| 摘要 |
PROBLEM TO BE SOLVED: To provide a punch for a press die wherein slug floating is prevented. SOLUTION: The punch 1 for a press die is provided with: an edge section 2 for opening holes into a workpiece; a shank 3 with a diameter larger than the edge section 2; and a collar section 4 with a diameter larger than the shank 3, which are formed together side by side in this sequence. An approximately cross-shaped groove 6 at a plain view is formed on the head surface 5 of the edge section 2 so as to pass through a side face 8 of the edge section 2. COPYRIGHT: (C)2005,JPO&NCIPI
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