发明名称 |
Press forming process and apparatus therefor |
摘要 |
A press forming process is composed of a step of removing wrinkles of the surface of a curved elongate flat sheet metal workpiece which has been prepared by a so-called edge bending process. The wrinkle removing step is carried out prior to a U-shape bending step in which the workpiece is bent to have a U-shaped cross-section in order to obtain an curved elongate channel-shaped article, thereby improving the quality of the resulting article while preventing press dies from being damaged.
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申请公布号 |
US4590783(A) |
申请公布日期 |
1986.05.27 |
申请号 |
US19850693986 |
申请日期 |
1985.01.23 |
申请人 |
NISSAN MOTOR CO., LTD. |
发明人 |
TANAKA, HIROSHI;MITANI, SOTOZI;SAKURAI, YASUSHI |
分类号 |
B21D13/00;B21D5/01;B21D13/02;(IPC1-7):B21D17/02 |
主分类号 |
B21D13/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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