Punch device

Abstract

Referring to a punch device in accordance with the invention, the punch stamp (10) is driven by a hydraulic actuating drive (6), in which case, in connection with an advance device (4) driven by a servo motor and travel-measuring systems on the ram axis and on the partial-apparatus axis (advance axis), the ram movement is freely programmable relative to the advance movement of the partial apparatus.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic side view of a punch device according to the invention.

FIG. 2 is a punch tool of the punch device in accordance with FIG. 1.

FIGS. 3 and 4 show different travel/time curves illustrating the ram movement to be performed with the device according to the invention.

Claims

1. Device for the automatic punching of electric sheets (25), in particular, stator sheets and/or rotor sheets, comprising: a punch tool (11), which includes a punch stamp (10) and a matrix (12);an actuating drive (6), which is connected to the punch stamp (10) in order to adjust said punch stamp to perform the punch stroke in a travel-controlled manner;a travel-measuring device (21) for the detection of the position of the punch stamp (10);an advance device (4) for the controlled movement of the electric sheets (25) relative to the matrix (12); and,a control device (20), which is connected to the actuating drive (6), to the travel-measuring device and to the advance device (4) in order to pre-specify the movement of the punch stamp (10) and of the advance device (4).

2. Punch device in accordance with claim 1, characterized in that the actuating drive (6) is an electric drive.

3. Punch device in accordance with claim 1, characterized in that the actuating drive (6) is an electric servo drive.

4. Punch device in accordance with claim 1, characterized in that the actuating drive (6) comprises a hydraulic cylinder (7) containing a piston which is directly connected to the punch stamp (10).

5. Punch device in accordance with claim 4, characterized in that the hydraulic cylinder (7) and the piston define a maximum stroke which is greater than the punch stroke.

6. Punch device in accordance with claim 5, characterized in that the maximum stroke corresponds to a ventilation stroke, in which case the punch stamp (10) and the matrix are far enough apart from each other, so that the electric sheet (25) can be moved with the use of a gripper means into, or out of, the punch device (1).

7. Punch device in accordance with claim 4, characterized in that the hydraulic cylinder (7) is controlled by way of electrically actuated valves (14, 15).

8. Punch device in accordance with claim 1, characterized in that the control device (20) is set up to vary the punch stroke to be performed by the actuating drive (6) while an electric sheet (25) is being machined.

9. Punch device in accordance with claim 1, characterized in that the control device (20) is set up to vary the lower dead center of the punch stamp (10) while an electric sheet (25) is being machined.

10. Punch device in accordance with claim 1, characterized in that the control device (20) is set up to vary the upper dead center of the punch stamp (10) while an electric sheet (25) is being machined.

11. Punch device in accordance with claim 1, characterized in that the advance device (4) comprises a servo motor (5) that is directly connected to a seat for the electric sheet (25).

12. Punch device in accordance with claim 1, characterized in that the advance device (4) is connected to a travel-measuring device (5a) in order to permit a position-controlled advance movement of the electric sheet (25).