Device and Method for Shaping a Component

Abstract

Device for shaping a component, comprising a first tool and a second tool, which can be moved relative to one another along a movement axis to shape a component to be placed between the tools, wherein a surface of the first tool can be extended transverse to the movement axis in an extension region. With the described device and with the described method, components, in particular sheet steel components, can be shaped in such a way that contours that are oriented in parallel to a movement axis of the tools are particularly well formed. In particular circular shapes can thus be formed with particularly good accuracy. Negative influences of fluctuations of the thickness of the component can be offset. The device and the method are particularly suitable for the production of wheel rims for motor vehicles.

Claims

1. A device for shaping a component, comprising a first tool and a second tool, which can be moved relative to one another along a movement axis to shape a component to be placed between the tools, wherein a surface of the first tool can be extended transverse to the movement axis in an extension region.

2. The device according to claim 1, wherein the surface of the first tool in the extension region is formed parallel to the movement axis.

3. The device according to claim 1, wherein the first tool has a ring which is formed circumferentially around the movement axis and can be extended transverse to the movement axis.

4. The device according to claim 3, wherein the ring is formed adjacent to a hydraulic chamber in such a way that the ring can be extended by increasing a pressure of a hydraulic medium accommodated within the hydraulic chamber.

5. The device according to claim 3, wherein the ring has at least one cooling line.

6. The device according to claim 1, wherein the extension region of the surface of the first tool transitions continuously into adjacent regions in an initial state.

7. A method for shaping a component, comprising: a) placing the component to be shaped between a first tool and a second tool, b) shaping the component by moving the first tool and the second tool relative to one another along a movement axis, and c) further shaping the component by extending the surface of the first tool transverse to the movement axis in an extension region of the surface.

8. The method according to claim 7, wherein the component is shaped in step c) in an edge region.

9. The method according to claim 7, wherein the component is shaped in step c) with a pressure between 50 and 750 bar.

10. The method according to any of claim 7, wherein the extension region of the surface of the first tool is cooled in step c).

11. The device according to claim 2, wherein the first tool has a ring which is formed circumferentially around the movement axis and can be extended transverse to the movement axis.

12. The device according to claim 4, wherein the ring has at least one cooling line.

13. The device according to claim 2, wherein the extension region of the surface of the first tool transitions continuously into adjacent regions in an initial state.

14. The device according to claim 3, wherein the extension region of the surface of the first tool transitions continuously into adjacent regions in an initial state.

15. The device according to claim 4, wherein the extension region of the surface of the first tool transitions continuously into adjacent regions in an initial state.

16. The device according to claim 5, wherein the extension region of the surface of the first tool transitions continuously into adjacent regions in an initial state.

17. The method according to claim 8, wherein the component is shaped in step c) with a pressure between 50 and 750 bar.

18. The method according to any of claim 8, wherein the extension region of the surface of the first tool is cooled in step c).

19. The method according to any of claim 9, wherein the extension region of the surface of the first tool is cooled in step c).

Description

[0053] In the following, the invention and the technical environment will be explained in more detail with reference to the drawings. It should be noted that the invention is not supposed to be limited by the depicted embodiments. In particular, unless explicitly stated otherwise, it is also possible to extract partial aspects from the facts described in the figures and to combine them with other components and insights from the present description and/or the figures. In particular, it must be noted that the figures and in particular the depicted size ratios are only schematic. Identical reference signs denote identical objects, so that explanations from other figures can be used in a supplementary manner, if necessary. In the drawings:

[0054] FIG. 1: is a schematic side sectional view of a device according to the invention,

[0055] FIG. 2: is an enlarged detail of FIG. 1,

[0056] FIG. 3: is a schematic side sectional view of the device from FIG. 1 with a component after shaping, and

[0057] FIG. 4: shows a sequence of a method for shaping a component which can be carried out with the device from FIGS. 1 to 3.

[0058] FIG. 1 shows a device 1 for shaping a component 2. In FIG. 1, the device 1 is shown without component 2. However, a component 2 is shown in FIG. 3. The device 1 comprises a first tool 3 and a second tool 4, which can be moved relative to one another along a movement axis 5 in order to form a component 2 placed between the tools 3, 4. In the state of the device 1 shown in FIG. 1, the component 2 can be placed between the tools 3, 4. The state of the device 1 shown in FIG. 1 can be referred to as an open state. The tools 3, 4 can then be moved toward one another starting from the state shown in FIG. 1, so that the component 2 is shaped and the state shown in FIG. 3 is achieved, which can be referred to as a closed state.

[0059] In the embodiment shown, the first tool 3 is designed as a punch and the second tool 4 as a die. The relative movement between the first tool 3 and the second tool 4 can be realized in the embodiment shown, for example, in that the first tool 3 is moved downward while the second tool 4 is stationary.

[0060] A surface 6 of the first tool 3 can be extended in an extension region 7 transverse to the movement axis 5. For this purpose, the first tool 3 has a ring 8 which is designed to run around the movement axis 5 and which can be extended transverse to the movement axis 5. The ring 8 is formed adjacent to a hydraulic chamber 9 in such a way that the ring 8 can be extended by increasing a pressure of a hydraulic medium accommodated within the hydraulic chamber 9.

[0061] FIG. 2 shows an enlarged view of the region of the device 1 from FIG. 1 that is indicated by a circle. The hydraulic chamber 9 is delimited by the ring 8. The hydraulic chamber 9 is closed off by seals 12 on the ring 8. The ring 8 also has two cooling lines 10. Like the ring 8, the cooling lines 10 are designed to run around the movement axis 5. If a cooling medium is flowing through the cooling lines 10, the component 2 can be cooled in the regions which adjoin the ring 8.

[0062] The surface 6 of the first tool 3 is formed in the extension region 7 parallel to the movement axis 5. The extension region 7 of the surface 6 of the first tool 3 transitions steplessly into adjacent regions in an initial state. The initial state is shown in FIG. 2.

[0063] In FIG. 3, the device 1 from FIGS. 1 and 2 is shown together with a component 2. The tools 3, 4 are moved toward one another along the movement axis 5 to the extent that the tools 3, 4 engage and only leave a gap between them which corresponds to the shape of the shaped component 2. The state of the device 1 shown in FIG. 3 can be referred to as a closed state. In this state, the ring 8 adjoins edge regions 11 of the component 2. By extending the ring 8, the component 2 can be shaped in the edge regions 11.

[0064] The second tool 4, the surface 6 of the first tool 3, the extension region 7 of this surface 6, the ring 8 and the hydraulic chamber 9 are also shown in FIG. 3.

[0065] FIG. 4 shows the schematic sequence of a method for shaping a component 2. The method can be carried out with the device 1 shown in FIGS. 1 to 3. The reference numbers relate to these figures. The method comprises: [0066] a) placing the component 2 to be shaped between a first tool 3 and a second tool 4, [0067] b) shaping the component 2 by moving the first tool 3 and the second tool 4 relative to one another along a movement axis 5, and [0068] c) further shaping the component 2 in an edge region 11 with a pressure between 50 and 750 bar by extending the surface 6 of the first tool 3 transverse to the movement axis 5 in an extension region 7 of the surface 6. In this process, the extension region 7 of the surface 6 of the first tool 3 is cooled.

[0069] With the described device 1 and the described method, components 2, in particular sheet steel components, can be shaped in such a way that contours are formed particularly well and are aligned parallel to a movement axis 5 of the tools 3, 4. In particular, circular shapes can thus be formed with particularly good accuracy. Negative influences of fluctuations of the thickness of the component 2 can be offset. The device 1 and the method are particularly suitable for the production of wheel rims for motor vehicles.

LIST OF REFERENCE SIGNS

[0070] 1 device [0071] 2 component [0072] 3 first tool [0073] 4 second tool [0074] 5 movement axis [0075] 6 surface [0076] 7 extension region [0077] 8 ring [0078] 9 hydraulic chamber [0079] 10 cooling line [0080] 11 edge region [0081] 12 seal