EP0431418A2 - Dispositif de pliage de matériel en forme de barre non rotatif radialement - Google Patents

Dispositif de pliage de matériel en forme de barre non rotatif radialement Download PDF

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Publication number
EP0431418A2
EP0431418A2 EP90122387A EP90122387A EP0431418A2 EP 0431418 A2 EP0431418 A2 EP 0431418A2 EP 90122387 A EP90122387 A EP 90122387A EP 90122387 A EP90122387 A EP 90122387A EP 0431418 A2 EP0431418 A2 EP 0431418A2
Authority
EP
European Patent Office
Prior art keywords
bending
roller
swivel arm
crank
arm
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
EP90122387A
Other languages
German (de)
English (en)
Other versions
EP0431418A3 (en
EP0431418B1 (fr
Inventor
Heinz Ruhl
Helmut Zahlaus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT90122387T priority Critical patent/ATE97038T1/de
Publication of EP0431418A2 publication Critical patent/EP0431418A2/fr
Publication of EP0431418A3 publication Critical patent/EP0431418A3/de
Application granted granted Critical
Publication of EP0431418B1 publication Critical patent/EP0431418B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • 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
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
    • B21D11/12—Bending specially adapted to produce specific articles, e.g. leaf springs the articles being reinforcements for concrete

Definitions

  • the invention relates to a device for bending rod-shaped, essentially radially non-rotatable material, comprising a bending device comprising a bending roller and a crank roller, and a counter-holder for bending the material, which is part of a bending head of a bending pivot arm projecting from a stationary pivot bearing, which arm itself a journal with an axial bore for carrying the material in the pivot bearing and is pivotable about the longitudinal axis of the material, the material being movable along a bending plane of the bending pivot arm, in which the longitudinal axis of the material to be bent lies and the bending device can be actuated via a pressure medium drive unit , to which the pressure medium can be fed via bores or lines running in the longitudinal direction of the bending swivel arm and which are connected to circumferential chambers in a stationary section of the device.
  • a corresponding device for bending ring material can be found in US Pat. No. 4,782,684.
  • the material is unwound from a coil in order to be fed to the bending device after passing through a straightening station, which is arranged at the free end of a projecting bending swivel arm.
  • the bending device comprises two stationary bending rollers, to which a crank roller is rotatable to bend the material to the desired extent.
  • the cantilever bending arm itself can be pivoted clockwise and counterclockwise by a maximum of 360 °.
  • hydraulic fluid is guided in bores running in the longitudinal direction of the bending swivel arm, which are in turn connected to chambers which radially surround the bending swivel arm in a stationary part of the device and are connected to the bores.
  • This stationary unit is located outside the swivel bearing, which could result in disadvantages not only in terms of dimensions but also in terms of production technology and therefore economy. Due to the dimensioning of the bending head accommodating the bending device, it is not possible to bend 180 ° bends with a short leg to a spatial shape, provided that the short leg does not have a length of a multiple of the bending roll diameter.
  • the present invention is inter alia based on the problem of developing a device of the type described at the outset in such a way that the material can be bent into almost any spatial shape without difficulty, without the already bent material itself leading to a disability. It should also be possible to bend both different material and bending roll diameters with one and the same device without any problems. Finally, there should be the possibility of an exact detection and control of the bending angle without hindrance.
  • the problem is solved on the one hand essentially in that comprising the as a bending crank Bending roller with the bending roller, which is formed around this rotating roller roller and rotatable about the bending roller axis, can be rotated via a force transmission element, such as a displaceable toothed rack, which can be moved in the longitudinal direction of the bending pivot arm and which interacts with an intermediate gear, of which a rotatable element, such as a gear wheel, forms a preferably rigid unit with the bending crank.
  • a force transmission element such as a displaceable toothed rack
  • a toothed rack that itself is preferably the piston rod of a hydraulic cylinder acted upon by the pressure medium.
  • the power transmission element could also be a chain.
  • the bending crank causing the bending of the material is rotated with simple measures, whereby the intermediate gear ensures that when the toothed or piston rod is fully extended, it comes to rest with its free end in the region of the bending roller, so that consequently the drive does not result in an extension of the bending head, which limits the bending possibilities, and thus the cantilevered bending swivel arm.
  • the bending head with the bending roller-dependent bending crank is interchangeably connected to the bending swivel arm, preferably the interface between the gear interacting with the rack and a gear meshing with it.
  • the swivel radius of the bending swivel arm is approximately equal to the diameter of the bending roller plus that which is twice the diameter of the material.
  • the compact structural unit results in particular from the fact that the drive unit extends essentially along the axis of rotation x of the bending swivel arm and lies on the side of the bending arm facing away from the bending plane.
  • the cantilevered, overhung flexible swivel arm is consequently designed in its radial dimensions such that material can be bent into the bending plane, since the swivel radius of the flexible swivel arm and its end bending area itself is essentially only determined by the diameter of the bending roller.
  • the length of the cantilever arm also specifies the bending area in the bending plane in the direction of the pivot bearing at a maximum bending of 180 °. Consequently, surface and / or space bends can occur which can develop freely along and in front of the swivel arm without the pivoting of the bending swivel arm itself being hindered by curved material.
  • the swivel arm can be rotated by any angle about its longitudinal axis, so that consequently any position can be defined as a zero position from which it can be bent and the swivel arm can be rotated clockwise and counterclockwise.
  • the device according to the invention consequently does not have the limitation in the pivoting movement known from the prior art.
  • the hydraulic cylinder is supplied via the radial encircling chambers embedded in the pivot bearing, which are open towards the bearing journal and sealed laterally with respect to it, with holes being provided in the bearing journal in the region of the chambers, which are connected to the hydraulic cylinder via e.g. Holes or lines are connected.
  • the piston is moved in the cylinder, so that the fluid displaced by the piston movement can flow out on the chamber not supplied with fluid.
  • the chambers preferably run between ball bearings, by means of which the bearing journal is supported with respect to the stand.
  • the fluid flow is used to control or detect the angular position of the bending roller or of a bending crank receiving it.
  • an oil flow meter with an angle of rotation pulse generator is essentially used, which detects and displays the respective angular position of the bending crank in proportion to the flow rate of the fluid actuating the hydraulic cylinder. Since the quantity of measurement oil and the quantity of oil output are the same, the oil flow meter can be arranged in an oil supply line in which the drive output is transmitted simultaneously with control data. This makes it possible to keep the bending swivel arm free of rotating power or control lines, which otherwise lead to a hindrance and limit the swiveling movement.
  • the measure which enables the control or detection of the angular position of the bending roller is also to be used independently of the device according to the invention, so that the relevant development is to be given independent protection.
  • a device for straightening and bending ring material is shown purely schematically.
  • the device comprises a stand or a swivel bearing housing (2) from which a flexible swivel arm (1) extends.
  • the bending swivel arm (1) is designed as a cantilever arm, which is supported via a shaft end or pin (23) in a swivel bearing (32) via ball bearings (33).
  • the bending crank (3) is rotated via a crankshaft (29) of a bending drive, which comprises meshing gears of an intermediate gear and a toothed piston rod (22) acting thereon, which extends in a longitudinal direction of the bending swivel arm (1) extending hydraulic cylinder (34) in the manner described below is displaceable (see Fig. 11).
  • a counter-holder (6) is arranged on the bending pivot arm (1), which protrudes from the bending plane (H).
  • This bending plane (H) is predetermined by a surface of the bending swivel arm (1), into which material (8) to be bent runs and from which the crank roller (4) and the bending roller (5) protrude.
  • the projecting bending swivel arm (1) can be rotated about the longitudinal axis (X) of the material (8).
  • swivel gearwheels (27) mesh with one another, one of which stems from the shaft end (23) and the other from a swivel drive (9) which is fastened to the stator housing (2).
  • the projecting bending swivel arm (1) is now dimensioned such that its swiveling radius (r) is approximately equal to the diameter of the bending roller (5) plus twice the diameter of the material (8). This results in the possibility of carrying out room bends without the bending swivel arm (1) leading to an obstruction (see also FIGS. 3, 4, 5 and 6).
  • the distance (q) between the material axis and the flat surface (13) of the bending arm (1), which preferably has the shape of a half cylinder, along which curved material can be moved, should be at most twice the diameter of the Of rod material (8) to prevent permanent deformation.
  • the cantilevered swivel arm (1) is rotated about its longitudinal axis (X) by the intermeshing swivel gearwheels (27), which coincides with that of the directional material (8) to be bent.
  • a pivoting of the bending crank (3) and thus the crank roller (4) around the bending roller (5) takes place by means of the hydraulic cylinder (34) and the piston which can be displaced therein.
  • the fluid line (a) or the fluid line (b) is optionally pressurized in order to supply either the cylinder space (21) or the cylinder space (20) with the fluid, as a result of which the piston rod (22) moves, the maximum of which Stroke w is. This ensures that at maximum stroke the free end of the piston rod (22) does not protrude beyond the bending roller (5), so that consequently the space bending process cannot be impaired.
  • the piston rod (22) extending in the longitudinal direction of the bending swivel arm (1) with the hydraulic cylinder (34) receiving it is dimensioned such that no parts have the swivel radius (r) protrude outwards, so that the bending process or the bent material cannot be hindered as a result.
  • the exchangeable bending crank (3) can be regarded as a further characteristic feature of the invention. Since there is inevitably a change in dimension V, i.e. the distance of the material axis X from the axis of rotation of the bending roller (5) and the positions of the crank roller (4) and the counter-holder (6), with different material diameters and / or bending roller diameters, the invention proposes that this unit consisting of a bending crank (3) and counter-holder (6) is designed to be replaceable as a bending head (14).
  • the line (k) illustrates a cutting line that indicates the dividing line between the bending head (14) and the bending swivel arm (1).
  • the intersection line (k) runs between the toothed wheel (40) meshing with the toothed rack (22), which remains on the bending arm (1), and the toothed wheel (42) meshing with the toothed wheel (42) forming a rigid unit with the crankshaft (29) (41).
  • the interface separates the drive unit from the bending head (14), so that lines pressurized with pressure medium and control lines or the like. do not need to be separated.
  • Fig. 11 illustrates once again that the rack (22) located at the top in the exemplary embodiment meshes along the path (w) with the gear (40) located below, as a result of which the Bending crank (3) to the extent necessary about the axis of the gear (42) or the crankshaft (29) and thus about the bending roller (5) can be pivoted.
  • the rack (22) is extended, the front end lies in the area of the crank (5) and therefore does not protrude from the front of the crank, so that the rack (22) does not obstruct the bending process on the end.
  • the intermediate gear consisting of the gear wheels (40), (41) and (42) in the exemplary embodiment can of course also comprise other transmission means and / or a different number of gear wheels.
  • the fluid is supplied to the annular chambers (18) and (19) and thus to the lines (36), (37) connected to the cylinder (34) via the oil line (b) in which an oil flow meter (24) is arranged, which in turn actuates an angle encoder (25). Consequently, depending on the flow rate, the respective angular position (z) of the bending crank (3) can be read on the angle transmitter (25) or on a display device controlled by it.
  • the construction of the device according to the invention opens up the possibility that the bending swivel arm (1) can assume any position with respect to its axis of rotation (x). This clearly shows the advantage that the material to be bent can be bent in any spatial direction, depending on the position of the bending plane. 7, 8, 9 and 10 show four different positions of the bending plane, the bending direction, which is predetermined by the pivoting of the crank roller (4) around the bending roller (5), being identified by the reference symbol (10).
  • the material (8) has been bent by pivoting the crank roller around the bending roller (5) by 180 ° in the bending plane (H), so that the bent leg runs parallel to the unbent material (8).
  • the material is first shifted to the right in the drawing, as can be seen in FIG. 4.
  • the bending crank is pivoted back into the starting position, as is illustrated in FIGS. 3 and 4.
  • the bending swivel arm (1) is rotated by 90 ° to the plane (H) as shown in FIG.
EP90122387A 1989-11-27 1990-11-23 Dispositif de pliage de matériel en forme de barre non rotatif radialement Expired - Lifetime EP0431418B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90122387T ATE97038T1 (de) 1989-11-27 1990-11-23 Vorrichtung zum biegen von stabfoermigem radial nicht drehbarem material.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3939128A DE3939128A1 (de) 1989-11-27 1989-11-27 Vorrichtung zum biegen von stabfoermigem radial nicht drehbarem material
DE3939128 1989-11-27

Publications (3)

Publication Number Publication Date
EP0431418A2 true EP0431418A2 (fr) 1991-06-12
EP0431418A3 EP0431418A3 (en) 1991-08-21
EP0431418B1 EP0431418B1 (fr) 1993-11-10

Family

ID=6394246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90122387A Expired - Lifetime EP0431418B1 (fr) 1989-11-27 1990-11-23 Dispositif de pliage de matériel en forme de barre non rotatif radialement

Country Status (4)

Country Link
EP (1) EP0431418B1 (fr)
AT (1) ATE97038T1 (fr)
DE (2) DE3939128A1 (fr)
ES (1) ES2047806T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4002127A1 (de) * 1990-01-25 1991-08-01 Tracto Technik Biegemaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3373587A (en) * 1966-12-08 1968-03-19 Shubin Vladimir Nikolaevich Automatic tube bending machines
EP0209876A2 (fr) * 1985-07-22 1987-01-28 BLM S.p.A. Machine à cintrer universelle et procédé de cintrage correspondant
EP0281488A1 (fr) * 1987-02-17 1988-09-07 Eaton Leonard Picot S.A. Tête de cintrage tournante, pour machine à cintrer les tubes
US4782684A (en) * 1986-05-07 1988-11-08 Benton Ronald E Bending machine
DE3811891A1 (de) * 1988-04-09 1989-06-15 Semmlinger Werner Vorrichtung zum biegen von strangmaterial

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3373587A (en) * 1966-12-08 1968-03-19 Shubin Vladimir Nikolaevich Automatic tube bending machines
EP0209876A2 (fr) * 1985-07-22 1987-01-28 BLM S.p.A. Machine à cintrer universelle et procédé de cintrage correspondant
US4782684A (en) * 1986-05-07 1988-11-08 Benton Ronald E Bending machine
EP0281488A1 (fr) * 1987-02-17 1988-09-07 Eaton Leonard Picot S.A. Tête de cintrage tournante, pour machine à cintrer les tubes
DE3811891A1 (de) * 1988-04-09 1989-06-15 Semmlinger Werner Vorrichtung zum biegen von strangmaterial

Also Published As

Publication number Publication date
ES2047806T3 (es) 1994-03-01
ATE97038T1 (de) 1993-11-15
EP0431418A3 (en) 1991-08-21
DE59003458D1 (de) 1993-12-16
EP0431418B1 (fr) 1993-11-10
DE3939128A1 (de) 1991-05-29

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