Matsushita Electric Industrial Co., Ltd.

Sumitomo Electric Industries, Limited

Nobuo Yasuhira

Shuji Ueda

Kiyoji Aburaya

Makoto Abe

Yuichiro Kohno

Seiji Nakatani

Makoto Kawanishi

A cutting tool is fixed to a cutting tool holder in such a manner that the posture of the cutting tool can be adjusted without being removed from a processing machine. The cutting tool holder is fixed to a fixing base to allow the cutting tool holder to be fixed in the same position thereof repeatedly with high reproducibility. After the flank of the cutting edge of the cutting tool is measured by an objective interference microscope, the posture of the cutting tool with respect to the cutting tool holder is adjusted so that an interference fringe coincides with a predetermined interference fringe.

Apparatus for setting cutting tool

A spiral end mill which can mill a substantially sharp inside corner of a work surface and attain a stable working accuracy for a long time. The spiral end mill has a hard sintered compact insert portion, a negative relief face a first circular land provided along the outer periphery of the insert portion, and a second circular land on the negative relief face so as to be continuous with the first circular land. The widths of the two circular lands may be the same as or different from each other, and the helix angle of a back line of the second circular land is less than that of the first circular land. A method of manufacturing the spiral end mill involves machining a relief angle in the outer periphery of the insert portion while changing the helix angle between the negative relief face and the rest of the outer periphery.

Spiral end mill and method of manufacturing the same

Method for setting cutting tool

Growing community of inventors

Hirakata, Japan

Nobuo Yasuhira