Cemented carbide ball end mill
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United States of America Patent
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-
Oct 11, 2005
Grant Date -
Oct 23, 2003
app pub date -
Apr 9, 2003
filing date -
Apr 18, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A cemented carbide ball end mill comprises a cutting portion with a semi-spherical ball portion at a tip thereof. The cutting edge portion has a cutting edge rake face and a chip evacuating flute at the ball portion. An angle formed by a straight line connecting a vertex of the ball portion, where an intersection line passes through, and another end of the intersection line with respect to the central axis, is from 30° to 50°. Further, and angle formed by the rake face and the chip evacuating flute is from 100° to 150°, and a width of the chip evacuating flute is 0.5 to 5 times as large as a radius of the ball portion.
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