STAMPING TOOL COMPRISING AN UPPER TOOL BODY AND A LOWER TOOL BODY ARRANGED AT A DISTANCE FROM THE UPPER TOOL BODY

Abstract

The invention concerns a stamping tool with a tool upper body, a tool lower body arranged separately from the tool upper body, at least one stamping unit and a guide axis arranged centrally which extends partly through the tool upper body and the tool lower body, wherein the tool upper body is movable relative to the tool upper body and the guide axis guides the movement of the tool upper body.

Claims

1. (canceled)

1. Stamping tool with a tool upper body, a tool lower body arranged separately from the tool upper body, at least one stamping unit and a guide axis arranged centrally which extends partly through the tool upper body and the tool lower body, wherein the tool upper body is movable relative to the tool lower body and the guide axis guides the movement of the tool upper body.

2. Stamping tool according to claim 1 characterised by at least two bolts which are arranged eccentrically and/or extend partly through the tool upper body and the tool lower body.

3. Stamping tool according to claim 2, characterised in that a cross section of the tool upper body and/or the tool lower body is circular with respect to its normal axis and the bolts are arranged radially.

4. Stamping tool according to claim 2, characterised in that the bolts are arranged along a circumference of the tool upper body and/or of the tool lower body with a gap between each.

5. Stamping tool according to claim 2, characterised in that one end of the bolt is connected to a slot nut.

6. Stamping tool according to claim 5, characterised in that the slot nut is arranged in a recess of the tool lower body wherein there is play between the slot nut and a wall adjoining the recess.

7. Stamping tool according to claim 2, characterised by a. a spring which is supported at one end at the end of the bolt away from the slot nut and/or b. a bushing arranged in the tool upper body through which the bolt extends.

8. Stamping tool according to claim 1, characterised in that a. the guide axis is connected solidly to the tool upper body and/or that b. the guide axis can be moved relative to the tool lower body.

9. Stamping tool according to claim 1, characterised in that a. the tool upper body and the tool lower body are arranged coaxially to one another and/or that b. the tool lower body guides the stamping unit.

10. Stamping tool according to claim 1, characterised in that the stamping unit is arranged so that it is offset with respect to the guide axis.

11. Stamping tool according to claim 1, characterised in that the stamping unit has a stamping die and a stamping punch designed separately from the stamping die, wherein a. during a stamping process, the stamping punch exerts a compressive force on the stamping die and/or wherein b. during the stamping process, the stamping punch tensions another spring.

12. Stamping tool according to claim 11, characterised in that the stamping die has a T-shaped stamping head.

13. Stamping tool according to claim 1, characterised in that the tool lower body has a base plate which houses at least one stripper.

14. Stamping tool according to claim 13, characterised in that the stripper is connected non-rotatably with the stamping unit, in particular with the stamping die.

15. Processing machine for the processing of a workpiece and having a tool receptacle in which a stamping tool according to any one of claims 1 to 14 is arranged.

Description

[0024] In the Figures the subject matter of the invention is illustrated diagrammatically, wherein identical elements, or elements with the same effect, are mostly provided with the same reference symbols. They show, in:

[0025] FIG. 1 a lateral cross section of the stamping tool according to the invention,

[0026] FIG. 2 a perspective view of the stamping tool shown in FIG. 1.

[0027] FIG. 1 shows a lateral cross section of a stamping tool 1 according to the invention for stamping a workpiece not shown in the Figures. The stamping tool 1 has a tool upper body 2, a tool lower body 3 arranged with a gap from the tool upper body 2, several stamping units 4 and a guide axis 5 arranged centrally. In particular the guide axis 5 runs coaxially to a central axis M of the stamping tool 1. The guide axis 5 extends partly through the tool upper body 2 and the tool lower body 3. The tool upper body 2 can be moved relative to the tool lower body 3 and the guide axis 5 guides the movement of the tool upper body 2. In this arrangement, in a stamping operation, the tool upper body 2 is moved towards the tool lower body 3.

[0028] With the stamping tool 1 idle, the guide axis 5 also extends through an intermediate space 19 located between the tool upper body 2 and the tool lower body 3. The guide axis 5 is solidly attached, though again releasable in particular, to the tool upper body 2. The solid attachment is achieved by means of a screw connection. The tool lower body 3 has a receptacle 18 to accommodate the guide axis 5. When the tool upper body 2 moves towards the tool lower body 3, the guide axis 5 is moved inside the receptacle 18.

[0029] The tool upper body 2 and the tool lower body 3 are arranged coaxially to one another. Furthermore the guide axis 5 is arranged coaxially to the tool upper body 2 and tool lower body 3.

[0030] The stamping tool 1 has several bolts 6 arranged eccentrically. The bolts 6 are arranged to be axially offset to the guide axis 5 and run parallel to it. One end of the bolt 6 is solidly connected with a slot nut 7. The solid connection is realised by a screw connection. The slot nut 7 is arranged in a recess 8 in the tool lower body 3. The recess 8 is arranged in a radially projecting flange 20 on the tool lower body 3.

[0031] The slot nut 7 and the recess 8 are dimensioned such that there is play between the slot nut 7 and a wall 9 defined by recess 8. In particular there is play between the wall 9 of the recess 8 and the slot nut 7 in the radial direction. Thus, during assembly of the stamping tools 1, the bolt 6 does not become jammed. In the axial direction of the stamping tool 1, that is, in the direction along the central axis M, the slot nut 7 pushes against the recess 8 defining wall 9 of the flange of the tool lower body 2.

[0032] The bolt 6 extends through a bushing 11. The bushing 11 is arranged in the tool upper body 2 and is connected solidly with the tool upper body 2. During a stamping operation, the tool upper body 2 moves relative to the bolt 6. A force is exerted thereby on a spring 10 which is supported at one end on the bolt 6 and at another end on the bushing 11.

[0033] The stamping unit 4 has a stamping punch 13 in the form of a plunger and a stamping die 12. The stamping punch 13 is in direct contact with the stamping die 12, in particular at a T-shaped stamping die head 15.

[0034] The stamping punch 13 and the stamping die head 15 are arranged in a recess in the tool upper body 2. The remaining part of the stamping die 12 of the stamping die head 15 is arranged in the intermediate space and another recess in the tool lower body 3. Thus in a stamping process, the tool lower body 3 serves to guide the stamping units 4, particularly the stamping die 12.

[0035] In addition to the stamping punch 13, another spring 14 is also arranged in the recess of the tool upper body 2. The other spring 14 is supported at one end on the stamping punch 13 and, at another end, on the tool upper body 2. During a stamping operation by one of the stamping units, the other spring 14 is tensioned. Each of the stamping units 4 of the stamping tool 1 is designed identically, as described above.

[0036] On its end away from the tool upper body 2, the tool lower body 3 has a base plate 16. The base plate 16 has openings in each of which a stripper 17 is arranged. The stripper 17 serves to guide the stamping unit 4, in particular the stamping die 12. Furthermore, the stripper 17 prevents the situation where, during a stamping operation, the workpiece not illustrated in the Figures, together with the stamping unit 4, in particular with the stamping die 12, is moved together to a starting position when the stamping unit 4 withdraws. Also, the stripper 17 prevents contamination remaining on the stamping die 12 and therefore entering the stamping tool 1.

[0037] FIG. 2 shows a perspective view of the stamping tool 1 shown in FIG. 1. As can be seen in FIG. 2, the tool upper body 2 and the tool lower body 3 each have an essentially round shape in cross section.

[0038] The stamping tool 1 has six stamping units 4 with are designed as in a revolver. This indicates that the individual stamping units 4 are arranged along a circular line with a gap between each other. In doing so, the stamping units 4 are eccentric, that is, arranged radially separated from the central axis M of the stamping tool. The guide axis 5 is arranged in the area enclosed by the circular line.

[0039] It can also be taken from FIG. 2 that the stamping tool 1 has several bolts 6 which are arranged along the circumference of the tool upper body 2 and/or of the tool lower body 3 with a gap in between each other.

LIST OF REFERENCES

[0040] 1 Stamping tool [0041] 2 Tool upper body [0042] 3 Tool lower body [0043] 4 Stamping unit [0044] 5 Guide axis [0045] 6 Bolt [0046] 7 Slot nut [0047] 8 Recess [0048] 9 Wall [0049] 10 Spring [0050] 11 Bushing [0051] 12 Stamping die [0052] 13 Stamping punch [0053] 14 Other spring [0054] 15 Stamping head [0055] 16 Base plate [0056] 17 Stripper [0057] 18 Receptacle [0058] 19 Intermediate space [0059] 20 Flange [0060] M Central axis [0061] L Longitudinal axis of the stamping unit