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Browse Prior Art Database

Shock Wave Punch

IP.com Disclosure Number: IPCOM000092819D
Original Publication Date: 1967-Mar-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 67K

Publishing Venue

IBM

Related People

Klein, WA: AUTHOR [+2]

Abstract

The apparatus forms or perforates workpiece 1 by generated shock waves. In operation, workpiece 1 is inserted between an aperture die plate 2 and apertured end-closure 5 for pressure cylinder 3. Aperture 6 is intermittently closed by indexed fresh portions of rupturable web 4 of suitable thicknesses of paper, plastic or metal, such as copper and aluminum. Closure 5 also serves as a guide plate which directs the generated shock wave to workpiece 1 and also supports the free portions of web 4 between supply roll 7 and takeup roll 8, both of which are mounted on wave guide plate 5. The latter also supports cross-frame 15 on which cylinder 3 is mounted.

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Shock Wave Punch

The apparatus forms or perforates workpiece 1 by generated shock waves. In operation, workpiece 1 is inserted between an aperture die plate 2 and apertured end-closure 5 for pressure cylinder 3. Aperture 6 is intermittently closed by indexed fresh portions of rupturable web 4 of suitable thicknesses of paper, plastic or metal, such as copper and aluminum. Closure 5 also serves as a guide plate which directs the generated shock wave to workpiece 1 and also supports the free portions of web 4 between supply roll 7 and takeup roll 8, both of which are mounted on wave guide plate 5. The latter also supports cross- frame 15 on which cylinder 3 is mounted.

Die plate 2 supports workpiece 1 and has die cavity 9 disposed adjacent the portion of workpiece 1 to be perforated. Workpiece 1 is located with respect to aperture 6, of guide plate 5, by slidable positioning of die plate 2 on bed plate 10 by micrometers 11 and 12 mounted on stanchions 13 and 14. The latter are fixed to bed plate 10.

After workpiece 1 is properly located, guide plate 5 is lowered, on guide pins 16, into clamping relationship with workpiece 1. Air or other suitable fluid is injected into cylinder 3 through line 17 under controlled rate and pressure by devices such as valve 18 and regulator 19. The pressure is inc reased in cylinder 3 until the portion of web 4 bursts. The generated shock wave forces workpiece 1 against die plate 2. Such action perforates the portion of workpiece 1 di...