发明名称 |
Method and apparatus for making an electric resistance welded tube |
摘要 |
A conductor is installed along a Vee-angle part of a tube to be welded for producing an electric welded tube by high frequency resistance or induction welding. The conductor is set closely above the Vee-angle part. A high-frequency current having about the same phase as a phase of a high-frequency current for welding is supplied to the conductor. This controls the distribution of the current density on mating surfaces of Vee-angle part so that the welding current does not concentrate in the upper and lower edges of the tube, thus making uniform the current density and heating in the Vee-angle part.
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申请公布号 |
US4456803(A) |
申请公布日期 |
1984.06.26 |
申请号 |
US19820381782 |
申请日期 |
1982.05.25 |
申请人 |
NIPPON KOKAN KABUSHIKI KAISHA;NICHIDEN KOSHUHA KABUSHIKI KAISHA |
发明人 |
KANEDA, FUMIO;MAEIKE, TADAHIRO |
分类号 |
B23K11/08;B23K13/02;B23K13/08;(IPC1-7):H05B6/40;B23K31/06 |
主分类号 |
B23K11/08 |
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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