CUTTING TOOL

WIPO Patent Application WO/2018/092184

A9

This cutting tool is provided with a shaft part and multiple blade region groups. The shaft part extends along a central axis and has an outer peripheral surface surrounding the central axis. Multiple blade region groups are provided in a spiraling pattern on the outer peripheral surface. The blade region groups include a first blade region group divided by a first nick. The first blade region group has a first blade region, and a second blade region adjacent to the first blade region with a nick interposed therebetween. The first blade region has a first rake face and a first flank face. The ridge between the first rake face and the first flank face configures a first cutting blade. The second blade region has a second rake face and a second flank face. The ridge between the second rake face and the second flank face configures a second cutting blade. Seen from the direction perpendicular to the plane tangent to the outer peripheral surface, in a state in which the central axis coincides with a first end portion on the front end side of the first blade, the angle of inclination of the first blade from the central axis is greater than the angle of inclination, from the central axis, of the straight line that connects the first end portion, and a second end portion on the front end side of the second blade.

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MATSUDA YUSUKE (JP)
HIGASHI TAISUKE (JP)
KUKINO SATORU (JP)
KANDA TAKASHI (JP)

PCT/JP2016/083799

September 07, 2018

November 15, 2016

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SUMITOMO ELECTRIC HARDMETAL CORP (JP)
SUMITOMO ELECTRIC INDUSTRIES (JP)

B23C5/10

FUKAMI PATENT OFFICE, P.C. (JP)

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