Aisin-warner Kabushiki Kaisha

Jiro Motomura

Seiichi Nishikawa

Kazuaki Watanabe

Yasuhisa Kamiya

A front cover affixed to the pump impeller of a torque converter, provided with a flat annular flat annular surface to be engaged with the clutch disk of a direct-coupling clutch formed within the torque converter. The flat annular surface is formed in a flat and annular surface having a hard and compact metallographic structure by rolling a rolling tool made of a extremely hard material on the flat annular surface under a pressure and by thus causing plastic deformation of the flat annular surface. An intermediate part of an arcuate section of a small radius is formed between the periphery of said flat annular surface and a connecting part adjacent to the flat annular surface.

Front cover for a torque converter and method of processing the same

A method of grinding an annular surface into a flat annular surface, in which a front cover for a torque converter is formed by means of press-forming and the thus press-formed front cover is supported floatingly on a supporting table and pressed against an annular grinding stone to be ground.

Method of processing a front cover for a torque converter

A fluid torque converter equipped with a direct-coupling clutch comprising a front cover fixed to the pump impeller of the fluid torque converter, and a clutch disk axially slidably mounted on the output shaft of the fluid torque converter and disposed between the front cover and the turbine runner. A friction plate affixed to a friction surface formed on the front cover is divided into two portions, namely, a radially outer portion made of a frictional material having a large coefficient of dynamical friction and a large heat capacity and a radially inner portion made of a frictional material having a large coefficient of statical friction and a high compressive strength.

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Anjo, Japan

Jiro Motomura