| 摘要 |
PROBLEM TO BE SOLVED: To provide a punch in which only parts wearing away due to use in punching work, bending work or pressing work for compacting powder can be replaced easily so as to reduce costs for manufacturing and running the punch and to contribute to reduce costs for manufacturing products by a press consequently. SOLUTION: The edge of the blade of the punch which directly comes in contact with a workpiece or a middle portion connecting the edge of the blade and a punch fitting part is joined by a joining means comprising at least one of a key, a pin, a fit, a shrink fit, a press fit and a screw. The direction of the joining means can be made parallel with or perpendicular to the punching direction. COPYRIGHT: (C)2011,JPO&INPIT
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