| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for easily determining a working shape when performing drawing of a perforated metal sheet. SOLUTION: This invention relates to a method of plastically working the perforated metal sheet, in which the perforated metal sheet obtained by applying punching to a soft steel sheet, is subjected to drawing, and the method comprises a process where the height of drawing setting in the range which is not more than 50% of the limit height of drawing of the soft steel sheet which is not punched is taken as a first condition, the shape conditions such as the dimensions of a bending radius and the angle of a slope which need to be considered when drawing a high-tension steel sheet are taken as a second condition and, on the basis of these first condition and second condition, drawing is applied to the perforated metal sheet by using a press. COPYRIGHT: (C)2009,JPO&INPIT
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