RADIUS END MILL, BALL END MILL, AND END MILL
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United States of America Patent
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Issued Date -
Nov 30, 2017
app pub date -
Feb 24, 2016
filing date -
Feb 27, 2015
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Abstract
The present invention includes an end mill body which is formed of ceramic, a chip discharge flute which is formed on an outer periphery of the end mill body, a peripheral cutting edge which is formed on an intersection ridge line between a wall surface facing a tool rotation direction in the chip discharge flute and an outer peripheral surface of the end mill body, an end cutting edge which is formed on an intersection ridge line between the wall surface in the chip discharge flute and a tip surface of the end mill body, and a corner cutting edge which is positioned at a tip outer-peripheral part of the end mill body, connects an outer end of the end cutting edge and a tip of the peripheral cutting edge to each other, and has a convexly curved shape which is convex toward a tip outer-peripheral side of the end mill body.
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