O-Oka Forge Co., Ltd.

O-Oka Corporation

Tetsuya Hoguchi

Hiroshi Tsujimoto

Yoshiki Kawasaki

Shigeru Morita

Mitsushige O-Oka

The present invention provides a novel gear product including plural gear members of different tooth profiles and configurations, which are manufactured integrally through forging process. The forged gear product of the invention is compact and light in weight while having a sufficient strength. The gear product includes a clutch spline member with clutch spline teeth and a helical gear member with spiral teeth, which are integrally forged and continuously arranged in the axial direction to be adjacent to each other without any clearance therebetween.

Gear product

A method for machining a clutch gear for the transmission of an automobile which comprises forming a generally round annular bar made of malleable material in a cold forging or hot forging, urging the generally round annular bar against a die to form a final predetermined dimensional cross section and a chamfer projection simultaneously, fine blanking the chamfer projection into a tooth form and pushing the tooth form into a die from an end surface opposite the chamfer projection to form an inverted taper on the tooth form which prevents disengagement of the clutch.

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Toyota, Japan

Tetsuya Hoguchi