CN106181043B - A kind of welding method for improving hybrid Laser-Arc Welding process stability - Google Patents
A kind of welding method for improving hybrid Laser-Arc Welding process stability Download PDFInfo
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- CN106181043B CN106181043B CN201610842690.4A CN201610842690A CN106181043B CN 106181043 B CN106181043 B CN 106181043B CN 201610842690 A CN201610842690 A CN 201610842690A CN 106181043 B CN106181043 B CN 106181043B
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
- B23K26/348—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma welding
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/60—Preliminary treatment
Abstract
A kind of welding method for improving hybrid Laser-Arc Welding process stability; it is related to materials processing engineering field; the present invention carries out low-temperature treatment to protective gas; and single paraxonic protection gas is added in arc welding gun side; its axis direction points to laser action point and its top; produced when welding at photo plasma, realize the stability for improving the welding process.The method welding efficiency of the present invention is high, suppresses stomata and fire check, improves mechanical property, improves long weld seam welding stability.
Description
Technical field
The present invention relates to materials processing engineering field, and in particular to one kind improves laser-arc hybrid welding in industry process stabilization
The welding method of property.
Background technology
Laser-arc hybrid welding in industry is in the phase at the end of the seventies in last century, proposes to go forward side by side at first by British scholar W.M.Steen
Row experiment.Two kinds of thermals source of laser and electric arc are combined by it, overcome the shortcomings of single heat source, are utilized so as to obtain energization
Rate, the effect for improving welding process stability.Using the laser-arc hybrid welding, have that speed of welding is fast, weld penetration
Greatly, the advantages that heat input is low, deformation is small, so as to reach low cost, high efficiency, the effect of high-adaptability.It is especially suitable for cut deal
Welding.
Following some problems when at present, using laser-arc hybrid welding in industry be present：
(1) there is " finite energy enhancing " phenomenon in laser-arc hybrid welding in industry, i.e., in the presence of a matching range, works as laser
During with electric arc combined welding, only in certain current range, laser has the effect of enhancing with electric arc interaction, otherwise,
Composite welding effect is even worse than single laser welding；
(2) when using laser-arc hybrid welding in industry, during welding electric arc combined in particular by laser-GMA, to compound
Weld penetration of welding requires larger, and the demand of laser power is higher, increases the cost of laser, and work as laser power very
When big, the reaction force of laser plasma can seriously hinder GMA Welding Molten Drop transition, cause the GMA droplet transfers difficult, molten drop
Transition is unstable；
(3) when carrying out bottoming welding using laser-arc hybrid welding in industry, because electric arc is attracted by groove side wall, two are caused
The fusing of side large area, the defects of stomata, incomplete fusion may be caused in follow-up welding process；
(4) because laser power is larger, in the increase of welding process plasma cumulative effect, easily cause laser effective
Power is reduced, and is reduced rapidly in weld seam rear back reinforcement and even lack of penetration phenomenon occurs；
(5) in thick plates, due to action of plasma, plasma has certain loss to laser energy, therefore, swashs
Photocoagulation energy input is larger, causes welding stress and welding deformation amount larger, and heat affected area crystal grain is easily grown up and embrittlement.
From the above, it can be seen that during laser-arc hybrid welding in industry, laser plasma is to influence Combined Welding to take over
The key factor of journey stability and its welding effect.
At present, on suppressing laser plasma during composite welding, the method for improving welding process stability has more
Change protection gas species, adjustment welding parameter and applied mechanical power, magnetic field etc..As patent CN201310039463.4 proposes one kind
Laser-TIG electric arc paraxonic the complex welding methods and device in external high-frequency magnetic field, patent CN201320057081.X propose one
A kind of laser-TIG electric arc coaxial hybrid welding connection devices in external high-frequency magnetic field of kind, patent CN201320198864.X propose one
The laser fusion pole electrical arc paraxonic composite welding apparatus in kind external high-frequency magnetic field, but be above that electric arc is improved, to carry
High composite welding effect, the braking measure to laser are less.
Based on this, the present invention proposes a kind of new side for suppressing laser plasma and improving composite welding process stability
A kind of method --- welding method for improving laser-arc hybrid welding in industry process stability.
The content of the invention
It is contemplated that for problem present in Laser-MIG Composite Welding, and a kind of cryogenic gas protection is provided and swashed
Optical-electronic arc complex welding method.
The present invention is improved tool on the basis of conventional laser-electric arc combined welding to welding protection pneumatic transmission device of air
Body implementation includes：
(1) common plastics pipeline of supplying gas is changed to the cryogenic gas feed-line of adiabatic heat-insulation, directly using adiabatic gas
Cryogenic gas in bottle.
(2) or using other devices to gas cooled down such as using refrigeration machine/air-cooler to protection gas cylinder and appendix
Line is cooled down, and protection temperature degree can be made to be reduced to subzero 50 degree or so by room temperature；Use the cooling bath (temperature that can be provided
It is generally in the range of 13 to -196 DEG C) protection gas cylinder is cooled down, reach lower temperature.
(3) single paraxonic protection gas is added in arc welding gun side, its axis direction points to laser action point and thereon
Side, that is, produced when welding at photo plasma, as shown in Figure 1.
A kind of welding method of raising laser-arc hybrid welding in industry process stability of the present invention, it is according to following step
Suddenly carry out：
Step 1：Before welding, the position to be welded of workpiece to be welded is processed into double V-groove, U-shaped groove or Y type grooves, and
Groove after processing and both side surface are polished and cleaned, the workpiece to be welded after polishing or cleaning is fixed on welding tooling
On fixture；
Step 2：Laser head and arc welding gun and paraxonic protection gas jets are rigidly fixed using fixture；
Step 3：Welding condition is set:
Backing welding：Defocusing amount is ﹣ 3~﹢ 3mm, and laser power is 3000~8000W, and arc current is 100~200A, is swashed
Photoelectric arc spacing is 3~5mm, and speed of welding is 0.6~2m/min；Welding gun protection gas uses pure Ar gas or CO2With Ar gaseous mixtures,
Protection air-flow amount is 20~40L/min, and protection temperature degree is -30 DEG C~-160 DEG C, and paraxonic protection gas uses Ar gas, flow 15
~30L/min, temperature are -50 DEG C~-160 DEG C；
Filling weldering：Defocusing amount is ﹣ 3~﹢ 3mm, and laser power is 400~800W, and arc current is 200~400A, laser
Electric arc spacing is 2~5mm, and speed of welding is 50~600mm/min, and welding gun protection gas uses Ar gas, and flow is 10~20L/
Min, protection temperature degree are -30 DEG C~-160 DEG C；Paraxonic protection gas uses Ar gas, and flow is 15~30L/min, and temperature is -50
DEG C~-160 DEG C；
Step 4：During actual welding, using robot integrated system control welding condition, electric arc first rises
Arc, then after 1~2s of arc stability, laser control sends laser, and last control machine people causes laser work head and welding gun
Associated movement completes welding process.
The present invention mainly has some following advantage compared to traditional laser-electric arc welding：
1st, welding efficiency improves, and due to protecting the strong cooling effect of gas, electric arc substantially shrinks, current density improves, fusion penetration
Increase and molten wide reduction, can be welded using smaller groove, especially when cut deal welds, further compression arc, reduced
Side wall melts.Meanwhile arc welding gun is cooled down, reduce tungsten electrode scaling loss/avoid welding gun from overheating, can continuously the long period enter
The big normative operation of row；
2nd, suppress stomata and fire check, because molten bath cooling velocity improves, be advantageous to suppress conventional laser-electric arc combined weldering
When the metallurgy type stomata that is also easy to produce of fusion line position and Weld pipe mill fire check, reduce weld defect；
3rd, mechanical property is improved, under larger cooling velocity, weld grain refinement, column crystal direction is varied from, together
When reduced due to thermal weld stress, welding joint softened phenomenon makes moderate progress, and improves the comprehensive mechanical property of welding point.
4th, long weld seam welding stability is improved, because paraxonic protection gas can effectively suppress laser plasma, ensures entering
Weld seam monolithic molding is good when the long weld seam of row welds.
Brief description of the drawings
The paraxonic that Fig. 1 is the present invention protects gas schematic diagram；
Fig. 2 is macroscopical metallograph that embodiment 2 welds 20mm thickness mild steel；
Fig. 3 is macroscopical metallograph that embodiment 1 welds 20mm thickness mild steel；
Fig. 4 is the welding heat affected zone figure that embodiment 2 welds 20mm thickness mild steel；
Fig. 5 is the welding heat affected zone figure that embodiment 1 welds 20mm thickness mild steel；
Fig. 6 is back of weld shape appearance figure when embodiment 2 carries out bottoming welding；
Fig. 7 is back of weld shape appearance figure when embodiment 1 carries out bottoming welding；
Fig. 8 is macroscopical metallograph that embodiment 3 welds 6.6mm thickness high-strength steel.
Embodiment
Embodiment one：A kind of welding of raising laser-arc hybrid welding in industry process stability of present embodiment
Method, it is followed the steps below：
Step 1：Before welding, the position to be welded of workpiece to be welded is processed into double V-groove, U-shaped groove or Y type grooves, and
Groove after processing and both side surface are polished and cleaned, the workpiece to be welded after polishing or cleaning is fixed on welding tooling
On fixture；
Step 2：Laser head and arc welding gun and paraxonic protection gas jets are rigidly fixed using fixture；
Step 3：Welding condition is set:
Backing welding：Defocusing amount is ﹣ 3~﹢ 3mm, and laser power is 3000~8000W, and arc current is 100~200A, is swashed
Photoelectric arc spacing is 3~5mm, and speed of welding is 0.3~3m/min；Welding gun protection gas uses pure Ar gas or CO2 and Ar gaseous mixtures,
Protection air-flow amount is 20~40L/min, and protection temperature degree is -30 DEG C~-160 DEG C, and paraxonic protection gas uses Ar gas, flow 15
~30L/min, temperature are -50 DEG C~-160 DEG C；
Filling weldering：Defocusing amount is ﹣ 3~﹢ 3mm, and laser power is 400~800W, and arc current is 200~400A, laser
Electric arc spacing is 2~5mm, and speed of welding is 50~800mm/min, and welding gun protection gas uses Ar gas, and flow is 10~20L/
Min, protection temperature degree are -30 DEG C~-160 DEG C；Paraxonic protection gas uses Ar gas, and flow is 15~30L/min, and temperature is -50
DEG C~-160；
Step 4：During actual welding, using robot integrated system control welding condition, electric arc first rises
Arc, then after 1~2s of arc stability, laser control sends laser, and last control machine people causes laser work head and welding gun
Associated movement completes welding process.
Present embodiment is during backing welding and filling weldering, and if necessary to wire feed, then wire feed rate is 2~6m/
min。
For present embodiment in the laser-MAG compound welding of additional paraxonic protection gas, laser can use CO2Gas
Laser, YAG solid state lasers, semiconductor laser, wherein with optimal using the YAG solid state lasers of optical fiber transmission, because
It is more efficiently and environmentally friendly；Welding machine can use model MV4000 Fu Nisi tig arc welding machines, maximum weld electric current 400A；Fu Ni
This company's T PS4000 MIG/MAG welding machines, current regulation scope are 3-400A, voltage regulation limits 14.2-34V；According to need
Ask and pulse welding can be achieved.Other equipment includes, 1 KUKA robot, in welding process the adjustment of technological parameter pass through
KUKA robotic programmings are realized；1 good fortune Nice wire-feed motor, to ensure that welding wire is accurately sent into.
Embodiment two：Present embodiment is unlike embodiment one：Workpiece to be welded is steel, aluminium or titanium
Alloy.It is other identical with embodiment one.
Embodiment three：Present embodiment is unlike embodiment one：Welding gun is protected during backing welding
Shield gas uses CO2It is to be mixed by any ratio with Ar gaseous mixtures.It is other identical with embodiment one.
Embodiment four：Present embodiment is unlike embodiment one：Welding gun is protected during backing welding
Shield gas uses CO2With Ar gaseous mixtures, the temperature for protecting gas is 0 DEG C~-40 DEG C.It is other identical with embodiment one.
Embodiment five：Present embodiment is unlike embodiment one：Welding gun is protected during backing welding
Shield gas uses CO2With Ar gaseous mixtures, the temperature for protecting gas is 0 DEG C~-30 DEG C.It is other identical with embodiment one.
Embodiment six：Present embodiment is unlike embodiment one：Welding gun is protected during backing welding
Shield gas uses CO2With Ar gaseous mixtures, the temperature for protecting gas is 0 DEG C~-20 DEG C.It is other identical with embodiment one.
Embodiment seven：Present embodiment is unlike embodiment one：Welding gun is protected during backing welding
Shield gas uses CO2With Ar gaseous mixtures, the temperature for protecting gas is 0 DEG C~-10 DEG C.It is other identical with embodiment one.
Embodiment eight：Present embodiment is unlike embodiment one：Welding gun is protected during backing welding
It is -50 DEG C~-160 DEG C to protect temperature degree.It is other identical with embodiment one.
Embodiment nine：Present embodiment is unlike embodiment one：Welding gun is protected during backing welding
It is -50 DEG C~-120 DEG C to protect temperature degree.It is other identical with embodiment one.
Embodiment ten：Present embodiment is unlike embodiment one：Welding gun is protected during backing welding
It is -50 DEG C~-100 DEG C to protect temperature degree.It is other identical with embodiment one.
Embodiment 11：Present embodiment is unlike embodiment one：Welding gun during backing welding
It is -50 DEG C~-80 DEG C to protect temperature degree.It is other identical with embodiment one.
Embodiment 12：Present embodiment is unlike embodiment one：Welding gun during backing welding
It is -50 DEG C~-70 DEG C to protect temperature degree.It is other identical with embodiment one.
Embodiment 13：Present embodiment is unlike embodiment one：Paraxonic during backing welding
It is -80 DEG C~-120 DEG C to protect temperature degree.It is other identical with embodiment one.
Embodiment 14：Present embodiment is unlike embodiment one：Paraxonic during backing welding
It is -80 DEG C~-160 DEG C to protect temperature degree.It is other identical with embodiment one.
Embodiment 15：Present embodiment is unlike embodiment one：Paraxonic during backing welding
It is -80 DEG C~-120 DEG C to protect temperature degree.It is other identical with embodiment one.
Embodiment 16：Present embodiment is unlike embodiment one：Paraxonic during backing welding
It is -80 DEG C~-100 DEG C to protect temperature degree.It is other identical with embodiment one.
Embodiment 17：Present embodiment is unlike embodiment one：Welding gun during filling weldering
It is -50 DEG C~-160 DEG C to protect temperature degree.It is other identical with embodiment one.
Embodiment 18：Present embodiment is unlike embodiment one：Welding gun during filling weldering
It is -50 DEG C~-140 DEG C to protect temperature degree.It is other identical with embodiment one.
Embodiment 19：Present embodiment is unlike embodiment one：Welding gun during filling weldering
It is -50 DEG C~-120 DEG C to protect temperature degree.It is other identical with embodiment one.
Embodiment 20：Present embodiment is unlike embodiment one：Welding gun during filling weldering
It is -50 DEG C~-100 DEG C to protect temperature degree.It is other identical with embodiment one.
Embodiment 21：Present embodiment is unlike embodiment one：Welded during filling weldering
Rifle protection temperature degree is -50 DEG C~-80 DEG C.It is other identical with embodiment one.
Embodiment 22：Present embodiment is unlike embodiment one：It is other during filling weldering
Axle protection temperature degree is -80 DEG C~-160 DEG C.It is other identical with embodiment one.
Embodiment 23：Present embodiment is unlike embodiment one：It is other during filling weldering
Axle protection temperature degree is -80 DEG C~-140 DEG C.It is other identical with embodiment one.
Embodiment 24：Present embodiment is unlike embodiment one：It is other during filling weldering
Axle protection temperature degree is -80 DEG C~-120 DEG C.It is other identical with embodiment one.
Embodiment 25：Present embodiment is unlike embodiment one：It is other during filling weldering
Axle protection temperature degree is -80 DEG C~-100 DEG C.It is other identical with embodiment one.
Present invention is not limited only to the content of the respective embodiments described above, the group of one of them or several embodiments
Contract sample can also realize the purpose of invention.
Beneficial effects of the present invention are verified by above example：
The method and conventional laser-MIG complex welding methods for being utilized respectively the present invention carry out 20mm thickness mild steel butt welding
The backing welding of seam.Specific experiment method is as follows：
Embodiment 1
The backing welding of 20mm thickness mild steel butt welds is carried out using the inventive method, detailed process is as follows：
Step 1:Before welding, according to thickness of slab, the position to be welded of workpiece to be welded is processed into Y type grooves, root face height is
10mm, bevel angle is 20 DEG C, and the groove after processing and both side surface are polished or cleaned, after polishing or cleaning
Workpiece to be welded is fixed on welding tool setup；
Step 2:Laser head and MIG welding guns (paraxonic protection gas jets) are rigidly fixed using special fixture；
Step 3:Welding condition is set：
Defocusing amount is -2mm, laser power 6500W, arc current 140A, laser-arc spacing 3mm, speed of welding 1.2m/
min.Welding gun protection gas use Ar gas, and flow is in 25L/min, -60 DEG C, and paraxonic protects gas to use Ar gas, flow in 25L/min,
Temperature setting is -83 DEG C.
Step 4:During actual welding, using robot integrated system control welding condition, the electricity of MIG first
The arc starting the arc, then 1~2s of arc stability, then laser control send laser, last control machine people causes laser work head
Welding process is completed with MIG welding guns associated movement.
Embodiment 2
The backing welding of 20mm thickness mild steel butt welds is carried out using conventional method, detailed process is as follows：
Step 1:Before welding, according to thickness of slab, the position to be welded of workpiece to be welded is processed into U-shaped groove, root face height is
10mm, bevel angle is 20 DEG C, and the groove after processing and both side surface are polished or cleaned, after polishing or cleaning
Workpiece to be welded is fixed on welding tool setup；
Step 2:Laser head and MIG welding guns are rigidly fixed using special fixture；
Step 3:Welding condition is set：
Defocusing amount is -2mm, laser power 6500W, arc current 140A, laser-arc spacing 3mm, speed of welding 1.2m/
min；Welding gun protection gas uses Ar gas, and flow is in 30L/min, room temperature (20 DEG C)；
Step 4:During actual welding, using robot integrated system control welding condition, the electricity of MIG first
The arc starting the arc, then 1~2s of arc stability, then laser control send laser, last control machine people causes laser work head
Welding process is completed with MIG welding guns associated movement.
Fig. 2 to Fig. 5 is respectively weld seam when backing welding is carried out using conventional laser-MIG composite weldings and the inventive method
Cross Section Morphology, it can be seen that when carrying out backing welding using this method, can once penetrate 10mm root face, and welding process is steady
Fixed, droplet transfer behavior is good, uniformity, and side wall fusing amount is reduced, without obvious bad defect.Arc region and hot shadow simultaneously
Ring area's scope to reduce, as shown in Figure 4 and Figure 5.
Fig. 6 and Fig. 7 is respectively weldering when bottoming welding is carried out using conventional laser-MIG composite weldings and the inventive method
Stitch back side pattern, it can be seen that because laser plasma increases rapidly when conventional method is welded, cause weld seam rear portion not melted
Thoroughly, similar power when using this method, welding process is stable, and back side penetration is uniform, energy attenuation unobvious.
Embodiment 3
6.6mm thickness high-strength steel butt welds are carried out using the inventive method, detailed process is as follows：
Step 1:Before welding, according to thickness of slab, the position to be welded of workpiece to be welded is processed into Y type grooves, root face height is
3mm, bevel angle is 45 DEG C, and the groove after processing and both side surface are polished or cleaned, after polishing or cleaning
Workpiece to be welded is fixed on welding tool setup；
Step 2:Laser head and TIG welding guns (paraxonic protection gas jets) are rigidly fixed using special fixture；
Step 3:Welding condition is set:
Defocusing amount is -2mm, laser power 3400W, arc current 140A, laser-arc spacing 3mm, speed of welding
800mm/min.Welding gun protection gas use Ar gas, and flow is in 25L/min, and -60 DEG C, paraxonic protects gas to use Ar gas, and flow exists
25L/min, temperature setting are -83 DEG C, wire feed rate 2.5m/min.
Filling weldering：Defocusing amount is ﹢ 2mm, laser power 800W, arc current 260A, and laser-arc spacing is 3mm,
Speed of welding is 600mm/min, and welding gun protection gas uses Ar gas, flow 20L/min, and protection temperature degree is -30 DEG C；Paraxonic is protected
Shield gas uses Ar gas, flow 15L/min, and temperature is -60 DEG C, wire feed rate 4m/min；
Step 4:During actual welding, using robot integrated system control welding condition, the electricity of MIG first
The arc starting the arc, then after 1~2s of arc stability, then laser control sends laser, and last control machine people causes laser work
Head and TIG welding guns associated movement complete welding process.
The metallograph of the present embodiment welding 6.6mm thickness high-strength steel is as shown in Figure 8.
The method of the present embodiment has the advantage that：
1st, welding efficiency improves, and due to protecting the strong cooling effect of gas, electric arc substantially shrinks, current density improves, fusion penetration
Increase and molten wide reduction, can be welded using smaller groove, especially when cut deal welds, further compression arc, reduced
Side wall melts.Meanwhile arc welding gun is cooled down, reduce tungsten electrode scaling loss/avoid welding gun from overheating, can continuously the long period enter
The big normative operation of row；
2nd, suppress stomata and fire check, because molten bath cooling velocity improves, be advantageous to suppress conventional laser-electric arc combined weldering
When the metallurgy type stomata that is also easy to produce of fusion line position and Weld pipe mill fire check, reduce weld defect；
3rd, mechanical property is improved, under larger cooling velocity, weld grain refinement, column crystal direction is varied from, together
When reduced due to thermal weld stress, welding joint softened phenomenon makes moderate progress, and improves the comprehensive mechanical property of welding point.
4th, long weld seam welding stability is improved, because paraxonic protection gas can effectively suppress laser plasma, ensures entering
Weld seam monolithic molding is good when the long weld seam of row welds.
Claims (7)
1. a kind of welding method for improving laser-arc hybrid welding in industry process stability, it is characterised in that it is according to following step
Suddenly carry out：
Step 1：Before welding, the position to be welded of workpiece to be welded is processed into double V-groove, U-shaped groove or Y type grooves, and pair plus
Groove and both side surface after work are polished and cleaned, and the workpiece to be welded after polishing or cleaning is fixed on into welding tool setup
On；
Step 2：Laser head and arc welding gun and paraxonic protection gas jets are rigidly fixed using fixture；
Step 3：Welding condition is set:
Backing welding：Defocusing amount is ﹣ 3~﹢ 3mm, and laser power is 3000~8000W, and arc current is 100~200A, and laser is electric
Arc spacing is 3~5mm, and speed of welding is 0.6 ~ 2m/min；Welding gun protection gas uses pure Ar gas, and protection air-flow amount is 20~40L/
Min, protection temperature degree are -30 DEG C~-160 DEG C, and paraxonic protection gas uses Ar gas, and flow is 15~30L/min, and temperature is -50
DEG C~-160 DEG C；
Filling weldering：Defocusing amount is ﹣ 3~﹢ 3mm, and laser power is 400~800W, and arc current is 200~400A, laser-arc
Spacing is 2~5mm, and speed of welding is 50~600mm/min, and welding gun protection gas uses Ar gas, and flow is 10~20L/min, is protected
It is -30 DEG C~-160 DEG C to protect temperature degree；Paraxonic protection gas use Ar gas, and flow is 15~30L/min, temperature for -50 DEG C~-
160℃；
Step 4：During actual welding, welding condition, first Arc are controlled using robot integrated system,
Then 1~2s of arc stability, laser control send laser, and last control machine people causes laser work head and welding gun to transport jointly
It is dynamic to complete welding process；Workpiece to be welded is steel, aluminium or titanium alloy.
2. a kind of welding method for improving laser-arc hybrid welding in industry process stability according to claim 1, its feature
Welding gun protection temperature degree is -50 DEG C~-160 DEG C during being backing welding.
3. a kind of welding method for improving laser-arc hybrid welding in industry process stability according to claim 2, its feature
Welding gun protection temperature degree is -80 DEG C~-120 DEG C during being backing welding.
4. a kind of welding method for improving laser-arc hybrid welding in industry process stability according to claim 1, its feature
Paraxonic protection temperature degree is -80 DEG C~-120 DEG C during being backing welding.
5. a kind of welding method for improving laser-arc hybrid welding in industry process stability according to claim 4, its feature
Paraxonic protection temperature degree is -80 DEG C~-100 DEG C during being backing welding.
6. a kind of welding method for improving laser-arc hybrid welding in industry process stability according to claim 1, its feature
It is during filling weldering that welding gun protection temperature degree is -50 DEG C~-120 DEG C.
7. a kind of welding method for improving laser-arc hybrid welding in industry process stability according to claim 1, its feature
It is during filling weldering that paraxonic protection temperature degree is -80 DEG C~-120 DEG C.
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| CN106862771B (en) * | 2017-03-17 | 2019-03-05 | 石家庄铁道大学 | A kind of laser assisted melt pole electrical arc increasing material connection method for high temperature alloy |
| CN107283060A (en) * | 2017-06-07 | 2017-10-24 | 广东省焊接技术研究所（广东省中乌研究院） | A kind of laser-arc is combined multi-pass welding method |
| CN107971635B (en) * | 2017-11-24 | 2019-04-12 | 哈尔滨工业大学 | A kind of cut deal angle joint light beam-welding wire dislocation laser-MAG compound welding method |
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| CN105328342A (en) * | 2015-12-08 | 2016-02-17 | 哈尔滨工业大学 | Method for removing laser welding pores of medium-thick D406A ultra-high-strength steel |
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