EP2177287B1 - Support split assembly for gliding side supports of rod and tube-shape workpieces on bending machines - Google Patents

Support split assembly for gliding side supports of rod and tube-shape workpieces on bending machines Download PDF

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Publication number
EP2177287B1
EP2177287B1 EP08018255A EP08018255A EP2177287B1 EP 2177287 B1 EP2177287 B1 EP 2177287B1 EP 08018255 A EP08018255 A EP 08018255A EP 08018255 A EP08018255 A EP 08018255A EP 2177287 B1 EP2177287 B1 EP 2177287B1
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EP
European Patent Office
Prior art keywords
bending
workpiece
support
support jaw
arrangement according
Prior art date
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EP08018255A
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German (de)
French (fr)
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EP2177287A2 (en
EP2177287A3 (en
Inventor
Jürgen Wolf
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Wafios AG
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Wafios AG
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Publication date
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Priority to AT08018255T priority Critical patent/ATE535323T1/en
Priority to EP08018255A priority patent/EP2177287B1/en
Priority to JP2009226826A priority patent/JP5114464B2/en
Priority to US12/579,990 priority patent/US8359896B2/en
Priority to CN2009101797918A priority patent/CN101722220B/en
Publication of EP2177287A2 publication Critical patent/EP2177287A2/en
Publication of EP2177287A3 publication Critical patent/EP2177287A3/en
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Publication of EP2177287B1 publication Critical patent/EP2177287B1/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
    • 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
    • B21D7/022—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment over a stationary forming member only

Definitions

  • the invention relates to a support jaw assembly for sliding lateral support of rod and tubular workpieces before their entry into the forming groove of a bending disc of a bending head of a bending machine, with two support jaws arranged on both sides of the longitudinal axis of the workpiece to be machined and each facing with a workpiece Forming groove are provided for lateral abutment on this, each support jaw guided longitudinally displaceable on a guide block and can be moved by an associated drive means from an opposite to the transport direction of the workpiece extended end position, in which the support jaws the workpiece in a region of its tangential inlet into the forming groove the bending disc is supported to slide laterally to a point at a predetermined distance from this.
  • Such an arrangement shows the DE 201 18 444 U1 , where there is provided a support jaw, which can be moved along the tubular body and perpendicular to this.
  • this known jaw assembly can only in the case of a one-sided bending of the tubular workpiece can be used, since it allows only on one side support against the bending forces.
  • a device by means of which the workpiece to be machined can be bent right and left, is from the WO 2004/000479 A1 known.
  • a support jaws applied in which case two such support jaws, each for a bending direction, are provided, each having a forming groove for abutment against a side of the workpiece ,
  • the forming grooves on both support jaws, as well as on the bending disc are arranged at different axial height.
  • the swivel arm must be brought into a swivel position rotated by 180 ° so that it can work together on the opposite side of the bending head with the other support jaws present there.
  • This known bending machine is relatively complicated in construction, where the support jaws there must be moved both in the longitudinal direction of the workpiece to be machined, as well as perpendicular to its longitudinal axis.
  • the shape of grooves in the two mold jaws and the respective associated forming grooves on the bending disc at different heights, which also requires a change in the altitude of the overall arrangement relative to the supplied strand-like workpiece when switching the bending direction.
  • the present invention seeks to propose a support jaw assembly that can be used for both right as well as left-hand bending, with a simple conversion and an overall uncomplicated structure is given.
  • a support jaw assembly of the type mentioned in that the two support jaws are always slidably against the side of the workpiece, each support jaw is mounted on a holder on a longitudinally displaceable guided on the guide block support bar, which is displaceable by the associated drive means, wherein the two support strips are driven by the drive means such that when one of the support jaws is in its extended end position, the other support jaws assumes its retracted starting position.
  • the support jaw assembly according to the invention initially has a comparatively simple structural design, in which for changing the bending direction essentially only the generation of a lateral offset of the bending head relative to the longitudinal axis of the workpiece to be machined, for example by a method of bending head to make.
  • the arrangement of a plurality of mold grooves on the bending disc, axially offset from one another, is just as unnecessary as a lateral movability of the support jaws relative to the workpiece.
  • both support bars can be connected to a common drive means by which they can be moved individually or together in opposite directions, what Ober a suitable lever mechanism, counter-rotating spindle drives o.ä. can be realized.
  • each support bar is particularly preferably connected to its own drive device, preferably to a pneumatic cylinder or to a servo drive.
  • the drive device (s) are (are) further connected to a central control, by which the adjustment movements are controlled when changing the bending directions.
  • the support jaws can either be used so that the supporting jaws used for supporting in its use from the starting position transferred immediately into its extended end position and is held immobile during the bending process in this. Equally, however, it is also possible to provide what is easily realizable within the scope of a program control of the drive device (s) that the respectively used support jaw is moved in contact with the workpiece during the bending process until it has reached its extended end position or even over this one piece is continued.
  • each support jaws made of a hard plastic, in particular made of polyamide, which can be achieved in a relative movement between the workpiece and the support jaws particularly low frictional forces.
  • the support jaw assembly according to the invention can preferably be arranged so that the support jaws, their brackets, the support strips, the guide blocks and the drive means are provided symmetrically to the workpiece longitudinal axis, which can be achieved in total a type of two-part and axially movable workpiece guide.
  • the device according to the invention is suitable for the machining of rod-shaped or tubular workpieces, in particular for tubular workpieces from the coil. Moreover, it reliably prevents unwanted and unclean bending, buckling, bulging or the like of the workpiece to be treated, so that only the actually desired deformation of the workpiece at the bending head is permitted.
  • each support jaw is detachably fastened to the associated support strip and is preferably position-adjustable in the direction of the workpiece to be machined.
  • each support jaw is interchangeably mounted on the support carrying it, and is in particular also advantageously arranged in a positionally adjustable manner in the direction of the workpiece to be machined and in its vertical position.
  • each holder is preferably associated with an adjusting device for the support jaws, by means of which this is fine adjustable relative to the holder in the direction perpendicular to the longitudinal axis of the support bar and in its altitude.
  • any suitably suitable adjustment can be used, but particularly preferably a setting by means of one or more adjusting screws, in particular with a fine thread, can be provided.
  • Each support bar can be guided in a longitudinally displaceable manner on the guide block assigned to it in any suitable manner. Particularly preferred, however, each support bar is mounted by means of a recirculating ball guide or by means of a dovetail guide to the respective associated guide block.
  • a further preferred embodiment of the invention also consists in that the support jaw used in each case during a bending direction is moved together with the workpiece until it reaches its extended end position during the bending process.
  • the support jaw assembly according to the invention is formed so that all its parts are mounted on a common base plate or a common base support to form a unit for installation in a bending machine, whereby a subsequent equipment of a bending machine with a support jaw assembly according to the invention can be made quickly.
  • the invention also includes a bending machine for bending left and right of rod and tubular workpieces by means of a laterally displaceable to the longitudinal axis of the workpiece bending head, which is provided with a support jaw assembly according to the invention with one of the abovementioned embodiments.
  • Fig. 1 shows an oblique perspective view of a bending machine 1 for bending a rod and tubular workpiece 2 withdrawn endlessly from the coil.
  • the bending machine 1 has a machine frame 3, which is provided on its upper side with a straightening unit 4 and with a rotatable feeder 5.
  • the workpiece 2 drawn endlessly from the coil is removed from the rear side of the bending machine 1 (in FIG Fig. 1 : From the right) initially supplied to the straightening unit 4, passes through this in the rotatable feeder 5, from which it exits the front and then fed to the front side of the bending machine 1 a bending head 6 with a rotatable bending disc 7 for carrying out the desired bends.
  • the bending disk 7 represents a bending template which can be rotated in both directions of rotation about a rotation axis 8 lying in a vertical direction and perpendicular to the longitudinal axis of the workpiece 2.
  • this is provided with a shaping groove 9, in which the workpiece 2 tangentially enters upon reaching the bending disc 7 and remains during the bending operation.
  • a bending finger 10 is further attached, which cooperates with the bending disc 7 for performing the bending operation and with this about the rotation axis 8 together (or independently) is pivotable.
  • the workpiece 2 is arranged, which is bent upon rotation of the bending finger 10 and bending disc 7 around the circumference of the latter according to the circular shape formed by this.
  • the bending head 6 can be moved, as shown by the arrows A and B, both in the vertical and in the transverse direction (that is, perpendicularly to the longitudinal axis of the workpiece 2).
  • the bending head 6 is preferably of a construction as shown in the EP 1 591 174 B1 , z. B. Fig. 13, shown in detail.
  • Fig. 2 shows, the workpiece 2 passes before reaching the bending head 6 through a support jaw assembly therethrough.
  • This consists of two support jaws 11, 12, which are arranged on both sides of the workpiece 2 and each of which is mounted on a bracket 13 and 14, which in turn is mounted on a support bar 15 and 16 via screws 17.
  • the screws 17 extend through slots in a respective laterally projecting support flange of the holder 13 and 14, whereby the possibility exists, the respective holder 13 and 14 in their attachment to the corresponding support bar 15 and 16 relative to this and in one direction Spend perpendicular to the longitudinal axis of the workpiece 2 in a desired position and to fix in this.
  • each support jaws 11, 12 is mounted on its associated bracket 13 and 14 by means of screws 18, wherein a device not shown in the figures is provided, by means of which each support jaws 11, 12 in turn also in the direction perpendicular to the workpiece 2 back in Its location can be fine tuned.
  • the screws 18 each z. B. also in slightly elongated mounting holes of the associated support flange to allow a fine adjustment of the respective support jaw 11, 12 relative to the workpiece 2.
  • a device for adjusting the height of the support jaws 11, 12 is provided, which in the Fig. 1 and 2 but not shown.
  • Each support bar 15, 16 is seated on an associated guide block 19 or 20 and is slidably mounted on this in each case via a guide rail 21 in the longitudinal direction of the workpiece 2, wherein the guide rail 21 is mounted on the underside of the support bar 15 and 16 and in a corresponding Dovetail groove in the associated guide block 19 and 20 engages, so that a total of one dovetail guide is present.
  • Each support bar 15, 16 is connected at its side facing away from the bending head 6 via a push rod 22 with a drive device in the form of a pneumatic adjusting cylinder 23, 24 which in turn about a pivot axis perpendicular to the longitudinal axis of the workpiece 2 and transverse to a retaining flange 25 and 26 is articulated.
  • the pneumatic cylinders 23, 24 are, not shown in the figures, connected in a suitable manner to a central control device, by means of which they z. B. can be controlled by a program control.
  • the guide blocks 19 and 20 are, like the support flanges 25, 26 for the pneumatic cylinder 23, 24 mounted on a base plate 27, whereby the whole support jaw assembly together with its drive with this base plate 27 forms a self-contained unit, in a suitable manner on the frame. 3 the bending machine 1 can be attached, such as from the Fig. 1 and 2 removable.
  • the support bars 15 and 16, their respective push rod 22 and the associated pneumatic cylinder 23, 24 each extend in a direction parallel to the longitudinal direction of the workpiece 2 alignment, wherein by the pneumatic cylinder 23 and 24, the support bars 15 and 16 with the respective holders attached to them 13 and 14 and the respective support jaws 11, 12 in a direction parallel to the longitudinal axis of the workpiece 2 from a retracted starting position, as shown in FIGS Fig.
  • each support jaws 11, 12 Removable while each support jaws 11, 12 is removed from the bending disc 7, be transferred to an extended end position, in which the extended support jaws 11 and 12 with its bending head 6 facing front to the point of the tangential inlet of the workpiece 2 in the Formnut 9 of the bending disc 7 is advanced and thereby lies directly next to the bending finger 10 of the bending head 6.
  • the workpiece 2 engaging between the two in the forming groove 9 of the bending disk 7 is provided with the desired bend around the bending disk 7, the workpiece 2 being continuously fed in a region between the position its tangential inlet into the forming groove 9 and, seen in the transport direction of the workpiece 2, lying in front of this inlet point (according to the length of the respective support jaw 11 and 12 in the longitudinal direction of the workpiece 2 seen) from the support jaws 11 and 12 in the attached there Formnut 28 is supported.
  • This support prevents just in the area immediately before the inlet of the workpiece 2 in the forming groove 9, the occurrence of cracks, faults o. ⁇ . On the workpiece 2, which would otherwise occur due to the bending forces occurring during the bending process.
  • the arrangements each consisting of a support jaws 11 and 12, the associated bracket 13 and 14, the respective support bar 15 and 16, the associated guide block 19 and 20, the respective push rod 22 and the connected pneumatic cylinder 23 and 24 respectively , are mounted on the frame 3 of the bending machine 1, that each of them is located on one side of the workpiece 2, both arrangements, as seen relative to the workpiece 2, are mounted in their retracted initial position symmetrical to each other.
  • Fig. 3 now shows a top view of the in Fig. 2 shown portion of the bending machine 1, wherein from this illustration, the arrangement of the support jaws 11 and 12 with the supporting elements 13 and 14, 15 and 16, and the respective push rods 22 and the respectively associated pneumatic cylinder 23 and 24 on both sides of the workpiece. 2 is apparent.
  • the presentation of the Fig. 3 shows the case of a right bend, which in the position in Fig. 3 has not yet begun, which is why the workpiece 2 still protrudes beyond the bending head 6 and is bent only by a subsequent movement of the bending finger 10 and the bending disc 7.
  • the support jaws 12 has been spent on the pneumatic cylinder 24 in its extended end position, in which he how Fig. 3 shows, is arranged directly beside the bending finger 10 and spent with its front end portion up to the point of the tangential inlet of the workpiece 2 in the guide groove 9 of the bending disc 7. From here, the support jaw 12 supports the workpiece 2 on its opposite side of the bending disc 7 over a longitudinal section away, which lies in front of the tangential inlet point and the length of the support jaw 12 (seen in the longitudinal direction of the workpiece 2).
  • Fig. 3 shows, the other holding jaws 11 is spent on the him driving the pneumatic cylinder 23 in its retracted position, in which he also abuts on the other side against the workpiece 2, but the same from the bending head 6 and the bending disc 7 is removed.
  • Fig. 4 now shows the same section of the bending machine 1, as in Fig. 3 is shown, but here in the case of left turn.
  • Fig. 4 how out Fig. 4 compared to Fig. 3 can be taken is in Fig. 4 the bending head 6 with the bracket supporting him side of the workpiece 2 so that the workpiece 2 now on the compared to Fig. 3 opposite side of the bending disc 7 is located. If a change from right to left bending or vice versa during the treatment of the workpiece 2 are made, to this change in position of the bending head 6, however, not only its lateral process in the direction of travel B (see. Fig. 1 and Fig. 2 ), but also a lowering of the bending head 6 in the direction A (see. Fig. 1 and Fig. 2 ) to perform under the workpiece 2, the lateral movement in the direction B and then brought back up to the desired height position.
  • the support jaws 11 and 12 can perform different functions in the order shown:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

The arrangement has a support jaw (11) that is provided on a side of longitudinal axis of a workpiece (2) to be processed. The support jaw defines a groove facing the workpiece. The former support jaw arranged in a position of extension provides lateral support to the workpiece being bent in specific direction while another support jaw (12) remains in a position of retraction. The latter support jaw arranged in the position of extension provides lateral support to the workpiece being bent in another specific direction while the former support jaw remains in the position of retraction. Independent claims are also included for the following: (1) a bending machine for left and right bending of rod shaped and tubular workpieces (2) a method for bending a tubular workpiece.

Description

Die Erfindung bezieht sich auf eine Stützbackenanordnung zum gleitenden seitlichen Abstützen von stab- und rohrförmigen Werkstücken vor deren Einlauf in die Formnut einer Biegescheibe eines Biegekopfes einer Biegemaschine, mit zwei Stützbacken, die beidseits der Längsachse des zu bearbeitenden Werkstücks angeordnet und jeweils mit einer dem Werkstück zugewandten Formnut zur seitlichen Anlage an diesem versehen sind, wobei jeder Stützbacken längsverschieblich an einem Führungsblock geführt und von einer zugeordneten Antriebseinrichtung aus einer entgegen der Transportrichtung des Werkstücks ausgefahrenen Endlage verbringbar ist, in welcher der Stützbacken das Werkstück in einen Bereich von dessen tangentialem Einlauf in die Formnut der Biegescheibe bis zu einer Stelle in einem vorgegebenen Abstand von dieser seitlich gleitend abstützt.The invention relates to a support jaw assembly for sliding lateral support of rod and tubular workpieces before their entry into the forming groove of a bending disc of a bending head of a bending machine, with two support jaws arranged on both sides of the longitudinal axis of the workpiece to be machined and each facing with a workpiece Forming groove are provided for lateral abutment on this, each support jaw guided longitudinally displaceable on a guide block and can be moved by an associated drive means from an opposite to the transport direction of the workpiece extended end position, in which the support jaws the workpiece in a region of its tangential inlet into the forming groove the bending disc is supported to slide laterally to a point at a predetermined distance from this.

Bei Biegemaschinen zum Biegen von stab- oder rohrförmigen Werkstücken mittels eines Biegekopfes besteht die Gefahr, daß das kontinuierlich zugeführte, zu bearbeitende Werkstück beim Biegevorgang, bei dem es mittels einer Biegescheibe, die eine Formnut aufweist, in der das Werkstück liegt, und eines zugeordneten Biegefingers kreis- oder kreisabschnittförmig gebogen wird, in einem gewissen Bereich vor seinem Einlauf in die Formnut der Biegeschablone durch die beim Biegen auftretenden Kräfte höchst unerwünschte Verwerfungen (Knicke, Ausbeulungen u. a.) erfährt.In bending machines for bending rod or tubular workpieces by means of a bending head there is a risk that the continuously fed, to be machined workpiece in the bending process in which it by means of a bending disc having a forming groove in which the workpiece is located, and an associated bending finger bent circular or circular section, in a certain range before its entry into the forming groove of the bending template by the forces occurring during bending highly undesirable faults (kinks, bulges, etc.) learns.

Um dies zu verhindern, werden bei bekannten Biegemaschinen in dem genannten Bereich Stützbacken auf der Seite des zu behandelnden Werkstücks gegen dieses angelegt, die dem Biegekopf und der Biegescheibe abgewandt ist.In order to prevent this, in known bending machines, support jaws on the side of the workpiece to be treated are placed against the latter in the named area, which jaws facing away from the bending head and the bending disk.

Eine solche Anordnung zeigt die DE 201 18 444 U1 , wobei dort ein Stützbacken vorgesehen ist, der entlang dem rohrförmigen Körper und senkrecht zu diesem verfahren werden kann. Diese bekannte Stützbackenanordnung kann aber nur im Falle einer einseitigen Biegung des rohrförmigen Werkstückes eingesetzt werden, da sie nur auf einer Seite eine Abstützung gegen die Biegekräfte gestattet.Such an arrangement shows the DE 201 18 444 U1 , where there is provided a support jaw, which can be moved along the tubular body and perpendicular to this. However, this known jaw assembly can only in the case of a one-sided bending of the tubular workpiece can be used, since it allows only on one side support against the bending forces.

Bei der Stützbackenanordnung aus der US 4 959 984 wird ein seitlicher Stützbacken eingesetzt, welcher senkrecht zur Längsachse des zu behandelnden Werkstücks aus einer Eingriffsposition in eine abgezogene Nicht-Eingriffsposition verfahren werden kann. Auch bei dieser bekannten Anordnung ist nur eine einseitige Biegung des Werkstücks möglich.In the support jaw assembly of the US 4,959,984 a lateral support jaw is used, which can be moved perpendicular to the longitudinal axis of the workpiece to be treated from an engaged position to a withdrawn non-engaged position. Also in this known arrangement, only a one-sided bending of the workpiece is possible.

Im Prinzip eine gleiche Anordnung zeigen auch die DE 60100147 T2 sowie die EP 0 934 783 B1 und die DE 3922326 C2 .In principle, the same arrangement also show the DE 60100147 T2 as well as the EP 0 934 783 B1 and the DE 3922326 C2 ,

Eine Vorrichtung, mittels derer das zu bearbeitende Werkstück rechts und links gebogen werden kann, ist aus der WO 2004/000479 A1 bekannt. Auch hier wird im Bereich vor dem tangentialen Einlauf des stab- oder rohrförmigen Werkstücks in die Formnut der Biegescheibe ein Stützbacken angelegt, wobei hier zwei solche Stützbacken, jeder für eine Biegerichtung, vorgesehen sind, deren jeder eine Formnut zur Anlage gegen eine Seite des Werkstücks aufweist. Die Formnuten an beiden Stützbacken, wie auch die an der Biegescheibe, sind jedoch in unterschiedlicher axialer Höhe angeordnet. Zur Umstellung von Rechts- auf Linksbiegen sind bei dieser bekannten Vorrichtung jedoch komplizierter Dreh- und Schwenkbewegungen sowie Verschiebbewegungen längs eines Aufspanntisches erforderlich, um bei feststehendem Biegekopf das Werkzeug auf die jeweils gegenüberliegende Seite des Biegekopfes in die andere Formnut desselben zu verbringen und dabei auch die Stützbacken sowie die Klemmeinrichtungen, mittels derer das Werkstück beim Biegen um die Biegeschablone geführt wird, auf der anderen Seite des Biegekopfes zu plazieren. Der konstruktive Aufwand ist erheblich und die Anordnung ist sehr kompliziert. Infolge der großen Bauform wird zudem der verfügbare Biegefreiraum seitlich ganz erheblich eingeschränkt.A device by means of which the workpiece to be machined can be bent right and left, is from the WO 2004/000479 A1 known. Again, in the area in front of the tangential inlet of the rod or tubular workpiece in the forming groove of the bending disc a support jaws applied, in which case two such support jaws, each for a bending direction, are provided, each having a forming groove for abutment against a side of the workpiece , However, the forming grooves on both support jaws, as well as on the bending disc, are arranged at different axial height. To convert from right to left bending but complicated turning and pivoting movements along a clamping table are required in this known device to spend at a fixed bending head the tool on the opposite side of the bending head in the other form of the same groove and thereby also the support jaws and the clamping means by which the workpiece is guided on bending around the bending template to place on the other side of the bending head. The design effort is significant and the arrangement is very complicated. As a result of the large design, the available bending space is also considerably limited laterally.

Schließlich ist aus der EP 0 649 687 B1 eine Rohrbiegemaschine der eingangs genannten Art bekannt, mit der ein Rechts- wie ein Linksbiegen möglich ist. Auch hier werden zwei Stützbacken eingesetzt, die auf einander gegenüberliegenden Seiten des Biegekopfes angebracht und jeweils in Richtung auf das zu bearbeitende Werkstück hin zur Anlage gegen dieses verfahrbar sind. Während des Biegevorgangs folgt der jeweils im Einsatz befindliche Stützbacken dem kontinuierlich angeförderten rohrförmigen Werkstück nach. Der Biegekopf ist dabei mit einem seitlich vorstehenden Schwenkarm versehen, auf dem zwei weitere, einzeln auf den Biegekopf hin verfahrbare Spannbacken zum Verspannen des Rohres gegenüber einem am Biegekopf angebrachten Klemmelement angebracht sind, die nach dem Verspannen durch Verschwenken des Schwenkarmes um die Verschwenkachse des Biegekopfes den Biegevorgang bewirken. Wird eine Umstellung von einer Biegerichtung auf die andere gewünscht, muß dafür der Schwenkarm in eine um 180° verdrehte Schwenkposition gebracht werden, damit er auf der gegenüberliegenden Seite des Biegekopfes mit dem dort vorliegenden anderen Stützbacken zusammenarbeiten kann. Auch diese bekannte Biegemaschine ist relativ kompliziert im Aufbau, wobei die Stützbacken dort sowohl in Längsrichtung des zu bearbeitenden Werkstücks, als auch senkrecht zu dessen Längsachse bewegt werden müssen. Zudem liegen wiederum die Formnuten in den beiden Formbacken und die jeweils zugeordneten Formnuten an der Biegescheibe auf unterschiedlichen Höhen, was beim Umstellen der Biegerichtung auch noch eine Veränderung der Höhenlage der Gesamtanordnung relativ zu der des zugeführten strangförmigen Werkstücks bedingt.Finally, out of the EP 0 649 687 B1 a pipe bending machine of the type mentioned above, with a right as a left bending is possible. Again, two support jaws are used, which are mounted on opposite sides of the bending head and in each case in the direction of the workpiece to be machined out to rest against this movable. During the bending process, the support jaws which are in each case in use follow the continuously conveyed tubular workpiece. The bending head is provided with a laterally projecting pivot arm on which two more, individually movable on the bending head clamping jaws for clamping the tube relative to a mounted on the bending head clamping element are mounted after the clamping by pivoting the pivot arm to the pivot axis of the bending head Bending process cause. Is a change from one bending direction to the other desired, the swivel arm must be brought into a swivel position rotated by 180 ° so that it can work together on the opposite side of the bending head with the other support jaws present there. This known bending machine is relatively complicated in construction, where the support jaws there must be moved both in the longitudinal direction of the workpiece to be machined, as well as perpendicular to its longitudinal axis. In addition, in turn, the shape of grooves in the two mold jaws and the respective associated forming grooves on the bending disc at different heights, which also requires a change in the altitude of the overall arrangement relative to the supplied strand-like workpiece when switching the bending direction.

Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, eine Stützbackenanordnung vorzuschlagen, die sowohl für Rechts-, wie auch für Linksbiegen eingesetzt werden kann, wobei eine einfache Umstellung und ein insgesamt unkomplizierter Aufbau gegeben ist.Proceeding from this, the present invention seeks to propose a support jaw assembly that can be used for both right as well as left-hand bending, with a simple conversion and an overall uncomplicated structure is given.

Erfindungsgemäß wird dies bei einer Stützbackenanordnung der eingangs genannten Art dadurch erreicht, daß die beiden Stützbacken stets seitlich gegen das Werkstück gleitend anliegen, wobei jeder Stützbacken auf einer Halterung an einer an dem Führungsblock längsverschieblich geführten Tragleiste befestigt ist, die von der zugeordneten Antriebseinrichtung verschiebbar ist, wobei die beiden Tragleisten derart von der Antriebseinrichtung angetrieben sind, daß wenn einer der Stützbacken sich in seiner ausgefahrenen Endlage befindet, der andere Stützbacken seine eingefahrene Ausgangslage einnimmt.According to the invention this is achieved in a support jaw assembly of the type mentioned in that the two support jaws are always slidably against the side of the workpiece, each support jaw is mounted on a holder on a longitudinally displaceable guided on the guide block support bar, which is displaceable by the associated drive means, wherein the two support strips are driven by the drive means such that when one of the support jaws is in its extended end position, the other support jaws assumes its retracted starting position.

Die erfindungsgemäße Stützbackenanordnung weist zunächst einen vergleichsweise einfachen konstruktiven Aufbau auf, bei dem zum Wechseln der Biegerichtung im wesentlichen nur die Erzeugung eines seitlichen Versatzes des Biegekopfes relativ zur Längsachse des zu bearbeitenden Werkstücks, etwa durch ein Verfahren des Biegekopfes, vorzunehmen ist. Die Anordnung mehrerer Formnuten an der Biegescheibe, axial zueinander versetzt, ist ebenso wenig erforderlich wie eine seitliche Verfahrbarkeit der Stützbacken relativ zum Werkstück. Vielmehr reicht eine beim erstmaligen Zuliefern des Werkstücks vorzunehmende Einfädelung zwischen die beiden Stützbacken, die jeweils seitlich gegen das Werkstück anliegen, ohne dieses zwischen sich festzuklemmen, völlig aus, da die Funktion jedes Stützbackens nicht die eines Klemmbackens ist, sondern allein ein seitliches Abstützen gegen die beim Biegevorgang ausgelösten Reaktionskräfte am Werkstück bewirkt. Da beide Stützbacken stets seitlich gegen das Werkstück anliegen, unabhängig davon, ob sie sich in ihrer jeweils eingefahrenen oder ausgefahrenen Endposition befinden, bedarf es bei der Umstellung der Biegerichtung neben dem seitlichen Versatz des Biegekopfes nur noch des Ausfahrens des benötigten Stützbackens bis zur tangentialen Einlaufstelle des Werkstücks in die Formnut der Biegescheibe und das gleichzeitige Zurückziehen des anderen, nicht benötigten Stützbackens in seine eingefahrene, d. h. vom Biegekopf entfernte, Ausgangsstellung. Hierdurch läßt sich einfach und rasch sowie mit wenigen Verstellbewegungen eine Umstellung der Biegerichtung bei dennoch einfachem Aufbau der Gesamtanordnung erreichen.The support jaw assembly according to the invention initially has a comparatively simple structural design, in which for changing the bending direction essentially only the generation of a lateral offset of the bending head relative to the longitudinal axis of the workpiece to be machined, for example by a method of bending head to make. The arrangement of a plurality of mold grooves on the bending disc, axially offset from one another, is just as unnecessary as a lateral movability of the support jaws relative to the workpiece. Rather, sufficient for a first-time deliveries of the workpiece threading between the two support jaws, each rest against the side of the workpiece without this clamp between them, completely, since the function of each jaw is not a jaw, but only a lateral support against the causes reaction forces on the workpiece triggered during the bending process. Since both support jaws always rest against the side of the workpiece, regardless of whether they are in their respective retracted or extended end position, it only requires the extension of the required support jaw to the tangential inlet point of the bending direction next to the lateral offset of the bending head Workpiece in the forming groove of the bending disc and the simultaneous retraction of the other, not required support jaw in its retracted, ie remote from the bending head, starting position. This makes it easy and quick as well achieve a conversion of the bending direction with still a simple adjustment of the overall arrangement with a few adjustment movements.

Bei der Erfindung können beide Tragleisten an eine gemeinsame Antriebseinrichtung angeschlossen sein, mittels derer sie einzeln oder zusammen gegenläufig verfahren werden können, was Ober einen geeigneten Hebelmechanismus, gegenläufige Spindelantriebe o.ä. realisiert werden kann. Besonders bevorzugt wird jedoch jede Tragleiste an eine eigene Antriebseinrichtung, bevorzugt an einen Pneumatikzylinder oder an einen Servoantrieb, angeschlossen.In the invention, both support bars can be connected to a common drive means by which they can be moved individually or together in opposite directions, what Ober a suitable lever mechanism, counter-rotating spindle drives o.ä. can be realized. However, each support bar is particularly preferably connected to its own drive device, preferably to a pneumatic cylinder or to a servo drive.

Vorteilhafterweise ist (sind) ferner die Antriebseinrichtung(en) an eine zentrale Steuerung angeschlossen, von der die Verstellbewegungen beim Wechsel der Biegerichtungen gesteuert werden.Advantageously, the drive device (s) are (are) further connected to a central control, by which the adjustment movements are controlled when changing the bending directions.

Bei der erfindungsgemäßen Stützbackenanordnung können die Stützbacken entweder so eingesetzt werden, daß der jeweils zum Abstützen verwendete Stützbacken bei seinem Einsatz aus der Ausgangsposition gleich in seine ausgefahrene Endstellung überführt und während des Biegevorgangs in dieser unbeweglich gehalten wird. Gleichermaßen kann aber auch vorgesehen werden, was im Rahmen einer Programmsteuerung der Antriebseinrichtung(en) unschwer realisierbar ist, daß der jeweils eingesetzte Stützbacken in Kontakt mit dem Werkstück während des Biegevorgangs mit diesem mitbewegt wird, bis er seine ausgefahrene Endposition erreicht hat oder sogar noch über diese ein Stück hinaus weitergeführt wird.In the support jaw assembly according to the invention, the support jaws can either be used so that the supporting jaws used for supporting in its use from the starting position transferred immediately into its extended end position and is held immobile during the bending process in this. Equally, however, it is also possible to provide what is easily realizable within the scope of a program control of the drive device (s) that the respectively used support jaw is moved in contact with the workpiece during the bending process until it has reached its extended end position or even over this one piece is continued.

In besonders vorteilhafter Ausgestaltung der Erfindung ist jeder Stützbacken aus einem Hartkunststoff, insbesondere aus Polyamid, gefertigt, wodurch sich bei einer Relativbewegung zwischen dem Werkstück und dem Stützbacken besonders geringe Reibkräfte erreichen lassen.In a particularly advantageous embodiment of the invention, each support jaws made of a hard plastic, in particular made of polyamide, which can be achieved in a relative movement between the workpiece and the support jaws particularly low frictional forces.

Die erfindungsgemäße Stützbackenanordnung kann bevorzugt so angeordnet werden, daß die Stützbacken, ihre Halterungen, die Tragleisten, die Führungsblöcke und die Antriebseinrichtungen symmetrisch zur Werkstück-Längsachse vorgesehen sind, wobei sich insgesamt auch eine Art zweigeteilte und axial verfahrbare Werkstückführung erreichen läßt.The support jaw assembly according to the invention can preferably be arranged so that the support jaws, their brackets, the support strips, the guide blocks and the drive means are provided symmetrically to the workpiece longitudinal axis, which can be achieved in total a type of two-part and axially movable workpiece guide.

Die erfindungsgemäße Vorrichtung eignet sich für die Bearbeitung stabförmiger oder rohrförmiger Werkstücke, insbesondere für rohrförmige Werkstücke vom Coil. Sie verhindert im übrigen zuverlässig ein unerwünschtes und unsauberes Biegen, Knicken, Ausbeulen o. ä. des zu behandelnden Werkstückes, so daß nur die tatsächlich gewünschte Verformung des Werkstücks am Biegekopf zugelassen wird.The device according to the invention is suitable for the machining of rod-shaped or tubular workpieces, in particular for tubular workpieces from the coil. Moreover, it reliably prevents unwanted and unclean bending, buckling, bulging or the like of the workpiece to be treated, so that only the actually desired deformation of the workpiece at the bending head is permitted.

Besonders bevorzugt wird bei der erfindungsgemäßen Stützbackenanordnung die jeweils einen Stützbacken tragende Halterung auf der zugeordneten Tragleiste lösbar befestigt und ist bevorzugt in Richtung auf das zu bearbeitende Werkstück hin lageverstellbar. Gleichermaßen vorzugsweise wird bei der Erfindung auch jeder Stützbacken auf der ihn tragenden Halterung auswechselbar befestigt, und ist insbesondere auch vorteilhafterweise in Richtung auf das zu bearbeitende Werkstück hin sowie in seiner Höhenlage lageverstellbar angeordnet. Dabei ist bevorzugt jeder Halterung eine Verstelleinrichtung für den Stützbacken zugeordnet, mittels der dieser relativ zur Halterung in Richtung senkrecht zur Längsachse der Tragleiste hin und in seiner Höhenlage feineinstellbar ist. Hierfür kann jede entsprechend geeignete Verstelleinrichtung eingesetzt werden, wobei besonders bevorzugt jedoch eine Einstellung mittels einer oder mehrerer Verstellschrauben, insbesondere mit einem Feingewinde, vorgesehen werden kann.Particularly preferably, in the support jaw arrangement according to the invention, the holder carrying a support jaw in each case is detachably fastened to the associated support strip and is preferably position-adjustable in the direction of the workpiece to be machined. Equally preferably, in the invention, each support jaw is interchangeably mounted on the support carrying it, and is in particular also advantageously arranged in a positionally adjustable manner in the direction of the workpiece to be machined and in its vertical position. In this case, each holder is preferably associated with an adjusting device for the support jaws, by means of which this is fine adjustable relative to the holder in the direction perpendicular to the longitudinal axis of the support bar and in its altitude. For this purpose, any suitably suitable adjustment can be used, but particularly preferably a setting by means of one or more adjusting screws, in particular with a fine thread, can be provided.

Gleichermaßen vorteilhaft ist es aber auch, wenn statt dessen eine schwimmende Lagerung jedes Stützbackens auf seiner Halterung vorgesehen wird, mittels derer ein eventueller Höhenversatz automatisch ausgeglichen werden kann.Equally advantageous, it is also when instead a floating mounting of each support jaw is provided on its support, by means of which a possible height offset can be compensated automatically.

Jede Tragleiste kann an dem ihr zugeordneten Führungsblock in jeder geeigneten Weise längsverschieblich geführt sein. Besonders bevorzugt wird jedoch jede Tragleiste mittels einer Kugelumlaufführung oder mittels einer Schwalbenschwanzführung an dem jeweils zugeordneten Führungsblock gelagert.Each support bar can be guided in a longitudinally displaceable manner on the guide block assigned to it in any suitable manner. Particularly preferred, however, each support bar is mounted by means of a recirculating ball guide or by means of a dovetail guide to the respective associated guide block.

Eine weitere bevorzugte Ausgestaltung der Erfindung besteht auch darin, daß der jeweils bei einer Biegerichtung eingesetzte Stützbacken während des Biegevorgangs zusammen mit dem Werkstück bis zum Erreichen seiner ausgefahrenen Endlage bewegt wird.A further preferred embodiment of the invention also consists in that the support jaw used in each case during a bending direction is moved together with the workpiece until it reaches its extended end position during the bending process.

Vorzugsweise wird die erfindungsgemäße Stützbackenanordnung so ausgebildet, daß alle ihre Teile auf einer gemeinsamen Grundplatte oder einem gemeinsamen Grundträger zur Ausbildung einer Baueinheit zum Einbau bei einer Biegemaschine angebracht sind, wodurch auch eine nachträgliche Ausrüstung einer Biegemaschine mit einer erfindungsgemäßen Stützbackenanordnung rasch vorgenommen werden kann.Preferably, the support jaw assembly according to the invention is formed so that all its parts are mounted on a common base plate or a common base support to form a unit for installation in a bending machine, whereby a subsequent equipment of a bending machine with a support jaw assembly according to the invention can be made quickly.

Die Erfindung umfaßt auch eine Biegemaschine zum Links- und Rechtsbiegen von stab- und rohrförmigen Werkstücken mittels eines seitlich zur Längsachse des Werkstückes versetzbaren Biegekopfes, die mit einer erfindungsgemäßen Stützbackenanordnung mit einer der oben genannten Ausgestaltungen versehen ist.The invention also includes a bending machine for bending left and right of rod and tubular workpieces by means of a laterally displaceable to the longitudinal axis of the workpiece bending head, which is provided with a support jaw assembly according to the invention with one of the abovementioned embodiments.

Die Erfindung wird nachfolgend anhand der Zeichnung im Prinzip beispielshalber noch näher erläutert. Es zeigen:

  • Fig. 1 eine perspektivische Ansicht einer Rohrbiegemaschine mit einer erfindungsgemäßen Stützbackenanordnung;
  • Fig. 2 einen vergrößerten perspektivischen Teilabschnitt des Bereiches der Rohrbiegemaschine aus Fig. 1 mit dem Biegekopf und der erfindungsgemäßen Stützbackenanordnung;
  • Fig. 3 eine Draufsicht auf die Darstellung der Fig. 3, sowie
  • Fig. 4 eine Draufsicht auf den Abschnitt der Biegemaschine aus Fig. 2, jedoch in der Einstellung zum Linksbiegen des Werkstücks.
The invention will be explained in more detail by way of example with reference to the drawing in principle. Show it:
  • Fig. 1 a perspective view of a pipe bending machine with a support jaw assembly according to the invention;
  • Fig. 2 an enlarged perspective section of the area of the pipe bending machine Fig. 1 with the bending head and the support jaw assembly according to the invention;
  • Fig. 3 a plan view of the representation of Fig. 3 , such as
  • Fig. 4 a plan view of the section of the bending machine Fig. 2 , but in the setting for left-hand bending of the workpiece.

Fig. 1 zeigt eine perspektivische Schrägansicht auf eine Biegemaschine 1 zum Biegen eines endlos vom Coil abgezogenen stab- und rohrförmigen Werkstücks 2. Fig. 1 shows an oblique perspective view of a bending machine 1 for bending a rod and tubular workpiece 2 withdrawn endlessly from the coil.

Die Biegemaschine 1 weist ein Maschinengestell 3 auf, das an seiner Oberseite mit einer Richteinheit 4 und mit einem drehbaren Einzug 5 versehen ist.The bending machine 1 has a machine frame 3, which is provided on its upper side with a straightening unit 4 and with a rotatable feeder 5.

Das vom Coil endlos abgezogene Werkstück 2 wird von der Rückseite der Biegemaschine 1 (in Fig. 1: von rechts her) zunächst der Richteinheit 4 zugeführt, läuft durch diese hindurch in den drehbaren Einzug 5, aus dem es vorne austritt und dann an der Stirnseite der Biegemaschine 1 einem Biegekopf 6 mit einer drehbaren Biegescheibe 7 zur Durchführung der gewünschten Biegungen zugeführt wird.The workpiece 2 drawn endlessly from the coil is removed from the rear side of the bending machine 1 (in FIG Fig. 1 : From the right) initially supplied to the straightening unit 4, passes through this in the rotatable feeder 5, from which it exits the front and then fed to the front side of the bending machine 1 a bending head 6 with a rotatable bending disc 7 for carrying out the desired bends.

Die Biegescheibe 7 stellt eine Biegeschablone dar, die um eine in senkrechter Richtung und senkrecht zur Längsachse des Werkstücks 2 liegende Drehachse 8 in beiden Drehrichtungen vedrehbar ist.The bending disk 7 represents a bending template which can be rotated in both directions of rotation about a rotation axis 8 lying in a vertical direction and perpendicular to the longitudinal axis of the workpiece 2.

An der äußeren Umfangsfläche der Biegescheibe 7 ist diese mit einer Formnut 9 versehen, in die das Werkstück 2 bei Erreichen der Biegescheibe 7 tangential einläuft und während des Biegevorgangs verbleibt.On the outer peripheral surface of the bending disc 7, this is provided with a shaping groove 9, in which the workpiece 2 tangentially enters upon reaching the bending disc 7 and remains during the bending operation.

Am Biegekopf 6 ist ferner ein Biegefinger 10 angebracht, der mit der Biegescheibe 7 zum Durchführen des Biegevorgangs zusammenwirkt und mit dieser um die Drehachse 8 gemeinsam (oder auch unabhängig voneinander) verschwenkbar ist. Zwischen dem Biegefinger 10 und der Formnut 9 der Biegescheibe 7 ist das Werkstück 2 angeordnet, das bei Verdrehung von Biegefinger 10 und Biegescheibe 7 um den Umfang der letzteren herum entsprechend der von dieser gebildeten Kreisform verbogen wird.At the bending head 6, a bending finger 10 is further attached, which cooperates with the bending disc 7 for performing the bending operation and with this about the rotation axis 8 together (or independently) is pivotable. Between the bending finger 10 and the forming groove 9 of the bending disc 7, the workpiece 2 is arranged, which is bent upon rotation of the bending finger 10 and bending disc 7 around the circumference of the latter according to the circular shape formed by this.

Der Biegekopf 6 ist, wie durch die Pfeile A und B dargestellt, sowohl in senkrechter, wie auch in Quer-Richtung (d. h. senkrecht quer zur Längsachse des Werkstückes 2) verfahrbar.The bending head 6 can be moved, as shown by the arrows A and B, both in the vertical and in the transverse direction (that is, perpendicularly to the longitudinal axis of the workpiece 2).

Der Biegekopf 6 ist bevorzugt von einem Aufbau, wie er in der EP 1 591 174 B1 , z. B. Fig. 13, im einzelnen dargestellt ist.The bending head 6 is preferably of a construction as shown in the EP 1 591 174 B1 , z. B. Fig. 13, shown in detail.

Wie insbesondere Fig. 2 zeigt, läuft das Werkstück 2 vor Erreichen des Biegekopfes 6 durch eine Stützbackenanordnung hindurch. Diese besteht aus zwei Stützbacken 11, 12, die beidseits des Werkstückes 2 angeordnet sind und deren jeder auf einer Halterung 13 bzw. 14 angebracht ist, die ihrerseits jeweils auf einer Tragleiste 15 bzw. 16 über Schrauben 17 befestigt ist. Die Schrauben 17 verlaufen durch Langlöcher in einem jeweils seitlich vorstehenden Stützflansch der Halterung 13 bzw. 14, wodurch die Möglichkeit gegeben ist, die jeweilige Halterung 13 bzw. 14 bei ihrer Befestigung auf der entsprechenden Tragleiste 15 bzw. 16 relativ zu dieser und in einer Richtung senkrecht zur Längsachse des Werkstückes 2 in eine gewünschte Position zu verbringen und in dieser zu fixieren.In particular Fig. 2 shows, the workpiece 2 passes before reaching the bending head 6 through a support jaw assembly therethrough. This consists of two support jaws 11, 12, which are arranged on both sides of the workpiece 2 and each of which is mounted on a bracket 13 and 14, which in turn is mounted on a support bar 15 and 16 via screws 17. The screws 17 extend through slots in a respective laterally projecting support flange of the holder 13 and 14, whereby the possibility exists, the respective holder 13 and 14 in their attachment to the corresponding support bar 15 and 16 relative to this and in one direction Spend perpendicular to the longitudinal axis of the workpiece 2 in a desired position and to fix in this.

Auch jeder Stützbacken 11, 12 ist auf der ihm zugeordneten Halterung 13 bzw. 14 mittels Schrauben 18 befestigt, wobei eine in den Figuren nicht dargestellte Einrichtung vorgesehen ist, mittels derer jeder Stützbacken 11, 12 seinerseits ebenfalls in Richtung senkrecht auf das Werkstück 2 hin in seiner Lage feineingestellt werden kann. Zu diesem Zweck können die Schrauben 18 jeweils z. B. ebenfalls in etwas länglichen Aufnahmebohrungen des zugehörigen Stützflansches sitzen, um eine Feineinstellung des betreffenden Stützbackens 11, 12 relativ zum Werkstück 2 zuzulassen. Auch eine Einrichtung zur Höheneinstellung der Stützbacken 11, 12 ist vorgesehen, die in den Fig. 1 und 2 jedoch nicht dargestellt ist.Also, each support jaws 11, 12 is mounted on its associated bracket 13 and 14 by means of screws 18, wherein a device not shown in the figures is provided, by means of which each support jaws 11, 12 in turn also in the direction perpendicular to the workpiece 2 back in Its location can be fine tuned. For this purpose, the screws 18 each z. B. also in slightly elongated mounting holes of the associated support flange to allow a fine adjustment of the respective support jaw 11, 12 relative to the workpiece 2. Also, a device for adjusting the height of the support jaws 11, 12 is provided, which in the Fig. 1 and 2 but not shown.

Jede Tragleiste 15, 16 sitzt auf einem zugeordneten Führungsblock 19 bzw. 20 und ist an diesem jeweils über eine Führungsschiene 21 in Längsrichtung des Werkstückes 2 verschieblich gelagert, wobei die Führungsschiene 21 an der Unterseite der Tragleiste 15 bzw. 16 angebracht ist und in eine entsprechende Schwalbenschwanznut im zugeordneten Führungsblock 19 bzw. 20 eingreift, so daß insgesamt jeweils eine Schwalbenschwanzführung vorliegt.Each support bar 15, 16 is seated on an associated guide block 19 or 20 and is slidably mounted on this in each case via a guide rail 21 in the longitudinal direction of the workpiece 2, wherein the guide rail 21 is mounted on the underside of the support bar 15 and 16 and in a corresponding Dovetail groove in the associated guide block 19 and 20 engages, so that a total of one dovetail guide is present.

Jede Tragleiste 15, 16 ist an ihrer dem Biegekopf 6 abgewandten Seite über eine Schubstange 22 mit einer Antriebseinrichtung jeweils in Form eines pneumatischen Verstellzylinders 23, 24 verbunden, der seinerseits um eine zur Längsachse des Werkstückes 2 senkrecht und quer liegende Verschwenkachse an einem Halteflansch 25 bzw. 26 angelenkt ist.Each support bar 15, 16 is connected at its side facing away from the bending head 6 via a push rod 22 with a drive device in the form of a pneumatic adjusting cylinder 23, 24 which in turn about a pivot axis perpendicular to the longitudinal axis of the workpiece 2 and transverse to a retaining flange 25 and 26 is articulated.

Die Pneumatikzylinder 23, 24 sind, in den Figuren nicht gezeigt, in geeigneter Weise an eine zentrale Steuereinrichtung angeschlossen, mittels derer sie z. B. durch eine Programmsteuerung ansteuerbar sind.The pneumatic cylinders 23, 24 are, not shown in the figures, connected in a suitable manner to a central control device, by means of which they z. B. can be controlled by a program control.

Die Führungsblöcke 19 und 20 sind ebenso wie die Halteflansche 25, 26 für die Pneumatikzylinder 23, 24 auf einer Grundplatte 27 befestigt, wodurch die ganze Stützbackenanordnung samt ihrem Antrieb mit dieser Grundplatte 27 eine in sich geschlossene Baueinheit bildet, die in geeigneter Weise am Gestell 3 der Biegemaschine 1 befestigt werden kann, etwa wie aus den Fig. 1 und 2 entnehmbar.The guide blocks 19 and 20 are, like the support flanges 25, 26 for the pneumatic cylinder 23, 24 mounted on a base plate 27, whereby the whole support jaw assembly together with its drive with this base plate 27 forms a self-contained unit, in a suitable manner on the frame. 3 the bending machine 1 can be attached, such as from the Fig. 1 and 2 removable.

Die Tragleisten 15 und 16, ihre jeweilige Schubstange 22 und der zugeordnete Pneumatikzylinder 23, 24 verlaufen jeweils in einer zur Längsrichtung der Werkstückes 2 parallelen Ausrichtung, wobei durch die Pneumatikzylinder 23 bzw. 24 die Tragleisten 15 bzw. 16 mit den an ihnen jeweils befestigten Halterungen 13 bzw. 14 und dem jeweiligen Stützbacken 11, 12 in einer Richtung parallel zur Längsachse des Werkstückes 2 von einer eingefahrenen Ausgangsstellung, wie sie aus den Fig. 1 und 2 entnehmbar und dabei jeder Stützbacken 11, 12 von der Biegescheibe 7 entfernt ist, in eine ausgefahrene Endstellung überführt werden, in welcher der ausgefahrene Stützbacken 11 bzw. 12 mit seiner dem Biegekopf 6 zugewandten Vorderseite bis an die Stelle des tangentialen Einlaufs des Werkstückes 2 in die Formnut 9 der Biegescheibe 7 vorgeschoben ist und dabei unmittelbar neben dem Biegefinger 10 des Biegekopfes 6 liegt. Bei einer anschließend ausgelösten Verdrehung der Biegescheibe 7 mit dem Biegefinger 10 wird das zwischen beiden in die Formnut 9 der Biegescheibe 7 eingreifende Werkstück 2 um die Biegescheibe 7 herum mit der gewünschten Biegung versehen, wobei das dabei kontinuierlich zugeführte Werkstück 2 in einem Bereich zwischen der Stelle seines tangentialen Einlaufs in die Formnut 9 und einer, in Transportrichtung des Werkstückes 2 gesehen, vor dieser Einlaufstelle liegenden Stelle (entsprechend der Länge des betreffenden Stützbackens 11 bzw. 12 in Längsrichtung des Werkstückes 2 gesehen) vom Stützbacken 11 bzw. 12 in der dort angebrachten Formnut 28 abgestützt wird. Diese Abstützung verhindert gerade im Bereich unmittelbar vor dem Einlauf des Werkstücks 2 in die Formnut 9 das Auftreten von Rissen, Verwerfungen o. ä. am Werkstück 2, welche durch die beim Biegevorgang auftretenden Biegekräfte ansonsten auftreten würden.The support bars 15 and 16, their respective push rod 22 and the associated pneumatic cylinder 23, 24 each extend in a direction parallel to the longitudinal direction of the workpiece 2 alignment, wherein by the pneumatic cylinder 23 and 24, the support bars 15 and 16 with the respective holders attached to them 13 and 14 and the respective support jaws 11, 12 in a direction parallel to the longitudinal axis of the workpiece 2 from a retracted starting position, as shown in FIGS Fig. 1 and 2 Removable while each support jaws 11, 12 is removed from the bending disc 7, be transferred to an extended end position, in which the extended support jaws 11 and 12 with its bending head 6 facing front to the point of the tangential inlet of the workpiece 2 in the Formnut 9 of the bending disc 7 is advanced and thereby lies directly next to the bending finger 10 of the bending head 6. In a subsequently triggered rotation of the bending disk 7 with the bending finger 10, the workpiece 2 engaging between the two in the forming groove 9 of the bending disk 7 is provided with the desired bend around the bending disk 7, the workpiece 2 being continuously fed in a region between the position its tangential inlet into the forming groove 9 and, seen in the transport direction of the workpiece 2, lying in front of this inlet point (according to the length of the respective support jaw 11 and 12 in the longitudinal direction of the workpiece 2 seen) from the support jaws 11 and 12 in the attached there Formnut 28 is supported. This support prevents just in the area immediately before the inlet of the workpiece 2 in the forming groove 9, the occurrence of cracks, faults o. Ä. On the workpiece 2, which would otherwise occur due to the bending forces occurring during the bending process.

Die Anordnungen, die jeweils aus einem Stützbacken 11 bzw. 12, der zugeordneten Halterung 13 bzw. 14, der jeweiligen Tragleiste 15 bzw. 16, dem zugeordneten Führungsblock 19 bzw. 20, der jeweiligen Schubstange 22 und dem angeschlossenen Pneumatikzylinder 23 bzw. 24 bestehen, sind so auf dem Gestell 3 der Biegemaschine 1 angebracht, daß jede von ihnen auf einer Seite des Werkstückes 2 liegt, wobei beide Anordnungen, relativ zum Werkstück 2 gesehen, in ihrer eingezogenen Ausgangslage symmetrisch zueinander angebracht sind.The arrangements, each consisting of a support jaws 11 and 12, the associated bracket 13 and 14, the respective support bar 15 and 16, the associated guide block 19 and 20, the respective push rod 22 and the connected pneumatic cylinder 23 and 24 respectively , Are mounted on the frame 3 of the bending machine 1, that each of them is located on one side of the workpiece 2, both arrangements, as seen relative to the workpiece 2, are mounted in their retracted initial position symmetrical to each other.

Die Steuerung der Pneumatikzylinder 23 und 24 erfolgt stets so, daß immer nur der Zylinder 23 bzw. 24, der bei der vorgesehenen Biegerichtung die gewünschte Abstützung übernehmen muß, sich in seiner ausgefahrenen Endlage befindet, während der andere Pneumatikzylinder die eingefahrene Ausgangsposition der mit ihm gekoppelten Tragleiste 15 bzw. 16 eingestellt hat, wie dies für die beiden Biegerichtungen in den Fig. 3 (für Rechtsbiegen) und Fig. 4 (für Linksbiegen) dargestellt ist.The control of the pneumatic cylinder 23 and 24 always takes place so that only the cylinder 23 or 24, which must take the desired support in the intended bending direction, is in its extended end position, while the other pneumatic cylinder retracted the starting position of him coupled Support bar 15 or 16 has set, as is the case for the two Biegerungen in the Fig. 3 (for right bending) and Fig. 4 (for left bending) is shown.

Fig. 3 zeigt nun eine Draufsicht auf den in Fig. 2 gezeigten Abschnitt der Biegemaschine 1, wobei aus dieser Darstellung die Anordnung der Stützbacken 11 und 12 mit den sie tragenden Elementen 13 bzw. 14, 15 bzw. 16, sowie den jeweiligen Schubstangen 22 und dem jeweils zugeordneten Pneumatikzylinder 23 bzw. 24 beidseits des Werkstückes 2 ersichtlich ist. Fig. 3 now shows a top view of the in Fig. 2 shown portion of the bending machine 1, wherein from this illustration, the arrangement of the support jaws 11 and 12 with the supporting elements 13 and 14, 15 and 16, and the respective push rods 22 and the respectively associated pneumatic cylinder 23 and 24 on both sides of the workpiece. 2 is apparent.

Die Darstellung der Fig. 3 zeigt den Fall einer Rechtsbiegung, die bei der Stellung in Fig. 3 noch nicht begonnen hat, weshalb das Werkstück 2 noch über den Biegekopf 6 vorragt und erst durch eine nachfolgende Bewegung des Biegefingers 10 und der Biegescheibe 7 gebogen wird. Hier ist der Stützbacken 12 über den Pneumatikzylinder 24 in seine ausgefahrene Endposition verbracht worden, in der er, wie Fig. 3 zeigt, direkt seitlich neben dem Biegefinger 10 angeordnet und mit seinem vorderen Endbereich bis zu der Stelle des tangentialen Einlaufs des Werkstücks 2 in die Führungsnut 9 der Biegescheibe 7 verbracht ist. Von hier aus stützt der Stützbacken 12 das Werkstück 2 auf dessen der Biegescheibe 7 gegenüberliegenden Seite über einen Längenabschnitt hinweg ab, der vor der tangentialen Einlaufstelle liegt und der Länge des Stützbackens 12 (in Längsrichtung des Werkstückes 2 gesehen) entspricht.The presentation of the Fig. 3 shows the case of a right bend, which in the position in Fig. 3 has not yet begun, which is why the workpiece 2 still protrudes beyond the bending head 6 and is bent only by a subsequent movement of the bending finger 10 and the bending disc 7. Here, the support jaws 12 has been spent on the pneumatic cylinder 24 in its extended end position, in which he how Fig. 3 shows, is arranged directly beside the bending finger 10 and spent with its front end portion up to the point of the tangential inlet of the workpiece 2 in the guide groove 9 of the bending disc 7. From here, the support jaw 12 supports the workpiece 2 on its opposite side of the bending disc 7 over a longitudinal section away, which lies in front of the tangential inlet point and the length of the support jaw 12 (seen in the longitudinal direction of the workpiece 2).

Wie Fig. 3 zeigt, ist der andere Haltebacken 11 über den ihn ansteuernden Pneumatikzylinder 23 in seine zurückgezogene Position verbracht, in welcher er zwar ebenfalls auf der anderen Seite gegen das Werkstück 2 anliegt, vom Biegekopf 6 und der Biegescheibe 7 desselben jedoch entfernt ist.As Fig. 3 shows, the other holding jaws 11 is spent on the him driving the pneumatic cylinder 23 in its retracted position, in which he also abuts on the other side against the workpiece 2, but the same from the bending head 6 and the bending disc 7 is removed.

Fig. 4 zeigt nun denselben Abschnitt der Biegemaschine 1, wie er in Fig. 3 dargestellt ist, hier jedoch im Falle eines Linksbiegens. Fig. 4 now shows the same section of the bending machine 1, as in Fig. 3 is shown, but here in the case of left turn.

Wie aus Fig. 4 im Vergleich zu Fig. 3 entnommen werden kann, ist in Fig. 4 der Biegekopf 6 mit der ihn halternden Konsole seitlich zum Werkstück 2 so verfahren, daß das Werkstück 2 nunmehr auf der im Vergleich zu Fig. 3 gegenüberliegenden Seite der Biegescheibe 7 liegt. Soll eine Umstellung von Rechts- auf Linksbiegen bzw. umgekehrt während der Behandlung des Werkstückes 2 vorgenommen werden, ist zu dieser Positionsänderung des Biegekopfes 6 jedoch nicht nur sein seitliches Verfahren in Verfahrrichtung B (vgl. Fig. 1 und Fig. 2) erforderlich, sondern auch noch ein Absenken des Biegekopfes 6 in Richtung A (vgl. Fig. 1 und Fig. 2), um unter dem Werkstück 2 die seitliche Bewegung in Richtung B durchzuführen und anschließend wieder nach oben in die gewünschte Höhenposition gebracht zu werden.How out Fig. 4 compared to Fig. 3 can be taken is in Fig. 4 the bending head 6 with the bracket supporting him side of the workpiece 2 so that the workpiece 2 now on the compared to Fig. 3 opposite side of the bending disc 7 is located. If a change from right to left bending or vice versa during the treatment of the workpiece 2 are made, to this change in position of the bending head 6, however, not only its lateral process in the direction of travel B (see. Fig. 1 and Fig. 2 ), but also a lowering of the bending head 6 in the direction A (see. Fig. 1 and Fig. 2 ) to perform under the workpiece 2, the lateral movement in the direction B and then brought back up to the desired height position.

In diesem Fall ist nun der im Vergleich zu Fig. 3 andere Stützbacken 11 vom Pneumatikzylinder 23 in seine vorgeschobene Endstellung gebracht, während der Stützbacken 12 vom Pneumatikzylinder 24 in seine vom Biegekopf 6 bzw. der Biegescheibe 7 entfernte Ausgangsstellung verfahren ist.In this case, it is now compared to Fig. 3 other support jaws 11 brought from the pneumatic cylinder 23 in its advanced end position, while the support jaws 12 is moved from the pneumatic cylinder 24 in its remote from the bending head 6 and the bending disk 7 starting position.

Bei der Darstellung gemäß Fig. 4 ist der Biegevorgang schon weitgehend abschlossen, wobei hier der Biegefinger 10 mit der Biegescheibe 7 bereits in eine solche Winkelposition verdreht ist, daß das Werkstück 2 um 90° zu seiner Transportrichtung nach links umgebogen ist.In the presentation according to Fig. 4 the bending process is already largely completed, in which case the bending finger 10 is already rotated with the bending disc 7 in such an angular position that the workpiece 2 is bent by 90 ° to its transport direction to the left.

Die Anordnung der Stützbacken 11 und 12 mit den sie jeweils tragenden und bewegenden Elementen derart, daß sie parallel zueinander und zum zugeführten Werkstück 2 liegen und nur so weit voneinander entfernt sind, daß ihre Formnuten 28 stets beidseits des Werkstücks 2 gegen dieses anliegen, ergibt eine sehr schlanke und platzsparende Gesamtanordnung, die sich auch gut für einen nachträglichen Einbau in einer bereits vorhandenen Biegemaschine eignet. Dieser kompakte Aufbau läßt sich auch entsprechend preisgünstig herstellen, gewährleistet einen großen Biegefreiraum und erfordert zum Ändern der Biegerichtung nur die Ausführung kleiner Verschiebebewegungen an den Stützbacken 11 und 12 und einer seitlichen Verschiebung (ggf. in Verbindung mit einer vorherigen Absenkung und einem anschließenden Hochfahren) des Biegekopfes 6. Hierdurch wird auch ein besonders rascher Wechsel der Biegerichtung an einem zu behandelndem Werkstück 2 möglich.The arrangement of the support jaws 11 and 12 with the respective supporting and moving elements such that they are parallel to each other and the supplied workpiece 2 and are only so far apart that their Formnuten 28 always abut on both sides of the workpiece 2 against this results in a very slim and space-saving overall arrangement, which is also well suited for retrofitting in an existing bending machine. This compact design can also be produced according to reasonably priced, ensures a large bending space and requires to change the bending direction only the execution of small displacement movements on the support jaws 11 and 12 and a lateral displacement (possibly in conjunction with a previous lowering and a subsequent startup) of the Bending head 6. This also a particularly rapid change of the bending direction on a workpiece 2 to be treated is possible.

Die Stützbacken 11 und 12 können in der gezeigten Ordnung unterschiedliche Funktionen ausüben:The support jaws 11 and 12 can perform different functions in the order shown:

Sie können feststehend bei einer Relativbewegung zwischen dem Werkstück 2 und dem Stützbacken 11 bzw. 12 beim Rotationszugbiegen eingesetzt werden, auch gesteuert in Funktion einer Gleitschiene, wenn keine Relativbewegung zwischen Werkstück und Stützbacken bei einem Rotationszugbiegen mit im Biegeprozeß bewegtem Stützbacken vorliegt, oder auch als reines Stützelement dienen, wenn keine Relativbewegung zwischen dem Werkstück 2 und dem Stützbacken 11 bzw. 12 bei einem reinen Abrollbiegen mit unbewegtem Werkstück 2 und unbewegtem Stützbacken 11 bzw. 12 erfolgt.They can be used fixedly in a relative movement between the workpiece 2 and the support jaws 11 and 12 in the Rotationszugbiegen, also controlled in function of a slide when no relative movement between the workpiece and jaws in a Rotationszugbiegen moved in the bending process jaws is present, or serve as a pure support member when no relative movement between the workpiece 2 and the support jaws 11 and 12 in a pure unrolling rolling with unmoved workpiece 2 and unmoved support jaws 11 and 12, respectively.

Claims (12)

  1. Support jaw arrangement for sliding lateral support of rod and tubular workpieces (2) before their inlet into the forming groove (9) of a bending disc (7) of a bending head (6) of a bending machine (1), with two support jaws (11, 12) arranged on either side of the longitudinal axis of the workpiece (2) to be machined and each fitted with a forming groove (28) facing the workpiece (2) for lateral support thereon, wherein each support jaw (11, 12) is guided linearly mobile on a guide block (19, 20) and can be moved by an allocated drive device (23, 24) out of a starting position retracted against the transport direction of the workpiece (2), parallel thereto into an end position extended in the transport direction of the workpiece (2) in which the supporting jaw (11, 12) supports the workpiece (2) laterally sliding in an area from its tangential inlet into the forming groove (9) of the bending disc (7) to a point at a prespecified distance in front of this, characterised in that the two supporting jaws (11, 12) always lie sliding laterally against the workpiece (2), wherein each supporting jaw (11, 12) is attached on a holder (13, 14) on a carrier strip (15, 16) guided linearly mobile on the guide block (19, 20), which strip can be moved by the allocated drive device (23, 24), wherein the two carrier strips (15, 16) are driven by the drive device (23, 24) such that when one of the two support jaws (11, 12) is in its extended end position, the other support jaw (12, 11) assumes its retracted position.
  2. Support jaw arrangement according to claim 1, characterised in that each carrier strip (15, 16) is connected to its own drive device (23, 24).
  3. Support jaw arrangement according to claim 1 or 2, characterised in that each support jaw (11, 12) is made of a hard plastic, in particular polyamide.
  4. Support jaw arrangement according to any of claims 1 to 3, characterised in that each holder (13, 14) carrying a support jaw (11, 12) is detachably fixed to the allocated carrier strip (15, 16) and positionally mobile in the direction towards the workpiece (2) to be machined.
  5. Support jaw arrangement according to any of claims 1 to 4, characterised in that each carrier strip (15, 16) is mounted on the allocated guide block (19, 20) by means of a linear guidance system with recirculating linear ball bearings.
  6. Support jaw arrangement according to any of claims 1 to 4, characterised in that each carrier strip (15, 16) is mounted on the allocated guide block (19, 20) by means of a linear dovetail guidance system.
  7. Support jaw arrangement according to any of claims 1 to 6, characterised in that at each holder (13, 14) is provided an adjustment device for the support jaw (11, 12), by means of which said jaw is finely adjustable in relation to the holder (13, 14) in the direction perpendicular to the longitudinal axis of the carrier strip (15, 16) and in its height position.
  8. Support jaw arrangement according to any of claims 1 to 7, characterised in that a central control unit is provided for control of the/all drive device(s) (23, 24) for the carrier strips (15, 16).
  9. Support jaw arrangement according to any of claims 1 to 8, characterised in that support jaw used (11, 12) is moved together with the workpiece (2) during the bending process until it reaches its extended end position.
  10. Support jaw arrangement according to any of claims 1 to 9, characterised in that the drive device(s) (23, 24) for the carrier strips (11, 12) is (are) (a) pneumatic cylinder(s) or (a) servo drive(s).
  11. Support jaw arrangement according to any of claims 1 to 10, characterised in that all its parts (11-26) are mounted on a common base plate (27) to form one assembly unit for installation on a bending machine (1).
  12. Bending machine (19) for left and right bending of rod and tubular workpieces (2) by means of a bending head (6) which can be moved sideways to the longitudinal axis of the workpiece (2), fitted with a support jaw arrangement according to any of claims 1 to 11.
EP08018255A 2008-10-17 2008-10-17 Support split assembly for gliding side supports of rod and tube-shape workpieces on bending machines Active EP2177287B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT08018255T ATE535323T1 (en) 2008-10-17 2008-10-17 SUPPORT JAW ARRANGEMENT FOR SLIDING SIDE SUPPORT OF ROD AND TUBULAR WORKPIECES ON BENDING MACHINES
EP08018255A EP2177287B1 (en) 2008-10-17 2008-10-17 Support split assembly for gliding side supports of rod and tube-shape workpieces on bending machines
JP2009226826A JP5114464B2 (en) 2008-10-17 2009-09-30 Support jaw structure for sliding lateral support of rod shape and tubular workpiece in bending machine
US12/579,990 US8359896B2 (en) 2008-10-17 2009-10-15 Support jaw arrangement for sliding lateral support of rod-shaped and tubular workpieces in bending machines
CN2009101797918A CN101722220B (en) 2008-10-17 2009-10-19 Support jaw arrangement for sliding lateral support of rod-shaped and tubular workpieces in bending machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08018255A EP2177287B1 (en) 2008-10-17 2008-10-17 Support split assembly for gliding side supports of rod and tube-shape workpieces on bending machines

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EP2177287A2 EP2177287A2 (en) 2010-04-21
EP2177287A3 EP2177287A3 (en) 2011-05-11
EP2177287B1 true EP2177287B1 (en) 2011-11-30

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EP (1) EP2177287B1 (en)
JP (1) JP5114464B2 (en)
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AT (1) ATE535323T1 (en)

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Also Published As

Publication number Publication date
EP2177287A2 (en) 2010-04-21
EP2177287A3 (en) 2011-05-11
ATE535323T1 (en) 2011-12-15
CN101722220B (en) 2012-10-24
US8359896B2 (en) 2013-01-29
JP2010094736A (en) 2010-04-30
US20100095732A1 (en) 2010-04-22
CN101722220A (en) 2010-06-09
JP5114464B2 (en) 2013-01-09

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