CN101386041B - Cold roll forming technique of large-sized curve type steel tube - Google Patents
Cold roll forming technique of large-sized curve type steel tube Download PDFInfo
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- CN101386041B CN101386041B CN 200810121574 CN200810121574A CN101386041B CN 101386041 B CN101386041 B CN 101386041B CN 200810121574 CN200810121574 CN 200810121574 CN 200810121574 A CN200810121574 A CN 200810121574A CN 101386041 B CN101386041 B CN 101386041B
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- tapered steel
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Abstract
A machining process for cold forming a large tapered steel pipe comprises the following steps: the large tapered steel pipe is divided into two sections or more than two sections of short tapered steel pipes according to the machining capacity of a bending machine or a hydraulic press for cold forming and according to the length of the designed axis of the large tapered steel pipe; each section of the short tapered steel pipe is unfolded to a fan-shaped plane; a steel plate is lined out according to the size of each fan-shaped plane and cut off by a cutting machine; the cut fan-shaped steel plate is successively and repeatedly processed by the bending machine or the hydraulic press and primarily rolled to a short tapered steel pipe or primarily rolled and rounded to the short tapered steel pipe; and slits on the joint of the short tapered steel pipes are welded and finished to form, the welded zone is subject to ultrasonic examination; finally the examined short tapered steel pipes are welded one by one according to the diameter, and the welded zones are subject to the ultrasonic examination. The machining process not only has high production efficiency, effectively solves the problem of machining technology for forming the large tapered steel pipes, but also ensures the product quality.
Description
Technical field
The present invention relates to a kind of hardware processing technology, be mainly used in the processing technology of construction steel structure member.
Background technology
Along with the raising of architectural design level and the development of process equipment, conical steel pipe, the application of chapped pipe in construction steel structure such as fusiformis steel pipe are more and more, because the cross section of chapped pipe is that continually varying and tapering are non-constant, the member diameter is big especially mostly, wall thickness is thick especially, belong to nonstandard member, if adopt the hot rolling technology moulding, need special molding, also will transform, so existing smelting equipment, not only with high costs, and the cycle is longer, for the king-sized conical steel pipe of some diameters, even also has the problem that is difficult to overcome on technical or the equipment.
Summary of the invention
The purpose of this invention is to provide a kind of production efficiency height and the measured large cone steel pipe of matter cold forming processing technology.
The objective of the invention is to be achieved through the following technical solutions.
The processing technology of large cone steel pipe cold forming:
1), is divided into short taper profile steel pipe more than 2 sections or 2 sections according to the length of the large cone steel pipe axis of design more earlier according to the working ability of the veneer reeling machine or the large hydraulic press of cold forming;
2) every section short taper profile steel pipe is expanded into fan-shaped plan along the wall thickness neutral cross section;
3) rule on steel plate according to the size of the every fan-shaped plan mark that launches, mark equally spaced bus simultaneously, and mark pressure head peach point straight section at two ends;
4) on steel plate, will draw comprising that every of peach point straight section is fan-shaped and cutting down of line with cutting machine from steel plate;
5) earlier the fan-shaped steel plate two ends are carried out excising peach point straight section again behind the pressure head;
6) then every fan-shaped steel plate under veneer reeling machine, from the end to end of fan-shaped steel plate multipass successively fan-shaped steel plate is tentatively rolled into the short taper profile steel pipe along drawing good bus;
Or under large hydraulic press, the end to end along stroke good bus from fan-shaped steel plate multipass is successively tentatively suppressed fan-shaped steel plate, is closed and justify into the short taper profile steel pipe;
7) each is rolled or suppresses the slit of short taper profile steel pipe joint of closing behind the circle is welded to connect, the finishing moulding, and weld is carried out the ultrasonic examination inspection;
8) at last each short taper profile steel pipe of checking is welded to connect one by one by diameter, and carries out the ultrasonic examination inspection at the place of being welded to connect.
The present invention has been owing to adopted and the large cone steel pipe is divided into the short taper profile steel pipe processes, and not only production efficiency is high and efficiently solve the process technology problem of large cone steel pipe moulding for this, and can guarantee the quality of product, and cost is lower.
The specific embodiment
The specific embodiment of large cone steel pipe cold forming processing technology is as follows:
Now process a long conical steel pipe of 500 meters, the diameter of steel pipe one end is 2 meters, and the diameter of the other end is 1.2 meters, and wall thickness is 60 millimeters.
If adopt the veneer reeling machine moulding, the maximum machining length of this equipment is 4 meters.1) will design 500 meters long conical steel pipes processing and be divided into 125 sections short taper profile steel pipes on its axis, every section short taper profile steel pipe length is that axial length is 4 meters; 2) every section short taper profile steel pipe is expanded into fan-shaped plan along the thickness of pipe wall neutral cross section; 3) rule on steel plate according to the fan-shaped plan dimensioning of launching, and mark 30 and be used to control the equidistant bus that veneer reeling machine rolls, should respectively increase by 4 millimeters cutting surpluses during line according to the service behaviour of numerical control plasma cutting machine on camber line limit, both sides, and increase i.e. 90 millimeters the peach point straight section amputation width of 1.5 times of thicknesss of slab at the two ends straight line; 4) with the sideline of numerical control plasma cutting machine every fan-shaped steel plate is cut down, and remove the cutting residue along fan-shaped plan; 5) pressure head and amputation two ends peach point straight section are carried out in the fan-shaped steel plate two ends; 6) under veneer reeling machine, along drawing the end to end of good bus from fan-shaped steel plate, multipass tentatively rolls into the short taper profile steel pipe with fan-shaped steel plate successively; 7) longitudinal slot to joint welds and the finishing moulding; 8) weld is carried out the ultrasonic examination inspection; 9) when outward appearance and internal soundness all meet acceptance criteria and require, each short taper profile steel pipe is welded to connect one by one by former segmentation position, and carry out the ultrasonic examination inspection at each short taper profile steel pipe place of being welded to connect, after meeting standard-required, just become the large cone steel pipe of a cold forming processing.
If adopt large hydraulic press compression moulding, for the steel plate of 60 millimeters thickness, the maximum machining length of this equipment is 10 meters.At first, need 500 meters long conical steel pipes are divided into 50 sections short taper profile steel pipes, every section short taper profile steel pipe length is that axial length is 10 meters; Thereafter except that increasing " closing circle " operation before " longitudinal slot to joint welds " operation, all the other operations and roll-forming are identical in the per pass operation.
Claims (1)
1. the processing technology of large cone steel pipe cold forming:
1), is divided into short taper profile steel pipe more than 2 sections or 2 sections according to the length of the large cone steel pipe axis of design more earlier according to the working ability of the veneer reeling machine or the large hydraulic press of cold forming;
2) every section short taper profile steel pipe is expanded into fan-shaped plan along the wall thickness neutral cross section;
3) rule on steel plate according to the size of the every fan-shaped plan mark that launches, mark equally spaced bus simultaneously, and mark pressure head peach point straight section at two ends;
4) on steel plate, will draw comprising that every of peach point straight section is fan-shaped and cutting down of line with cutting machine from steel plate;
5) earlier the fan-shaped steel plate two ends are carried out excising peach point straight section again behind the pressure head;
6) then every fan-shaped steel plate under veneer reeling machine, from the end to end of fan-shaped steel plate multipass successively fan-shaped steel plate is tentatively rolled into the short taper profile steel pipe along drawing good bus;
Or under large hydraulic press, the end to end along stroke good bus from fan-shaped steel plate multipass is successively tentatively suppressed fan-shaped steel plate, is closed and justify into the short taper profile steel pipe;
7) each is rolled or suppresses the slit of short taper profile steel pipe joint of closing behind the circle is welded to connect, the finishing moulding, and weld is carried out the ultrasonic examination inspection;
8) at last each short taper profile steel pipe of checking is welded to connect one by one by diameter, and carries out the ultrasonic examination inspection at the place of being welded to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810121574 CN101386041B (en) | 2008-10-14 | 2008-10-14 | Cold roll forming technique of large-sized curve type steel tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810121574 CN101386041B (en) | 2008-10-14 | 2008-10-14 | Cold roll forming technique of large-sized curve type steel tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101386041A CN101386041A (en) | 2009-03-18 |
| CN101386041B true CN101386041B (en) | 2010-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200810121574 Active CN101386041B (en) | 2008-10-14 | 2008-10-14 | Cold roll forming technique of large-sized curve type steel tube |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102513417B (en) * | 2011-10-31 | 2013-08-28 | 武汉一冶钢结构有限责任公司 | Rolling method of right cone frustum shell bodies |
| CN104551580B (en) * | 2013-10-11 | 2018-06-05 | 珠海格力电器股份有限公司 | The manufacturing method of central air-conditioning heat exchanger package |
| CN105014323A (en) * | 2015-07-30 | 2015-11-04 | 江苏金曼科技有限责任公司 | Manufacturing method for conical bottom |
| CN105817841B (en) * | 2016-04-21 | 2018-06-29 | 重庆通用工业(集团)有限责任公司 | Shape tube forming method |
| CN109877547A (en) * | 2019-04-24 | 2019-06-14 | 哈尔滨汽轮机厂有限责任公司 | A kind of preparation method of extraction steam pipe |
| CN110159053A (en) * | 2019-06-25 | 2019-08-23 | 中电建成都铁塔有限公司 | A kind of power transmission line polygon rod structure and its manufacture craft |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3648008A (en) * | 1968-12-11 | 1972-03-07 | Nippon Kokan Kk | Method of making tapered poles |
| CN1338353A (en) * | 2000-08-18 | 2002-03-06 | 黄金铭 | Technology for machine conic sleeve barrel |
| CN1432441A (en) * | 2002-01-16 | 2003-07-30 | 徐光平 | Making process of conic middle tube |
| CN1943896A (en) * | 2006-10-24 | 2007-04-11 | 周山 | Method for processing arbitrary taper seamless stainless steel pipe |
-
2008
- 2008-10-14 CN CN 200810121574 patent/CN101386041B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3648008A (en) * | 1968-12-11 | 1972-03-07 | Nippon Kokan Kk | Method of making tapered poles |
| CN1338353A (en) * | 2000-08-18 | 2002-03-06 | 黄金铭 | Technology for machine conic sleeve barrel |
| CN1432441A (en) * | 2002-01-16 | 2003-07-30 | 徐光平 | Making process of conic middle tube |
| CN1943896A (en) * | 2006-10-24 | 2007-04-11 | 周山 | Method for processing arbitrary taper seamless stainless steel pipe |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2004-106030A 2004.04.08 |
| JP特开2004-237289A 2004.08.26 |
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| CN101386041A (en) | 2009-03-18 |
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