CN1268452C - Method for making a rectangular steel tube with a closed angle - Google Patents
Method for making a rectangular steel tube with a closed angle Download PDFInfo
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- CN1268452C CN1268452C CN 03111083 CN03111083A CN1268452C CN 1268452 C CN1268452 C CN 1268452C CN 03111083 CN03111083 CN 03111083 CN 03111083 A CN03111083 A CN 03111083A CN 1268452 C CN1268452 C CN 1268452C
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Abstract
The present invention relates to a method for manufacturing rectangular steel pipes by cold-bending shaping, particularly to a method for manufacturing rectangular steel pipes with only one closed angle. The method is characterized in that in the method, band steel is shaped by a cold-bending shaping method through nine passes, high-frequency welding, extruding, shaping and straightening are carried out on shaped band steel then, and finished band steel can be completed; an opposite angle of a closed angle is used as a base point, the base diameter of a roller is on the point, and connecting lines of the point on all passes are used as rolling central lines; both sides of the band steel are upwards bent by using the symmetric deformation of angles in each pass, namely that angles upwards bent are equal; in addition, a single-side deformation mode is used, the outer side is deformed first, the inner side is deformed later, and finally, two sides are closed in a position deviating from the rolling central line to form a rectangular closed angle. The present invention has the advantages of reasonable technique, stable deformation process, simple operation process, high qualified product rate, good quality, etc., and has no pollution.
Description
Technical field
The present invention relates to cold roll forming and make the method for rectangular steel pipe, particularly have the manufacture method of the rectangular steel pipe of a wedge angle.
Background technology
According to user's instructions for use, in four angles of rectangular steel pipe, one of them angle need be a wedge angle, and this manufacturing has the method for the rectangular steel pipe of a wedge angle, can also can realize by the method for short band steel with the bender bending and molding realized with the method for hot-rolled steel channel butt welding.These two kinds of ubiquitous shortcomings of method are that efficient is low, lumber recovery is low, of poor quality, labour intensity is big, environment is polluted.The patent No. is that 93104319.0 Chinese patent discloses a kind of method of making square pipe with sharp corners, this method adopts eccentric cold roll forming, the distortion moment unbalance, the band steel is in metastable condition all the time, distortion moment is big, and the deformation process instability is adjusted trouble, operating difficulties, the fillet of pipe is inhomogeneous after the moulding.Number of patent application is that 02103603.9 patent of invention discloses and a kind ofly makes the method for printed angle rectangle section steel pipe with cold roll forming, and this method is that the line with wedge angle and diagonal angle thereof is a rolling centerline, obtains this product by the distortion of eight passages.This method because band steel dual-side makes progress deformation angle unequal, so the diagonal angle shape of wedge angle is asymmetric, forming process is also stable inadequately.Band steel end face is sheared inclined-plane at 45, has increased the complexity of operation again, and shear history is also unstable, inhomogeneous simultaneously.
Summary of the invention
Problem to be solved by this invention is to overcome the deficiency that prior art exists, and provides that a kind of technology is reasonable, deformation process stable, the manufacture method of the rectangular steel pipe with a wedge angle of the simple cold roll forming manufacturing of operating process.
Manufacture method with rectangular steel pipe of a wedge angle, it is characterized in that: this method is to make the band steel use the method for cold roll forming through nine passage moulding, again through high-frequency welding, extruding, integer, aligning is realized, described nine passage moulding are that the diagonal angle with wedge angle is a basic point, the base diameter of roll is at this point, this at the line of each passage as rolling centerline, band steel both sides utilize the angle symmetric deformation to be bent upwards in each passage, promptly being bent upwards angle equates, and adopt monolateral mode of texturing, outer side edges is distortion earlier, is out of shape behind the inner side edge, finally closes to depart to form a rectangle wedge angle on the rolling centerline; After the clod wash extrusion modling, rectangle wedge angle closed interface place adopts high-frequency resistance welding to connect, and weld seam is located at the inboard on long limit, and between the end face of minor face, the angle of inclination of making the wedge angle rectangular tube again behind extruding, sizing, aligning is 45 ° a finished product.
Described manufacture method with rectangular steel pipe of a wedge angle is characterized in that: through nine passage symmetric deformations, each passage of roll is that previous three passes is the outer side edges distortion, back six passages are the inner side edge distortion, deformation angle is 25 ° in 1 road, 52 ° in 2 roads, 78 ° in 3 roads, 10 ° in 4 roads, 20 ° in 5 roads, 30 ° in 6 roads, 35 ° in 7 roads, 41.5 ° in 8 roads, 45 ° in 9 roads.
Interface adopts the high-frequency welding closure, makes rectangular steel pipe satisfy the apparent size requirement behind sizing, the aligning.For guaranteeing the commissure quality, the 8th road closed type angle of bend is 41.5 °, and like this, shape district, weld bond place " V " angle is just guaranteed.
The invention has the beneficial effects as follows: utilize the angle symmetric deformation, can make the band steel stable in deformation process, be difficult for sideslip, strip edge edge rise difference in height is little, the suffered tension uniform of strip edge edge.Band steel both sides are bent upwards angle and equate (two contained sides at the diagonal angle at finger tip angle), can make the pressure direction unanimity of up-down rollers to two contained sides at this angle, guarantee that the rounded shapes of steel pipe is rectified.This method adopts monolateral distortion, and more stable than bilateral distortion, the bight number of bends is few, reduces the bight sclerosis.
The present invention helps welding the installation of contact, and is stable during contact contact zones steel, helps the adjustment of planing tool frame.This method adopts Contact welding, has improved welding efficiency than induction welding, has saved the energy.This method makes weld seam between inboard, long limit and minor face end face, helps the utilization of high frequency electric approach effect characteristics.In a word, the present invention has advantages such as technology is reasonable, deformation process stable, operating process is simple, lumber recovery is high, quality is good, pollution-free.
Description of drawings
Fig. 1 is the sectional view with rectangular steel pipe of a wedge angle.
Fig. 2 is an outer side edges elder generation deformation pattern.
Fig. 3 is a deformation pattern behind the inner side edge.
The specific embodiment
Describe present embodiment in detail below in conjunction with accompanying drawing.
The manufacture method step of rectangular steel pipe with a wedge angle is as follows:
1), determines the length of tube edge 1,2,3,4 according to the requirement of product cross section size.
2) with the rolling centerline be basic point, band steel bilateral symmetry is bent upwards equal angular, adopts monolateral mode of texturing, and outer side edges is distortion earlier, is out of shape behind the inner side edge.Deformation angle is as follows: 25 ° in outer side edges 1 road, 52 ° in 2 roads, the 78 ° of (see figure 2)s in 3 roads, 10 ° in inner side edge 4 roads, 20 ° in 5 roads, 30 ° in 6 roads, 35 ° in 7 roads, 41.5 ° in 8 roads, the 45 ° of (see figure 3)s in 9 roads.During to extrusion modling, limit 1 and limit 4 closures form a rectangle wedge angle in a side that departs from rolling centerline.
3) after the clod wash extrusion modling, rectangle wedge angle closed interface place adopts high-frequency resistance welding to connect, and weld seam is located at the inboard on long limit, between the end face of minor face, help the application of high frequency electric approach effect, the angle of inclination of making the wedge angle rectangular tube again behind extruding, sizing, aligning is 45 ° a finished product.
Claims (3)
1. the manufacture method that has the rectangular steel pipe of a wedge angle, it is characterized in that: this method is to make the band steel use the method for cold roll forming through nine passage moulding, again through high-frequency welding, extruding, integer, aligning is realized, described nine passage moulding are that the diagonal angle with wedge angle is a basic point, the base diameter of roll is at this point, this at the line of each passage as rolling centerline, band steel both sides utilize the angle symmetric deformation to be bent upwards in each passage, promptly being bent upwards angle equates, and adopt monolateral mode of texturing, outer side edges is distortion earlier, is out of shape behind the inner side edge, finally closes to depart to form a rectangle wedge angle on the rolling centerline; After the clod wash extrusion modling, rectangle wedge angle closed interface place adopts high-frequency resistance welding to connect, and weld seam is located at the inboard on long limit, and between the end face of minor face, the angle of inclination of making the wedge angle rectangular tube again behind extruding, sizing, aligning is 45 ° a finished product.
2. the manufacture method with rectangular steel pipe of a wedge angle according to claim 1 is characterized in that: through nine passage symmetric deformations, each passage of roll is that previous three passes is the outer side edges distortion, back six passages are the inner side edge distortion, deformation angle is 25 ° in 1 road, 52 ° in 2 roads, 78 ° in 3 roads, 10 ° in 4 roads, 20 ° in 5 roads, 30 ° in 6 roads, 35 ° in 7 roads, 41.5 ° in 8 roads, 45 ° in 9 roads.
3. the manufacture method with rectangular steel pipe of a wedge angle according to claim 1 is characterized in that: for guaranteeing the commissure quality, the 8th road closed type angle of bend is 41.5 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03111083 CN1268452C (en) | 2003-02-25 | 2003-02-25 | Method for making a rectangular steel tube with a closed angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03111083 CN1268452C (en) | 2003-02-25 | 2003-02-25 | Method for making a rectangular steel tube with a closed angle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1524637A CN1524637A (en) | 2004-09-01 |
| CN1268452C true CN1268452C (en) | 2006-08-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03111083 Expired - Fee Related CN1268452C (en) | 2003-02-25 | 2003-02-25 | Method for making a rectangular steel tube with a closed angle |
Country Status (1)
| Country | Link |
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| CN (1) | CN1268452C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801583B (en) * | 2014-02-13 | 2016-04-13 | 风范绿色建筑（常熟）有限公司 | Large gauge directly becomes square tube processing technology |
| 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 |
| 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 |
| CN107983811B (en) * | 2017-11-30 | 2019-05-17 | 武汉钢铁江北集团冷弯型钢有限公司 | A kind of roll bending formation method of D-shaped steel pipe |
| CN109396226B (en) * | 2018-12-28 | 2020-09-29 | 西北工业大学 | Method for determining offset position of neutral layer in pipe bending |
| CN111215475B (en) * | 2019-10-28 | 2022-01-21 | 武汉钢铁江北集团冷弯型钢有限公司 | Cold bending forming method of square sharp-corner steel pipe |
| CN113579658B (en) * | 2021-08-06 | 2023-10-17 | 四川攀钢嘉德精工科技有限公司 | Steel plate deformation process |
-
2003
- 2003-02-25 CN CN 03111083 patent/CN1268452C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1524637A (en) | 2004-09-01 |
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Granted publication date: 20060809 |