PUNCH PRESS

Abstract

The invention relates to a punch press with a crank or eccentric drive, including a crank or eccentric shaft (1a, 1b) and active connecting rods (9a, 9b) for generating the stroke movement of the press ram (13). Furthermore, the punch press includes balancing weights (2a, 2b) for balancing the vertical and horizontal mass forces and is designed in such a way that the horizontal drive movements required for the horizontal mass balancing are tapped directly at the crank or eccentric shaft (1a, 1b), preferably laterally at the crank or eccentric shaft (1a, 1b).

Claims

1. A punch press with a crank or eccentric drive, comprising a crank or eccentric shaft and active connecting rods for generating the stroke movement of the press ram, and with balancing weights for balancing the vertical and horizontal mass forces, wherein the punch press is adapted in such a way that the horizontal drive movements required for the horizontal mass balancing are tapped directly at the crankshaft or eccentric shaft, in particular laterally at the crankshaft or eccentric shaft.

2. The punch press according to claim 1, wherein the punch press is adapted in such a way that the drive movements required for the vertical mass balancing are tapped directly at the crankshaft or eccentric shaft, in particular above the crankshaft or eccentric shaft.

3. The punch press according to claim 1, wherein the punch press is adapted in such a way that the drive movements required for the horizontal mass balancing are tapped via components on the crankshaft or eccentric shaft and are transmitted to the balancing weights, which are formed separately from components serving to drive the ram.

4. The punch press according to claim 1, wherein the punch press is adapted in such a way that all the drive movements required for mass balancing are tapped via components at the crankshaft or eccentric shaft and are transmitted to the balancing weights, which are formed separately from components serving to drive the ram.

5. The punch press according to claim 1, wherein the punch press is adapted in such a way that the drive movements required for the horizontal mass balancing are tapped via auxiliary connecting rods engaging on the crankshaft or eccentric shaft.

6. The punch press according to claim 5, wherein the punch press is adapted in such a way that the auxiliary connecting rods extend from the crankshaft or eccentric shaft in a direction transverse to the intended direction of movement (S) of the press ram.

7. The punch press according to claim 6, wherein the ends of the auxiliary connecting rods facing away from the crankshaft or eccentric shaft are each coupled, in particular articulated, to one end of a pivotably mounted double lever, the second end of which is coupled, in particular articulated, directly or via further coupling members to a balancing weight for horizontal mass balancing.

8. The punch press according to claim 7, wherein the ends of the auxiliary connecting rods facing away from the crankshaft or eccentric shaft are each coupled via a link to the end of the respective pivotably mounted double lever.

9. The punch press according to claim 7, wherein the second end of the respective pivotably mounted double lever is coupled in each case via a link to the respective balancing weight for the horizontal mass balancing.

10. The punch press according to claim 5, wherein the auxiliary connecting rods and the active connecting rods are formed by separate components.

11. The punch press according to claim 5, wherein the auxiliary connecting rods and the active connecting rods are formed by common components.

12. The punch press according to claim 1, wherein the punch press is adapted in such a way that the drive movements required for the vertical mass balancing are tapped via passive connecting rods engaging on the crankshaft or eccentric shaft.

13. The punch press according to claim 12, wherein the punch press is adapted in such a way that the passive connecting rods extend from the crankshaft or eccentric shaft in a direction pointing away from the press ram.

14. The punch press according to claim 13, wherein the ends of the passive connecting rods facing away from the crankshaft or eccentric shaft are each articulated to one end of a pivotably mounted double lever, the second end of which is articulated directly or via further coupling members to a balancing weight for vertical mass balancing.

15. The punch press according to claim 14, wherein the respective balancing weight for the vertical mass balancing is supported by the respective end of the respective double lever.

16. The punch press according to claim 5, wherein the auxiliary connecting rods and the passive connecting rods are formed by common components.

17. The punch press according to claim 5, wherein the auxiliary connecting rods and the passive connecting rods are formed by separate components.

18. The punch press according to claim 5, wherein the auxiliary connecting rods, the passive connecting rods and/or the active connecting rods are mounted on a common crank pin of the crankshaft or on a common eccentric of the eccentric shaft.

19. The punch press according to claim 1, wherein the balancing weights are arranged on both sides of the crankshaft or eccentric shaft for the horizontal mass balancing.

20. The punch press according to claim 1, wherein the press is adapted in such a way that each of the balancing weights serves to balance both horizontal and vertical mass forces.

21. The punch press according to claim 1, wherein the punch press is adapted in such a way that the active connecting rods extend from the crankshaft or eccentric shaft in the direction of the press ram, wherein the ends of the active connecting rods facing away from the crankshaft or eccentric shaft are each articulated to one end of a single-sided lever, the other end of which is mounted in an articulated manner on the housing of the punch press, either directly or via further coupling members, and wherein a thrust shackle, which is connected to the press ram, is articulated to each of the single-sided levers in a region between their two ends.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Further preferred embodiments of the invention result from the dependent claims and from the following description based on the figures. Thereby it is shown in:

[0038] FIG. 1 a vertical section through a punch press according to the invention;

[0039] FIG. 2 a section along the line X-X in FIG. 1;

[0040] FIG. 3 a section along the line Y-Y in FIG. 1;

[0041] FIG. 4 a representation as in FIG. 2 of a variant of the punch press according to the invention.

DETAILED DESCRIPTION

[0042] FIG. 1 shows a vertical section through a punch press according to the invention, in which, in the intended operation, the press ram 13, which is driven by an eccentric drive arranged in the upper part of the press structure 11, works from above against the clamping plate 14 of the press.

[0043] As can be seen in combination with FIG. 2, which shows a horizontal section through the press along the line X-X in FIG. 1, the ram 13 is driven by an eccentric shaft 1a, which has an eccentric bushing 1b for the purpose of adjusting the eccentricity.

[0044] Two pairs of active connecting rods 9a, 9b are arranged on the eccentric bushing 1b, which extend from the eccentric shaft 1a, 1b in the direction of the press ram 13. The ends of the active connecting rods 9a, 9b facing away from the eccentric shaft 1a, 1b are each articulated in pairs to one end of a substantially horizontally extending single-sided lever 10a, 10b, the other end of which is supported in an articulated way on the housing 11 of the punch press.

[0045] A thrust shackle 12a, 12b is articulated to each of the single-sided levers 10a, 10b in the area between the two ends, which is connected to the press ram 13 and moves it up and down in the intended operation.

[0046] In order to keep the vibrations of the punch press as low as possible during operation and to enable a good working result, the press has two balancing weights 2a, 2b arranged on both sides of the eccentric shaft 1a, 1b, which are mounted inside the housing structure 11 of the press and during operation move in the opposite direction to the press ram 13 and to the components of the ram drive 9a, 9b; 10a, 10b; 12a, 12b, so that they balance to a large extent the vertical and horizontal inertial forces generated by these within the press.

[0047] As can be seen in conjunction with FIG. 3, which shows a substantially horizontal section along the line Y-Y in FIG. 1, the drive of the balancing weights 2a, 2b is designed in such a way that the drive movements required for the horizontal and the vertical mass balancing are tapped directly at the eccentric shaft 1a, 1b.

[0048] The drive movements required for the horizontal mass balancing are tapped laterally on both sides of the eccentric shaft 1a, 1b via auxiliary connecting rods 5a, 5b arranged on the eccentric bushing 1b, which extend from the eccentric shaft 1a, 1b in a direction transverse to the intended direction of movement S of the press ram 13.

[0049] The drive movements required for the vertical mass balancing are tapped above the crankshaft or eccentric shaft 1a, 1b via passive connecting rods 3a, 3b arranged on the eccentric bushing 1b, which extend from the eccentric shaft 1a, 1b in a direction pointing away from the press ram 13.

[0050] As can be seen from FIGS. 2 and 3, the auxiliary connecting rods 5a, 5b and the passive connecting rods 3a, 3b are formed by common components, i.e. a passive connecting rod 3a or 3b and an auxiliary connecting rod 5a or 5b are combined to form a common one-piece component. This is implemented in such a way that the eye 16a, 16b on the eccentric shaft side of the respective passive connecting rod 3a, 3b simultaneously also forms the eye on the eccentric shaft side of the associated auxiliary connecting rod 5a, 5b, and that an auxiliary eye 15a, 15b is formed laterally on this eye 16a, 16b, which forms the eye of the respective auxiliary connecting rod 5a, 5b facing away from the eccentric shaft. The active connecting rods 9a, 9b are formed separately from the auxiliary connecting rods 5a, 5b and the passive connecting rods 3a, 3b.

[0051] The ends of the auxiliary connecting rods 5a, 5b facing away from the eccentric shaft 1a, 1b, which are formed by the auxiliary eyes 15a, 15b, are each coupled via a link 8a, 8b to one end of a pivotably mounted double lever 6a, 6b, the second end of which is coupled via a further link 7a, 7b to the lower end of one of the balancing weights 2a, 2b. The arrangement of the links and levers 7a, 8a, 6a, and 7b, 8b, 6b, respectively, is selected in such a way that a horizontal movement of the auxiliary eye 15a, 15b of the respective auxiliary rod 5a, 5b causes an opposite horizontal movement of the respectively associated balancing weight 2a or 2b.

[0052] The punch press is thus designed in such a way that the drive movements required for the horizontal mass balancing are tapped on the eccentric shaft 1a, 1b via components 5a, 5b; 6a, 6b; 7a, 7b; 8a, 8b and transmitted to the balancing weights 2a, 2b, which are designed separately from the components 9a, 9b; 10a, 10b; 12a, 12b, which serve to drive the ram.

[0053] The ends of the passive connecting rods 3a, 3b facing away from the eccentric shaft 1a, 1b, which are each formed by an eye 17a, 17b, are each articulated to one end of a pivotably mounted double lever 4a, 4b, the second, fork-shaped end of which is articulated to the upper end of one of the balance weights 2a, 2b and supports the latter. The arrangement is such that a vertical movement of the eye 17a, 17b of the respective passive connecting rod 3a, 3b causes an opposite vertical movement of the respective associated balancing weight 2a or 2b.

[0054] The punch press is thus also designed in such a way that the drive movements required for vertical mass balancing are tapped via components 3a, 3b; 4a, 4b on the eccentric shaft 1a, 1b and transmitted to the balancing weights 2a, 2b, which are designed separately from the components 9a, 9b; 10a, 10b; 12a, 12b, which serve to drive the ram.

[0055] FIG. 4 shows a section along the line X-X in FIG. 1 for a variant of the punch press according to the invention. This variant differs from the variant according to FIGS. 2 and 3 in that the auxiliary connecting rods 5c, 5d and the passive connecting rods 3a, 3b are formed by separate components.

[0056] Here, the auxiliary connecting rods 5c, 5d and the active connecting rods 9a, 9b are formed by common components, i.e. an active connecting rod 9a or 9b and an auxiliary connecting rod 5c or 5d are combined to form a common one-piece component. This is implemented in such a way that the eye 16 on the eccentric shaft side of the respective passive connecting rod 9a, 9b also forms the eye on the eccentric shaft side of the associated auxiliary connecting rod 5c, 5d, and that an auxiliary eye 15c, 15d is formed laterally on this eye 16, which forms the eye of the respective auxiliary connecting rod 5c, 5d facing away from the eccentric shaft 1a, 1b. The active connecting rods 9a, 9b and also the auxiliary connecting rods 5c, 5d are each formed here as pairs of connecting rods. The passive connecting rods 3a, 3b are formed separately from the active connecting rods 9a, 9b.

[0057] While preferred embodiments of the invention are described in the present application, it should be clearly noted that the invention is not limited to these and may also be carried out in other ways within the scope of the claims which now follow.