JPS5739028A - Forming method of blank pipe for electric welded steel pipe - Google Patents
Forming method of blank pipe for electric welded steel pipeInfo
- Publication number
- JPS5739028A JPS5739028A JP11428980A JP11428980A JPS5739028A JP S5739028 A JPS5739028 A JP S5739028A JP 11428980 A JP11428980 A JP 11428980A JP 11428980 A JP11428980 A JP 11428980A JP S5739028 A JPS5739028 A JP S5739028A
- Authority
- JP
- Japan
- Prior art keywords
- rolls
- edge
- forming
- blank pipe
- outside
- 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
Landscapes
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
PURPOSE: To prevent sudden compressive deformation at the edge, and to produce electric welded steel pipes of high quality and good appearnace of the welded part, by forming the outside of the seam edge by a continuous embracing and bearing means.
CONSTITUTION: A steel strip S is successively formed to shape a cylinder by breakdown rolls 1, edge forming rolls 2, outside edge rolls 3 and inside cage rolls 4, and after passing through final outside cage rolls 3e, it is formed to a blank pipe P while being continuously embraced and supported of its seaming edge Pe in the blank pipe P by plural groups of edge guide rolls 6 which are installed between the final outside cage rolls 3e and the No.1 fin pass rolls 5. Therefore the forming of the edge Pe in the blank pipe P just before the No.1 fin pass rolls 5 is made stabilized and the forming load of the No.1 fin pass rolls 5 is reduced.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11428980A JPS5739028A (en) | 1980-08-20 | 1980-08-20 | Forming method of blank pipe for electric welded steel pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11428980A JPS5739028A (en) | 1980-08-20 | 1980-08-20 | Forming method of blank pipe for electric welded steel pipe |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5739028A true JPS5739028A (en) | 1982-03-04 |
JPS6315043B2 JPS6315043B2 (en) | 1988-04-02 |
Family
ID=14634116
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11428980A Granted JPS5739028A (en) | 1980-08-20 | 1980-08-20 | Forming method of blank pipe for electric welded steel pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5739028A (en) |
-
1980
- 1980-08-20 JP JP11428980A patent/JPS5739028A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6315043B2 (en) | 1988-04-02 |
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