EP3600712B1 - Wire straightening system and method for straightening wires by means of the wire straightening system - Google Patents

Description

The invention relates to a wire straightening system for aligning wire, as well as a method for aligning wires with different wire diameters using the wire straightening system.

Wire straightening systems are used to produce straightened rod material from material sources with non-straightened wires or rods, such as rolls of reinforcing steel wire. The wire is processed by rotating straightening tools, each of which comprises a straightening jaw or straightening rollers arranged at an angle to the wire. In the interest of high production output, a number of parallel straightening tools rotating around their axis are provided. Only one of the straightening tools is in operation at a time, while the other straightening tools are in a rest position.

From the EP 0 143 960 A2 A device for straightening and cutting wire and rod-shaped material to length is known, with a cutting device arranged downstream of a straightening tool. Furthermore, a pivoting magazine consisting of inlet guides, intermediate guides and end guides is provided, to which two pairs of push rollers are assigned. In addition, straightening tools are arranged in a turret system according to the number of inlet guides and the diameter of the material to be processed. A pair of pull rollers and a cutting device are arranged downstream of the turret system.

The EP 0 143 960 A2 The known device has the disadvantage that changing between different wire diameters is complicated and causes long idle times.

From the AT 517 095 B1 A wire straightening system is known which has a plurality of straightening tools. The straightening tools are arranged so as to be rotatable along tool axes running parallel to one another in a horizontal plane. Each straightening tool is equipped with straightening roller arrangements arranged one behind the other along the tool axis and at an angle to the wire which also runs in the tool axis, or has a straightening jaw arranged on each of the parallel tool axes and is connected by means of a in the tool axis and a toothed belt resting on the same, are driven in rotation by a drive motor. The straightening tools, together with their respective gear and toothed belt, as well as a roller arranged at the lower deflection point of the toothed belt, are arranged on a carriage that can be moved transversely to the tool axes. By means of the carriage, the straightening tool to be used, together with the gear, toothed belt and roller, can be moved to the drive means of a single, essentially stationary drive motor in such a way that the lower roller is located near this drive means and the toothed belt can be coupled to the drive means.

The AT 517 095 B1 The known device has the disadvantage that changing between different wire diameters is complicated and causes long idle times.

The DE 2733407 A1 , which forms the basis for the preamble of claim 1, discloses a wire straightening system with a machine frame and several straightening tools for different wire diameters, which are arranged like a revolver drum on a tool holder. The tool holder can be pivoted relative to the machine frame in order to be able to straighten the required wire diameter in each case. The wire to be straightened in each case is guided through a recess in the machine frame. To change the diameter to a different wire, the last straightened wire is pulled out of the straightening tool, then the tool holder is pivoted so that a straightening tool for a different diameter is brought into the straightening position and then the new wire with the different diameter is inserted into the new straightening tool.

The object of the present invention was to overcome the disadvantages of the prior art and to provide a device and a method by means of which it is easier to change between wires of different diameters.

This object is achieved by a device and a method according to the claims.

According to the invention, a wire straightening system is designed for aligning wire. The wire straightening system comprises the features of independent claim 1.

The wire straightening system according to the invention has the advantage that in order to change between two wires with different diameters, the wires do not have to be led out of the straightening tool, as is the case in the prior art. This reduces the time required for changing the wire, and also reduces the susceptibility of the wire straightening system to errors, since the wire does not have to be reinserted into the tool holder every time the diameter changes. This measure also prevents waste, since the position of the wire is known and remains constant, and an initial cut, which is necessary due to the renewed insertion of the wire, does not have to be carried out every time the diameter changes. In addition, the wire straightening system according to the invention has a compact design despite the advantages mentioned above.

In order to enable the individual wires with different diameters to remain in the respective straightening tool, it is necessary that the individual wires are guided to the tool holder in a freely movable manner over a certain length so that the tool holder with the wires in it can rotate freely to form a wire unwinding device.

According to the invention, the torque transmission units are mounted on the tool holder and can be rotated about the central axis of rotation together with the associated straightening tools, and the drive motor is mounted on the machine frame so that it can be moved axially relative to the torque transmission units and can be coupled to the individual torque transmission units as desired by means of a torque coupling that can be released by axial displacement, with a first coupling element of the torque coupling being torque-coupled to the drive motor and a second coupling element of the torque coupling being torque-coupled to each of the torque transmission units. The advantage here is that this measure for rotating the tool holder allows the drive motor to be disengaged, thereby releasing the tool holder. This means that only one drive motor is required to align wires with different diameters. In addition, the drive motor or the torque transmission units can have a stable structure.

Furthermore, it can be provided that the individual straightening tools are coupled to a parking brake. The advantage here is that the parking brake can brake the individual straightening tools against rotation. This allows the wire to be clamped in the individual straightening tools. This means that the wire does not have to be pulled out of the straightening tool to be removed from the straightening position in order to rotate the tool holder, but that the wire can remain in it. In addition, it can be provided that all straightening tools are arranged at an angle of less than 180° with respect to the central axis of rotation on the tool holder. This measure makes it possible to ensure that the wire does not have to be removed from the tool holder in order to rotate it. In particular, this ensures that when the tool holder is rotated, none of the straightening tools and also not the wire collide with the machine frame of the wire straightening system.

In addition, it can be provided that the tool holder can be rotated at an angle of less than 180° with respect to the central axis of rotation. This measure in combination with the previous measure ensures that when the tool holder is rotated the individual straightening tools or the wire held in the individual straightening tools does not collide with the machine frame.

According to a further development, it is possible for the tool holder to have a first end element in which the first of the rotary bearings for supporting the tool holders are formed, and a second end element in which the second of the rotary bearings for supporting the tool holders are formed, wherein the two end elements are coupled to one another by means of a connecting component and wherein a recess is formed in the connecting component through which a bearing support of the machine frame is guided, wherein a main rotary bearing of the tool holder is arranged on the bearing support of the machine frame. This measure allows the tool holder to be rotatably mounted on the machine frame.

It can also be useful if the drive motor for driving the straightening tools is arranged between the two end elements and is mounted on the bearing support of the machine frame so that it can be moved axially. The advantage here is that this measure allows the entire wire straightening system to have a slim and space-saving design.

According to the invention, the torque transmission units each have a first drive disk torque-coupled to the straightening tool and a second drive disk torque-coupled to the second coupling element of the torque coupling, the first drive disk and the second drive disk being coupled to one another by means of a traction means, in particular with at least one V-belt. The advantage here is that such torque transmission units can be constructed simply and also have good strength and good power transmission.

For example, it is possible that the drive pulleys are designed in the form of V-belt pulleys and a V-belt is used as the traction device.

In yet another design variant, it is also conceivable that the drive disks are designed in the form of sprockets and the traction device is formed by a chain.

In a further embodiment, it is also conceivable that the drive pulleys are designed in the form of toothed belt pulleys and a toothed belt serves as the traction means.

Furthermore, it can be provided that the two first drive disks of adjacent torque transmission units are axially offset from each other by at least one drive disk width. As a result, two adjacent drive disks can have a larger diameter without colliding. In addition, this measure can improve the guidance of the traction means.

According to a particular embodiment, it is possible for the torque coupling to be designed in the form of a claw coupling, wherein the first coupling element and the second coupling element have claws designed to engage with one another, which serve to transmit torque. The advantage here is that such a claw coupling is well suited for switchable coupling of the drive motor in the straightening system according to the invention.

According to an advantageous development, it can be provided that an angle centering aid is arranged on the two coupling elements, which serves to bring the two coupling elements together. The advantage here is that this measure means that an angular misalignment between the two coupling elements when establishing the torque connection does not lead to a component of the wire light system being damaged. The angle centering aid adjusts the relative angle of rotation of the two coupling elements to one another while the two coupling elements are being brought together, so that the individual claws of the coupling elements can engage with one another.

In particular, it can be advantageous if a main drive motor is designed for the rotary drive of the tool holder, wherein the main drive motor is arranged outside the tool holder in the region of the first end element.

• Bereitstellen eines ersten Drahtes mit einem ersten Drahtdurchmesser durch Aufnahme des ersten Drahtes in einem ersten Richtwerkzeug;
• Bereitstellen eines zweiten Drahtes mit einem zweiten Drahtdurchmesser durch Aufnahme des zweiten Drahtes in einem zweiten Richtwerkzeug;
• Ausrichten des ersten Drahtes durch drehen des ersten Richtwerkzeuges um seine Werkzeugachse, wobei sich das erste Richtwerkzeug in seiner Richtposition befindet;
• Abschneiden des ersten Drahtes und axiales Verschieben des Hauptantriebsmotors zum Lösen der Drehmomentübertragung zwischen dem Hauptantriebsmotor und dem aus der Richtposition zu entfernenden Richtwerkzeug;
• Verdrehen der Werkzeugaufnahme um die zentrale Drehachse, sodass das erste Richtwerkzeug von seiner Richtposition in eine Ruheposition verstellt wird und das zweite Richtwerkzeug von einer Ruheposition in die Richtposition verstellt wird, wobei der erste Draht im ersten Richtwerkzeug aufgenommen bleibt und der zweite Draht im zweiten Richtwerkzeug aufgenommen bleibt;
• Axiales Verschieben des Hauptantriebsmotors zum Herstellen der Drehmomentübertragung zwischen dem Hauptantriebsmotor und dem in die Richtposition beförderten Richtwerkzeug;
• Ausrichten des zweiten Drahtes durch drehen des zweiten Richtwerkzeuges um seine Werkzeugachse, wobei sich das zweite Richtwerkzeug in seiner Richtposition befindet.

Furthermore, a method for aligning wires with different wire diameters is provided. The wire straightening system according to the invention is used. The method comprises the following method steps:

• Providing a first wire having a first wire diameter by receiving the first wire in a first straightening tool;
• Providing a second wire having a second wire diameter by receiving the second wire in a second straightening tool;
• Aligning the first wire by rotating the first straightening tool about its tool axis, with the first straightening tool in its straightening position;
• Cutting the first wire and axially moving the main drive motor to release the torque transmission between the main drive motor and the straightening tool to be removed from the straightening position;
• Rotating the tool holder about the central axis of rotation so that the first straightening tool is moved from its straightening position to a rest position and the second straightening tool is moved from a rest position to the straightening position, wherein the first wire remains received in the first straightening tool and the second wire remains received in the second straightening tool;
• Axial displacement of the main drive motor to establish the torque transmission between the main drive motor and the straightening tool moved into the straightening position;
• Aligning the second wire by rotating the second straightening tool around its tool axis, with the second straightening tool in its straightening position.

The method according to the invention has the advantage that the wire held in the individual straightening tools of the wire straightening system remains clamped even when changing to another straightening tool with a different diameter, thus allowing an accelerated change between the individual wire diameters.

In addition, it can be provided that in order to rotate the tool holder around the central axis of rotation, the first straightening tool and the second straightening tool are clamped using the parking brake so that they cannot rotate around their tool axis. The advantage here is that this measure allows the wire to be clamped in the individual straightening tools and thus fixed in its position. If this measure were not carried out, the wire would twist the straightening tool due to its internal pre-tension when the drive motor is decoupled and would therefore be moved into an axially undefined position.

Another advantageous embodiment is one in which it can be provided that, before the drive motor is axially displaced to establish the torque transmission between the drive motor and the straightening tool moved into the straightening position, the drive shaft of the drive motor is adjusted to an angular position known from the last engagement with the straightening tool moved into the straightening position. This measure allows the two coupling elements to be rotated relative to one another into an angular position in which the claws can engage with one another.

For a better understanding of the invention, it is explained in more detail with reference to the following figures.

Fig. 1

ein Ausführungsbeispiel einer Draht-Richtanlage in einer perspektivischen Ansicht;

Fig. 2

das Ausführungsbeispiel der Draht-Richtanlage in einer weiteren perspektivischen Ansicht;

Fig. 3

Bestandteile der Draht-Richtanlage;

Fig. 4

den Antriebsstrang eines in seiner Richtposition befindlichen Richtwerkzeuges der Draht-Richtanlage;

Fig. 5

eine Detailansicht einer Drehmomentkupplung zur Verwendung in der Draht-Richtanlage;

Fig. 6

eine schematische Schnittdarstellung durch ein Ausführungsbeispiel einer Werkzeugaufnahme der Draht-Richtanlage.

They show in a highly simplified, schematic representation:

Fig.1

an embodiment of a wire straightening system in a perspective view;

Fig. 2

the embodiment of the wire straightening system in another perspective view;

Fig.3

Components of the wire straightening system;

Fig.4

the drive train of a straightening tool of the wire straightening system in its straightening position;

Fig.5

a detailed view of a torque coupling for use in the wire straightening system;

Fig.6

a schematic sectional view through an embodiment of a tool holder of the wire straightening system.

By way of introduction, it should be noted that in the various embodiments described, identical parts are provided with identical reference symbols or identical component designations, The disclosures contained in the entire description can be transferred analogously to the same parts with the same reference symbols or the same component designations. The position information chosen in the description, such as top, bottom, side, etc., also refers to the figure directly described and shown, and these position information must be transferred analogously to the new position in the event of a change in position.

Fig.1 shows a schematic representation of a wire straightening system 1 for aligning wires 2. In particular, it is provided that wires 2 with different diameters can be aligned in the wire straightening system 1. The wires 2 fed to the wire straightening system 1 are preferably provided on a wire unwinding device 3. Different wire rolls with wires of different diameters can be accommodated in the wire unwinding device 3.

As in the EP 0 143 960 A2 As disclosed, the wire straightening system 1 can be followed by a cutting device or other handling devices for further processing of the straightened wire. For the sake of brevity, this document does not discuss the other handling options or does not show them. The straightened wires 2 are preferably used for the production of reinforcement elements, such as reinforcement mats.

The wire straightening system 1 has a machine frame 4 on which a tool holder 5 is arranged. The tool holder 5 is mounted on the machine frame 4 so as to be rotatable with respect to a central axis of rotation 6.

In particular, a bearing support 7 can be formed on the machine frame 4, on which a main pivot bearing 8 of the tool holder 5 is arranged. The main pivot bearing 8 can, for example, be designed in the form of two bearing blocks that are axially spaced apart from one another.

Furthermore, it can be provided that the tool holder 5 comprises a bearing shaft 9 which is rotatably received in the main pivot bearing 8 of the tool holder 5.

The tool holder 5 serves to hold straightening tools 10, which are used to align the wire 2. The straightening tools 10 are accommodated between a first end element 11 and a second end element 12 of the tool holder 5 and are mounted in the two end elements 11, 12. It is provided that a rotary bearing 13 is formed for each of the straightening tools 10 in the first end element 11 and in the second end element 12. The rotary bearing 13 allows the straightening tools 10 to be rotatable about a tool axis 14 in the tool holder 5.

At least one straightening element, in particular a straightening roller arrangement 15 or straightening jaws, is formed in each of the straightening tools 10. Preferably, It can be provided that at least two straightening roller arrangements 15 are formed for each straightening tool 10, wherein the straightening rollers of the straightening roller arrangements 15 are tilted to the tool axis 14 of the straightening tool 10, so that when the straightening tool 10 rotates about its tool axis 14, the individual rollers of the straightening roller arrangement 15 not only align the wire material 2, but simultaneously serve as a feed.

The two end elements 11, 12 can be supported by the straightening tools 10 and the bearing shaft 9. In addition to or as an alternative to the bearing shaft 9, a connecting component 16 can be formed which is arranged between the two end elements 11, 12. The connecting component 16 can serve to additionally stiffen the tool holder 5. In particular, it can be provided that the connecting component 16 has a basic shape in the form of a hollow cylinder. This can be realized, for example, by a sheet metal component which, as shown in Fig.1 As can be seen, it is bent into a polygonal hollow cylinder. Alternatively, it is also conceivable that the sheet metal component is rolled, for example, to form a hollow cylinder with a circular cross-section.

In order to guide the bearing support 7 up to the main pivot bearings 8, a recess 17 is formed in the connecting component 16, which serves to guide the bearing support 7 of the machine frame 4.

Instead of the described connecting component 16 in the form of a hollow cylinder, it would also be conceivable for the connecting component 16 to be realized by several individual rods which are connected to the first end element 11 and to the second end element 12.

Furthermore, a torque transmission unit 18 is provided, by means of which the straightening tool 10 in a straightening position can be torque-coupled to the drive motor 19. In particular, it can be provided that each of the straightening tools 10 has its own torque transmission unit 18, which can be coupled to the drive motor 19.

Furthermore, it is also conceivable that two or more drive motors 19 are provided, which can each be coupled to a straightening tool 10 at the same time. It is therefore also conceivable that two or more straightening tools 10 can be used simultaneously.

It is also conceivable that two drive motors 19 are provided, which have a different speed on the drive shaft. This means that, for example, straightening tools 10 with a smaller diameter can be driven by the first drive. Straightening tools 10 with a larger diameter can be driven by the second drive. In particular, it is of course conceivable that both drives can be coupled to the respective straightening tools 10.

In particular, it is provided that the drive motor 19 is displaceable in the axial direction relative to the torque transmission unit 18 and that a torque coupling 20 is formed, by means of which the torque-transmitting connection between the drive motor 19 and the torque transmission unit 18 can be released as required by axial displacement of the drive motor 19.

In order to be able to move the drive motor 19 axially, it is mounted on the machine frame 14 so that it can move relative to the latter by means of a linear guide 21. In particular, it can be provided that the linear guide 21 is arranged on the bearing support 7 of the machine frame 4.

As from Fig.1 As can also be seen, it can be provided that a main drive motor 22 is arranged on the machine frame 4, which serves for the rotation drive of the tool holder 5. The main drive motor 22 can be arranged in the area of the first end element 11 of the tool holder 5. In particular, it can be provided that the main drive motor 22 is coupled to the tool holder 5 by means of a toothed belt 23.

Due to the inventive design of the wire straightening system 1, different wires with different diameters can be processed in different straightening tools 10, wherein only one drive motor 19 is provided for the different straightening tools 10.

To change between the individual straightening tools, the drive motor 19 is moved in the axial direction and the torque-transmitting connection between the drive motor 19 and the torque transmission unit 18 is released in the area of the torque coupling 20. The tool holder 5 can then be rotated with respect to its central axis of rotation 6 in order to move the last used straightening tool 10 from the straightening position to a rest position. and at the same time to move another straightening tool 10 with another wire 2 accommodated therein from the rest position into the straightening position. The drive motor 19 is then moved axially forward again so that the torque coupling 20 again forms a torque connection between the drive motor 19 and the torque transmission unit 18.

In order to switch between the individual straightening tools 10, it is not necessary for the individual wires 2 to be pulled out of the straightening tools 10 in the inventive design of the wire straightening system 1. Rather, it is possible for the individual wires 2 to remain in the respective straightening tools 10.

This is achieved by forming a free space 24 between the wire unwinding device 3 and the tool holder 5, in which the individual wires 2 are not guided. As a result, when the tool holder 5 is rotated relative to the wire unwinding device 3, the wires 2 can move freely in the area of the free space 24 and there is no collision with components of the wire straightening system 1. The described structure of the torque transmission units 18 or the drive motor 19 together with the torque coupling 20 also means that the individual wires 2 do not have to be pulled out of the straightening tools 10 in order to change them.

Fig. 2 shows the wire straightening system 1 in a further perspective view, whereby in comparison to Fig.1 the rear side of the wire straightening system 1 is viewed. For identical parts, the same reference symbols or component designations are used as in the previous Fig.1 To avoid unnecessary repetition, please refer to the detailed description in the previous Fig.1 pointed out or referred to.

How particularly good in Fig. 2 As can be seen, it can be provided that a further bearing support 25 of the machine frame 4 is formed, on which a further main pivot bearing 26 is formed, which serves to guide the bearing shaft 9.

Furthermore, it can also be provided that two second end elements 12 are formed, which are arranged at a distance from each other.

Furthermore, it can be provided that the torque transmission unit 18 has a first drive disk 27 and a second drive disk 28, which are coupled to one another by a traction means 29. In the embodiment according to Fig. 2 the first drive pulley 27 and the second drive pulley 28 are designed in the form of a V-belt pulley and a V-belt is used as the traction means 29.

As from Fig. 2 As can also be seen, it can be provided that the two first drive disks 27 of mutually adjacent straightening tools 10 are offset from one another by at least the drive disk width 30.

Thus, every second torque transmission unit 18 is assigned to that second end element 12 which is closer to the straightening tools 10. The remaining torque transmission units 18 are assigned to that second end element 12 which is further away from the straightening tools 10. In other words, every second torque transmission unit can be arranged in a first plane 31 and the remaining torque transmission units 18 can be arranged in a second plane 32.

Furthermore, it can also be provided that tensioning elements 33 are formed in the torque transmission units 18, which serve to tension the traction means 29.

In addition, a parking brake 34 can be designed, by means of which the straightening tools 10 can be clamped in their angular position. The parking brake 34 can basically be arranged at any point in the drive train of a straightening tool 10 or directly on the straightening tool 10. In addition, it is also conceivable that the parking brake 34 is designed, for example, in the form of a disk brake. Furthermore, the parking brake 34 can be designed in the form of a drum brake or in another form.

In the Fig.3 and 4 Individual components of the wire straightening system 1 are hidden, whereby the internal components and thus the functionality of the wire straightening system 1 are visible. Here too, the same reference symbols or component designations are used for the same parts as in the previous Figures 1 and 2 To avoid unnecessary repetition, please refer to the detailed description in the previous Figures 1 and 2 pointed out or referred to.

As from Fig.3 As can be seen, a second coupling element 36 of a torque coupling 20 is coupled to each torque transmission unit 18. The individual parts of the torque coupling 20 are particularly well Fig.5 visible.

In the Fig.4 the connection between the straightening tool 10, which is currently in its straightening position, and the drive motor 19 is shown. As can be seen from Fig.4 As can be seen, an actuating cylinder 42 can be provided which serves to displace the drive motor 19 in the axial direction. The actuating cylinder 42 can be designed, for example, in the form of a pneumatic cylinder.

In the Fig.5 the torque coupling 20 is shown in an exploded view.

As from Fig.5 As can be seen, the torque coupling 20 has a first coupling element 35 which is coupled to the drive motor 19 and a second coupling element 36 which is coupled to the torque transmission unit 18. In the present exemplary embodiment, the two coupling elements 35, 36 are designed in the form of a claw coupling. Furthermore, a damping element 37 is provided which is arranged between the two coupling elements 35, 36, in particular between their claws and thus serves to dampen the torque transmission.

As from Fig.5 As can also be seen, it can be provided that an angle centering aid 38 is arranged on the two coupling elements 35, 36, by means of which the sliding of the two coupling elements 35, 36 into one another can be facilitated. The angle centering aid 38 can comprise a first centering aid 39 and a second centering aid 40, which also mesh with one another. The two centering aids 39, 40 can have centering teeth 41, which are tapered towards the front and thus enable angular centering.

As from Fig.6 As can be seen, the straightening tools 10 are arranged at a distance 43 from the central axis of rotation 6. In particular, it is provided that all of the straightening tools 10 have the same distance 43 from the central longitudinal axis 6. Furthermore, it is also provided that all of the straightening tools 10 are arranged within an angle 44 in the tool holder 5, so that when the tool holder 5 is rotated, the individual straightening tools 10 do not collide with the bearing support 7 of the machine frame 4.

Furthermore, it can also be provided that the connecting component 16 is arranged in a similar angular range 44 as the straightening tools 10. <b>List of reference symbols</b> 1 Wire straightening system 25 additional bearing support machine frame 2 wire 3 Wire unwinding device 26 additional main pivot bearing 4 Machine frame 27 first drive pulley 5 Tool holder 28 second drive pulley 6 central axis of rotation 29 Traction device 7 Bearing support machine frame 30 Drive pulley width 8 Main pivot bearing tool holder 31 first level 32 second level 9 Bearing shaft 33 Clamping element 10 Alignment tool 34 Parking brake 11 first face element tool holder 35 first coupling element 36 second coupling element 12 second face element tool holder 37 Damping element 38 Angle centering aid 13 Pivoting bearing straightening tool 39 first centering aid 14 Tool axis straightening tool 40 second centering aid 41 Centering tooth 15 Straightening roller arrangement 42 Actuator cylinder drive motor 16 Connecting component 43 Distance between straightening tool and central axis of rotation 17 Recess connecting component 44 angle 18 Torque transmission unit 19 Drive motor straightening tool 20 Torque coupling 21 Linear guide 22 Main drive motor 23 Timing belt 24 Free space

Claims (13)

1. Wire straightening arrangement (1) for straightening wire (2), comprising:

   - a machine frame (4);

   - a tool holding fixture (5), which is mounted on the machine frame (4) so that it can rotate about a central axis of rotation (6);

   - at least two setting tools (10) for different wire diameters, which are received in the tool holding fixture (5) by means of rotational supports (13) so as to be rotatable with respect to tool axes (14) extending parallel to one another, each of the setting tools (10) having at least one straightening element, in particular a setting roll arrangement (15) or straightening jaws, wherein the setting tools (10) are arranged at a distance (43) from the central axis of rotation (6) on the tool holding fixture (5) and the individual setting tools (10) can be adjusted between a rest position and a setting position by rotating the tool holding fixture (5) about the central axis of rotation (6);

   - at least one drive motor (19) for driving the setting tool (10);

   - a torque transmission unit (18) for each setting tool (10), which is designed to transmit torque between the drive motor (19) and the respective setting tool (10),

   characterized in that

   the tool holding fixture (5) is designed in such a way that when the

   setting tool (10) remains in the setting tools (10) between the rest position and the setting position of the wire (2), the torque transmission units (18) being mounted on the tool holding fixture (5) and being rotatable about the central axis of rotation (6) together with the respective associated setting tools (10), and in that the drive motor (19) is mounted on the machine frame (4) so as to be axially displaceable relative to the torque transmission units (18) and is connected to the torque transmission units (18) by means of a torque coupling which can be released by axial displacement.

   (20) can be selectively coupled to the individual torque transmission units (18), wherein a first coupling element (35) of the torque coupling (20) is torque-coupled to the drive motor (19) and a second coupling element (36) of the torque coupling (20) is torque-coupled to each of the torque transmission units (18), and wherein the torque transmission units (18) each have a first drive disc (27) torque-coupled to the setting tool (10) and a second drive disc (28) torque-coupled to the second coupling element (36) of the torque clutch (20), wherein the first drive disc (27) and the second drive disc (28) are coupled to one another by means of a pulling means (29), in particular by means of at least one V-belt.
2. Wire straightening arrangement according to claim 1, characterized in that the individual setting tools (10) are coupled with a parking brake (34).
3. Wire straightening arrangement according to one of the preceding claims, characterized in that all setting tools (10) are arranged at an angle (44) of less than 270°, in particular less than 180°, with respect to the central axis of rotation (6) on the tool holding fixture (5).
4. Wire straightening arrangement according to one of the preceding claims, characterized in that the tool holding fixture (5) is rotatable at an angle (44) of less than 180° with respect to the central axis of rotation (6).
5. Wire straightening arrangement according to one of the preceding claims, characterized in that the tool holding fixture (5) has a first front element (11), in which first of the rotational supports (13) for mounting the tool holding fixtures (5) are formed, and has a second front element (12), in which second of the rotational supports (13) for mounting the tool holding fixtures (5) are formed, wherein the two front elements (11, 12) are coupled to one another by means of a connecting component (16) and wherein a recess (17) is formed in the connecting component (16), through which recess a bearing support (7) of the machine frame (4) is guided, wherein a main rotational support (8) of the tool holding fixture (5) is arranged on the bearing support (7) of the machine frame (4).
6. Wire straightening arrangement according to claim 5, characterized in that the drive motor (19) for driving the setting handle (10) is arranged between the two front elements (11, 12) and is axially displaceably mounted on the bearing support (7) of the machine frame (4).
7. Wire straightening arrangement according to one of the preceding claims, characterized in that the two first drive discs (27) of mutually adjacent torque transmission units (18) are axially offset from one another by at least one drive disc width (30).
8. Wire straightening arrangement according to one of the preceding claims, characterized in that the torque coupling (20) is designed in the form of a claw coupling, the first coupling element (35) and the second coupling element (36) having claws which are designed to engage with one another and which serve to transmit torque.
9. Wire straightening arrangement according to one of the preceding claims, characterized in that an angle centering aid (38) is arranged on the two coupling elements (35, 36), which serves to bring the two coupling elements (35, 36) together.
10. Wire straightening arrangement according to one of the preceding claims, characterized in that a main drive motor (22) is formed for the rotary drive of the tool holding fixture (5), the main drive motor (22) being arranged outside the tool holding fixture (5) in the region of the first front element (11).
11. Method for aligning wires (2) with different wire diameters,
    using a wire straightening arrangement (1) according to one of the preceding claims, characterized in that the method comprises the following method steps:

    - Providing a first wire (2) with a first wire diameter by holding the first wire (2) in a first setting tool (10);

    - Providing a second wire (2) with a second wire diameter by holding the second wire (2) in a second setting tool (10);

    - aligning the first wire (2) by rotating the first setting tool (10) about its tool axis (14), the first setting tool (10) being in its setting position;

    - Cutting of the first wire (2) and axial displacement of the drive motor (19) to release the torque transmission between the drive motor (19) and the setting tool (10) to be removed from the setting position;

    - Rotation of the tool holding fixture (5) about the central axis of rotation (6), so that the first setting tool (10) is displaced from its setting position into a rest position and the second setting tool (10) is displaced from a rest position into the setting position, wherein the first wire (2) remains held in the first setting tool (10) and the second wire (2) remains held in the second setting tool (10);

    - Axial displacement of the drive motor (19) to establish the torque transmission between the drive motor (19) and the setting tool (10) conveyed into the setting position;

    Aligning the second wire (2) by rotating the second setting tool (10) about its tool axis (14), with the second setting tool (10) in its setting position.
12. Method according to claim 11, characterized in that, in order to rotate the tool holding fixture (5) about the central axis of rotation (6), the first setting tool (10) and the second setting tool (10) are clamped by means of the parking brake (34) so that they cannot rotate about their tool axis (14).
13. Method according to claim 11 or 12, characterized in that before the axial displacement of the drive motor (19) to establish the torque transmission between the drive motor (19) and the setting tool (10) conveyed into the setting position, the drive shaft of the drive motor (19) is displaced into an angular position known from the last engagement with the setting tool (10) conveyed into the setting position.

Images