发明名称 |
METHOD OF PREVENTING SAG OF PANEL AND APPARATUS THEREFOR |
摘要 |
<p>A method and apparatus for preventing a sag of a panel, in which a skeleton as well as a plate to be attached thereto are placed on a tentative placing rest, a radiation heating device furnished with heating elements downwards and installed on a holding truck is moved to a position over the plate, the plate is preheated to a predetermined temperature by the heating elements so as to thermally expand it, the radiation heating device is moved away from the position over the plate, the plate is quickly tacked and welded to the skeleton, and a tensile residual stress is developed in the plate owing to a thermal shrinkage deformation attendant upon cooling of the plate.</p> |
申请公布号 |
CA1271800(A) |
申请公布日期 |
1990.07.17 |
申请号 |
CA19860523246 |
申请日期 |
1986.11.18 |
申请人 |
KAWASAKI JUKOGYO KABUSHIKI KAISHA |
发明人 |
SAKAGUCHI, AKIRA;UCHIBE, HISASHI;TANGE, TOSHIYUKI |
分类号 |
B21D1/00;B23K31/02;(IPC1-7):B23K31/02;B21D47/00 |
主分类号 |
B21D1/00 |
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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