CN101214511A - Large straight-line joint submerged arc welding tube fast production process - Google Patents
Large straight-line joint submerged arc welding tube fast production process Download PDFInfo
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- CN101214511A CN101214511A CNA200710033068XA CN200710033068A CN101214511A CN 101214511 A CN101214511 A CN 101214511A CN A200710033068X A CNA200710033068X A CN A200710033068XA CN 200710033068 A CN200710033068 A CN 200710033068A CN 101214511 A CN101214511 A CN 101214511A
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Abstract
The invention provides a big vertical masonry joint hidden arc welding tube fast production method belonging to the processing and forming fields of metal plate and relating to the bending processing and forming technology of metal plate which is mainly used for the fast production of the big vertical masonry joint hidden arc welding tube. The invention adopts continuous array rollers of a coil stock to form, high frequency prewelding on line, then utilizing a off-line automatic submerged arc welding to carry out the inner welding and outer welding of the welded pipe as well as expanding, water pressure and nondestructive examinations; thereby realizing the high efficiency production of the big vertical masonry joint hidden arc welding tube products. The invention adopts a plate-coiling mode to supply materials, cutting materials, shearing and butt welding, utilizes milling edge to finish the online-processing of a divided edge beside the plate, primary roller forming, fine roller forming, high frequency prewelding after a rough material is continuously formed by the array rollers and sawing as well as baiting and the steel tube rough material needed by a hidden arc welding working procedure can be acquired through online dimension fixing and cutting off; hidden arc inner welding and hidden arc outer welding, inner control examination, expending, water pressure test, repairing ends by machinery are carried out on the steel rough material to exam to acquire a finished product. The technique has a reasonable design and has the advantages of good steel tube forming quality and high production efficiency as adopting the array rollers to form and high frequency prewelding; thereby ensuring the overall production efficiency of the technique and the welding line quality can also be ensured reliably.
Description
Technical field
Large straight-line joint submerged arc welding tube fast production process of the present invention belongs to the metallic plate manufacture field, relates to metallic plate bending, pipe welding processing technology, is mainly used in the quick production of large straight-line joint submerged arc welding tube.
Background technology
ERW comprises heavy caliber straight-line joint submerged arc welding tube and two kinds of products of high-frequency straight seam welded pipe, the production of two kinds of products is respectively corresponding to different pipe molding procedure and pipe welding sequence, production efficiency and weldquality exist than big difference, in engineering construction, can customize above-mentioned two series products respectively according to the difference that technical conditions require.Therefore, two series products respectively have its particular market demand more than.
The large straight-line joint submerged arc welding tube production technology mainly comprises two kinds at present, i.e. UOE technology and JCOE technology.The molding procedure of these two kinds of technologies has all utilized large pressing machine that single steel plate is carried out brake forming one by one, after obtaining tubular body, pass through operations such as prewelding, interior weldering, outside weld, hole enlargement, detection successively, obtain the large straight-line joint submerged arc welding tube product of required specification at last.Because submerged-arc welding is consumable electrode protection weldering, used solder flux is that the chemical metallurgy performance according to welding technological properties, solder flux decides the weld metal performance.In the metallurgical reaction of weld seam molten bath, solder flux can be to the certain alloying element of weld metal transition, fill up a part by the element of scaling loss, strengthens the toughness and the intensity of weld seam.In the metallurgical reaction process in weld seam molten bath, solder flux also has good slaggability, and solder flux slag protection molten bath is not subjected to the erosion of extraneous pernicious gas.In addition, solder flux also has very strong dirt eliminating function, and pernicious gas in the molten bath and contaminant removal are gone out, and obtains high-quality weld seam.Therefore the automatic submerged arc welding weldquality is good, reliable and stable.But the automatic submerged arc welding speed of welding is lower, add the processing one by one that the pipe molding mode only is confined to the plate material, thereby the integral production efficient in the production process is difficult to be significantly improved.An important feature of high frequency vertical masonry joint pipe is that production efficiency is very high, and one of the main reasons is to have adopted the continuous row-roll forming process of coil of strip material multimachine frame, and it is fast to have a shaping speed, tubular advantage such as good; Former two is exactly to have adopted the ratio-frequency welding technology therefore, because electric current is concentrated and is distributed in the very narrow zone of surface of the work during high-frequency welding, so just can use the electric current more much smaller (energy dissipation is also much smaller) to make the weld zone reach welding temperature than common electrical welding resistance, thereby can use smaller electrode angle head and angle head pressure, greatly improve speed of welding and welding efficiency.The production of high frequency vertical masonry joint pipe at present mainly is to adopt ERW to produce unit, but this technology only is confined to the production of ratio-frequency welding steel pipe single kind product, does not also possess the production capacity of being engaged in the heavy caliber straight-line joint submerged arc welding tube at present.
Summary of the invention
The objective of the invention is to avoid weak point of the prior art and a kind of steel plate forming working (machining) efficiency height is provided, adopt the coil of strip material continuously shaped, and carry out the method that big longitudinal submerged arc welded pipe product is produced fast, on the basis that improves constantly of high-frequency straight seam welded pipe production technology, a kind of new method of large straight-line joint submerged arc welding tube production has been proposed.
The objective of the invention is to reach by following measure, adopt the continuous row-roll forming process of coiled strip, online high frequency prewelding utilizes off-line automatic submerged arc welding to carry out the interior weldering and the outside weld of welded tube then, hole enlargement, hydraulic pressure, Non-Destructive Testing, thereby the High-efficient Production of realization large straight-line joint submerged arc welding tube product.The present invention adopts coiled sheet feed mode, opens material, shears butt welding, utilization is milled the limit and is finished edges of boards groove on-line machining, roller pre-profiling, roller precisive shaped, blank is the high frequency prewelding after row's roller is continuously shaped, and sawing is by online fixed ruler cutting, can obtain the needed steel tube blank of submerged-arc welding operation, subsequently the steel tube blank that is obtained be carried out welding in the submerged arc, the submerged arc outside weld, carry out internal control and detect hole enlargement, the water pressure test, machinery is repaiied end, and check obtains finished product.
Weldering, submerged arc outside weld, internal control detection, hole enlargement in the submerged arc that the present invention can be carried out on steel tube blank, the water pressure test, machinery is repaiied end, operations such as check adopt the design of off-line station, and obtain steel tube blank quantity by fixed ruler cutting and carry out multi-thread corresponding configuration, thereby realize the quick production of large straight-line joint submerged arc welding tube.
The present invention has utilized characteristics such as row-roll forming process production efficiency height, good forming effect.Guaranteeing that shaping machine set produces big longitudinal submerged arc welded pipe simultaneously, can also satisfy the demand of the right ratio-frequency welded tube in market, reach the purpose of dual-use.
Technological design of the present invention is reasonable, owing to adopted row-roll forming process, high frequency prewelding, the steel pipe Forming Quality is good, production efficiency is high, thereby guarantees the integral production efficient of this technology, and weldquality is also reliably guaranteed.
Description of drawings
Accompanying drawing 1 is a process chart of the present invention.
Accompanying drawing 2 is Process configuration schematic diagrames of the present invention.
The specific embodiment:
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, coiled sheet feed mode of the present invention is opened material, shear butt welding, utilization is milled the limit and is finished edges of boards groove on-line machining, roller pre-profiling, the roller precisive shaped, blank is the high frequency prewelding after row's roller is continuously shaped, sawing, by online fixed ruler cutting, can obtain the needed steel tube blank of submerged-arc welding operation, in carrying out submerged arc, welds steel tube blank, the submerged arc outside weld is carried out internal control and is detected hole enlargement, the water pressure test, machinery is repaiied end, and check obtains finished product.
As shown in Figure 2, Process configuration of the present invention, coil of strip feeding 1, groove mills limit 2, pony roughing mill 3, row-roll forming process frame 4, finishing stand 5, high frequency prewelding 6, heat treatment section unit 7, water-cooled section 8, outside weld unit 9, internal welding machine group 10, machinery expanding unit 11, water pressure test unit 12. fixed ruler cutting section 13, sizing unit 14.
The present invention must be that bevel for welding is processed by certain size to the pipe edge before moulding and welding, and according to the difference of official's base thickness, the shape of bevel for welding is also different.The following groove of wall thickness 8mm can be processed into V-type, and bevel angle is 55～60, and the above groove of wall thickness 10mm should be processed into U-shaped, and two kinds of groove shapes all should leave the root face of 1.5～20.mm.
The present invention adopts the high frequency prewelding, because the kelvin effect and the approach effect of high frequency electric, electric current concentrates on the root face at pipe edge, temperature is instantaneous to be heated to 1350 ℃～1400 ℃, the welding extruding force of this mode requires the pressure less than routine, 15～20Mpa, burr requires to remove clean in it.The high frequency prewelding is as the back welding of submerged-arc welding, the weld seam of the steel pipe of pre-postwelding must find the crack through checking, burn and the defective of incomplete fusion is wanted repair welding, just can enter before the submerged-arc welding submerged arc welding, need burn-on at the steel pipe seam two ends and draw the blow-out board, prevent to draw blow-out and cause the arc crater defective.
Claims (5)
1. a large straight-line joint submerged arc welding tube fast production process is characterized in that coiled sheet feed mode, opens material, shear butt welding, utilization is milled the limit and is finished edges of boards groove on-line machining, roller pre-profiling, the roller precisive shaped, blank is the high frequency prewelding after row's roller is continuously shaped, sawing, weld in steel tube blank carries out submerged arc, the submerged arc outside weld is carried out internal control and is detected, hole enlargement, the water pressure test, machinery is repaiied end, and check obtains finished product.
2. large straight-line joint submerged arc welding tube fast production process according to claim 1, it is characterized in that in the submerged arc that steel tube blank carries out, welding, the submerged arc outside weld, carrying out internal control detects, hole enlargement, the water pressure test, machinery is repaiied end, inspection process adopts the design of off-line station, and obtains steel tube blank quantity by fixed ruler cutting and carry out multi-thread corresponding configuration.
3. large straight-line joint submerged arc welding tube fast production process according to claim 1 is characterized in that before moulding and welding the pipe edge being processed, and groove is processed into V-type, and bevel angle is 55～60, and the groove shape all leaves root face.
4. large straight-line joint submerged arc welding tube fast production process according to claim 1 is characterized in that before moulding and welding the pipe edge being processed, and groove is processed into U-shaped, and the groove shape leaves root face.
5. large straight-line joint submerged arc welding tube fast production process according to claim 1 is characterized in that the back welding of high frequency prewelding as submerged-arc welding, enters before the submerged arc welding, burn-ons at the steel pipe seam two ends and draws the blow-out board.
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| CN102172814A (en) * | 2011-01-10 | 2011-09-07 | 崔建立 | Method for manufacturing longitudinal submerged arc welded pipe |
| CN102274871A (en) * | 2011-08-02 | 2011-12-14 | 太原华科信冶金成套设备有限公司 | Method and equipment for producing longitudinal submerged arc welded pipe |
| CN102303229A (en) * | 2011-08-02 | 2012-01-04 | 太原华科信冶金成套设备有限公司 | Continuous feeding method and device |
| CN102407247A (en) * | 2010-09-26 | 2012-04-11 | 上海月月潮钢管制造有限公司 | Manufacturing method of steel longitudinal submerged arc welding steel pipe for high-temperature and high-pressure boiler |
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| CN104439672A (en) * | 2014-11-14 | 2015-03-25 | 番禺珠江钢管（连云港）有限公司 | High frequency prewelding technology of longitudinal submerged arc welded pipe |
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| CN116493433A (en) * | 2023-06-15 | 2023-07-28 | 张家港沙龙精密管业有限公司 | Intelligent management method and system for customizing steel pipe manufacturing process |
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| CN114535939A (en) * | 2022-03-22 | 2022-05-27 | 湖南胜利湘钢钢管有限公司 | Method for manufacturing longitudinal submerged arc welded pipe |
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| CN116141024A (en) * | 2023-04-21 | 2023-05-23 | 太原科技大学 | Medium longitudinal submerged arc welded pipe production equipment and technology |
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Application publication date: 20080709 Assignee: Panyu Zhujiang steel pipe (Lianyungang) Co., Ltd. Assignor: Zhujiang Steel Pipe Co., Ltd., Panyu Contract record no.: 2016320000019 Denomination of invention: Large straight-line joint submerged arc welding tube fast production process Granted publication date: 20090722 License type: Common License Record date: 20160129 |
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Effective date of registration: 20180509 Address after: 222002 office building, 396 Jiangsu Avenue, Xuxu New District, Lianyungang, Jiangsu Patentee after: Panyu Zhujiang steel pipe (Lianyungang) Co., Ltd. Address before: 511450 Guangdong Guangzhou Panyu District Shiji Town Qinghe Road Panyu Zhujiang Steel Tube Co., Ltd. Patentee before: Zhujiang Steel Pipe Co., Ltd., Panyu |
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