JPS5568121A - Manufacture of large size square steel pipe - Google Patents
Manufacture of large size square steel pipeInfo
- Publication number
- JPS5568121A JPS5568121A JP14268178A JP14268178A JPS5568121A JP S5568121 A JPS5568121 A JP S5568121A JP 14268178 A JP14268178 A JP 14268178A JP 14268178 A JP14268178 A JP 14268178A JP S5568121 A JPS5568121 A JP S5568121A
- Authority
- JP
- Japan
- Prior art keywords
- corners
- steel pipe
- square steel
- large size
- degrees
- 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
Abstract
PURPOSE: To cheaply manufacture the large size square steel pipe through the mass production, by cutting the material steel sheet after the straightening work into a specified length, by uniformly cutting both edges, by bending the material at the specified position, by forming the material into approximate square steel pipe, by applying the press work, and by welding the butt joint during the transportation.
CONSTITUTION: The steel sheet is uncoiled from the coil and is straightened with the leveler; after that, the sheet is successively cut into the specified length, and at the same time, both edges are uniformly cut; the bending work is applied by the press to the positions 16W19 equivalent to four corners of the square pipe. The degree of this bending work is specified as follows; the angle A of the corners 16, 19, is made about 92 degrees and the angle C of the corners 17, 18, is made about 115 degrees; and the sheet is formed into an approximate square pipe 13, which is then sent to the forming roll with the conveyer roller; where, the corners 17, 18, are pressed to 90 degrees, and the butt joint is successively welded with the high frequency welder during the transportation. Next, the straightening is carried out by the straightening press, etc., and the large size square steel pipe 14 is obtained. According to this method, the process can be made continuous and simple, and the cost can be reduced.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14268178A JPS5568121A (en) | 1978-11-17 | 1978-11-17 | Manufacture of large size square steel pipe |
US06/093,336 US4301348A (en) | 1978-11-17 | 1979-11-13 | Process for producing large-sized rectangular or square steel pipes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14268178A JPS5568121A (en) | 1978-11-17 | 1978-11-17 | Manufacture of large size square steel pipe |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5568121A true JPS5568121A (en) | 1980-05-22 |
Family
ID=15321038
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14268178A Pending JPS5568121A (en) | 1978-11-17 | 1978-11-17 | Manufacture of large size square steel pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5568121A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102699107A (en) * | 2012-06-19 | 2012-10-03 | 武汉钢铁(集团)公司 | Cold roll forming method of thin-walled and high-strength square steel tube |
CN103286527A (en) * | 2013-03-29 | 2013-09-11 | 常州钢劲型钢有限公司 | Production process for extra-large aperture super wall thickness square steel pipe |
CN103801583A (en) * | 2014-02-13 | 2014-05-21 | 风范绿色建筑(常熟)有限公司 | Machining technique for high-specification directly formed square rectangular pipe |
CN104401404A (en) * | 2014-11-27 | 2015-03-11 | 刘权 | Automobile carriage chassis longitudinal beam |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5051459A (en) * | 1973-09-07 | 1975-05-08 |
-
1978
- 1978-11-17 JP JP14268178A patent/JPS5568121A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5051459A (en) * | 1973-09-07 | 1975-05-08 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102699107A (en) * | 2012-06-19 | 2012-10-03 | 武汉钢铁(集团)公司 | Cold roll forming method of thin-walled and high-strength square steel tube |
CN103286527A (en) * | 2013-03-29 | 2013-09-11 | 常州钢劲型钢有限公司 | Production process for extra-large aperture super wall thickness square steel pipe |
CN103801583A (en) * | 2014-02-13 | 2014-05-21 | 风范绿色建筑(常熟)有限公司 | Machining technique for high-specification directly formed square rectangular pipe |
CN104401404A (en) * | 2014-11-27 | 2015-03-11 | 刘权 | Automobile carriage chassis longitudinal beam |
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