der Ausnehmung (3) vollständig frei ist. Gleichzeitig befindet sich der Preßstempel (18) in einer nach unten zurückgezogenen Stellung. Das Preßwerkzeug (1) kann dann an eine Kupplungshülse (22) derart angesetzt werden, daß sich die Kupplungshülse (22) senkrecht zur Zeichnungsebene durch die Ausnehmung (3) erstreckt und von dieser aufgenommen wird. Dann wird das Widerlager (4) um die Kupplungshülse (22) herum zurückgeschwenkt und durch Einsetzen des Sperrbolzens (6) verriegelt. Die Kupplungshülse (22) ist dann von dem Preßwerkzeug (1) eingeschlossen.To use the pressing tool (1), the locking of the abutment bracket (4) is first released using the locking bolt (6), i.e. this locking pin (6) is pulled out and the abutment bracket (4) swiveled clockwise until the fork-shaped opening of the recess (3) is completely free. At the same time, the press ram (18) is in a downwardly retracted position. The pressing tool (1) can then be attached to a coupling sleeve (22) such that the coupling sleeve (22) extends through the recess (3) perpendicular to the plane of the drawing and is received by the latter. Then the abutment (4) is pivoted back around the coupling sleeve (22) and locked by inserting the locking bolt (6). The coupling sleeve (22) is then enclosed by the pressing tool (1).

Die Preßbacken (10̸, 11) werden dann durch Hochfahren des Preßstempels (18) an der Kupplungshülse (23) zur Anlage gebracht. Da ihr Radius um die vorgesehende Einpresstiefe kleiner ist als der Radius der Kupplungshülse (22) vor dem Verpressen, liegen die Preßflächen (7, 14, 15) nur mit ihren äußeren Querkanten an dem Umfang der Kupplungshülse (22) an.Zwischen den Stirnseiten der Preßbacken (10̸, 11) und des Widerlagerbügels (4) sind noch freie Spalte (23, 24, 25), die gleichgroß sind. Die Radien der Kreisbogenabschnitte der Preßflächen (7, 14, 15) gehen von Mittelpunkten aus, die in den Spitzen eines gleichseitigen Dreiecks liegen.The press jaws (10̸, 11) are then brought into contact with the coupling sleeve (23) by raising the press ram (18). Since their radius is smaller by the intended insertion depth than the radius of the coupling sleeve (22) before pressing, the pressing surfaces (7, 14, 15) only lie with their outer transverse edges on the circumference of the coupling sleeve (22). Between the end faces of the Press jaws (10̸, 11) and the abutment bracket (4) are still free gaps (23, 24, 25), which are the same size. The radii of the circular arc sections of the pressing surfaces (7, 14, 15) start from centers which lie in the tips of an equilateral triangle.

Durch weitere Druckbeaufschlagung wird nun der Preßstempel (18) nach oben verfahren. Die Preßbacken (10̸, 11) gleiten dabei über ihre Anlageflächen (12, 13) über die Führungsflächen (8, 9), wodurch ihnen eine in den Richtungen der Doppelpfeile C, D verlaufende Bewegungsrichtung aufgeprägt wird. Die beiden Bewegungsrichtungen schließen denselben Winkel ein wie die Führungsflächen (8, 9), d.h. 60̸ °. Dabei gleiten die Preßbacken (10̸, 11) in der Nut (16) des Preßstempels (18) gleichzeitig horizontal in Richtung aufeinander zu, und zwar gegen die Wirkung der Druckfeder (21). Auf diese Weise wird die Kupplungshülse (22) radial gestaucht, d.h. in ihrem Durchmesser um die gewünschte Einpreßtiefe verringert. Am Preßende wird von den Preßflächen (7, 14, 15) ein kreisrunder Preßraum eingeschlossen und haben sich die Spalte (23, 24, 25) auf Null verringert.The press ram (18) is then moved upward by further pressurization. The press jaws (10̸, 11) slide over their contact surfaces (12, 13) over the guide surfaces (8, 9), which means that one in the directions of the double arrows C, D running direction of movement is impressed. The two directions of movement enclose the same angle as the guide surfaces (8, 9), ie 60 °. The press jaws (10̸, 11) slide simultaneously in the groove (16) of the press ram (18) towards each other, against the action of the compression spring (21). In this way, the coupling sleeve (22) is radially compressed, ie its diameter is reduced by the desired press-in depth. At the end of the press, a circular press space is enclosed by the press surfaces (7, 14, 15) and the gaps (23, 24, 25) have been reduced to zero.

Für das Entfernen des Preßwerkzeugs (1) von der Kupplungshülse (22) wird der Preßstempel (18) wieder zurückgefahren. Der Widerlagerbügel (4) wird nach Entfernen des Sperrbolzens (6) weggeschwenkt, so daß dann das Preßwerkzeug (1) weggenommen werden kann.To remove the press tool (1) from the coupling sleeve (22), the press ram (18) is moved back again. The abutment bracket (4) is pivoted away after removing the locking bolt (6) so that the pressing tool (1) can then be removed.

In den Figuren (3) und (4) ist ein Preßwerkzeug (31) ebenfalls nur teilweise dargestellt, und zwar der Kopfbereich. Das Preßwerkzeug (31) weist ein Werkzeuggehäuse (32) auf, daß innen hohl ausgebildet ist und das sich nach unten hin für die Aufnahme eines Antriebes und zum Zwecke der Handhabung verlängert, was hier nicht näher dargestellt ist.In Figures (3) and (4), a pressing tool (31) is also only partially shown, namely the head area. The pressing tool (31) has a tool housing (32) which is hollow on the inside and which extends downwards for receiving a drive and for the purpose of handling, which is not shown here.

In dem Werkzeuggehäuse (32) sind spiegelbildlich zur Längsachse (33) zwei Antriebshebel (34, 35) um sich senkrecht zur Zeichnungsebene erstreckende Schwenkbolzen (36, 37) verdrehbar gelagert. Die nach unten zeigenden Arme (38, 39) der Antriebshebel (34, 35) werden zum Verschwenken in den Richtungen der Pfeile E, F gespreizt, und zwar gegen die Wirkung einer hier nicht näher dargestellten, die Arme (38, 39) zusammenziehenden Feder. Zum Spreizen der Arme (38, 39) wird ein Druckrollenpaar verwendet, das mit Hilfe eines pneumatisch oder hydraulisch beaufschlagbaren Arbeitszylinders in den Zwischenraum zwischen die Arme (38, 39) einfahrbar ist. Eine solche Antriebseinrichtung ist an sich aus der DE-PS 21 36 782 und DE-OS 34 23 382 bekannt.Two drive levers (34, 35) are mounted in the tool housing (32) as a mirror image of the longitudinal axis (33) so that they can rotate about pivot bolts (36, 37) extending perpendicular to the plane of the drawing. The downward-pointing arms (38, 39) of the drive lever (34, 35) are spread for pivoting in the directions of the arrows E, F, against the action of a spring (not shown here) which contracts the arms (38, 39) . A pair of pressure rollers is used to spread the arms (38, 39), which can be moved into the space between the arms (38, 39) with the aid of a pneumatically or hydraulically actuated working cylinder. A such drive device is known per se from DE-PS 21 36 782 and DE-OS 34 23 382.

In den von den Schwenkbolzen (36, 37) nach oben sich erstreckenden Armen (40̸, 41) der Antriebshebel (34, 35) sind Preßbacken (42, 43) aufgenommen. Die Preßbacken (42, 43) weisen jeweils innenseitige Preßflächen (44, 45) auf, die jeweils sich über 120̸° erstreckende Kreisbogenabschnitte bilden. Beide Preßbacken (42, 43) sind an den Armen (40̸, 41) der Antriebshebel (34, 35) in den Umfangsrichtungen gemäß Doppelpfeilen G, H beweglich gelagert. Hiezu liegen sie mit ihren Außenseiten an entsprechenden kreisbogenförmigen Führungsflächen (46, 47) in den Armen (40̸, 41) an, welche koaxial zu den Kreisbogenabschnitten der jeweiligen Preßflächen (44, 45) verlaufen.Press jaws (42, 43) are received in the arms (40̸, 41) of the drive lever (34, 35) which extend upwards from the pivot bolts (36, 37). The pressing jaws (42, 43) each have inside pressing surfaces (44, 45) which each form circular arc sections extending over 120 °. Both press jaws (42, 43) are movably mounted on the arms (40̸, 41) of the drive lever (34, 35) in the circumferential directions according to double arrows G, H. For this purpose, they lie with their outer sides on corresponding circular-arc-shaped guide surfaces (46, 47) in the arms (40̸, 41), which run coaxially to the circular arc sections of the respective pressing surfaces (44, 45).

Die Preßbacken (42, 43) weisen seitlich nach außen vorstehende Nasen (48, 49) auf, und zwar zu beiden Seiten der Führungsflächen (46, 47). Die Nasen (48, 49) tragen Führungsvorsprünge (50̸, 51), die in Kulissen (52, 53) formschlüssig einfassen, welche in die Innenseiten des Werkzeuggehäuses (32) eingeformt sind. Auf diese Weise werden die Preßbacken (42, 43) bei einer Schwenkbewegung der Antriebshebel (34, 35) in den Umfangsrichtungen G, H zwangsgeführt.The press jaws (42, 43) have lugs (48, 49) projecting laterally outwards, on both sides of the guide surfaces (46, 47). The lugs (48, 49) carry guide projections (50̸, 51) which form-fit into the scenes (52, 53) which are molded into the inside of the tool housing (32). In this way, the pressing jaws (42, 43) are positively guided in the circumferential directions G, H when the drive lever (34, 35) pivots.

Eine weitere Preßbacke wird von einem Widerlager (54) gebildet, das ortsfest innerhalb des Werkzeuggehäuses (32) angeordnet ist und obenseitig eine Preßfläche (55) aufweist, welche als sich über 120̸° erstreckender Kreisbogenabschnitt ausgebildet ist. Der Kreisbogenabschnitt hat denselben Radius wie diejenigen der übrigen Preßflächen (44, 45).Another press jaw is formed by an abutment (54) which is arranged in a stationary manner within the tool housing (32) and has a pressing surface (55) on the top, which is designed as a circular arc section extending over 120 °. The circular arc section has the same radius as that of the other pressing surfaces (44, 45).

Für den Gebrauch des Preßwerkzeuges (31) werden zunächst die Arme (38, 39) der Antriebshebel (34, 35) von Hand zusammengedrückt, also entgegen den Pfeilen E, F. Hierdurch öffnen sich die Arme (40̸, 41) maulartig und geben zwischen den Stirnseiten der Preßbacken (42, 43) einen Raum frei, so daß das Preßwerkzeug (31) über eine Kupplungshülse (56) quer zu deren Längsachse geschoben werden kann. Nach Anlage der Kupplungshülse (56) an der Preßfläche (55) des Widerlagers (54) können die Preßbacken (42, 43) geschlossen werden. Dies geschieht durch Spreizen der unteren Arme (38, 39) des Antriebshebels (34, 35) mit Hilfe der nicht näher dargestellten Antriebseinrichtung. Die Preßbacken (42, 43) kommen dann an dem Mantel der Kupplungshülse (56) zur Anlage. Da die Radien der Preßflächen (44, 45, 55) um die vorgesehene Einpreßtiefe kleiner sind als der Radius der Kupplungshülse (56) vor dem Verpressen, liegen die Preßflächen (44, 45, 55) nur mit ihren äußeren Querkanten auf dem Umfang der Kupplungshülse (56) an. Damit zwischen den Stirnseiten der Preßbacken (42, 43) und des Widerlagers (54) gleich große Spalte (57, 58, 59) entstehen, sind die Kulissen (52, 53) derart geformt, daß die Preßbacken (42, 43) in Umfangsrichtung gegenüber den Armen (40̸, 41) der Antriebshebel (34, 45) entsprechend verschoben sind, d.h. die linke Preßbacke (42) im Uhrzeigersinn und die rechte Preßbacke (43) gegen den Uhrzeigersinn. Die Radien der Kreisbogenabschnitte der Preßflächen (44, 45, 55) gehen dabei von Mittelpunkten aus, die in den Spitzen eines gleichseitigen Dreieckes liegen.To use the pressing tool (31), the arms (38, 39) of the drive lever (34, 35) are first pressed together by hand, that is, contrary to the arrows E, F. As a result open the arms (40̸, 41) mouth-like and give a space between the end faces of the press jaws (42, 43) so that the press tool (31) can be pushed across a coupling sleeve (56) transversely to its longitudinal axis. After the coupling sleeve (56) has been placed against the pressing surface (55) of the abutment (54), the pressing jaws (42, 43) can be closed. This is done by spreading the lower arms (38, 39) of the drive lever (34, 35) with the help of the drive device, not shown. The press jaws (42, 43) then come to rest on the jacket of the coupling sleeve (56). Since the radii of the pressing surfaces (44, 45, 55) are smaller than the radius of the coupling sleeve (56) before the pressing by the intended insertion depth, the pressing surfaces (44, 45, 55) lie only with their outer transverse edges on the circumference of the coupling sleeve (56). So that there are gaps (57, 58, 59) of equal size between the end faces of the pressing jaws (42, 43) and the abutment (54), the scenes (52, 53) are shaped such that the pressing jaws (42, 43) in the circumferential direction relative to the arms (40̸, 41) of the drive lever (34, 45) are shifted accordingly, ie the left press jaw (42) clockwise and the right press jaw (43) counterclockwise. The radii of the circular arc sections of the pressing surfaces (44, 45, 55) start from centers which lie in the tips of an equilateral triangle.

Durch weitere Druckbeaufschlagung der Antriebseinrichtung werden die unteren Arme (38, 39) der Antriebshebel (34, 35) zusätzlich gespreizt. Dies hat zur Folge, daß die Preßbacken (42, 43) weiter nach innen bewegt werden, wobei die beiden Bewegungsrichtungen im wesentlichen einen Winkel von 60̸° einschließen, der symmetrisch zur Längsachse (33) liegt und sich vom Widerlager (54) weg öffnet. Dies beruht darauf, daß die Schwenkbolzen (36, 37) jeweils auf Geraden liegen, die vom Mittelpunkt des Kreisbogenabschnittes des Widerlagers (54) ausgehen und einen Winkel einschließen, der doppelt so groß ist, wie der von den Bewegungsrichtungen der Preßbacken (42, 43) eingeschlossene Winkel, nämlich 120̸°. Da sich beim Preßvorgang der obere Spalt (57) zwischen den Stirnflächen der Preßbacken (42, 43) schneller verkleinern würde als die Spalte zwischen den Preßbacken (42, 43) und dem Widerlager, (54) biegen die Kulissen (52, 53) nach innen derart nach unten ab, daß die Preßbacken (42, 43) relativ zu den Armen (40̸, 41) in Umfangsrichtung verschoben werden, und zwar die linke Preßbacke (42) entgegen dem Uhrzeigersinn und die rechte Preßbacke (43) im Uhrzeigersinn. Dabei ist die Führung in den Kulissen (52, 53) derart, daß die Spalte (57, 58, 59) während des gesamten Preßvorgangs gleich bleiben, bis die Stirnseiten der Preßbacken (42, 43) und des Widerlagers (54) am Preßende zur Anlage kommen. Dabei wird die Kupplungshülse (56) radial gestaucht und in ihrem Durchmesser um die gewünschte Einpreßtiefe verringert.By further pressurization of the drive device, the lower arms (38, 39) of the drive lever (34, 35) are additionally spread. As a result, the pressing jaws (42, 43) are moved further inwards, the two directions of movement essentially enclosing an angle of 60 °, which is symmetrical to the longitudinal axis (33) and opens away from the abutment (54). This is due to the fact that the pivot pins (36, 37) each lie on straight lines which start from the center point of the circular arc section of the abutment (54) and form an angle which is twice as large as that of the directions of movement of the press jaws (42, 43) included angles, namely 120 °. Since the upper gap (57) between the end faces of the pressing jaws (42, 43) would decrease faster than the gap between the pressing jaws (42, 43) and the abutment (54), the scenes (52, 53) bend afterwards downwards in such a way that the pressing jaws (42, 43) are displaced in the circumferential direction relative to the arms (40̸, 41), namely the left pressing jaw (42) counterclockwise and the right pressing jaw (43) clockwise. The guide in the scenes (52, 53) is such that the gaps (57, 58, 59) remain the same throughout the pressing process until the end faces of the press jaws (42, 43) and the abutment (54) at the end of the press Plant come. The coupling sleeve (56) is compressed radially and its diameter is reduced by the desired press-in depth.

Für das Entfernen des Preßwerkzeuges (31) von der Kupplungshülse (56) werden die unteren Arme (38, 39) des Antriebshebels (34, 35) wieder zusammengeschoben, so daß sich die oberen Arme (40̸, 41) maulartig öffnen. Das Preßwerkzeug (31) kann dann von der Kupplungshülse (56) abgezogen werden.To remove the pressing tool (31) from the coupling sleeve (56), the lower arms (38, 39) of the drive lever (34, 35) are pushed together again, so that the upper arms (40̸, 41) open like a mouth. The pressing tool (31) can then be removed from the coupling sleeve (56).

In den Figuren (5) und (6) ist ein Preßwerkzeug (61) - ebenfalls nur teilweise - dargestellt, wobei dieses Preßwerkzeug (61) große Ähnlichkeit mit dem in den Figuren (3) und (4) dargestellten Preßwerkzeug (31) hat. Es weist ein innen hohles Werkzeuggehäuse (62) auf, das sich nach unten hin für die Aufnahme eines Antriebes und zum Zweck der Handhabung verlängert, was hier nicht näher dargestellt ist.In the figures (5) and (6) a pressing tool (61) - also only partially - is shown, this pressing tool (61) being very similar to the pressing tool (31) shown in Figures (3) and (4). It has an internally hollow tool housing (62) which extends downwards for receiving a drive and for the purpose of handling, which is not shown here.

In dem Werkzeuggehäuse (62) sind spiegelbildlich zur Längsachse (63) zwei Antriebshebel (64, 65) um sich senkrecht zur Zeichnungsebene erstreckende Schwenkbolzen (66, 67) verdrehbar gelagert. Die nach unten zeigenden Arme (68, 69) der Antriebshebel (64, 65) werden zum Verschwenken in den Richtungen der Pfeile I, J gespreizt, und zwar gegen die Wirkung einer hier nicht näher dargestellten, die unteren Arme (68, 69) zusammenziehenden Feder. Zum Spreizen der Arme (68, 69) wird ein Druckrollenpaar verwendet, wie dies schon zu dem Preßwerkzeug (31) in den Figuren (3) und (4) beschrieben ist.Two drive levers (64, 65) are mounted in the tool housing (62) as a mirror image of the longitudinal axis (63) so that they can rotate about pivot bolts (66, 67) extending perpendicular to the plane of the drawing. The downward-pointing arms (68, 69) of the drive levers (64, 65) are spread for pivoting in the directions of arrows I, J, against the action of a lower arm, not shown here (68, 69) contracting spring. A pair of pressure rollers is used to spread the arms (68, 69), as has already been described for the pressing tool (31) in FIGS. (3) and (4).

In den von den Schwenkbolzen (66, 67) nach oben sich erstreckenden Armen (70̸, 71) der Antriebshebel (64, 65) sind Preßbacken (72, 73) aufgenommen. Sie weisen jeweils innenseitige Preßflächen (74, 75) auf, die jeweils sich über 120̸° erstreckende Kreisabschnitte bilden. Beide Preßbacken (72, 73) sind an den oberen Armen (70̸, 71) der Antriebshebel (64, 65) in den Umfangsrichtungen gemäß den Doppelpfeilen K, L beweglich gelagert. Hierzu liegen Sie mit Ihren Außenseiten an entsprechenden, kreisbogenförmigen Führungsflächen (76, 77) in den Armen (70̸, 71) an, welche koaxial zu den Kreisbogenabschnitten der jeweiligen Preßflächen (74, 75) verlaufen.Press jaws (72, 73) are received in the arms (70̸, 71) of the drive levers (64, 65) which extend upwards from the pivot bolts (66, 67). They each have inside pressing surfaces (74, 75) which each form circular sections extending over 120 °. Both press jaws (72, 73) are movably mounted on the upper arms (70̸, 71) of the drive lever (64, 65) in the circumferential directions according to the double arrows K, L. For this purpose, you lie with your outer sides on corresponding, circular arc-shaped guide surfaces (76, 77) in the arms (70̸, 71), which run coaxially to the circular arc sections of the respective pressing surfaces (74, 75).

Die Preßbacken (72, 73) weisen an ihren äußeren Umfängen Einkerbungen (78, 79) auf, in die in den oberen Armen (70̸, 71) axial verschieblich gelagerte Stifte (80̸, 81) einfassen. Diese Stifte (80̸, 81) sind über Druckfedern (82, 83) in Richtung auf die Einkerbungen (78, 79) federbeaufschlagt. Die Stifte (80̸, 81) und die Einkerbungen (78, 79) sind dabei so angeordnet, daß die Stifte (80̸, 81) bestrebt sind, die Preßbacken (72, 73) in Umfangsrichtung gegeneinander zu bewegen, also die linke Preßbacke (74) im Uhrzeigersinn und die rechte Preßbacke (73) gegen den Uhrzeigersinn. Hier nicht näher dargestellte Anschläge sorgen dafür, daß die Preßbacken (72, 73) über ein gewisses Maximalmaß hinaus nicht weiter in diesen beiden Richtungen bewegt werden können. Selbstverständlich ist die Führung der Preßbacken (72, 73) so beschaffen, daß diese nicht aus den Aufnahmen der Arme (70̸, 71) nach innen fallen, d.h. es ist eine entsprechende Zwangsführung vorgesehen.The pressing jaws (72, 73) have notches (78, 79) on their outer circumferences, into which pins (80̸, 81) which are axially displaceably mounted in the upper arms (70̸, 71). These pins (80̸, 81) are spring-loaded via compression springs (82, 83) in the direction of the notches (78, 79). The pins (80̸, 81) and the notches (78, 79) are arranged so that the pins (80̸, 81) strive to move the press jaws (72, 73) against each other in the circumferential direction, i.e. the left press jaw (74 ) clockwise and the right press jaw (73) counterclockwise. Stops not shown here ensure that the press jaws (72, 73) cannot be moved beyond these to a certain maximum extent in these two directions. Of course, the guidance of the press jaws (72, 73) is such that they do not fall inwards from the receptacles of the arms (70̸, 71), i.e. a corresponding forced operation is provided.

Eine weitere Preßbacke wird von einem Widerlager (84) gebildet, das ortsfest innerhalb des Werkzeuggehäuses (62) angeordnet ist und obenseitig eine Preßfläche (85) aufweist, welche sich als über 120̸° erstreckender Kreisbogenabschnitte ausgebildet ist. Der Kreisbogenabschnitt hat den selben Radius wie diejenigen der übrigen Preßflächen (74, 75).Another press jaw is formed by an abutment (84) which is arranged in a stationary manner within the tool housing (62) and on the top side has a pressing surface (85) which is designed as a circular arc section extending over 120 °. The circular arc section has the same radius as that of the other pressing surfaces (74, 75).

Für den Gebrauch des Preßwerkzeuges (61) werden zunächst die unteren Arme (68, 69) der Antriebshebel (64, 65) von Hand zusammengedrückt, also entgegen den Pfeilen I, J. Hierdurch öffnen sich die oberen Arme (70̸, 71) maulartig und geben zwischen den Stirnseiten der Preßbacken (72, 73) einen Raum frei, so daß das Preßwerkzeug (61) über eine Kupplungshülse (86) quer zu deren Längsachse geschoben werden kann. Nach Anlage der Kupplungshülse (86) an der Preßfläche (85) des Widerlagers (84) können die Preßbacken (72, 73) durch Spreizen der unteren Arme (68, 69) mit Hilfe der hier nicht näher dargestellten Antriebseinrichtung geschlossen werden. Die Preßbacken (72, 73) kommen dann an dem Mantel der Kupplungshülse (86) zur Anlage. Da die Radien der Preßflächen (74, 75, 85) um die vorgesehene Einpreßtiefe kleiner sind als der Radius der Kupplungshülse (86) vor dem Verpressen, liegen die Preßflächen (74, 75, 85) nur mit ihren äußeren Querkanten auf dem Umfang der Kupplungshülse (86) an.For the use of the pressing tool (61), the lower arms (68, 69) of the drive lever (64, 65) are first pressed together by hand, that is, contrary to the arrows I, J. This opens the upper arms (70̸, 71) mouth-like and give space between the end faces of the press jaws (72, 73) so that the press tool (61) can be pushed transversely to its longitudinal axis via a coupling sleeve (86). After the coupling sleeve (86) has been placed on the pressing surface (85) of the abutment (84), the pressing jaws (72, 73) can be closed by spreading the lower arms (68, 69) with the aid of the drive device (not shown here). The press jaws (72, 73) then come to rest on the jacket of the coupling sleeve (86). Since the radii of the pressing surfaces (74, 75, 85) are smaller than the radius of the coupling sleeve (86) before the pressing by the intended insertion depth, the pressing surfaces (74, 75, 85) lie only with their outer transverse edges on the circumference of the coupling sleeve (86).

Damit zwischen den Stirnseiten der Preßbacken (72, 73) und des Widerlagers (84) gleichgroße Spalte (87, 88, 89) entstehen, sind die Anschläge für die Begrenzung der Bewegung der Preßbacken (72, 73) in Umfangsrichtung entsprechend angeordnet. Die Radien der Kreisbogenabschnitte der Preßflächen (74, 75, 85) gehen dabei von Mittelpunkten aus, die in den Spitzen eines gleichseitigen Dreiecks liegen.So that gaps (87, 88, 89) of the same size are formed between the end faces of the pressing jaws (72, 73) and the abutment (84), the stops for limiting the movement of the pressing jaws (72, 73) are arranged correspondingly in the circumferential direction. The radii of the circular arc sections of the pressing surfaces (74, 75, 85) start from centers which lie in the tips of an equilateral triangle.

Durch weitere Druckbeaufschlagung der Antriebseinrichtung werden die unteren Arme (68, 69) der Antriebshebel (64, 65) zusätzlich gespreizt. Dies hat zur Folge, daß die Preßbacken (72, 73) weiter nach innen bewegt werden, wobei die beiden Bewegungrichtungen im wesentlichen einen Winkel von 60̸° einschließen, der symmetrisch zur Längsachse (63) liegt und sich vom Widerlager (84) weg öffnet. Auch hier beruht dies darauf, daß die Schwenkbolzen (66, 67) jeweils auf Geraden liegen, die vom Mittelpunkt des Kreisbogenabschnittes des Widerlagers (84) ausgehen und einen Winkel von 120̸° einschließen.By further pressurization of the drive device, the lower arms (68, 69) of the drive lever (64, 65) are additionally spread. The result of this is that the press jaws (72, 73) are moved further inwards, the two directions of movement being essentially at an angle of 60 ° enclose, which is symmetrical to the longitudinal axis (63) and opens away from the abutment (84). Here too, this is based on the fact that the pivot pins (66, 67) each lie on straight lines that start from the center point of the circular arc section of the abutment (84) and enclose an angle of 120 °.

Beim Preßvorgang verschieben sich die Preßbacken (72, 73) relativ zu den oberen Armen (70̸, 71) selbstätig in Umfangsrichtung, und zwar die linke Preßbacke (72) entgegen dem Uhrzeigersinn und die rechte Preßbacke (73) im Uhrzeigersinn. Es hat sich gezeigt, daß die Spalte (87, 88, 89) auch bei dieser Ausführungsform trotz der nicht exakten Führung während des gesamten Preßvorgangs im wesentlichen gleich bleiben, bis die Stirnseiten der Preßbacken (72, 73) und des Widerlagers (84) am Preßende zu Anlage kommen, wie dies in Figur (6) zu sehen ist. Dabei wird die Kupplungshülse (86) radial gestaucht und in ihrem Durchmesser um die gewünschte Einpreßtiefe verringert.During the pressing process, the pressing jaws (72, 73) move automatically in the circumferential direction relative to the upper arms (70̸, 71), namely the left pressing jaw (72) counterclockwise and the right pressing jaw (73) clockwise. It has been shown that the gaps (87, 88, 89) remain essentially the same in this embodiment despite the inaccurate guidance during the entire pressing process until the end faces of the pressing jaws (72, 73) and the abutment (84) on Press end come to rest, as can be seen in Figure (6). The coupling sleeve (86) is compressed radially and its diameter is reduced by the desired press-in depth.

In den Figuren (7) und (8) sind zwei Preßwerkzeuge (91, 92) dargestellt, und zwar jeweils hälftig. Auf der zur Symmetrieachse linken Hälfte der Figuren (7) und (8) ist das Preßwerkzeug (91) und auf der jeweils rechten Hälfte das Preßwerkzeug (92) gezeigt. Beide Preßwerkzeuge (91, 92) sind spiegelsymmetrisch ausgebildet, so daß sich ihr Aufbau schon aus der Darstellung ihrer Hälften ergibt.In the figures (7) and (8) two pressing tools (91, 92) are shown, each in half. The pressing tool (91) is shown on the left half of the figures (7) and (8) with respect to the axis of symmetry and the pressing tool (92) is shown on the right half. Both pressing tools (91, 92) are mirror-symmetrical, so that their structure results from the representation of their halves.

Das in den linken Hälften der Figuren (7) und (8) dargestellte Preßwerkzeug (91) weist einen Preßring (93) auf, der aus insgesamt drei Preßbacken (94, 95) besteht, wobei wegen der halbseitigen Darstellung die Preßbacke (94) nur teilweise und eine Preßbacke - nämlich die rechte - überhaupt nicht zu sehen sind. An der oberen Preßbacke (94) ist mittels einer Schraube (96) ein aus Federstahl bestehendes, biegsames Zugband (97) befestigt, das sich über den Umfang der oberen Preßbacke (94) und der linken Preßbacke (95) erstreckt. Ein entsprechendes Zugband verläuft zur anderen, hier nicht dargestellten Seite des Preßrings (93).The pressing tool (91) shown in the left halves of the figures (7) and (8) has a pressing ring (93) which consists of a total of three pressing jaws (94, 95), the pressing jaw (94) only because of the half-sided representation partially and a press jaw - namely the right one - cannot be seen at all. A flexible drawstring (97) made of spring steel is fastened to the upper press jaw (94) by means of a screw (96) and extends over the circumference of the upper press jaw (94). and the left press jaw (95) extends. A corresponding tension band runs to the other side of the press ring (93), not shown here.

Die unteren Preßbacken (95) sind in Umfangsrichtung K verschieblich an den Zugbändern (97) geführt. Jeweils eine Gummifeder (98) faßt in Ausnehmungen in den gegenüberliegenden Stirnseiten der Preßbacken (94, 95) ein und ist an diesen anvulkanisiert. In unbelastetem Zustand werden die Preßbacken (94, 95) durch die Gummifedern (98) um ein bestimmtes Maß auseinandergedrückt, so daß sich zwischen den gegenüerliegenden Stirnseiten der Preßbacken (94, 95) Spalte (99, 10̸0̸) gleicher Breite ergeben, wenn die Preßbacken (94, 95) außenseitig auf einer Kupplungshülse (10̸1) anliegen.The lower press jaws (95) are displaceable in the circumferential direction K on the tension bands (97). In each case a rubber spring (98) surrounds in recesses in the opposite end faces of the press jaws (94, 95) and is vulcanized onto them. In the unloaded state, the press jaws (94, 95) are pushed apart by the rubber springs (98) by a certain amount, so that there are gaps (99, 10̸0̸) of the same width between the opposite end faces of the press jaws (94, 95) when the press jaws (94, 95) rest on the outside on a coupling sleeve (10̸1).

An den freien Enden der Zugbänder (97) sind außenseitig Kupplungsansätze (10̸2) angebracht. An diesen Kupplungsansätzen (10̸2) kann eine hier nur schematisch und strichpunktiert dargestellte Antriebseinrichtung (10̸3) angesetzt werden, die von dem Preßring (93) getrennt ist. Das Preßwerkzeug (91) besteht also aus zwei unabhängigen Teilen, die miteinander gekuppelt werden können.Coupling lugs (10bänder2) are attached to the outside of the free ends of the drawstrings (97). A drive device (10̸3), which is only shown schematically and in broken lines here, can be attached to these coupling attachments (10̸2) and is separated from the press ring (93). The pressing tool (91) thus consists of two independent parts that can be coupled together.

Die Antriebseinrichtung (10̸3) weist zwei Antriebshebel (10̸4) auf, von denen hier nur der linke zu sehen ist. Sie sind um senkrecht zur Zeichnungsebene sich erstreckende Schwenkbolzen (10̸5) verdrehbar gelagert. Ihre nach unten zeigenden Arme (10̸6) werden zum Verschwenken in Richtung des Pfeils L gespreizt, und zwar gegen die Wirkung einer hier nicht näher dargestellten, die unteren Arme (10̸6) zusammenziehenden Feder. Zum Spreizen der Arme (10̸6) wird ein Druckrollenpaar verwendet, wie dies schon zu dem Preßwerkzeug (31) in den Figuren (3) und (4) beschrieben ist. Die sich von den Schwenkbolzen (10̸5) nach oben erstreckenden Arme (10̸7) sind so geformt, daß sie die Kupplungsansätze (10̸2) hinterfassen können.The drive device (10̸3) has two drive levers (10̸4), of which only the left one can be seen here. They are rotatably mounted about pivot bolts (10̸5) extending perpendicular to the plane of the drawing. Your downward-pointing arms (10̸6) are spread for pivoting in the direction of arrow L, against the action of a spring, not shown here, which contracts the lower arms (10̸6). A pair of pressure rollers is used to spread the arms (10̸6), as has already been described for the pressing tool (31) in Figures (3) and (4). The arms (10̸7) extending upwards from the pivot bolts (10̸5) are shaped in such a way that they can reach behind the coupling projections (10̸2).

Beim Gebrauch des Preßwerkzeuges (91) wird zunächst der Preßring (93) geöffnet, so daß die unteren Preßbacken (95) nach außen wegstehen, wie dies strichpunktiert dargestellt ist. Der Preßring (93) kann dann über die Kombination aus Kupplungshülse (10̸1) und Rohrende (10̸8) quer zu deren Längsachse geschoben werden. Auf Grund der Federwirkung der Zugbänder (97) legen sich die Preßbacken (94, 95) am Umfang der Kupplungshülse (10̸1) an, und zwar auch hier nur mit den äußeren Querkanten. Dann wird die Antriebseinrichtung (10̸3) derart angesetzt, daß die oberen Arme (10̸7) der Antriebshebel (10̸4) die Kupplungsansätze (10̸2) außenseitig hinterfassen, wie sich dies aus Figur (7) ersehen läßt. Die Antriebshebel (10̸4) werden dann in der vorbeschriebenen Weise gespreizt, so daß die Zugbänder (97) an ihren freien Enden zusammengedrückt werden. Dies hat zur Folge, daß die Kupplungshülse (10̸1) und das Rohrende (10̸8) radial gestaucht werden, wobei sich die unteren Preßbacken (95) selbsttätig in Umfangsrichtung verschieben, und zwar die linke untere Preßbacke (95) im Uhrzeigersinn und die rechte untere Preßbacke entgegen dem Uhrzeigersinn. Dies geschieht solange, bis die Stirnseiten der Preßbacken (94, 95) untereinander zur Anlage kommen, wobei die Gummifedern (98) komprimiert werden. Diese Situation ist in Figur (8) dargestellt.When using the pressing tool (91), the pressing ring (93) is first opened, so that the lower pressing jaws (95) protrude outwards, as shown in broken lines. The press ring (93) can then be pushed across the combination of coupling sleeve (10̸1) and pipe end (10̸8) transversely to its longitudinal axis. Due to the spring action of the drawstrings (97), the press jaws (94, 95) rest on the circumference of the coupling sleeve (10̸1), even here only with the outer transverse edges. Then the drive device (10̸3) is set in such a way that the upper arms (10̸7) of the drive lever (10̸4) grasp the coupling attachments (10̸2) on the outside, as can be seen from FIG. (7). The drive lever (10̸4) are then spread in the manner described above, so that the drawstrings (97) are pressed together at their free ends. This has the consequence that the coupling sleeve (10̸1) and the pipe end (10̸8) are radially compressed, the lower press jaws (95) automatically shifting in the circumferential direction, namely the left lower press jaw (95) clockwise and the right lower press jaw counter clockwise. This continues until the end faces of the pressing jaws (94, 95) come into contact with one another, the rubber springs (98) being compressed. This situation is shown in Figure (8).

Das Preßwerkzeug (92) ist funktionsmäßig ähnlich ausgebildet wie das Preßwerkzeug (91). Es hat ebenfalls einen Preßring (10̸9), der drei Preßbacken (110̸, 111) gleicher Bogenlänge aufweist. Die obere Preßbacke (110̸) ist fest an einem Preßbackenträger (112) angeordnet, während die beiden unteren Preßbacken (111) in Umfangsrichtung verschieblich an Preßbackenträgern (113) geführt sind. Die unteren Preßbackenträger (113) sind über Schwenkgelenke (114) an dem oberen Preßbackenträger (112) angelenkt.The press tool (92) is functionally similar to the press tool (91). It also has a press ring (10̸9), which has three press jaws (110̸, 111) of the same arc length. The upper press jaw (110̸) is fixedly arranged on a press jaw support (112), while the two lower press jaws (111) are displaceably guided in the circumferential direction on the press jaw supports (113). The lower press jaw carriers (113) are articulated on the upper press jaw carriers (112) via swivel joints (114).

Die unteren Preßbacken (111) weisen an ihren äußeren Umfängen Einkerbungen (115) auf, in die in den unteren Preßbackenträgern (113) axial verschieblich gelagerte Stifte (116) einfassen. Diese Stifte (116) sind über Druckfedern (117) in Richtung auf die Einkerbungen (115) federbeaufschlagt. Die Stifte (116) und die Einkerbungen (115) sind dabei so angeordnet, daß die Stifte (116) bestrebt sind, die unteren Preßbacken (111) in Umfangsrichtung gegeneinander zu bewegen, also die dargestellte rechte untere Preßbacke (111) im Uhrzeigersinn und die hier nicht dargestellte Preßbacke gegen den Uhrzeigersinn. Hier nicht näher gezeigte Anschläge sorgen dafür, daß die unteren Preßbacken (113) über ein gewisses Maximalmaß hinaus nicht weiter in diesen beiden Richtungen bewegt werden können.The lower press jaws (111) have notches (115) on their outer circumferences, into which pins (116), which are axially displaceably mounted, engage in the lower press jaw carriers (113). These pins (116) are spring-loaded via compression springs (117) in the direction of the notches (115). The pins (116) and the notches (115) are arranged so that the pins (116) endeavor to move the lower press jaws (111) against each other in the circumferential direction, i.e. the right lower press jaw (111) shown clockwise and the Press jaw, not shown here, counterclockwise. Stops not shown here ensure that the lower press jaws (113) cannot be moved further in these two directions beyond a certain maximum dimension.

An den freien Enden der unteren Preßbackenträger (113) sind senkrecht zur Zeichnungsebene vorstehende Antriebsbolzen (118) angeordnet, die die Funktion der Kupplungsansätze (10̸2) bei dem Preßwerkzeug (91) übernehmen. An diese Antriebsbolzen (118) kann die in der linken Hälfte der Figuren (7) und (8) dargestellte Antriebseinrichtung (10̸3) angesetzt werden, indem die oberen Arme (10̸7) der Antriebshebel (10̸4) an den Außenseiten der Antriebsbolzen (118) angelegt werden.At the free ends of the lower press jaw supports (113) projecting drive bolts (118) are arranged perpendicular to the plane of the drawing, which take over the function of the coupling lugs (10-2) in the pressing tool (91). The drive device (10̸3) shown in the left half of the figures (7) and (8) can be attached to these drive bolts (118) by placing the upper arms (10̸7) of the drive levers (10̸4) on the outer sides of the drive bolts (118) will.

Das Preßwerkzeug (92) wird in der gleichen Weise gehandhabt wie das Preßwerkzeug (91). Zunächst wird der Preßring (10̸9) über die Kupplungshülse (10̸1) und das Rohrende (10̸8) quer zu deren Längsachse geschoben, wobei die beiden unteren Preßbackenträger (113) geöffnet, d. h. nach außen geschwenkt sind, wie dies strichpunktiert angedeutet ist. Danach werden die unteren Preßbackenträger (113) an dem Außenumfang der Kupplungshülse (10̸1) zur Anlage gebracht. Die vorerwähnten Anschläge zur Begrenzung der Bewegung der unteren Preßbacken (111) in Umfangsrichtung sind so angeordnet, daß sich bei Anlage an der Kupplungshülse (10̸1) gleich große Spalte (119, 120̸) zwischen den Stirnseiten der Preßbacken (110̸, 111) ergeben.The pressing tool (92) is handled in the same way as the pressing tool (91). First, the press ring (10̸9) is pushed over the coupling sleeve (10̸1) and the pipe end (10̸8) transversely to its longitudinal axis, the two lower press jaw carriers (113) being opened, i.e. H. are pivoted outwards, as is indicated by dash-dotted lines. The lower press jaw carriers (113) are then brought into contact with the outer circumference of the coupling sleeve (10̸1). The abovementioned stops for limiting the movement of the lower press jaws (111) in the circumferential direction are arranged in such a way that gaps (119, 120̸) of the same size between the end faces of the press jaws (110̸, 111) result when the coupling sleeve (10 Kupplungs1) is in contact.

Durch weitere Spreizung der unteren Arme (10̸6) der Antriebshebel (10̸4) werden die unteren Preßbacken (113) nach innen verschwenkt, wobei sich die unteren Preßbacken (111) selbsttätig in Umfangsrichtung M verschieben, und zwar die dargestellte rechte Preßbacke (111) entgegen dem Uhrzeigersinn und die linke, hier nicht dargestellte Preßbacke im Uhrzeigersinn. Dies geht solange, bis die Stirnseiten der Preßbacken (110̸, 111) am Preßende zur Anlage kommen. Dieser Zustand ist in der rechten Hälfte der Figur (8) zu sehen.By further spreading the lower arms (10̸6) of the drive lever (10̸4), the lower press jaws (113) are pivoted inwards, the lower press jaws (111) automatically move in the circumferential direction M, namely the right press jaw (111) shown counterclockwise and the left press jaw, not shown here, clockwise. This continues until the end faces of the press jaws (110̸, 111) come to rest at the end of the press. This state can be seen in the right half of the figure (8).

Das Preßwerkzeug (92) unterscheidet sich kinematisch und damit prinzipiell nicht von dem Preßwerkzeug gemäß den Figuren (5) und (6) und auch von dem Preßwerkzeug (31) gemäß den Figuren (3) und (4), denn auch bei diesen Preßwerkzeugen (61, 31) könnte die Preßbewegung der Preßbacken (72, 73) bzw. (42, 43) dadurch bewirkt werden, daß die als Preßbackenträger fungierenden oberen Arme (70̸, 71) bzw. (40̸, 41) der Antriebshebel (64, 65) bzw. (34, 35) im Bereich der oberen Spalte (87) bzw. (57) zusammengezogen werden, indem eine entsprechend ausgebildete, separate Antriebseinrichtung angesetzt wird. In diesem Fall könnte auf die unteren Arme (68, 69) bzw. (38, 39) der Antriebshebel (64, 65) bzw. (34, 35) verzichtet werden.The pressing tool (92) differs kinematically and therefore in principle not from the pressing tool according to the figures (5) and (6) and also from the pressing tool (31) according to the figures (3) and (4), because even with these pressing tools ( 61, 31) the pressing movement of the pressing jaws (72, 73) or (42, 43) could be brought about by the fact that the upper arms (70̸, 71) or (40̸, 41) of the drive levers (64, 65 ) or (34, 35) in the area of the upper column (87) or (57) can be contracted by attaching a suitably designed, separate drive device. In this case, the lower arms (68, 69) or (38, 39) of the drive lever (64, 65) or (34, 35) could be dispensed with.

Selbstverständlich können die Preßwerkzeuge (91, 92) auch einteilig ausgebildet sein, d. h. die Antriebseinrichtung (10̸3) über ein entsprechendes Gehäuseteil mit einem der Preßbacken (94, 95, 110̸, 111) verbunden sein. In diesem Fall wäre diese Preßbacke (94, 95, 110̸, 111) vergleichbar mit den Widerlagern (4, 54, 84) in den Ausführungsbeispielen nach den Figuren (1) bis (6). Dabei kann auch eine der unteren Preßbacken (95, 111) die ortsfest am Preßwerkzeug (91, 92) angeordnete, die Funktion des Widerlagers ausübende Preßbacke (95, 111) sein. In diesem Fall bedarf es nur eines Antriebshebels (10̸4) zum Zusammenziehen der Preßbacken (94, 95, 110̸, 111).Of course, the pressing tools (91, 92) can also be formed in one piece, i. H. the drive device (10̸3) can be connected to one of the press jaws (94, 95, 110̸, 111) via a corresponding housing part. In this case, this press jaw (94, 95, 110̸, 111) would be comparable to the abutments (4, 54, 84) in the exemplary embodiments according to the figures (1) to (6). One of the lower pressing jaws (95, 111) can also be the pressing jaw (95, 111) which is arranged in a fixed position on the pressing tool (91, 92) and performs the function of the abutment. In this case, only one drive lever (10̸4) is required to pull the press jaws (94, 95, 110̸, 111) together.

Claims (23)

Preßwerkzeug, insbesondere zum Verbinden von rohrförmigen Werkstücken, mit mehr als zwei bogenförmigen Preßbacken, die derart relativ zueinander beweglich sind, daß sie zum Aufsetzen auf das Werkstück öffenbar sind und daß sie sich zum Preßende hin zu einem geschlossenen Preßraum ergänzen, sowie mit wenigstens einer Antriebseinrichtung zur Bewegung von Preßbacken in Preßrichtung,
dadurch gekennzeichnet, daß eine der Preßbacken (4, 10̸, 11; 42, 43, 54; 72, 73, 84, 94; 95; 110̸, 111) als ein am Werkstück ansetzbares Widerlager (4, 54, 84, 94, 110̸) ausgebildet ist und die übrigen Preßbacken (10̸, 11; 42, 43; 72, 73, 95, 111) mittels der bzw. den Antriebseinrichtung(en) bewegbar und dabei derart geführt sind, daß sie sich beim Preßvorgang jeweils in Richtung auf den Mittelpunkt des Preßraumes in geschlossenem Zustand des Preßwerkzeuges (1, 31, 61, 91, 92) bewegen.Press tool, in particular for connecting tubular workpieces, with more than two arcuate press jaws which are movable relative to one another in such a way that they can be opened for placement on the workpiece and that they complement one another towards the end of the press to form a closed press space, and with at least one drive device for moving press jaws in the press direction,
characterized in that one of the press jaws (4, 10̸, 11; 42, 43, 54; 72, 73, 84, 94; 95; 110̸, 111) as an abutment (4, 54, 84, 94, 110̸ that can be attached to the workpiece) ) is formed and the other press jaws (10̸, 11; 42, 43; 72, 73, 95, 111) can be moved by means of the drive device (s) and are guided in such a way that they each move in the direction of the Move the center of the press chamber when the press tool (1, 31, 61, 91, 92) is closed. Preßwerkzeug nach Anspruch 1,
dadurch gekennzeichnet, daß die Preßbacken (4, 10̸, 11; 42, 43, 54; 72, 73, 84; 94, 95; 110̸, 111) derart beweglich zueinander geführt sind, daß ihre jeweils benachbart gegenüberliegenden Stirnflächen zu Preßbeginn gleiche Abstände haben.Press tool according to claim 1,
characterized in that the pressing jaws (4, 10̸, 11; 42, 43, 54; 72, 73, 84; 94, 95; 110̸, 111) are movably guided in relation to one another in such a way that their respective opposite end faces have the same spacing at the beginning of the pressing . Preßwerkzeug nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß die Preßbacken (4, 10̸, 11; 42, 43, 54; 72, 73, 84; 94, 95; 110̸, 111) in Umfangsrichtung gleichlang ausgebildet sind.Press tool according to claim 1 or 2,
characterized in that the pressing jaws (4, 10̸, 11; 42, 43, 54; 72, 73, 84; 94, 95; 110̸, 111) in the circumferential direction are equally trained. Preßwerkzeug nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß drei Preßbacken (4, 10̸, 11; 42, 43, 54; 72, 73, 84) vorgesehen sind und die Bewegungsrichtungen der beiden beweglichen Preßbacken (10̸, 11; 42, 43; 72, 73) einen Winkel von 60̸° einschließen, der symmetrisch zur Mittelsenkrechten auf das Widerlager (4, 54, 84) liegt und sich von diesem weggerichtet öffnet.Press tool according to one of claims 1 to 3,
characterized in that three press jaws (4, 10̸, 11; 42, 43, 54; 72, 73, 84) are provided and the directions of movement of the two movable press jaws (10̸, 11; 42, 43; 72, 73) form an angle of Include 60 °, which is symmetrical to the perpendicular to the abutment (4, 54, 84) and opens away from it. Preßwerkzeug nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß vier Preßbacken vorgesehen sind, wobei die Bewgungsrichtungen der beiden dem Widerlager benachbarten Preßbacken beim Preßvorgang einen Winkel von 90̸° einschließen, der symmetrisch zur Mittelsenkrechten auf das Widerlager liegt und sich von diesem weggerichtet öffnet.Press tool according to one of claims 1 to 3,
characterized in that four pressing jaws are provided, the directions of movement of the two pressing jaws adjacent to the abutment enclosing an angle of 90 ° during the pressing process, which lies symmetrically to the perpendicular to the abutment and opens away from it. Preßwerkzeug nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß das Widerlager als am freien Ende des Preßwerkzeuges befindlicher Widerlagerbügel (4) ausgebildet ist, der auf einer Seite schwenkbar gelagert ist und der an der gegenüberliegenden Seite lösbar bzw. verriegelbar ist.Press tool according to one of claims 1 to 5,
characterized in that the abutment is designed as an abutment bracket (4) located at the free end of the pressing tool, which is pivotally mounted on one side and which can be released or locked on the opposite side. Preßwerkzeug nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß die bewegbaren Preßbacken (10̸, 11) einerseits an deren Bewegungsrichtungen (C, D) vorgebenden Führungseinrichtungen (8, 9) und andererseits an einem in Richtung auf das Widerlager bewegbaren Preßstempel (18) anliegen, der mit der bzw. den Antriebseinrichtungen verbunden ist und an dem die dem Widerlager (4) benachbarten Preßbacken (10̸, 11) verschiebbar gelagert sind.Press tool according to one of claims 1 to 6,
characterized in that the movable press jaws (10̸, 11) on the one hand rest against their direction of movement (C, D) guiding devices (8, 9) and on the other hand on a movable press die (18) in the direction of the abutment, which with or Drive devices is connected and on which the abutment (4) adjacent pressing jaws (10̸, 11) are slidably mounted. Preßwerkzeug nach Anspruch 7,
dadurch gekennzeichnet, daß zwischen den zum Preßstempel (18) verschiebbaren Preßbacken (10̸, 11) eine weitere Preßbacke am Preßstempel (18) anliegt oder mit diesem verbunden ist, die dem Widerlager (4) gegenübersteht.Press tool according to claim 7,
characterized in that between the press ram (18) displaceable press jaws (10̸, 11) a further press jaw rests on the press ram (18) or is connected to it, which faces the abutment (4). Preßwerkzeug nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet, daß jede bewegliche Preßbacke mit einer eigenen Antriebseinrichtung versehen ist.Press tool according to one of claims 1 to 8,
characterized in that each movable press jaw is provided with its own drive device. Preßwerkzeug nach einem der Ansprüche 1 bis 6 oder 9,
dadurch gekennzeichnet, daß die Antriebseinrichtungen als in der jeweiligen Bewegungseinrichtung wirksame Preß- oder Zugstempel ausgebildet sind.Press tool according to one of claims 1 to 6 or 9,
characterized in that the drive devices are designed as press or tension punches effective in the respective movement device. Preßwerkzeug nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß zumindest ein Teil der beweglichen Preßbacken (42, 43; 72, 73) an Schwenkhebeln (34, 35; 64, 65) sitzt, die über die Antriebseinrichtung(en) verschwenkbar sind.Press tool according to one of claims 1 to 6,
characterized in that at least some of the movable pressing jaws (42, 43; 72, 73) are seated on pivoting levers (34, 35; 64, 65) which can be pivoted via the drive device (s). Preßwerkzeug nach Anspruch 11,
dadurch gekennzeichnet, daß die Schwenkhebel (34, 35; 64, 65) ortsfest am Preßwerkzeug (31, 61) gelagert sind.Press tool according to claim 11,
characterized in that the swivel levers (34, 35; 64, 65) are fixed in position on the pressing tool (31, 61). Preßwerkzeug nach Anspruch 11 oder 12,
dadurch gekennzeichnet, daß die Preßbacken an Preßbackenträgern sitzen, die an den Schwenkhebeln verschwenkbar gelagert sind.Press tool according to claim 11 or 12,
characterized in that the press jaws are seated on press jaw supports which are pivotally mounted on the pivot levers. Preßwerkzeug nach Anspruch 13,
dadurch gekennzeichnet, daß zur Steuerung der Bewegung der Preßbackenträger eine Kulissenführung vorgesehen ist.Press tool according to claim 13,
characterized in that a link guide is provided for controlling the movement of the press jaw carriers. Preßwerkzeug nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß das Widerlager (94, 110̸) Teil eines Preßrings (93, 10̸9) mit gelenkartig verbundenen Preßbacken (95; 111) ist, der zwischen zwei Preßbacken 95; 111) offen ist, wobei der Preßring (93, 10̸9) mittels der bzw. den Antriebseinrichtungen (10̸3) schließbar ist.Press tool according to one of claims 1 to 5,
characterized in that the abutment (94, 110̸) is part of a press ring (93, 10̸9) with articulated press jaws (95; 111) which is between two press jaws 95; 111) is open, the press ring (93, 10̸9) being closable by means of the drive device (s) (10̸3). Preßwerkzeug nach Anspruch 15,
dadurch gekennzeichnet, daß die Anbtriebseinrichtung(en) (10̸3) an den freien Enden des Preßrings (93, 10̸9) angreift bzw. angreifen.Press tool according to claim 15,
characterized in that the drive device (s) (10̸3) acts on the free ends of the press ring (93, 10̸9). Preßwerkzeug nach Anspruch 15 oder 16,
dadurch gekennzeichnet, daß die Antriebseinrichtung(en) (10̸3) von dem Preßring (93, 10̸6) getrennt ist bzw. sind und die Antriebseinrichtung(en) (10̸3) und der Preßring (93, 10̸9) Kupplungselemente (10̸2, 10̸5, 118) aufweisen, über die sie miteinander in Wirkverbindung bringbar sind.Press tool according to claim 15 or 16,
characterized in that the drive device (s) (10̸3) is or are separate from the press ring (93, 10̸6) and the drive device (s) (10̸3) and the press ring (93, 10̸9) coupling elements (10̸2, 10̸5, 118) have over which they can be brought into operative connection. Preßwerkzeug nach einem der Ansprüche 15 bis 17,
dadurch gekennzeichnet, daß der Preßring (93) wenigstens ein außenseitig an zumindest den bewegbaren Preßbacken (95) anliegendes Zugband (97) aufweist, über das bzw. die die Preßbacken (94, 95) zusammenbewegbar sind.Press tool according to one of claims 15 to 17,
characterized in that the press ring (93) has at least one tension band (97) on the outside against at least the movable press jaws (95), by means of which the press jaws (94, 95) can be moved together. Preßbacken nach Anspruch 18,
dadurch gekennzeichnet, daß zwei Zugbänder (97) vorgesehen sind, die im Bereich der freien Enden des Preßrings (93) zusammenziehbar sind.Press jaws according to claim 18,
characterized in that two tension bands (97) are provided which can be contracted in the region of the free ends of the press ring (93). Preßbacken nach einem der Ansprüche 1 bis 19,
dadurch gekennzeichnet, daß zumindest ein Teil der Preßbacken (42, 43; 72, 73; 94, 95; 111) in Preßbackenträgern (40̸, 41; 70̸, 71; 97; 113) relativ zu diesen bewegbar geführt ist, wobei Führungseinrichtungen (50̸, 52, 53, 54) für diese Preßbacken (42, 43; 72, 73; 94, 111) dergestalt vorgesehen sind, daß deren stirnseitigen Abstände zu Beginn des Preßvorgangs gleich sind.Press jaws according to one of claims 1 to 19,
characterized in that at least a part of the press jaws (42, 43; 72, 73; 94, 95; 111) is guided movably in press jaw carriers (40̸, 41; 70̸, 71; 97; 113), guide devices (50̸ , 52, 53, 54) for these press jaws (42, 43; 72, 73; 94, 111) are provided in such a way that their end distances are the same at the beginning of the pressing process. Preßwerkzeug nach Anspruch 20̸,
dadurch gekennzeichnet, daß die Preßbacken (42, 43; 72, 73; 95; 111) im wesentlichen in Umfangsrichtung beweglich geführt sind.Press tool according to claim 20̸,
characterized in that the pressing jaws (42, 43; 72, 73; 95; 111) are guided so that they can move substantially in the circumferential direction. Preßbacken nach Anspruch 21,
dadurch gekennzeichnet, daß die Führungseinrichtungen (50̸ bis 53) eine Kulissenführung aufweisen.Press jaws according to claim 21,
characterized in that the guide devices (50̸ to 53) have a link guide. Preßwerkzeug nach Anspruch 21,
dadurch gekennzeichnet, daß die Führungseinrichtungen eine gegen Anschläge gerichtete Federbeaufschlagung (78 bis 83; 98; 115 bis 117) aufweisen.Press tool according to claim 21,
characterized in that the guide means have a spring action directed against stops (78 to 83; 98; 115 to 117).
EP91105662A 1990-04-12 1991-04-10 Press tool Expired - Lifetime EP0451806B1 (en)

Priority Applications (2)

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EP94110654A EP0627273B1 (en) 1990-04-12 1991-04-10 Press tool
EP94110655A EP0628362B1 (en) 1990-04-12 1991-04-10 Press tool

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DE4011822 1990-04-12
DE4011822 1990-04-12

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EP94110655A Division EP0628362B1 (en) 1990-04-12 1991-04-10 Press tool
EP94110655.1 Division-Into 1994-07-08
EP94110654.4 Division-Into 1994-07-08

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EP0451806B1 EP0451806B1 (en) 1995-01-11

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EP91105662A Expired - Lifetime EP0451806B1 (en) 1990-04-12 1991-04-10 Press tool
EP94110654A Expired - Lifetime EP0627273B1 (en) 1990-04-12 1991-04-10 Press tool

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AT (4) ATE116880T1 (en)
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DE (5) DE9007414U1 (en)
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AU668620B2 (en) * 1992-12-02 1996-05-09 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Press tool
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WO1994012296A1 (en) * 1992-12-02 1994-06-09 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Press tool
WO1994012297A1 (en) * 1992-12-02 1994-06-09 Novopress Gmbh Pressen Und Presswerkzeuge & Co.Kg Pressing tool
EP0771615A1 (en) 1995-11-03 1997-05-07 Rothenberger Werkzeuge AG Crimping device for radially crimping tube connections
DE19543312A1 (en) * 1995-11-03 1997-05-15 Rothenberger Werkzeuge Masch Pressing device for the radial pressing of line connectors
DE29517518U1 (en) * 1995-11-04 1996-05-30 Novopress Gmbh Press tool
US6049962A (en) * 1995-11-04 2000-04-18 Novopress Gmbh Pressen Und Presswerkzeuge & Co., Kg Process for connecting a pipe with a press fitting and combination of press fitting, pipe and pressing device for implementing said process
DE19631019B4 (en) * 1996-02-09 2004-08-19 Novopress Gmbh Pressen Und Presswerkzeuge & Co Kg Pressing device
US6164106A (en) * 1996-02-09 2000-12-26 Novopress Gmbh Pressen Und Presserkzeuge & Co. Kg Press apparatus
DE19631019A1 (en) * 1996-02-09 1997-08-14 Novopress Gmbh Pressure unit esp. for connecting tube with fitting using at least two open dies
US6378194B1 (en) 1996-08-17 2002-04-30 Novopress Gmbh Method for joining workpieces, and pressing device therefor
DE29714753U1 (en) * 1996-08-17 1997-10-09 Novopress Gmbh Press device for connecting workpieces
DE19637608C1 (en) * 1996-09-16 1997-10-23 Novopress Gmbh Connection between pipe coupling and pipe end
EP0860221A2 (en) * 1997-02-21 1998-08-26 NOVOPRESS GMBH PRESSEN UND PRESSWERKZEUGE &amp; CO. KG. Pressing device
EP0860220A2 (en) * 1997-02-21 1998-08-26 NOVOPRESS GMBH PRESSEN UND PRESSWERKZEUGE &amp; CO. KG. Pressing device
US6240626B1 (en) 1997-02-21 2001-06-05 Novopress Gmbh Pressen Und Presswerkzauge & Co. Kg Pressing device
US6035775A (en) * 1997-02-21 2000-03-14 Novopres Gmbh Pressen Und Presswerkzeuge & Co. Kg Pressing device having a control device adapted to control the pressing device in accordance with a servocontrol system of the control device
EP0860223A2 (en) * 1997-02-21 1998-08-26 NOVOPRESS GMBH PRESSEN UND PRESSWERKZEUGE &amp; CO. KG. Pressing device for connecting workpieces
US6202290B1 (en) 1997-02-21 2001-03-20 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Pressing device for joining workpieces
EP0860222A2 (en) * 1997-02-21 1998-08-26 NOVOPRESS GMBH PRESSEN UND PRESSWERKZEUGE &amp; CO. KG. Pressing device and process for storing the press displacement or remaining press displacement
EP0860220A3 (en) * 1997-02-21 2000-07-26 NOVOPRESS GMBH PRESSEN UND PRESSWERKZEUGE &amp; CO. KG. Pressing device
EP0860221A3 (en) * 1997-02-21 2000-07-26 NOVOPRESS GMBH PRESSEN UND PRESSWERKZEUGE &amp; CO. KG. Pressing device
EP0860222A3 (en) * 1997-02-21 2000-07-26 NOVOPRESS GMBH PRESSEN UND PRESSWERKZEUGE &amp; CO. KG. Pressing device and process for storing the press displacement or remaining press displacement
EP0860223A3 (en) * 1997-02-21 2000-07-26 NOVOPRESS GMBH PRESSEN UND PRESSWERKZEUGE &amp; CO. KG. Pressing device for connecting workpieces
US6044681A (en) * 1997-03-11 2000-04-04 Gustav Klauke Gmbh Pressing tool
WO1998040178A1 (en) * 1997-03-11 1998-09-17 Gustav Klauke Gmbh Pressing tool
DE19734355C1 (en) * 1997-08-08 1999-04-08 Unicor Rohrsysteme Gmbh Pipe press tool
DE19734355C2 (en) * 1997-08-08 2002-08-14 Uponor Rohrsysteme Gmbh press tool
DE29721759U1 (en) * 1997-12-10 1998-04-09 Franz Viegener Ii Gmbh & Co Kg Press tool for the permanent connection of a fitting and an inserted metal pipe end
AU754451B2 (en) * 1998-10-02 2002-11-14 Hans Oetiker Ag Maschinen- Und Apparatefabrik Device for arranging, clamping or contracting a ring-shaped securing mechanism
WO2000020175A1 (en) * 1998-10-02 2000-04-13 Hans Oetiker Ag Maschinen- Und Apparatefabrik Device for arranging, clamping or contracting a ring-shaped securing mechanism
US6634202B1 (en) 1998-10-02 2003-10-21 Hans Oetiker Ag Maschinen-Und Apparatefabrik Device for arranging, clamping or contracting a ring shaped securing mechanism
EP0990490A1 (en) * 1998-10-02 2000-04-05 Hans Oetiker AG Maschinen- und Apparatefabrik Device for positioning, clamping and compacting a ring-shaped holder
DE19945113A1 (en) * 1999-09-21 2001-03-29 Novopress Gmbh Process for connecting a press fitting to a pipe and press fitting, pipe and pressing device for carrying out this process
WO2001021997A1 (en) 1999-09-21 2001-03-29 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Method for joining a crimped fitting and a pipe, crimped fitting, pipe and crimping device for carrying out said method
EP1498652A1 (en) 1999-09-21 2005-01-19 NOVOPRESS GMBH PRESSEN UND PRESSWERKZEUGE &amp; CO. KG. Process for connecting a press fitting with a tube and device for carrying out this process
DE10106363C1 (en) * 2001-02-12 2002-06-06 Rothenberger Werkzeuge Ag Pressing head for connecting pipe lines has double-armed lever tongs with pressure members mounted by oppositely acting parallelogram rod units whose articulation axes are each side
DE10237406A1 (en) * 2002-08-12 2004-03-11 Mapress Gmbh & Co. Kg press tool
DE202004007032U1 (en) * 2004-04-30 2005-09-15 Viega Gmbh & Co Kg Pressing tool for pipe fittings has two jaws with pressing element mounted movable between same and moving up to workpiece which is to be pressed to produce uniform pressing action
DE202006004876U1 (en) * 2006-03-28 2007-08-02 Herrle, Richard Pressing tool, press ring and pressing tongs
DE102007047339A1 (en) 2007-10-04 2009-04-09 Novartec Ag Pressing tool for pressing casing part and work piece i.e. fitting with pipe-ends, has pressing surfaces lying partially between die stocks, and die stocks connected with pressing units in detachable manner in middle area of surfaces

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ATE175599T1 (en) 1999-01-15
DE59109090D1 (en) 1999-02-25
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ES2067077T3 (en) 1995-03-16
EP0627273A3 (en) 1995-06-14
DK0451806T3 (en) 1995-05-22
ATE111385T1 (en) 1994-09-15
ATE167414T1 (en) 1998-07-15
EP0452791B1 (en) 1994-09-14
CA2040277A1 (en) 1991-10-13
ES2129089T3 (en) 1999-06-01
DE59102895D1 (en) 1994-10-20
ATE116880T1 (en) 1995-01-15
CA2040278A1 (en) 1991-10-13
CA2040277C (en) 2001-12-04
EP0452791A1 (en) 1991-10-23
DE59109014D1 (en) 1998-07-23
EP0628362A3 (en) 1995-06-14
DK0628362T3 (en) 1999-04-06
EP0627273A2 (en) 1994-12-07
ES2062596T3 (en) 1994-12-16
JPH0768329A (en) 1995-03-14
DE59104196D1 (en) 1995-02-23
JPH0768330A (en) 1995-03-14
DE59109090C5 (en) 2011-01-05
DE9007414U1 (en) 1991-07-18
DK0452791T3 (en) 1994-12-12
DK0627273T3 (en) 1999-09-06
US5148698A (en) 1992-09-22
EP0451806B1 (en) 1995-01-11
EP0627273B1 (en) 1999-01-13
EP0628362B1 (en) 1998-06-17
ES2119935T3 (en) 1998-10-16
EP0628362A2 (en) 1994-12-14
JP3334892B2 (en) 2002-10-15

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