Method of manufacturing friction plate and apparatus thereof
AssigneeNSK-Warner K.K.
InventorsRikiya Takahashi, Tomoyoshi Tamura
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Abstract
A method of manufacturing a friction plate including a plurality of frictional material segments which are punched into a predetermined shape, and a core plate onto which the plurality of frictional material segments are annularly bonded, comprising step of punching out the frictional material segment in such manner that an edge portion thereof along the predetermined shape is given a punching load earlier than the other portions thereof in the process of punching.
Claims13
A method of manufacturing a friction plate including a plurality of frictional material segments which are punched into a predetermined shape, and a core plate onto which the plurality of frictional material segments are annularly bonded, comprising step of:
- punching out the frictional material segment in such manner that an edge portion thereof along the predetermined shape is given a punching load earlier than the other portions thereof in the process of punching.
A frictional material punching apparatus for punching a frictional material into segments of a predetermined shape comprising:
- a punch;
- and
- a die,
- wherein a punching face of the punch is formed into a predetermined shape, and a protrusion is formed along an outer circumference of the punching face, wherein the shape of said protrusion corresponds with a peripheral predetermined shape of the segment to be punched.
Dependencies are inferred from the claim text.