JPS5674380A - Method of welding spiral welded steel pipe and its device - Google Patents
Method of welding spiral welded steel pipe and its deviceInfo
- Publication number
- JPS5674380A JPS5674380A JP14947279A JP14947279A JPS5674380A JP S5674380 A JPS5674380 A JP S5674380A JP 14947279 A JP14947279 A JP 14947279A JP 14947279 A JP14947279 A JP 14947279A JP S5674380 A JPS5674380 A JP S5674380A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- spiral welded
- welded steel
- side edge
- forming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
PURPOSE: To produce a spiral welded steel pipe at high efficiency by the use of high frequency heating by exerting pressing force to the steel pipe under forming and welding and forming the butt part to a minus gap style.
CONSTITUTION: One or both of the inside surface tracer 7 of forming and molding equipment and outside surface roll stand 8 are screwed down in the direction of an arrow 12, and a minus gap is given at both side edge surface at the welding point 9 of spiral welded steel pipes. In this state, the end part of the preceding steel pipe 3 heated by the high-frequency power supply device provided just before the welding point 9 and the mutually opposing two side edge faces of a half-molten or molten state of a striplike steel plate 1 are pressure-welded. With this method, the need for lap margin owing to the working of the two side edge faces is eliminated and the high-speed production of the spiral welded steel pipe is made feasible.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14947279A JPS5933069B2 (en) | 1979-11-20 | 1979-11-20 | Welding method and device for spiral welded steel pipes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14947279A JPS5933069B2 (en) | 1979-11-20 | 1979-11-20 | Welding method and device for spiral welded steel pipes |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5674380A true JPS5674380A (en) | 1981-06-19 |
JPS5933069B2 JPS5933069B2 (en) | 1984-08-13 |
Family
ID=15475879
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14947279A Expired JPS5933069B2 (en) | 1979-11-20 | 1979-11-20 | Welding method and device for spiral welded steel pipes |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5933069B2 (en) |
-
1979
- 1979-11-20 JP JP14947279A patent/JPS5933069B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5933069B2 (en) | 1984-08-13 |
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