EP2289643B1 - Device for bending elongated workpieces - Google Patents

Device for bending elongated workpieces Download PDF

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Publication number
EP2289643B1
EP2289643B1 EP20100008714 EP10008714A EP2289643B1 EP 2289643 B1 EP2289643 B1 EP 2289643B1 EP 20100008714 EP20100008714 EP 20100008714 EP 10008714 A EP10008714 A EP 10008714A EP 2289643 B1 EP2289643 B1 EP 2289643B1
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EP
European Patent Office
Prior art keywords
bending
drive
rotation
axis
linear
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EP20100008714
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German (de)
French (fr)
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EP2289643A2 (en
EP2289643A3 (en
Inventor
Dirk BÖRGER
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Tracto Technik GmbH and Co KG
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Tracto Technik GmbH and Co KG
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Publication of EP2289643A3 publication Critical patent/EP2289643A3/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 device for bending elongate workpieces, such as pipes, extruded profiles or metal wire.
  • Tube bending machines are known for different applications.
  • different bending methods can be used.
  • press bending the bending tool is pressed manually or hydraulically against two counter rollers. This movement forces the workpiece positioned between the bending tool and the counter-roller (s) to bend about the bending tool. Since the pipes can not be supported from the inside, this method is usually suitable only for thick-walled pipes and large bending radii.
  • Three-roll bending is used to make workpieces with large bending radii. The process is similar to press bending, but the work rolls rotate as well as the two stationary counter rolls and thereby form the bend radius.
  • compression bending the tube is clamped between a sliding carriage and a stationary bending roller.
  • the workpiece is in this case fixed between a stationary bending roller and a clamping arm arranged on a pivoting arm and converted by pivoting the pivoting arm including the clamping piece about the axis of rotation of the bending roller.
  • tube bending it is increasingly important to develop tube bending machines that allow bending successive sections of the tube to be deformed in different ways. For example, it may be provided that a first pipe section with a first bending radius and a first rotation angle is to be bent, while a subsequent pipe section with a second bending radius is to be bent by a second rotation angle. Furthermore, it may be necessary to bend a first tube section to the right “and the tube section following to” to the left. "One possibility for this is to rotate the tube by 180 ° itself after a first bending operation, relative to the bending tool However, this can lead to space problems, since on both sides of the tube bending machine considerable space must be created, in which the already bent part of the tube can extend.
  • the EP 0 200 979 A2 discloses a tube bending machine in which clamping bodies are arranged and moved on the bending template and on the clamping jaw in such a way that a quick change is possible.
  • the jaws are rotatable about a horizontal axis.
  • an outgoing boom is present, on which a fastening element of the clamping body is arranged, which has differently formed clamping surfaces in two different heights.
  • the jaw body is additionally rotatable about a horizontal axis via a hydraulic motor provided with a cantilever articulated to a rod fixed to the axis of the jaw.
  • the hydro-engine is used. The displacement of the altitude of the clamp body via independent of the hydro-engine cylinder, which are actuated by the hydraulic drive.
  • Tube bending machines are therefore known which make it possible to bend a tube with different bending radii as well as to the right and to the left without the tube in this case having to be rotated by 180 ° relative to the bending tool.
  • This pipe bending machine comprises a base frame, on which the unbent portion of a pipe to be bent is fixed. The fixation is such that the tube can be advanced by means of a carriage and rotated by a rotating device about a defined angle about the longitudinal axis of the unbent portion of the tube.
  • the pipe bending machine further comprises a tool carrier with a plurality of bending tools.
  • the tool carrier is via a carrier carriage with connected to the base support, wherein the base support allows a horizontal displacement of the tool carrier relative to the pipe to be bent and thus perpendicular to the longitudinal axis of the unbent portion of the tube.
  • the tool carrier itself is rotatably connected about an axis which is aligned parallel to the longitudinal axis of the unbent portion of the tube, with the support carriage, wherein rotation takes place, if necessary, by means of an electric motor.
  • the bending tools comprise two bending roller units each having two bending rollers of different diameters, wherein the two bending roller units are fixed on opposite sides with respect to the axis of rotation of the tool carrier on a common axis.
  • a major disadvantage with the in the EP 1 226 887 B1 disclosed pipe bending machine is that two separate drives must be provided; one with which the carrier carriage can be moved horizontally linear and another, which can cause the rotation of the tool carrier about the axis of rotation.
  • the present invention seeks to provide an improved device for bending elongated workpieces, in particular with respect to the EP 1 226 887 B1 known pipe bending machine is structurally less expensive.
  • the essence of the invention is to use the drive, which is provided for a relative displacement of the tool carrier to the base support, to cause - at least temporarily - at the same time a rotational movement of the tool carrier about an axis of rotation.
  • An inventive device for bending elongated workpieces has the features of claim 1.
  • linear drive a unit that causes a controlled translation of the tool carrier relative to the base support.
  • the translation may preferably be rectilinear here, but this is not absolutely necessary.
  • a linear drive preferably comprises a linear guide, which connects the tool carrier and the base support with each other in such a way that movement is possible only in the opposite directions defined by the linear guide, and corresponding drive means for carrying out the movement.
  • the transmission is designed such that it has a drive wheel which is connected - directly or indirectly - with a shaft of the tool carrier defining the axis of rotation.
  • the rotational movement of the tool carrier can then be generated by the fact that the drive wheel rolls on a corresponding contact surface during a displacement of the tool carrier by the linear drive.
  • the desired, coupled with the linear motion rotational movement of the tool carrier can be achieved by means of a structurally very simple design gear.
  • the drive wheel may be formed as a gear wheel, which rolls on a rack.
  • a particularly accurate coupling of the rotational movement of the tool carrier to the relative movement of the tool carrier can be effected.
  • a second linear guide over which the tool carrier is displaceable relative to the base support to provide wherein the second linear drive is not aligned parallel to the first linear drive.
  • the second linear drive in conjunction with the first linear drive allows any (two-dimensional) displaceability of the tool carrier in a plane relative to the base support. This not only allows easy positioning of the respective bending tools on the pipe to be bent, but also the arrangement of several bending rollers of different diameters on one side with respect to the axis of rotation of the tool carrier, wherein the positioning of the respective bending roller for contact with the bending tool only due to Displacement of the tool carrier can be done based on the linear drives.
  • a coupling function can be generated, wherein in a first, within the displacement of the second linear drive position, the drive wheel rolls on the contact surface, whereby according to the invention the displacement of the tool carrier means of the linear drive to a simultaneous rotation of the tool carrier leads around the axis of rotation, and in at least one second position, the drive wheel no longer rolls on the contact surface, whereby the coupling of the rotation of the tool carrier to the translation of the first linear drive is canceled.
  • the linear guides of the first and the second linear drive can be aligned perpendicular to each other, so that a defined range of motion can be achieved with the shortest possible displacement of the linear drives.
  • the linear guides of the first and the second linear drive define a displacement plane of the tool carrier, which is aligned perpendicular to the longitudinal axis of the held on the base support (unbent) portion of the workpiece to be bent. This simplifies the exact positioning of the bending tools on the section of the workpiece to be bent.
  • the same purpose is served by the further preferably provided alignment of the axis of rotation of the tool carrier parallel to the longitudinal axis of the held on the base portion of the workpiece.
  • the bending device shown in the figures comprises a base support 1, which is shown schematically in the figures in the form of a cuboid.
  • a drive unit 2 is provided, in which a tube 3 to be bent is fixed.
  • the drive unit 2 comprises an electric motor (not shown) with which the tube 3 to be bent can be rotated about the longitudinal axis of the unbent portion of the tube.
  • the drive unit also comprises a linear drive (not shown), which makes it possible to move it, including the tube 3 to be bent in the direction of the longitudinal axis of the non-bent portion of the tube 3 relative to the base support 1.
  • a tool carrier 4 of the bending device comprises a main body 5, a vertically oriented bending tool axis 6 and a pivot arm 7, which can be pivoted relative to the main body 5 about the bending tool axis 6.
  • a bending roller unit 8 of a bending tool is arranged, each having three sections of different diameters, which serve as a bending template and define the bending radius of the respective bending operation.
  • Each of the bending tools further comprises a clamping jaw 9, which is arranged displaceably on the pivot arm 7 and in a position in which it rests against the respective bending roller unit 8, the tube located therebetween 3 clamped with a defined clamping force.
  • the tool carrier 4 is fixed via a displacement unit 10 on a side surface of the base support 1.
  • the displacement unit 10 comprises two linear drives 11a, 11b, each consisting of a carriage 12a, 12b, two linear guides 13a, 13b and a drive, not shown (eg hydraulic or pneumatic cylinder, electric motor spindle drive, rack and pinion linear drive, etc.).
  • the two parallel rail systems comprehensive linear guides 13a, 13b of the linear actuators 11a, 11b are aligned at an angle of 90 ° to each other, wherein the linear guide 13a of the first linear actuator 11a horizontally and the linear guide 13b of the second linear actuator 11b is vertically aligned.
  • the tool carrier 4 including the associated bending tools in a plane which is aligned perpendicular to the longitudinal axis of the unbent portion of the tube 3, are continuously displaced.
  • the displacement of the tool carrier 4 relative to the base support 1 or to the fixed to the base support 1 tube 3 is allowed to position the bending tool located in the operating position so that the section to be bent of the tube 3 in the desired bending radius corresponding Bending template of the respective bending roller unit 8 is located.
  • the Fig. 1 shows how the section of the tube 3 to be bent between the bending radius of the smallest bending radius forming the located in the operating position bending roller unit 8 and the clamping jaw 9 of this bending tool is fixed.
  • the Fig. 3 to 6 show the process of rotating the tool carrier 4 about its axis of rotation.
  • the rotation of the tool carrier 4 is achieved about the axis of rotation by means of a transmission comprising a gear 14 which rolls on a connected to the base support 1 rack 15.
  • the gearwheel 14 is non-rotatably connected to the main body 5 of the tool carrier 4 via a hollow shaft 16, wherein the hollow shaft 16 extends through a slot in the carriage 12b of the second linear drive 11b and rotatable in a bearing 17 connected to the carriage 12a of the first linear drive 11a is stored.
  • the hollow shaft 16 thus defines the axis of rotation of the tool carrier 4.
  • the second bending tool now in the operating position must still be positioned so that the section of the tube 3 to be bent is positioned in the bending template of the bending roller unit 8 provided for the following bending operation.
  • the tool carrier 4 is initially moved by means of the second linear drive 11b a small amount upwards, whereby it is achieved that the gear 14 no longer meshes with the rack 15.
  • a subsequent displacement of the tool carrier 4 in the horizontal direction to the right by means of the first linear drive 11a consequently no longer leads to a rotation of the tool carrier 4.
  • Fig. 6 shows the achievement of this second operating position already in the Fig. 2 is presented from a different perspective.

Description

Die Erfindung betrifft eine Vorrichtung zum Biegen länglicher Werkstücke, wie beispielsweise Rohre, Strangprofile oder Metalldraht.The invention relates to a device for bending elongate workpieces, such as pipes, extruded profiles or metal wire.

Rohrbiegemaschinen sind für unterschiedliche Anwendungszwecke bekannt. Hierbei können unterschiedliche Biegeverfahren zum Einsatz kommen. Beim so genannten Pressbiegen wird das Biegewerkzeug manuell oder hydraulisch gegen zwei Gegenrollen gepresst. Diese Bewegung zwingt das zwischen dem Biegewerkzeug und der oder den Gegenrollen positionierte Werkstück zur Biegung um das Biegewerkzeug. Da die Rohre nicht von innen gestützt werden können, ist dieses Verfahren in der Regel nur für dickwandige Rohre und große Biegeradien geeignet. Drei-Rollen-Biegen wird angewendet, um Werkstücke mit großen Biegeradien herzustellen. Das Verfahren ist dem Pressbiegen ähnlich, doch rotieren die Arbeitswalzen sowie die beiden stationären Gegenwalzen und formen dadurch den Biegeradius. Beim Kompressionsbiegen ist das Rohr zwischen einem Gleitschlitten und einer stationären Biegerolle geklemmt. Durch eine Rotation des Gleitschlittens um die Biegerolle wird das Rohr auf den Radius der Biegerolle gebogen. Wesentlich vielseitiger und präziser als die zuvor genannten Verfahren ist das Rotationszugbiegen. Das Werkstück wird hierbei zwischen einer stationären Biegerolle und einem an einem Schwenkarm angeordneten Klemmstück fixiert und durch ein Verschwenken des Schwenkarms einschließlich des Klemmstücks um die Rotationsachse der Biegerolle umgeformt.Tube bending machines are known for different applications. In this case, different bending methods can be used. In so-called press bending, the bending tool is pressed manually or hydraulically against two counter rollers. This movement forces the workpiece positioned between the bending tool and the counter-roller (s) to bend about the bending tool. Since the pipes can not be supported from the inside, this method is usually suitable only for thick-walled pipes and large bending radii. Three-roll bending is used to make workpieces with large bending radii. The process is similar to press bending, but the work rolls rotate as well as the two stationary counter rolls and thereby form the bend radius. During compression bending, the tube is clamped between a sliding carriage and a stationary bending roller. By rotating the slide around the bending roller, the tube is bent to the radius of the bending roller. Much more versatile and precise than the aforementioned methods is the Rotationszugbiegen. The workpiece is in this case fixed between a stationary bending roller and a clamping arm arranged on a pivoting arm and converted by pivoting the pivoting arm including the clamping piece about the axis of rotation of the bending roller.

Für das Rohrbiegen kommt es zunehmend darauf an, Rohrbiegemaschinen zu entwickeln, die es erlauben, aufeinanderfolgende Abschnitte des zu verformenden Rohrs in unterschiedlicher Weise zu biegen. So kann beispielsweise vorgesehen sein, dass ein erster Rohrabschnitt mit einem ersten Biegeradius und um einen ersten Rotationswinkel gebogen werden soll, während ein nachfolgender Rohrabschnitt mit einem zweiten Biegeradius um einen zweiten Rotationswinkel zu biegen ist. Weiterhin kann es erforderlich sein, dass ein erster Rohrabschnitt nach rechts" und der danach folgende Rohrabschnitt "nach links" gebogen werden soll. Eine Möglichkeit hierzu besteht darin, das Rohr nach einem ersten Biegevorgang selbst relativ zu dem Biegewerkzeug um 180° zu verdrehen, so dass dieses in einem darauffolgenden Biegevorgang in entgegengesetzter Richtung gebogen wird. Hierdurch können sich jedoch Platzprobleme ergeben, da auf beiden Seite der Rohrbiegemaschine erhebliche Freiräume geschaffen werden müssen, in die sich der bereits gebogene Teil des Rohrs erstrecken kann.For tube bending, it is increasingly important to develop tube bending machines that allow bending successive sections of the tube to be deformed in different ways. For example, it may be provided that a first pipe section with a first bending radius and a first rotation angle is to be bent, while a subsequent pipe section with a second bending radius is to be bent by a second rotation angle. Furthermore, it may be necessary to bend a first tube section to the right "and the tube section following to" to the left. "One possibility for this is to rotate the tube by 180 ° itself after a first bending operation, relative to the bending tool However, this can lead to space problems, since on both sides of the tube bending machine considerable space must be created, in which the already bent part of the tube can extend.

Die EP 0 200 979 A2 offenbart eine Rohrbiegemaschine, bei der Klemmkörper an der Biegeschablone und an der Spannbacke in der Weise angeordnet und bewegt werden, dass ein schneller Wechsel möglich ist. Die Spannbacken sind um eine horizontale Achse drehbar. Am oberen Ende einer Kolbenstange ist ein abgehender Ausleger vorhanden, an dem über ein Befestigungselement der Klemmkörper angeordnet ist, der in zwei verschiedenen Höhenlagen unterschiedlich ausgebildete Klemmflächen aufweist. Ferner ist der Klemmbackenkörper zusätzlich um eine horizontale Achse drehbar, und zwar über einen Hydro-Motor, der mit einem Ausleger versehen ist, der an eine Stange angelenkt ist, die an der Achse der Spannbacke befestigt ist. Um die Drehbewegung durchzuführen wird demnach der Hydro-Motor verwendet. Die Verschiebung der Höhenlage der Klemmkörper erfolgt über vom Hydro-Motor unabhängige Zylinder, die vom hydraulischen Antrieb betätigt werden.The EP 0 200 979 A2 discloses a tube bending machine in which clamping bodies are arranged and moved on the bending template and on the clamping jaw in such a way that a quick change is possible. The jaws are rotatable about a horizontal axis. At the upper end of a piston rod an outgoing boom is present, on which a fastening element of the clamping body is arranged, which has differently formed clamping surfaces in two different heights. Further, the jaw body is additionally rotatable about a horizontal axis via a hydraulic motor provided with a cantilever articulated to a rod fixed to the axis of the jaw. In order to perform the rotational movement, therefore, the hydro-engine is used. The displacement of the altitude of the clamp body via independent of the hydro-engine cylinder, which are actuated by the hydraulic drive.

Aus der EP 1 226 887 B1 und aus der EP 1405680 A1 sind daher Rohrbiegemaschinen bekannt, die es ermöglichen, ein Rohr mit unterschiedlichen Biegeradien sowie nach rechts und nach links zu biegen, ohne dass hierbei das Rohr um 180° relativ zu dem Biegewerkzeug gedreht werden müsste. Diese Rohrbiegemaschine umfasst ein Grundgestell, auf dem der ungebogene Abschnitt eines zu biegenden Rohrs fixiert ist. Die Fixierung ist derart, dass das Rohr mittels eines Schlittens vorgeschoben und mittels einer Dreheinrichtung um einen definierten Winkel um die Längsachse des ungebogenen Abschnitts des Rohrs rotiert werden kann. Die Rohrbiegemaschine umfasst weiterhin einen Werkzeugträger mit mehreren Biegewerkzeugen. Der Werkzeugträger ist über einen Trägerschlitten mit dem Grundträger verbunden, wobei der Grundträger eine horizontale Verschiebung des Werkzeugträgers relativ zu dem zu biegenden Rohr und folglich senkrecht zu der Längsachse des ungebogenen Abschnitts des Rohrs ermöglicht. Der Werkzeugträger selbst ist drehbar um eine Achse, die parallel zu der Längsachse des ungebogenen Abschnitts des Rohrs ausgerichtet ist, mit dem Trägerschlitten verbunden, wobei eine Drehung bedarfsweise anhand eines Elektromotors erfolgt. Die Biegewerkzeuge umfassen zwei Biegerolleneinheiten mit jeweils zwei Biegerollen unterschiedlichen Durchmessers, wobei die zwei Biegerolleneinheiten auf gegenüberliegenden Seiten bezogen auf die Rotationsachse des Werkzeugträgers auf einer gemeinsamen Achse fixiert sind. Durch eine kombinierte Drehbewegung des Werkzeugträgers um die Rotationsachse und eine Horizontalverschiebung des Werkzeugträgers mittels des Trägerschlittens kann eine der vier Biegerollen mit dem zu biegenden Abschnitt des Rohrs in Kontakt gebracht werden. Daraufhin werden die an dem Schwenkarm angeordneten Spannbacken und Gleitschienen an das Rohr zwischen der jeweiligen Spannbacke und der Biegerolle herangefahren und das Rohr dadurch zwischen der Spannbacke und der Biegerolle fixiert, so dass bei einem Verschwenken des Schwenkarms der entsprechende Abschnitt des Rohrs um die Biegerolle herumgebogen wird. Der konkret in der EP 1 226 887 B1 offenbarte Aufbau einer Rohrbiegemaschine ermöglicht somit ein Biegen nach rechts und ein Biegen nach links, jeweils mit zwei unterschiedlichen Biegeradien.From the EP 1 226 887 B1 and from the EP 1405680 A1 Tube bending machines are therefore known which make it possible to bend a tube with different bending radii as well as to the right and to the left without the tube in this case having to be rotated by 180 ° relative to the bending tool. This pipe bending machine comprises a base frame, on which the unbent portion of a pipe to be bent is fixed. The fixation is such that the tube can be advanced by means of a carriage and rotated by a rotating device about a defined angle about the longitudinal axis of the unbent portion of the tube. The pipe bending machine further comprises a tool carrier with a plurality of bending tools. The tool carrier is via a carrier carriage with connected to the base support, wherein the base support allows a horizontal displacement of the tool carrier relative to the pipe to be bent and thus perpendicular to the longitudinal axis of the unbent portion of the tube. The tool carrier itself is rotatably connected about an axis which is aligned parallel to the longitudinal axis of the unbent portion of the tube, with the support carriage, wherein rotation takes place, if necessary, by means of an electric motor. The bending tools comprise two bending roller units each having two bending rollers of different diameters, wherein the two bending roller units are fixed on opposite sides with respect to the axis of rotation of the tool carrier on a common axis. By a combined rotational movement of the tool carrier about the axis of rotation and a horizontal displacement of the tool carrier by means of the carrier carriage, one of the four bending rollers can be brought into contact with the section of the tube to be bent. Then arranged on the pivot arm clamping jaws and slides are moved up to the pipe between the respective clamping jaw and the bending roller and thereby fixed the tube between the jaw and the bending roller, so that upon pivoting of the pivot arm of the corresponding portion of the tube is bent around the bending roller , The concrete in the EP 1 226 887 B1 Thus disclosed construction of a pipe bending machine thus allows Bend to the right and one bend to the left, each with two different bending radii.

Ein wesentlicher Nachteil, der mit der in der EP 1 226 887 B1 offenbarten Rohrbiegemaschine verbunden ist, liegt darin, dass zwei separate Antriebe vorgesehen sein müssen; einer, mit denen der Trägerschlitten horizontal linear verfahren werden kann und ein anderer, der die Drehung des Werkzeugträgers um die Rotationsachse bewirken kann.A major disadvantage with the in the EP 1 226 887 B1 disclosed pipe bending machine is that two separate drives must be provided; one with which the carrier carriage can be moved horizontally linear and another, which can cause the rotation of the tool carrier about the axis of rotation.

Ausgehend von diesem Stand der Technik lag der Erfindung die Aufgabe zugrunde, eine verbesserte Vorrichtung zum Biegen von länglichen Werkstücken anzugeben, die insbesondere gegenüber der aus der EP 1 226 887 B1 bekannten Rohrbiegemaschine konstruktiv weniger aufwendig ist.Based on this prior art, the present invention seeks to provide an improved device for bending elongated workpieces, in particular with respect to the EP 1 226 887 B1 known pipe bending machine is structurally less expensive.

Diese Aufgabe wird durch den Gegenstand des unabhängigen Patentanspruchs gelöst. Vorteilhafte Ausführungsformen der erfindungsgemäßen Biegevorrichtung sind Gegenstand der abhängigen Patentansprüche und ergeben sich aus der nachfolgenden Beschreibung der Erfindung.This object is solved by the subject matter of the independent claim. Advantageous embodiments of the bending device according to the invention are the subject of the dependent claims and will become apparent from the following description of the invention.

Der Kern der Erfindung liegt darin, den Antrieb, der für eine Relativverschiebung des Werkzeugträgers zu dem Grundträger vorgesehen ist, zu benutzen, um - zumindest temporär - gleichzeitig auch eine Drehbewegung des Werkzeugträgers um eine Rotationsachse zu bewirken. Dadurch wird ermöglicht, auf einen weiteren Motor zu verzichten, wodurch die gesamte Vorrichtung konstruktiv einfach ausgebildet und somit kostengünstig hergestellt werden kann.The essence of the invention is to use the drive, which is provided for a relative displacement of the tool carrier to the base support, to cause - at least temporarily - at the same time a rotational movement of the tool carrier about an axis of rotation. This makes it possible to dispense with a further motor, whereby the entire device can be structurally simple and thus manufactured inexpensively.

Eine erfindungsgemäße Vorrichtung zum Biegen länglicher Werkstücke weist die Merkmale des Anspruchs 1 auf.An inventive device for bending elongated workpieces has the features of claim 1.

In einer bevorzugten Ausführungsform ist vorgesehen, die Relativbewegung des Werkzeugträgers zu dem Grundträger mittels mindestens eines Linearantriebs zu bewirken, was eine konstruktiv einfache Lösung darstellt.In a preferred embodiment, it is provided to effect the relative movement of the tool carrier to the base carrier by means of at least one linear drive, which is a structurally simple solution.

Unter "Linearantrieb" wird erfindungsgemäß eine Einheit verstanden, die eine gesteuerte Translation des Werkzeugträgers relativ zu dem Grundträger bewirkt. Die Translation kann hierbei vorzugsweise geradlinig sein, was jedoch nicht zwingend erforderlich ist. Ein Linearantrieb umfasst vorzugsweise eine Linearführung, die den Werkzeugträger und den Grundträger derart miteinander verbindet, dass eine Bewegung lediglich in die durch die Linearführung definierten, entgegengesetzten Richtungen möglich ist, sowie entsprechende Antriebsmittel zur Durchführung der Bewegung.Under "linear drive" is understood according to the invention a unit that causes a controlled translation of the tool carrier relative to the base support. The translation may preferably be rectilinear here, but this is not absolutely necessary. A linear drive preferably comprises a linear guide, which connects the tool carrier and the base support with each other in such a way that movement is possible only in the opposite directions defined by the linear guide, and corresponding drive means for carrying out the movement.

In einer bevorzugten Ausführungsform der vorliegenden Erfindung ist das Getriebe so ausgebildet, dass dieses ein Antriebsrad aufweist, das - direkt oder indirekt - mit einer die Rotationsachse definierenden Welle des Werkzeugträgers verbunden ist. Die Rotationsbewegung des Werkzeugträgers kann dann dadurch erzeugt werden, dass das Antriebsrad bei einer Verschiebung des Werkzeugträgers durch den Linearantrieb an einer entsprechenden Kontaktfläche abrollt. Auf diese Weise kann anhand eines konstruktiv sehr einfach aufgebauten Getriebes die gewünschte, mit der Linearbewegung gekoppelte Rotationsbewegung des Werkzeugträgers erreicht werden.In a preferred embodiment of the present invention, the transmission is designed such that it has a drive wheel which is connected - directly or indirectly - with a shaft of the tool carrier defining the axis of rotation. The rotational movement of the tool carrier can then be generated by the fact that the drive wheel rolls on a corresponding contact surface during a displacement of the tool carrier by the linear drive. In this way, the desired, coupled with the linear motion rotational movement of the tool carrier can be achieved by means of a structurally very simple design gear.

In einer bevorzugten Ausführungsform kann das Antriebsrad als Zahnrad ausgebildet sein, das auf einer Zahnstange abrollt. Durch das formschlüssige Eingreifen des Zahnrads in die Zahnstange kann eine besonders genaue Kopplung der Rotationsbewegung des Werkzeugträgers an die Relativbewegung des Werkzeugträgers bewirkt werden. Selbstverständlich ist es jedoch auch möglich, das Abrollen des Antriebsrads auf der entsprechenden Kontaktfläche reibschlüssig zu bewirken.In a preferred embodiment, the drive wheel may be formed as a gear wheel, which rolls on a rack. By the positive engagement of the gear in the rack, a particularly accurate coupling of the rotational movement of the tool carrier to the relative movement of the tool carrier can be effected. Of course, it is also possible to effect the rolling of the drive wheel on the corresponding contact surface frictionally.

In einer weiterhin bevorzugten Ausführungsform der erfindungsgemäßen Biegevorrichtung kann vorgesehen sein, neben der ersten eine zweite Linearführung, über die der Werkzeugträger relativ zu dem Grundträger verschiebbar ist, vorzusehen, wobei der zweite Linearantrieb nicht-parallel zu dem ersten Linearantrieb ausgerichtet ist. Der zweite Linearantrieb in Verbindung mit dem ersten Linearantrieb ermöglicht eine beliebige (zweidimensionale) Verschiebbarkeit des Werkzeugträgers in einer Ebene relativ zu dem Grundträger. Dies ermöglicht nicht nur eine einfache Positionierung der jeweiligen Biegewerkzeuge an dem zu biegenden Rohr, sondern auch die Anordnung von mehreren Biegerollen unterschiedlichen Durchmessers auf jeweils einer Seite bezüglich der Rotationsachse des Werkzeugträgers, wobei die Positionierung der jeweilige Biegerolle für einen Kontakt mit dem Biegewerkzeug lediglich aufgrund der Verschiebung des Werkzeugträgers anhand der Linearantriebe erfolgen kann. Weiterhin kann durch das Anordnen eines zweiten Linearantriebs und durch ein Verfahren des Werkzeugträgers entlang dieses zweiten Linearantriebs eine Kupplungsfunktion generiert werden, wobei in einer ersten, innerhalb des Verschiebewegs des zweiten Linearantriebs liegenden Position das Antriebsrad auf der Kontaktfläche abrollt, wodurch erfindungsgemäß die Verschiebung des Werkzeugträgers mittels des Linearantriebs zu einer gleichzeitigen Rotation des Werkzeugträgers um die Rotationsachse führt, und in mindestens einer zweiten Position das Antriebsrad nicht mehr auf der Kontaktfläche anrollt, wodurch die Kopplung der Rotation des Werkzeugträgers an die Translation des ersten Linearantriebs aufgehoben ist. Bei dieser Ausgestaltung ist es somit möglich, den Werkzeugträger bedarfsweise mittels des ersten Linearantriebs zu verschieben, ohne dass gleichzeitig eine Rotation des Werkzeugsträgers um die Rotationsachse generiert wird. Dies ist insbesondere vorteilhaft, da regelmäßig vorgesehen sein kann, eine Rotation des Werkzeugträgers um die Rotationsachse lediglich dann zu bewirken, wenn eine Änderung der Biegerichtung von links nach rechts oder anders herum gewünscht ist. Sollen hingegen beispielsweise lediglich die einzelnen, unterschiedliche Durchmesser aufweisenden Biegerollen einer Biegerolleneinheit bedarfsweise mit dem zu biegenden Rohr in Kontakt gebracht werden, so kann dies anhand der zwei Linearantriebe erfolgen, ohne dass hiermit eine Drehung des Werkzeugträgers um die Rotationsachse verbunden wäre.In a further preferred embodiment of the bending device according to the invention can be provided, in addition to the first a second linear guide over which the tool carrier is displaceable relative to the base support to provide, wherein the second linear drive is not aligned parallel to the first linear drive. The second linear drive in conjunction with the first linear drive allows any (two-dimensional) displaceability of the tool carrier in a plane relative to the base support. This not only allows easy positioning of the respective bending tools on the pipe to be bent, but also the arrangement of several bending rollers of different diameters on one side with respect to the axis of rotation of the tool carrier, wherein the positioning of the respective bending roller for contact with the bending tool only due to Displacement of the tool carrier can be done based on the linear drives. Furthermore, by arranging a second linear drive and by a method of the tool carrier along this second linear drive, a coupling function can be generated, wherein in a first, within the displacement of the second linear drive position, the drive wheel rolls on the contact surface, whereby according to the invention the displacement of the tool carrier means of the linear drive to a simultaneous rotation of the tool carrier leads around the axis of rotation, and in at least one second position, the drive wheel no longer rolls on the contact surface, whereby the coupling of the rotation of the tool carrier to the translation of the first linear drive is canceled. In this embodiment, it is thus possible to move the tool carrier, if necessary, by means of the first linear drive, without at the same time a rotation of the tool carrier is generated about the axis of rotation. This is particularly advantageous because it can be regularly provided to effect a rotation of the tool carrier about the axis of rotation only when a change in the bending direction from left to right or the other way around is desired. If, on the other hand, for example, only the individual, different diameter bending rolls of a bending roll unit are brought into contact with the pipe to be bent as required, this can be done on the basis of the two linear drives, without any rotation of the tool carrier being connected about the rotation axis.

Vorteilhafterweise können die Linearführungen des ersten und des zweiten Linearantriebs senkrecht zueinander ausgerichtet sein, so dass ein definierter Bewegungsbereich mit möglichst kurzen Verschiebewegen der Linearantriebe erreicht werden kann.Advantageously, the linear guides of the first and the second linear drive can be aligned perpendicular to each other, so that a defined range of motion can be achieved with the shortest possible displacement of the linear drives.

Weiterhin kann vorgesehen sein, dass die Linearführungen des ersten und des zweiten Linearantriebs eine Verschiebeebene des Werkzeugträgers definieren, die senkrecht zu der Längsachse des an dem Grundträger gehaltenen (ungebogenen) Abschnitts des zu biegenden Werkstücks ausgerichtet ist. Dies vereinfacht die exakte Positionierung der Biegewerkzeuge an dem zu biegenden Abschnitt des Werkstücks.Furthermore, it can be provided that the linear guides of the first and the second linear drive define a displacement plane of the tool carrier, which is aligned perpendicular to the longitudinal axis of the held on the base support (unbent) portion of the workpiece to be bent. This simplifies the exact positioning of the bending tools on the section of the workpiece to be bent.

Dem gleichen Zweck dient die weiterhin vorzugsweise vorgesehene Ausrichtung der Rotationsachse des Werkzeugträgers parallel zu der Längsachse des an dem Grundträger gehaltenen Abschnitts des Werkstücks.The same purpose is served by the further preferably provided alignment of the axis of rotation of the tool carrier parallel to the longitudinal axis of the held on the base portion of the workpiece.

Die Erfindung wird nachfolgend anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert.The invention will be explained in more detail with reference to an embodiment shown in the drawings.

In den Zeichnungen zeigt:

Fig. 1
in einer schematischen, isometrischen Darstellung eine erfindungsge- mäßen Biegevorrichtung in einer ersten Betriebsstellung;
Fig. 2
die Biegevorrichtung der Fig. 1 in einer zweiten Betriebsstellung; und
Fig. 3 bis Fig. 6
verschiedene Positionen bei der Überführung der Biegevorrichtung der Fig. 1 und der Fig. 2 von der ersten in die zweite Betriebsstellung.
In the drawings shows:
Fig. 1
in a schematic, isometric view of a bending device according to the invention in a first operating position;
Fig. 2
the bending device of Fig. 1 in a second operating position; and
Fig. 3 to Fig. 6
various positions in the transfer of the bending device of Fig. 1 and the Fig. 2 from the first to the second operating position.

Die in den Figuren dargestellte Biegevorrichtung umfasst einen Grundträger 1, der in den Figuren schematisch in Form eines Quaders dargestellt ist. Auf der Oberseite des Grundträgers 1 ist eine Antriebseinheit 2 vorgesehen, in der ein zu biegendes Rohr 3 fixiert ist. Die Antriebseinheit 2 umfasst einen Elektromotor (nicht dargestellt), mit dem das zu biegende Rohr 3 um die Längsachse des nicht gebogenen Abschnitts des Rohrs gedreht werden kann. Die Antriebseinheit umfasst zudem einen Linearantrieb (nicht dargestellt), der es ermöglicht, diese einschließlich des zu biegenden Rohrs 3 in Richtung der Längsachse des nicht gebogenen Abschnitts des Rohrs 3 relativ zu dem Grundträger 1 zu verschieben.The bending device shown in the figures comprises a base support 1, which is shown schematically in the figures in the form of a cuboid. On the upper side of the base support 1, a drive unit 2 is provided, in which a tube 3 to be bent is fixed. The drive unit 2 comprises an electric motor (not shown) with which the tube 3 to be bent can be rotated about the longitudinal axis of the unbent portion of the tube. The drive unit also comprises a linear drive (not shown), which makes it possible to move it, including the tube 3 to be bent in the direction of the longitudinal axis of the non-bent portion of the tube 3 relative to the base support 1.

Ein Werkzeugträger 4 der erfindungsgemäßen Biegevorrichtung umfasst einen Grundkörper 5, eine vertikal ausgerichtete Biegewerkzeugachse 6 sowie einen Schwenkarm 7, der relativ zu dem Grundkörper 5 um die Biegewerkzeugachse 6 verschwenkt werden kann. Auf gegenüberliegenden Seiten bezüglich des Grundkörpers 5 ist jeweils eine Biegerolleneinheit 8 eines Biegewerkzeugs angeordnet, die jeweils drei Abschnitte unterschiedlichen Durchmessers aufweist, die als Biegeschablone dienen und den Biegeradius des jeweiligen Biegevorgangs definieren. Jedes der Biegewerkzeuge umfasst weiterhin eine Spannbacke 9, die auf dem Schwenkarm 7 verschiebbar angeordnet ist und in einer Position, in der diese an der jeweiligen Biegerolleneinheit 8 anliegt, das dazwischen befindliche Rohr 3 mit einer definierten Spannkraft klemmt.A tool carrier 4 of the bending device according to the invention comprises a main body 5, a vertically oriented bending tool axis 6 and a pivot arm 7, which can be pivoted relative to the main body 5 about the bending tool axis 6. On opposite sides with respect to the main body 5, a bending roller unit 8 of a bending tool is arranged, each having three sections of different diameters, which serve as a bending template and define the bending radius of the respective bending operation. Each of the bending tools further comprises a clamping jaw 9, which is arranged displaceably on the pivot arm 7 and in a position in which it rests against the respective bending roller unit 8, the tube located therebetween 3 clamped with a defined clamping force.

Der Werkzeugträger 4 ist über eine Verschiebeeinheit 10 an einer Seitenfläche des Grundträgers 1 fixiert. Die Verschiebeeinheit 10 umfasst zwei Linearantriebe 11a, 11b, die jeweils aus einem Schlitten 12a, 12b, zwei Linearführungen 13a, 13b sowie einem nicht dargestellten Antrieb (z.B. hydraulischer oder pneumatischer Zylinder, elektromotorischer Spindelantrieb, Zahnstangen-Zahnrad-Linearantrieb, etc.) bestehen. Die jeweils zwei parallele Schienensysteme umfassenden Linearführungen 13a, 13b der Linearantriebe 11a, 11b sind in einem Winkel von 90° zueinander ausgerichtet, wobei die Linearführung 13a des ersten Linearantriebs 11a horizontal und die Linearführung 13b des zweiten Linearantriebs 11b vertikal ausgerichtet ist. Mittels der Verschiebeeinheit 10 kann der Werkzeugträger 4 einschließlich der damit verbundenen Biegewerkzeuge in einer Ebene, die senkrecht zu der Längsachse des ungebogenen Abschnitts des Rohrs 3 ausgerichtet ist, stufenlos verschoben werden. Durch die Verschiebung des Werkzeugträgers 4 relativ zu dem Grundträger 1 beziehungsweise zu dem auf dem Grundträger 1 fixierten Rohr 3 wird ermöglicht, das sich in der Betriebsposition befindliche Biegewerkzeug so zu positionieren, dass sich der zu biegende Abschnitt des Rohrs 3 in der dem gewünschten Biegeradius entsprechenden Biegeschablone der jeweiligen Biegerolleneinheit 8 befindet.The tool carrier 4 is fixed via a displacement unit 10 on a side surface of the base support 1. The displacement unit 10 comprises two linear drives 11a, 11b, each consisting of a carriage 12a, 12b, two linear guides 13a, 13b and a drive, not shown (eg hydraulic or pneumatic cylinder, electric motor spindle drive, rack and pinion linear drive, etc.). The two parallel rail systems comprehensive linear guides 13a, 13b of the linear actuators 11a, 11b are aligned at an angle of 90 ° to each other, wherein the linear guide 13a of the first linear actuator 11a horizontally and the linear guide 13b of the second linear actuator 11b is vertically aligned. By means of the displacement unit 10, the tool carrier 4, including the associated bending tools in a plane which is aligned perpendicular to the longitudinal axis of the unbent portion of the tube 3, are continuously displaced. By the displacement of the tool carrier 4 relative to the base support 1 or to the fixed to the base support 1 tube 3 is allowed to position the bending tool located in the operating position so that the section to be bent of the tube 3 in the desired bending radius corresponding Bending template of the respective bending roller unit 8 is located.

Die Fig. 1 zeigt, wie der zu biegenden Abschnitt des Rohrs 3 zwischen der den kleinsten Biegeradius ausbildenden Biegeschablone der sich in der Betriebsposition befindlichen Biegerolleneinheit 8 und der Spannbacke 9 dieses Biegewerkzeugs fixiert ist. Durch ein gesteuertes Verschwenken des Schwenkarms 7 des Werkzeugträgers 4 sowie der damit verbundenen Biegewerkzeuge um die gemeinsame Rotationsachse der beiden Biegewerkzeuge (die Biegewerkzeugachse 6) mittels eines nicht dargestellten Antriebs wird das Rohr 3 über einen definierten Winkel um die Biegeschablone der sich in der Betriebsposition befindlichen Biegerolleneinheit 8 herumgebogen. Durch das Verschwenken des in der Grundstellung seitlich ausgerichteten Schwenkarms 7 in Richtung nach vorne wird bei dem sich in der Betriebsposition befindlichen Biegewerkzeug eine Biegung nach rechts erzeugt.The Fig. 1 shows how the section of the tube 3 to be bent between the bending radius of the smallest bending radius forming the located in the operating position bending roller unit 8 and the clamping jaw 9 of this bending tool is fixed. By a controlled pivoting of the pivot arm 7 of the tool carrier 4 and the associated bending tools about the common axis of rotation of the two bending tools (the bending tool axis 6) by means of a drive, not shown, the tube 3 over a defined angle to the bending template of the located in the operating position bending roller unit 8 bent around. By pivoting the laterally oriented in the basic position of the swivel arm 7 in the forward direction, a bending is generated to the right in the bending position in the operating position.

Nachdem eine oder mehrere Biegungen nach rechts durchgeführt wurden, die gegebenenfalls unterschiedliche Biegewinkel und/oder unterschiedliche Biegeradien aufweisen, wird durch eine Drehung des Werkzeugträgers 4 um 180° um eine Rotationsachse, die parallel zu der Längsachse des ungebogenen Abschnitts des Rohrs 3 ausgerichtet ist, das vormals in der Betriebsposition befindliche Biegewerkzeug in eine Parkposition gebracht und das vormals in der Parkposition befindliche Biegewerkzeug entsprechend in die Betriebsposition überführt. Eine solche zweite Betriebsstellung der erfindungsgemäßen Biegevorrichtung ist in der Fig. 2 dargestellt. Darin ist der zu biegenden Abschnitt des Rohrs 3 zwischen der Biegeschablone mit dem größten Biegeradius sowie der entsprechenden Spannbacke 9 des zweiten Biegewerkzeugs dargestellt. Ein Verschwenken des Schwenkarms 7 einschließlich der damit verbundenen Spannbacken 9 um die Biegewerkzeugachse 6 führt zu einer Biegung des Rohrs 3 nach links.After one or more bends have been performed to the right, which may have different bending angles and / or different bending radii, by a rotation of the tool carrier 4 by 180 ° about an axis of rotation, which is aligned parallel to the longitudinal axis of the unbent portion of the tube 3, the previously located in the operating position bending tool placed in a parking position and transferred the former located in the parking position bending tool according to the operating position. Such a second operating position of the bending device according to the invention is in the Fig. 2 shown. Therein, the section of the pipe 3 to be bent between the bending template with the largest bending radius and the corresponding clamping jaw 9 of the second bending tool is shown. A pivoting of the pivot arm 7 including the associated clamping jaws 9 to the bending tool axis 6 leads to a bend of the tube 3 to the left.

Die Fig. 3 bis 6 zeigen den Prozess des Rotierens des Werkzeugträgers 4 um dessen Rotationsachse. Wie aus diesen Figuren gut erkennbar ist, wird die Drehung des Werkzeugträgers 4 um die Rotationsachse mittels eines Getriebes erreicht, das ein Zahnrad 14 umfasst, das auf einer mit dem Grundträger 1 verbundenen Zahnstange 15 abrollt. Das Zahnrad 14 ist über eine Hohlwelle 16 drehfest mit dem Grundkörper 5 des Werkzeugträgers 4 verbunden, wobei die Hohlwelle 16 sich durch ein Langloch in dem Schlitten 12b des zweiten Linearantriebs 11b erstreckt und drehbar in einer mit dem Schlitten 12a des ersten Linearantriebs 11a verbundenen Lagerung 17 gelagert ist. Die Hohlwelle 16 definiert demnach die Rotationsachse des Werkzeugträgers 4. Ein Verschieben des ersten Linearantriebs 11a entlang der horizontal ausgerichteten Linearführung 13a bewirkt eine entsprechende Verschiebung der Hohlwelle 16 innerhalb des Langlochs des Schlittens 12b des zweiten Linearantriebs 11b. Da hierbei das mit der Hohlwelle 16 verbundene Zahnrad 14 auf der Zahnstange 15 abrollt, wird die Hohlwelle 16 in eine Drehung versetzt, die diese auf den Werkzeugträger 4 überträgt.The Fig. 3 to 6 show the process of rotating the tool carrier 4 about its axis of rotation. As can be clearly seen from these figures, the rotation of the tool carrier 4 is achieved about the axis of rotation by means of a transmission comprising a gear 14 which rolls on a connected to the base support 1 rack 15. The gearwheel 14 is non-rotatably connected to the main body 5 of the tool carrier 4 via a hollow shaft 16, wherein the hollow shaft 16 extends through a slot in the carriage 12b of the second linear drive 11b and rotatable in a bearing 17 connected to the carriage 12a of the first linear drive 11a is stored. The hollow shaft 16 thus defines the axis of rotation of the tool carrier 4. Moving the first linear drive 11a along the horizontally oriented linear guide 13a causes a corresponding displacement of the hollow shaft 16 within the slot 12b of the second linear actuator 11b. Since in this case the connected to the hollow shaft 16 gear 14 rolls on the rack 15, the hollow shaft 16 is set in a rotation, which transmits them to the tool carrier 4.

Konkret ist in der Fig. 3 eine Position dargestellt, bei der das zu biegende Rohr 3 nicht mehr in dem oberen Biegewerkzeug positioniert ist und die sich ergibt, nachdem der Werkzeugträger 4 mittels des zweiten Linearantriebs 11b nach unten verschoben wurde. Die Verschiebung nach unten erfolgt so weit, dass das Zahnrad 14 in die Zahnstange 15 eingreift. Daraufhin erfolgt ein Verschieben mittels des ersten Linearantriebs 11a nach links, wie es in der Fig. 4 dargestellt ist. Dieses Verschieben bewirkt die bereits beschriebene Rotation des Werkzeugträgers 4. In der Fig. 5 ist dargestellt, wie die Hohlwelle 16 in dem Langloch des Schlittens 12b des zweiten Linearantriebs 11b das (im Vergleich zur Position gemäß Fig. 4) gegenüberliegende Ende erreicht hat. Die Verschiebung der Hohlwelle 16 zwischen den beiden Enden des Langlochs entspricht einer Drehung des Werkzeugträgers 4 um 180°. Dadurch wurde das vormals in der Parkposition befindliche zweite Biegewerkzeug in seine Betriebsposition bewegt.Is concrete in the Fig. 3 a position is shown in which the pipe 3 to be bent is no longer positioned in the upper bending tool and which results after the tool carrier 4 has been moved by the second linear actuator 11b down. The downward shift takes place so far that the gear 14 engages in the rack 15. This is followed by a displacement by means of the first linear drive 11a to the left, as shown in the Fig. 4 is shown. This displacement causes the already described rotation of the tool carrier 4th In the Fig. 5 is shown as the hollow shaft 16 in the slot of the carriage 12 b of the second linear actuator 11 b (in comparison to the position according to FIG Fig. 4 ) has reached the opposite end. The displacement of the hollow shaft 16 between the two ends of the slot corresponds to a rotation of the tool carrier 4 by 180 °. As a result, the second bending tool previously located in the parking position has been moved to its operating position.

In einem letzten Schritt muss das nunmehr in der Betriebsposition befindliche zweite Biegewerkzeug noch so positioniert werden, dass der zu biegende Abschnitt des Rohrs 3 in der für den folgenden Biegevorgang vorgesehenen Biegeschablone der Biegerolleneinheit 8 positioniert ist. Hierzu wird der Werkzeugträger 4 mittels des zweiten Linearantriebs 11b zunächst einen geringen Betrag nach oben bewegt, wodurch erreicht wird, dass das Zahnrad 14 nicht mehr mit der Zahnstange 15 kämmt. Eine daraufhin erfolgende Verschiebung des Werkzeugträgers 4 in horizontaler Richtung nach rechts mittels des ersten Linearantriebs 11a führt folglich nicht mehr zu einer Rotation des Werkzeugträgers 4. Somit ist es möglich, den zu biegenden Abschnitt des Rohrs 3 in dem Biegewerkzeug zu positionieren, wozu der Werkzeugträger 4 lediglich mittels der zwei Linearantriebe 11a, 11b weiter verschoben werden muss, ohne dass damit eine ungewollte Rotation des Werkzeugträgers 4 verbunden wäre. Die Fig. 6 zeigt das Erreichen dieser zweiten Betriebsstellung, die bereits in der Fig. 2 aus einer anderen Perspektive dargestellt ist.In a last step, the second bending tool now in the operating position must still be positioned so that the section of the tube 3 to be bent is positioned in the bending template of the bending roller unit 8 provided for the following bending operation. For this purpose, the tool carrier 4 is initially moved by means of the second linear drive 11b a small amount upwards, whereby it is achieved that the gear 14 no longer meshes with the rack 15. A subsequent displacement of the tool carrier 4 in the horizontal direction to the right by means of the first linear drive 11a consequently no longer leads to a rotation of the tool carrier 4. Thus, it is possible to position the portion of the tube 3 to be bent in the bending tool, for which purpose the tool carrier 4 only by means of the two linear actuators 11a, 11b must be moved further without this would be an unwanted rotation of the tool carrier 4 would be connected. The Fig. 6 shows the achievement of this second operating position already in the Fig. 2 is presented from a different perspective.

Claims (9)

  1. Device for bending elongated work pieces, with a base support (1), a tool support (4), with at least two bending tools, and a rotational drive for rotating the tool support (4) about the axis of rotation, wherein the base support (1) and the tool support (4) are designed for a relative displacement with respect to each other along at least one axis by means of a drive, and one of the bending tools in each case can be brought by way of a rotation of the tool support (4) about an axis of rotation into engagement with the work piece to be bent, characterised by a gear which translates the displacement of the tool support (4), which can be executed by the drive, relative to the base support (1) for the rotational drive into the rotational movement of the tool support (4) about the axis of rotation.
  2. Device according to claim 1, characterised in that the drive for the relative displacement comprises at least one linear drive (11a) by which the tool support (4) can be displaced relative to the base support (1).
  3. Device according to claim 2, characterised in that the gear has a drive wheel connected to a shaft of the tool support (4) which defines the axis of rotation, which wheel rolls on a contact face on a displacement of the tool support (4) by way of the linear drive (11 a).
  4. Device according to claim 3, characterised by a toothed wheel (14) rolling on a toothed rack (15).
  5. Device according to any one of claims 2 to 4, characterised by a second linear drive (11 b) by way of which the tool support (4) can be displaced relative to the base support (1), wherein a linear guide (13b) of the second linear drive (11b) is oriented non-parallel to a linear guide (13a) of the first linear drive (11a).
  6. Device according to claim 5 and 3, characterised in that the drive wheel can be brought into contact with the contact face by a displacement of the tool support (4) relative to the base support (1) along the second linear guide (13b).
  7. Device according to either of claims 5 or 6, characterised in that the first (13a) and second linear guide (13b) are oriented perpendicularly to each other.
  8. Device according to any one of claims 5 to 7, characterised in that the first (13a) and the second linear guide (13b) define a displacement plane of the tool support (4) which is oriented perpendicular to the longitudinal axis of a section of the work piece to be bent which is held on the base support (1).
  9. Device according to any one of the preceding claims, characterised in that the axis of rotation is oriented parallel to the longitudinal axis of a section of the work piece to be bent which is held on the base support (1).
EP20100008714 2009-08-24 2010-08-20 Device for bending elongated workpieces Not-in-force EP2289643B1 (en)

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Application Number Priority Date Filing Date Title
DE102009038384A DE102009038384A1 (en) 2009-08-24 2009-08-24 Device for bending elongate workpieces

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EP2289643A2 EP2289643A2 (en) 2011-03-02
EP2289643A3 EP2289643A3 (en) 2011-10-05
EP2289643B1 true EP2289643B1 (en) 2013-11-06

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DE102009038384A1 (en) 2011-03-03
EP2289643A3 (en) 2011-10-05

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