Browse Prior Art Database

Electro Erosion cut of Boards

IP.com Disclosure Number: IPCOM000045471D
Original Publication Date: 1983-Mar-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Dampierre, JM: AUTHOR

Abstract

Mechanical methods (e.g., a tool-knife on a hydraulic press or a cutter on a miller) for cutting stacked metal laminates raise a number of problems, such as wire-edges, which could damage any relatively movable mechanical element coming close to the stacked metal element during normal operating conditions.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Electro Erosion cut of Boards

Mechanical methods (e.g., a tool-knife on a hydraulic press or a cutter on a miller) for cutting stacked metal laminates raise a number of problems, such as wire-edges, which could damage any relatively movable mechanical element coming close to the stacked metal element during normal operating conditions.

Electro-erosion means for cutting the stacked metal laminates avoids the wire-edge problem. Such a method is in fact already being used for cutting ferrous or non-ferrous metal sheets. However, no straightforward extension of the process is feasible due to the dielectric characteristics of the glue used to stick non-ferrous (copper) and ferrous sheets together. Assume a disposition of the electro-erosion electrode with respect to the metal stack to be cut and a downward motion of the electrode, as shown in Fig. A. Then the electrode is paralled to the metal sheets and glue layers, which glue acts as an insulator. Extra electric power is required to break the dielectric glue layers, and some burning of metal and possible out of specification surface or dimension might be expected.

However, disposing a wire electrode subjected to transverse motion, as shown in Fig. B, would lead to cutting metal and glue at the same time and would achieve better results.

1

Page 2 of 2

2

[This page contains 4 pictures or other non-text objects]