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Browse Prior Art Database

Trepanning Tool

IP.com Disclosure Number: IPCOM000048935D
Original Publication Date: 1982-Apr-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Semple, WE: AUTHOR

Abstract

Circular parts can be cut from thin, fragile stock by using a trepanning tool with a slurry of abrasive particles.

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Trepanning Tool

Circular parts can be cut from thin, fragile stock by using a trepanning tool with a slurry of abrasive particles.

Referring to the figure, a disc 1 is cut from sheet stock 2, such as silicon, by rotating tool 3 with a cutting surface 4 in contact with the stock. A water-based slurry containing abrasive particles, such as diamond dust, is supplied during the cutting operation. Tool 3 is made of a relatively soft metal having good heat conductivity. The tool material is preferably copper, brass or aluminum and is formed with a large body 5 to serve as a heat sink. Shoulder 6 is made high enough to accommodate a plurality of V-shaped notches 8 that serve to Let the slurry reach the cutting face during rotation of the tool. The tool core 9 is tapered to release the part after cutting is complete.

Stock 2 can be held in a stress-free condition by temporary attachment to to support surface 10 by means of a wax 11. Prior to initiating cutting, abrasive particles are pushed into the cutting surface 4 to insure that the particles are initially present at the workpiece-tool interface. The workpiece can be aligned before cutting by using a tool, such as a center scope, in the spindle of the machine used to rotate the tool.

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