JPS5741809A - Manufacture of upset pipe - Google Patents
Manufacture of upset pipeInfo
- Publication number
- JPS5741809A JPS5741809A JP11699680A JP11699680A JPS5741809A JP S5741809 A JPS5741809 A JP S5741809A JP 11699680 A JP11699680 A JP 11699680A JP 11699680 A JP11699680 A JP 11699680A JP S5741809 A JPS5741809 A JP S5741809A
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- roll
- pipe
- wall thickness
- upset
- 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
- Forging (AREA)
Abstract
PURPOSE: To apply an upsetting process during a rolling process, to simplify the constitution of an upset pipe manufacturing apparatus, and to improve the production efficiency, by installing a rolling-reduction changeable rolling apparatus in the line following a rolling mill of a seamless steel pipe rolling apparatus.
CONSTITUTION: At rolling a blank pipe 11 on a mandrel bar 12 with a roll 5 of a rolling mill into a prescribed wall thickness, the rolling work is performed at first by a roll position and a rolling reduction so as to give a large wall thickness to a length of a prescribed upset zone 14 from the pipe end 13; hereby, an upset zone 14 in a prescribed length with a large wall thickness is formed. Then, the roll position and rolling reduction in each stand are changed so as to give an aimed wall thickness at a point of time wherein the preset length position arrives and the roll is rotated at a relatively higher speed; then, the roll 5 is pressed in a direction for reducing the roll gap; these actions are controlled under a combination with an AGC system based on a gaugemeter. The conditions are next changed so as to open the roll gap of the roll 5, and the similar upset zone is formed in the rear end of the pipe.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11699680A JPS5741809A (en) | 1980-08-27 | 1980-08-27 | Manufacture of upset pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11699680A JPS5741809A (en) | 1980-08-27 | 1980-08-27 | Manufacture of upset pipe |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5741809A true JPS5741809A (en) | 1982-03-09 |
Family
ID=14700884
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11699680A Pending JPS5741809A (en) | 1980-08-27 | 1980-08-27 | Manufacture of upset pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5741809A (en) |
-
1980
- 1980-08-27 JP JP11699680A patent/JPS5741809A/en active Pending
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