| 摘要 |
PROBLEM TO BE SOLVED: To obtain a formed article free from the generation of wrinkles and scratches at a low cost optimum for limited production with a wide variety in such a manner that the waste of lubricating oil is eliminated at the time of deep drawing by a press. SOLUTION: At the time when a blank set between a punch and die is subjected to deep drawing, in a wrinkle suppression member 5 arranged at the outer circumference of the punch and holding the blank between the same and the die, the upper face 5a is provided with a first oil groove 8 near the inner circumference thereof cocentrically with the inner circumference, and further, spiral second oil grooves 9 communicating with the first oil groove 8 are provided by 8 at the equal portions in the circumference. COPYRIGHT: (C)2006,JPO&NCIPI
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