JPS56111589A - Tack arc welding method in pipe making process for spiral steel pipe - Google Patents
Tack arc welding method in pipe making process for spiral steel pipeInfo
- Publication number
- JPS56111589A JPS56111589A JP1298980A JP1298980A JPS56111589A JP S56111589 A JPS56111589 A JP S56111589A JP 1298980 A JP1298980 A JP 1298980A JP 1298980 A JP1298980 A JP 1298980A JP S56111589 A JPS56111589 A JP S56111589A
- Authority
- JP
- Japan
- Prior art keywords
- tack
- welding
- pipe
- clock
- sheet steel
- 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.)
- Pending
Links
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
PURPOSE: To enable high quality tack arc welding to be accomplished efficiently in a pipe making process for spiral steel pipes by down-welding the edge joining part of a sheet steel from both sides in the positions of 8 o'clock W 10 o'clock.
CONSTITUTION: A hot-rolled coil 1 is uncoiled to a strip shape to make a striplike sheet steel 2. After both edge parts thereof are worked to a required width, the sheet steel is fed into a forming part 4 by pinch rolls 3, and is formed to a required curvature by forming rolls 5. Thence, the joining in both edge parts of the sheet steel 2 are tack-welded from both inside and outside by an inside welding device 6 and an outside welding device 8 between 8 o'clock W 10 o'clock towared the upper stream side of the pipe 7 to be formed. If in this case the inside surface is first tack-welded by slightly shifting the weld positions upward or downard, penetration is effected by the outside welding on account of preheating effect. The pipe 7 having undergone this tack welding is subjected to regular welding in another line.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1298980A JPS56111589A (en) | 1980-02-07 | 1980-02-07 | Tack arc welding method in pipe making process for spiral steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1298980A JPS56111589A (en) | 1980-02-07 | 1980-02-07 | Tack arc welding method in pipe making process for spiral steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56111589A true JPS56111589A (en) | 1981-09-03 |
Family
ID=11820608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1298980A Pending JPS56111589A (en) | 1980-02-07 | 1980-02-07 | Tack arc welding method in pipe making process for spiral steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56111589A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120261387A1 (en) * | 2009-10-28 | 2012-10-18 | Salzgitter Mannesmann Grossrohr Gmbh | Method for producing welded helical- seam tubes having optimized tube geometry |
-
1980
- 1980-02-07 JP JP1298980A patent/JPS56111589A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120261387A1 (en) * | 2009-10-28 | 2012-10-18 | Salzgitter Mannesmann Grossrohr Gmbh | Method for producing welded helical- seam tubes having optimized tube geometry |
| US8941023B2 (en) * | 2009-10-28 | 2015-01-27 | Salzgitter Mannesmann Grossrohr Gmbh | Method for producing welded helical-seam tubes having optimized tube geometry |
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