发明名称 |
Apparatus and method for smoothing a welded seam of steel pipe |
摘要 |
A method and apparatus for smoothing a thick walled portion of a steel pipe produced by pressure-welding two opposite longitudinal edges of an open pipe with a squeeze roll after being subjected to induction heating. Outer and inner reduction rollers pressure sandwiches the thick walled portion from the outer and inner surfaces of the pipe, a support supports the inner reduction roller to be rotatable and containing a water passage for cooling water, a connecting rod connects the support device to a coupler and contains a further water passage for feeding cooling water to the water passage, and an anchor holds the connecting rod. In the a method of producing steel pipes two opposite longitudinal edges of the open pipe are preformed before being subjected to the induction heating and thereafter a thick walled portion is smoothed by the above-described apparatus.
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申请公布号 |
US6216511(B1) |
申请公布日期 |
2001.04.17 |
申请号 |
US19980049193 |
申请日期 |
1998.03.27 |
申请人 |
KAWASAKI STEEL CORPORATION |
发明人 |
OHNISHI TOSHIO;KAGAWA MASAHIRO;SUGIE YOSHNORI;SUGANO KOJI;TANAKA NOBUKI;SAWADA KINGO;SHOJI MASAO;TOYOOKA TAKAAKI;HASHIMOTO YUJI;ITADANI MOTOAKI;YORIFUJI AKIRA;NISHIMORI MASANORI |
分类号 |
B21C37/08;(IPC1-7):B21D51/28;B21D1/08;B21B17/02 |
主分类号 |
B21C37/08 |
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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