发明名称 |
Profile element pipe for hydraulic bulging, hydraulic bulging device using the element pipe, hydraulic bulging method using the element pipe, and hydraulically bulged product |
摘要 |
According to a bulging device and a bulging method using a profile element pipe, for example, even when a profile steel pipe having a cross sectional shape varying in the axial direction as in a tapered pipe is hydraulically bulged, a bulging in which an internal pressure loading and an axial pressing are combined with each other can be performed to provide a larger expansion ratio than a conventional case and a joining and socket connection thereof to the other part can also be easily performed.
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申请公布号 |
US7827839(B2) |
申请公布日期 |
2010.11.09 |
申请号 |
US20070003389 |
申请日期 |
2007.12.21 |
申请人 |
SUMITOMO METAL INDUSTRIES, LTD.;SUMITOMO PIPE AND TUBE CO., LTD.;MITSUBISHI JIDOSHAKOGYO KABUSHIKI KAISHA |
发明人 |
TOMIZAWA ATSUSHI;KOJIMA MASAYASU |
分类号 |
B21D39/08 |
主分类号 |
B21D39/08 |
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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