CN101380652A - 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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- CN101380652A CN101380652A CNA2008101215768A CN200810121576A CN101380652A CN 101380652 A CN101380652 A CN 101380652A CN A2008101215768 A CNA2008101215768 A CN A2008101215768A CN 200810121576 A CN200810121576 A CN 200810121576A CN 101380652 A CN101380652 A CN 101380652A
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Abstract
The invention discloses a processing technique for the cold-bending and shaping of a large curved steel pipe. The length of the axis of the large curved steel pipe is calculated at first; then the axis of the curved steel pipe is equally divided into sections; one end of the axis of the curved steel pipe is used as a coordinate dot for building a Descartes local coordinate system; the coordinates of the subsection points of the axis in the Descartes local coordinate system are calculated; steel pipe baiting is carried out according to the calculated length of the axis of the steel pipe; a curve which is homocentric with the axis of the steel pipe is marked on a pipe wall at the inner side of the curve of the bending plane of the curved steel pipe; besides, the positions of the subsection points are marked; the steel pipe marked with the positions of the subsection points are bent and shaped under a three-roller or four-roller bending machine, or is pressed and shaped under a large hydraulic press. The processing technique not only has high production efficiency and effectively solves the technical problems for the shaping and processing of the large curved steel pipe, but also can ensure the product quality and reduce the cost.
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 bent member.
Background technology
Along with the raising of architectural design level and the development of process equipment, the application of curve type steel tube in construction steel structure is more and more, because the axis of curve type steel tube is that any space curve and curvature are change at random, 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, and is big especially for some diameters, the curve type steel tube of curve shape complexity, even also have the problem that is difficult to overcome on technical or the equipment.
Summary of the invention
The processing technology that the purpose of this invention is to provide a kind of production efficiency height and the measured large-sized curve type steel tube cold roll forming of matter.
The objective of the invention is to be achieved through the following technical solutions.
The processing technology of large-sized curve type steel tube cold roll forming:
1) calculates the length of curve type steel tube axis according to the curve type steel tube length gauge of design;
2) the curve type steel tube axis is carried out equidistant segmentation;
3) set up Descartes's local coordinate system with an end points of curve type steel tube axis as the coordinate round dot;
4) coordinate of calculated curve shape steel tube axis waypoint in Descartes's local coordinate system;
5), add the straight section amputation length intercepting steel pipe after the bending two ends again according to the length of the curve type steel tube axis that calculates;
6) standardized curve concentric on the inboard tube wall of the curve of curve type steel tube plane of bending with the curve type steel tube axis, and on the steel pipe walls of intercepting, mark the position of waypoint;
7) steel pipe coordinate according to curve type steel tube axis waypoint under three rollers or four bending machines that will mark the waypoint position bends to curve type steel tube, or the coordinate according to curve type steel tube axis waypoint bends into curve type steel tube under large hydraulic press.
Described the curve type steel tube axis is carried out equidistant segmentation, at the curve type steel tube axis flex point place being arranged must be waypoint.
The present invention is owing to carry out segmentation and set up the waypoint coordinate and processed the curve type steel tube axis, and not only production efficiency is high and efficiently solve the technical problem of large-scale steel pipe cold roll forming processing, and can guarantee product quality.
The specific embodiment
The specific embodiment of the processing technology of large-sized curve type steel tube cold roll forming is as follows:
Now process an envelope length and be 500 meters, width and be 16 meters large-scale sine curve plain bending steel pipe, 5 complete vibration periods are arranged in 500 meters length, amplitude is 8 meters, and the diameter of round steel pipe is 800 millimeters, and wall thickness is 40 millimeters.
1) according to the length of the envelope length computation curve type steel tube axis of curve type steel tube, computational methods can adopt function method or graphing method, and the length that this example adopts graphing method to calculate is 675.2 meters; 2) with the equidistant segmentation of curve type steel tube axis, curve type steel tube axis flex point place must be a waypoint, sublevel interval should be determined according to curve type steel tube axis curvature, the big more sublevel interval of curvature is more little, curvature subsection spacing more is big more, this example is established 9 waypoints in per 1/4 cycle, 1/4 wavelength is divided into 10 sections, zero hour of each vibration period, 1/4 cycle constantly, 1/2 cycle constantly and vibration respectively establish a node finish time; 3) end points with the curve type steel tube axis is that the coordinate round dot is set up Descartes's local coordinate system, when setting up coordinate system, should make the plane or the curve type steel tube axis at curve type steel tube axis place be positioned at the XY coordinate plane on the plane at the projection place of a certain direction, this example is an X-axis with the line of the residing position of first axis node zero hour vibration period and last residing position of axis node finish time vibration period, and the XY coordinate plane is in the sine curve plane; 4) coordinate of calculated curve shape steel tube axis waypoint in Descartes's local coordinate system, the expression but the result of calculation Direct Mark also can be tabulated at the waypoint place of curve type steel tube axis; 5) intercept steel pipe according to the curve type steel tube axial length of calculating, should increase bending two ends straight section amputation length during the intercepting steel pipe, when bending two ends straight section amputation length adopts the back welder to plant, two ends should respectively increase 100mm, to increase the part amputation again behind crooked the end, this example is bent tube technique continuously, and therefore, cutting length is 675.4 meters; 6) standardized curve concentric on the inboard tube wall of the curve of curve type steel tube plane of bending with the curve type steel tube axis, and in the position that intercepts mark waypoint on the steel pipe walls; 7) steel pipe that will mark the waypoint position carries out bending under three rollers or four bending machines, this is applicable to small bore plane circular curve steel pipe, or under large hydraulic press, bend, this is applicable to heavy in section plane curve steel pipe or space curve steel pipe, because this routine curve steel pipe will be processed into the sine curve type, so this example can only adopt large hydraulic press to carry out bending; Bending should the branch multistep be carried out, and answers spring Qu Bianjian to look in the BENDING PROCESS, reaches the result of designing requirement until curve shape.
When this routine curve type steel tube also requires the plane outside sweep, at this moment, just become the moulding problem of space curve shape steel tube, its technology is not that all the other methods are identical 0 except that Z to coordinate figure.
After product appearance and quality examination meet relevant acceptance criteria requirement, can obtain qualified curve type steel tube product.
Claims (2)
1. the processing technology of large-sized curve type steel tube cold roll forming:
1) calculates the length of curve type steel tube axis according to the curve type steel tube length gauge of design;
2) the curve type steel tube axis is carried out equidistant segmentation;
3) set up Descartes's local coordinate system with an end points of curve type steel tube axis as the coordinate round dot;
4) coordinate of calculated curve shape steel tube axis waypoint in Descartes's local coordinate system;
5), add the straight section amputation length intercepting steel pipe after the bending two ends again according to the length of the curve type steel tube axis that calculates;
6) standardized curve concentric on the inboard tube wall of the curve of curve type steel tube plane of bending with the curve type steel tube axis, and in the position that intercepts mark waypoint on the steel pipe walls;
7) steel pipe coordinate according to curve type steel tube axis waypoint under three rollers or four bending machines that will mark the waypoint position bends to curve type steel tube, or the coordinate according to curve type steel tube axis waypoint bends into curve type steel tube under large hydraulic press.
2. the processing technology of large-sized curve type steel tube cold roll forming according to claim 1 is characterized in that: described the curve type steel tube axis is carried out equidistant segmentation, at the curve type steel tube axis flex point place being arranged must be waypoint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101215768A CN101380652A (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 |
|---|---|---|---|
| CNA2008101215768A CN101380652A (en) | 2008-10-14 | 2008-10-14 | Cold roll forming technique of large-sized curve type steel tube |
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| Publication Number | Publication Date |
|---|---|
| CN101380652A true CN101380652A (en) | 2009-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008101215768A Pending CN101380652A (en) | 2008-10-14 | 2008-10-14 | Cold roll forming technique of large-sized curve type steel tube |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101912907A (en) * | 2010-08-13 | 2010-12-15 | 安徽瑶海钢结构股份有限公司 | Cold-bending processing equipment and method of steel pipe |
| CN101927281B (en) * | 2009-06-26 | 2011-12-07 | 中国石油天然气集团公司 | Method for manufacturing step-variable cold bending pipe |
| CN102350452A (en) * | 2011-07-07 | 2012-02-15 | 株洲双菱科技有限公司 | Large-diameter radian bending method of steel pipe and large-bend pipe bender |
| CN102847756A (en) * | 2011-06-28 | 2013-01-02 | 上海江南长兴重工有限责任公司 | Marine thick plate bending process |
| CN105499927A (en) * | 2015-12-24 | 2016-04-20 | 中铁宝桥集团有限公司 | Manufacturing method of space curve profile steel component |
-
2008
- 2008-10-14 CN CNA2008101215768A patent/CN101380652A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101927281B (en) * | 2009-06-26 | 2011-12-07 | 中国石油天然气集团公司 | Method for manufacturing step-variable cold bending pipe |
| CN101912907A (en) * | 2010-08-13 | 2010-12-15 | 安徽瑶海钢结构股份有限公司 | Cold-bending processing equipment and method of steel pipe |
| CN102847756A (en) * | 2011-06-28 | 2013-01-02 | 上海江南长兴重工有限责任公司 | Marine thick plate bending process |
| CN102847756B (en) * | 2011-06-28 | 2015-03-11 | 上海江南长兴重工有限责任公司 | Marine thick plate bending process |
| CN102350452A (en) * | 2011-07-07 | 2012-02-15 | 株洲双菱科技有限公司 | Large-diameter radian bending method of steel pipe and large-bend pipe bender |
| CN105499927A (en) * | 2015-12-24 | 2016-04-20 | 中铁宝桥集团有限公司 | Manufacturing method of space curve profile steel component |
| CN105499927B (en) * | 2015-12-24 | 2017-12-12 | 中铁宝桥集团有限公司 | A kind of manufacture method of space curve Steel section member |
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Open date: 20090311 |