| 摘要 |
A method of manufacturing a washer includes the steps of: (a) feeding a metal wire (1) into a die (2) having a bearing face (2') and a through hole (2=) which opens to the bearing face (2') so as to permit the metal wire (1) in the through hole (2=) to protrude out of the bearing face (2') at a predetermined length; (b) punching the protruded metal wire (1') against the bearing face (2') to form a disc (1=) with a punching head (3') which includes a core (4) and a shell (3); (c) punching the disc (1=) to form a central hole on the disc (1=) by forcing the core (4) out of the shell (3) and into the through hole (2=); and (d) retracting the punching head (3') to allow the disc (1=) to separate from the metal wire (1). <IMAGE> <IMAGE> |
