Nissan Motor Company Limited

Yoshirou Noguchi

Kimio Nishimura

Kiyoshi Hasegawa

Toshikazu Nanbu

Yoshitaka Uehara

Hirotaka Miwa

Mitsuo Uchiyama

Takahiro Iwasaki

Shuuji Adachi

Kiyoshi Haseagawa

The present invention is a sliding contact member, including a powder compact portion that contains an electrically conductive diamond and an electrically conductive binder, and is provided at least on a sliding contact surface of either or both of two sliding contact members slidably in contact with each other. The sliding contact members are applied to DC motors, generators and the like.

Sliding contact member, and DC motor and generator using said sliding contact member

A boring cutter body () is inserted into a circular hole () and is rotated and moved in an axial direction, whereby screw-shaped groove parts () are formed by using a tool bit () provided on a tip end of an outer peripheral portion, and broken surfaces () are formed by breaking tips of ridge parts generated by formation of the groove parts (). Moreover, the groove parts () are processed through electric discharge machining using a wire electrode () provided to the boring cutter body () behind the tool bit () in the rotating direction, thereby forming finely roughened portions () having more finely roughened shapes than the broken surfaces ().

Prespray processing method

Growing community of inventors

Yokohama, Japan

Yoshirou Noguchi