| 摘要 |
PROBLEM TO BE SOLVED: To draw a cup-shaped product with an inner boss by small-scale equipment. SOLUTION: A boss part 40 is formed by abutting a die 1 and a holding punch 2 on an outer circumferential side of a side surface part 20 and a bottom circumferential part 31 of a bottomed cylindrical body 10 opened from one end side and holding them, pressing an end face 21 of the bottomed cylindrical body 10 by an end face punch 4 in a direction toward the bottom circumferential part 31 from the side surface part 20, and pressing a bottom center part 32 of the bottomed cylindrical body 10 by an inner punch 3 toward the inner circumferential side from the outer circumferential side of the bottomed cylindrical body 10. COPYRIGHT: (C)2005,JPO&NCIPI
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