| 摘要 |
PROBLEM TO BE SOLVED: To provide a press working system by which springback is reduced. SOLUTION: This press working system 1 is provided with: a first press device 10 with which draw forming for drawing a steel sheet 12 and straightening forming for performing the press working of the steel sheet 12 through trimming described later are performed; and a second press device 11 with which the trimming for removing unnecessary part by shearing the drawn steel sheet 12 and bending working for bending the press-worked steel sheet 12 are performed. By such a constitution, the steel sheet 12 is beforehand made approximately into a product shape by draw-forming and the unnecessary part is removed by shearing work. After that, the steel sheet 12 which is approximately made into the product shape is formed by the straightening forming. The springback is reduced because the variation of the internal stress of the steel sheet 12 can be reduced after the straightening forming. Thus, it is unnecessary to design the forming surface of a die into the shape expecting the springback and the manufacturing cost of the formed goods is reduced. COPYRIGHT: (C)2008,JPO&INPIT
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