Cutting insert and indexable rotary cutting tool
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United States of America Patent
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Oct 24, 2017
Grant Date -
Dec 10, 2015
app pub date -
Dec 26, 2013
filing date -
Dec 27, 2012
priority date (Note) -
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Abstract
A cutting insert includes a cutting edge having an involute-curve approximate shape. A cutting edge is formed so as to wholly take on a first curved shape with a first curvature radius when the cutting insert is viewed from the end surface, and is formed so that a large part of the cutting edge takes on a second curved shape with a second curvature radius when the cutting insert is viewed from the side surface.
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