Method for processing difficult-to-cut cast iron
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United States of America Patent
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-
Apr 28, 2015
Grant Date -
Aug 30, 2012
app pub date -
Oct 28, 2010
filing date -
Nov 2, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
In a pilot hole of a workpiece made of a difficult-to-cut cast iron, a cutting tool having a leading end to which a cutting insert is attached is inserted to cut the surface of the wall of the pilot hole. At this time, the cutting tool rotates about an axis (α) and also revolves about another axis (β), so that contouring is performed on the workpiece by the tool. The cutting insert is formed of a sintered body having a CBN content of not less than 85% by volume, and the cutting insert has a thermal conductivity of not less than 100 W/(mK).
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