EP1405680B1 - Bending machine with rotatable bending head - Google Patents

Bending machine with rotatable bending head Download PDF

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Publication number
EP1405680B1
EP1405680B1 EP20020022075 EP02022075A EP1405680B1 EP 1405680 B1 EP1405680 B1 EP 1405680B1 EP 20020022075 EP20020022075 EP 20020022075 EP 02022075 A EP02022075 A EP 02022075A EP 1405680 B1 EP1405680 B1 EP 1405680B1
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EP
European Patent Office
Prior art keywords
tool
driving motor
bending
bending machine
conductor
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.)
Expired - Lifetime
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EP20020022075
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German (de)
French (fr)
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EP1405680A1 (en
Inventor
Frank Schmauder
Jürgen Wolf
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Trumpf Rohrtechnik GmbH and Co KG
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Trumpf Rohrtechnik GmbH and Co KG
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Priority to EP20020022075 priority Critical patent/EP1405680B1/en
Priority to DE50205694T priority patent/DE50205694D1/en
Publication of EP1405680A1 publication Critical patent/EP1405680A1/en
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Publication of EP1405680B1 publication Critical patent/EP1405680B1/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
    • B21D7/024—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 bending machine for bending rod and / or rod-like workpieces, in particular of tubes, with a frame and with a tool unit having at least one bending tool, which is mounted on the side remote from the frame side of a support arm, wherein the support arm parallel extends to the longitudinal direction of the workpieces to be machined between the frame and the tool unit, wherein at least one tool drive motor for actuating a bending tool provided and the tool unit by means of at least one rotary drive motor about a parallel to the longitudinal direction of the machined Workpieces extending axis of rotation relative to the frame is rotatable (see, for example, EP-A-1 226 887).
  • Such a pipe bending machine is also disclosed in DE 40 10 445 A1.
  • the previously known machine comprises a tool unit, which is connected via a support arm in the form of a bending table with a frame.
  • the tool unit is jointly rotatable with the bending table about an axis of rotation parallel to the axis of the tubes to be machined.
  • rotation of the assembly of bending table and tool unit can be converted into its functional position depending on the processing to be performed by one of two provided on opposite sides of the tool unit bending tools. This allows either right or left bends and bends with different bending radii produce.
  • the rotary drive motor for rotating bending table and tool unit is housed in the frame of the prior art machine, a tool drive motor for actuating the bending tools of the tool unit in the bending table.
  • the connection between the rotary drive motor or the tool drive motor and the one or more machine parts to be driven in each case is produced by means of conventional gear elements.
  • the present invention has set itself the goal.
  • this object is achieved by the bending machine according to claim 1. Accordingly, at least one rotary drive motor of the tool unit and at least one tool drive motor for actuating a bending tool in the immediate vicinity of each machine part to be driven are arranged.
  • Support arm and tool unit form with the respective drive motors a self-contained assembly that can be tailored to the particular application requirements, such as changing bending drive performance.
  • the frame of the bending machine according to the invention can also be made small. Functionally, the frame can be consistently limited to its supporting tasks.
  • Claim 2 describes the inventively preferred form of connection of the tool drive motors or with an associated energy source. Accordingly, during the rotation of a tool drive motor, a relative movement results between the motor-side part of at least one power supply line and the line part remote from the tool drive motor. This circumstance is taken into account by appropriate dimensioning of the length of the power supply line between the drive motor side and the line part lying to the energy source. With structurally simple means as a functionally reliable energy coupling is ensured in the relevant tool drive motor regardless of its rotational mobility.
  • the power supply line of the tool drive motor is guided between the lying to the power source line part and its drive motor side. Damage to the cables and associated breakdowns can be effectively avoided.
  • a guide chain is provided according to claim 4 as a line guide.
  • Such guide chains provide for a guided movement of the relevant line section of the power supply line; on the other hand, they protect the guided line section against harmful external influences, in particular damage.
  • the line section between the line part lying to the energy source and the drive motor side of the power supply line , Where appropriate, the wiring, runs on the support arm.
  • the line receptacle provided according to claim 6 on the support arm ensures a defined housing of said line section of the power supply line or the wiring.
  • the line receptacle on the support arm according to the invention is designed such that a secure housing of the wiring or the relevant line section of the power supply line is ensured without the compact design of the overall arrangement would be impaired.
  • the mass to be moved by the rotary drive motor of the tool unit is reduced to a minimum. This allows on the one hand the use of rotary drive motors with relatively low drive power; on the other hand, due to the reduction in mass, a highly accurate positioning of the tool unit is simplified.
  • a bending machine 1 for processing pipes has a frame 2 with a pipe feed 3 and a tool unit 4.
  • a for clarity not shown in Fig. 1 tube 5 is indicated in Fig. 2.
  • the pipe feed 3 comprises a feed carriage 6, which is largely covered in Fig. 1 by a machine cover 7 and provided on its visible front with a collet 8.
  • the feed carriage 6 is on the frame 2 in the longitudinal direction 9 to be processed tubes 5 back and forth movable.
  • the collet 8 is used in the usual way for holding the remote from the tool unit 4 ends of the tubes 5 and is rotatable in the direction of a double arrow 10.
  • the bending tools 11, 12 are conventional Rotationszugbiegewerkmaschinee, each having a bending die, a clamping jaw and a slide rail as tool parts.
  • the bending tool 11 comprises a bending die 13, a clamping jaw 14 and a slide rail 15, the bending tool 12 a bending die 16, a clamping jaw 17 and a slide rail 18.
  • the clamping jaws 14, 17 are displaceable on a bending arm 19 of the tool unit 4 in the direction of a double arrow 20.
  • the slide rails 15, 18 are movable on a guide part 21 of the tool unit 4.
  • the bending dies 13, 16 can be rotated about a common bending axis 22.
  • the bending arm 19 is pivotable about the bending axis 22.
  • the rotational movement of the bending dies 13, 16 and the associated pivotal movement of the bending arm 19 is effected by means of a tool drive motor 23.
  • a tool drive motor 24 for performing the rectified translational movement of the slide rails 15, 18, a tool drive motor 25, which is covered in Fig. 1 by the tool drive motor 24.
  • a tool drive motor for translational movement of the slide rails 15, 18 may be provided in the longitudinal direction 9 of the tubes 5 to be processed. 1, all tool drive motors 23, 24, 25 are integrated into the tool unit 4.
  • the tool unit 4 including the tool drive motors 23, 24, 25 about an axis of rotation 26 in the direction of a double arrow 27 is rotatable.
  • the tool unit 4 is movably mounted on a support arm 28 in the direction of the double arrow 27.
  • a rotary drive motor 29 the tool unit 4 is shown in Fig. 5 housed inside the support arm 28.
  • the geometric axis of its motor shaft coincides with the axis of rotation 26 of the tool unit 4.
  • the rotary drive motor 29 and the tool drive motors 23, 24, 25 are compact electric motors.
  • the support arm 28 is in turn attached to one end of a pivot support 31.
  • the pivot support 31 in turn is rotatably mounted on the frame 2 about a pivot support axis 32. All in all, the tool unit 4 thus has two axes of rotation, namely, on the one hand, the axis of rotation 26 and, on the other, the pivot carrier pivot axis 32.
  • the tube 5 between one of the bending dies 13, 16 and the associated clamping jaw 14, 17 is to be clamped in the usual way first.
  • the relevant clamping jaw 14, 17 is moved by means of the tool drive motor 24 from an inoperative position to the bending die 13, 16 out.
  • the respective slide rail 15, 18 is moved by means of the tool drive motor 25 in a position close to the pipe, when they take it can support the pipe 5 in its transverse direction.
  • the in-service bending die 13, 16 is rotated about the bending axis 22 by means of the tool drive motor 23 and at the same time the bending arm 19 pivoted about the bending axis 22.
  • the tube 5 is bent around the respective bending die 13, 16.
  • the rotational or pivoting mobility of the tool unit 4 with respect to the axis of rotation 26 and the pivot carrier axis of rotation 32 is used to convert the bending tool 11, 12 provided for workpiece machining relative to the tube 5 into the functional position.
  • the kinematics of the tool unit 4 during initial bending of the tube 5 by means of the bending tool 11 and subsequent processing by means of the bending tool 12 is illustrated in FIG. 2. This transition from the bending tool 11 to the bending tool 12 is completed when successive bends are to be made in opposite directions. In the example shown, a change in the bending radius is connected to the change of the bending direction.
  • the bending die 13 of the bending tool 11 forms a larger bending radius than the bending die 16 of the bending tool 12.
  • the bending tool 11 is open.
  • the clamping jaw 14 and the slide rail 15 are moved into a non-functional position away from the pipe.
  • the tool unit 4 is moved to a position while rotating about the rotation axis 26 and pivoting about the pivot support axis 32, in which the bending die 13 of the bending tool 11, the tube 5 releases and the entire tool unit 4 can be rotated or transferred to the transfer of the bending tool 12 in a tubular position (partial views 2 to 4 of Fig. 2).
  • the tool unit 4 is positioned relative to the tube 5 such that the tube 5 comes to rest in the circumferential groove of the bending die 16 of the bending tool 12 (partial views 5 to 7 of FIG. 2). Finally, the bending tool 12 is closed (partial view 8 of Fig. 2) and carried out the next bending operation.
  • the tool drive motors 23, 24, 25 on the tool unit 4 and the rotary drive motor 29 on the support arm 28 are connected during the pivotal movement of the tool unit 4 with its power source.
  • Tragarm detergent 31 terminals are provided on the pivot support, from which lead portions of the power supply lines to the rotary drive motor 29 and the tool drive motors 23, 24, 25.
  • the power supply lines for the tool drive motors 23, 24, 25 extend from the mentioned terminals inside guide chains 34, 35 ( Figures 3 to 5).
  • Such guide chains are described for example in DE 43 02 757 C1 in detail.
  • the guide chains 34, 35 as well as the energy supply lines accommodated in their interior run in the form of loops on the outer wall of a housing 36 formed by the support arm 28 for the rotary drive motor 29.
  • the tubular housing 36 is rigidly connected to the pivot support 31 on the frame side.
  • the housing 36 supports and guides the bearing flange 30, via which the tool unit 4 is rotatably connected to the pivot support 31 about the axis of rotation 26.
  • Rotatable with the bearing flange 30 are terminals 37, 38, with which the power supply lines of the tool drive motors 23, 24, 25 are provided on their drive motor side.
  • the guide chains 34, 35 also accommodate control lines for the tool drive motors 23, 24, 25.
  • control lines are also guided via the pivot carrier side terminals and through the interior of the pivot carrier 31 to the frame 2 of the bending machine 1.
  • the guide chains 34, 35 slide on the housing 36 of the rotary drive motor 29.
  • the pivot axes of their chain links hang the guide chains 34, 35 at most slightly in the direction of gravity.
  • Both the length of the guide chains 34, 35 and the length of the guided in these lines is tuned to the maximum amount of relative rotational movement, which is performed by the tool unit 4 relative to the pivot support 31.
  • a cover panel 39 of the support arm 28 shown in FIG. 5 concentrically encloses the housing 36 of the rotary drive motor 29 and together with the housing 36 defines a cable receptacle 40 with an annular cross-section.

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

Description

Die Erfindung betrifft eine Biegemaschine zum Biegen von stangen- und/oder stabartigen Werkstücken, insbesondere von Rohren, mit einem Gestell sowie mit einer wenigstens ein Biegewerkzeug aufweisenden Werkzeugeinheit, welche an der von dem Gestell abliegenden Seite eines Tragarms gelagert ist, wobei sich der Tragarm parallel zu der Längsrichtung der zu bearbeitenden Werkstücke zwischen dem Gestell und der Werkzeugeinheit erstreckt, wobei wenigstens ein Werkzeugantriebsmotor zur Betätigung eines Biegewerkzeugs vorgesehen und die Werkzeugeinheit mittels wenigstens eines Drehantriebsmotors um eine parallel zu der Längsrichtung der zu bearbeitenden Werkstücke verlaufende Drehachse gegenüber dem Gestell drehbar ist (siehe z.B. EP-A-1 226 887).The invention relates to a bending machine for bending rod and / or rod-like workpieces, in particular of tubes, with a frame and with a tool unit having at least one bending tool, which is mounted on the side remote from the frame side of a support arm, wherein the support arm parallel extends to the longitudinal direction of the workpieces to be machined between the frame and the tool unit, wherein at least one tool drive motor for actuating a bending tool provided and the tool unit by means of at least one rotary drive motor about a parallel to the longitudinal direction of the machined Workpieces extending axis of rotation relative to the frame is rotatable (see, for example, EP-A-1 226 887).

Eine derartige Rohrbiegemaschine ist auch offenbart in DE 40 10 445 Al. Die vorbekannte Maschine umfasst eine Werkzeugeinheit, die über einen Tragarm in Form eines Biegetischs mit einem Gestell verbunden ist. Die Werkzeugeinheit ist gemeinschaftlich mit dem Biegetisch um eine parallel zu der Achse der zu bearbeitenden Rohre verlaufende Drehachse drehbar. Durch Drehung der Baueinheit aus Biegetisch und Werkzeugeinheit kann in Abhängigkeit von der durchzuführenden Bearbeitung eines von zwei an einander gegenüberliegenden Seiten der Werkzeugeinheit vorgesehenen Biegewerkzeugen in seine Funktionsstellung überführt werden. Es lassen sich dadurch wahlweise Rechts- oder Linksbiegungen sowie Biegungen mit unterschiedlichen Biegeradien erzeugen. Der Drehantriebsmotor zur Drehung von Biegetisch und Werkzeugeinheit ist in dem Gestell der vorbekannten Maschine, ein Werkzeugantriebsmotor zur Betätigung der Biegewerkzeuge der Werkzeugeinheit in dem Biegetisch untergebracht. Die Verbindung zwischen dem Drehantriebsmotor bzw. dem Werkzeugantriebsmotor und dem oder den jeweils anzutreibenden Maschinenteilen ist mittels üblicher Getriebeelemente hergestellt.Such a pipe bending machine is also disclosed in DE 40 10 445 A1. The previously known machine comprises a tool unit, which is connected via a support arm in the form of a bending table with a frame. The tool unit is jointly rotatable with the bending table about an axis of rotation parallel to the axis of the tubes to be machined. By rotation of the assembly of bending table and tool unit can be converted into its functional position depending on the processing to be performed by one of two provided on opposite sides of the tool unit bending tools. This allows either right or left bends and bends with different bending radii produce. The rotary drive motor for rotating bending table and tool unit is housed in the frame of the prior art machine, a tool drive motor for actuating the bending tools of the tool unit in the bending table. The connection between the rotary drive motor or the tool drive motor and the one or more machine parts to be driven in each case is produced by means of conventional gear elements.

Eine Maschine mit kompakter Bauweise bereitzustellen, hat sich die vorliegende Erfindung zum Ziel gesetzt.To provide a machine with a compact design, the present invention has set itself the goal.

Erfindungsgemäß gelöst wird diese Aufgabe durch die Biegemaschine nach Patentanspruch 1. Im Sinne der Erfindung sind demnach wenigstens ein Drehantriebsmotor der Werkzeugeinheit sowie wenigstens ein Werkzeugantriebsmotor zur Betätigung eines Biegewerkzeuges in unmittelbarer Nähe des jeweils anzutreibenden Maschinenteiles angeordnet. Der Umfang, in welchem Einbauraum benötigende und massebehaftete Getriebeelemente zwischen Drehantriebsmotor und Werkzeugeinheit bzw. zwischen Werkzeugantriebsmotor und Biegewerkzeug vorzusehen sind, reduziert sich somit auf ein Minimum. In der Folge ergibt sich eine Antriebs-Gesamtkonfiguration, die sich durch eine kompakte und massearme Bauweise auszeichnet. Tragarm und Werkzeugeinheit bilden mit den jeweiligen Antriebsmotoren eine in sich abgeschlossene Baugruppe, die auf die jeweiligen Einsatzerfordernisse, etwa auf wechselnde Biegeantriebsleistungen, abgestimmt werden kann. Aufgrund der Konzentration der erforderlichen Antriebstechnik außerhalb des Gestells erübrigt es sich, an dem Gestell der erfindungsgemäßen Biegemaschine entsprechenden Einbauraum bereitzustellen. Infolgedessen kann auch das Gestell der erfindungsgemäßen Biegemaschine klein bauen. Funktionell lässt sich das Gestell konsequent auf die ihm obliegenden tragenden Aufgaben beschränken.According to the invention, this object is achieved by the bending machine according to claim 1. Accordingly, at least one rotary drive motor of the tool unit and at least one tool drive motor for actuating a bending tool in the immediate vicinity of each machine part to be driven are arranged. The extent to which installation space requiring and mass-applied gear elements between the rotary drive motor and tool unit or between tool drive motor and bending tool are to be provided, thus reduced to a minimum. This results in a drive overall configuration, which is characterized by a compact and low-mass design. Support arm and tool unit form with the respective drive motors a self-contained assembly that can be tailored to the particular application requirements, such as changing bending drive performance. Due to the concentration of the required drive technology outside of the frame, it is unnecessary to provide corresponding mounting space on the frame of the bending machine according to the invention. As a result, the frame of the bending machine according to the invention can also be made small. Functionally, the frame can be consistently limited to its supporting tasks.

Besondere Ausführungsarten der Biegemaschine nach Patentanspruch 1 ergeben sich aus den abhängigen Patentansprüchen 2 bis 12.Particular embodiments of the bending machine according to claim 1 emerge from the dependent claims 2 to 12.

Patentanspruch 2 beschreibt die erfindungsgemäß bevorzugte Form der Verbindung des oder der Werkzeugantriebsmotoren mit einer zugehörigen Energiequelle. Demnach ergibt sich bei der Drehung eines Werkzeugantriebsmotors eine Relativbewegung zwischen dem motorseitigen Teil wenigstens einer Energieversorgungsleitung und dem von dem Werkzeugantriebsmotor abliegenden Leitungsteil. Dieser Umstand wird durch entsprechende Bemessung der Länge der Energieversorgungsleitung zwischen der Antriebsmotorseite und dem zu der Energiequelle hin liegenden Leitungsteil berücksichtigt. Mit konstruktiv einfachen Mitteln wird so eine funktionssichere Energieeinkopplung in den betreffenden Werkzeugantriebsmotor ungeachtet dessen Drehbeweglichkeit sichergestellt.Claim 2 describes the inventively preferred form of connection of the tool drive motors or with an associated energy source. Accordingly, during the rotation of a tool drive motor, a relative movement results between the motor-side part of at least one power supply line and the line part remote from the tool drive motor. This circumstance is taken into account by appropriate dimensioning of the length of the power supply line between the drive motor side and the line part lying to the energy source. With structurally simple means as a functionally reliable energy coupling is ensured in the relevant tool drive motor regardless of its rotational mobility.

Ausweislich Patentanspruch 3 ist die Energieversorgungsleitung des Werkzeugantriebsmotors zwischen dem zu der Energiequelle hin liegenden Leitungsteil und ihrer Antriebsmotorseite geführt. Leitungsschäden und damit verbundene Betriebsstörungen lassen sich dadurch wirksam vermeiden.As shown in claim 3, the power supply line of the tool drive motor is guided between the lying to the power source line part and its drive motor side. Damage to the cables and associated breakdowns can be effectively avoided.

In bevorzugter Ausgestaltung der Erfindung ist gemäß Patentanspruch 4 als Leitungsführung eine Führungskette vorgesehen. Derartige Führungsketten sorgen zum einen für eine geführte Bewegung des betreffenden Leitungsabschnittes der Energieversorgungsleitung; zum andern schützen sie den geführten Leitungsabschnitt gegen schädliche äußere Einflüsse, insbesondere Beschädigungen.In a preferred embodiment of the invention, a guide chain is provided according to claim 4 as a line guide. Such guide chains provide for a guided movement of the relevant line section of the power supply line; on the other hand, they protect the guided line section against harmful external influences, in particular damage.

Im Einklang mit dem erfindungsgemäßen Grundkonzept, die Antriebstechnik für die Werkzeugeinheit bzw. wenigstens eines der Biegewerkzeuge außerhalb des Maschinengestells zu konzentrieren, ist im Falle der Erfindungsbauart nach Patentanspruch 5 vorgesehen, dass der Leitungsabschnitt zwischen dem zu der Energiequelle hin liegenden Leitungsteil und der Antriebsmotorseite der Energieversorgungsleitung, gegebenenfalls auch die Leitungsführung, an dem Tragarm verläuft. Die gemäß Patentanspruch 6 an dem Tragarm vorgesehene Leitungsaufnahme sorgt dabei für eine definierte Unterbringung des genannten Leitungsabschnittes der Energieversorgungsleitung bzw. der Leitungsführung. Dabei ist die Leitungsaufnahme an dem Tragarm erfindungsgemäß derart gestaltet, dass eine geschützte Unterbringung der Leitungsführung bzw. des betreffenden Leitungsabschnittes der Energieversorgungsleitung sichergestellt ist, ohne dass die kompakte Bauweise der Gesamtanordnung beeinträchtigt wäre.In accordance with the basic concept according to the invention of concentrating the drive technology for the tool unit or at least one of the bending tools outside the machine frame, it is provided in the case of the invention type according to claim 5, that the line section between the line part lying to the energy source and the drive motor side of the power supply line , Where appropriate, the wiring, runs on the support arm. The line receptacle provided according to claim 6 on the support arm ensures a defined housing of said line section of the power supply line or the wiring. In this case, the line receptacle on the support arm according to the invention is designed such that a secure housing of the wiring or the relevant line section of the power supply line is ensured without the compact design of the overall arrangement would be impaired.

In weiterer bevorzugter Ausgestaltung der erfindungsgemäßen Biegemaschine ist ausweislich Patentanspruch 7 vorgesehen, dass der Leitungsabschnitt zwischen dem zu der Energiequelle hin liegenden Leitungsteil und der Antriebsmotorseite der Energieversorgungsleitung an dem Tragarm schleifenförmig verläuft. Auf diese Art und Weise lässt sich mit einfachsten Mitteln die aufgrund der Drehbeweglichkeit des Werkzeugantriebsmotors benötigte Leitungsreserve bereitstellen.In a further preferred embodiment of the bending machine according to the invention, it is evidently provided in patent claim 7 that the line section runs loop-shaped between the line part lying to the energy source and the drive motor side of the power supply line on the support arm. In this way, the line reserve required due to the rotational mobility of the tool drive motor can be provided with the simplest means.

Im Falle der Erfindungsbauart nach Patentanspruch 9 sind neben wenigstens einer Energieversorgungsleitung weitere Verbindungsleitungen für zumindest einen Werkzeugantriebsmotor vorgesehen und entsprechend den vorstehend im Einzelnen beschriebenen Merkmalen der Energieversorgungsleitung ausgebildet.In the case of Erfindungsbauart according to claim 9 further connecting lines for at least one tool drive motor are provided in addition to at least one power supply line and formed according to the features of the power supply line described in detail above.

Im Interesse einer kompakten Bauweise der Gesamtanordnung sind die kennzeichnenden Merkmale der Patentansprüche 8 und 10 vorgesehen.In the interest of a compact design of the overall arrangement, the characterizing features of claims 8 and 10 are provided.

Im Falle der Erfindungsvariante nach Patentanspruch 11 ist die von dem Drehantriebsmotor der Werkzeugeinheit zu bewegende Masse auf ein Minimum reduziert. Dies ermöglicht zum einen den Einsatz von Drehantriebsmotoren mit relativ geringer Antriebsleistung; zum andern vereinfacht sich aufgrund der Massenreduzierung eine hochgenaue Positionierung der Werkzeugeinheit.In the case of the variant of the invention according to claim 11, the mass to be moved by the rotary drive motor of the tool unit is reduced to a minimum. This allows on the one hand the use of rotary drive motors with relatively low drive power; on the other hand, due to the reduction in mass, a highly accurate positioning of the tool unit is simplified.

Eine Erfindungsbauart, im Falle derer sich das Grundkonzept der Erfindung als besonders vorteilhaft erweist, ist in Patentanspruch 12 beschrieben. An derartigen Biegemaschinen wird die mit wenigstens einem Werkzeugantriebsmotor versehene Werkzeugeinheit um eine Drehachse gedreht und außerdem der Tragarm mit dem Drehantriebsmotor um die anspruchsgemäße Schwenkträgerdrehachse geschwenkt. Ungeachtet dieser kinematischen Gegebenheiten lassen sich aufgrund der erfindungsgemäß vorgesehenen Anordnung der Antriebsmotoren in nächster Nähe der anzutreibenden Maschinenteile die benötigten Antriebsverbindungen mit geringem Aufwand herstellen.An invention type, in which the basic concept of the invention proves to be particularly advantageous, is described in claim 12. At such bending machines, the tool unit provided with at least one tool drive motor is rotated about a rotation axis and, in addition, the support arm with the rotary drive motor is pivoted about the pivot bearing axis which is required. Regardless of these kinematic conditions can be due to the inventively provided arrangement of the drive motors in the immediate vicinity of the driven machine parts produce the required drive connections with little effort.

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

Fig. 1
eine perspektivische Gesamtdarstellung einer Biegemaschine zum Biegen von Rohren mit einem Gestell und einer daran über einen Tragarm gehaltenen Werkzeugeinheit,
Fig. 2
schematische Einzeldarstellungen zur Kinematik der Werkzeugeinheit gemäß Fig. 1,
Fign. 3 und 4
den Bereich des Tragarms gemäß Fig. 1 in der Seitenansicht sowie in perspektivischer Darstellung und
Fig. 5
einen Schnitt durch den Tragarm gemäß den Fign. 1, 3 und 4 mit einem in Fig. 4 durch die Linie v-v angedeuteten Schnittverlauf.
The invention will be explained in more detail with reference to schematic representations of an embodiment. Show it:
Fig. 1
an overall perspective view of a bending machine for bending pipes with a frame and held thereon a support arm tool unit,
Fig. 2
schematic single representations for the kinematics of the tool unit according to FIG. 1,
FIGS. 3 and 4
the area of the support arm of FIG. 1 in the side view and in perspective view and
Fig. 5
a section through the support arm according to FIGS. 1, 3 and 4 with a in Fig. 4 indicated by the line vv cutting profile.

Gemäß Fig. 1 weist eine Biegemaschine 1 zum Bearbeiten von Rohren ein Gestell 2 mit einem Rohrvorschub 3 und einer Werkzeugeinheit 4 auf. Ein in Fig. 1 der Übersichtlichkeit halber nicht dargestelltes Rohr 5 ist in Fig. 2 angedeutet.According to FIG. 1, a bending machine 1 for processing pipes has a frame 2 with a pipe feed 3 and a tool unit 4. A for clarity not shown in Fig. 1 tube 5 is indicated in Fig. 2.

Der Rohrvorschub 3 umfasst einen Vorschubwagen 6, der in Fig. 1 von einer Maschinenabdeckung 7 weitgehend verdeckt und an seiner sichtbaren Vorderseite mit einer Spannzange 8 versehen ist. Der Vorschubwagen 6 ist auf dem Gestell 2 in Längsrichtung 9 zu bearbeitender Rohre 5 hin und her verfahrbar. Die Spannzange 8 dient in gewohnter Weise zur Halterung der von der Werkzeugeinheit 4 abliegenden Enden der Rohre 5 und ist in Richtung eines Doppelpfeils 10 drehbeweglich. Durch translatorische Bewegung des Vorschubwagens 6 in Längsrichtung 9 der Rohre 5 sowie durch Drehbewegung der Spannzange 8 in Richtung des Doppelpfeils 10 werden zu bearbeitende Rohre 5 vor der Bearbeitung gegenüber der Werkzeugeinheit 4, im Einzelnen gegenüber einem von zwei Biegewerkzeugen 11, 12 der Werkzeugeinheit 4, ausgerichtet. Die Bewegungen von Vorschubwagen 6 und Spannzange 8 sind ebenso wie die übrigen Funktionen der Biegemaschine 1 rechnergesteuert.The pipe feed 3 comprises a feed carriage 6, which is largely covered in Fig. 1 by a machine cover 7 and provided on its visible front with a collet 8. The feed carriage 6 is on the frame 2 in the longitudinal direction 9 to be processed tubes 5 back and forth movable. The collet 8 is used in the usual way for holding the remote from the tool unit 4 ends of the tubes 5 and is rotatable in the direction of a double arrow 10. By translational movement of the feed carriage 6 in the longitudinal direction 9 of the tubes 5 and by rotational movement of the collet 8 in the direction of the double arrow 10 to be processed tubes 5 before processing relative to the tool unit 4, in detail with respect to one of two bending tools 11, 12 of the tool unit 4, aligned. The movements of feed carriage 6 and collet 8 are computer controlled as well as the other functions of the bending machine 1.

Bei den Biegewerkzeugen 11, 12 handelt es sich um herkömmliche Rotationszugbiegewerkzeuge, die als Werkzeugteile jeweils eine Biegematrize, eine Spannbacke und eine Gleitschiene aufweisen. Im Einzelnen umfasst das Biegewerkzeug 11 eine Biegematrize 13, eine Spannbacke 14 und eine Gleitschiene 15, das Biegewerkzeug 12 eine Biegematrize 16, eine Spannbacke 17 und eine Gleitschiene 18. Die Spannbacken 14, 17 sind auf einem Biegearm 19 der Werkzeugeinheit 4 in Richtung eines Doppelpfeils 20 verschiebbar. Entsprechend sind die Gleitschienen 15, 18 auf einem Führungsteil 21 der Werkzeugeinheit 4 beweglich. Die Biegematrizen 13, 16 lassen sich um eine gemeinsame Biegeachse 22 drehen. Der Biegearm 19 ist um die Biegeachse 22 schwenkbar.The bending tools 11, 12 are conventional Rotationszugbiegewerkzeuge, each having a bending die, a clamping jaw and a slide rail as tool parts. In detail, the bending tool 11 comprises a bending die 13, a clamping jaw 14 and a slide rail 15, the bending tool 12 a bending die 16, a clamping jaw 17 and a slide rail 18. The clamping jaws 14, 17 are displaceable on a bending arm 19 of the tool unit 4 in the direction of a double arrow 20. Accordingly, the slide rails 15, 18 are movable on a guide part 21 of the tool unit 4. The bending dies 13, 16 can be rotated about a common bending axis 22. The bending arm 19 is pivotable about the bending axis 22.

Die Drehbewegung der Biegematrizen 13, 16 sowie die damit einhergehende Schwenkbewegung des Biegearms 19 wird mittels eines Werkzeugantriebsmotors 23 bewirkt. Zur Ausführung der translatorischen Bewegung der Spannbacken 14, 17 in Richtung des Doppelpfeils 20 dient ein Werkzeugantriebsmotor 24, zur Ausführung der gleichgerichteten translatorischen Bewegung der Gleitschienen 15, 18 ein Werkzeugantriebsmotor 25, der in Fig. 1 von dem Werkzeugantriebsmotor 24 verdeckt ist. Zusätzlich kann ein Werkzeugantriebsmotor zur translatorischen Bewegung der Gleitschienen 15, 18 in Längsrichtung 9 der zu bearbeitenden Rohre 5 vorgesehen sein. Gemäß Fig. 1 sind sämtliche Werkzeugantriebsmotoren 23, 24, 25 in die Werkzeugeinheit 4 integriert.The rotational movement of the bending dies 13, 16 and the associated pivotal movement of the bending arm 19 is effected by means of a tool drive motor 23. To execute the translatory movement of the clamping jaws 14, 17 in the direction of the double arrow 20 is a tool drive motor 24, for performing the rectified translational movement of the slide rails 15, 18, a tool drive motor 25, which is covered in Fig. 1 by the tool drive motor 24. In addition, a tool drive motor for translational movement of the slide rails 15, 18 may be provided in the longitudinal direction 9 of the tubes 5 to be processed. 1, all tool drive motors 23, 24, 25 are integrated into the tool unit 4.

Gegenüber dem Gestell 2 ist die Werkzeugeinheit 4 einschließlich der Werkzeugantriebsmotoren 23, 24, 25 um eine Drehachse 26 in Richtung eines Doppelpfeils 27 drehbar. Zu diesem Zweck ist die Werkzeugeinheit 4 an einem Tragarm 28 in Richtung des Doppelpfeils 27 beweglich gelagert. Ein Drehantriebsmotor 29 der Werkzeugeinheit 4 ist ausweislich Fig. 5 im Innern des Tragarms 28 untergebracht. Die geometrische Achse seiner Motorwelle fällt mit der Drehachse 26 der Werkzeugeinheit 4 zusammen. Die Lagerung der Werkzeugeinheit 4 an dem Tragarm 28 erfolgt über einen drehbeweglichen Lagerungsflansch 30. Bei dem Drehantriebsmotor 29 sowie bei den Werkzeugantriebsmotoren 23, 24, 25 handelt es sich um kompakte Elektromotoren.Compared with the frame 2, the tool unit 4 including the tool drive motors 23, 24, 25 about an axis of rotation 26 in the direction of a double arrow 27 is rotatable. For this purpose, the tool unit 4 is movably mounted on a support arm 28 in the direction of the double arrow 27. A rotary drive motor 29 the tool unit 4 is shown in Fig. 5 housed inside the support arm 28. The geometric axis of its motor shaft coincides with the axis of rotation 26 of the tool unit 4. The bearing of the tool unit 4 on the support arm 28 via a rotatable mounting flange 30. The rotary drive motor 29 and the tool drive motors 23, 24, 25 are compact electric motors.

Der Tragarm 28 ist seinerseits an einem Ende eines Schwenkträgers 31 angebracht. Der Schwenkträger 31 wiederum ist um eine Schwenkträgerdrehachse 32 drehbar an dem Gestell 2 gelagert. Alles in allem besitzt die Werkzeugeinheit 4 somit zwei Rotationsachsen, nämlich zum einen die Drehachse 26 und zum andern die Schwenkträgerdrehachse 32.The support arm 28 is in turn attached to one end of a pivot support 31. The pivot support 31 in turn is rotatably mounted on the frame 2 about a pivot support axis 32. All in all, the tool unit 4 thus has two axes of rotation, namely, on the one hand, the axis of rotation 26 and, on the other, the pivot carrier pivot axis 32.

Zur Werkstückbearbeitung ist in üblicher Weise zunächst das Rohr 5 zwischen einer der Biegematrizen 13, 16 und der zugehörigen Spannbacke 14, 17 zu klemmen. Zu diesem Zweck wird die betreffende Spannbacke 14, 17 mittels des Werkzeugantriebsmotors 24 aus einer Außerfunktionsstellung zu der Biegematrize 13, 16 hin bewegt. Die betreffende Gleitschiene 15, 18 wird mittels des Werkzeugantriebsmotors 25 in eine rohrnahe Position verfahren, bei deren Einnahme sie das Rohr 5 in seiner Querrichtung abstützen kann. Anschließend wird die in Funktion befindliche Biegematrize 13, 16 mittels des Werkzeugantriebsmotors 23 um die Biegeachse 22 gedreht und zeitgleich der Biegearm 19 um die Biegeachse 22 geschwenkt. Durch die letztgenannte Dreh-/Schwenkbewegung wird das Rohr 5 um die betreffende Biegematrize 13, 16 gebogen.For workpiece machining, the tube 5 between one of the bending dies 13, 16 and the associated clamping jaw 14, 17 is to be clamped in the usual way first. For this purpose, the relevant clamping jaw 14, 17 is moved by means of the tool drive motor 24 from an inoperative position to the bending die 13, 16 out. The respective slide rail 15, 18 is moved by means of the tool drive motor 25 in a position close to the pipe, when they take it can support the pipe 5 in its transverse direction. Subsequently, the in-service bending die 13, 16 is rotated about the bending axis 22 by means of the tool drive motor 23 and at the same time the bending arm 19 pivoted about the bending axis 22. By the latter rotary / pivoting movement, the tube 5 is bent around the respective bending die 13, 16.

Die Dreh- bzw. Schwenkbeweglichkeit der Werkzeugeinheit 4 bezüglich der Drehachse 26 und der Schwenkträgerdrehachse 32 wird genutzt, um das für die Werkstückbearbeitung vorgesehene Biegewerkzeug 11, 12 gegenüber dem Rohr 5 in die Funktionsstellung zu überführen. Die Kinematik der Werkzeugeinheit 4 bei anfänglicher Biegung des Rohres 5 mittels des Biegewerkzeuges 11 und sich daran anschließender Bearbeitung mittels des Biegewerkzeuges 12 ist in Fig. 2 veranschaulicht. Dieser Übergang von dem Biegewerkzeug 11 auf das Biegewerkzeug 12 wird vollzogen, wenn nacheinander Biegungen in entgegengesetzten Richtungen zu erstellen sind. Im gezeigten Beispielsfall ist mit dem Wechsel der Biegerichtung auch eine Änderung des Biegeradius' verbunden. So bildet die Biegematrize 13 des Biegewerkzeuges 11 einen größeren Biegeradius aus als die Biegematrize 16 des Biegewerkzeuges 12.The rotational or pivoting mobility of the tool unit 4 with respect to the axis of rotation 26 and the pivot carrier axis of rotation 32 is used to convert the bending tool 11, 12 provided for workpiece machining relative to the tube 5 into the functional position. The kinematics of the tool unit 4 during initial bending of the tube 5 by means of the bending tool 11 and subsequent processing by means of the bending tool 12 is illustrated in FIG. 2. This transition from the bending tool 11 to the bending tool 12 is completed when successive bends are to be made in opposite directions. In the example shown, a change in the bending radius is connected to the change of the bending direction. Thus, the bending die 13 of the bending tool 11 forms a larger bending radius than the bending die 16 of the bending tool 12.

Nach Erstellung einer ersten Biegung an dem Rohr 5 (Teildarstellung 1 von Fig. 2) ist das Biegewerkzeug 11 zu öffnen. Zu diesem Zweck werden die Spannbacke 14 sowie die Gleitschiene 15 in eine rohrferne Außerfunktionsstellung verfahren. Danach wird die Werkzeugeinheit 4 unter Drehen um die Drehachse 26 und Schwenken um die Schwenkträgerdrehachse 32 in eine Position bewegt, in welcher die Biegematrize 13 des Biegewerkzeuges 11 das Rohr 5 freigibt und die gesamte Werkzeugeinheit 4 zur Überführung des Biegewerkzeuges 12 in eine rohrnahe Position gedreht bzw. geschwenkt werden kann (Teildarstellungen 2 bis 4 von Fig. 2). Im Anschluss an diese Dreh- bzw. Schwenkbewegung wird die Werkzeugeinheit 4 gegenüber dem Rohr 5 derart positioniert, dass das Rohr 5 in der Umfangsnut der Biegematrize 16 des Biegewerkzeuges 12 zu liegen kommt (Teildarstellungen 5 bis 7 von Fig. 2). Abschließend wird das Biegewerkzeug 12 geschlossen (Teildarstellung 8 von Fig. 2) und der nächste Biegevorgang durchgeführt.After creating a first bend on the tube 5 (partial view 1 of Fig. 2), the bending tool 11 is open. For this purpose, the clamping jaw 14 and the slide rail 15 are moved into a non-functional position away from the pipe. Thereafter, the tool unit 4 is moved to a position while rotating about the rotation axis 26 and pivoting about the pivot support axis 32, in which the bending die 13 of the bending tool 11, the tube 5 releases and the entire tool unit 4 can be rotated or transferred to the transfer of the bending tool 12 in a tubular position (partial views 2 to 4 of Fig. 2). Following this rotary or pivoting movement, the tool unit 4 is positioned relative to the tube 5 such that the tube 5 comes to rest in the circumferential groove of the bending die 16 of the bending tool 12 (partial views 5 to 7 of FIG. 2). Finally, the bending tool 12 is closed (partial view 8 of Fig. 2) and carried out the next bending operation.

Die Werkzeugantriebsmotoren 23, 24, 25 an der Werkzeugeinheit 4 sowie der Drehantriebsmotor 29 an dem Tragarm 28 sind während der Dreh- bzw. Schwenkbewegung der Werkzeugeinheit 4 mit ihrer Energiequelle verbunden. Zu diesem Zweck verlaufen zwischen dem Gestell 2 und dem Tragarm 28 bzw. der Werkzeugeinheit 4 Energieversorgungsleitungen, die durch den Schwenkträger 31 geführt sind. Tragarmseitig sind an dem Schwenkträger 31 Anschlussklemmen vorgesehen, von welchen aus Abschnitte der Energieversorgungsleitungen zu dem Drehantriebsmotor 29 und zu den Werkzeugantriebsmotoren 23, 24, 25 führen. Die Energieversorgungsleitungen für die Werkzeugantriebsmotoren 23, 24, 25 verlaufen ausgehend von den genannten Anschlussklemmen im Innern von Führungsketten 34, 35 (Fign. 3 bis 5). Derartige Führungsketten sind beispielsweise in DE 43 02 757 C1 im Detail beschrieben.The tool drive motors 23, 24, 25 on the tool unit 4 and the rotary drive motor 29 on the support arm 28 are connected during the pivotal movement of the tool unit 4 with its power source. For this purpose, run between the frame 2 and the support arm 28 and the tool unit 4 power supply lines, which are guided by the pivot support 31. Tragarmseitig 31 terminals are provided on the pivot support, from which lead portions of the power supply lines to the rotary drive motor 29 and the tool drive motors 23, 24, 25. The power supply lines for the tool drive motors 23, 24, 25 extend from the mentioned terminals inside guide chains 34, 35 (Figures 3 to 5). Such guide chains are described for example in DE 43 02 757 C1 in detail.

Die Führungsketten 34, 35 sowie die in deren Innern untergebrachten Energieversorgungsleitungen verlaufen schleifenförmig auf der Außenwand eines von dem Tragarm 28 ausgebildeten Gehäuses 36 für den Drehantriebsmotor 29. Das rohrartige Gehäuse 36 ist gestellseitig mit dem Schwenkträger 31 starr verbunden. An seinem der Werkzeugeinheit 4 zugewandten Ende lagert und führt das Gehäuse 36 den Lagerflansch 30, über welchen die Werkzeugeinheit 4 um die Drehachse 26 drehbar mit dem Schwenkträger 31 verbunden ist. Mit dem Lagerflansch 30 drehbar sind Anschlussklemmen 37, 38, mit denen die Energieversorgungsleitungen der Werkzeugantriebsmotoren 23, 24, 25 an ihrer Antriebsmotorseite versehen sind. Neben den Energieversorgungsleitungen nehmen die Führungsketten 34, 35 auch Steuerleitungen für die Werkzeugantriebsmotoren 23, 24, 25 auf. Auch diese Steuerleitungen sind über die schwenkträgerseitigen Anschlussklemmen und durch das Innere des Schwenkträgers 31 zu dem Gestell 2 der Biegemaschine 1 geführt. Bei der Drehbewegung der Werkzeugeinheit 4 um die Drehachse 26 gleiten die Führungsketten 34, 35 auf dem Gehäuse 36 des Drehantriebsmotors 29. Durch entsprechende Ausrichtung der Schwenkachsen ihrer Kettenglieder hängen die Führungsketten 34, 35 dabei in Schwerkraftrichtung allenfalls geringfügig durch. Sowohl die Länge der Führungsketten 34, 35 als auch die Länge der in diesen geführten Leitungen ist auf den Maximalbetrag der Relativ-Drehbewegung abgestimmt, die von der Werkzeugeinheit 4 gegenüber dem Schwenkträger 31 ausgeführt wird. Eine in Fig. 5 gezeigte Abdeckblende 39 des Tragarms 28 umschließt das Gehäuse 36 des Drehantriebsmotors 29 konzentrisch und definiert gemeinsam mit dem Gehäuse 36 eine Leitungsaufnahme 40 mit ringförmigem Querschnitt.The guide chains 34, 35 as well as the energy supply lines accommodated in their interior run in the form of loops on the outer wall of a housing 36 formed by the support arm 28 for the rotary drive motor 29. The tubular housing 36 is rigidly connected to the pivot support 31 on the frame side. At its end facing the tool unit 4, the housing 36 supports and guides the bearing flange 30, via which the tool unit 4 is rotatably connected to the pivot support 31 about the axis of rotation 26. Rotatable with the bearing flange 30 are terminals 37, 38, with which the power supply lines of the tool drive motors 23, 24, 25 are provided on their drive motor side. In addition to the power supply lines, the guide chains 34, 35 also accommodate control lines for the tool drive motors 23, 24, 25. These control lines are also guided via the pivot carrier side terminals and through the interior of the pivot carrier 31 to the frame 2 of the bending machine 1. During the rotational movement of the tool unit 4 about the axis of rotation 26, the guide chains 34, 35 slide on the housing 36 of the rotary drive motor 29. By appropriate alignment of the pivot axes of their chain links hang the guide chains 34, 35 at most slightly in the direction of gravity. Both the length of the guide chains 34, 35 and the length of the guided in these lines is tuned to the maximum amount of relative rotational movement, which is performed by the tool unit 4 relative to the pivot support 31. A cover panel 39 of the support arm 28 shown in FIG. 5 concentrically encloses the housing 36 of the rotary drive motor 29 and together with the housing 36 defines a cable receptacle 40 with an annular cross-section.

Claims (12)

  1. Bending machine for bending bar-like and/or rod-like workpieces, in particular tubes (5), having a frame (2) and having a tool unit (4) which has at least one bending tool (11, 12) and which is supported at the side of a carrying arm (28) that faces away from the frame (2), the carrying arm (28) extending between the frame (2) and the tool unit (4) parallel with the longitudinal direction (9) of the workpieces to be processed, at least one tool driving motor (23, 24, 25) being provided in order to actuate a bending tool (11, 12) and the tool unit (4) being rotatable relative to the frame (2) by means of at least one rotary driving motor (29) about an axis of rotation (26) which extends parallel with the longitudinal direction (9) of the workpieces to be processed, characterised in that at least one rotary driving motor (29) of the tool unit (4) is/are fitted to the carrying arm (28) and at least one tool driving motor (23, 24, 25) is/are fitted to the tool unit (4), the tool driving motor(s) (23, 24, 25) on the tool unit (4) being rotatable therewith about the axis of rotation (26) thereof relative to the frame (2).
  2. Bending machine according to claim 1, characterised in that the rotatable tool driving motor(s) (23, 24, 25) is/are connected to a power source via at least one power supply conductor which is movably connected to the rotating tool driving motor(s) (23, 24, 25) at the driving motor side thereof and which moves with the driving motor side relative to a conducting member which is located towards the power source when the tool driving motor(s) (23, 24, 25) rotate(s), and in that the power supply conductor has, between the conducting member located towards the power source and the driving motor side thereof, a length which is adapted to the magnitude of the relative movement of the driving motor side relative to the conducting member which is located towards the power source.
  3. Bending machine according to claim 2, characterised in that a conductor guide is provided for the conductor portion between the conducting member which is located towards the power source and the driving motor side of the power supply conductor.
  4. Bending machine according to claim 3, characterised in that the conductor guide is in the form of a guide track (34, 35).
  5. Bending machine according to any one of claims 2 to 4, characterised in that the conductor portion between the conducting member which is located towards the power source and the driving motor side of the power supply conductor, and if applicable also the conductor guide, extend(s) on the carrying arm (28).
  6. Bending machine according to any one of claims 2 to 4, characterised in that the conductor portion between the conducting member which is located towards the power source and the driving motor side of the power supply conductor, and if applicable also the conductor guide, extend(s) in a conductor receiver (39) on the carrying arm (28).
  7. Bending machine according to any one of claims 2 to 5, characterised in that the conductor portion between the conducting member which is located towards the power source and the driving motor side of the power supply conductor extends in a loop-like manner on the carrying arm (28).
  8. Bending machine according to claim 6, characterised in that the conductor receiver (39) on the carrying arm (28) is delimited by a housing (36) of a rotary driving motor (29) of the tool unit (4).
  9. Bending machine according to any one of the preceding claims, characterised in that there is provided for at least one tool driving motor (23, 24, 25), in addition to at least one power supply conductor, at least one further connection conductor, with regard to which the features of patent claims 2 to 8 are provided accordingly.
  10. Bending machine according to any one of the preceding claims, characterised in that at least one rotary driving motor (29) of the tool unit (4) is received inside the carrying arm (28).
  11. Bending machine according to any one of the preceding claims, characterised in that the tool unit (4) can be rotated about the axis of rotation (26) relative to the carrying arm (28).
  12. Bending machine according to any one of the preceding claims, characterised in that the carrying arm (28) is fitted to a pivoting carrier (31) which is itself supported on the frame (2) of the bending machine (1) so as to be rotatable about an axis of rotation (32) of the pivoting' carrier extending parallel with the longitudinal direction (9) of the workpieces to be processed, the axis of rotation (26) of the tool unit (4) and the axis of rotation (32) of the pivoting carrier being offset relative to each other in a direction transverse to said axes of rotation.
EP20020022075 2002-10-02 2002-10-02 Bending machine with rotatable bending head Expired - Lifetime EP1405680B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20020022075 EP1405680B1 (en) 2002-10-02 2002-10-02 Bending machine with rotatable bending head
DE50205694T DE50205694D1 (en) 2002-10-02 2002-10-02 Bending machine with rotating tool unit

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EP20020022075 EP1405680B1 (en) 2002-10-02 2002-10-02 Bending machine with rotatable bending head

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EP1405680A1 EP1405680A1 (en) 2004-04-07
EP1405680B1 true EP1405680B1 (en) 2006-01-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006029749A1 (en) * 2006-06-28 2008-01-03 Chiao Sheng Machinery Co. Ltd. Bending and pressing wheel set arrangement for pipe-bending machine has both lower bending and pressing wheel sets driven by two-sided motor via linear transmission

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009038384A1 (en) * 2009-08-24 2011-03-03 Tracto-Technik Gmbh & Co. Kg Device for bending elongate workpieces
DE102013200850B4 (en) * 2013-01-21 2015-01-22 Wafios Aktiengesellschaft Device for bending strand-shaped workpieces

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH683598A5 (en) * 1990-03-13 1994-04-15 Mewag Maschinenfabrik Ag Tube bending machine.
DE4302757C1 (en) * 1993-02-01 1994-03-17 Igus Gmbh Electrical cable guide unit formed by two types of plastic element - that have linkage connection points that are engaged in snap action operation and allow some movement.
US6192728B1 (en) * 2000-05-30 2001-02-27 Yin Lin Machine Industrial Co., Ltd Pipe bending machine accurately controlling bent angles of pipes
ATE246560T1 (en) * 2001-01-30 2003-08-15 Blm Spa MACHINE FOR BENDING STRONG-SHAPED MATERIAL, SUCH AS TUBES, RODS, PROFILES OR METAL WIRE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006029749A1 (en) * 2006-06-28 2008-01-03 Chiao Sheng Machinery Co. Ltd. Bending and pressing wheel set arrangement for pipe-bending machine has both lower bending and pressing wheel sets driven by two-sided motor via linear transmission
DE102006029749B4 (en) * 2006-06-28 2010-01-28 Chiao Sheng Machinery Co. Ltd. Arrangement of the bending and press wheel sets of a pipe bending machine

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DE50205694D1 (en) 2006-04-13

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