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Fabricating Small Bored Objects

IP.com Disclosure Number: IPCOM000093671D
Original Publication Date: 1966-Jan-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Gustafson, RM: AUTHOR [+2]

Abstract

A small bored cylinder can be fabricated by etching a line in the flat side of two separate half cylinders. Then, the two half cylinders are joined together along the flat sides to form a cylinder.

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Fabricating Small Bored Objects

A small bored cylinder can be fabricated by etching a line in the flat side of two separate half cylinders. Then, the two half cylinders are joined together along the flat sides to form a cylinder.

A semicircular groove 10 is formed in two half cylinders of carbon or tungsten carbide by electroerosion. The half cylinders 12 of carbide are then plated with a very thin coating 14 of copper. Coating 14 is removed from groove 10 in both the half cylinders and the half cylinders are placed together with grooves 10 facing each other so that together they form a cylinder with centrally-located bore 16.

Steel washers 18 are then placed around half cylinders 12 to hold them in place. The two half cylinders are subjected to sufficient heat to cause copper coating 14 on their flat sides to become brazed together. Then, the steel washers are cut off the fabricated cylinder, and the inside walls of bore 16 are cleaned by lapping to remove any copper ridges that may be formed by the brazing.

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