EP1914021B1 - Device for bending bars and/or rod shaped workpieces, in particular pipes, and bending tool for this device - Google Patents

Device for bending bars and/or rod shaped workpieces, in particular pipes, and bending tool for this device Download PDF

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Publication number
EP1914021B1
EP1914021B1 EP06022100A EP06022100A EP1914021B1 EP 1914021 B1 EP1914021 B1 EP 1914021B1 EP 06022100 A EP06022100 A EP 06022100A EP 06022100 A EP06022100 A EP 06022100A EP 1914021 B1 EP1914021 B1 EP 1914021B1
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EP
European Patent Office
Prior art keywords
bending
axis
clamping jaw
tool
workpiece
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.)
Revoked
Application number
EP06022100A
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German (de)
French (fr)
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EP1914021A1 (en
Inventor
Christian Fauter
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.)
FELSS Burger GmbH
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FELSS Burger GmbH
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Application filed by FELSS Burger GmbH filed Critical FELSS Burger GmbH
Priority to AT06022100T priority Critical patent/ATE435076T1/en
Priority to DE502006004142T priority patent/DE502006004142D1/en
Priority to EP06022100A priority patent/EP1914021B1/en
Publication of EP1914021A1 publication Critical patent/EP1914021A1/en
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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
    • 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

Definitions

  • the invention relates to a device for bending rod and / or rod-like workpieces, in particular of tubes, with a bending tool comprising a bending core and a jaw assembly, wherein the bending core is rotatable about a bending axis extending in the transverse direction of the workpiece axis and the jaw assembly is a jaw has, relative to the bending core in the transverse direction of both the workpiece axis and the bending axis in a functional position undeliverable, wherein at befindlichem in functional position jaw a workpiece between the bending core and the jaw is clamped and wherein at clamped between the bending core and the jaw workpiece of the bending core rotatable about the bending axis and thus jointly the clamping jaw about the bending axis and thereby pivot the workpiece can be pulled around the bending core.
  • the invention further relates to a bending tool for a device of the type mentioned.
  • the bending tool of the known bending machine comprises a bending core, clamping jaws and slide rails.
  • the bending core is rotatable about a bending axis.
  • At its biegeachsparleichen outside of the bending core is provided with in the direction of the bending axis superposed grooves, which serve to receive the pipes to be bent.
  • Each groove of the bending core is opposite to a jaw in the radial direction of the bending axis.
  • the clamping jaw used for forming is moved in the direction of the bending core.
  • the tube in question is clamped between the bending core and the clamping jaw.
  • the bending core is rotated about the bending axis and at the same time the clamping jaw is pivoted about the bending axis.
  • the clamped between the bending core and the jaw tube is thereby pulled around the bending core.
  • a slide rail of the bending tool is arranged upstream of the clamping jaw on the side remote from the bending core of the pipe to be bent.
  • Object of the present invention is to provide a bending device and a bending tool that allow flexible workpiece machining.
  • this object is achieved by the bending tool according to claim 11, as well as by the bending device according to claim 1, comprising the bending tool according to claim 11.
  • the functions bending bending and roll bending are integrated into a single bending tool.
  • the user has the choice of which of the two bending methods he uses.
  • it is possible to create on the same workpiece both bends after the drawing bending process as well as bends after the roll bending process.
  • Characteristic of the drawing bending process are the clamping of the workpiece to be bent between the bending core and clamping jaw and the pulling of the thereby moving in the direction of the workpiece axis workpiece around the bending core.
  • no movement of the workpiece to be machined takes place in the direction of the workpiece axis.
  • Rolling bending elements which can be considered are both bending tool parts which roll on the workpiece surface during said relative movement, as well as bending tool parts which slide along the workpiece surface.
  • the bending device according to the invention and the bending tool according to the invention are able to handle machining tasks of various kinds. Pull bending is preferred, for example, when only a small workpiece length is available for applying the bending tool downstream of the bend to be created.
  • Pull bending is preferred, for example, when only a small workpiece length is available for applying the bending tool downstream of the bend to be created.
  • a workpiece can be securely fixed even over a very small clamping length. In a large number of cases, 1.5 times the diameter of the workpiece is sufficient as a clamping length.
  • the workpiece With a Clamping of the relevant workpiece over such a small clamping length, the workpiece can be safely bent around the bending axis with his on the clamping length following the length section by rotating the bending core and pivoting the jaw.
  • Such short clamping lengths are available, for example, in machining cases in which bends are to be created on a workpiece, which have only a small mutual distance along the workpiece axis. Bends close to each other are to be created, for example, in the manufacture of fuel and brake lines and of exhaust systems for motor vehicles.
  • Roll bending is characterized by its particularly easy implementation. Neither is the workpiece to be clamped in the bending machining between the bending core and the roll bending member nor does it require a rotation of the bending core associated with the bending pivotal movement of the roll bending member.
  • the roll bending member is pivotable about the bending core when the clamping jaw is in the functional position with a bending pivoting movement (claim 3).
  • the bending bending devices bending core and jaw can therefore serve during roll bending for fixing the workpiece to be formed during the roll bending process.
  • the roll bending member is able to laterally support the workpiece to be formed during the drawing bending by means of bending core and clamping jaw near the clamping jaw.
  • the Rollbiegeorgan takes over the function of a slide rail as provided in the case of conventional drawing bending tools in addition to the bending core and jaw.
  • a particularly gentle workpiece machining results when a bending roll is provided as a roll bending member, which rolls during drawing bending on the moving in the direction of the workpiece axis workpiece.
  • the claims 5 to 7 relate to inventively provided measures for positioning of the bending tool relative to the workpiece to be machined.
  • the rotational mobility of the bending tool according to claim 5 allows in particular to arrange the bending tool near a Maschinenzhoueinposition, which in turn fixes the workpiece.
  • the bending unit of the bending tool is used which is arranged on the side of the bending tool remote from the workpiece clamping.
  • either the drawing bending unit or the roll bending unit of the bending tool can be transferred to the position in relation to the workpiece clamping in which it can be used to create a bend on the workpiece.
  • the verticianlich claim 6 provided mobility of the bending tool in the transverse direction of the workpiece axis allows, for example, make the change of the bending unit to be used in fixed at the Maschinen Swisseinponent workpiece. After opening the bending tool this is moved in the workpiece transverse direction until the workpiece comes to rest outside the bending tool. Subsequently, the for the change the bending devices required to be used rotational movement of the bending tool are performed around the tool axis of rotation.
  • the bending tool according to the invention can be positioned in the longitudinal direction of the relevant workpiece. As a result, the location of the bend to be created in the workpiece longitudinal direction can be selected.
  • the prerequisite for the bending tool can be moved from one side of the workpiece to be machined workpiece clamping on the opposite side of the Maschinen Swisseintim. As a result, it can be freely selected from which side of the clamping of the workpiece a workpiece which is to be bent several times is machined. You can also change the page of editing. If the bending tool is also rotatable about a tool rotational axis according to claim 5, the position change of the bending tool can be connected from one side of the workpiece clamping to the opposite side with a change of the bending unit to be used and possibly also with a change of the bending direction.
  • the invention type of construction according to claim 8 is characterized in that the tool rotation axis serving for positioning the bending tool relative to the workpiece to be machined coincides with at least one axis of the bending operation to be performed by means of the bending tool.
  • This circumstance can be used in the constructive implementation of the concept according to the invention.
  • the same drive can be used for positioning the bending tool relative to the workpiece as for workpiece deformation by means of drawing bending or roll bending.
  • the bending tool is attached to a tool carrier, which in turn is rotatable about the tool axis of rotation.
  • the bending tool is designed as a multi-level bending tool (claim 10).
  • multi-level bending tools of this type allow the machining of workpieces with different cross-sections, without a tool change in the true sense would be required for this purpose. If, for example, the diameter of the pipe to be machined changes during tube processing, then the multi-level bending tool is to be arranged at the level of the pipe in question only at that level whose bending tool parts are matched to the changed pipe diameter.
  • a bending tool 1 for machining pipes comprises a bending core 2 with workpiece installations in the form of bending dies 3, 4, 5. These lie one above the other in the direction of a bending axis 6 and have die grooves 7, 8, 9 extending in the circumferential direction of the bending core 2.
  • the bending tool 1 is therefore a multi-level bending tool with a total of three bending tool levels. Since the bending tool 1 is provided for processing tubes having a circular cross-section, the die grooves 7, 8, 9 on the bending core 2 have a semicircular shape in cross-section. The semicircular radius of the cross section of the die grooves 7, 8, 9 varies. As a result, tubes of different diameters can be machined on the various bending tool levels of the bending tool 1. A number of bending tool levels deviating from the illustrated ratios, as well as die grooves with a cross-sectional shape deviating from the semicircular cross section shown, are conceivable.
  • FIG. 1 In addition to the bending core 2 is shown FIG. 1 as a further part of the bending tool 1, a roll bending assembly 10 is provided.
  • This has as Rollbiegeorgane bending rollers 11, 12, 13 which are rotatably mounted on a bending roller carriage 14 about a bending roller axis 15.
  • the bending roller shaft 15 of the roll bending assembly 10 is parallel to the bending axis 6 on the bending core 2.
  • the bending roller 11 is provided with a Rollendesignsnut 16, the bending roller 12 with a Rollendesignsnut 17 and the bending roller 13 with a Rollendesignsnut 18.
  • the bending roller 11 is associated with the bending die 3, the bending roller 12 of the bending die 4 and the bending roller 13 of the bending die 5.
  • the cross section of the roller circumferential grooves 16, 17, 18 corresponds to the cross section of the respective associated die groove 7, 8, 9.
  • the mutual half-circular cross sections of the mutually associated die grooves 7, 8, 9 and roller circumferential grooves 16, 17, 18 complement each other approximately to the circular cross section of each machining pipe.
  • the rotatable bending rollers 11, 12, 13 can be provided as a roll bending organs and rigid bending fingers.
  • the bending roller carriage 14 of the roll bending arrangement 10 is displaceably guided on a first pivoting support 19 in the direction of a double arrow 20 and thus in the radial direction of the bending axis 6.
  • the first pivot support 19 is in turn pivotable about a roll bending pivot axis 21 and thereby movable relative to the bending core 2.
  • the roll bending pivot axis 21 of the first pivot support 19 coincides with the bending axis 6.
  • a double arrow 22 illustrates the direction of the pivoting mobility of the first pivot support 19 and thus also of the roll bending arrangement 10.
  • the roll bending assembly 10 immediately adjacent is the third part of the bending tool 1 a jaw assembly 23rd
  • the jaw assembly 23 comprises three in the direction of the bending axis 6 superimposed Jaws 24, 25, 26.
  • the latter are attached to a jaw carriage 27.
  • the clamping jaw 24 is assigned to the bending die 3, the clamping jaw 25 to the bending die 4 and the clamping jaw 26 to the bending die 5.
  • Jaw grooves 28, 29, 30 have semicircular cross sections, which complement each other with the semicircular cross sections of the associated die grooves 7, 8, 9 approximately to the circular cross section of the pipe to be machined.
  • the jaw 24 is provided with a recess. This recess is used in workpiece machining for receiving attachments or radial widening of the pipe to be bent.
  • the jaw carriage 27 is slidably guided on a second pivot carrier 31 in the direction of a double arrow 32. Together with the bending core 2, the second pivot carrier 31 can be moved about the bending axis 6.
  • the rotational mobility of the bending core 2 and the pivoting mobility of the second pivot support 31 with the jaw assembly 23 are also illustrated by the double arrow 22.
  • the clamping jaws 24, 25, 26 of the jaw assembly 23 cooperate with opposite rectilinear sections of the bending dies 3, 4, 5 on the bending core 2 together.
  • the bending rollers 11, 12, 13 of the roll bending arrangement 10 are shared with the bent portions of the bending dies 3, 4, 5 used for workpiece forming by the roll bending process.
  • FIGS. 3a to 8 the bending tool 1 is shown very schematically. Constructive details of the bending tool 1 are largely omitted.
  • the bending tool 1 is mounted together with the first pivot support 19 and the second pivot support 31 on a designed as a console 33 tool carrier.
  • the bracket 33 is movable by means of a cross slide not shown in detail on the ground in the direction of two mutually perpendicular axes 34, 35.
  • a console rotary drive 36 is provided between the bracket 33 and the cross slide, not shown.
  • This includes a gear housing 37 and a drive motor 38 flanged thereto.
  • the bracket 33 is rotatable about a tool axis of rotation 39.
  • the tool axis of rotation 39 coincides with the bending axis 6 and with the roll bending pivot axis 21.
  • a roll bending drive 40 is attached to the bracket 33.
  • Part of the roll bending drive 40 is a drive motor 41 flanged to the bracket 33, by means of which the first pivot support 19 can be pivoted about the roll bending pivot axis 21 or the bending axis 6.
  • the bending tool 1 on the bracket 33 in the direction of a double arrow 42 is moved up and down.
  • FIG. 3a a Werk Swisseinposition shown in the form of a conventional pivoting gripper 45.
  • the pivotal gripper 45 is capable of it clamped workpieces, in the illustrated example, a tube 46 to rotate a workpiece axis or a tube axis 47.
  • the overall arrangement forms a bending device by means of which tubes 46 can be processed both by the roll bending method and by the drawing bending method.
  • the bending tool 1 is open, a pipe to be machined 46 was inserted by appropriate relative movement of the pivoting gripper 45 and bending tool 1 in the open bending tool 1.
  • the console 33 was moved with the open bending tool 1 in the direction of the vertical axis or the double arrow 42 and in the direction of the horizontal axis 35 relative to the tube 46 held on the pivoting gripper 45.
  • the lowermost bending tool level of the bending tool 1 is used for the deformation of the tube 46.
  • the bending tool 1 is closed.
  • the roll bending assembly 10 on the first pivot support 19 and the jaw assembly 23 are moved on the second pivot support 31 in the transverse direction of the tube axis 47 to the bending core 2 by means of a not shown in detail traversing drive.
  • the tube 46 is approximately completely enclosed by the die groove 9 of the bending die 5 on the one hand and the Rollendesignsnut 18 of the bending roller 13 and the jaw groove 30 of the jaw 26 on the other hand in the circumferential direction.
  • the tube 46 is clamped.
  • the jaw 26 and the bending roller 13 are in their functional position. All in all, the results in the FIGS. 3a and 3b illustrated operating situation.
  • the first pivot support 19 is now pivoted jointly with the roll bending arrangement 10 resting thereon about the bending axis 6 or the roll bending pivot axis 21 ( FIGS. 4a, 4b ).
  • the pivoting direction of the roll bending assembly 10 is in FIG. 4a indicated by an arrow above the bending tool 1.
  • the swivel angle is 90 ° in the illustrated example case.
  • the roll bending arrangement 10 rolls with the bending roller 13 on the tube 46.
  • the tube 46 is bent around the bending core 2 with a right bend of 90 °.
  • the tube 46 Due to the clamping by the bending die 5 and the jaw 26, which is arranged along the tube axis 47 next to the bending roller 13, the tube 46 is securely fixed during the roll bending operation, in particular in the longitudinal direction of the tube axis 47 in its desired position.
  • the bending tool 1 is opened and the deformed tube 46 can either be removed from the bending tool 1 or be formed by means of the bending tool 1 a further time. Further forming can be done either again after the roll bending process or after the drawing bending process.
  • the bending tool 1 is based on the conditions according to FIGS FIGS. 3a and 3b open and then lower by means of the positioning drive 43 relative to the tube 46 until the bending tool 1 comes to lie below the tube 46. Subsequently, the console 33 and with this the bending tool 1 by means of the console rotary drive 36 is rotated by 180 ° about the tool axis of rotation 39 and then moved by means of the console rotary drive 36 overlapping cross slide so far in the direction of the axis 35 until the opening of the open Bending tool 1 is located below the tube 46.
  • the tube 46 runs into the opening of the bending tool 1, which is jointly moved with the console 33. After a short movement of the bracket 33 and bending tool 1 in the direction of the axis 35, the tube 46 is located on the still open bending tool 1 in the die groove 9 of the bending die 5 on the bending core 2. It thus results in in FIG. 8 illustrated situation. During the described movement of the bending tool 1, the tube 46 is clamped to the swivel gripper 45.
  • the bending tool 1 is closed, then the operating state results according to the FIGS. 5a and 5b ,
  • the tube 46 is clamped between the bending die 5 of the bending core 2 and the jaw 26 of the jaw assembly 23.
  • the bending roller 13 of the roll bending assembly 10 is located on the side remote from the bending core 2 side of the tube 46 in a position in which it bears against the wall of the roller circumferential groove 18 on the wall of the tube 46 without pressure.
  • the jaw 26 After completion of the Ziehbiegevorganges the jaw 26 is withdrawn relative to the bending core 2, then before the second pivot carrier 31 by corresponding rotational movement of the bracket 33 about the tool axis of rotation 39 in its initial rotational position according to FIG. 5a is pivoted back. Also in this pivotal movement of the bracket 33, the first pivot support 19, driven by the roll bending drive 40, carries out a compensation pivoting movement in the opposite direction. Finally, the second pivoting support 31 with the clamping jaw arrangement 23 and the first pivoting support 19 with the roll bending arrangement 10 are again parallel to one another in the pivoting position FIG.
  • the roll bending assembly 10 is also moved in the opening direction of the bending tool 1, the bending tool 1 is opened and the tube 46 can either be removed from the bending tool 1 or delivered in the longitudinal direction of the bending tool 1 and thereby positioned for a further bending operation.
  • the bending tool 1 For the positioning of the bending tool 1 relative to the tube 46 also serves the mobility of the bracket 33 in the direction of the axis 34. Due to this longitudinal mobility and taking advantage of their transverse mobility in the direction of the double arrow 42, the console 33 with the bending tool 1 from one side of the pivoting gripper 45 proceed on the opposite side. If the bending tool 1 is approximately based on the conditions according to FIG.
  • the tube 46 can be processed after a final fine positioning and the closing of the bending tool 1 by the drawing bending process , Is the described movement of the bracket 33 and the bending tool 1 in addition combined with a 180 ° rotation of the console 33 about the tool axis of rotation 39, 45 can be created on the opposite side of the pivoting gripper bending by the roll bending process.
  • the bending tool 1 is to be positioned by means of the travel drive 43 in such a way that the tool parts of the relevant bending tool level come to rest at the height of the pipe to be machined.

Abstract

The bending device has a bending tool (1) with bending core (2), clamping device (23) and roll bending device (10), which has bending rolls (11, 12, 13). The bending rolls is turned round the bending core under the effect of the bending rolls on a roll-bending turning axis (21). The traction bending process can also be applied by this device.

Description

Die Erfindung betrifft eine Vorrichtung zum Biegen von stangen- und/oder stabartigen WerkstĂĽcken, insbesondere von Rohren, mit einem Biegewerkzeug, das einen Biegekern sowie eine Klemmbackenanordnung umfasst, wobei der Biegekern um eine in Querrichtung der WerkstĂĽckachse verlaufende Biegeachse drehbar ist und die Klemmbackenanordnung eine Klemmbacke aufweist, die gegenĂĽber dem Biegekern in Querrichtung sowohl der WerkstĂĽckachse als auch der Biegeachse in eine Funktionsstellung zustellbar ist, wobei bei in Funktionsstellung befindlicher Klemmbacke ein WerkstĂĽck zwischen dem Biegekern und der Klemmbacke klemmbar ist und wobei bei zwischen dem Biegekern und der Klemmbacke geklemmtem WerkstĂĽck der Biegekern um die Biegeachse drehbar und gemeinschaftlich damit die Klemmbacke um die Biegeachse schwenkbar und dadurch das WerkstĂĽck um den Biegekern ziehbar ist. Die Erfindung betrifft des Weiteren ein Biegewerkzeug fĂĽr eine Vorrichtung der genannten Art.The invention relates to a device for bending rod and / or rod-like workpieces, in particular of tubes, with a bending tool comprising a bending core and a jaw assembly, wherein the bending core is rotatable about a bending axis extending in the transverse direction of the workpiece axis and the jaw assembly is a jaw has, relative to the bending core in the transverse direction of both the workpiece axis and the bending axis in a functional position undeliverable, wherein at befindlichem in functional position jaw a workpiece between the bending core and the jaw is clamped and wherein at clamped between the bending core and the jaw workpiece of the bending core rotatable about the bending axis and thus jointly the clamping jaw about the bending axis and thereby pivot the workpiece can be pulled around the bending core. The invention further relates to a bending tool for a device of the type mentioned.

Gattungsgemäßer Stand der Technik ist bekannt aus EP-A-0 538 207 . Diese Vorveröffentlichung betrifft eine Biegemaschine zum Biegen von Rohren nach dem so genannten Ziehbiegeverfahren. Das Biegewerkzeug der vorbekannten Biegemaschine umfasst einen Biegekern, Klemmbacken und Gleitschienen. Der Biegekern ist um eine Biegeachse drehbar. An seiner biegeachsparallelen Außenseite ist der Biegekern mit in Richtung der Biegeachse übereinander liegenden Nuten versehen, die zur Aufnahme der zu biegenden Rohre dienen. Jeder Nut des Biegekerns liegt in radialer Richtung der Biegeachse eine Klemmbacke gegenüber. Bei geöffnetem Biegewerkzeug wird ein zu bearbeitendes Rohr in den Zwischenraum zwischen dem Biegekern und den Klemmbacken eingeführt. Anschließend wird die zur Umformung genutzte Klemmbacke in Richtung auf den Biegekern bewegt. Dadurch wird das betreffende Rohr zwischen dem Biegekern und der Klemmbacke geklemmt. Ausgehend von diesem Zustand wird der Biegekern um die Biegeachse gedreht und gleichzeitig die Klemmbacke um die Biegeachse geschwenkt. Das zwischen dem Biegekern und der Klemmbacke geklemmte Rohr wird dabei um den Biegekern herumgezogen. Eine Gleitschiene des Biegewerkzeuges ist rohraufwärts der Klemmbacke an der von dem Biegekern abliegenden Seite des zu biegenden Rohres angeordnet. Bei der um die Biegeachse ausgeführten gemeinschaftlichen Dreh- und Schwenkbewegung des Biegekerns sowie der Klemmbacke stützt die Gleitschiene das zu biegende Rohr in seinem unverformten Bereich seitlich ab.Generic prior art is known from EP-A-0 538 207 , This prior publication relates to a bending machine for bending pipes according to the so-called drawing bending method. The bending tool of the known bending machine comprises a bending core, clamping jaws and slide rails. The bending core is rotatable about a bending axis. At its biegeachsparleichen outside of the bending core is provided with in the direction of the bending axis superposed grooves, which serve to receive the pipes to be bent. Each groove of the bending core is opposite to a jaw in the radial direction of the bending axis. When the bending tool is open, a pipe to be machined is introduced into the space between the bending core and the clamping jaws. Subsequently, the clamping jaw used for forming is moved in the direction of the bending core. As a result, the tube in question is clamped between the bending core and the clamping jaw. Starting from this state, the bending core is rotated about the bending axis and at the same time the clamping jaw is pivoted about the bending axis. The clamped between the bending core and the jaw tube is thereby pulled around the bending core. A slide rail of the bending tool is arranged upstream of the clamping jaw on the side remote from the bending core of the pipe to be bent. When executed around the bending axis Community rotary and pivotal movement of the bending core and the jaw, the slide supports the pipe to be bent laterally in its undeformed area.

Aufgabe der vorliegenden Erfindung ist es, eine Biegevorrichtung sowie ein Biegewerkzeug bereitzustellen, die eine flexible Werkstückbearbeitung ermöglichen.Object of the present invention is to provide a bending device and a bending tool that allow flexible workpiece machining.

Erfindungsgemäß gelöst wird diese Aufgabe durch das Biegewerkzeug gemäß Patentanspruch 11, sowie durch die Biegevorrichtung gemäß Patentanspruch 1, die das Biegewerkzeug gemäß Anspruch 11 umfaßt.According to the invention this object is achieved by the bending tool according to claim 11, as well as by the bending device according to claim 1, comprising the bending tool according to claim 11.

Demnach sind im Falle der Erfindung die Funktionen Ziehbiegen und Rollbiegen in ein einziges Biegewerkzeug integriert. Der Anwender hat die Wahl, von welchem der beiden Biegeverfahren er Gebrauch macht. Insbesondere besteht die Möglichkeit, an ein und demselben Werkstück sowohl Biegungen nach dem Ziehbiegeverfahren als auch Biegungen nach dem Rollbiegeverfahren zu erstellen Charakteristisch für das Ziehbiegeverfahren sind die Klemmung des zu biegenden Werkstückes zwischen Biegekern und Klemmbacke sowie das Ziehen des sich dabei in Richtung der Werkstückachse bewegenden Werkstückes um den Biegekern. Bei Anwendung des Rollbiegeverfahrens findet keine Bewegung des zu bearbeitenden Werkstückes in Richtung der Werkstückachse statt. In Richtung der Werkstückachse bewegt sich vielmehr das verwendete Rollbiegeorgan, das in Richtung der Werkstückachse eine Relativbewegung gegenüber dem stationären Werkstück ausführt. Als Rollbiegeorgane in Frage kommen sowohl Biegewerkzeugteile, die bei der genannten Relativbewegung auf der Werkstückoberfläche abrollen, als auch Biegewerkzeugteile, die an der Werkstückoberfläche entlanggleiten.Accordingly, in the case of the invention, the functions bending bending and roll bending are integrated into a single bending tool. The user has the choice of which of the two bending methods he uses. In particular, it is possible to create on the same workpiece both bends after the drawing bending process as well as bends after the roll bending process. Characteristic of the drawing bending process are the clamping of the workpiece to be bent between the bending core and clamping jaw and the pulling of the thereby moving in the direction of the workpiece axis workpiece around the bending core. When using the roll bending process no movement of the workpiece to be machined takes place in the direction of the workpiece axis. In the direction of the workpiece axis, rather, the roll bending element used, which carries out a relative movement in the direction of the workpiece axis relative to the stationary workpiece, moves. Rolling bending elements which can be considered are both bending tool parts which roll on the workpiece surface during said relative movement, as well as bending tool parts which slide along the workpiece surface.

Die erfindungsgemäße Biegevorrichtung sowie das erfindungsgemäße Biegewerkzeug sind in der Lage, Bearbeitungsaufgaben unterschiedlichster Art zu bewältigen. Ziehbiegen wird beispielsweise dann bevorzugt, wenn werkstückabwärts der zu erstellenden Biegung nur eine geringe Werkstücklänge zur Beaufschlagung mittels des Biegewerkzeuges zur Verfügung steht. So kann zwischen einem Biegekern und der zugehörigen Klemmbacke ein Werkstück selbst über eine ausgesprochen geringe Klemmlänge sicher fixiert werden. In einer Vielzahl von Fällen reicht das 1,5-fache des Werkstückdurchmessers als Klemmlänge aus. Mit einer Klemmung des betreffenden Werkstückes über eine derart geringe Klemmlänge kann das Werkstück mit seinem auf die Klemmlänge folgenden Längenabschnitt unter Drehen des Biegekerns und Schwenken der Klemmbacke funktionssicher um die Biegeachse gebogen werden. Derart kurze Klemmlängen stehen beispielsweise in Bearbeitungsfällen zur Verfügung, in denen an einem Werkstück Biegungen zu erstellen sind, die längs der Werkstückachse nur einen geringen gegenseitigen Abstand aufweisen. Nahe beieinander liegende Biegungen sind beispielsweise bei der Herstellungen von Kraftstoff- und Bremsleitungen sowie von Auspuffanlagen für Kraftfahrzeuge zu erstellen. Für das Rollbiegen spricht seine besonders einfache Umsetzbarkeit. Weder ist das Werkstück bei der biegenden Bearbeitung zwischen dem Biegekern und dem Rollbiegeorgan zu klemmen noch bedarf es einer mit der Biege-Schwenkbewegung des Rollbiegeorgans einhergehenden Drehung des Biegekerns.The bending device according to the invention and the bending tool according to the invention are able to handle machining tasks of various kinds. Pull bending is preferred, for example, when only a small workpiece length is available for applying the bending tool downstream of the bend to be created. Thus, between a bending core and the associated clamping jaw a workpiece can be securely fixed even over a very small clamping length. In a large number of cases, 1.5 times the diameter of the workpiece is sufficient as a clamping length. With a Clamping of the relevant workpiece over such a small clamping length, the workpiece can be safely bent around the bending axis with his on the clamping length following the length section by rotating the bending core and pivoting the jaw. Such short clamping lengths are available, for example, in machining cases in which bends are to be created on a workpiece, which have only a small mutual distance along the workpiece axis. Bends close to each other are to be created, for example, in the manufacture of fuel and brake lines and of exhaust systems for motor vehicles. Roll bending is characterized by its particularly easy implementation. Neither is the workpiece to be clamped in the bending machining between the bending core and the roll bending member nor does it require a rotation of the bending core associated with the bending pivotal movement of the roll bending member.

Besondere Ausführungsarten der Biegevorrichtung nach Patentanspruch 1 ergeben sich aus den abhängigen Patentansprüchen 2 bis 10.Particular embodiments of the bending device according to claim 1 emerge from the dependent claims 2 to 10.

Gemäß Patentanspruch 2 ist im Interesse einer einfachen Gestaltung der Gesamtanordnung vorgesehen, dass die Biegeachse, um welche der Biegekern und die zugehörige Klemmbacke beim Ziehbiegen gemeinschaftlich bewegt werden, mit der Rollbiege-Schwenkachse zusammenfällt, um welche das Rollbiegeorgan seine Biege-Schwenkbewegung ausführt.According to claim 2, it is provided in the interest of a simple design of the overall arrangement that the bending axis about which the bending core and the associated jaw are moved jointly during the drawing bending coincides with the roll bending pivot axis about which the roll bending member performs its bending pivotal movement.

Im Falle einer weiteren Erfindungsbauart ist das Rollbiegeorgan bei in der Funktionsstellung befindlicher Klemmbacke mit einer Biege-Schwenkbewegung um den Biegekern schwenkbar (Patentanspruch 3). Die Ziehbiegeeinrichtungen Biegekern und Klemmbacke können demnach beim Rollbiegen zur Fixierung des umzuformenden Werkstückes während des Rollbiegevorganges dienen.In the case of a further embodiment type, the roll bending member is pivotable about the bending core when the clamping jaw is in the functional position with a bending pivoting movement (claim 3). The bending bending devices bending core and jaw can therefore serve during roll bending for fixing the workpiece to be formed during the roll bending process.

In entsprechender Weise ist an der Biegevorrichtung beziehungsweise an dem Biegewerkzeug gemäß Patentanspruch 4 das Rollbiegeorgan in der Lage, das umzuformende Werkstück während des Ziehbiegens mittels Biegekern und Klemmbacke nahe der Klemmbacke seitlich abzustützen. Das Rollbiegeorgan übernimmt insoweit die Funktion einer Gleitschiene wie sie im Falle herkömmlicher Ziehbiegewerkzeuge zusätzlich zu Biegekern und Klemmbacke vorgesehen ist. Eine besonders schonende Werkstückbearbeitung ergibt sich dann, wenn als Rollbiegeorgan eine Biegerolle vorgesehen ist, die beim Ziehbiegen auf dem sich in Richtung der Werkstückachse bewegenden Werkstück abrollt.Correspondingly, at the bending device or at the bending tool according to claim 4, the roll bending member is able to laterally support the workpiece to be formed during the drawing bending by means of bending core and clamping jaw near the clamping jaw. The Rollbiegeorgan takes over the function of a slide rail as provided in the case of conventional drawing bending tools in addition to the bending core and jaw. A particularly gentle workpiece machining results when a bending roll is provided as a roll bending member, which rolls during drawing bending on the moving in the direction of the workpiece axis workpiece.

Die Patentansprüche 5 bis 7 betreffen erfindungsgemäß vorgesehene Maßnahmen zur Positionierung des Biegewerkzeuges gegenüber dem zu bearbeitenden Werkstück. Die Drehbeweglichkeit des Biegewerkzeuges gemäß Patentanspruch 5 gestattet es insbesondere, das Biegewerkzeug nahe einer Werkstückeinspannung anzuordnen, die ihrerseits das Werkstück fixiert. Zum Erstellen einer Biegung eingesetzt wird diejenige Biegeeinheit des Biegewerkzeuges, die an der von der Werkstückeinspannung abliegenden Seite des Biegewerkzeuges angeordnet ist. Durch eine Drehbewegung um die in Patentanspruch 5 angegebene Werkzeugdrehachse kann entweder die Ziehbiegeeinheit oder die Rollbiegeeinheit des Biegewerkzeuges in diejenige Position gegenüber der Werkstückeinspannung überführt werden, in welcher sie zur Erstellung einer Biegung an dem Werkstück genutzt werden kann. Die ausweislich Patentanspruch 6 vorgesehene Beweglichkeit des Biegewerkzeuges in Querrichtung der Werkstückachse gestattet es beispielsweise, den Wechsel der zu nutzenden Biegeeinheit bei an der Werkstückeinspannung fixiertem Werkstück vorzunehmen. Nach dem Öffnen des Biegewerkzeuges wird dieses in Werkstückquerrichtung so weit verfahren, bis das Werkstück außerhalb des Biegewerkzeuges zu liegen kommt. Anschließend kann die für den Wechsel der zu nutzenden Biegeeinrichtungen erforderliche Drehbewegung des Biegewerkzeuges um die Werkzeugdrehachse ausgeführt werden. Gemäß Patentanspruch 7 lässt sich das erfindungsgemäße Biegewerkzeug in Längsrichtung des betreffenden Werkstückes positionieren. Dadurch ist der Ort der zu erstellenden Biegung in Werkstückslängsrichtung wählbar. In Kombination mit der Querbeweglichkeit nach Patentanspruch 6 schafft die Längsbeweglichkeit des Biegewerkzeuges gemäß Patentanspruch 7 die Voraussetzung dafür, dass das Biegewerkzeug von einer Seite einer das zu bearbeitende Werkstück fixierenden Werkstückeinspannung auf die gegenüberliegende Seite der Werkstückeinspannung bewegt werden kann. Dadurch ist frei wählbar, von welcher Seite der Werkstückeinspannung aus ein Werkstück, das mehrfach zu biegen ist, bearbeitet wird. Auch lässt sich die Seite der Bearbeitung wechseln. Ist das Biegewerkzeug auch noch gemäß Patentanspruch 5 um eine Werkzeugdrehachse drehbar, so kann der Positionswechsel des Biegewerkzeuges von einer Seite der Werkstückeinspannung auf die gegenüberliegende Seite verbunden werden mit einem Wechsel der zu nutzenden Biegeeinheit und gegebenenfalls auch mit einem Wechsel der Biegerichtung.The claims 5 to 7 relate to inventively provided measures for positioning of the bending tool relative to the workpiece to be machined. The rotational mobility of the bending tool according to claim 5 allows in particular to arrange the bending tool near a Werkstückeinspannung, which in turn fixes the workpiece. To create a bend, the bending unit of the bending tool is used which is arranged on the side of the bending tool remote from the workpiece clamping. By means of a rotational movement about the tool rotation axis specified in claim 5, either the drawing bending unit or the roll bending unit of the bending tool can be transferred to the position in relation to the workpiece clamping in which it can be used to create a bend on the workpiece. The verweislich claim 6 provided mobility of the bending tool in the transverse direction of the workpiece axis allows, for example, make the change of the bending unit to be used in fixed at the Werkstückeinspannung workpiece. After opening the bending tool this is moved in the workpiece transverse direction until the workpiece comes to rest outside the bending tool. Subsequently, the for the change the bending devices required to be used rotational movement of the bending tool are performed around the tool axis of rotation. According to claim 7, the bending tool according to the invention can be positioned in the longitudinal direction of the relevant workpiece. As a result, the location of the bend to be created in the workpiece longitudinal direction can be selected. In combination with the transverse mobility according to claim 6 provides the longitudinal mobility of the bending tool according to claim 7, the prerequisite for the bending tool can be moved from one side of the workpiece to be machined workpiece clamping on the opposite side of the Werkstückeinspannung. As a result, it can be freely selected from which side of the clamping of the workpiece a workpiece which is to be bent several times is machined. You can also change the page of editing. If the bending tool is also rotatable about a tool rotational axis according to claim 5, the position change of the bending tool can be connected from one side of the workpiece clamping to the opposite side with a change of the bending unit to be used and possibly also with a change of the bending direction.

Die Erfindungsbauart nach Patentanspruch 8 zeichnet sich dadurch aus, dass die zur Positionierung des Biegewerkzeuges gegenüber dem zu bearbeitenden Werkstück dienende Werkzeugdrehachse mit wenigstens einer Achse des mittels des Biegewerkzeuges durchzuführenden Biegevorganges zusammenfällt. Dieser Umstand lässt sich bei der konstruktiven Umsetzung des erfindungsgemäßen Konzeptes nutzen. Beispielsweise kann zur Positionierung des Biegewerkzeuges gegenüber dem Werkstück derselbe Antrieb genutzt werden wie für die Werkstückumformung mittels Ziehbiegen oder mittels Rollbiegen.The invention type of construction according to claim 8 is characterized in that the tool rotation axis serving for positioning the bending tool relative to the workpiece to be machined coincides with at least one axis of the bending operation to be performed by means of the bending tool. This circumstance can be used in the constructive implementation of the concept according to the invention. For example, the same drive can be used for positioning the bending tool relative to the workpiece as for workpiece deformation by means of drawing bending or roll bending.

Ausweislich Patentanspruch 9 ist das Biegewerkzeug an einem Werkzeugträger angebracht, der seinerseits um die Werkzeugdrehachse drehbar ist.As shown in claim 9, the bending tool is attached to a tool carrier, which in turn is rotatable about the tool axis of rotation.

Auch weitere für den praktischen Einsatz erforderliche Bewegungsmöglichkeiten des Biegewerkzeuges können durch eine entsprechende Beweglichkeit des Werkzeugträgers realisiert werden.Also required for practical use movement possibilities of the bending tool can be realized by a corresponding mobility of the tool carrier.

In weiterer bevorzugter Ausgestaltung der Erfindung ist das Biegewerkzeug als Mehrniveau-Biegewerkzeug ausgeführt (Patentanspruch 10). Insbesondere gestatten Mehrniveau-Biegewerkzeuge dieser Art die Bearbeitung von Werkstücken mit unterschiedlichen Querschnitten, ohne dass zu diesem Zweck ein Werkzeugwechsel im eigentlichen Sinne erforderlich wäre. Ändert sich etwa bei der Rohrbearbeitung der Durchmesser des zu bearbeitenden Rohres, so ist das Mehrniveau-Biegewerkzeug lediglich mit demjenigen Niveau, dessen Biegewerkzeugteile auf den geänderten Rohrdurchmesser abgestimmt sind, auf Höhe des betreffenden Rohres anzuordnen.In a further preferred embodiment of the invention, the bending tool is designed as a multi-level bending tool (claim 10). In particular, multi-level bending tools of this type allow the machining of workpieces with different cross-sections, without a tool change in the true sense would be required for this purpose. If, for example, the diameter of the pipe to be machined changes during tube processing, then the multi-level bending tool is to be arranged at the level of the pipe in question only at that level whose bending tool parts are matched to the changed pipe diameter.

Nachstehend wird die Erfindung anhand schematischer Darstellungen zu einem Ausführungsbeispiel näher erläutert. Es zeigen:

Figur 1:
ein Biegewerkzeug zum Rollbiegen sowie zum Ziehbiegen in der Draufsicht auf eine Rollbiegeanordnung,
Figur 2:
das Biegewerkzeug gemäß Figur 1 in der Draufsicht auf eine Klemmbackenanordnung,
Figuren 3a, 3b, 4a, 4b:
das Biegewerkzeug gemäß den Figuren 1 und 2 als Teil einer Biegevorrichtung beim Rollbiegen,
Figuren 5a, 5b, 6a, 6b:
das Biegewerkzeug gemäß den Figuren 1 bis 4b als Teil einer Biegevorrichtung beim Ziehbiegen,
Figur 7:
das Biegewerkzeug gemäß den Figuren 1 bis 6b in der Offenstellung vor Beginn eines Rollbiegevorgangs und
Figur 8:
das Biegewerkzeug gemäß den Figuren 1 bis 7 in der Offenstellung vor Beginn eines Ziehbiegevorgangs.
The invention will be explained in more detail with reference to schematic representations of an embodiment. Show it:
FIG. 1:
a bending tool for roll bending and drawing bending in the plan view of a roll bending arrangement,
FIG. 2:
the bending tool according to FIG. 1 in the plan view of a jaw assembly,
FIGS. 3a, 3b, 4a, 4b:
the bending tool according to the Figures 1 and 2 as part of a bending device during roll bending,
FIGS. 5a, 5b, 6a, 6b:
the bending tool according to the Figures 1 to 4b as part of a bending device during draw bending,
FIG. 7:
the bending tool according to the Figures 1 to 6b in the open position before the start of a roll bending process and
FIG. 8:
the bending tool according to the FIGS. 1 to 7 in the open position before the beginning of a Ziehbiegevorgangs.

Gemäß Figur 1 umfasst ein Biegewerkzeug 1 zum Bearbeiten von Rohren einen Biegekern 2 mit Werkstückanlagen in Form von Biegematrizen 3, 4, 5. Diese liegen in Richtung einer Biegeachse 6 übereinander und besitzen in Umfangsrichtung des Biegekerns 2 verlaufende Matrizennuten 7, 8, 9.According to FIG. 1 a bending tool 1 for machining pipes comprises a bending core 2 with workpiece installations in the form of bending dies 3, 4, 5. These lie one above the other in the direction of a bending axis 6 and have die grooves 7, 8, 9 extending in the circumferential direction of the bending core 2.

Bei dem Biegewerkzeug 1 handelt es sich demnach um ein Mehrniveau-Biegewerkzeug mit insgesamt drei Biegewerkzeugniveaus. Da das Biegewerkzeug 1 für die Bearbeitung von Rohren mit Kreisquerschnitt vorgesehen ist, besitzen die Matrizennuten 7, 8, 9 an dem Biegekern 2 im Querschnitt eine Halbkreisform. Der Halbkreisradius des Querschnittes der Matrizennuten 7, 8, 9 variiert. Infolgedessen können auf den verschiedenen Biegewerkzeugniveaus des Biegewerkzeuges 1 Rohre mit unterschiedlichen Durchmessern bearbeitet werden. Eine von den dargestellten Verhältnissen abweichende Anzahl von Biegewerkzeugniveaus sowie Matrizennuten mit einer von dem gezeigten Halbkreisquerschnitt abweichenden Querschnittsform sind denkbar.The bending tool 1 is therefore a multi-level bending tool with a total of three bending tool levels. Since the bending tool 1 is provided for processing tubes having a circular cross-section, the die grooves 7, 8, 9 on the bending core 2 have a semicircular shape in cross-section. The semicircular radius of the cross section of the die grooves 7, 8, 9 varies. As a result, tubes of different diameters can be machined on the various bending tool levels of the bending tool 1. A number of bending tool levels deviating from the illustrated ratios, as well as die grooves with a cross-sectional shape deviating from the semicircular cross section shown, are conceivable.

Zusätzlich zu dem Biegekern 2 ist ausweislich Figur 1 als weiterer Teil des Biegewerkzeuges 1 eine Rollbiegeanordnung 10 vorgesehen. Diese weist als Rollbiegeorgane Biegerollen 11, 12, 13 auf, die an einem Biegerollenschlitten 14 um eine Biegerollenachse 15 drehbar gelagert sind. Die Biegerollenachse 15 der Rollbiegeanordnung 10 verläuft parallel zu der Biegeachse 6 an dem Biegekern 2. Die Biegerolle 11 ist mit einer Rollenumfangsnut 16, die Biegerolle 12 mit einer Rollenumfangsnut 17 und die Biegerolle 13 mit einer Rollenumfangsnut 18 versehen. Die Biegerolle 11 ist der Biegematrize 3, die Biegerolle 12 der Biegematrize 4 und die Biegerolle 13 der Biegematrize 5 zugeordnet. Der Querschnitt der Rollenumfangsnuten 16, 17, 18 entspricht dem Querschnitt der jeweils zugeordneten Matrizennut 7, 8, 9. Die beiderseitigen Halbkreisquerschnitte der einander zugeordneten Matrizennuten 7, 8, 9 und Rollenumfangsnuten 16, 17, 18 ergänzen sich annähernd zu dem Kreisquerschnitt des jeweils zu bearbeitenden Rohres. Anstelle der drehbaren Biegerollen 11, 12, 13 können als Rollbiegeorgane auch starre Biegefinger vorgesehen sein.In addition to the bending core 2 is shown FIG. 1 as a further part of the bending tool 1, a roll bending assembly 10 is provided. This has as Rollbiegeorgane bending rollers 11, 12, 13 which are rotatably mounted on a bending roller carriage 14 about a bending roller axis 15. The bending roller shaft 15 of the roll bending assembly 10 is parallel to the bending axis 6 on the bending core 2. The bending roller 11 is provided with a Rollenumfangsnut 16, the bending roller 12 with a Rollenumfangsnut 17 and the bending roller 13 with a Rollenumfangsnut 18. The bending roller 11 is associated with the bending die 3, the bending roller 12 of the bending die 4 and the bending roller 13 of the bending die 5. The cross section of the roller circumferential grooves 16, 17, 18 corresponds to the cross section of the respective associated die groove 7, 8, 9. The mutual half-circular cross sections of the mutually associated die grooves 7, 8, 9 and roller circumferential grooves 16, 17, 18 complement each other approximately to the circular cross section of each machining pipe. Instead of the rotatable bending rollers 11, 12, 13 can be provided as a roll bending organs and rigid bending fingers.

Der Biegerollenschlitten 14 der Rollbiegeanordnung 10 ist an einem ersten Schwenkträger 19 in Richtung eines Doppelpfeils 20 und damit in radialer Richtung der Biegeachse 6 verschiebbar geführt. Der erste Schwenkträger 19 ist seinerseits um eine Rollbiege-Schwenkachse 21 schwenkbar und dabei relativ zu dem Biegekern 2 beweglich. Die Rollbiege-Schwenkachse 21 des ersten Schwenkträgers 19 fällt mit der Biegeachse 6 zusammen. Ein Doppelpfeil 22 veranschaulicht die Richtung der Schwenkbeweglichkeit des ersten Schwenkträgers 19 und somit auch der Rollbiegeanordnung 10.The bending roller carriage 14 of the roll bending arrangement 10 is displaceably guided on a first pivoting support 19 in the direction of a double arrow 20 and thus in the radial direction of the bending axis 6. The first pivot support 19 is in turn pivotable about a roll bending pivot axis 21 and thereby movable relative to the bending core 2. The roll bending pivot axis 21 of the first pivot support 19 coincides with the bending axis 6. A double arrow 22 illustrates the direction of the pivoting mobility of the first pivot support 19 and thus also of the roll bending arrangement 10.

Der Rollbiegeanordnung 10 unmittelbar benachbart ist als dritter Teil des Biegewerkzeuges 1 eine Klemmbackenanordnung 23.The roll bending assembly 10 immediately adjacent is the third part of the bending tool 1 a jaw assembly 23rd

Wie insbesondere aus Figur 2 ersichtlich ist, umfasst die Klemmbackenanordnung 23 drei in Richtung der Biegeachse 6 übereinander liegende Klemmbacken 24, 25, 26. Letztere sind an einem Klemmbackenschlitten 27 angebracht. Die Klemmbacke 24 ist der Biegematrize 3, die Klemmbacke 25 der Biegematrize 4 und die Klemmbacke 26 der Biegematrize 5 zugeordnet. Klemmbackennuten 28, 29, 30 besitzen Halbkreisquerschnitte, die sich mit den Halbkreisquerschnitten der zugeordneten Matrizennuten 7, 8, 9 jeweils annähernd zu dem Kreisquerschnitt des zu bearbeitenden Rohres ergänzen. Nahe der Klemmbackennut 28 ist die Klemmbacke 24 mit einem Rücksprung versehen. Dieser Rücksprung dient bei der Werkstückbearbeitung zur Aufnahme von Anbauteilen oder radialen Aufweitungen des zu biegenden Rohres.As in particular from FIG. 2 it can be seen, the jaw assembly 23 comprises three in the direction of the bending axis 6 superimposed Jaws 24, 25, 26. The latter are attached to a jaw carriage 27. The clamping jaw 24 is assigned to the bending die 3, the clamping jaw 25 to the bending die 4 and the clamping jaw 26 to the bending die 5. Jaw grooves 28, 29, 30 have semicircular cross sections, which complement each other with the semicircular cross sections of the associated die grooves 7, 8, 9 approximately to the circular cross section of the pipe to be machined. Near the jaw groove 28, the jaw 24 is provided with a recess. This recess is used in workpiece machining for receiving attachments or radial widening of the pipe to be bent.

Der Klemmbackenschlitten 27 ist an einem zweiten Schwenkträger 31 in Richtung eines Doppelpfeils 32 verschiebbar geführt. Gemeinschaftlich mit dem Biegekern 2 lässt sich der zweite Schwenkträger 31 um die Biegeachse 6 bewegen. Die Drehbeweglichkeit des Biegekerns 2 sowie die Schwenkbeweglichkeit des zweiten Schwenkträgers 31 mit der Klemmbackenanordnung 23 werden gleichfalls durch den Doppelpfeil 22 veranschaulicht.The jaw carriage 27 is slidably guided on a second pivot carrier 31 in the direction of a double arrow 32. Together with the bending core 2, the second pivot carrier 31 can be moved about the bending axis 6. The rotational mobility of the bending core 2 and the pivoting mobility of the second pivot support 31 with the jaw assembly 23 are also illustrated by the double arrow 22.

Bei der WerkstĂĽckbearbeitung nach dem Ziehbiegeverfahren wirken die Klemmbacken 24, 25, 26 der Klemmbackenanordnung 23 mit ihnen gegenĂĽberliegenden geradlinigen Abschnitten der Biegematrizen 3, 4, 5 an dem Biegekern 2 zusammen. Entsprechend werden zur WerkstĂĽckumformung nach dem Rollbiegeverfahren die Biegerollen 11, 12, 13 der Rollbiegeanordnung 10 gemeinschaftlich mit den gebogenen Abschnitten der Biegematrizen 3, 4, 5 genutzt.In the workpiece processing according to the drawing bending process, the clamping jaws 24, 25, 26 of the jaw assembly 23 cooperate with opposite rectilinear sections of the bending dies 3, 4, 5 on the bending core 2 together. Correspondingly, the bending rollers 11, 12, 13 of the roll bending arrangement 10 are shared with the bent portions of the bending dies 3, 4, 5 used for workpiece forming by the roll bending process.

In den Figuren 3a bis 8 ist das Biegewerkzeug 1 stark schematisiert wiedergegeben. Konstruktive Details des Biegewerkzeuges 1 sind weitgehend ausgespart.In the FIGS. 3a to 8 the bending tool 1 is shown very schematically. Constructive details of the bending tool 1 are largely omitted.

Wie beispielsweise aus Figur 3a hervorgeht, ist das Biegewerkzeug 1 gemeinsam mit dem ersten Schwenkträger 19 und dem zweiten Schwenkträger 31 an einem als Konsole 33 ausgeführten Werkzeugträger montiert. Die Konsole 33 ist mittels eines nicht im Einzelnen gezeigten Kreuzschlittens auf dem Untergrund in Richtung zweier senkrecht zueinander verlaufender Achsen 34, 35 verfahrbar. Zwischen der Konsole 33 und dem nicht dargestellten Kreuzschlitten ist ein Konsolen-Drehantrieb 36 vorgesehen. Dieser umfasst ein Getriebegehäuse 37 sowie einen daran angeflanschten Antriebsmotor 38. Mittels des Konsolen-Drehantriebes 36 ist die Konsole 33 um eine Werkzeugdrehachse 39 drehbar. Die Werkzeugdrehachse 39 fällt mit der Biegeachse 6 sowie mit der Rollbiege-Schwenkachse 21 zusammen.Like, for example FIG. 3a shows, the bending tool 1 is mounted together with the first pivot support 19 and the second pivot support 31 on a designed as a console 33 tool carrier. The bracket 33 is movable by means of a cross slide not shown in detail on the ground in the direction of two mutually perpendicular axes 34, 35. Between the bracket 33 and the cross slide, not shown, a console rotary drive 36 is provided. This includes a gear housing 37 and a drive motor 38 flanged thereto. By means of the console rotary drive 36, the bracket 33 is rotatable about a tool axis of rotation 39. The tool axis of rotation 39 coincides with the bending axis 6 and with the roll bending pivot axis 21.

Ein Rollbiegeantrieb 40 ist an der Konsole 33 angebracht. Teil des Rollbiegeantriebes 40 ist ein an die Konsole 33 angeflanschter Antriebsmotor 41, mittels dessen der erste Schwenkträger 19 um die Rollbiege-Schwenkachse 21 beziehungsweise die Biegeachse 6 geschwenkt werden kann.A roll bending drive 40 is attached to the bracket 33. Part of the roll bending drive 40 is a drive motor 41 flanged to the bracket 33, by means of which the first pivot support 19 can be pivoted about the roll bending pivot axis 21 or the bending axis 6.

Gemeinsam mit dem Rollbiegeantrieb 40, sowie dem ersten Schwenkträger 19 und dem zweiten Schwenkträger 31 ist das Biegewerkzeug 1 an der Konsole 33 in Richtung eines Doppelpfeils 42 auf und ab verfahrbar. Zu diesem Zweck vorgesehen ist ein Verfahrantrieb 43 mit einem in den Darstellungen verdeckt liegenden Antriebsmotor 44.Together with the roll bending drive 40, and the first pivot support 19 and the second pivot support 31, the bending tool 1 on the bracket 33 in the direction of a double arrow 42 is moved up and down. Provided for this purpose is a travel drive 43 with a drive motor 44 hidden in the representations.

Oberhalb der Konsole 33 und in unmittelbarer Nähe des Biegewerkzeuges 1 ist unter anderem in Figur 3a eine Werkstückeinspannung in Form eines herkömmlichen Schwenkgreifers 45 abgebildet. Mit Hilfe des Schwenkgreifers 45 können zu bearbeitende Werkstücke dem Biegewerkzeug 1 zugeführt und bearbeitete Werkstücke von dem Biegewerkzeug 1 abtransportiert werden. Außerdem ist der Schwenkgreifer 45 in der Lage, an ihm eingespannte Werkstücke, in dem dargestellten Beispielsfall ein Rohr 46, um eine Werkstückachse beziehungsweise eine Rohrachse 47 zu drehen.Above the console 33 and in the immediate vicinity of the bending tool 1 is inter alia in FIG. 3a a Werkstückeinspannung shown in the form of a conventional pivoting gripper 45. With the aid of the pivoting gripper 45, workpieces to be processed can be fed to the bending tool 1 and processed workpieces can be transported away from the bending tool 1. In addition, the pivotal gripper 45 is capable of it clamped workpieces, in the illustrated example, a tube 46 to rotate a workpiece axis or a tube axis 47.

Die Gesamtanordnung bildet eine Biegevorrichtung, mittels derer Rohre 46 sowohl nach dem Rollbiegeverfahren als auch nach dem Ziehbiegeverfahren bearbeitet werden können.The overall arrangement forms a bending device by means of which tubes 46 can be processed both by the roll bending method and by the drawing bending method.

Im Einzelnen sind die Abläufe beim Rollbiegen in den Figuren 3a, 3b, 4a, 4b, die Abläufe bei Ziehbiegen in den Figuren 5a, 5b, 6a, 6b dargestellt,Specifically, the processes of roll bending in the FIGS. 3a, 3b, 4a, 4b , the processes in drawing bending in the FIGS. 5a, 5b, 6a, 6b shown,

Vor Beginn eines Rollbiegevorganges befindet sich die Gesamtanordnung in dem Betriebszustand gemäß Figur 7. Das Biegewerkzeug 1 ist geöffnet, ein zu bearbeitendes Rohr 46 wurde durch entsprechende Relativbewegung von Schwenkgreifer 45 und Biegewerkzeug 1 in das offene Biegewerkzeug 1 eingelegt. Zu diesem Zweck wurde die Konsole 33 mit dem geöffneten Biegewerkzeug 1 in Richtung der Vertikalachse beziehungsweise des Doppelpfeils 42 sowie in Richtung der Horizontalachse 35 gegenüber dem an dem Schwenkgreifer 45 gehaltenen Rohr 46 verfahren. Für die Umformung des Rohres 46 genutzt wird das unterste Biegewerkzeugniveau des Biegewerkzeuges 1.Before the beginning of a roll bending process, the overall arrangement is in the operating state according to FIG. 7 , The bending tool 1 is open, a pipe to be machined 46 was inserted by appropriate relative movement of the pivoting gripper 45 and bending tool 1 in the open bending tool 1. For this purpose, the console 33 was moved with the open bending tool 1 in the direction of the vertical axis or the double arrow 42 and in the direction of the horizontal axis 35 relative to the tube 46 held on the pivoting gripper 45. The lowermost bending tool level of the bending tool 1 is used for the deformation of the tube 46.

Ausgehend von den Verhältnissen gemäß Figur 7 wird das Biegewerkzeug 1 geschlossen. Zu diesem Zweck werden mittels eines nicht im Einzelnen gezeigten Verfahrantriebes die Rollbiegeanordnung 10 auf dem ersten Schwenkträger 19 und die Klemmbackenanordnung 23 auf dem zweiten Schwenkträger 31 in Querrichtung der Rohrachse 47 zu dem Biegekern 2 hin bewegt. Am Ende der Verfahrbewegung der Rollbiegeanordnung 10 sowie der Klemmbackenanordnung 23 wird das Rohr 46 von der Matrizennut 9 der Biegematrize 5 einerseits und der Rollenumfangsnut 18 der Biegerolle 13 sowie der Klemmbackennut 30 der Klemmbacke 26 andererseits in Umfangsrichtung annähernd vollständig umschlossen. Zwischen der Biegematrize 5 und der Klemmbacke 26 ist das Rohr 46 dabei geklemmt. Die Klemmbacke 26 und die Biegerolle 13 befinden sich in ihrer Funktionsstellung. Alles in allem ergibt sich die in den Figuren 3a und 3b veranschaulichte Betriebssituation.Based on the conditions according to FIG. 7 the bending tool 1 is closed. For this purpose, the roll bending assembly 10 on the first pivot support 19 and the jaw assembly 23 are moved on the second pivot support 31 in the transverse direction of the tube axis 47 to the bending core 2 by means of a not shown in detail traversing drive. At the end of the travel movement of the roll bending assembly 10 and the jaw assembly 23, the tube 46 is approximately completely enclosed by the die groove 9 of the bending die 5 on the one hand and the Rollenumfangsnut 18 of the bending roller 13 and the jaw groove 30 of the jaw 26 on the other hand in the circumferential direction. Between the bending die 5 and the jaw 26, the tube 46 is clamped. The jaw 26 and the bending roller 13 are in their functional position. All in all, the results in the FIGS. 3a and 3b illustrated operating situation.

Durch entsprechende Betätigung des Rollbiegeantriebes 40 wird nun der erste Schwenkträger 19 gemeinschaftlich mit der auf diesem aufsitzenden Rollbiegeanordnung 10 um die Biegeachse 6 beziehungsweise die Rollbiege-Schwenkachse 21 geschwenkt (Figuren 4a, 4b). Die Schwenkrichtung der Rollbiegeanordnung 10 ist in Figur 4a durch einen Pfeil oberhalb des Biegewerkzeuges 1 angedeutet. Der Schwenkwinkel beträgt in dem dargestellten Beispielsfall 90°. Bei ihrer Schwenkbewegung rollt die Rollbiegeanordnung 10 mit der Biegerolle 13 auf dem Rohr 46 ab. Das Rohr 46 wird um den Biegekern 2 mit einer Rechtsbiegung von 90° gebogen. Aufgrund der Klemmung durch die Biegematrize 5 und die Klemmbacke 26, welche längs der Rohrachse 47 neben der Biegerolle 13 angeordnet ist, wird das Rohr 46 während des Rollbiegevorgangs insbesondere in Längsrichtung der Rohrachse 47 sicher in seiner Solllage fixiert.By corresponding actuation of the roll bending drive 40, the first pivot support 19 is now pivoted jointly with the roll bending arrangement 10 resting thereon about the bending axis 6 or the roll bending pivot axis 21 ( FIGS. 4a, 4b ). The pivoting direction of the roll bending assembly 10 is in FIG. 4a indicated by an arrow above the bending tool 1. The swivel angle is 90 ° in the illustrated example case. During its pivoting movement, the roll bending arrangement 10 rolls with the bending roller 13 on the tube 46. The tube 46 is bent around the bending core 2 with a right bend of 90 °. Due to the clamping by the bending die 5 and the jaw 26, which is arranged along the tube axis 47 next to the bending roller 13, the tube 46 is securely fixed during the roll bending operation, in particular in the longitudinal direction of the tube axis 47 in its desired position.

Nach Erstellen der gewünschten Biegung wird der erste Schwenkträger 19 mit der Rollbiegeanordnung 10 in seine Ausgangslage gemäß den Figuren 3a und 3b zurückgeschwenkt. Das Biegewerkzeug 1 wird geöffnet und das verformte Rohr 46 kann entweder aus dem Biegewerkzeug 1 entnommen oder mittels des Biegewerkzeuges 1 ein weiteres Mal umgeformt werden. Eine weitere Umformung kann entweder erneut nach dem Rollbiegeverfahren oder aber nach dem Ziehbiegeverfahren erstellt werden.After creating the desired bend of the first pivot support 19 with the roll bending assembly 10 in its initial position according to the FIGS. 3a and 3b pivoted back. The bending tool 1 is opened and the deformed tube 46 can either be removed from the bending tool 1 or be formed by means of the bending tool 1 a further time. Further forming can be done either again after the roll bending process or after the drawing bending process.

Soll erneut nach dem Rollbiegeverfahren gearbeitet werden, so ist das bereits mit einer Biegung versehene Rohr 46 gegenüber dem geöffneten Biegewerkzeug 1 in Richtung der Rohrachse 47 nachzusetzen. Das Biegewerkzeug 1 bleibt in unmittelbarer Nähe des Schwenkgreifers 45. Nach dem Schließen des Biegewerkzeuges 1 kann in der vorstehend beschriebenen Weise eine weitere Biegung nach dem Rollbiegeverfahren erstellt werden. Unter Umständen ist das Rohr 46 vor dem Schließen des Biegewerkzeuges 1 mittels des Schwenkgreifers 45 um die Rohrachse 47 zu drehen. Eine derartige Drehbewegung ist dann erforderlich, wenn die erste und die zweite Biegung des Rohres 46 in unterschiedlichen Ebenen liegen müssen.If you want to work again after the roll bending process, then the already provided with a bend tube 46 relative to the open bending tool 1 in the direction of the tube axis 47 nachsetzen. The bending tool 1 remains in the immediate vicinity of the pivoting gripper 45th Nach the closing of the bending tool 1 can be created in the manner described above, a further bend after the roll bending process. Under certain circumstances, the tube 46 before the closing of the bending tool 1 by means of the pivoting gripper 45 to rotate about the tube axis 47. Such a rotational movement is required when the first and the second bend of the tube 46 must lie in different planes.

Soll an dem Rohr 46 von Anfang an oder im Anschluss an die Umformung nach dem Rollbiegeverfahren eine Biegung nach dem Ziehbiegeverfahren erstellt werden, so ist das Biegewerkzeug 1 ausgehend von den Verhältnissen gemäß den Figuren 3a und 3b zu öffnen und anschließend mittels des Verfahrantriebes 43 gegenüber dem Rohr 46 so weit abzusenken, bis das Biegewerkzeug 1 unterhalb des Rohres 46 zu liegen kommt. Anschließend wird die Konsole 33 und mit dieser das Biegewerkzeug 1 mittels des Konsolen-Drehantriebes 36 um 180° um die Werkzeugdrehachse 39 gedreht und dann mittels des den Konsolen-Drehantrieb 36 lagernden Kreuzschlittens so weit in Richtung der Achse 35 verfahren bis sich die Öffnung des geöffneten Biegewerkzeuges 1 unterhalb des Rohres 46 befindet. Wird nun die Konsole 33 durch Betätigen des Verfahrantriebes 43 nach oben bewegt, so läuft das Rohr 46 in die Öffnung des gemeinschaftlich mit der Konsole 33 verfahrenen Biegewerkzeuges 1 ein. Nach einer kurzen Bewegung von Konsole 33 und Biegewerkzeug 1 in Richtung der Achse 35 liegt das Rohr 46 an dem nach wie vor geöffneten Biegewerkzeug 1 in der Matrizennut 9 der Biegematrize 5 an dem Biegekern 2. Es ergibt sich damit die in Figur 8 dargestellte Situation. Während der beschriebenen Bewegung des Biegewerkzeuges 1 ist das Rohr 46 an dem Schwenkgreifer 45 eingespannt.If a bending is to be created on the tube 46 from the beginning or following the forming by the roll bending method according to the drawing bending method, then the bending tool 1 is based on the conditions according to FIGS FIGS. 3a and 3b open and then lower by means of the positioning drive 43 relative to the tube 46 until the bending tool 1 comes to lie below the tube 46. Subsequently, the console 33 and with this the bending tool 1 by means of the console rotary drive 36 is rotated by 180 ° about the tool axis of rotation 39 and then moved by means of the console rotary drive 36 overlapping cross slide so far in the direction of the axis 35 until the opening of the open Bending tool 1 is located below the tube 46. If the console 33 is then moved upward by actuating the travel drive 43, the tube 46 runs into the opening of the bending tool 1, which is jointly moved with the console 33. After a short movement of the bracket 33 and bending tool 1 in the direction of the axis 35, the tube 46 is located on the still open bending tool 1 in the die groove 9 of the bending die 5 on the bending core 2. It thus results in in FIG. 8 illustrated situation. During the described movement of the bending tool 1, the tube 46 is clamped to the swivel gripper 45.

Wird ausgehend von den Verhältnissen gemäß Figur 8 das Biegewerkzeug 1 geschlossen, so ergibt sich der Betriebszustand gemäß den Figuren 5a und 5b. Das Rohr 46 ist zwischen der Biegematrize 5 des Biegekerns 2 und der Klemmbacke 26 der Klemmbackenanordnung 23 geklemmt. Die Biegerolle 13 der Rollbiegeanordnung 10 befindet sich an der von dem Biegekern 2 abliegenden Seite des Rohres 46 in einer Stellung, in welcher sie mit der Wand der Rollenumfangsnut 18 an der Wand des Rohres 46 drucklos anliegt.Is based on the conditions according to FIG. 8 the bending tool 1 is closed, then the operating state results according to the FIGS. 5a and 5b , The tube 46 is clamped between the bending die 5 of the bending core 2 and the jaw 26 of the jaw assembly 23. The bending roller 13 of the roll bending assembly 10 is located on the side remote from the bending core 2 side of the tube 46 in a position in which it bears against the wall of the roller circumferential groove 18 on the wall of the tube 46 without pressure.

Nun wird unter Betätigung des Konsolen-Drehantriebes 36 die Konsole 33 in Richtung des in Figur 6a unterhalb des Konsolen-Drehantriebes 36 eingezeichneten Pfeils um die Werkzeugdrehachse 39 gedreht. Gleichzeitig führt der ersten Schwenkträger 19 mit der Rollbiegeanordnung 10 eine mittels des Rollbiegeantriebes 40 bewirkte und durch den oberen Pfeil in Figur 6a veranschaulichte Gegen-Drehbewegung um die Werkzeugdrehachse 39 aus. Demzufolge verbleibt der ersten Schwenkträger 19 mit der Rollbiegeanordnung 10 in seiner Ausgangslage bezüglich der Werkzeugdrehachse 39, während die Klemmbackenanordnung 23 um die Werkzeugdrehachse 39 in Richtung des in Figur 6a unteren Pfeiles schwenkt. Mit der Schwenkbewegung der Klemmbackenanordnung 23 geht eine Drehbewegung des Biegekerns 2 um die Werkzeugdrehachse 39 beziehungsweise die Biegeachse 6 einher. Das zwischen der Biegematrize 5 des Biegekerns 2 und der Klemmbacke 26 der Klemmbackenanordnung 23 geklemmte Rohr 46 wird infolgedessen um den Biegekern 2 gezogen. Die Biegerolle 13 der Rollbiegeanordnung 10 stützt dabei das Rohr 46 seitlich ab. Die Biegerolle 13 der Rollbiegeanordnung 10 übernimmt damit die Funktion einer Gleitschiene. Da die Einspannung des Rohres 46 an dem Schwenkgreifer 45 vor Beginn des Ziehbiegevorganges aufgehoben worden ist, kann das Rohr 46 die mit dem Ziehbiegevorgang verbundene Längsbewegung ausführen. Auch der Biegewinkel der nach dem Ziehbiegeverfahren erstellten Biegung beträgt 90°. Die Biegerichtung hat sich gegenüber dem zu den Figuren 3a bis 4b beschriebenen Rollbiegevorgang geändert. Mittels Ziehbiegen erstellt wurde eine Linksbiegung.Now, by pressing the console rotary drive 36, the console 33 in the direction of in FIG. 6a below the console rotary drive 36 drawn arrow rotated about the tool axis of rotation 39. At the same time, the first pivoting support 19 with the roll bending arrangement 10 brings about a roll bending drive 40 and causes it to move through the upper arrow FIG. 6a illustrated counter-rotational movement about the tool axis of rotation 39. Consequently, the first pivot support 19 remains with the Rollbiegeanordnung 10 in its initial position with respect to the tool axis of rotation 39, while the jaw assembly 23 about the tool axis of rotation 39 in the direction of FIG. 6a lower arrow swings. With the pivotal movement of the jaw assembly 23 is a rotational movement of the bending core 2 to the tool axis of rotation 39 and the bending axis 6 is accompanied. The clamped between the bending die 5 of the bending core 2 and the jaw 26 of the jaw assembly 23 tube 46 is consequently pulled around the bending core 2. The bending roller 13 of the roll bending assembly 10 supports the tube 46 from the side. The bending roller 13 of the roll bending assembly 10 thus assumes the function of a slide rail. Since the clamping of the tube 46 on the pivoting gripper 45 has been canceled before the beginning of the drawing bending operation, the tube 46 can perform the longitudinal movement associated with the drawing bending operation. The bending angle of the bend created by the drawing bending process is also 90 °. The bending direction has towards the to FIGS. 3a to 4b changed roll bending process described. By means of drawing bending was created a left bend.

Nach Beendigung des Ziehbiegevorganges wird die Klemmbacke 26 gegenüber dem Biegekern 2 zurückgezogen, ehe dann der zweite Schwenkträger 31 durch entsprechende Drehbewegung der Konsole 33 um die Werkzeugdrehachse 39 in seine Ausgangsdrehstellung gemäß Figur 5a zurückgeschwenkt wird. Auch bei dieser Schwenkbewegung der Konsole 33 führt der erste Schwenkträger 19, angetrieben von dem Rollbiegeantrieb 40, eine Ausgleichs-Schwenkbewegung in Gegenrichtung aus. Zuletzt liegen der zweite Schwenkträger 31 mit der Klemmbackenanordnung 23 und der erste Schwenkträger 19 mit der Rollbiegeanordnung 10 wieder parallel zueinander in der Schwenkposition gemäß Figur 5a. Wird nun die Rollbiegeanordnung 10 ebenfalls in Öffnungsrichtung des Biegewerkzeuges 1 bewegt, so ist das Biegewerkzeug 1 insgesamt geöffnet und das Rohr 46 kann entweder aus dem Biegewerkzeug 1 entnommen werden oder aber in Längsrichtung des Biegewerkzeuges 1 zugestellt und dadurch für einen weiteren Biegevorgang positioniert werden.After completion of the Ziehbiegevorganges the jaw 26 is withdrawn relative to the bending core 2, then before the second pivot carrier 31 by corresponding rotational movement of the bracket 33 about the tool axis of rotation 39 in its initial rotational position according to FIG. 5a is pivoted back. Also in this pivotal movement of the bracket 33, the first pivot support 19, driven by the roll bending drive 40, carries out a compensation pivoting movement in the opposite direction. Finally, the second pivoting support 31 with the clamping jaw arrangement 23 and the first pivoting support 19 with the roll bending arrangement 10 are again parallel to one another in the pivoting position FIG. 5a , If now the roll bending assembly 10 is also moved in the opening direction of the bending tool 1, the bending tool 1 is opened and the tube 46 can either be removed from the bending tool 1 or delivered in the longitudinal direction of the bending tool 1 and thereby positioned for a further bending operation.

Zur Positionierung des Biegewerkzeuges 1 gegenüber dem Rohr 46 dient im Übrigen auch die Beweglichkeit der Konsole 33 in Richtung der Achse 34. Aufgrund dieser Längsbeweglichkeit sowie unter Ausnutzung ihrer Querbeweglichkeit in Richtung des Doppelpfeils 42 kann die Konsole 33 mit dem Biegewerkzeug 1 von einer Seite des Schwenkgreifers 45 auf dessen gegenüberliegende Seite verfahren. Wird das Biegewerkzeug 1 etwa ausgehend von den Verhältnissen gemäß Figur 3a geöffnet, mittels des Verfahrantriebes 43 abgesenkt und nach dem Verfahren in Richtung der Achse 34 an der gegenüberliegenden Seite des Schwenkgreifers 45 mittels des Verfahrantriebes 43 wieder angehoben, so kann das Rohr 46 nach einer abschließenden Feinpositionierung und dem Schließen des Biegewerkzeuges 1 nach dem Ziehbiegeverfahren bearbeitet werden. Ist die beschriebene Verfahrbewegung der Konsole 33 beziehungsweise des Biegewerkzeuges 1 zusätzlich kombiniert mit einer 180°-Drehung der Konsole 33 um die Werkzeugdrehachse 39, so kann an der gegenüberliegenden Seite des Schwenkgreifers 45 eine Biegung nach dem Rollbiegeverfahren erstellt werden.For the positioning of the bending tool 1 relative to the tube 46 also serves the mobility of the bracket 33 in the direction of the axis 34. Due to this longitudinal mobility and taking advantage of their transverse mobility in the direction of the double arrow 42, the console 33 with the bending tool 1 from one side of the pivoting gripper 45 proceed on the opposite side. If the bending tool 1 is approximately based on the conditions according to FIG. 3a opened, lowered by means of the positioning drive 43 and raised again by the method in the direction of the axis 34 on the opposite side of the pivoting gripper 45 by means of the positioning drive 43, the tube 46 can be processed after a final fine positioning and the closing of the bending tool 1 by the drawing bending process , Is the described movement of the bracket 33 and the bending tool 1 in addition combined with a 180 ° rotation of the console 33 about the tool axis of rotation 39, 45 can be created on the opposite side of the pivoting gripper bending by the roll bending process.

Soll ein Rohr mit einem von dem Durchmesser des Rohres 46 abweichenden Durchmesser bearbeitet werden, so ist das Biegewerkzeug 1 mittels des Verfahrantriebes 43 derart zu positionieren, dass die Werkzeugteile des betreffenden Biegewerkzeugniveaus auf Höhe des zu bearbeitenden Rohres zu liegen kommen.If a pipe with a diameter deviating from the diameter of the pipe 46 is to be machined, then the bending tool 1 is to be positioned by means of the travel drive 43 in such a way that the tool parts of the relevant bending tool level come to rest at the height of the pipe to be machined.

Claims (11)

  1. Device for bending bar-like and/or rod-like workpieces, especially pipes (46), having a bending tool (1) which comprises a bending core (2) and a clamping jaw arrangement (23), wherein the bending core (2) is rotatable about a bending axis (6) extending in the transverse direction of the workpiece axis (47) and the clamping jaw arrangement (23) has a clamping jaw (24, 25, 26) which may be advanced relative to the bending core (2) in the transverse direction of both the workpiece axis (47) and the bending axis (6) into an operative position, wherein, when the clamping jaw (24, 25, 26) is in the operative position, a workpiece may be clamped between the bending core (2) and the clamping jaw (24, 25, 26) and wherein, when the workpiece is clamped between the bending core (2) and the clamping jaw (24, 25, 26), the bending core (2) is rotatable about the bending axis (6) and, together therewith, the clamping jaw (24, 25, 26) is pivotable about the bending axis (6) and in that manner the workpiece may be drawn about the bending core (2), characterised in that the bending tool (1) comprises a curling arrangement (10) for working workpieces by the curling method, having a curling member (11, 12, 13) which is arranged along the workpiece axis (47) beside the clamping jaw (24, 25, 26) and with which the side of the workpiece remote from the bending core (2) may be associated, wherein the curling member (11, 12, 13) is pivotable about a curling pivot axis (21) with a bending pivoting motion about the bending core (2) to apply a bending action to the workpiece arranged between the bending core (2) and the curling member (11, 12, 13).
  2. Device according to claim 1, characterised in that the bending axis (6) and the curling pivot axis (21) coincide with each other.
  3. Device according to either of the preceding claims, characterised in that, when the clamping jaw (24, 25, 26) is in the operative position, the curling member (11, 12, 13) is pivotable with a bending pivoting motion about the bending core (2).
  4. Device according to any one of the preceding claims, characterised in that, as the bending core (2) and the clamping jaw (24, 25, 26) rotate and pivot together about the bending axis (6), the curling member (11, 12, 13) is able to adopt in the transverse direction of the workpiece axis (47) a position in which the workpiece may be supported by means of the curling member (11, 12, 13) in the transverse direction of the workpiece axis (47) at the side remote from the bending core (2).
  5. Device according to any one of the preceding claims, characterised in that the bending tool (1) is rotatable about a tool rotation axis (39) extending parallel to the bending axis (6).
  6. Device according to any one of the preceding claims, characterised in that the clamping jaw (24, 25, 26) and the curling member (11, 12, 13) are movable relative to the bending core (2) into an inoperative position in which the bending tool (1) is open, and, in the inoperative position of the clamping jaw (24,25,26) and the curling member (11, 12, 13), the bending tool (1) is movable along the bending axis (6) and in the transverse direction of the workpiece axis (47).
  7. Device according to any one of the preceding claims, characterised in that the bending tool (1) is movable along the workpiece axis (47).
  8. Device according to any one of the preceding claims, characterised in that the bending axis (6) and/or the curling pivot axis (21), on the one hand, and the tool rotation axis (39), on the other hand, coincide with one another, and the bending core (2) and the clamping jaw (24, 25, 26) are respectively rotatable and pivotable together about the bending axis (6) and/or the curling member (11, 12, 13) is pivotable about the curling pivot axis (21) by means of the bending core (2) and the clamping jaw (24, 25, 26) being respectively rotatable and pivotable together about the tool rotation axis (39) and/or by means of the curling member (11, 12, 13) being pivotable about the tool rotation axis (39), wherein, when the bending core (2) and the clamping jaw (24, 25, 26) are caused to rotate or pivot together by being rotated or pivoted about the tool rotation axis (39), the curling member (11, 12, 13) is able to execute a compensatory pivoting motion about the tool rotation axis (39) and, when the curling member (11, 12, 13) is caused to pivot by being pivoted about the tool rotation axis (39), the bending core (2) and the clamping jaw (24, 25, 26) are able to execute a compensatory rotational or pivoting motion about the tool rotation axis (39).
  9. Device according to any one of the preceding claims, characterised in that the bending tool (1) is mounted on a tool support (33) which is in turn rotatable about the tool rotation axis (39).
  10. Device according to any one of the preceding claims, characterised in that the bending tool (1) is in the form of a multi-level bending tool by virtue of the bending core (2) having on its outer side which is parallel to the bending axis a plurality of workpiece rests (3, 4, 5) arranged one above another in the direction of the bending axis (6), the clamping jaw arrangement (23) having a plurality of clamping jaws (24, 25, 26) arranged one above another in the direction of the bending axis (6) and the curling arrangement (10) having a plurality of curling members (11, 12, 13) arranged one above another in the direction of the curling pivot axis (21), wherein a bending tool level comprises in each case one workpiece rest (3, 4, 5) of the bending core (2), one associated clamping jaw (24, 25, 26) of the clamping jaw arrangement (23) and one curling member (11, 12, 13) of the curling arrangement (10), which curling member (11, 12, 13) is arranged along the workpiece axis (47) beside the relevant clamping jaw (24, 25, 26).
  11. Bending tool for a device for bending bar-like and/or rod-like workpieces, especially pipes (46), having a bending core (2) and a clamping jaw arrangement (23), wherein the bending core (2) is rotatable about a bending axis (6) extending in the transverse direction of the workpiece axis (47) and the clamping jaw arrangement (23) has a clamping jaw (24, 25, 26) which may be advanced relative to the bending core (2) in the transverse direction of both the workpiece axis (47) and the bending axis (6) into an operative position, wherein, when the clamping jaw (24. 25, 26) is in the operative position, a workpiece may be clamped between the bending core (2) and the clamping jaw (24, 25, 26) and wherein, when the clamping jaw (24, 25, 26) is in the operative position, the bending core (2) is rotatable about the bending axis (6) and, together therewith, the clamping jaw (24, 25, 26) is pivotable about the bending axis (6), characterised in that a curling arrangement (10) for working workpieces by the curling method is provided, having a curling member (11, 12, 13) which is arranged along the workpiece axis (47) beside the clamping jaw (24, 25, 26) and with which the side of the workpiece remote from the bending core (2) may be associated, wherein the curling member (11, 12, 13) is pivotable about a curling pivot axis (21) with a bending pivoting motion about the bending core (2).
EP06022100A 2006-10-21 2006-10-21 Device for bending bars and/or rod shaped workpieces, in particular pipes, and bending tool for this device Revoked EP1914021B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT06022100T ATE435076T1 (en) 2006-10-21 2006-10-21 DEVICE FOR BENDING ROD AND/OR ROD-LIKE WORKPIECES, IN PARTICULAR TUBES, AND BENDING TOOL FOR SUCH A DEVICE
DE502006004142T DE502006004142D1 (en) 2006-10-21 2006-10-21 Device for bending rod and / or rod-like workpieces, in particular pipes and bending tool for such a device
EP06022100A EP1914021B1 (en) 2006-10-21 2006-10-21 Device for bending bars and/or rod shaped workpieces, in particular pipes, and bending tool for this device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06022100A EP1914021B1 (en) 2006-10-21 2006-10-21 Device for bending bars and/or rod shaped workpieces, in particular pipes, and bending tool for this device

Publications (2)

Publication Number Publication Date
EP1914021A1 EP1914021A1 (en) 2008-04-23
EP1914021B1 true EP1914021B1 (en) 2009-07-01

Family

ID=37875791

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06022100A Revoked EP1914021B1 (en) 2006-10-21 2006-10-21 Device for bending bars and/or rod shaped workpieces, in particular pipes, and bending tool for this device

Country Status (3)

Country Link
EP (1) EP1914021B1 (en)
AT (1) ATE435076T1 (en)
DE (1) DE502006004142D1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3001163B1 (en) * 2013-01-21 2015-05-01 Eaton Leonard Europ DEVICE FOR BENDING PROFILES SUCH AS TUBES
FR3037828A1 (en) * 2015-06-24 2016-12-30 Eaton Leonard Group DEVICE FOR BENDING AND CUTTING PROFILES SUCH AS TUBES
ITUB20153370A1 (en) * 2015-09-03 2017-03-03 C B C S R L PERFECT SLEDGE FOR A BENDING DEVICE FOR LENGTHED TUBULAR ELEMENTS

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1251934B (en) 1991-10-16 1995-05-27 Macchine Curvatubi Crippa Agos MULTIPURPOSE PIPE BENDING MACHINE
JP3966548B2 (en) 2002-12-17 2007-08-29 臼井国際産業株式会社 Pipe bending machine
ITVI20030233A1 (en) * 2003-11-19 2005-05-20 Pedrazzoli Ibp Spa BENDING MACHINE FOR TUBULAR ELEMENTS.
US7134310B2 (en) * 2004-11-30 2006-11-14 Ying Lin Machine Industrial Col., Ltd. Tube bender

Also Published As

Publication number Publication date
EP1914021A1 (en) 2008-04-23
ATE435076T1 (en) 2009-07-15
DE502006004142D1 (en) 2009-08-13

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