发明名称 |
Method for manufacturing a box-shaped door |
摘要 |
A method for manufacturing a box-shaped door, which comprises the steps of cutting off the four corners of a rectangular metal blank in the square form to provide the four walls of a box body; vertically bending said cutoff four sides by a female die on whose inner wall there are provided in the stepped state an upper bending section and lower shaping section and a male die whose outer wall is shaped complementary to the inner wall of said female die; curvedly shaping the abutting edges of the corners of the four sides of the metal blank, said vertical bending and curved shaping being carried out at the same time; and welding said abutting edges to provide the box body of a box-shaped door.
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申请公布号 |
US4484703(A) |
申请公布日期 |
1984.11.27 |
申请号 |
US19820420840 |
申请日期 |
1982.09.21 |
申请人 |
TOKYO SHIBAURA DENKI KABUSHIKI KAISHA |
发明人 |
KAWASAKI, ISAMU;HAMAZAKI, TAKAKAZU |
分类号 |
B21D51/52;B21D51/16;B21D53/00;F25D23/02;(IPC1-7):B23K31/02 |
主分类号 |
B21D51/52 |
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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