Jaw pair for punching out holes

Patent metadata

Field	Value
Publication number	US-9808853-B2
Application number	US-201214235879-A
Country	US
Kind code	B2
Filing date	Jul 27, 2012
Priority date	Aug 2, 2011
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

The invention relates to a jaw pair for punching out holes or recesses, preferably in sheet metal parts, the jaw pair being connectable to a device ( 23 ) to be operated preferably hydraulically and being designed, for example, as a pivoting jaw pair, wherein a punch ( 8 ) is formed on one jaw and a punching opening ( 6 ) is formed on the other jaw. To provide an advantageous jaw pair for punching out holes or recesses, preferably in sheet metal parts, it is proposed that a stripper part ( 10 ) which is situated outside of an outer contour of the punch ( 8 ) in the punching direction is formed in the jaw having the punch ( 8 ) and is movable in relation to the punch ( 8 ).

First claim

The invention claimed is:

1. A jaw pair configured to punch holes or recesses in a workpiece, the jaw pair being connectable to a device, comprising:
a first jaw having a punching opening formed thereon;
a second jaw moveable relative to the first jaw;
a mount extending from the second jaw, the mount being formed of a body having a plate extending outwardly from the body, the plate having a dimension which is larger than the body;
a punch extending from the plate of the mount, the punch formed from a wall having first and second ends and an outer contour extending between the first and second ends, the second end of the punch defining a punch tip;
a stripper part comprising a side wall having first end and an opposite second end and a bottom wall at the first end of the side wall, the bottom wall having an opening therethrough, the bottom wall extending behind the first end of the punch, the plate of the mount seated within the opening in the bottom wall, the second end of the side wall forming an opening, the side wall surrounding the outer contour of the punch and the punch configured to extend through the opening formed by the second end of the side wall, the stripper part being moveable relative to the punch and relative to the mount; and
a spring having a first end and an opposite second end, the first end of the spring engaging the second jaw, and the second end of the spring configured to be engaged with the bottom wall of the stripper part and configured to be engaged with the plate of the mount, the spring being configured to bias the stripper part toward the punching opening, the stripper part being moveable relative to the punch and relative to the mount to compress the spring, wherein the second end of the spring engages with the plate of the mount and the bottom wall of the stripper part in a first position, and the second end of the spring engages with the bottom wall of the stripper part and does not engage with the plate of the mount in a second position.

2. The jaw pair according to claim 1 , wherein a front edge of the stripper part is biased by the spring into a position protruding at least partially beyond the punch tip of the punch.

3. The jaw pair according to claim 2 , wherein the spring surrounds the body of the mount.

4. The jaw pair according to claim 1 , wherein the spring surrounds the body of the mount.

5. The jaw pair according to claim 1 , wherein the punching opening has a metal insert mounted therein configured to receive the punch therein.

6. The jaw pair according to claim 1 , further including a vertical handle, and wherein the first and second jaws are formed differently, the second jaw having an angled shape in a side view which is formed by a first generally horizontal portion extending from the handle and a second generally vertical portion extending from the first generally horizontal portion.

7. The jaw pair according to claim 1 , in combination with a hydraulically operated device, the device being connected to the jaw pair.

8. The jaw pair according to claim 1 , wherein the mount is separately formed from the second jaw and attached thereto.

9. The jaw pair according to claim 1 , wherein the second jaw is pivotally connected to the first jaw.

10. The jaw pair according to claim 1 , wherein the second jaw is slidably connected to the first jaw.

11. The jaw pair according to claim 1 , wherein the punch is separately formed from the mount and attached to the mount.

12. The jaw pair according to claim 11 , wherein the mount includes an opening into which a fastener is secured, the fastener securing the punch to the mount.

13. The jaw pair according to claim 11 , wherein the mount includes a protrusion to which the punch is attached.

14. The jaw pair according to claim 13 , wherein the protrusion is threaded and the punch is threadedly attached thereto.

15. The jaw pair according to claim 1 , wherein the mount is separately formed from the second jaw and attached thereto, and the punch is separately formed from the mount and attached to the mount.

16. The jaw pair according to claim 15 , wherein the mount includes an opening into which a fastener is secured, the fastener securing the punch to the mount, the fastener being detachable from the mount to detach the punch from the mount.

17. The jaw pair according to claim 15 , wherein the mount includes a protrusion to which the punch is configured to be attached and configured to be detached.

18. The jaw pair according to claim 1 , wherein the punch is detachable from the mount, and wherein the second end of the spring is engaged with the plate of the mount when the punch is detached from the mount.

19. The jaw pair according to claim 18 , wherein the mount includes an opening into which a fastener is secured, the fastener securing the punch to the mount, the fastener being detachable from the mount to detach the punch from the mount.

20. The jaw pair according to claim 18 , wherein the mount includes a protrusion to which the punch is configured to be attached and configured to be detached.

Assignees

• Frenken Egbert
• Klauke Gmbh Gustav

Inventors

• Frenken Egbert

Classifications

• B26F1/34 Primary

  power actuated (details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00) · CPC title

• B21D45/006 Primary

  Stripping-off devices · CPC title

• B26F1/12

  to notch margins of work · CPC title

• B21D28/34

  Perforating tools; Die holders · CPC title

• B26D7/1818

  by pushing out · CPC title