发明名称 |
METHOD OF MANUFACTURING CLOSED-STRUCTURE PART AND APPARATUS FOR THE SAME |
摘要 |
A method manufactures a closed-structure part by forming a flat plate-shaped workpiece into a closed structure including a bottom portion curved along a longitudinal direction. The method includes a first forming step of forming a plurality of first out-of-plane deformed portions and a bent portion, the first out-of-plane deformed portions being formed in a region of the workpiece corresponding to the bottom portion and arranged along the longitudinal direction, each of the out-of-plane deformed portions having a recessed shape or a protruding shape; and a second forming step of squashing the first out-of-plane deformed portions between a pad and a punch such that the region of the workpiece corresponding to the bottom portion is curved and bending bent portions by pressing the punch into a space between dies while the region of the workpiece corresponding to the bottom portion is clamped between the pad and the punch. |
申请公布号 |
US2015101388(A1) |
申请公布日期 |
2015.04.16 |
申请号 |
US201214394192 |
申请日期 |
2012.04.13 |
申请人 |
Higai Kazuhiko;Yamasaki Yuji |
发明人 |
Higai Kazuhiko;Yamasaki Yuji |
分类号 |
B21C37/15;B21D5/01 |
主分类号 |
B21C37/15 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
Tokyo JP |