EP2308611A1 - Device for bending elongate workpieces - Google Patents
Device for bending elongate workpieces Download PDFInfo
- Publication number
- EP2308611A1 EP2308611A1 EP10010436A EP10010436A EP2308611A1 EP 2308611 A1 EP2308611 A1 EP 2308611A1 EP 10010436 A EP10010436 A EP 10010436A EP 10010436 A EP10010436 A EP 10010436A EP 2308611 A1 EP2308611 A1 EP 2308611A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bending
- tool
- tool carrier
- axis
- tube
- 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
Links
- 238000005452 bending Methods 0.000 title claims abstract description 174
- 238000003825 pressing Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000003860 storage Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012999 compression bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000013000 roll bending Methods 0.000 description 1
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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
- B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
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- 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
- B21D7/021—Construction of forming members having more than one groove
Definitions
- the invention relates to a device for bending elongate workpieces, such as pipes, extruded profiles or metal wire.
- Tube bending machines are known for different applications.
- different bending methods can be used.
- press bending the bending tool is pressed manually or hydraulically against two counter rollers. This movement forces the workpiece positioned between the bending tool and the counter-roller (s) to bend about the bending tool. Since the pipes can not be supported from the inside, this method is usually suitable only for thick-walled pipes and large bending radii.
- Three-roll bending is used to make workpieces with large bending radii. The process is similar to press bending, but the work rolls rotate as well as the two stationary counter rolls and thereby form the bend radius.
- compression bending the tube is clamped between a sliding carriage and a stationary bending roller.
- the workpiece is in this case fixed between a stationary bending roller and a clamping arm arranged on a pivoting arm and deformed by pivoting of the pivoting arm including the clamping jaw about the axis of rotation of the bending roller.
- a first pipe section with a first bending radius is to be bent by a first rotation angle
- a subsequent pipe section with a second bending radius is to be bent by a second rotation angle
- a first pipe section "to the right” and the subsequent pipe section "to the left” may be bent.
- One way to do this is to rotate the tube itself by 180 ° relative to the bending tool after a first bending operation, so that it is bent in the opposite direction in a subsequent bending operation.
- space problems may arise because considerable freedom must be created on both sides of the tube bending machine, in which the already bent part of the tube can extend.
- a tube bending machine which makes it possible to bend a tube with different bending radii and to the right and to the left without the tube in this case would have to be rotated by 180 ° relative to the bending tool.
- This pipe bending machine comprises a base frame, on which the unbent portion of a pipe to be bent is fixed. The fixation is such that the tube can be advanced by means of a carriage and rotated by a rotating device about a defined angle about the longitudinal axis of the unbent portion of the tube.
- the pipe bending machine further comprises a tool carrier with a plurality of bending tools.
- the tool carrier is connected to the base carrier via a carrier slide, the base carrier allowing a horizontal displacement of the tool carrier relative to the tube to be bent and consequently perpendicular to the longitudinal axis of the unbent portion of the tube.
- the tool carrier itself is rotatably connected about an axis, which is aligned parallel to the longitudinal axis of the unbent portion of the tube, connected to the carrier carriage, wherein rotation takes place, if necessary, by means of an electric motor.
- the bending tools comprise two bending roller units each having two bending rollers of different diameters, wherein the two bending roller units are fixed on opposite sides with respect to the axis of rotation of the tool carrier on a common axis.
- one of the four bending rollers can be brought into contact with the section of the tube to be bent. Then arranged on the pivot arm clamping jaws and slides are moved up to the tube and the tube thereby fixed between the jaw and the bending roller, so that upon pivoting of the pivot arm of the corresponding portion of the tube is bent around the bending roller.
- the concrete in the EP 1 226 887 B1 revealed construction a pipe bending machine thus allows bending to the right and bending to the left, each with two different bending radii.
- This deflection is reinforced by the arrangement of several bending rollers one above the other in a bending roller unit due to the increasing distance to the storage. Too large a deflection can prevent sufficient clamping of the workpiece between the bending roller and the jaw.
- the dimensioning of the axle in particular, be designed so generously that the deflection of the bending roller units remains within a tolerable range due to the bending moment generated by the clamping jaws.
- this increases the manufacturing cost.
- the present invention seeks to provide an improved device for bending elongated workpieces, in particular with respect to the EP 1 226 887 B1 known tube bending machine has increased stability in the bending roller.
- the core of the invention is in a bending device in which a bending roller or a bending roller unit (permanently) is mounted only on one side, a temporary (ie taking place during the bending process) to produce two-sided storage by a retaining element is provided, the - directly or indirectly releasably connected to the free end of the bending roller or the axis carrying the bending roller is connected and that in particular the pressure forces, which arise by pressing the clamping jaw or a sliding shoe against the workpiece or the bending roller itself, supported.
- a device for bending elongated workpieces accordingly has a base support, a tool carrier connected to the base support and at least one bending tool, wherein the bending tool has at least one bending roller, which is rotatable about an axis, mounted on one side on the tool carrier, and wherein the bending tool a clamping jaw arranged on the clamping tool, by means of which the workpiece can be pressed against the bending roller.
- at least one retaining element which is releasably connected to the free one, i. unsupported end of the bending roller or the axis carrying the bending roller is connectable, so that a bending moment generated by the pressing of the workpiece is supported by the holding element.
- the rotatability of the bending roller about the axis can be realized in any manner, for example, in which the bending roller (rotating) is fixedly mounted on an axle and the axis is rotatably mounted in a corresponding bearing of the tool carrier.
- the bending roller and the axle can also represent an integrated component.
- the axis can also be integrated (rotationally) fixedly in the tool carrier and the bending roller can be mounted rotatably on the axle.
- the holding element may preferably be formed so that it comprises a Haitestrebe which is fastened with a first end to the tool carrier or connected to the tool carrier pivot arm and whose second end is connectable to the free end of the bending roller or the axle.
- the releasable connection between the holding element or, the retaining strut and the bending roller or the axis can preferably be realized by this is attached to a protruding end pin of the axis.
- connection between the holding strut and the tool carrier or the swivel arm can preferably be designed to be pivotable, whereby the optionally required for a kauslein loosening of the retaining element required mobility can be effected.
- a connection between the retaining strut and the axis of the bending roll by attaching to an end pin should be given a certain lateral mobility. If this mobility is realized via a corresponding connection between the holding strut and the tool carrier or the swivel arm by means of a joint, the connecting / releasing the holding strut can be done by the axis of the bending roller without considerable effort.
- the holding element has at least two holding struts, of which at least one is connected to the tool carrier and at least one other with the pivot arm, but both are detachably connectable to the free end of the axle.
- a bending device which additionally has a sliding shoe.
- Such a shoe the structure and function of which is well known in the art, is regularly arranged on the inlet side next to the clamping jaw and bears directly against the workpiece to be bent. During the bending operation, the part of the workpiece located in the area of the sliding shoe moves relative to the sliding block. The shoe serves to prevent unwanted lateral deformation in this area.
- the holding element according to the invention can be used particularly advantageously in such bending devices that allow left-right bending and / or Mehrradienbiegen, as in these bending devices constructively and functionally regularly only one-sided mounting of the bending roller or bending roller unit is provided and in a Mehrradienbiegen due the majority of each other arranged bending rollers results in a large distance between the outermost bending roller and the storage.
- a bending device which allows a left-right bending by at least two bending tools are provided, one of which can be brought by a rotation of the tool carrier about a rotation axis in engagement with the workpiece to be bent, is preferably for each of the bending tools a corresponding Holding element provided.
- the bending device shown in the figures comprises a base support 1, which is shown schematically in the figures in the form of a cuboid.
- a drive unit 2 is provided, in which a tube 3 to be bent is fixed.
- the drive unit 2 comprises an electric motor (not shown) with which the tube 3 to be bent can be rotated about the longitudinal axis of the unbent portion of the tube.
- the drive unit also comprises a linear drive (not shown), which makes it possible to move it, including the tube 3 to be bent in the direction of the longitudinal axis of the non-bent portion of the tube 3 relative to the base support 1.
- a tool carrier 4 of the bending device comprises a main body 5, a vertically oriented bending tool axis 6 and a pivot arm 7, which can be pivoted relative to the main body 5 about the bending tool axis 6.
- a bending roller unit 8 of a bending tool is arranged, each having three sections of different diameters, which serve as a bending template and define the bending radius of the respective bending operation.
- Each of the bending tools further comprises a clamping jaw 9, which is arranged displaceably on the pivot arm 7 and in a position in which it rests against the respective bending roller unit 8, the tube located therebetween 3 clamped with a defined clamping force.
- each of the bending tools comprises a slide, which in the illustrated position of the pivot arm 7 directly adjacent to the respective clamping jaw 9 stationary on the Base body 5 is attached. In the figures, the slide rails are covered by the clamping jaws 9.
- the tool carrier 4 is fixed via a displacement unit 10 on a side surface of the base support 1.
- the displacement unit 10 comprises two linear drives 11 a, 11 b, each of a carriage 12 a, 12 b, two linear guides 13 a, 13 b and a drive, not shown (eg hydraulic or pneumatic cylinder, electric motor spindle drive, rack and pinion linear drive, etc.) consist.
- the two parallel rail systems comprehensive linear guides 13a, 13b of the linear actuators 11a, 11b are aligned at an angle of 90 ° to each other, the linear guide 13a of the first linear actuator 11a horizontally and the linear guide 13b of the second linear actuator 11b is vertically aligned.
- the tool carrier 4 including the associated bending tools in a plane which is aligned perpendicular to the longitudinal axis of the unbent portion of the tube 3, are continuously displaced.
- the displacement of the tool carrier 4 relative to the base support 1 or to the fixed to the base support 1 tube 3 is allowed to position the bending tool located in the operating position so that the section to be bent of the tube 3 in the desired bending radius corresponding Bending template of the respective bending roller unit 8 is located.
- the Fig. 1 shows how the portion of the tube 3 to be bent between the bending radius of the smallest bending radius forming the located in the operating position bending roller unit 8 and the clamping jaw 9 of this bending tool is fixed.
- a rotation of the tool carrier 4 by 180 ° about an axis of rotation, which is aligned parallel to the longitudinal axis of the unbent portion of the tube 3, the previously located in the operating position bending tool placed in a parking position and the previously located in the parking position bending tool are converted according to the operating position.
- a rotation of the tool carrier can, for example, by means of an electric motor (not shown) take place, which drives a shaft (not shown) which is rotatably connected to the tool carrier and rotatably mounted in a corresponding mounting of the base support.
- the illustrated bending device has holding elements which serve to support a bending moment, which is caused by the pressing of the clamping jaws 9 and the sliding blocks on the bending roll units or the pipe.
- the holding elements comprise two cross members 14a, 14b, of which a first cross member 14a is arranged in vertical alignment on the main body 5 of the tool carrier 4 and a second cross member 14b is arranged laterally on the pivot arm 7 in vertical alignment.
- the two ends of the two cross members 14a, 14b extend beyond the corresponding portion of the tool carrier or the pivot arm so far that they end in the amount of the exposed end pin of the bending tool axis 6.
- a support strut 15 is articulated by means of a simple pivot, the length of which is dimensioned so that it extends to the end pin of the bending tool axis 6.
- the free ends of the retaining struts 15 are provided with openings whose inner diameter substantially corresponds to the outer diameter of the end pins of the bending tool axis 6.
- the free ends of the retaining struts 15 are attached to the end pin, wherein the two connected to the pivot arm 7 retaining struts 15 first and only subsequently connected to the main body 5 holding struts 15 are attached , In principle, it is also possible to perform this order in opposite directions.
- the arrangement of the holding struts 15 connected to the swivel arm 7 below the other holding struts 15 has been taken into account by a correspondingly shortened configuration of the second cross member 14b compared to the first cross member 14a, so that a substantially horizontal alignment is achieved for all holding struts 15.
- the Fig. 1 shows the bending device according to the invention just before performing a bending operation.
- the section of the tube 3 to be bent is clamped between the bending roller unit 8 in the operating position and the corresponding clamping jaw 9.
- the retaining struts 15 are attached to the end pin of the bending tool axis 6.
- the pressure forces exerted by the clamping jaws 9 on the bending roll units 8 would be supported by the holding struts 15 connected to the pivot arm 7, while the reaction forces caused by a pressing of the tube 3 to the respective shoe during the bending process, would be supported by the stationary connected to the base support 5 holding struts 15.
- the Fig. 2 shows, however, a malfunction of the bending device during a change from right bending to left bending.
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zum Biegen länglicher Werkstücke, wie beispielsweise Rohre, Strangprofile oder Metalldraht.The invention relates to a device for bending elongate workpieces, such as pipes, extruded profiles or metal wire.
Rohrbiegemaschinen sind für unterschiedliche Anwendungszwecke bekannt. Hierbei können unterschiedliche Biegeverfahren zum Einsatz kommen. Beim so genannten Pressbiegen wird das Biegewerkzeug manuell oder hydraulisch gegen zwei Gegenrollen gepresst. Diese Bewegung zwingt das zwischen dem Biegewerkzeug und der oder den Gegenrollen positionierte Werkstück zur Biegung um das Biegewerkzeug. Da die Rohre nicht von innen gestützt werden können, ist dieses Verfahren in der Regel nur für dickwandige Rohre und große Biegeradien geeignet. Drei-Rollen-Biegen wird angewendet, um Werkstücke mit großen Biegeradien herzustellen. Das Verfahren ist dem Pressbiegen ähnlich, doch rotieren die Arbeitswalzen sowie die beiden stationären Gegenwalzen und formen dadurch den Biegeradius. Beim Kompressionsbiegen ist das Rohr zwischen einem Gleitschlitten und einer stationären Biegerolle geklemmt. Durch eine Rotation des Gleitschlittens um die Biegerolle wird das Rohr auf den Radius der Biegerolle gebogen. Wesentlich vielseitiger und präziser als die zuvor genannten Verfahren ist das Rotationszugbiegen. Das Werkstück wird hierbei zwischen einer stationären Biegerolle und einer an einem Schwenkarm angeordneten Spannbacke fixiert und durch ein Verschwenken des Schwenkarms einschließlich der Spannbacke um die Rotationsachse der Biegerolle umgeformt.Tube bending machines are known for different applications. In this case, different bending methods can be used. In so-called press bending, the bending tool is pressed manually or hydraulically against two counter rollers. This movement forces the workpiece positioned between the bending tool and the counter-roller (s) to bend about the bending tool. Since the pipes can not be supported from the inside, this method is usually suitable only for thick-walled pipes and large bending radii. Three-roll bending is used to make workpieces with large bending radii. The process is similar to press bending, but the work rolls rotate as well as the two stationary counter rolls and thereby form the bend radius. During compression bending, the tube is clamped between a sliding carriage and a stationary bending roller. By rotating the slide around the bending roller, the tube is bent to the radius of the bending roller. Much more versatile and precise than the aforementioned methods is the Rotationszugbiegen. The workpiece is in this case fixed between a stationary bending roller and a clamping arm arranged on a pivoting arm and deformed by pivoting of the pivoting arm including the clamping jaw about the axis of rotation of the bending roller.
Für das Rohrbiegen kommt es zunehmend darauf an, Rohrbiegemaschinen zu entwickeln, die es erlauben, aufeinanderfolgende Abschnitte des zu verformenden Rohrs in unterschiedlicher Weise zu biegen. So kann beispielsweise vorgesehen sein, dass ein erster Rohrabschnitt mit einem ersten Biegeradius um einen ersten Rotationswinkel gebogen werden soll, während ein nachfolgender Rohrabschnitt mit einem zweiten Biegeradius um einen zweiten Rotationswinkel zu biegen ist. Weiterhin kann es erforderlich sein, dass ein erster Rohrabschnitt "nach rechts" und der danach folgende Rohrabschnitt "nach links" gebogen werden soll. Eine Möglichkeit hierzu besteht darin, das Rohr nach einem ersten Biegevorgang selbst relativ zu dem Biegewerkzeug um 180° zu verdrehen, so dass dieses in einem darauffolgenden Biegevorgang in entgegengesetzter Richtung gebogen wird. Hierdurch können sich jedoch Platzprobleme ergeben, da auf beiden Seiten der Rohrbiegemaschine erhebliche Freiräume geschaffen werden müssen, in die sich der bereits gebogene Teil des Rohrs erstrecken kann.For tube bending, it is increasingly important to develop tube bending machines that allow bending successive sections of the tube to be deformed in different ways. For example, it may be provided that a first pipe section with a first bending radius is to be bent by a first rotation angle, while a subsequent pipe section with a second bending radius is to be bent by a second rotation angle. Furthermore, it may be necessary that a first pipe section "to the right" and the subsequent pipe section "to the left" to be bent. One way to do this is to rotate the tube itself by 180 ° relative to the bending tool after a first bending operation, so that it is bent in the opposite direction in a subsequent bending operation. As a result, however, space problems may arise because considerable freedom must be created on both sides of the tube bending machine, in which the already bent part of the tube can extend.
Aus der
Als problematisch bei der Biegevorrichtung gemäß der
Ausgehend von diesem Stand der Technik lag der Erfindung die Aufgabe zugrunde, eine verbesserte Vorrichtung zum Biegen von länglichen Werkstücken anzugeben, die insbesondere gegenüber der aus der
Diese Aufgabe wird durch den Gegenstand des unabhängigen Patentanspruchs gelöst. Vorteilhafte Ausführungsformen der erfindungsgemäßen Biegevorrichtung sind Gegenstand der abhängigen Patentansprüche und ergeben sich aus der nachfolgenden Beschreibung der Erfindung.This object is solved by the subject matter of the independent claim. Advantageous embodiments of the bending device according to the invention are the subject of the dependent claims and will become apparent from the following description of the invention.
Der Kern der Erfindung liegt darin, bei einer Biegevorrichtung, bei der eine Biegerolle oder eine Biegerolleneinheit (dauerhaft) nur einseitig gelagert ist, eine temporäre (d.h. während des Biegeprozesses erfolgende), beidseitige Lagerung herzustellen, indem ein Halteelement vorgesehen ist, das - direkt oder indirekt - lösbar mit dem freien Ende der Biegerolle oder der die Biegerolle tragenden Achse verbindbar ist und dass insbesondere die Druckkräfte, die durch das Andrücken der Spannbacke oder auch eines Gleitschuhs gegen das Werkstück oder die Biegerolle selbst entstehen, abstützt.The core of the invention is in a bending device in which a bending roller or a bending roller unit (permanently) is mounted only on one side, a temporary (ie taking place during the bending process) to produce two-sided storage by a retaining element is provided, the - directly or indirectly releasably connected to the free end of the bending roller or the axis carrying the bending roller is connected and that in particular the pressure forces, which arise by pressing the clamping jaw or a sliding shoe against the workpiece or the bending roller itself, supported.
Eine erfindungsgemäße Vorrichtung zum Biegen länglicher Werkstücke weist demnach einen Grundträger, einen mit dem Grundträger verbundenen Werkzeugträger und mindestens ein Biegewerkzeug auf, wobei das Biegewerkzeug mindestens eine Biegerolle aufweist, die, um eine Achse rotierbar, einseitig an dem Werkzeugträger gelagert ist, und wobei das Biegewerkzeug eine an dem Spannwerkzeug angeordnete Spannbacke aufweist, mittels der das Werkstück an die Biegerolle angedrückt werden kann. Erfindungsgemäß ist weiterhin mindestens ein Halteelement vorgesehen, das lösbar mit dem freien, d.h. nicht abgestützten Ende der Biegerolle oder der die Biegerolle tragenden Achse verbindbar ist, so dass ein durch das Andrücken des Werkstücks erzeugtes Biegemoment von dem Halteelement abgestützt wird.A device according to the invention for bending elongated workpieces accordingly has a base support, a tool carrier connected to the base support and at least one bending tool, wherein the bending tool has at least one bending roller, which is rotatable about an axis, mounted on one side on the tool carrier, and wherein the bending tool a clamping jaw arranged on the clamping tool, by means of which the workpiece can be pressed against the bending roller. According to the invention, there is further provided at least one retaining element which is releasably connected to the free one, i. unsupported end of the bending roller or the axis carrying the bending roller is connectable, so that a bending moment generated by the pressing of the workpiece is supported by the holding element.
Die Rotierbarkeit der Biegerolle um die Achse kann auf beliebige Weise realisiert werden, beispielsweise, in dem die Biegerolle (dreh)fest auf einer Achse befestigt ist und die Achse drehbar in einer entsprechenden Lagerung des Werkzeugträgers gelagert ist. Selbstverständlich kann die Biegerolle und die Achse dabei auch ein integriertes Bauteil darstellen. Alternativ kann die Achse auch (dreh)fest in den Werkzeugträger integriert sein und die Biegerolle drehbar auf der Achse gelagert sein.The rotatability of the bending roller about the axis can be realized in any manner, for example, in which the bending roller (rotating) is fixedly mounted on an axle and the axis is rotatably mounted in a corresponding bearing of the tool carrier. Of course, the bending roller and the axle can also represent an integrated component. Alternatively, the axis can also be integrated (rotationally) fixedly in the tool carrier and the bending roller can be mounted rotatably on the axle.
Das Halteelement kann vorzugsweise so ausgebildet sein, dass dieses eine Haitestrebe umfasst, die mit einem ersten Ende an dem Werkzeugträger oder einem mit dem Werkzeugträger verbundenen Schwenkarm befestigt ist und deren zweites Ende mit dem freien Ende der Biegerolle oder der Achse verbindbar ist. Hierdurch kann eine konstruktiv einfache und somit kostengünstige, aber dennoch stabile Ausgestaltung realisiert werden.The holding element may preferably be formed so that it comprises a Haitestrebe which is fastened with a first end to the tool carrier or connected to the tool carrier pivot arm and whose second end is connectable to the free end of the bending roller or the axle. In this way, a structurally simple and thus cost-effective, yet stable design can be realized.
Die lösbare Verbindung zwischen dem Halteelement bzw, der Haltestrebe und der Biegerolle beziehungsweise der Achse kann vorzugsweise dadurch realisiert werden, dass dieses/diese auf einen vorstehenden Endzapfen der Achse aufgesteckt wird. Dadurch wird in Kraftrichtung eine formschlüssige Verbindung realisiert, die einfach herstellbar ist sowie schnell geschlossen und wieder gelöst werden kann, gleichzeitig jedoch eine sichere und stabile Abstützung der Kräfte in ihrer Wirkungsrichtung, nämlich im wesentlichen quer zur Achse, sicherstellt.The releasable connection between the holding element or, the retaining strut and the bending roller or the axis can preferably be realized by this is attached to a protruding end pin of the axis. As a result, a positive connection is realized in the direction of force, which is easy to manufacture and can be quickly closed and released, but at the same time a secure and stable support of the forces in their direction of action, namely substantially transverse to the axis, ensures.
Im Wesentlichen die gleichen Vorteile lassen sich auch mit einer Verbindung realisieren, bei der ein Zapfen des Halteelements bzw. der Haltestrebe in eine korrespondierende Öffnung, z.B. Längsbohrung der Achse eingesteckt wird. Hierbei ist gegebenenfalls jedoch zu beachten, dass die Öffnung in der Achse deren Stabilität negativ beeinflussen kann.Essentially the same advantages can also be realized with a connection in which a journal of the retaining element or retaining strut is inserted into a corresponding opening, e.g. Longitudinal bore of the axle is inserted. However, if necessary, it should be noted that the opening in the axle can adversely affect their stability.
Die Verbindung zwischen der Haltestrebe und dem Werkzeugträger beziehungsweise dem Schwenkarm kann vorzugsweise schwenkbar ausgebildet sein, wodurch die gegebenenfalls für ein Verbindenlein Lösen des Halteelements erforderliche Beweglichkeit bewirkt werden kann. Beispielsweise sollte bei einer Verbindung zwischen der Haltestrebe und der Achse der Biegerolle durch Aufstecken auf einen Endzapfen eine gewisse seitliche Beweglichkeit gegeben sein. Sofern diese Beweglichkeit über eine entsprechende Verbindung zwischen der Haltestrebe und dem Werkzeugträger bzw. dem Schwenkarm mittels eines Gelenks realisiert wird, kann das Verbinden/das Lösen der Haltestrebe von der Achse der Biegerolle ohne erheblichen Kraftaufwand erfolgen. Grundsätzlich ist es jedoch auch möglich, die für das Verbinden/das Lösen erforderliche Beweglichkeit durch eine (seitliche) Deformation der Haltestrebe zu erreichen. Dies bedingt jedoch entweder einen erheblichen Kraftaufwand oder eine konstruktiv aufwändige Ausgestaltung, bei der die Haltestrebe ohne nennenswerte Deformation erhebliche Zugkräfte übertragen kann, jedoch relativ biegeweich ist.The connection between the holding strut and the tool carrier or the swivel arm can preferably be designed to be pivotable, whereby the optionally required for a Verbindungslein loosening of the retaining element required mobility can be effected. For example, given a connection between the retaining strut and the axis of the bending roll by attaching to an end pin should be given a certain lateral mobility. If this mobility is realized via a corresponding connection between the holding strut and the tool carrier or the swivel arm by means of a joint, the connecting / releasing the holding strut can be done by the axis of the bending roller without considerable effort. In principle, however, it is also possible to achieve the mobility required for the connection / release by a (lateral) deformation of the retaining strut. However, this requires either a considerable effort or a structurally complex design in which the retaining strut can transmit significant tensile forces without significant deformation, but is relatively flexible.
In einer weiterhin bevorzugten Ausführungsform der vorliegenden Erfindung kann vorgesehen sein, dass das Halteelement mindestens zwei Haltestreben aufweist, von denen zumindest eines mit dem Werkzeugträger und zumindest ein anderes mit dem Schwenkarm verbunden ist, beide jedoch mit dem freien Ende der Achse lösbar verbindbar sind. Eine solche Ausgestaltung des Halteelements eignet sich insbesondere für eine Biegevorrichtung, die zusätzlich noch einen Gleitschuh aufweist. Ein solcher Gleitschuh, dessen Aufbau und Funktion hinreichend aus dem Stand der Technik bekannt ist, ist regelmäßig einlaufseitig neben der Spannbacke angeordnet und liegt direkt an dem zu biegenden Werkstück an. Während des Biegevorgangs bewegt sich der im Bereich des Gleitschuhs befindliche Teil des Werkstücks relativ zu dem Gleitschuh. Der Gleitschuh dient dazu, eine ungewollte seitliche Verformung in diesem Bereich zu verhindern. Diese Stützkräfte des Gleitschuhs können über das Werkstück auf die Biegerolle übertragen werden, was grundsätzlich ebenfalls zu einer ungewollten Verformung der Biegerollenachse führen könnte. Die auf der einen Seite mit der Biegerollenachse und auf der anderen Seite mit dem Werkzeugträger verbundene Haltestrebe verhindert erfindungsgemäß diese Biegebelastung der Biegerollenachse auch dann, wenn der Schwenkarm mit der zweiten, mit dem Schwenkarm verbundenen Haltestrebe, die eine Biegebelastung aufgrund der von der Spannbacke aufgebrachten Klemmkräfte verhindern soll, verschwenkt wurde und sich die Spannbacke demnach nicht mehr neben dem Gleitschuh befindet.In a further preferred embodiment of the present invention can be provided that the holding element has at least two holding struts, of which at least one is connected to the tool carrier and at least one other with the pivot arm, but both are detachably connectable to the free end of the axle. Such an embodiment of the retaining element is particularly suitable for a bending device, which additionally has a sliding shoe. Such a shoe, the structure and function of which is well known in the art, is regularly arranged on the inlet side next to the clamping jaw and bears directly against the workpiece to be bent. During the bending operation, the part of the workpiece located in the area of the sliding shoe moves relative to the sliding block. The shoe serves to prevent unwanted lateral deformation in this area. These supporting forces of the sliding shoe can be transmitted via the workpiece to the bending roller, which in principle could also lead to an unwanted deformation of the bending roller axle. The holding strut connected on one side with the bending roller axis and on the other side with the tool carrier prevents according to the invention this bending load of the bending roller axis even if the pivot arm with the second, connected to the pivot arm holding strut, the bending stress due to the clamping jaw applied by the clamping forces should prevent, was pivoted and the jaw is therefore no longer next to the shoe.
Das erfindungsgemäße Halteelement lässt sich besonders vorteilhaft bei solchen Biegevorrichtungen einsetzen, die ein Links-Rechts-Biegen und/oder ein Mehrradienbiegen ermöglichen, da bei diesen Biegevorrichtungen konstruktiv und funktionsbedingt regelmäßig nur eine einseitige Lagerung der Biegerolle bzw. Biegerolleeinheit vorgesehen ist und bei einem Mehrradienbiegen aufgrund der Mehrzahl übereinander angeordneter Biegerollen ein großer Abstand zwischen der äußersten Biegerolle und der Lagerung ergibt.The holding element according to the invention can be used particularly advantageously in such bending devices that allow left-right bending and / or Mehrradienbiegen, as in these bending devices constructively and functionally regularly only one-sided mounting of the bending roller or bending roller unit is provided and in a Mehrradienbiegen due the majority of each other arranged bending rollers results in a large distance between the outermost bending roller and the storage.
Bei einer Biegevorrichtung, die ein Links-Rechts-Biegen ermöglicht, indem mindestens zwei Biegewerkzeuge vorgesehen werden, von denen jeweils eines durch eine Rotation des Werkzeugträgers um eine Rotationsachse in Eingriff mit dem zu biegenden Werkstück bringbar ist, ist vorzugsweise für jedes der Biegewerkzeuge ein entsprechendes Halteelement vorgesehen.In a bending device, which allows a left-right bending by at least two bending tools are provided, one of which can be brought by a rotation of the tool carrier about a rotation axis in engagement with the workpiece to be bent, is preferably for each of the bending tools a corresponding Holding element provided.
Die Erfindung wird nachfolgend anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert.The invention will be explained in more detail with reference to an embodiment shown in the drawings.
In den Zeichnungen zeigt:
- Fig. 1:
- in einer schematischen, isometrischen Darstellung eine erfindungsgemäße Biegevorrichtung in einer ersten Betriebsstellung; und
- Fig. 2:
- die Biegevorrichtung der
Fig. 1 in einer zweiten Betriebsstellung.
- Fig. 1 :
- in a schematic, isometric view of a bending device according to the invention in a first operating position; and
- Fig. 2 :
- the bending device of
Fig. 1 in a second operating position.
Die in den Figuren dargestellte Biegevorrichtung umfasst einen Grundträger 1, der in den Figuren schematisch in Form eines Quaders dargestellt ist. Auf der Oberseite des Grundträgers 1 ist eine Antriebseinheit 2 vorgesehen, in der ein zu biegendes Rohr 3 fixiert ist. Die Antriebseinheit 2 umfasst einen Elektromotor (nicht dargestellt), mit dem das zu biegende Rohr 3 um die Längsachse des nicht gebogenen Abschnitts des Rohrs gedreht werden kann. Die Antriebseinheit umfasst zudem einen Linearantrieb (nicht dargestellt), der es ermöglicht, diese einschließlich des zu biegenden Rohrs 3 in Richtung der Längsachse des nicht gebogenen Abschnitts des Rohrs 3 relativ zu dem Grundträger 1 zu verschieben.The bending device shown in the figures comprises a base support 1, which is shown schematically in the figures in the form of a cuboid. On the upper side of the base support 1, a
Ein Werkzeugträger 4 der erfindungsgemäßen Biegevorrichtung umfasst einen Grundkörper 5, eine vertikal ausgerichtete Biegewerkzeugachse 6 sowie einen Schwenkarm 7, der relativ zu dem Grundkörper 5 um die Biegewerkzeugachse 6 verschwenkt werden kann. Auf gegenüberliegenden Seiten bezüglich des Grundkörpers 5 ist jeweils eine Biegerolleneinheit 8 eines Biegewerkzeugs angeordnet, die jeweils drei Abschnitte unterschiedlichen Durchmessers aufweist, die als Biegeschablone dienen und den Biegeradius des jeweiligen Biegevorgangs definieren. Jedes der Biegewerkzeuge umfasst weiterhin eine Spannbacke 9, die auf dem Schwenkarm 7 verschiebbar angeordnet ist und in einer Position, in der diese an der jeweiligen Biegerolleneinheit 8 anliegt, das dazwischen befindliche Rohr 3 mit einer definierten Spannkraft klemmt. Weiterhin umfasst jedes der Biegewerkzeuge eine Gleitschiene, die in der dargestellten Stellung des Schwenkarms 7 direkt neben der jeweiligen Spannbacke 9 stationär an dem Grundkörper 5 befestigt ist. In den Figuren werden die Gleitschienen von den Spannbacken 9 verdeckt.A tool carrier 4 of the bending device according to the invention comprises a main body 5, a vertically oriented bending tool axis 6 and a pivot arm 7, which can be pivoted relative to the main body 5 about the bending tool axis 6. On opposite sides with respect to the main body 5, a bending
Der Werkzeugträger 4 ist über eine Verschiebeeinheit 10 an einer Seitenfläche des Grundträgers 1 fixiert. Die Verschiebeeinheit 10 umfasst zwei Linearantriebe 11 a, 11 b, die jeweils aus einem Schlitten 12a, 12b, zwei Linearführungen 13a, 13b sowie einem nicht dargestellten Antrieb (z.B. hydraulischer oder pneumatischer Zylinder, elektromotorischer Spindelantrieb, Zahnstangen-Zahnrad-Linearantrieb, etc.) bestehen. Die jeweils zwei parallele Schienensysteme umfassenden Linearführungen 13a, 13b der Linearantriebe 11 a, 11 b sind in einem Winkel von 90° zueinander ausgerichtet, wobei die Linearführung 13a des ersten Linearantriebs 11a horizontal und die Linearführung 13b des zweiten Linearantriebs 11 b vertikal ausgerichtet ist. Mittels der Verschiebeeinheit 10 kann der Werkzeugträger 4 einschließlich der damit verbundenen Biegewerkzeuge in einer Ebene, die senkrecht zu der Längsachse des ungebogenen Abschnitts des Rohrs 3 ausgerichtet ist, stufenlos verschoben werden. Durch die Verschiebung des Werkzeugträgers 4 relativ zu dem Grundträger 1 beziehungsweise zu dem auf dem Grundträger 1 fixierten Rohr 3 wird ermöglicht, das sich in der Betriebsposition befindliche Biegewerkzeug so zu positionieren, dass sich der zu biegende Abschnitt des Rohrs 3 in der dem gewünschten Biegeradius entsprechenden Biegeschablone der jeweiligen Biegerolleneinheit 8 befindet.The tool carrier 4 is fixed via a
Die
Nachdem eine oder mehrere Biegungen nach rechts durchgeführt wurden, die gegebenenfalls unterschiedliche Biegewinkel und/oder unterschiedliche Biegeradien aufweisen, kann durch eine Drehung des Werkzeugträgers 4 um 180° um eine Rotationsachse, die parallel zu der Längsachse des ungebogenen Abschnitts des Rohrs 3 ausgerichtet ist, das vormals in der Betriebsposition befindliche Biegewerkzeug in eine Parkposition gebracht und das vormals in der Parkposition befindliche Biegewerkzeug entsprechend in die Betriebsposition überführt werden. Eine solche Drehung des Werkzeugträgers kann beispielsweise mittels eines Elektromotors (nicht dargestellt) erfolgen, der eine Welle (nicht dargestellt) antreibt, die drehfest mit dem Werkzeugträger verbunden und drehbar in einer entsprechenden Lagerung des Grundträgers gelagert ist.After one or more bends have been performed to the right, which may have different bending angles and / or different bending radii, by a rotation of the tool carrier 4 by 180 ° about an axis of rotation, which is aligned parallel to the longitudinal axis of the unbent portion of the
Die dargestellte Biegevorrichtung weist erfindungsgemäß Halteelemente auf, die dazu dienen ein Biegemoment, das durch das Andrücken der Spannbacken 9 und der Gleitschuhe an die Biegerolleneinheiten beziehungsweise das Rohr hervorgerufen wird, abzustützen. Die Halteelemente umfassen zwei Querträger 14a, 14b, von denen ein erster Querträger 14a in vertikaler Ausrichtung an dem Grundkörper 5 des Werkzeugträgers 4 und ein zweiter Querträger 14b in vertikaler Ausrichtung seitlich an dem Schwenkarm 7 angeordnet ist. Die beiden Enden der beiden Querträger 14a, 14b überragen den entsprechenden Abschnitt des Werkzeugträgers beziehungsweise des Schwenkarms so weit, dass diese in Höhe der freiliegenden Endzapfen der Biegewerkzeugachse 6 enden. An jedem dieser Enden der Querträger 14a, 14b ist mittels eines einfachen Drehgelenks eine Haltstrebe 15 angelenkt, deren Länge so bemessen ist, dass sich diese bis zu den Endzapfen der Biegewerkzeugachse 6 erstreckt. Die freien Enden der Haltestreben 15 sind mit Öffnungen versehen, deren Innendurchmesser im Wesentlichen dem Außendurchmesser der Endzapfen der Biegewerkzeugachse 6 entspricht. Um eine unzulässig hohe Biegung der Biegewerkzeugachse 6 während des Biegevorgangs zu verhindern, werden die freien Enden der Haltestreben 15 auf die Endzapfen aufgesteckt, wobei die beiden mit dem Schwenkarm 7 verbundenen Haltestreben 15 zuerst und erst nachfolgend die mit dem Grundkörper 5 verbundenen Haltestreben 15 aufgesteckt werden. Grundsätzlich ist es aber auch möglich, diese Reihenfolge entgegengesetzt durchzuführen. Die Anordnung der mit dem Schwenkarm 7 verbundenen Haltestreben 15 unterhalb der anderen Haltestreben 15 ist durch eine entsprechend verkürzte Ausgestaltung des zweiten Querträgers 14b im Vergleich zu dem ersten Querträger 14a berücksichtigt worden, so dass für alle Haltestreben 15 eine im Wesentlichen horizontale Ausrichtung erreicht wird.The illustrated bending device according to the invention has holding elements which serve to support a bending moment, which is caused by the pressing of the clamping jaws 9 and the sliding blocks on the bending roll units or the pipe. The holding elements comprise two
Die
Die
Claims (7)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009043157.8A DE102009043157B4 (en) | 2009-09-26 | 2009-09-26 | Device for bending elongate workpieces |
Publications (2)
Publication Number | Publication Date |
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EP2308611A1 true EP2308611A1 (en) | 2011-04-13 |
EP2308611B1 EP2308611B1 (en) | 2015-05-20 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP20100010436 Not-in-force EP2308611B1 (en) | 2009-09-26 | 2010-09-23 | Device for bending elongate workpieces |
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EP (1) | EP2308611B1 (en) |
DE (1) | DE102009043157B4 (en) |
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DE102015003333A1 (en) | 2015-03-16 | 2016-09-22 | Tracto-Technik Gmbh & Co. Kg | "Apparatus for bending an elongated workpiece, method for clamping an elongate workpiece in a device for bending the elongated workpiece, and use of a compressible portion as a buffer in an apparatus for bending an elongate workpiece" |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2088760A (en) * | 1980-11-21 | 1982-06-16 | Kelly William Richard | Tube and section bending |
WO1999046067A1 (en) * | 1998-03-09 | 1999-09-16 | Eagle Precision Technologies, Inc. | Dual headed bending machine |
EP1226887B1 (en) | 2001-01-30 | 2003-08-06 | BLM S.p.A. | Machine for bending elongated articles like tubes, bars, profiles or metallic wires |
EP1533052A1 (en) * | 2003-11-19 | 2005-05-25 | Pedrazzoli Ibp spa | Bending machine for tubular elements. |
EP1543891A1 (en) * | 2003-12-18 | 2005-06-22 | Herber Industri AB | Locking device |
DE102008018736A1 (en) * | 2007-04-17 | 2009-02-19 | GM Global Technology Operations, Inc., Detroit | Quick change-arm tool mounting-platen |
-
2009
- 2009-09-26 DE DE102009043157.8A patent/DE102009043157B4/en not_active Expired - Fee Related
-
2010
- 2010-09-23 EP EP20100010436 patent/EP2308611B1/en not_active Not-in-force
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2088760A (en) * | 1980-11-21 | 1982-06-16 | Kelly William Richard | Tube and section bending |
WO1999046067A1 (en) * | 1998-03-09 | 1999-09-16 | Eagle Precision Technologies, Inc. | Dual headed bending machine |
EP1226887B1 (en) | 2001-01-30 | 2003-08-06 | BLM S.p.A. | Machine for bending elongated articles like tubes, bars, profiles or metallic wires |
EP1533052A1 (en) * | 2003-11-19 | 2005-05-25 | Pedrazzoli Ibp spa | Bending machine for tubular elements. |
EP1543891A1 (en) * | 2003-12-18 | 2005-06-22 | Herber Industri AB | Locking device |
DE102008018736A1 (en) * | 2007-04-17 | 2009-02-19 | GM Global Technology Operations, Inc., Detroit | Quick change-arm tool mounting-platen |
Also Published As
Publication number | Publication date |
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DE102009043157B4 (en) | 2016-01-21 |
EP2308611B1 (en) | 2015-05-20 |
DE102009043157A1 (en) | 2011-08-04 |
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