Browse Prior Art Database

Flexpunch Machine

IP.com Disclosure Number: IPCOM000034349D
Original Publication Date: 1989-Feb-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Benzell, BA: AUTHOR [+5]

Abstract

A technique is described whereby a flexpunch machine provides the ability to punch via holes in multi-level circuit cards (MLCs) utilizing a single tool set, whereby only one via punch operation is needed to punch an entire via pattern of the circuit card. The punching is performed on the fly through the use of a magneto-repulsive punching technique. In addition, the flexpunch machine is an improvement over prior art in that it reduces the long lead time required, from development to production, which required customized punch and die sets. The flexpunch machine consists of five major components as shown in the figure: Two green sheet carriers 10; Punch and die assembly 11; Positioning system 12; Hole verifier 13; and Controller 14.

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Flexpunch Machine

A technique is described whereby a flexpunch machine provides the ability to punch via holes in multi-level circuit cards (MLCs) utilizing a single tool set, whereby only one via punch operation is needed to punch an entire via pattern of the circuit card. The punching is performed on the fly through the use of a magneto-repulsive punching technique. In addition, the flexpunch machine is an improvement over prior art in that it reduces the long lead time required, from development to production, which required customized punch and die sets. The flexpunch machine consists of five major components as shown in the figure: Two green sheet carriers 10; Punch and die assembly 11; Positioning system 12; Hole verifier 13; and Controller 14. Green sheet carriers 10 are used to accurately position blank MLC sheets during the punching operation. Each carrier 10 includes a fixture which holds a multiple number of green sheets in a two-by-two array. Two carriers are provided so that one carrier can be loaded while the other is engaged in the punching operation. Punch and die assembly 11 includes multiple punch and die sets precisely positioned so as to match the two-by-two array of green sheet carriers 10. Each green sheet is stretched over a square opening in a sheet fixture. This allows the sheets to pass between the punch and die as sheet carrier 10 and punch and die assembly 11 move into punching position. Positioning system 12 is equipped with three cartridges for planes X, Y and Z. Planes X and Z share a common axis bearing. Green sheet carriers 10 are transported along the X axis to align with punch and die assembly 11 which is mounted on the Y carriage. Once aligned, the Y carriage transports punch and die assembly 11 along the Y axis into the punching area. Punching data is loaded from controller 14 so as to enable carriages 10 to move to the desi...