CN104551344A - Automatic welding method of loop-weld structured but joints - Google Patents
Automatic welding method of loop-weld structured but joints Download PDFInfo
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- CN104551344A CN104551344A CN201310499795.0A CN201310499795A CN104551344A CN 104551344 A CN104551344 A CN 104551344A CN 201310499795 A CN201310499795 A CN 201310499795A CN 104551344 A CN104551344 A CN 104551344A
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- welding
- bottoming
- circumferential weld
- automatic
- banjo fixing
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Classifications
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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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
-
- 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
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- 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
- B23K9/235—Preliminary treatment
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses an automatic welding method of loop-weld structured but joints. The automatic welding method includes machining an edge before welding, positioning before welding and protectively preheating before welding; adjusting the position of a welding gun after assembly so as to enable the welding gun to be above a weld bead; self-melting, bottoming and welding; welding a cover surface; slowing down cooling and successively treating thermally and the like. The automatic welding method can realize bottoming and cover surface welding formation of the loop weld structure 4-12 mm in thickness, production efficiency is improved by 200-300%, and one-time welding success rate of products is greatly increased.
Description
Technical field
The invention belongs to welding procedure field, particularly a kind of automatic soldering method being applicable to metal material circumferential weld structure banjo fixing butt jointing.
Background technology
In space industry, heavy thickness metal material is widely used, and especially the welding of circumferential weld structure often needs to adopt multilayer, multi-pass welding welding procedure.Manual welding is due to larger to welder's technical ability dependence, be difficult to stability of ensuring the quality of products, and for broad in the middle, that two ends bore is little structure, after having welded, prime coat faults repair is very difficult, as being the circumferential weld of 20mm for diameter, thickness is the welding of the banjo fixing butt jointing of 7mm, and sealing run cob webbing, the defect such as lack of penetration often occur.But because workpiece two ends diameter is very little, welding seam distance opening is very long, so reprocess very difficulty behind.
Summary of the invention
The problem that the present invention solves is that existing welding line structure welding procedure is stablized, and welding quality is not high.For solving described problem, the invention provides a kind of circumferential weld structure banjo fixing butt jointing automatic welding method.
Circumferential weld structure banjo fixing butt jointing automatic welding method provided by the invention, comprises the steps:
1) treat welder's part and carry out retaining wall on slope;
2) according to product structure requirement, position weldering, fit-up gap is 0 ~ 1.2mm;
3) according to material welding characteristic, be confirmed whether to carry out the pre-heat treatment and preheat temperature, suitable preheat temperature is set, during preheating, take gas shield measure;
4) by preheated workpiece or do not need the workpiece of preheating to be loaded on rotary tooling;
5) adjust welding torch position after assembling, make welding gun be positioned at above welding bead;
6), after the source of welding current starting the arc, start bottoming welding, workpiece to be welded at the uniform velocity rotates, under the effect of electric arc heat, and welding bead both sides metal molten, under capillary effect, both sides metal forms molten bath, last Step crystallization, forms weld seam;
7), after bottoming welding, cover welding is carried out.
Further, in described step 1), groove is single V groove with root face or stairstepping groove; Bottom described single V groove with root face, root face height is 1.5 ~ 2mm, and bevel angle is 20 ° ~ 60 °; Bottom described stairstepping groove, root face height is 0.5 ~ 2.3mm, and monolateral root face width is 2 ~ 5mm, and top bevel angle is 10 ° ~ 60 °.
Further, bottoming in described step 6) welding adopt automatic tungsten anode argon arc welding connect in technique from fusion welding, welding process welding gun is positioned at above workpiece to be welded; After the starting the arc, electric arc stops 1 ~ 2s workpiece just to start to rotate, and ensures starting the arc fusion penetration, after bottoming has been welded, enters cover welding operation; Cover welding takes the mode of torch swinging to realize capping shaping, and amplitude of fluctuation is 0.2 ~ 1.2mm.
Further, when notch cuttype groove, electric current is 40A ~ 150A, and sealing wire speed is 150mm/min ~ 250mm/min, and argon flow amount is 7L/min ~ 15L/min.
Further, when adopting Y type groove, electric current is 150A ~ 220A, and sealing wire speed is 150mm/min ~ 250mm/min, and argon flow amount is 7L/min ~ 15L/min, back side argon flow amount 4L/min ~ 13L/min.
Further, after bottoming welding, take in following two kinds of modes that any one enters cover welding operation:
Mode 1: not blow-out after bottoming welding, directly enters cosmetic welding, rotary tooling rotates and does not stop, and electric current gradual change is to cover welding electric current, and wire feeding motor rotates, and starts wire feed, and arc welding gun head swings, and starts welding;
Mode 2: after bottoming welding forms joint, take the mode blow-out of gradual change, readjust welding parameter after blow-out and carry out cover welding.
Further, the technological parameter of described cover welding is: welding current is 150A ~ 180A, and sealing wire speed is 140mm/min ~ 220mm/min, and argon flow amount is 9L/min ~ 15L/min.
Further, in welding process, adopt two sections of methods of sealing to realize inner inflatable protection, sealing two ends adopts special plug, and the external air inlet pipe of one end plug, the plug of one end has venthole in addition.
Further, described workpiece to be welded is 4 ~ 12mm; Groove is turnery processing, and both sides root face difference in size is not more than 0.2mm.
Advantage of the present invention comprises:
The requirement of metal material circumferential weld structure banjo fixing butt jointing high-quality welding can be realized; and by processing different groove size, adjustment rotary tooling, welding condition; protection plug size; complete different-diameter; different-thickness, the high-quality welding of the middle gauge circumferential weld structure banjo fixing butt jointing of different metal material.
Test verified, the present invention can match with other welding procedures and also can be used alone, and meets the circumferential weld structure docking street corner automation weldering that material thickness is 5 ~ 12mm, and adapts in enormous quantities, many specifications need of production.
Accompanying drawing explanation
Fig. 1 is the welding schematic diagram of the circumferential weld structure banjo fixing butt jointing automatic welding method that the embodiment of the present invention provides;
The groove schematic diagram formed in the circumferential weld structure banjo fixing butt jointing automatic welding method that Fig. 2 provides for first embodiment of the invention;
The joint schematic diagram that the circumferential weld structure banjo fixing butt jointing automatic welding method that Fig. 3 provides for first embodiment of the invention is formed;
The groove schematic diagram formed in the circumferential weld structure banjo fixing butt jointing automatic welding method that Fig. 4 provides for second embodiment of the invention;
The joint schematic diagram that the circumferential weld structure banjo fixing butt jointing automatic welding method that Fig. 5 provides for second embodiment of the invention is formed.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated.
Fig. 1 is the welding schematic diagram of welding method in the embodiment of the present invention, and as shown in Figure 1, the first workpiece 1 to be welded and the second workpiece 2 to be welded dock, and form joint to be welded; First workpiece 1 to be welded non-butt end the first plug 3 is housed, described first plug 3 has venthole; The second plug 4 is equipped with in the non-butt end of the second workpiece 2 to be welded, and described second plug 4 is equipped with external breather pipe; The positive butt welded seam of welding gun 6, welding gun 6 accompanies tungsten electrode 7.
embodiment 1
The high-quality automatic welding method of a kind of circumferential weld structure banjo fixing butt jointing that the present embodiment provides, the 30CrMnSiA steel assembly of institute's welding work pieces to be thickness be 8mm, internal diameter is mutation structure, spout diameter is 5mm, welding portion internal diameter is 40mm, defect cannot be repaired behind, and welding one-time success rate requires higher.
Be the making of the two part circumferential weld structure banjo fixing butt jointings of 700mm for length, as shown in Figures 2 and 3, the present embodiment carries out according to following steps:
1) part interface to be welded is processed into single V groove with root face, root face thickness is 2mm, and angle of bevel is 45 °.
2) position weldering, utilize the high ferros such as V-arrangement to make tubular construction part to be welded coaxial, two ends back filled argon is protected, and sealing two ends adopts special plug, and the external air inlet pipe of one end plug, the plug of one end has venthole in addition.Behind location, fit-up gap is 1mm.
3) weld preheating, adopt baking oven, preheat temperature is 275 °, insulation 1h, and during preheating, two ends protection gas plug still links closely two ends.
Can be determined by the phosphorus content in welding material the need of preheating before welding, specific standards is well known to those skilled in the art, is not described in detail in this.
4) assembled product is on scroll chuck, and during welding, welding gun is positioned at workpiece upper end to be welded always, and tungsten electrode height is 1.1mm, and argon shield flow in front is 8L/min, and back side argon flow amount is 6L/min, and welding current is 195A, and sealing wire speed is 200mm/min.
5) bottoming welding is taked from fusion welding, and after the source of welding current starting the arc, the electric arc time of staying is 1s, treat that girth welding workpiece at the uniform velocity rotates, under the effect of electric arc heat, welding bead both sides metal molten, under capillary effect, both sides metal forms molten bath, last Step crystallization, forms weld seam; After welding one circle, blow-out starts 30mm after attenuation points is positioned at arcing point, and bottoming welding current attenuation curve is notch cuttype gradual change.
6) enter cover welding operation, take the mode of torch swinging to realize capping and be shaped, amplitude of fluctuation is 0.1 ~ 1mm.Welding wire is H18CrMoA, and welding current is 140A, and wire feed rate is 80cm/min, speed of welding 200m/min.
7), in baking oven when workpiece being placed on after welding preheating, cool with baking oven.
8), in postwelding 8 hours, modulation heat treatment is carried out.
embodiment 2
The preferred embodiment of the present invention provides a kind of high-quality automatic welding method of circumferential weld structure banjo fixing butt jointing, and institute's throat thickness is 4mm 20 steel assembly, and diameter is 100mm, for length is the two tube components welding of 1200mm.
Because length is longer, be difficult to enter inside and reprocess.As shown in Figure 4, Figure 5, the present embodiment carries out according to following steps:
1) part interface to be welded is processed into notch cuttype groove, root face height is 1.3mm, and monolateral slope root face width is 4mm.Top bevel angle is 45 °
2) position weldering, utilize the high ferros such as V-arrangement to make tubular construction part to be welded coaxial, two ends back filled argon is protected, and sealing two ends adopts special plug, and the external air inlet pipe of one end plug, the plug of one end has venthole in addition.Behind location, fit-up gap is 0.3mm.
3) assembled product is on scroll chuck, and during welding, welding gun is positioned at workpiece upper end to be welded always, and tungsten electrode height is 0.8mm, and plug is filled at two ends.Back side argon flow amount is 6L/min, and welding current is 60A, and sealing wire speed is 200mm/min.
5) bottoming welding is taked from fusion welding, and after the source of welding current starting the arc, the electric arc time of staying is 1.2s, workpiece at the uniform velocity rotates, under the effect of electric arc heat, and welding bead both sides metal molten, under capillary effect, both sides metal forms molten bath, last Step crystallization, forms weld seam; After welding one circle, after first place connects, electric current gradual change, to 110A, enters capping operation, and gradual change adopts and slowly increases, and the time is 5s.
6) gradual change is to 110A, starts to send into welding wire, and torch swinging realizes capping shaping simultaneously, and amplitude of fluctuation is 1mm.Welding wire is H08A, and wire feed rate is 65cm/min, sealing wire speed 200mm/min.
7), after cover welding joint is formed, first wire feed stops, and electric current progressively decays to 20A, blow-out.
Although the present invention with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; the Method and Technology content of above-mentioned announcement can be utilized to make possible variation and amendment to technical solution of the present invention; therefore; every content not departing from technical solution of the present invention; the any simple modification done above embodiment according to technical spirit of the present invention, equivalent variations and modification, all belong to the protection domain of technical solution of the present invention.
Claims (9)
1. a circumferential weld structure banjo fixing butt jointing automatic welding method, comprises the steps:
1) treat welder's part and carry out retaining wall on slope;
2) according to product structure requirement, position weldering, fit-up gap is 0 ~ 1.2mm;
3) according to material welding characteristic, be confirmed whether to carry out the pre-heat treatment and preheat temperature, suitable preheat temperature is set, during preheating, take gas shield measure;
4) by preheated workpiece or do not need the workpiece of preheating to be loaded on rotary tooling;
5) adjust welding torch position after assembling, welding gun is positioned at above welding bead and starts bottoming welding;
6), after the source of welding current starting the arc, start bottoming welding, workpiece to be welded at the uniform velocity rotates, under the effect of electric arc heat, and welding bead both sides metal molten, under capillary effect, both sides metal forms molten bath, last Step crystallization, forms weld seam;
7), after bottoming welding, cover welding is carried out.
2. a kind of circumferential weld structure banjo fixing butt jointing automatic welding method according to claim 1, it is characterized in that, in described step 1), groove is single V groove with root face or stairstepping groove; Bottom described single V groove with root face, root face height is 1.5 ~ 2mm, and bevel angle is 20 ° ~ 60 °; Bottom described stairstepping groove, root face height is 0.5 ~ 2.3mm, and monolateral root face width is 2 ~ 5mm, and top bevel angle is 10 ° ~ 60 °.
3. a kind of circumferential weld structure banjo fixing butt jointing automatic welding method according to claim 1, is characterized in that, bottoming in described step 6) welding adopt automatic tungsten anode argon arc welding connect in technique from fusion welding, welding process welding gun is positioned at above workpiece to be welded; After the starting the arc, electric arc stops 1 ~ 2s workpiece to start to rotate, and ensures starting the arc fusion penetration, after bottoming has been welded, enters cover welding operation; Cover welding takes the mode of torch swinging to realize capping shaping, and amplitude of fluctuation is 0.2 ~ 1.2mm.
4. a kind of circumferential weld structure banjo fixing butt jointing automatic welding method according to claim 1, it is characterized in that, when notch cuttype groove, electric current is 40A ~ 150A, sealing wire speed is 150mm/min ~ 250mm/min, and argon flow amount is 7L/min ~ 15L/min.
5. a kind of circumferential weld structure banjo fixing butt jointing automatic welding method according to claim 1, it is characterized in that, when adopting Y type groove, electric current is 150A ~ 220A, sealing wire speed is 150mm/min ~ 250mm/min, argon flow amount is 7L/min ~ 15L/min, back side argon flow amount 4L/min ~ 13L/min.
6. a kind of circumferential weld structure banjo fixing butt jointing automatic welding method according to claim 1, is characterized in that, after bottoming welding, takes in following two kinds of modes that any one enters cover welding operation:
Mode 1: not blow-out after bottoming welding, directly enters cosmetic welding, rotary tooling rotates and does not stop, and electric current gradual change is to cover welding electric current, and wire feeding motor rotates, and starts wire feed, and arc welding gun head swings, and starts welding;
Mode 2: after bottoming welding forms joint, take the mode blow-out of gradual change, readjust welding parameter after blow-out and carry out cover welding.
7. a kind of circumferential weld structure banjo fixing butt jointing automatic welding method according to claim 1, it is characterized in that, the technological parameter of described cover welding is: welding current is 150A ~ 180A, and sealing wire speed is 140mm/min ~ 220mm/min, and argon flow amount is 9L/min ~ 15L/min.
8. a kind of circumferential weld structure banjo fixing butt jointing automatic welding method according to claim 1, is characterized in that, in welding process; two sections of methods of sealing are adopted to realize inner inflatable protection; sealing two ends adopts special plug, and the external air inlet pipe of one end plug, the plug of one end has venthole in addition.
9. a kind of circumferential weld structure banjo fixing butt jointing automatic welding method according to claim 1, is characterized by: described workpiece to be welded is 4 ~ 12mm; Groove is turnery processing, and both sides root face difference in size is not more than 0.2mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310499795.0A CN104551344A (en) | 2013-10-23 | 2013-10-23 | Automatic welding method of loop-weld structured but joints |
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| CN201310499795.0A CN104551344A (en) | 2013-10-23 | 2013-10-23 | Automatic welding method of loop-weld structured but joints |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107717302A (en) * | 2017-11-09 | 2018-02-23 | 天津中车唐车轨道车辆有限公司 | A kind of multi-functional cast welding tool setup |
| CN108161183A (en) * | 2017-11-08 | 2018-06-15 | 上海锅炉厂有限公司 | A kind of container longitudinal joint of 1G downhand positions or circumferential weld composite tungsten electrode inert gas-shielded arc welding welding procedure |
| CN109454333A (en) * | 2018-11-30 | 2019-03-12 | 上海航天精密机械研究所 | Spinning part circumferential weld laser-GMA complex welding method |
| CN109483057A (en) * | 2018-11-30 | 2019-03-19 | 上海航天精密机械研究所 | Circumferential weld laser-MAG compound welding method |
| CN109648205A (en) * | 2018-12-17 | 2019-04-19 | 沧州天瑞星光热技术有限公司 | A kind of high temperature solar energy heat collection pipe general assembly welding method and fixture system |
| CN110293322A (en) * | 2019-07-01 | 2019-10-01 | 武汉金顿激光科技有限公司 | A kind of laser electrical arc complex welding method of martensitic precipitation |
| CN110560947A (en) * | 2019-09-06 | 2019-12-13 | 中国化学工程第六建设有限公司 | high-temperature alloy steel pipe welding method capable of preventing delayed cracks |
| CN110802299A (en) * | 2019-11-14 | 2020-02-18 | 四川航天长征装备制造有限公司 | All-position wire-filling welding method for large-diameter aluminum alloy pipe |
| CN111822824A (en) * | 2020-07-13 | 2020-10-27 | 陈树强 | Circular seam welding process |
| CN112589234A (en) * | 2020-12-01 | 2021-04-02 | 中铁宝桥（扬州）有限公司 | Automatic welding process for diaphragm plate connecting plate |
| WO2021114686A1 (en) * | 2019-12-11 | 2021-06-17 | 中车长江车辆有限公司 | Circular seam welding method for low-alloy steel low temperature pressure vessel tank body |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108161183A (en) * | 2017-11-08 | 2018-06-15 | 上海锅炉厂有限公司 | A kind of container longitudinal joint of 1G downhand positions or circumferential weld composite tungsten electrode inert gas-shielded arc welding welding procedure |
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| CN109454333A (en) * | 2018-11-30 | 2019-03-12 | 上海航天精密机械研究所 | Spinning part circumferential weld laser-GMA complex welding method |
| CN109483057A (en) * | 2018-11-30 | 2019-03-19 | 上海航天精密机械研究所 | Circumferential weld laser-MAG compound welding method |
| CN109648205B (en) * | 2018-12-17 | 2021-06-11 | 沧州天瑞星光热技术有限公司 | Assembly welding method and tool system for medium-high temperature solar heat collecting pipe assembly |
| CN109648205A (en) * | 2018-12-17 | 2019-04-19 | 沧州天瑞星光热技术有限公司 | A kind of high temperature solar energy heat collection pipe general assembly welding method and fixture system |
| CN110293322A (en) * | 2019-07-01 | 2019-10-01 | 武汉金顿激光科技有限公司 | A kind of laser electrical arc complex welding method of martensitic precipitation |
| CN110560947A (en) * | 2019-09-06 | 2019-12-13 | 中国化学工程第六建设有限公司 | high-temperature alloy steel pipe welding method capable of preventing delayed cracks |
| CN110560947B (en) * | 2019-09-06 | 2021-06-15 | 中国化学工程第六建设有限公司 | High-temperature alloy steel pipe welding method capable of preventing delayed cracks |
| CN110802299A (en) * | 2019-11-14 | 2020-02-18 | 四川航天长征装备制造有限公司 | All-position wire-filling welding method for large-diameter aluminum alloy pipe |
| WO2021114686A1 (en) * | 2019-12-11 | 2021-06-17 | 中车长江车辆有限公司 | Circular seam welding method for low-alloy steel low temperature pressure vessel tank body |
| CN111822824A (en) * | 2020-07-13 | 2020-10-27 | 陈树强 | Circular seam welding process |
| CN112589234A (en) * | 2020-12-01 | 2021-04-02 | 中铁宝桥（扬州）有限公司 | Automatic welding process for diaphragm plate connecting plate |
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