JPS5647213A - Manufacture of thick-walled steel pipe - Google Patents
Manufacture of thick-walled steel pipeInfo
- Publication number
- JPS5647213A JPS5647213A JP12313679A JP12313679A JPS5647213A JP S5647213 A JPS5647213 A JP S5647213A JP 12313679 A JP12313679 A JP 12313679A JP 12313679 A JP12313679 A JP 12313679A JP S5647213 A JPS5647213 A JP S5647213A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- burr
- thick
- pipe
- 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
- Bending Of Plates, Rods, And Pipes (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
PURPOSE: To prevent the generation of cracks at the end face of the steel plate undergoing the bending work, by previously removing the burr from the sheared edge of the plate before forming into the pipe, at manufacturing the steel pipe with the specified thick wall.
CONSTITUTION: At manufacturing the thick-walled steel pipe with the wall thickness shown by t/2R>2% (where, (t) is for the wall thickness, and R is for the neutral radius of the thick wall), the steel plate is sheared and is cold formed into the steel pipe; hereupon, only the burr on the side where the outer surface of the steel pipe coincides with the burr, is cut off or ground off. The removing process for the burr can be attained by only the chamfering work or by cutting off the whole edge. Besides, as the removing method, either one of the machine cut, the gas cutting, etc., can be employed. By the present method, the crack to be generated at the pipe end is perfectly prevented, so that the quality of the steel pipe is improved.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12313679A JPS5647213A (en) | 1979-09-27 | 1979-09-27 | Manufacture of thick-walled steel pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12313679A JPS5647213A (en) | 1979-09-27 | 1979-09-27 | Manufacture of thick-walled steel pipe |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5647213A true JPS5647213A (en) | 1981-04-28 |
Family
ID=14853069
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12313679A Pending JPS5647213A (en) | 1979-09-27 | 1979-09-27 | Manufacture of thick-walled steel pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5647213A (en) |
-
1979
- 1979-09-27 JP JP12313679A patent/JPS5647213A/en active Pending
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