CN101850378B - Manufacturing method of 1.5D elbow - Google Patents
Manufacturing method of 1.5D elbow Download PDFInfo
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- CN101850378B CN101850378B CN2010101785059A CN201010178505A CN101850378B CN 101850378 B CN101850378 B CN 101850378B CN 2010101785059 A CN2010101785059 A CN 2010101785059A CN 201010178505 A CN201010178505 A CN 201010178505A CN 101850378 B CN101850378 B CN 101850378B
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- steel pipe
- elbow
- ring side
- heater coil
- outer ring
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Abstract
The invention discloses a manufacturing method of a 1.5D elbow, which comprises the followings steps: steel plate blanking, barrel rolling, welding, shaping, process head welding, heating processing, heat treatment, groove processing, nondestructive detection and finished product testing. The key improvements are as follows: the diameter of a heating coil is larger than the diameter of a steel pipe, and the heating coil is fixedly arranged relative to a steel pipe pushing device; the axis of the heating coil is not coincident with the axis of the steel pipe, and the heating coil is arranged in a leaning way relative to the outer ring side of the steel pipe after bending. The invention has the advantages that: the distance between the heating coil and the inner ring side of the elbow is smaller than the distance between the heating oil and the outer ring side of the elbow, and the temperature of the inner ring side is higher than that of the outer ring side in the electrifying and heating process of the heating coil, therefore, the molecules of steel material of the inner ring side of the elbow are more active than the molecules of steel material of the outer ring side of the elbow, thereby ensuring that the wall thickness is not excessively reduced when the outer ring side is extended in the bending process; and the temperature of the inner ring side is high so as to facilitate the metal to flow, thereby being not easy to crease, improving the yield of the elbow and reducing economic losses.
Description
Technical field
The present invention relates to a kind of elbow manufacturing process, particularly a kind of 1.5D manufacture method of elbow.
Background technology
Along with developing rapidly of oil, gas industry and urban pipe network, various oil transportations, gas transmission line go into operation successively, and high grade of steel, the steel pipe of big wall thickness and the demand of pipe fitting are improved constantly.The processing of steel pipe connecting bend mainly contains dual mode, and a kind of is the compressing tablet welding, and another is to add fire bending system.At present, low grade of steel φ 406～φ 711, R=1.5D elbows such as 16Mn, 20# steel mainly adopt eddy-current heating to simmer system technology; The pipe line steel elbow of high grade of steel then adopts the production of compressing tablet flat welding process, and production efficiency is low, the cost height, and quality is unreliable.Existing manufacture method mainly is steel plate cutting, reel, welding, shaping, welding procedure head, adds processing steps such as fire bending system, heat treatment, groove processing, Non-Destructive Testing, product inspection, adopt with the coaxial single turn heater coil of steel pipe in adding in the fire bending system operation of key and to heat, distance evenly around heater coil and the tube wall, so form in the elbow process, elbow inner ring side is identical with outer ring side temperature, be easy to generate outer ring attenuate, the wrinkling problem of inner ring, reduced yield rate, caused damage to manufacturing enterprise.
Summary of the invention
The invention provides a kind of 1.5D manufacture method of elbow,, can effectively improve the elbow rate that manufactures a finished product, reduce economic loss to solve outer ring attenuate, the wrinkling problem of inner ring in the elbow manufacture process.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of 1.5D manufacture method of elbow, comprise in its step: steel plate cutting, reel, welding, shaping, welding procedure head, add fire bending system, heat treatment, groove processing, Non-Destructive Testing, product inspection, the fire bending system operation that adds wherein may further comprise the steps: 1) steel pipe of shaping and welding procedure joint is passed an end that will pass heater coil behind steel pipe guider, the heater coil and be clamped on the rotary positioning apparatus, another section is clamped on the pusher device; 2) heating power supply of connection heater coil; 3) reach to simmer and start the pusher device after the system temperature to drive steel pipe at the uniform velocity mobile along its axis; 4) shut down the back and take out the steel pipe that is simmered into elbow; its key improvements is: the diameter of described heater coil is greater than the diameter of steel pipe; and fixedly install with respect to steel pipe pusher device, the axis of heater coil does not overlap with the steel pipe axis, and puts with respect to the outer ring lateral deviation behind the tube bending.
Above-mentioned heater coil is a single-turn circular coil.
Above-mentioned steel pipe rotary positioning apparatus comprises: vertically be arranged on the rotating shaft on the bearing, one end is fixedly installed on the turning arm on rotating shaft top, turning arm is horizontally disposed with, horizontally disposed clamping limb is vertically fixed on the open end of turning arm, and the end that steel pipe passes heater coil is clamped on the open end of clamping limb.
Above-mentioned guider is the guide roller that has V-shaped groove that is arranged on the steel pipe both sides, and guide roller is oppositely arranged.
Above-mentioned pusher device is a hydraulic cylinder, and hydraulic cylinder push rod open end is provided with clamping device.
Adopt the beneficial effect that technique scheme produced to be: the distance behind heater coil and the tube bending between the formed elbow inner ring side less than and its outer ring side between distance, the temperature of inner ring side is higher than the temperature of outer ring side in the heater coil energising heating process, so the molecule of elbow inner ring side steel is active than the molecule of outer ring side steel, thereby guarantee in the process of bending, wall thickness can excessive thinning when the outer ring side was stretched, inner ring side temperature height is convenient to metal flow, thereby do not crease easily, improve the elbow yield rate, reduced economic loss.
Description of drawings:
Fig. 1 is for adding steel pipe clamping schematic diagram in the fire bending system operation;
Fig. 2 is the schematic diagram that adds in the fire bending system process;
Fig. 3 is the schematic diagram that adds after fire bending system operation is finished;
Fig. 4 is the stereogram that adds steel pipe clamp position in the fire bending system operation;
1, bearing; 2, turning arm; 3, rotating shaft; 4, clamping limb; 5, steel pipe; 6, heater coil; 7, guide roller.
The specific embodiment
For above-mentioned purpose of the present invention, feature and beneficial effect can be become apparent more,, technical scheme of the present invention is carried out in detail, intactly described below in conjunction with the specific embodiment of the invention.
As Fig. 1, Fig. 2, a kind of 1.5D manufacture method of elbow of Fig. 3, comprise in its step: steel plate cutting, reel, welding, shaping, welding procedure head, add fire bending system, heat treatment, groove processing, Non-Destructive Testing, product inspection, the fire bending system operation that adds wherein may further comprise the steps: 1) steel pipe 5 of shaping and welding procedure joint is passed an end that will pass heater coil behind steel pipe guider, the heater coil 6 and be clamped on the rotary positioning apparatus, an other end is clamped on the clamping device as the hydraulic cylinder push rod open end of pusher device; 2) heating power supply of connection heater coil 6; 3) startup pusher device driving steel pipe 5 was at the uniform velocity mobile along its axis after the system temperature was simmered in arrival; 4) shut down the back and take out the steel pipe that is simmered into elbow; its key improvements is: the diameter of described heater coil 6 is greater than the diameter of steel pipe 5; and fixedly install with respect to steel pipe pusher device; the axis of heater coil does not overlap with steel pipe 5 axis; and put with respect to the outer ring lateral deviation after steel pipe 5 bendings, heater coil is a single-turn circular coil.
Above-mentioned steel pipe rotary positioning apparatus comprises: vertically be arranged on the rotating shaft on the bearing 1, one end is fixedly installed on the turning arm 2 on rotating shaft top, turning arm 2 is horizontally disposed with, horizontally disposed clamping limb 4 is vertically fixed on the open end of turning arm 2, and the end that steel pipe 5 passes heater coil 6 is clamped on the open end of clamping limb 4.
Above-mentioned guider is the guide roller that has V-shaped groove 7 that is arranged on the steel pipe both sides, and guide roller 7 is oppositely arranged on the steel pipe both sides in the horizontal direction.
In the concrete application process, at first will descend the steel pipe of honest material to pass guide roller and heater coil, the steel pipe end that passes guide roller is clamped on the clamping limb, it is at the uniform velocity mobile forward to start the Driven by Hydraulic Cylinder steel pipe then, opening heater coil simultaneously heats steel pipe, plasticity strengthened after steel pipe was heated, be clamped on the clamping limb owing to steel pipe one end simultaneously, and clamping limb is fixedly connected on the turning arm, turning arm can be around the rotating shaft rotation that is fixed on the bearing, so steel pipe is clamped in the common restriction that the movement locus of clamping limb one end is subjected to clamping limb and turning arm and rotating shaft, progressively advance and heating process in the elbow of formation certain diameter, key a bit be heater coil and elbow inner ring side distance less than with the distance of elbow outer ring side, so the temperature of elbow inner ring side is higher than the temperature of elbow outer ring side, to compare with the concentric heating means of elbow steel pipe, the method has been avoided outer ring side excessive thinning and the wrinkling problem of inner ring side effectively, improve the elbow yield rate, reduce economic loss.
Claims (5)
1. 5D manufacture method of elbow comprises in its step: steel plate cutting, reel, welding, shaping, welding procedure head, add fire bending system, heat treatment, groove processing, Non-Destructive Testing, product inspection; Wherein, adding fire bending system operation may further comprise the steps: 1) steel pipe (5) of shaping and welding procedure joint is passed an end that will pass heater coil behind steel pipe guider, the heater coil (6) and be clamped on the rotary positioning apparatus, the other end is clamped on the pusher device; 2) heating power supply of connection heater coil (6); 3) reach to simmer and start the pusher device after the system temperature to drive steel pipe (5) at the uniform velocity mobile along its axis; 4) shut down the back and take out the steel pipe that is simmered into elbow; it is characterized in that: the internal diameter of described heater coil (6) is greater than the diameter of steel pipe (5); and fixedly install with respect to steel pipe pusher device; the axis of heater coil does not overlap with steel pipe (5) axis, and puts with respect to the outer ring lateral deviation after steel pipe (5) bending.
2. a kind of 1.5D manufacture method of elbow according to claim 1 is characterized in that: described heater coil is a single-turn circular coil.
3. a kind of 1.5D manufacture method of elbow according to claim 1, it is characterized in that: described steel pipe rotary positioning apparatus comprises: vertically be arranged on the rotating shaft on the bearing (1), one end is fixedly installed on the turning arm (2) on rotating shaft top, turning arm (2) is horizontally disposed with, horizontally disposed clamping limb (4) is vertically fixed on the open end of turning arm (2), and the end that steel pipe (5) passes heater coil (6) is clamped on the open end of clamping limb (4).
4. a kind of 1.5D manufacture method of elbow according to claim 1 is characterized in that: described guider is the guide roller that has V-shaped groove (7) that is arranged on the steel pipe both sides, and guide roller (7) is oppositely arranged on the steel pipe both sides in the horizontal direction.
5. a kind of 1.5D manufacture method of elbow according to claim 1 is characterized in that: described pusher device is a hydraulic cylinder, and hydraulic cylinder push rod open end is provided with clamping device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101785059A CN101850378B (en) | 2010-05-21 | 2010-05-21 | Manufacturing method of 1.5D elbow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101785059A CN101850378B (en) | 2010-05-21 | 2010-05-21 | Manufacturing method of 1.5D elbow |
Publications (2)
| Publication Number | Publication Date |
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| CN101850378A CN101850378A (en) | 2010-10-06 |
| CN101850378B true CN101850378B (en) | 2011-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010101785059A Active CN101850378B (en) | 2010-05-21 | 2010-05-21 | Manufacturing method of 1.5D elbow |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109807567B (en) * | 2019-03-19 | 2019-11-08 | 南昌航空大学 | A method of improving 1D and following small-bend radius pipe bend straight end length |
| CN113634600B (en) * | 2021-08-13 | 2023-08-04 | 山东中正钢管制造有限公司 | Hot metal detection focusing device for steel pipe production and manufacturing |
| CN115228994B (en) * | 2022-09-20 | 2022-12-13 | 苏州律动游乐设备有限公司 | Method for processing metal elbow connector |
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| CN1954933A (en) * | 2005-10-26 | 2007-05-02 | 竭国忠 | Equipment and method for manufacturing metal large diameter equal wall thickness slit elbow and expanding tube by thermal push |
| CN101219449A (en) * | 2008-01-22 | 2008-07-16 | 大连冶金结晶器有限公司 | Semi-automatic production method of integrally arcuate stainless steel round blank crystallizer water jacket |
| CN201168734Y (en) * | 2007-12-26 | 2008-12-24 | 宁波连通设备制造有限公司 | Apparatus for processing steel thick wall elbow |
| CN101652596A (en) * | 2007-03-30 | 2010-02-17 | 住友金属工业株式会社 | Seamless bend tube, weld joint with seamless straight tube, and method of producing them |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000061529A (en) * | 1998-08-18 | 2000-02-29 | Daido Steel Co Ltd | Bent pipe of austenite stainless steel and manufacture thereof |
| JP2001214990A (en) * | 2000-02-02 | 2001-08-10 | Kubota Corp | Centrifugally cast bent pipe for solid matter transport |
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2010
- 2010-05-21 CN CN2010101785059A patent/CN101850378B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1954933A (en) * | 2005-10-26 | 2007-05-02 | 竭国忠 | Equipment and method for manufacturing metal large diameter equal wall thickness slit elbow and expanding tube by thermal push |
| CN101652596A (en) * | 2007-03-30 | 2010-02-17 | 住友金属工业株式会社 | Seamless bend tube, weld joint with seamless straight tube, and method of producing them |
| CN201168734Y (en) * | 2007-12-26 | 2008-12-24 | 宁波连通设备制造有限公司 | Apparatus for processing steel thick wall elbow |
| CN101219449A (en) * | 2008-01-22 | 2008-07-16 | 大连冶金结晶器有限公司 | Semi-automatic production method of integrally arcuate stainless steel round blank crystallizer water jacket |
Non-Patent Citations (4)
| Title |
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| JP特开2000-61529A 2000.02.29 |
| JP特开2001-214990A 2001.08.10 |
| 张文生等.感应热煨弯管整体加热技术的应用.《机械工程师》.2009,(第7期),第132-133页. * |
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| CN101850378A (en) | 2010-10-06 |
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Effective date of registration: 20201012 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Petroleum Equipment Manufacturing Co.,Ltd. Patentee after: JULONG STEEL PIPE Co.,Ltd. Address before: 300457 building 3, Tianjin Binhai service outsourcing industry park, No. 19 West Ring Road, Tianjin Development Zone Patentee before: CNPC Bohai Petroleum Equipment Manufacturing Co.,Ltd. |
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