Device and method for deforming at least one conductor piece arranged in a stator

Abstract

The invention relates to a device (10) for deforming at least one conductor piece (14) arranged in a stator (12), having features of claim 1, and to a method for shaping at least one conductor piece (14) arranged in a stator (12), having features of the additional independent claim.

Description

[0001] Title: Device and method for forming at least one conductor piece arranged in a stator

[0002] Description

[0003] The invention relates to a device for forming at least one conductor piece arranged in a stator with features of claim 1 and to a method for forming at least one conductor piece arranged in a stator with features of the independent claim.

[0004] In what is known as hairpin technology, hairpin-shaped conductor pieces (hairpins) are inserted into a stator together with individual, different types of special pins. Hairpins are conductor pieces with essentially two elongated legs and a connecting section connecting these two legs. The large number of conductor pieces is usually arranged in such a way that the conductor pieces are arranged in rows on several circular paths running in a circumferential direction, each of which extends in a radial direction. The free ends of the legs protrude from one side of the stator, and the connecting sections are arranged on the other side of the stator.

[0005] After insertion, the free ends are twisted or bent in the circumferential direction, whereby this step is also called "twisting". In this process, individual hairpins (generally conductor pieces or their free ends) are

[0006] Clockwise and others counterclockwise in the circumferential direction. Typically, the hairpins are twisted in such a way that after twisting they are arranged in a directly adjacent row or the row after next (it is also conceivable that further rows are skipped). The twisting is carried out, for example, by means of concentrically arranged cylinders that are rotatable, with conductor pieces that are arranged on a circular path being received in corresponding receptacles in a cylinder. Twisting the cylinders relative to one another bends the conductor pieces on adjacent circular paths in different directions.

[0007] Before twisting, it may be desirable to bend the hairpins radially outward (to widen) or radially inward. The present invention addresses this forming step and provides a device and a method for forming the conductor pieces accordingly.

[0008] After twisting, the hairpins are usually cut to length (shortened to a specified length) and then certain hairpins / conductor pieces or their free ends are welded together to form the windings of the stator.

[0009] The tools used for both expanding and twisting must be stator- and pin-specific. This hampers the flexible use of machines. This makes machining different pin geometries with a single machine difficult or even impossible, especially if no (quickly) interchangeable tools are available.

[0010] The current market situation requires variant-flexible systems or machines that can be changed over from one stator or pin type to another during production without causing long downtimes.

[0011] It is an object of the present invention to provide a device and a method for forming a conductor piece arranged in a stator, wherein the device and the method can be used as flexibly as possible and the forming can be carried out on as many different conductor pieces as possible using simple means.

[0012] The above object is achieved by a device for forming one, in particular several, conductor pieces arranged in a stator, having the features of claim 1. The forming can, in particular, involve widening.

[0013] The conductor piece can be a hairpin with two elongated legs and a connecting section connecting these two legs. A plurality of conductor pieces is arranged in rows in the stator. The rows each extend along a radial direction. The forming takes place in or at a free end of the conductor piece protruding from the stator.

[0014] The device comprises at least two tools, each with a receptacle for receiving at least one free end of the conductor section. Each receptacle can be configured to receive multiple free ends of multiple conductor sections. The tools are arranged on a tool holder and are each designed to be transferable (or movable) between a working position and a storage position.

[0015] In the working position, forming of the conductor section (or sections) is possible using the respective tool arranged in the working position. In the storage position, forming of the conductor section (or sections) is not possible using the respective tool arranged in the storage position. In other words, forming is only possible with the tool that is in the working position.

[0016] The tools can each be elongated with a first end and a second end. The tools can each have an L-shape or a Z-shape. The tools can each be fastened to the tool holder by their first end. The fastening can be implemented, for example, by means of a screw connection, a pin and / or two fitting screws. The tools can also be inserted in a guide and secured against falling out with a spring-loaded bolt. The receptacle for receiving at least one free end of at least one conductor section can be arranged at their second end. The receptacles can each have a rectangular, square, round and / or oval shape. The receptacles can each have a rectangular, square, round and / or oval cross-section.

[0017] This makes it possible to provide a tool magazine using simple means, whereby several tools can be exchanged quickly and easily, if necessary, automatically. The device can therefore be adapted or converted quickly and flexibly to different formats of conductor pieces. Furthermore, the special pins (single pins) and hairpins (double pins) can be processed with the same device or machine during expansion. Two separate devices are no longer necessary. Short cycle times can be implemented and maintained.

[0018] According to a further development of the device, the device can be designed such that the tools and / or the tool holder can be moved along an expansion direction and / or along an axial direction and / or about a pivot axis. The device can be designed such that, in particular, the tool arranged in the working position can be moved along an expansion direction and / or along an axial direction and / or about a pivot axis. In the present case, "axial" or "axial direction" means a direction along the central longitudinal axis or parallel to the central longitudinal axis of the

[0019] The term "radial" refers to a direction aligned with the stator's center longitudinal axis. In other words, the stator's center longitudinal axis is oriented along the axial direction. Accordingly, "radial" or "radial direction" refers to a direction aligned perpendicular to the stator's center longitudinal axis and emanating from the stator's center longitudinal axis. The axial direction can be oriented along the direction of gravity. The radial direction can be oriented perpendicular to the direction of gravity.

[0020] In this context, "expansion direction" refers to the direction in which the conductor section(s) are formed or expanded. The "expansion direction" corresponds in particular to the radial direction during forming with respect to the row in which the conductor section(s) are formed. The expansion direction can be oriented perpendicular to the direction of gravity. The expansion direction and the axial direction can be oriented perpendicular to each other.

[0021] The pivot axis can be oriented perpendicular to the expansion direction and perpendicular to the axial direction. The pivot axis can run through the conductor section to be formed. The pivot axis can run through an upper inner or upper outer point of the holder that contacts the conductor section.

[0022] This allows the conductor section(s) to be formed or expanded radially outward or radially inward (along the expansion direction) using the tool arranged in the working position or its holder. The movement around the pivot axis (pivoting movement) allows the free end to be bent over, so that any springback of the conductor section after the forming process can be compensated.

[0023] According to a further development of the device, the tools can be designed so that they can be transferred between the working position and the storage position by at least one rotation about a rotation axis. In this case, rotation can be carried out by, for example, 180° (with two tools), 120° (with three tools), or 90° (with four tools). Rotation through other angular ranges is also conceivable. The rotation or rotation can be carried out automatically, for example, by means of an (electric) drive or manually.

[0024] The pivoting movement of the tool and / or the tool holder can consist of a superposition of a first, second and third movement. The first movement can be a movement along the axial direction. This can be implemented by means of a first drive. The second movement can be a movement along the expansion direction. This can be implemented by means of a second drive. The third movement can be a rotational movement (or pivoting movement) about the rotational axis. This can be implemented by means of a third drive.

[0025] This means that the third drive can be used both for the swivel movement during expansion (forming the conductor section or sections) and for changing the tools (transferring the tools between the working position and the storage position).

[0026] The pivoting movement refers, in particular, to a relative movement between the tool or tool holder and the conductor section or stator. Thus, the tool or tool holder and / or the conductor section or stator can be pivoted about the pivot axis. In other words, only the tool (or tool holder), only the conductor section (or stator), or both can be pivoted about the pivot axis.

[0027] This allows you to select between the individual tools by simply turning.

[0028] According to a further development of the device, the axis of rotation can be oriented perpendicular to the expansion direction and perpendicular to the axial direction.

[0029] This allows the tools to be turned using simple means.

[0030] According to a further development of the device, the axis of rotation can be oriented parallel to the axial direction.

[0031] This allows the tools to be turned using simple means.

[0032] According to a further development of the device, the tools can be designed so that they can be transferred between the working position and the storage position by at least one translational movement (or displacement). The translational movement or displacement can, in particular, mean a linear translational movement or displacement. This allows selection between the individual tools by means of a simple movement or displacement. For example, bearings, which are required when implementing a rotary movement, can be dispensed with.

[0033] According to a further development of the device, the translational movement can be oriented parallel to the expansion direction. Alternatively or additionally, the translational movement can be oriented perpendicular to the axial direction. Translational movement can also be a superposition of two, in particular linear, translational movements.

[0034] This allows the translational movement or displacement of the tools to be implemented using simple means.

[0035] According to a further development of the device, the tools and / or their holders can each have different sizes and / or geometries.

[0036] This allows as many different conductor pieces (or conductor piece formats) as possible to be formed using the same device and by choosing the appropriate tool.

[0037] According to a further development of the device, the device may comprise a receptacle for receiving the stator. The receptacle may be configured to pivot the stator about the pivot axis.

[0038] This allows the stator to be positioned or picked up exactly using simple means and thus the forming of the conductor pieces can be carried out precisely.

[0039] The above object is achieved by a method for forming one, in particular several, conductor pieces arranged in a stator, having the features of the appended claim. The forming may, in particular, involve widening the conductor pieces or their free ends.

[0040] The conductor piece can be a hairpin with two elongated legs and a connecting section connecting these two legs.

[0041] A large number of conductor sections are arranged in rows in the stator. Each row extends along a radial direction. The forming process takes place in or at a free end of the conductor section protruding from the stator.

[0042] The procedure includes the following steps:

[0043] Providing a device according to the above statements.

[0044] Forming at least one free end of at least one conductor piece protruding from the stator. Exchanging a first tool of the device for a second tool by transferring the first tool from the working position to the storage position and / or by transferring the second tool from the storage position to the working position.

[0045] With regard to the advantages that can be achieved, reference is made to the relevant explanations of the device. The measures described in connection with the device and / or those explained below can be used to further refine the method.

[0046] According to a further development of the method, the method may comprise the step:

[0047] Rotating the tools and / or the tool holder about a rotation axis in order to exchange the first tool of the device for the second tool of the device (or vice versa).

[0048] This allows you to select between the tools by simply turning them.

[0049] According to a further development of the method, the method may comprise the step:

[0050] At least one translational movement (or shifting) of the

[0051] Tools and / or the tool holder in order to exchange the first tool of the device for the second tool of the device (or vice versa).

[0052] This allows selection between the tools using a simple translational movement or shift.

[0053] Further features, details and advantages of the invention will become apparent from the wording of the claims and from the following description of exemplary embodiments with reference to the drawings. They show:

[0054] Fig. 1 is a perspective view of a device for forming at least one conductor piece arranged in a stator according to a first embodiment;

[0055] Fig. 2 shows an enlarged section of Figure 1;

[0056] Fig. 3 is a perspective view of the device according to a second embodiment;

[0057] Fig. 4 shows an enlarged section of Figure 3;

[0058] Fig. 5 is a perspective view of the device according to a third embodiment;

[0059] Fig . 6 an enlarged section of Figure 5 .

[0060] In the following description and in the figures, corresponding components and elements bear the same reference symbols. For the sake of clarity, not all reference symbols are shown in all figures.

[0061] Figures 1 and 2 show a perspective view and an enlarged section of a device 10 for forming at least one conductor piece 14 arranged in a stator 12 according to a first embodiment.

[0062] The conductor piece 14 can be designed as a hairpin with two elongated legs and a connecting section connecting these two legs. A plurality of conductor pieces 14 are arranged in rows 16 in the stator 12. The rows 16 each extend along a radial direction 18. The forming takes place in or at a free end 20 of the conductor piece 14 protruding from the stator 12.

[0063] For the sake of clarity, the stator 12 is only shown schematically in Figure 1. Furthermore, only one row 16 is shown in Figure 1.

[0064] The device 10 may include a receptacle for receiving the stator 12 (not shown).

[0065] The device 10 comprises at least two tools 22, each having a receptacle 24 for receiving a free end 20 of the conductor section 14. The tools 22 are arranged on a tool holder 26. The tools 22 are each designed to be transferable or movable between a working position 28 and a storage position 30.

[0066] In the working position 28, the conductor section 14 can be formed using the respective tool 22 arranged in the working position 28. In the storage position 30, the conductor section 14 cannot be formed using the respective tool 22 arranged in the storage position 30. In other words, the forming process always takes place using the tool 22 arranged in the working position 28.

[0067] The tools 22 and / or their receptacles 24 can each have different sizes and / or geometries. For example, the receptacle 24 of a first tool 22 can be designed to receive a single free end 20 of a conductor piece 14. The receptacle 24 of a second tool 22 can be designed to receive several (e.g. two) free ends 20 of several (e.g. two) conductor pieces 14. Accordingly, the receptacle 24 of the second tool 22 is larger than the receptacle 24 of the first tool 22. The tools 22 and / or their receptacles 24 can each be adapted to different formats of conductor pieces 24.

[0068] The device 10 can be designed such that the tools 22, in particular the tool 22 arranged in the working position 28, and / or the tool holder 26 can be moved along an expansion direction 32 and / or along an axial direction 34. The tool 22 in the working position 28 can thus be positioned under the conductor piece 14 to be formed or its free end 20 and moved in the axial direction 34, upwards in Figure 1, in order to receive two free ends 20 of two conductor pieces 14 in the receptacle 24 of the tool 22, which is arranged in the working position 28. The tool 22 (together with the tool holder 26) can then be moved in the expansion direction 32 (or opposite to the expansion direction 32). As a result, the conductor pieces 14 or the free end 20 received in the receptacle 24 are whose free ends 20 radially outwards (i.e. in the expansion direction 32 or .Radial direction 18 ) or radially inwards ( i.e. opposite to the expansion direction 32 or radial direction 18 ) and is thereby deformed or expanded .

[0069] To move the tool 22 or the tool holder 26 along the axial direction 34 and / or along the expansion direction 32, the device 10 may comprise a corresponding (e.g., electric or pneumatic) drive. In the present case, the device 10 comprises a first (electric) drive 33 for a movement along the

[0070] axial direction 34 and a second (electric) drive 35 for movement along the expansion direction 32.

[0071] The tools 22 can be designed to be transferable between the working position 28 and the storage position 30 by at least one rotation about a rotation axis 36.

[0072] In the present case, the device 10 has three tools 22. The three tools 22 are arranged on the tool holder 26 equidistant around the rotation axis 36. The three tools 22 with the

[0073] Tool holders 26 are designed similarly to a wind turbine that rotates around the axis of rotation 36.

[0074] In the present case, the tools 22 each have an elongated shape with a first end 38 and a second end 40. The tools 22 are each fastened by their first end 38 to the tool holder 26. The fastening can be implemented, for example, by means of a screw connection, a pin and / or two fitting screws. The tools 22 can also be inserted in a guide and secured against falling out with a spring-loaded bolt. The respective receptacles 24 are arranged at the respective second end 40 of the tools 22.

[0075] In this case, the tool holder 26 is mounted so as to be rotatable about the rotation axis 36. The rotation axis 36 is oriented perpendicular to the expansion direction 32 and perpendicular to the axial direction 34.

[0076] The tool holder 26 is in this case rotationally coupled to a drive wheel 42. The drive wheel 42 can be driven in rotation or rotation by means of a drive belt 44. The drive belt 44 is in this case coupled to an (electric) third drive 46, so that the

[0077] Tool holder 26 or a change between the three tools 22 can be carried out by means of the third drive 46. This can, for example, be implemented automatically. It is also conceivable that the tools 22 can also be moved manually (by manually rotating the tool holder 26 around the

[0078] Rotation axis 36 ) can be rotated or selected.

[0079] The tools 22, in particular the tool 22 arranged in the working position 28 and / or the tool holder 26, can in this case be pivoted about a pivot axis 37. The pivot axis 37 is oriented parallel to the rotation axis 36 in this case. The pivoting movement of the tools 22 or of the tool holder 26 can consist of a superposition of a first, second and third movement. The first movement can be a movement along the axial direction 34. This can be implemented in this case by means of the first drive 33. The second movement can be a movement along the expansion direction 32. This can be implemented in this case by means of the second drive 35. The third movement can be a rotary movement (or pivoting movement) about the rotation axis 36. This can be implemented by means of the third drive 46.

[0080] The pivoting movement serves in particular to compensate for the springback of the conductor piece 14 or the conductor pieces 14 after the forming process. The pivoting movement can be implemented by means of the three drives 33, 35, 46 described above. Alternatively, it is conceivable that the pivoting movement can be implemented by means of a pivoting movement of the stator 12. A combination of a pivoting movement by means of the three drives 33, 35, 36 and a pivoting movement of the stator 12 is also conceivable. Figures 3 and 4 show a perspective view and an enlarged section of the device 10 according to a second exemplary embodiment.

[0081] For the sake of clarity, the stator 12 is not shown in Figures 2 to 6. Figures 2 to 6 only show the conductor pieces 14 received in the receptacle 24 or their free ends 20 of the tool 22 arranged in the working position 28.

[0082] The second embodiment differs from the first embodiment shown in Figures 1 and 2 in the following:

[0083] The tools 22 and the tool holder 26 are designed differently. In this case, the device 10 has two tools 22. In this case, no change between the two tools 22 can be performed using the third drive 46.

[0084] The tool holder 26 can be mounted rotatably about a first axis 39. The first axis 39 can be oriented perpendicular to the expansion direction 32 and perpendicular to the axial direction 34.

[0085] The tools 22, in particular the tool 22 arranged in the working position 28, and / or the tool holder 26 can be pivoted about the pivot axis 37 in the present case. The pivot axis 37 is oriented perpendicular to the rotation axis 36 in the present case. The pivoting movement of the tools 22 or of the tool holder 26 can consist of a superposition of a first, second and third movement. The first movement can be a movement along the axial direction 34. This can be implemented in the present case by means of the first drive 33. The second movement can be a movement along the expansion direction 32. This can be implemented in the present case by means of the second drive 35. The third movement can be a rotational movement (or pivoting movement) about the first axis 39. This can be implemented by means of a fourth drive (not shown). For this purpose, the fourth drive can be arranged on the tool holder 26 and / or coupled to the tool holder 26.

[0086] The pivoting movement can thus be implemented by means of the first drive 33, by means of the second drive 35, and by means of the fourth drive. Alternatively, it is conceivable that the pivoting movement can be implemented by means of a pivoting movement of the stator 12. A combination of a pivoting movement by means of the first drive 33, by means of the second drive 35, and by means of the fourth drive and a pivoting movement of the stator 12 is also conceivable.

[0087] In the present case, the tools 22 each have an elongated shape with a first end 38 and a second end 40. The tools 22 are each fastened by their first end 38 to the tool holder 26. The fastening can be implemented, for example, by means of a screw connection, a pin and / or two fitting screws. The tools 22 can also be inserted in a guide and secured against falling out with a spring-loaded bolt. The respective receptacles 24 are arranged at the respective second end 40 of the tools 22.

[0088] In this case, the tools 22 are designed to be transferable between the working position 28 and the storage position 30 by at least one rotation about the rotation axis 36. In this case, the rotation axis 36 is oriented parallel to the axial direction 34. In this case, the tool holder 26 is designed in the form of a rod-shaped cylinder. Here, too, it is conceivable that the tool holder 26 or the tools 22 can be rotated automatically and / or manually about the rotation axis 36.

[0089] Figures 5 and 6 show a perspective view and an enlarged section of the device 10 according to a third embodiment.

[0090] The third embodiment differs from the first embodiment shown in Figures 1 and 2 in the following:

[0091] The tools 22 and the tool holder 26 are designed differently. In this case, the device 10 has three tools 22. In this case, no change between the two tools 22 can be performed using the third drive 46.

[0092] The tool holder 26 can be mounted rotatably about a second axis 41. The second axis 41 can be oriented perpendicular to the expansion direction 32 and perpendicular to the axial direction 34.

[0093] The tools 22, in particular the tool 22 arranged in the working position 28 and / or the tool holder 26, can in this case be pivoted about the pivot axis 37. The pivoting movement of the tools 22 or of the tool holder 26 can consist of a superposition of a first, second and third movement. The first movement can be a movement along the axial direction 34. This can be implemented in this case by means of the first drive 33. The second movement can be a movement along the expansion direction 32. This can in this case be implemented by means of the second drive 35. The third movement can be a rotary movement (or pivoting movement) about the second axis 41. This can be implemented by means of a fifth drive (not shown). For this purpose, the fifth drive can be arranged on the tool holder 26 or coupled to the tool holder 26.

[0094] The pivoting movement can thus be implemented by means of the first drive 33, by means of the second drive 35 and by means of the fifth drive. Alternatively, it is conceivable that the pivoting movement can be implemented by means of a pivoting movement of the stator 12. A combination of a pivoting movement by means of the first drive 33, by means of the second drive 35 and by means of the fifth drive and a pivoting movement of the stator 12 is also conceivable. In the present case, the tools 22 each have an elongated shape with a first end 38 and a second end 40. The tools 22 are each fastened by their first end 38 to or in the tool holder 26. The respective receptacles 24 are arranged at the respective second end 40 of the tools 22.

[0095] In the present case, the tools 22 are designed to be transferable between the working position 28 and the storage position 30 by at least one translational movement. The translational movement can be oriented parallel to the expansion direction 32 and / or perpendicular to the expansion direction 32 and the axial direction 34. The translational movement can be a combination of several translational, in particular linear, movements.

[0096] The three tools 22 are in this case received in the tool holder 26. For this purpose, the tool holder 26 has three openings 48 into which the respective tools 22 can be inserted with their respective first end 38. To move one of the three tools 22 into the working position 28, it is moved by means of a first (rectilinear) translational movement of the tool holder 26 along a direction 50 which is oriented perpendicular to the expansion direction 32 and perpendicular to the axial direction 34, until the tool 22 is oriented with its longitudinal extent along the radial direction 18. By means of a second (rectilinear) translational movement, the tool 22 is moved out of the tool holder 26 along the expansion direction 32 or along the radial direction 18 (towards the stator 12). The first and the second movement can also be combined in one movement.The movement of the tool 22 from the working position 28 to the storage position 30 can be implemented analogously in reverse.

[0097] The two other tools 22, which are each arranged in the storage position 30, are received further in the tool holder 26 along the expansion direction. In other words, the receptacles 24 of the tools 22, which are each arranged in the storage position 30, are further away from the stator 12 with respect to the expansion direction 32 than the receptacle 24 of the tool 22 which is arranged in the working position 28. This ensures that, despite the tools 22 being arranged next to one another, the tools 22, which are each arranged in the storage position 30, do not hinder the expansion process or the receiving process of the conductor pieces 14 or their free ends 20.

[0098] A method for forming at least one conductor piece 14 arranged in a stator 12 is described below with reference to Figures 1 to 6. The conductor piece 14 can be a hairpin with two elongated legs and a connecting section connecting these two legs. A plurality of conductor pieces 14 are arranged in rows 16 in the stator 12. The rows 16 each extend along a radial direction 18. The forming takes place in or on a free end 20 of the conductor piece 14 protruding from the stator 12.

[0099] The method comprises the steps of: Providing a device 10 according to the above statements.

[0100] This may be a device 10 as shown in Figures 1 to 6.

[0101] Forming at least one free end 20 of the conductor piece 14 protruding from the stator 12.

[0102] Exchanging a first tool 22 of the device 10 for a second tool 22 by transferring the first tool 22 from the working position 28 to the storage position 30 and / or by transferring the second tool 22 from the storage position 30 to the working position 28.

[0103] The method may comprise the step of:

[0104] Rotating the tools 22 and / or the tool holder 26 about a rotation axis 36 in order to exchange the first tool 22 of the device 10 for the second tool 22 of the device 10.

[0105] The method may comprise the step of:

[0106] At least one, in particular rectilinear, translational movement of the tools 22 and / or the tool holder 26 in order to exchange the first tool 22 of the device 10 for the second tool 22 of the device 10.

Claims

Patent claims 1. A device (10) for forming at least one conductor piece (14) arranged in a stator (12), wherein the conductor piece (14) is in particular a hairpin with two elongated legs and a connecting section connecting these two legs, wherein a plurality of conductor pieces (14) are arranged in rows (16) in the stator (12), wherein the rows (16) each extend along a radial direction (18), wherein the forming takes place in or on a free end (20) of the conductor piece (14) protruding from the stator (12), wherein the device (10) has at least two tools (22), each with a receptacle (24) for receiving at least one free end (20) of the conductor piece (14), wherein the tools (22) are arranged on a tool holder (26) and are each designed to be transferable between a working position (28) and a storage position (30),wherein in the working position (28) a forming of the conductor piece (14) is possible by means of the respective tool (22) arranged in the working position (28), wherein in the storage position (30) a forming of the conductor piece (14) is not possible by means of the respective tool (22) arranged in the storage position (30).

2. Device (10) according to claim 1, characterized in that the device (10) is designed such that the tools (22), in particular the tool (22) arranged in the working position (28), and / or the tool holder (26) are arranged along a Expansion direction (32) and / or along an axial direction (34) and / or about a pivot axis (37).

3. Device (10) according to claim 1 or 2, characterized in that the tools (22) are designed to be transferable between the working position (28) and the storage position (30) by at least one rotation about an axis of rotation (36).

4. Device (10) according to claim 2 and 3, characterized in that the axis of rotation (36) is perpendicular to the expansion direction (32) and perpendicular to the axial direction (34) is oriented.

5. Device (10) according to claim 2 and 3, characterized in that the axis of rotation (36) is oriented parallel to the axial direction (34).

6. Device (10) according to claim 1 or 2, characterized in that the tools (22) are designed to be transferable between the working position (28) and the storage position (30) by at least one translational movement.

7. Device (10) according to claim 2 and 6, characterized in that the translational movement is parallel to the expansion direction (32) and / or perpendicular to the expansion direction (32) and to the axial direction (34).

8. Device (10) according to one of the preceding claims, characterized in that the tools (22) and / or their receptacles (24) each have different sizes and / or geometries.

9. Device (10) according to one of the preceding claims, characterized in that the device (10) comprises a receptacle for receiving the stator (12).

10. Method for forming at least one in a stator (12) arranged conductor piece (14), wherein the conductor piece (14) is in particular a hairpin with two elongated legs and a connecting section connecting these two legs, wherein in the stator (12) a plurality of conductor pieces (14) arranged in rows (16) each extending along a radial direction (18), the method comprising the steps of: Providing a device (10) according to any one of the preceding claims; forming at least one free end (20) of the conductor piece (14) protruding from the stator (12); Changing a first tool (22) of the device (10) against a second tool (22) by transferring the first tool (22) from the Working position (28) into the storage position (30) and / or by transferring the second tool (22) from the storage position (30) into the working position (28).

11. Method according to claim 10, characterized by the step: Rotating the tools (22) and / or the tool holder (26) about a rotation axis (36) in order to exchange the first tool (22) of the device (10) for the second tool (22) of the device (10).

12. Method according to claim 10, characterized by the step: At least one, in particular rectilinear, translational movement of the tools (22) and / or the tool holder (26) in order to exchange the first tool (22) of the device (10) for the second tool (22) of the device (10).

Images