CN1079680A - A kind of method of making square pipe with sharp corners - Google Patents
A kind of method of making square pipe with sharp corners Download PDFInfo
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- CN1079680A CN1079680A CN 93104319 CN93104319A CN1079680A CN 1079680 A CN1079680 A CN 1079680A CN 93104319 CN93104319 CN 93104319 CN 93104319 A CN93104319 A CN 93104319A CN 1079680 A CN1079680 A CN 1079680A
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- square pipe
- weld seam
- sharp corners
- sharp
- making square
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Abstract
The present invention relates to a kind of method for production of square pipe with sharp corners.Its adopts the collection skin decide the clod wash straight forming method of moving in bending radius, the flexural center and high frequency electric, close on, attract, the principle of mutual inductance by force, with steel plate be welded into have only a weld seam and angle be 90 ° wedge angle rectangular tube.This method for production is simple, and is easy to operate, need not increase the aligning operation, and the product surface of producing is attractive in appearance, and a weld seam is only arranged.Raw material have been saved in the weight saving of workpiece.Radius R≤the 7mm of sharp corner.
Description
The present invention relates to a kind of processing molding method of rectangular tube, be adapted to make the rectangular tube that a wedge angle is only arranged especially.
At present, when making square pipe with sharp corners, adopt two channel-section steel butt welding to form mostly.Adopt the deficiency of this kind moulding to be: because butt welding makes the rectangular tube internal stress imbalance after the welding, it is big, undesirable to produce the buckling degree, needs like this to increase align operation; Weld seam is two roads, not only increase operation, and it is attractive in appearance to influence surface of the work; Because of workpiece big from weight; So the steel consumption amount is also more.
The object of the present invention is to provide a kind of weld seam road number only is that the workpiece light self-weight need not take to align operation, and is simple to operate together, easily the method for the making square pipe with sharp corners of row.
The object of the present invention is achieved like this.Shifting method adopts eccentric straight forming in bending radius, the flexural center according to deciding, and weld seam is arranged on sharp corner, adopts HFI welding.For making welding current collect in weld, guarantee welding quality, for this reason, when welding, make the closed line of eccentric single turn induction coil become parallel shape with weld seam, distance between the two can not be greater than 8mm.
In order further to guarantee welding quality to make welding current concentrate on weld more equably, so at outer setting high frequency electric magnetic conduction bar magnet near the weld seam induction coil.
The product that adopts the present invention to produce is satisfying requirement of strength, reaches under the situation of same result of use, has reduced by one weld seam and has saved the energy, and do not adopted the aligning operation, has alleviated people's labour intensity, increases work efficiency.The workpiece weight that the workpiece deadweight forms with two channel-section steel butt welding can alleviate 6.6kg for every meter, has saved raw material, and the sharp corner radius R≤7mm of the wedge angle rectangular tube of producing has satisfied customer requirements.
Drawing is described as follows:
Fig. 1 is the sectional view of wedge angle rectangular tube.
Fig. 2 is the eccentric cold roll forming figure of wedge angle rectangular tube.
The invention will be further described below in conjunction with accompanying drawing:
To carry out eccentric cold bending step as follows according to deciding in bending radius, the flexural center shifting method:
1, as requested, measure the length of tube wall 1,2,3,4 respectively;
2, find out the center line of tube wall 2;
3, with cold bending molding equipment earlier with tube wall 4 by 25 °, 50 °, bend to 75 ° successively;
When 4, tube wall 3 being bent to 75 ° successively by 15 °, 30 °, 45 °, 60 °, 70 °, bend to 85 ° again up to 90 ° by 75 ° simultaneously to managing 3,4;
5, tube wall 1 is crooked successively equably up to 90 ° since 0 ° of branch 9 times;
6, with medial surface vertical weld of ground, the cross section of tube wall 4 with tube wall 1, its welding method is as follows:
At first the workpiece with cold roll forming places in the eccentric single turn induction coil of coiled, and distance between the two is 6mm, and makes the closure place of induction coil become parallel position relationship up and down with axis of a weld.Hold high frequency electric magnetic conduction bar magnet in outside with shelf again,, weld so that high frequency electric further is concentrated in the commissure equably near tube wall 1 induction coil.Radius R for sharp corner is 1mm.
Claims (2)
1, a kind of method of making square pipe with sharp corners, it is characterized in that shifting method adopts eccentric straight forming in bending radius, the flexural center according to deciding, weld seam is located at sharp corner, adopt HFI welding, during welding, make the closed line of eccentric single turn induction coil become parallel shape with the weld seam center of square pipe with sharp corners, distance between the two is less than 8mm.
2, a kind of method of making square pipe with sharp corners according to claim 1 is characterized in that at the outer setting high frequency electric magnetic conduction bar magnet near the weld seam induction coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93104319 CN1039523C (en) | 1993-04-21 | 1993-04-21 | method for manufacturing square pipe with sharp corners |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93104319 CN1039523C (en) | 1993-04-21 | 1993-04-21 | method for manufacturing square pipe with sharp corners |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1079680A true CN1079680A (en) | 1993-12-22 |
| CN1039523C CN1039523C (en) | 1998-08-19 |
Family
ID=4985137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93104319 Expired - Fee Related CN1039523C (en) | 1993-04-21 | 1993-04-21 | method for manufacturing square pipe with sharp corners |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1039523C (en) |
Cited By (8)
| 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 |
| CN103567261A (en) * | 2012-07-18 | 2014-02-12 | 邵国海 | Bending manufacturing method of metal plate |
| CN104401404A (en) * | 2014-11-27 | 2015-03-11 | 刘权 | Automobile carriage chassis longitudinal beam |
| CN107030135A (en) * | 2017-06-16 | 2017-08-11 | 武汉钢铁江北集团有限公司 | A kind of double pointed angle square tube forming method of high-strength thick light section |
| CN107983811A (en) * | 2017-11-30 | 2018-05-04 | 武汉钢铁江北集团有限公司 | A kind of roll bending formation method of D-shaped steel pipe |
| CN108453153A (en) * | 2018-05-03 | 2018-08-28 | 石家庄富瑞沃机电设备有限公司 | A kind of roll device and forming method of square tube straight forming |
| CN112588896A (en) * | 2020-12-18 | 2021-04-02 | 武汉钢铁江北集团冷弯型钢有限公司 | Forming method of asymmetric pentagonal thin-wall cold-formed steel pipe with sharp corners |
| CN114290004A (en) * | 2022-01-12 | 2022-04-08 | 济南方圆制管有限公司 | Preparation process of sharp-angled square tube for outer cantilever of tower crane |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106583492A (en) * | 2017-01-03 | 2017-04-26 | 昆明理工大学 | Continuous roller type cold bending forming method for sharp-angled rectangular tube |
-
1993
- 1993-04-21 CN CN 93104319 patent/CN1039523C/en not_active Expired - Fee Related
Cited By (10)
| 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 |
| CN102699107B (en) * | 2012-06-19 | 2014-12-10 | 武汉钢铁(集团)公司 | Cold roll forming method of thin-walled and high-strength square steel tube |
| CN103567261A (en) * | 2012-07-18 | 2014-02-12 | 邵国海 | Bending manufacturing method of metal plate |
| CN104401404A (en) * | 2014-11-27 | 2015-03-11 | 刘权 | Automobile carriage chassis longitudinal beam |
| CN107030135A (en) * | 2017-06-16 | 2017-08-11 | 武汉钢铁江北集团有限公司 | A kind of double pointed angle square tube forming method of high-strength thick light section |
| CN107030135B (en) * | 2017-06-16 | 2019-04-23 | 武汉钢铁江北集团冷弯型钢有限公司 | A kind of double pointed angle square tube forming method of high-strength thick light section |
| CN107983811A (en) * | 2017-11-30 | 2018-05-04 | 武汉钢铁江北集团有限公司 | A kind of roll bending formation method of D-shaped steel pipe |
| CN108453153A (en) * | 2018-05-03 | 2018-08-28 | 石家庄富瑞沃机电设备有限公司 | A kind of roll device and forming method of square tube straight forming |
| CN112588896A (en) * | 2020-12-18 | 2021-04-02 | 武汉钢铁江北集团冷弯型钢有限公司 | Forming method of asymmetric pentagonal thin-wall cold-formed steel pipe with sharp corners |
| CN114290004A (en) * | 2022-01-12 | 2022-04-08 | 济南方圆制管有限公司 | Preparation process of sharp-angled square tube for outer cantilever of tower crane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1039523C (en) | 1998-08-19 |
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| C56 | Change in the name or address of the patentee |
Owner name: HANKOU STEEL ROLLING MILL, WUHAN IRON & STEEL GROU Free format text: FORMER NAME OR ADDRESS: HANKOU STEEL ROLLING MILL, WUHAN IRON + STEEL CORP. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 430035 Hubei province in Qiaokou District of Wuhan city Gutian Road No. 36 Patentee after: Hankou Steel Rolling Mill, Wuhan Iron & Steel Group Address before: 430035 Hubei province in Qiaokou District of Wuhan city Gutian Road No. 36 Patentee before: Hankou Steel Rolling Mill, Wuhan Iron & Steel Corp. |
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| ASS | Succession or assignment of patent right |
Owner name: WUHAN IRON AND STEEL GROUP CORP. Free format text: FORMER OWNER: HANKOU STEEL ROLLING MILL, WUHAN IRON + STEEL GROUP Effective date: 20070216 |
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Effective date of registration: 20070216 Address after: 430083 Wuhan City Qingshan District Factory No. 2 gate, Wuhan Iron and steel technology innovation department Patent Office Patentee after: Wuhan Iron & Steel (Group) Co., Ltd. Address before: 430035 Hubei province in Qiaokou District of Wuhan city Gutian Road No. 36 Patentee before: Hankou Steel Rolling Mill, Wuhan Iron & Steel Group |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 19980819 |