Adjusting Device and Method for Adjusting a Gap Width of a Rotary Punch Device

Abstract

The invention relates to an adjusting device for adjusting the gap width between a punch and counter pressure cylinder of a rotary punch device, comprising an eccentric by means of which the position of a running ring of the counter-pressure cylinder can be adjusted relative to the counter pressure cylinder, and a servomotor which is designed to adjust the gap width between the punch and counter press cylinder. A control device for controlling the servomotor in which an adjusting curve taking into account the eccentricity of the eccentric, is provided. The invention also relates to an associated rotary punch device and to a method for receiving an adjusting curve of an adjusting device and to a method for adjusting a gap width between a punch cylinder and a counter pressure cylinder of a rotary punch machine comprising an adjusting device with an eccentric.

Claims

1.-17. (canceled)

18. An adjusting device for adjusting a gap width between a punch cylinder and a counter pressure cylinder of a rotary punch device, the adjusting device comprising: an eccentric comprising an eccentricity and configured to change a position of a running ring of the counter pressure cylinder relative to the counter pressure cylinder; a servomotor configured to adjust the gap width between the punch cylinder and the counter pressure cylinder; a control device configured to control the servomotor and having an adjusting curve stored therein, wherein the adjusting curve is configured to take into account the eccentricity of the eccentric.

19. The adjusting device according to claim 18, further comprising a position determination unit configured to transmit a position of the eccentric to the control device.

20. The adjusting device according to claim 19, wherein the control device is configured to adjust, upon a change of the gap width by an adjusting width parameter, a control parameter for the servomotor based on the adjusting curve as a function of the position of the eccentric, transmitted by the position determination unit to the control device.

21. The adjusting device according to claim 20, wherein the control device is configured to adjust the control parameter such a gap width adjustment according to the adjusting width parameter is always realized independent of a position of the eccentric.

22. The adjusting device according to claim 18, wherein the servomotor is a step motor.

23. The adjusting device according to claim 22, wherein the control device comprises an encoder configured to record steps of the step motor.

24. The adjusting device according to claim 23, wherein the encoder is configured as a position determination unit.

25. The adjusting device according to claim 18, wherein the eccentric comprises a toothed rim which extends at least halfway circumferentially about the eccentric, wherein the toothed rim is configured to position the eccentric.

26. The adjusting device according to claim 25, further comprising a positioning unit with a toothed wheel interacting with the toothed rim.

27. The adjusting device according to claim 26, further comprising a toothed gear, wherein the toothed wheel is non-rotatably connected to the toothed gear.

28. The adjusting device according to claim 27, wherein the toothed gear is a self-locking worm gear.

29. The adjusting device according to claim 27, wherein the toothed wheel in combination with the toothed gear is configured as a reduction gear for a rotational movement of the servomotor.

30. The adjusting device according to claim 27, wherein the toothed wheel in combination with the toothed rim and the toothed gear is configured as a reduction gear for a rotational movement of the servomotor.

31. The adjusting device according to claim 26, wherein the toothed wheel in combination with the toothed rim is configured as a reduction gear for a rotational movement of the servomotor.

32. A rotary punch device comprising: a punch cylinder rotatable about a punch cylinder axis; a counter pressure cylinder rotatable about a counter pressure cylinder axis; an adjusting device according to claim 1, wherein the gap width between the punch cylinder and the counter pressure cylinder is changeable by the adjusting device, wherein the counter pressure cylinder comprises running rings configured to support the punch cylinder or punch cylinder running rings of the punch cylinder and wherein the eccentric of the adjusting device is configured to change a position of the running rings of the counter pressure cylinder relative to the counter pressure cylinder and relative to the punch cylinder.

33. A method for recording an adjusting curve of an adjusting device according to claim 1, the method comprising: varying a gap width between a punch cylinder and the counter pressure cylinder by a rotation of the eccentric that is configured to change the position of the running ring of the counter pressure cylinder relative to the counter pressure cylinder; measuring the gap width in a plurality of different rotational positions of the eccentric; determining the adjusting curve based on data measured in the step of measuring regarding the different rotational positions of the eccentric and the gap width associated with the rotational positions; and storing the adjusting curve in the control device of the servomotor of the adjusting device.

34. A method for adjusting a gap width between a punch cylinder and a counter pressure cylinder of a rotary punch device with an adjusting device comprising an eccentric, the method comprising: transmitting an adjusting width parameter to a control device of a servomotor of the adjusting device; converting the adjusting width parameter, based on an adjusting curve stored in the control device, into a control signal for the servomotor.

35. The method according to claim 34, further comprising: recording position data of the eccentric with a position determination unit and transmitting the position data to the control device; and converting the adjusting width parameter in the control device as a function of the position data of the eccentric into the control signal for the servomotor.

36. The method according to claim 35, wherein an adjustment of the gap width according to the adjusting width parameter is always realized independent of a position of the eccentric.

Description

[0029] Further advantageous embodiments of the invention will be explained in more detail with the aid of the embodiment described in the following. It is shown in:

[0030] FIG. 1 a counter pressure roll with the adjusting device according to the invention;

[0031] FIG. 2 a cross section of the counter pressure roll according to FIG. 1;

[0032] FIG. 3 a positioning unit of the adjusting device according to the invention;

[0033] FIG. 4 a cross section of the positioning unit according to FIG. 3;

[0034] FIG. 5 an adjusting curve of an article according to the invention.

[0035] In the following, elements of the invention that are acting in the same way are provided with the same reference number. The features of the embodiment described in the following can also be subject matter of the invention in other feature combinations than illustrated.

[0036] FIG. 1 shows a counter pressure cylinder 2 with two running rings 4 whose position relative to the counter pressure cylinder 2 can be adjusted by means of an adjusting device 6, respectively, which each a positioning unit 8, comprising a servomotor 10 and an encoder 12.

[0037] In FIG. 2, the counter pressure cylinder 2 is illustrated in cross section. At both ends of the counter pressure cylinder 2 an adjusting device 6 is arranged in which an eccentric 14 is arranged between counter pressure cylinder 2 and running ring 4. The eccentric 14 comprises a round bore as well as a round outer surface wherein the center points of the circles of the inner bore as well as of the outer circle are displaced relative to each other. Moreover, the positioning units 8 correlated with the adjusting units 6 can be seen.

[0038] The positioning unit 8 is illustrated in FIG. 3. It comprises the servomotor 10 embodied as a step motor as well as the encoder 12, which can be used also as a position determination unit, as well as the toothed wheel 16 which, in operation, is in engagement with the toothed rim of the eccentric 14 and a worm wheel of the worm gear 18 (FIG. 4). The worm gear can be seen in section view through the positioning unit 8 in FIG. 4. In this context, the worm of the worm gear 18 is driven by the servomotor 10.

[0039] For a control of the adjustment that is as much as possible unaffected by the frame construction of a rotary punch device, the support of the counter pressure cylinder 2 is arranged in slide blocks 20 which are slidably arranged within the frame construction.

[0040] An exemplary adjusting curve shows on its X axis the gap width and on its Y axis the number of steps of the step motor required for the adjustment of the gap width, beginning at the zero position at 500 m in one or the other direction (FIG. 5).