Kabushiki Kaisha F. C. C.

Katsumasa Kiuchi

Shintaro Yagi

There is provided a method for producing a wet friction plate that can improve the retention property of lubricating oils in a fine groove formed by laser light. In a method for producing a wet friction plate (), a friction material () is produced by sheet making processing in a first step. Thereafter, in a second step, a fine groove () is formed on the friction material (). The friction material () is produced such that thermosetting resin therein is in a semi-cured state. The cross-sectional shape of the fine groove () is formed into a V shape by laser light. Subsequently, in a third step, the friction material () is disposed on a core metal () via an adhesive agent including thermosetting resin. Subsequently, in a fourth step, the friction material () is pressed while heated to crush the fine groove (). In this manner, unevenness is formed on an intra-groove surface (), and the thermosetting resin is completely cured.

Method for manufacturing wet friction plate

Provided are a method for manufacturing a wet friction plate, whereby efficiency of the work of forming a fine groove on a friction material can be improved, the wet friction plate, and a wet multiple-plate clutch device having the wet friction plate. In the method for manufacturing a wet friction plate, a core metaland a friction materialare prepared, a resin layeris formed on the core metal, the friction material is attached onto the resin layer, and a fine grooveis formed in the friction material. Specifically, irradiation of a laser beam L is started on an exposed portionof the core metal. A laser headis displaced in an annular shape while continuously emitting the laser beam. Thus, annular fine groovesandare formed in the exposed portion of the core metal and the friction material.

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Shizuoka, Japan

Katsumasa Kiuchi