| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that a semi-finished product halfway drawn to the back face side in a previous stage is inclined in the subsequent stage to bring only a part of a peripheral wall of the semi-finished product into contact with a lower die, and if the next drawing is performed in the inclined state, the finished drawn product is subjected to uneven thickness and deformation. SOLUTION: The first drawing and the drawing in the subsequent stages are performed with a metallic material in a horizontal state. A lower die in the first drawing stage is arranged above a lower die in the subsequent drawing stage, and the metallic material is held horizontally in the first drawing stage and the subsequent stages. COPYRIGHT: (C)2007,JPO&INPIT
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