| 摘要 |
PROBLEM TO BE SOLVED: To provide a passing processing method making no bad mark s which impact the surface, even if processing marks appear in a work. SOLUTION: In a passing processing method by a press machine, grooves 13 and 14, parallel to 13, are formed on the pressed out forming line 4 in the work 3, and passing processing is performed by sequent punching out on the grooves 13 and 14 with the punch 1 and the stand 2 placed on the press machine. The passing marks or flash are printed on the bottom of the V grooves, but do not appear on the surface of the work.
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