| 摘要 |
PROBLEM TO BE SOLVED: To provide a drawing method in which reduction of the thickness after drawing is avoided, and a blank need not be partially thickened in advance. SOLUTION: In the drawing method to perform a first drawing step of drawing a first plate part 12 by a first die and a first punch and a second drawing step of drawing a second plate part 14 by a second die 41 and a second punch 42 in this order, a first side 31 of a recessed part 13 formed in the first drawing step is constrained in the second drawing step, and the second plate part is drawn in a non-constrained state. When the first side of the recessed part is constrained in the second drawing step, the first side does not flow in or elongated, and cracking of the recessed part side can be prevented. A recessed part and a projecting part adjacent to the recessed part can be formed by drawing one blank. Since the second plate part is not constrained, flow-in and drawing can be performed, and wrinkling can be prevented. COPYRIGHT: (C)2004,JPO&NCIPI
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