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Method of Grinding

IP.com Disclosure Number: IPCOM000077105D
Original Publication Date: 1972-Jun-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Bement, RA: AUTHOR

Abstract

This method of grinding wear resistant materials, such as chrome oxide, titanium dioxide and nickel phosphorous, produces a finish of four microinches or better.

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Method of Grinding

This method of grinding wear resistant materials, such as chrome oxide, titanium dioxide and nickel phosphorous, produces a finish of four microinches or better.

Excess material is initially removed by the use of a silicone carbide grinding wheel, while using an oil-soluble or semisynthetic coolant. The wheel speed is controlled so that the surface speed at the grinding interface is well below the normal speed for such a wheel, for example 3,000 surface feet per minute is used. During this initial grinding, the wheel is fed into the work piece at a rate of
0.0002 to 0.0005 inch per pass of the wheel. This initial grinding procedure is maintained until the work piece is ground to within 0.002 to 0.005 inch of the final dimension.

The remaining material is removed by the use of a vibration transducer which is mounted on the work piece and connected to an oscilloscope. The wheel is manually fed into the work piece until observation of the oscilloscope shows that the wheel has just touched the high spots left by the initial grinding. Thereafter, the additional material is removed by using the initial slow-surface speed. The rate of infeed is decreased to 0.0001 to 0.00005 inch per pass of the wheel. The particular rate of infeed is selected while observing the oscilloscope pattern. Specifically, the amplitude of the transducer output should be minimized, while at the same time removing material on each pass of the wheel.

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