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Browse Prior Art Database

String Saw

IP.com Disclosure Number: IPCOM000093418D
Original Publication Date: 1967-Sep-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Craig, RM: AUTHOR [+2]

Abstract

The string saw assembly is for making cuts of less than one millinch. There is a slurry feed which establishes a drop of the slurry which is continuously replenished as the tungsten wire is passed through it.

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String Saw

The string saw assembly is for making cuts of less than one millinch. There is a slurry feed which establishes a drop of the slurry which is continuously replenished as the tungsten wire is passed through it.

Nylon block 10 with ramp groove 18 accepts abrasive slurry from continuous band 0-ring 14 and ejects it as a bubble 16 at the corner 18. String saw wire 20,
0.3 mil tungsten, passes through slurry bubble 16. Continuous band 14 is driven over pulleys 22 and 24 by motor 23 to stir abrasive slurry 28 i reservoir 30 and to bring out a fresh supply 12 which is scraped off on nylon block 10 into ramp groove 18.

There is a constant torque motor 26 on one end of the string wire which can be adjusted to establish a given tension on the wire. Motor 26 drives spool 28 on which wire 20 is unreeled and rereeled.

There are translatable idler pulleys 31 and 32 to establish wire 20 accurately in the particular portion of material 36 to be sawed. Wire 20 passes under idler wheels 30...33 to be reeled up on spool 34. Work piece 36 is established in cutting relationship to wire 20 by alignment of substrate 38 by a three-axes goniometer, not shown, and transverse motion of the work piece goniometer assembly.

There is a constant speed motor 40. The latter drives a differential train that is connected to the other end of wire 20 and provides a scale indication of the tension on such wire. Motor 40 drives a differential gear 42 via differential arm
44. another different...