CN103949754B - The large-scale box beam welding procedure of cut deal - Google Patents
The large-scale box beam welding procedure of cut deal Download PDFInfo
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- CN103949754B CN103949754B CN201410125686.7A CN201410125686A CN103949754B CN 103949754 B CN103949754 B CN 103949754B CN 201410125686 A CN201410125686 A CN 201410125686A CN 103949754 B CN103949754 B CN 103949754B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
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- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The large-scale box beam solder technology of cut deal, belong to the large groove welding technical field of cut deal, the technical problem solved be to provide a kind of not only guaranteed weldquality but also by weld industry to the large-scale box beam solder technology of minimum cut deal, the technical scheme adopted is: carry out according to following steps: the first step, select welding method, Lincoln weld is adopted to the single groove weld of the main weld on the large-scale box beam of cut deal between lower wing plate and inside and outside web and adpting flange periphery, mixed gas arc welding is adopted to all the other weld seams of the large-scale box beam of cut deal; Second step, selects welding manner, when main weld and single groove weld welding, first at groove back side leg weld seam, then weld after side slope mouth place back chipping outside, during equilateral K V-butt weld to cut deal large-scale box beam inside, first fill up both sides groove, then increase angle welding; 3rd step, selects welding condition; 4th step, controls welding deformation; The present invention is applied to the large-scale box beam of cut deal.
Description
Technical field
The large-scale box beam welding procedure of cut deal, belongs to the large groove welding technical field of cut deal, particularly relates to weldquality and reaches II grade of weld seam requirement in QJ176A, as the welding field of each large-scale box beam in the stage body of main force support structure in movable launch platform.
Background technology
Movable launch platform is that the basic package sent out flow process and be achieved surveyed by rocket of new generation, is the key equipment in ground launch back-up system, primarily of compositions such as stage body, supporting arm, running gear, conversion equipment, umbilical tower, tail end service towers.Wherein stage body is the main force support structure of flat pad, the rocket before and after carrying filling, and row leads the gas-flow that rocket launching produces smoothly.Stage body is made up of upper platform body and the two-layer steel box Welding Structure beam of lower platform body.Each box-girder is all be welded into box-girder by the thick web of 40mm and the thick groups of vanes of 40mm, and inner assembly welding has riser, dividing plate, stiffener, and end is welded with adpting flange.Each depth of beam size is all between 2200 ~ 2750mm, and width dimensions is all between 2500 ~ 3500mm, and length is all at more than 10m, and the longest beam reaches 27.5m; The minimum beam of weight is about 30t, maximum about 140t.Require that the principal welds each other such as web, wing plate, riser and adpting flange are the groove weld of corner joint, bevel angle 50 °.Can find out thus, each beam all belongs to super large, overweight welding structural element, and welding job amount is in process of production large, operating difficulties, and due to the many grooves of weld seam large, it is many to fill amount of metal, welding deformation can be caused large, affect product quality.
The large-scale box beam of cut deal be main group of stage body in movable launch platform will main one-tenth part, belong to bearing member, its material used is generally Q345.Joint form is corner joint, and wherein principal weld form is: the weld seam of web and wing plate and adpting flange periphery is the groove weld of monolateral 50 °, and root face 2mm(is shown in Fig. 3); Web, weld seam between wing plate and riser are equilateral K shape groove, bevel angle 45 °, and root face 2mm(is shown in Fig. 4).The all weldqualities of drawing requirement all meet II grade of joint in QJ176A, and require to carry out ultrasonic examination, and acceptance criteria is B level I class in GB11345-89 standard; The planarity requirements of the upper and lower plane of box beam postwelding is not more than 10mm.As can be seen here, box beam weldquality and welding deformation all require sternly, therefore need in process of production not only to guarantee weldquality but also by weld industry to minimum.
Summary of the invention
The present invention overcomes the deficiency that prior art exists, technical problem to be solved be to provide a kind of need not only to guarantee weldquality in cut deal large-scale box beam production process but also by weld industry to minimum solder technology.
For solving the problems of the technologies described above, the technical solution used in the present invention is: the large-scale box beam welding procedure of cut deal, carries out according to following steps:
The first step, select welding method, Lincoln weld is adopted to the single groove weld of the main weld on the large-scale box beam of cut deal between lower wing plate and inside and outside web and adpting flange periphery, mixed gas arc welding is adopted to all the other weld seams of the large-scale box beam of cut deal;
Second step, select welding manner, when the single groove weld of the main weld inside and outside the large-scale box beam of cut deal between web with upper lower wing plate and adpting flange periphery is welded, first in the angle welding that groove back side weldering 10mm is high, weld after side slope mouth place back chipping outside again, to the equilateral K V-butt weld of cut deal large-scale box beam inside, during welding, first fill up both sides groove, then on the basis of groove welding, increase the angle welding that foot welding height is 15mm;
3rd step, selects welding condition, to the welding condition that the single groove weld of the main weld inside and outside the large-scale box beam of cut deal between web and upper lower wing plate and adpting flange periphery adopts is:
Backside angle weld seam adopts mixed gas arc welding, and welding current is 270 ~ 290A, and arc voltage is 28 ~ 30V, and speed of welding is 300 ~ 400mm/min, and gas flow is 15 ~ 20L/min;
Front adopts Lincoln weld, and wherein ground floor welding current is 520 ~ 560A, and arc voltage is 30 ~ 34V, and speed of welding is 320 ~ 350mm/min; Second layer welding current is 610 ~ 640A, and arc voltage is 30 ~ 34V, and speed of welding is 330 ~ 360mm/min; Third layer welding current is 630 ~ 650A, and arc voltage is 32 ~ 36V, and speed of welding is 320 ~ 360mm/min; 4th layer is 660 ~ 750A to eleventh floor welding current, and arc voltage is 33 ~ 38V, and speed of welding is 340 ~ 400mm/min;
To the welding condition that the equilateral K V-butt weld of cut deal large-scale box beam inside adopts be:
The ground floor welding current of two groove faces is 270 ~ 290A, and arc voltage is 28 ~ 30V, and speed of welding is 300 ~ 400mm/min, and gas flow is 15 ~ 20L/min; Second layer welding current is 280 ~ 300A, and arc voltage is 28 ~ 30V, and speed of welding is 300 ~ 400mm/min, and gas flow is 15 ~ 20L/min; Third layer welding current is 290 ~ 320A, and arc voltage is 29 ~ 31V, and speed of welding is 300 ~ 400mm/min, and gas flow is 15 ~ 20L/min; 4th layer of welding current is 290 ~ 320A, and arc voltage is 29 ~ 31V, and speed of welding is 300 ~ 400mm/min, and gas flow is 15 ~ 20L/min;
The welding current of newly-increased angle welding is 280 ~ 320A, and arc voltage is 29 ~ 32V, and speed of welding is 300 ~ 400mm/min, and gas flow is 15 ~ 20L/min; 4th step, control welding deformation, concrete control mode is as follows:
A. every meter of 1 millimeter of reserved welding contracted quantity is pressed before box beam welding.
B. during welding by several welder with box beam beam length direction center line for benchmark to two ends with gauge symmetry welding, by welder's combination of two, the weld seam of Same Part both sides is welded with same specification simultaneously during welding simultaneously.
When c. welding, first weld the weld seam inside box beam, then weld the weld seam outside box beam, and by after all weld seam backing weldings, then weld the weld seam of all the other each layers.
At adpting flange open-mouth mounting process strut when d. welding.
Compared to the prior art the present invention has following beneficial effect: owing to requiring that all weld seams of the large-scale box beam of cut deal all meet II grade of joint in QJ176A, this just needs butt welded seam through welding, but owing to limiting by the large-scale box beam structure of cut deal, when to box beam internal weld seams back chipping, operating difficulties, back chipping is not thorough, is difficult to ensure weldquality.Therefore, when the single groove weld of the main weld inside and outside the large-scale box beam of cut deal between web with upper lower wing plate and adpting flange periphery is welded, first in the angle welding that groove back side weldering 10mm is high, then weld after side slope mouth place back chipping outside, backside angle weld seam adopts mixed gas arc welding; To the equilateral K V-butt weld of cut deal large-scale box beam inside, both sides groove is first filled up during welding, on the basis of groove welding, increase the angle welding that foot welding height is 15mm again, allowing root face place to have has the non-penetration phenomenon of 5mm at the most, and welding manner so can guarantee weldquality;
Because the large-scale box beam of cut deal is welding structural element, weld seam quantity is many and long, and groove is large and dark, and filling amount of metal is many.If particularly Control Welding Process is bad for this structure production process, welding deformation can be caused very large, affect Total Product quality.Therefore take following four kinds of methods to control welding deformation during the welding of cut deal large-scale box beam: before adopting welding when welding by every meter of 1 millimeter of reserved welding contracted quantity, symmetrical welding, the rational welding sequence of selection and welding time at adpting flange open-mouth mounting process strut, adpting flange is rigidly fixed; In order to meet the size at adpting flange place, guarantee that assembling smoothly, adpting flange will carry out decorateeing welding after all wing plates, web, riser etc. have welded again.Therefore, on welding when each of lower wing plate, inside and outside web, riser etc., adpting flange place belongs to uncovered state, is out of shape larger during welding herein.For controlling welding deformation, decorateeing suitable process support rods at open-mouth during welding, welding deformation herein can be controlled well;
In sum, the invention solves the welding difficult problem in the large-scale box beam production process of cut deal, can either guarantee that weldquality by weld industry to minimum, can improve a delivery-check qualified rate of weld seam and the total quality of the large-scale box beam of cut deal again.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is the structural representation of the large-scale box beam of cut deal.
Fig. 2 is that the A-A of Fig. 1 is to schematic diagram.
Fig. 3 is bevel welding point schematic diagram.
Fig. 4 is equilateral K shape groove-weld joint schematic diagram.
In figure, 1 is adpting flange, and 2 is upper flange, and 3 is lower wing plate, and 4 is endosternum, and 5 is outer web, and 6 is riser.
Detailed description of the invention
As Figure 1-Figure 4, the large-scale box beam welding procedure of cut deal, carry out according to following steps:
The first step, select welding method, Lincoln weld is adopted to the single groove weld of the main weld on the large-scale box beam of cut deal between lower wing plate and inside and outside web and adpting flange periphery, mixed gas arc welding is adopted to all the other weld seams of the large-scale box beam of cut deal;
Second step, select welding manner, when the single groove weld of the main weld inside and outside the large-scale box beam of cut deal between web with upper lower wing plate and adpting flange periphery is welded, first in the angle welding that groove back side weldering 10mm is high, weld after side slope mouth place back chipping outside again, to the equilateral K V-butt weld of cut deal large-scale box beam inside, during welding, first fill up both sides groove, then on the basis of groove welding, increase the angle welding that foot welding height is 15mm;
3rd step, selects welding condition, to the welding condition that the single groove weld of the main weld inside and outside the large-scale box beam of cut deal between web and upper lower wing plate and adpting flange periphery adopts is:
Backside angle weld seam adopts mixed gas arc welding, and welding current is 270 ~ 290A, and arc voltage is 28 ~ 30V, and speed of welding is 300 ~ 400mm/min, and gas flow is 15 ~ 20L/min;
Front adopts Lincoln weld, and wherein ground floor welding current is 520 ~ 560A, and arc voltage is 30 ~ 34V, and speed of welding is 320 ~ 350mm/min; Second layer welding current is 610 ~ 640A, and arc voltage is 30 ~ 34V, and speed of welding is 330 ~ 360mm/min; Third layer welding current is 630 ~ 650A, and arc voltage is 32 ~ 36V, and speed of welding is 320 ~ 360mm/min; 4th layer is 660 ~ 750A to eleventh floor welding current, and arc voltage is 33 ~ 38V, and speed of welding is 340 ~ 400mm/min;
To the welding condition that the equilateral K V-butt weld of cut deal large-scale box beam inside adopts be:
The ground floor welding current of two groove faces is 270 ~ 290A, and arc voltage is 28 ~ 30V, and speed of welding is 300 ~ 400mm/min, and gas flow is 15 ~ 20L/min; Second layer welding current is 280 ~ 300A, and arc voltage is 28 ~ 30V, and speed of welding is 300 ~ 400mm/min, and gas flow is 15 ~ 20L/min; Third layer welding current is 290 ~ 320A, and arc voltage is 29 ~ 31V, and speed of welding is 300 ~ 400mm/min, and gas flow is 15 ~ 20L/min; 4th layer of welding current is 290 ~ 320A, and arc voltage is 29 ~ 31V, and speed of welding is 300 ~ 400mm/min, and gas flow is 15 ~ 20L/min;
The welding current of newly-increased angle welding is 280 ~ 320A, and arc voltage is 29 ~ 32V, and speed of welding is 300 ~ 400mm/min, and gas flow is 15 ~ 20L/min; 4th step, control welding deformation, concrete control mode is as follows:
A. every meter of 1 millimeter of reserved welding contracted quantity is pressed before box beam welding.
B. during welding by several welder with box beam beam length direction center line for benchmark to two ends with gauge symmetry welding, by welder's combination of two, the weld seam of Same Part both sides is welded with same specification simultaneously during welding simultaneously.
When c. welding, first weld the weld seam inside box beam, then weld the weld seam outside box beam, and by after all weld seam backing weldings, then weld the weld seam of all the other each layers.
At adpting flange open-mouth mounting process strut when d. welding.
The number of plies that the single groove weld front of the main weld inside and outside the large-scale box beam of described cut deal between web and upper lower wing plate and adpting flange periphery is carried out needed for Lincoln weld is regulated according to actual needs, but terminates all to adopt same welding condition to last one deck from the 4th layer.
When the single groove weld of the main weld inside and outside the large-scale box beam of described cut deal between web with upper lower wing plate and adpting flange periphery is welded, first in the angle welding that groove back side weldering 10mm is high, to the equilateral K V-butt weld of cut deal large-scale box beam inside, first fill up both sides groove during welding, then on the basis of groove welding, increase the angle welding that foot welding height is 15mm; Aforesaid angle welding all adopts mixed gas arc welding; Also mixed gas arc welding is adopted to the riser welding of the large-scale box beam of cut deal.
The virtual condition of combination product, according to welding experience in the past and through engineer testing, finally determines that box beam welding is front by every meter of 1 millimeter of reserved welding contracted quantity, can guarantee that box beam postwelding length dimension meets drawing requirement.
Claims (1)
1. the large-scale box beam welding procedure of cut deal, is characterized in that carrying out according to following steps:
The first step, select welding method, Lincoln weld is adopted to the single groove weld of the main weld on the large-scale box beam of cut deal between lower wing plate and inside and outside web and adpting flange periphery, mixed gas arc welding is adopted to all the other weld seams of the large-scale box beam of cut deal;
Second step, select welding manner, when the single groove weld of the main weld inside and outside the large-scale box beam of cut deal between web with upper lower wing plate and adpting flange periphery is welded, first in the angle welding that groove back side weldering 10mm is high, weld after side slope mouth place back chipping outside again, to the equilateral K V-butt weld of cut deal large-scale box beam inside, during welding, first fill up both sides groove, then on the basis of groove welding, increase the angle welding that foot welding height is 15mm;
3rd step, selects welding condition, to the welding condition that the single groove weld of the main weld inside and outside the large-scale box beam of cut deal between web and upper lower wing plate and adpting flange periphery adopts is:
Backside angle weld seam adopts mixed gas arc welding, and welding current is 270 ~ 290A, and arc voltage is 28 ~ 30V, and speed of welding is 300 ~ 400mm/min, and gas flow is 15 ~ 20L/min;
Front adopts Lincoln weld, and wherein ground floor welding current is 520 ~ 560A, and arc voltage is 30 ~ 34V, and speed of welding is 320 ~ 350mm/min; Second layer welding current is 610 ~ 640A, and arc voltage is 30 ~ 34V, and speed of welding is 330 ~ 360mm/min; Third layer welding current is 630 ~ 650A, and arc voltage is 32 ~ 36V, and speed of welding is 320 ~ 360mm/min; 4th layer is 660 ~ 750A to eleventh floor welding current, and arc voltage is 33 ~ 38V, and speed of welding is 340 ~ 400mm/min;
To the welding condition that the equilateral K V-butt weld of cut deal large-scale box beam inside adopts be:
The ground floor welding current of two groove faces is 270 ~ 290A, and arc voltage is 28 ~ 30V, and speed of welding is 300 ~ 400mm/min, and gas flow is 15 ~ 20L/min; Second layer welding current is 280 ~ 300A, and arc voltage is 28 ~ 30V, and speed of welding is 300 ~ 400mm/min, and gas flow is 15 ~ 20L/min; Third layer welding current is 290 ~ 320A, and arc voltage is 29 ~ 31V, and speed of welding is 300 ~ 400mm/min, and gas flow is 15 ~ 20L/min; 4th layer of welding current is 290 ~ 320A, and arc voltage is 29 ~ 31V, and speed of welding is 300 ~ 400mm/min, and gas flow is 15 ~ 20L/min;
The welding current of newly-increased angle welding is 280 ~ 320A, and arc voltage is 29 ~ 32V, and speed of welding is 300 ~ 400mm/min, and gas flow is 15 ~ 20L/min;
4th step, control welding deformation, concrete control mode is as follows:
A. every meter of 1 millimeter of reserved welding contracted quantity is pressed before box beam welding;
B. during welding by several welder with box beam length direction center line for benchmark to two ends with gauge symmetry welding, by welder's combination of two, the weld seam of Same Part both sides is welded with same specification simultaneously during welding simultaneously;
When c. welding, first weld the weld seam inside box beam, then weld the weld seam outside box beam, and by after all weld seam backing weldings, then weld the weld seam of all the other each layers;
At adpting flange open-mouth mounting process strut when d. welding.
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| CN104625455B (en) * | 2015-01-27 | 2016-08-17 | 鞍钢建设集团有限公司 | A kind of welding procedure controlling grooved crossbeam welding deformation |
| CN105798436A (en) * | 2016-05-18 | 2016-07-27 | 张家港市恒强冷却设备有限公司 | Fillet welding method of pipe plates in cooler |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57103785A (en) * | 1980-12-19 | 1982-06-28 | Nippon Kokan Kk <Nkk> | Production of box column |
| JPS58168485A (en) * | 1982-03-31 | 1983-10-04 | Nippon Kokan Kk <Nkk> | Production of structural material of box type section |
| CN101664847A (en) * | 2009-08-10 | 2010-03-10 | 河南天丰钢结构有限公司 | Method for producing box beam/column with steel structure |
| CN101780591A (en) * | 2010-04-06 | 2010-07-21 | 河南天丰钢结构有限公司 | Twin arc submerged arc welding method for thick plate box beam/pillar |
| CN102554416A (en) * | 2011-12-22 | 2012-07-11 | 中国船舶重工集团公司第七二五研究所 | Submerged-arc welding root welding and back chipping process of thick plate with K-type groove |
| JP2012210652A (en) * | 2011-03-18 | 2012-11-01 | Arcreate:Kk | Direct connection method of beam and inner diaphragm with protrusion for steel structure column-beam joint part |
| CN102896472A (en) * | 2012-10-23 | 2013-01-30 | 中国二十二冶集团有限公司 | Manufacturing method for box type pillar beam |
-
2014
- 2014-03-31 CN CN201410125686.7A patent/CN103949754B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57103785A (en) * | 1980-12-19 | 1982-06-28 | Nippon Kokan Kk <Nkk> | Production of box column |
| JPS58168485A (en) * | 1982-03-31 | 1983-10-04 | Nippon Kokan Kk <Nkk> | Production of structural material of box type section |
| CN101664847A (en) * | 2009-08-10 | 2010-03-10 | 河南天丰钢结构有限公司 | Method for producing box beam/column with steel structure |
| CN101780591A (en) * | 2010-04-06 | 2010-07-21 | 河南天丰钢结构有限公司 | Twin arc submerged arc welding method for thick plate box beam/pillar |
| JP2012210652A (en) * | 2011-03-18 | 2012-11-01 | Arcreate:Kk | Direct connection method of beam and inner diaphragm with protrusion for steel structure column-beam joint part |
| CN102554416A (en) * | 2011-12-22 | 2012-07-11 | 中国船舶重工集团公司第七二五研究所 | Submerged-arc welding root welding and back chipping process of thick plate with K-type groove |
| CN102896472A (en) * | 2012-10-23 | 2013-01-30 | 中国二十二冶集团有限公司 | Manufacturing method for box type pillar beam |
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Address after: No. 6 mailbox of Changzhi City, Shanxi Province, Shanxi Co-patentee after: China Academy of Launch Vehicle Technology Patentee after: Shanxi spaceflight Qinghua Equipment Co., Ltd. Address before: No. 6 mailbox of Changzhi City, Shanxi Province, Shanxi Co-patentee before: China Academy of Launch Vehicle Technology Patentee before: Qinghua Machinery Plant, Changzhi |
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