Method of manufacturing a washer

Details Method of manufacturing a washer Method of manufacturing a washer

F - Mech Eng,Light,Heat,Weapons

16

B

F16B 43/00 (2006.01) B21F 37/04 (2006.01) B21K 1/76 (2006.01)

Patent

CA 2074922

A method of manufacturing a washer which includes the steps of: (a) feeding a metal wire into a die having a bearing face and a through hole which opens to the bearing face so as to permit the metal wire in the through hole to protrude out of the bearing face at a predetermined length; (b) punching the protruded metal wire against the bearing face to form a disc with a punching head which includes a core and a shell; (c) punching the disc to form a central hole on the disc by forcing the core out of said shell and into the through hole; and (d) retracting the punching head to allow the disc to separate from the metal wire.

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