CN102922153B - Laser guide GMAW (Gas Metal Arc Welding) electric arc compound transverse welding method - Google Patents
Laser guide GMAW (Gas Metal Arc Welding) electric arc compound transverse welding method Download PDFInfo
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Abstract
The invention provides a laser guide GMAW (Gas Metal Arc Welding) electric arc compound transverse welding method, relates to a transverse welding method and solves the problem of the existing welding method that fused metal flows down when transverse welding is carried out in a vertical plane so as to cause undercut and deviation of a central line of a welding line. The laser guide GMAW electric arc compound transverse welding method is carried out by the following steps of: 1, carrying out oil-removing and oxidization-film-removing treatment on a work piece to be welded; 2, filling a welding wire; and 3, starting a laser device and a GMAW electric arc welding machine. With the adoption of the laser guide GMAW electric arc compound transverse welding method, the flowing of the fused metal can be controlled under the condition with a large welding current, so that the undercut defect of the welding line is eliminated and the central line of the welding line is rightly centered. The laser guide GMAW electric arc compound transverse welding method is applicable to the field of metal transverse welding engineering.
Description
Technical field
The present invention relates to transverse weld method.
Background technology
As everyone knows, compared with welding with traditional level, transverse weld process exists very large difference, when transverse weld, the metal of melting is subject to the effect of self gravitation, in the time that the surface tension of motlten metal is not enough to resist himself Action of Gravity Field, motlten metal will drop down down, thereby forms the defects such as undercut, overlap and axis of a weld depart from.Especially for aluminium alloy, because its surface tension is little, the features such as good fluidity, in its transverse weld process, under motlten metal, dropping down phenomenon will be more serious.
Be mainly to concentrate on traditional arc welding and submerged-arc welding aspect for the research of transverse weld method both at home and abroad at present, the control method adopting is mainly the auxiliary control in pulse current control, magnetic field and rotating the arc control etc.These methods be all by change the flow behavior in molten bath control motlten metal under drop down, but these methods all require heat input to be controlled in less scope, this greatly reduces welding efficiency.
Late 1970s, the laser-arc hybrid welding technology is suggested first, it is that laser and two kinds of thermals source of electric arc are combined and act on same plane the same area, thereby overcome the deficiency of independent role, compare single laser weld or single arc welding, can improve weld penetration and welding adaptability, reduce welding deformation, improve welding efficiency.As everyone knows, mostly the mode that traditional laser-arc hybrid welding in industry adopts is that laser and welding wire act on axis of a weld simultaneously, and laser beam center line and welding wire center line are at same plane, the keyhole that laser weld forms can attract and compress welding arc, change form and the type of flow in molten bath, improve arc welding energy density and welding efficiency.When at present traditional laser-arc hybrid welding in industry method is applied to and carries out level welding in horizontal plane, possess above-mentioned advantage, while carrying out transverse weld in perpendicular, still can't resolve but be applied to the problem that the undercut of dropping down under motlten metal and cause and axis of a weld depart from.
Summary of the invention
The present invention will solve the problem that existing welding method exists when carrying out transverse weld in perpendicular the undercut of dropping down under motlten metal and cause and axis of a weld to depart from, and proposes a kind of electric arc combined transverse weld method of laser aiming GMAW.
A kind of electric arc combined transverse weld method of laser aiming GMAW in the present invention is carried out according to the following steps:
One, treat welder's part and carry out oil removing and oxide film dissolving processing: first use acetone surface of the work wiping to be welded 2 times～3 times with wipe oil, the sodium hydroxide solution that is 6% ~ 10% with mass percent concentration again soaks after 6min ~ 12min aluminium alloy plate, rinse well with clear water, treating welder's part with the salpeter solution that mass percent concentration is 25% ~ 35% again soaks after 2min ~ 4min, rinse well and dry up with clear water, then the surface to be welded of workpiece to be welded is fixed in walking mechanism in the mode of laterally placing;
Two, filler wire: gage of wire is 1.0mm ~ 1.6mm, and dry extension of electrode is controlled at 10mm ~ 30mm, the angle α of welding wire and normal is 30 ° ~ 75 °;
Three, starting laser instrument and GMAW arc welder welds: using pure Ar gas or volume ratio is 95%Ar+5%CO
2mist is protective gas, when welding, gas flow is 15L/min ~ 50L/min, laser instrument acts directly on workpiece to be welded with focus version, be that 0.1mm ~ 0.4mm, laser power scope are that the welding current of 2.0kW ~ 6.0kW, GMAW arc welding is to carry out compound transverse weld under 30A ~ 250A, the speed of welding condition that is 0.5m/min ~ 2.5m/min at the spot diameter of laser beam, obtain weldment; Wherein laser instrument is CO
2gas laser, optical fiber laser, YAG solid state laser or semiconductor laser; Wherein in the time that the welding current of GMAW arc welding is 30A ~ 149A, laser beam center line and welding wire center line are positioned on two normal planes of workpiece to be welded, more than laser beam active position is positioned at axis of a weld, vertical irradiation is on workpiece to be welded, welding wire action of points position is positioned on axis of a weld, between laser beam active position and welding wire action of points position, vertical range h is 2mm ~ 5mm, and between the spot active position of laser beam and welding wire action of points position, horizontal range d is 2mm ~ 5mm; In the time that the welding current of GMAW arc welding is 150A ~ 250A, laser beam center line is positioned on workpiece normal plane to be welded, and above axis of a weld, vertical irradiation is on workpiece to be welded, welding wire is most advanced and sophisticated is angle β with workpiece normal plane to be welded, its size is between 20 ° ~ 45 °, GMAW electric arc tilting action is at welding region, welding wire action of points point is positioned at axis of a weld, between laser beam active position and welding wire action of points position, vertical range h is 2mm ~ 5mm, and between the spot active position of laser beam and welding wire action of points position, horizontal range d is 2mm ~ 5mm.
Operation principle of the present invention is: the electric arc combined transverse weld method of laser aiming GMAW, be exactly in transverse weld process, by laser and electric arc cross action or tilting action at welding region, be that laser and arcing are in Different Plane zones of different, utilize the sucking action of laser to GMAW electric arc, the sucking action of laser plasma to molten drop, and the arc force of electric arc self, change the stressing conditions in molten bath, thereby improve the flow regime in molten bath, reduce the negative effect of motlten metal self gravitation, under inhibition molten bath, drop down.
Compared with traditional transverse weld method, the present invention includes following beneficial effect:
1, increased process parameters range, by regulating laser power, can be suppressed at motlten metal under larger electric current welding parameter under drop down, thereby eliminate the undercut defect of weld seam, and just centering of axis of a weld;
2, improved welding efficiency, the laser action of high power density, in welding region, can increase weld penetration, reduces sweating heat input quantity, improves speed of welding simultaneously;
3, adopt complex welding method, the tissue topography that can improve weld seam, the mechanical property of raising weld seam.
Brief description of the drawings
Fig. 1 is the electric arc combined transverse weld schematic diagram of laser aiming GMAW, wherein the welding current of GMAW arc welding is 30A ~ 149A, 1 is workpiece to be welded, 2 is weld seam, 3 is laser beam, 4 is GMAW welding gun, 5 is welding wire, 6 is the normal plane at GMAW arc welding gun place, more know laser beam center line place normal plane for view and omit, h is vertical range between laser action position and welding wire action of points position, and d is horizontal range between LASER SPECKLE active position and welding wire action of points position, k is dry extension of electrode, and arrow direction is welding direction, Fig. 2 is the electric arc combined transverse weld schematic diagram of laser aiming GMAW, wherein the welding current of GMAW arc welding is 150A ~ 250A, 1 is workpiece to be welded, 2 is weld seam, 3 is laser beam, 4 is GMAW welding gun, 5 is welding wire, 6 is the normal plane perpendicular to surface of the work at axis of a weld place, 7 is the working face at GMAW arc welding gun center line place, h is vertical range between laser action position and welding wire action of points position, d is horizontal range between LASER SPECKLE active position and welding wire action of points position, welding wire is most advanced and sophisticated is angle β with workpiece normal plane to be welded, k is dry extension of electrode, arrow direction is welding direction, Fig. 3 is the face of weld of the electric arc combined transverse weld of laser aiming GMAW in experiment one, Fig. 4 is the section of weld joint of the electric arc combined transverse weld of laser aiming GMAW in experiment one, Fig. 5 is the face of weld of the electric arc combined transverse weld of laser aiming GMAW in experiment two, Fig. 6 is the section of weld joint of the electric arc combined transverse weld of laser aiming GMAW in experiment two, Fig. 7 is the face of weld of the electric arc combined transverse weld of conventional laser-GMAW in experiment three, Fig. 8 is the section of weld joint of the electric arc combined transverse weld of conventional laser-GMAW in experiment three.
Detailed description of the invention
Technical solution of the present invention is not limited to following cited detailed description of the invention, also comprises any combination between each detailed description of the invention.
Detailed description of the invention one: a kind of electric arc combined transverse weld method of the laser aiming GMAW following steps in present embodiment are carried out:
One, treat welder's part and carry out oil removing and oxide film dissolving processing: first use acetone surface of the work wiping to be welded 2 times～3 times with wipe oil, the sodium hydroxide solution that is 6% ~ 10% with mass percent concentration again soaks after 6min ~ 12min aluminium alloy plate, rinse well with clear water, treating welder's part with the salpeter solution that mass percent concentration is 25% ~ 35% again soaks after 2min ~ 4min, rinse well and dry up with clear water, then the surface to be welded of workpiece to be welded is fixed in walking mechanism in the mode of laterally placing;
Two, filler wire: gage of wire is 1.0mm ~ 1.6mm, and dry extension of electrode is controlled at 10mm ~ 30mm, the angle α of welding wire and normal is 30 ° ~ 75 °;
Three, starting laser instrument and GMAW arc welder welds: using pure Ar gas or volume ratio is 95%Ar+5%CO
2mist is protective gas, when welding, gas flow is 15L/min ~ 50L/min, laser instrument acts directly on workpiece to be welded with focus version, be that 0.1mm ~ 0.4mm, laser power scope are that the welding current of 2.0kW ~ 6.0kW, GMAW arc welding is to carry out compound transverse weld under 30A ~ 250A, the speed of welding condition that is 0.5m/min ~ 2.5m/min at the spot diameter of laser beam, obtain weldment; Wherein laser instrument is CO
2gas laser, optical fiber laser, YAG solid state laser or semiconductor laser; Wherein in the time that the welding current of GMAW arc welding is 30A ~ 149A, laser beam center line and welding wire center line are positioned on two normal planes of workpiece to be welded, more than laser beam active position is positioned at axis of a weld, vertical irradiation is on workpiece to be welded, welding wire action of points position is positioned on axis of a weld, between laser beam active position and welding wire action of points position, vertical range h is 2mm ~ 5mm, and between the spot active position of laser beam and welding wire action of points position, horizontal range d is 2mm ~ 5mm; In the time that the welding current of GMAW arc welding is 150A ~ 250A, laser beam center line is positioned on workpiece normal plane to be welded, and above axis of a weld, vertical irradiation is on workpiece to be welded, welding wire is most advanced and sophisticated is angle β with workpiece normal plane to be welded, its size is between 20 ° ~ 45 °, GMAW electric arc tilting action is at welding region, welding wire action of points point is positioned at axis of a weld, between laser beam active position and welding wire action of points position, vertical range h is 2mm ~ 5mm, and between the spot active position of laser beam and welding wire action of points position, horizontal range d is 2mm ~ 5mm.
Compared with traditional transverse weld method, the present invention includes following beneficial effect:
1, increased process parameters range, by regulating laser power, can be suppressed at motlten metal under larger electric current welding parameter under drop down, thereby eliminate the undercut defect of weld seam;
2, improved welding efficiency, the laser action of high power density, in welding region, can increase weld penetration, reduces sweating heat input quantity, improves speed of welding simultaneously;
3, adopt complex welding method, the tissue topography that can improve weld seam, the mechanical property of raising weld seam.
Detailed description of the invention two: what present embodiment was different from detailed description of the invention one is in step 1, first use acetone surface of the work wiping to be welded 2 times with wipe oil, the sodium hydroxide solution that is 8% with mass percent concentration again soaks after 9min aluminium alloy plate, rinse well with clear water, then treat welder's part with the salpeter solution that mass percent concentration is 30% and soak 3min.Other step and parameter are identical with detailed description of the invention one.
Detailed description of the invention three: what present embodiment was different from detailed description of the invention one or two is that in step 2, gage of wire is 1.2mm ~ 1.4mm, and dry extension of electrode is controlled at 12mm ~ 25mm, the angle α of welding wire and normal is 40 ° ~ 65 °.Other step and parameter are identical with detailed description of the invention one or two.
Detailed description of the invention four: what present embodiment was different from detailed description of the invention one or two is that in step 2, gage of wire is 1.3mm, and dry extension of electrode is controlled at 15mm, the angle α of welding wire and normal is 60 °.Other step and parameter are identical with detailed description of the invention one or two.
Detailed description of the invention five: the spot diameter of what present embodiment was different from one of detailed description of the invention one to four is laser beam in step 3 is 0.2mm ~ 0.3mm, and laser power scope is 3.0kW ~ 5.0kW.Other step and parameter are identical with one of detailed description of the invention one to four.
Detailed description of the invention six: the spot diameter of what present embodiment was different from one of detailed description of the invention one to four is laser beam in step 3 is 0.2mm, and laser power scope is 4.0kW.Other step and parameter are identical with one of detailed description of the invention one to four.
Detailed description of the invention seven: the welding current of GMAW arc welding in step 3 that what present embodiment was different from one of detailed description of the invention one to six is is 40A ~ 200A, and speed of welding is 1m/min ~ 2m/min.Other step and parameter are identical with one of detailed description of the invention one to six.
Detailed description of the invention eight: the welding current of GMAW arc welding in step 3 that what present embodiment was different from one of detailed description of the invention one to six is is 120A, and speed of welding is 1m/min.Other step and parameter are identical with one of detailed description of the invention one to six.
Detailed description of the invention nine: what present embodiment was different from one of detailed description of the invention one to eight is when the welding current when GMAW arc welding is 40A ~ 140A in step 3, between laser beam active position and welding wire action of points position, vertical range h is 3mm ~ 4mm, and between the spot active position of laser beam and welding wire action of points position, horizontal range d is 3mm ~ 4mm.Other step and parameter are identical with one of detailed description of the invention one to eight.
Detailed description of the invention ten: what present embodiment was different from one of detailed description of the invention one to eight is when the welding current when GMAW arc welding is 120A in step 3, between laser beam active position and welding wire action of points position, vertical range h is 3mm, and between the spot active position of laser beam and welding wire action of points position, horizontal range d is 3mm.Other step and parameter are identical with one of detailed description of the invention one to eight.
In order to verify beneficial effect of the present invention, carry out following experiment:
Experiment one: a kind of electric arc combined transverse weld method of laser aiming GMAW is carried out according to the following steps:
One, treat welder's part and carry out oil removing and oxide film dissolving processing: the 2219 aluminium alloy plates surface wiping that is first 8mm with acetone at thickness 2 times is with wipe oil, the sodium hydroxide solution that is 8% with mass percent concentration again soaks after 9min aluminium alloy plate, rinse well with clear water, treating welder's part with the salpeter solution that mass percent concentration is 30% again soaks after 3min, rinse well and dry up with clear water, then the surface to be welded of aluminium alloy plate is fixed in walking mechanism in the mode of laterally placing;
Two, filler wire: gage of wire is 1.0mm, dry extension of electrode k is 15mm, the angle α of welding wire and normal is 60 °;
Three, starting laser instrument and GMAW arc welder welds: CO
2gas laser acts directly on workpiece to be welded with focus version, spot diameter is 0.2mm, laser power scope is 3.5kW, the welding current of GMAW arc welding is 120A, speed of welding is 1m/min, when welding, laser instrument is front, GMAW arc welding is rear, when compound transverse weld, using pure Ar gas is protective gas, when welding, flow is 25L/min, laser beam center line and welding wire center line are positioned on two normal planes of aluminum alloy plate materials, more than laser action position is positioned at axis of a weld, vertical irradiation is on aluminum alloy plate materials, welding wire action of points position is positioned on axis of a weld, between laser action position and welding wire action of points position, vertical range h is 3mm, between LASER SPECKLE active position and welding wire action of points position, horizontal range d is 3mm, see Fig. 1,
Experiment two: a kind of electric arc combined transverse weld method of laser aiming GMAW is carried out according to the following steps:
One, treat welder's part and carry out oil removing and oxide film dissolving processing: the 2219 aluminium alloy plates surface wiping that is first 8mm with acetone at thickness 2 times is with wipe oil, the sodium hydroxide solution that is 8% with mass percent concentration again soaks after 9min aluminium alloy plate, rinse well with clear water, treating welder's part with the salpeter solution that mass percent concentration is 30% again soaks after 3min, rinse well and dry up with clear water, then the surface to be welded of aluminium alloy plate is fixed in walking mechanism in the mode of laterally placing;
Two, filler wire: gage of wire is 1.0mm, dry extension of electrode k is 15mm, the angle α of welding wire and normal is 60 °;
Three, starting laser instrument and GMAW arc welder welds: optical fiber laser acts directly on workpiece to be welded with focus version, spot diameter is 0.2mm, laser power scope is 3.5kW, the welding current of GMAW arc welding is 160A, speed of welding is 1m/min, when welding, laser instrument is front, GMAW arc welding is rear, when compound transverse weld, using pure Ar gas is protective gas, when welding, flow is 25L/min, laser beam center line is positioned on workpiece normal plane to be welded, and above axis of a weld, vertical irradiation is on aluminum alloy plate materials, welding wire is most advanced and sophisticated is angle β with workpiece normal plane to be welded, its size is 30 °, laser beam center line and welding wire center line are positioned on two normal planes of aluminum alloy plate materials, more than laser action position is positioned at axis of a weld, vertical irradiation is on mother metal, welding wire action of points position is positioned on axis of a weld, between laser action position and welding wire action of points position, vertical range h is 3mm, between LASER SPECKLE active position and welding wire action of points position, horizontal range d is 3mm, see Fig. 2,
Experiment three: the electric arc combined transverse weld method of conventional laser-GMAW is carried out according to the following steps:
One, treat welder's part and carry out oil removing and oxide film dissolving processing: the 2219 aluminium alloy plates surface wiping that is first 8mm with acetone at thickness 2 times is with wipe oil, the sodium hydroxide solution that is 8% with mass percent concentration again soaks after 9min aluminium alloy plate, rinse well with clear water, treating welder's part with the salpeter solution that mass percent concentration is 30% again soaks after 3min, rinse well and dry up with clear water, then the surface to be welded of aluminium alloy plate is fixed in walking mechanism in the mode of laterally placing;
Two, filler wire: gage of wire is 1.0mm, dry extension of electrode k is 15mm, the angle α of welding wire and normal is 60 °;
Three, starting laser instrument and GMAW arc welder welds: CO
2gas laser acts directly on workpiece to be welded with focus version, spot diameter is 0.2mm, laser power scope is 3.5kW, the welding current of GMAW arc welding is 120A, speed of welding is 1m/min, when welding, laser instrument is front, GMAW arc welding is rear, when compound transverse weld, using pure Ar gas is protective gas, when welding, flow is 25L/min, laser beam center line and welding wire center line are positioned on the same normal plane of aluminum alloy plate materials, laser action position is positioned on axis of a weld, vertical irradiation is on aluminum alloy plate materials, welding wire action of points position is positioned on axis of a weld, between laser action position and welding wire action of points position, vertical range h is 0mm, between LASER SPECKLE active position and welding wire action of points position, horizontal range d is 3mm,
Fig. 3 is the face of weld of the electric arc combined transverse weld of laser aiming GMAW in experiment one; Fig. 4 is the section of weld joint of the electric arc combined transverse weld of laser aiming GMAW in experiment one; Fig. 5 is the face of weld of the electric arc combined transverse weld of laser aiming GMAW in experiment two; Fig. 6 is the section of weld joint of the electric arc combined transverse weld of laser aiming GMAW in experiment two, can be found out by Fig. 3 to Fig. 6, adopt the electric arc combined transverse weld method of laser aiming GMAW, can under larger welding current condition, control motlten metal under drop down, thereby eliminate the undercut defect of weld seam, and just centering of axis of a weld.Fig. 7 is the face of weld of the electric arc combined transverse weld of conventional laser-GMAW in experiment three; Fig. 8 is the section of weld joint of the electric arc combined transverse weld of conventional laser-GMAW in experiment three, can be found out by Fig. 7 and Fig. 8, and the serious defect that stays appears in weld seam, has had a strong impact on the serviceability of weld seam.
Claims (10)
1. the electric arc combined transverse weld method of laser aiming GMAW, is characterized in that it realizes by following steps:
One, aluminium alloy plate is carried out to oil removing and oxide film dissolving processing: first use acetone aluminium alloy plate surface wiping 2 times～3 times with wipe oil, the sodium hydroxide solution that is 6%～10% with mass percent concentration again soaks after 6min～12min aluminium alloy plate, rinse well with clear water, the salpeter solution that is 25%～35% with mass percent concentration again soaks after 2min～4min aluminium alloy plate, rinse well and dry up with clear water, then the surface to be welded of aluminium alloy plate is fixed in walking mechanism in the mode of laterally placing;
Two, filler wire: gage of wire is 1.0mm～1.6mm, and dry extension of electrode is controlled at 10mm～30mm, the angle α of the normal of welding wire and aluminium alloy plate workpiece to be welded is 30 °～75 °;
Three, starting laser instrument and GMAW arc welder welds: using pure Ar gas or volume ratio is 95%Ar+5%CO
2mist is protective gas, when welding, gas flow is 15L/min～50L/min, laser instrument acts directly on aluminium alloy plate with focus version, be that 0.1mm～0.4mm, laser power scope are that the welding current of 2.0kW～6.0kW, GMAW arc welding is to carry out compound transverse weld under 30A～149A and 150A～250A, the speed of welding condition that is 0.5m/min～2.5m/min at the spot diameter of laser beam, obtain weldment, wherein laser instrument is CO
2gas laser, optical fiber laser, YAG solid state laser or semiconductor laser, wherein in the time that the welding current of GMAW arc welding is 30A～149A, laser beam center line and welding wire center line are positioned on two normal planes of aluminium alloy plate, more than laser beam active position is positioned at axis of a weld, vertical irradiation is on workpiece to be welded, welding wire action of points position is positioned on axis of a weld, between laser beam active position and welding wire action of points position, vertical range h is 2mm～5mm, and between the spot active position of laser beam and welding wire action of points position, horizontal range d is 2mm～5mm, in the time that the welding current of GMAW arc welding is 150A～250A, laser beam center line is positioned on aluminium alloy plate normal plane, and above axis of a weld, vertical irradiation is on aluminium alloy plate, welding wire center line and aluminium alloy plate normal plane are angle β, its size is between 20 °～45 °, GMAW electric arc tilting action is at welding region, welding wire action of points point is positioned at axis of a weld, between laser beam active position and welding wire action of points position, vertical range h is 2mm～5mm, between the spot active position of laser beam and welding wire action of points position, horizontal range d is 2mm～5mm.
2. the electric arc combined transverse weld method of a kind of laser aiming GMAW as claimed in claim 1, it is characterized in that first using in step 1 acetone surface of the work wiping to be welded 2 times with wipe oil, the caustic lye of soda that is 8% with mass percent concentration again soaks after 9min aluminium alloy plate, rinse well with clear water, the more molten welder's of the treating part of the nitric acid that is 30% with mass percent concentration soaks 3min.
3. the electric arc combined transverse weld method of a kind of laser aiming GMAW as claimed in claim 1, is characterized in that in step 2, gage of wire is 1.2mm～1.4mm, and dry extension of electrode is controlled at 12mm～25mm, and the angle α of welding wire and normal is 40 °～65 °.
4. the electric arc combined transverse weld method of a kind of laser aiming GMAW as claimed in claim 1, is characterized in that in step 2, gage of wire is 1.3mm, and dry extension of electrode is controlled at 15mm, and the angle α of welding wire and normal is 60 °.
5. a kind of electric arc combined transverse weld method of laser aiming GMAW as described in any one in claim 1 to 4, the spot diameter that it is characterized in that laser beam in step 3 is 0.2mm～0.3mm, laser power scope is 3.0kW～5.0kW.
6. a kind of electric arc combined transverse weld method of laser aiming GMAW as described in any one in claim 1 to 4, the spot diameter that it is characterized in that laser beam in step 3 is 0.2mm, laser power scope is 4.0kW.
7. the electric arc combined transverse weld method of a kind of laser aiming GMAW as claimed in claim 5, the welding current that it is characterized in that GMAW arc welding in step 3 is 40A～200A, speed of welding is 1m/min～2m/min.
8. the electric arc combined transverse weld method of a kind of laser aiming GMAW as claimed in claim 5, the welding current that it is characterized in that GMAW arc welding in step 3 is 120A, speed of welding is 1m/min.
9. the electric arc combined transverse weld method of a kind of laser aiming GMAW as claimed in claim 7, while it is characterized in that in step 3, the welding current when GMAW arc welding is 40A～140A, between laser beam active position and welding wire action of points position, vertical range h is 3mm～4mm, and between the spot active position of laser beam and welding wire action of points position, horizontal range d is 3mm～4mm.
10. the electric arc combined transverse weld method of a kind of laser aiming GMAW as claimed in claim 7, while it is characterized in that in step 3, the welding current when GMAW arc welding is 120A, between laser beam active position and welding wire action of points position, vertical range h is 3mm, and between the spot active position of laser beam and welding wire action of points position, horizontal range d is 3mm.
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