End mill for cutting of high-hardness materials
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United States of America Patent
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Aug 23, 2016
Grant Date -
Jan 2, 2014
app pub date -
Jan 27, 2012
filing date -
Feb 16, 2011
priority date (Note) -
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Abstract
The present invention relates to an end mill, which comprises a bottom edge, which is composed of an arc-shaped cutting edge that is curved when seen from a direction perpendicular to the tool axis and a linear or curved medium-to-low inclination cutting edge, and a peripheral edge, wherein, when seen from a direction parallel to the tool axis, the arc-shaped cutting edge and a rim at the rearward side of the rotation at a flank of the arc-shaped cutting edge are curved with radii of curvatures, and the radius of curvature of the arc-shaped cutting edge is smaller than the radius of curvature of the rim at the rearward side of the rotation at the flank of the arc-shaped cutting edge.
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