Abrading – Abrading process – Roll – roller – shaft – ball – or piston abrading
Patent
1997-09-15
1999-12-21
Morgan, Eileen P.
Abrading
Abrading process
Roll, roller, shaft, ball, or piston abrading
451 57, 451 59, 451304, 451168, B24B 100
Patent
active
060041897
ABSTRACT:
A tungsten carbide surface is finished to an RMS surface roughness of about 25 nm (1.0 microinch) or less by abrasion using diamond grit particles. The tungsten carbide surface is abraded by a sequence of grit particle-containing abrasive members, such as abrasive films, pastes, or slurries, at least one of the members having an average grit particle diameter of about 2 .mu.m or less. The finish is enhanced by oscillating the abrasive member back and forth over the tungsten carbide surface. A different speed is used for at least two consecutive films in the series, thereby generating scratches at different angles which can be distinguished. A superfinish, corresponding to a lack of visible scratches at 100X magnification, can be obtained by abrading the tungsten carbide surface with a diamond slurry or paste having grit particles with an average diameter of about 1 .mu.m or less.
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Case History of GEM Microfinisher, Grinding Equipment & Machinery Co., Inc., Youngstown, OH, dated prior to Sep. 15, 1997.
Paper entitled "What is a Microfinisher?" from Grinding Equipment & Machinery Co., Inc., Youngstown, OH, dated prior to Sep. 15, 1997.
Imation Corp.
Levinson Eric D.
Morgan Eileen P.
Nguyen Dung Van
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