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Gang Punch for Soft Workpieces

IP.com Disclosure Number: IPCOM000086464D
Original Publication Date: 1976-Sep-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Pearson, ES: AUTHOR

Abstract

In the punching of soft workpieces such as green ceramic sheet material, the punches are subject to wear and must be replaced at frequent intervals. The necessity for resetting the machines for continued accurate punching thereafter is time-consuming and requires long downtime of the machine.

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Gang Punch for Soft Workpieces

In the punching of soft workpieces such as green ceramic sheet material, the punches are subject to wear and must be replaced at frequent intervals. The necessity for resetting the machines for continued accurate punching thereafter is time-consuming and requires long downtime of the machine.

The apparatus illustrated is simple and yet provides for rigid and accurate punching of soft material such as green ceramic sheet, and easy maintenance of the punches for replacement thereof. Referring to Figs. 1, 2 and 3, a plurality of punches 2 located in a row are brought down simultaneously and passed through the workpiece 3. An interposer 4 having a plurality of apertures therein are positioned superimposed of the workpiece 3.

All of the punches 2 in a single row are actuated by comb springs 5 which bear on the individual punches. The punches 2 pass through the punch actuator and guide assembly 6, with the comb springs 5 being mounted on the same assembly. Thus, the comb springs 5 load the punches 2 by pushing them downwardly against the upper portion of the actuator and punch guide 6.

In the elevated position of the punch assembly, all of the punches 2 (which are inserted through the guides) rest with their larger diameter shoulder against the upper surface of the punch guide block 6 (see Fig. 3). The prongs of the comb spring 5 retain the punches 2 against the upper surface of the punch guide
6. As the punch assembly is moved down by an air cylinder 7 (see...