CN117564470A - laser-CMT (chemical vapor deposition) composite welding method for butt-jointed thin plates of low-resistivity material - Google Patents
laser-CMT (chemical vapor deposition) composite welding method for butt-jointed thin plates of low-resistivity material Download PDFInfo
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- CN117564470A CN117564470A CN202311553002.9A CN202311553002A CN117564470A CN 117564470 A CN117564470 A CN 117564470A CN 202311553002 A CN202311553002 A CN 202311553002A CN 117564470 A CN117564470 A CN 117564470A
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- 238000003466 welding Methods 0.000 title claims abstract description 274
- 239000000463 material Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000002131 composite material Substances 0.000 title claims abstract description 21
- 238000005229 chemical vapour deposition Methods 0.000 title description 2
- 239000010953 base metal Substances 0.000 claims abstract description 32
- 210000001503 joint Anatomy 0.000 claims abstract description 6
- 230000001681 protective effect Effects 0.000 claims abstract description 5
- 238000004381 surface treatment Methods 0.000 claims abstract description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 13
- 230000007704 transition Effects 0.000 description 8
- 230000007547 defect Effects 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 238000010891 electric arc Methods 0.000 description 5
- 238000005457 optimization Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000002508 compound effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- 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
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention belongs to the technical field of laser welding, and particularly relates to a laser-CMT composite welding method for a low-resistivity material butt joint thin plate, which comprises the following steps: s1, performing surface treatment on a base material, and butting the base material; s2, sequentially arranging a TIG welding assembly and a CMT welding assembly at the joint of the base metal along the welding direction; s3, arranging a first welding wire on one side of the TIG welding assembly far away from the CMT welding assembly, wherein one end of the first welding wire is positioned in a joint of the base metal and is opposite to the TIG welding assembly; s4, arranging a laser assembly at the joint of the base material, wherein the laser assembly is positioned between the TIG welding assembly and the CMT welding gun head; s5, arranging a protective gas nozzle right below the joint of the base material, wherein the protective gas nozzle is located right below the laser component; s6, switching on a power supply and starting welding. The invention can reduce the welding porosity, improve the coarse weld joint structure and improve the welding mechanical property.
Description
Technical Field
The invention belongs to the technical field of laser welding, and particularly relates to a laser-CMT composite welding method for a low-resistivity material butt-joint thin plate.
Background
As one of the most potential welding technologies in the 21 st century, the laser and the composite welding technology thereof have the characteristics of high tolerance rate of welding assembly precision, easy realization of engineering application, high energy density, small welding heat input, good weld joint forming and performance, high welding efficiency and the like, and are widely applied to national defense weaponry and the social national economy fields of aerospace, automobiles, shipbuilding, petroleum pipelines and the like, and become one of the most potential manufacturing means. CMT is a cold metal transition technique that controls the feeding and withdrawal of welding wire digitally to achieve a stable short circuit transition and thereby control the amount of heat input during the welding process. The method is particularly suitable for welding thin plates because of small welding deformation, small heat input and small splashing. However, because of the small heat input, the pure CMT is easy to have the characteristics of undeployed molten pool, overlarge post-welding residual height and the like during welding.
By low resistivity material is meant a material having a resistivity of not more than 5.0X10 -7 Omega.m materials. The low-resistivity metal material has high reflection to laser and high heat conductivity, so that when the laser filler wire welding mode is adopted for welding, the laser energy utilization rate is low, and a laser with higher power is needed, so that the production cost is increased. Because the low-resistivity metal material oxide film has a high melting point, the loose oxide film is easy to absorb water vapor in the air, and the defects of hydrogen pores, oxide film pores and the like are easy to form in the welding process.
Chinese patent (publication No. CN 101811231A) discloses that pure Ar gas is adopted for welding; forming a new composite heat source by the cold metal transition arc and the laser beam with the power more than or equal to 800; the laser beam is defocused, and the diameter of a laser spot on the surface of the welded workpiece is 1-4mm; spots of the cold metal transition arc can be positioned in front of or behind the spots of the laser beam, and the center-to-center distance L between the two spots is 0-8mm; the included angle between the welding gun of the cold metal transition arc and the horizontal plane is 45-75 degrees. The composite heat source is mainly used for welding plates and pipes of stainless steel, high-strength steel and nickel-based alloys. When the welding wire is fed forward or drawn back, the welding wire is closer to the laser beam, so that impact can be caused on a keyhole formed by the laser beam, the stability of the keyhole is reduced, the porosity of a welding seam is increased, and a better composite effect cannot be formed when the welding wire is farther from the laser beam.
Disclosure of Invention
The invention aims to provide a laser-CMT composite welding method for butt-joint thin plates of low-resistivity materials, which aims to solve the problems, reduce the welding porosity, improve the coarse weld joint structure and improve the welding mechanical property.
In order to achieve the above object, the present invention provides the following solutions:
a laser-CMT composite welding method for butt joint thin plates of low-resistivity materials comprises the following steps:
s1, carrying out surface treatment on a base metal to be welded, and butting the base metal;
s2, sequentially arranging a first welding wire, a TIG welding assembly, a laser assembly and a CMT welding assembly at the joint of the base metal along the welding direction; one end of the first welding wire is positioned in the joint of the base metal and is opposite to the TIG welding assembly;
s3, switching on the TIG welding assembly, the CMT welding assembly, the first welding wire and the laser assembly and starting welding.
Preferably, in step S2, the TIG welding assembly includes a first TIG welding gun and a second TIG welding gun, where the first TIG welding gun is located on the front surface of the base material, the second TIG welding gun is located on the back surface of the base material, welding nozzles of the first TIG welding gun and the second TIG welding gun are located at a joint of the base material and are opposite to each other, and one end of the first welding wire is located between the first TIG welding gun and the second TIG welding gun.
Preferably, in step S2, the laser assembly includes a first laser beam and a second laser beam, where the power of the first laser beam is greater than that of the second laser beam, the first laser beam and the second laser beam are both located at the joint of the base metal, the first laser beam is close to the first TIG welding gun, the second laser beam is close to the CMT welding assembly, and a shielding gas nozzle is disposed right below a molten pool formed by the first laser beam, and the shielding gas nozzle is located below the joint of the base metal.
Preferably, in step S2, the CMT welding assembly includes a CMT welding gun, a welding tip of the CMT welding gun is located at a joint of the base metal, the CMT welding gun is located at a side of the second laser beam away from the first laser beam, the CMT welding gun is electrically connected with a positive electrode of a CMT power supply, and a negative electrode of the CMT power supply is electrically connected with the base metal.
Preferably, in step S3, the first welding wire is electrically connected to an anode of a hot wire power supply, a cathode of the hot wire power supply is electrically connected to the first TIG welding gun, the first TIG welding gun is electrically connected to a cathode of the TIG power supply, and the anode of the TIG power supply is electrically connected to the second TIG welding gun.
Preferably, in step S1, the thickness of the base material is equal to or less than 5mm, and the joint width of the base material is 0.01mm to 5mm.
Preferably, the distance between the first laser beam and the second laser beam is 0.6 mm-15 mm, and the distance between the CMT welding gun and the light wire of the second laser beam is 0-1 mm.
Preferably, the first TIG welding gun and the second TIG welding gun are symmetrically arranged along the base material, an angle between the first TIG welding gun and the base material along the welding direction is 60-90 degrees, a heat source distance between the first TIG welding gun and the first laser beam is 0-8mm, and a distance between a tungsten electrode of the first TIG welding gun and the first welding wire is 0.1-2 mm.
Preferably, an angle between the first welding wire and the base material in the welding direction is 10 ° to 80 °.
Compared with the prior art, the invention has the following advantages and technical effects:
the TIG welding assembly, the CMT welding assembly, the first welding wire and the laser assembly are powered on, so that the melting and filling efficiency of the first welding wire is obviously improved, a series of welding problems caused by welding heat input such as welding deformation, welding cracks, thick base metal tissues and the like are reduced, and the stability of an electric arc is less influenced while the welding speed is improved; the first welding wire is preset in the joint before welding, so that the butt joint can be filled efficiently after the first welding wire is melted, and the wettability and spreadability of the first welding wire after the first welding wire is melted can be improved through the swinging of the first welding wire and the action of an electric arc between the first welding wire and the TIG welding assembly; the CMT welding component is positioned on one side of a molten pool formed by the laser component, so that the welding defect problems such as undercut, indent and the like on the surface of a base metal can be avoided, and the gas sprayed by the protective gas nozzle can play a role in lifting the molten pool, so that the raised welding defect on the back surface of the base metal is prevented; when the welding wire of the CMT welding assembly is fed forward or pumped back, the laser assembly can play a composite role of attracting the compressed arc, so that the stability of the arc and the stability of molten drop transition are improved, meanwhile, the first welding wire cannot impact a keyhole formed by the high-energy laser assembly, the stability of the keyhole is improved, and the porosity of a welding seam is reduced.
Drawings
For a clearer description of an embodiment of the invention or of the solutions of the prior art, the drawings that are needed in the embodiment will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art:
FIG. 1 is a schematic diagram of a welding method of the present invention;
FIG. 2 is a schematic view of a longitudinal section of a weld obtained by conventional laser-CMT hybrid welding;
FIG. 3 is a schematic view of a longitudinal section of a weld obtained by the welding method of the present invention.
Wherein, 1, CMT welding gun; 2. a second laser beam; 3. a first laser beam; 4. a first TIG welding gun; 5. a wire feeding tube; 6. a first welding wire; 7. a hot wire power supply; 8. a TIG power supply; 9. a second TIG welding gun; 10. a shielding gas nozzle; 11. a shielding gas; 12. a base material; 13. a key hole; 14. a molten pool; 15. CMT power supply.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Referring to fig. 1-3, the invention provides a laser-CMT composite welding method for butt-joint thin plates of low-resistivity materials, which comprises the following steps:
s1, carrying out surface treatment on a base metal 12 to be welded, and butting the base metal 12;
s2, sequentially arranging a first welding wire 6, a TIG welding assembly, a laser assembly and a CMT welding assembly at the joint of the base metal 12 along the welding direction; one end of the first welding wire 6 is positioned in the joint of the base metal 12 and is arranged opposite to the TIG welding assembly;
and S3, switching on a power supply of the TIG welding assembly, the CMT welding assembly, the first welding wire 6 and the laser assembly, and starting welding.
The first welding wire 6 is preset in the joint before welding, the wire feeding pipe 5 is sleeved on the side wall of the first welding wire 6, the wire feeding pipe 5 is used for stably feeding the welding wire, the butt joint can be filled efficiently after the first welding wire 6 is melted, and the wettability and spreadability of the first welding wire 6 at the joint after the first welding wire 6 is melted can be improved through the swinging of the first welding wire 6 and the action of an electric arc between the first welding wire 6 and a TIG welding assembly;
the CMT welding component is positioned on one side of the molten pool 14 formed by the laser component, so that the welding defect problems such as undercut, indent and the like on the surface of the base metal 12 can be avoided; the TIG welding assembly, the CMT welding assembly, the first welding wire 6 and the laser assembly are powered on, so that the melting and filling efficiency of the first welding wire 6 is obviously improved, a series of welding problems caused by welding heat input such as welding deformation, welding cracks, coarse base metal 12 structure and the like are reduced, and the stability of an electric arc can be influenced less while the welding speed is improved;
when welding is started, the welding gun and the synchronous swinging device are connected through the automatic welding robot arm, and the swinging direction of the synchronous swinging device is as follows: the swing mode is a straight shape, an O shape, an 8 shape and the like along the horizontal plane perpendicular to the welding direction, the problem that the side wall of a large butt joint gap is not fused is solved, and the automatic welding robot is in the prior art and is not described herein. The wire feeder drives the first welding wire 6 to feed wires, the wire feeding speed of the first welding wire 6 is 1-20 m/min, the flow of the shielding gas 11 of the shielding gas nozzle 10 is 1-200L/min, the shielding gas 11 sprayed out of the shielding gas nozzle 10 can lift the molten pool 14, the bulge welding defect on the back surface of the base metal 12 is prevented, when the welding wire of the CMT welding assembly is fed forward or pumped back, the laser assembly can play a role in sucking the compression arc, the arc stability and the stability of molten drop transition are improved, meanwhile, the first welding wire 6 is melted and filled in advance, the keyhole 13 formed by the laser assembly with large energy is far away, the impact is not caused on the keyhole 13, the stability of the keyhole 13 is improved, and the porosity of the welding seam is reduced.
In a further optimized scheme, in step S2, the TIG welding assembly includes a first TIG welding gun 4 and a second TIG welding gun 9, the first TIG welding gun 4 is located on the front face of the base metal 12, the second TIG welding gun 9 is located on the back face of the base metal 12, welding nozzles of the first TIG welding gun 4 and the second TIG welding gun 9 are located at a joint of the base metal 12 and are just right opposite to each other, and one end of the first welding wire 6 is located between the first TIG welding gun 4 and the second TIG welding gun 9.
The first welding wire 6 is melted by providing the first TIG welding torch 4 and the second TIG welding torch 9.
In a further optimization scheme, in the step S2, the laser assembly comprises a first laser beam 3 and a second laser beam 2, the power of the first laser beam 3 is larger than that of the second laser beam 2, the first laser beam 3 and the second laser beam 2 are both positioned at the joint of the base metal 12, the first laser beam 3 is close to the first TIG welding gun 4, the second laser beam 2 is close to the CMT welding assembly, a shielding gas nozzle 10 is arranged right below a molten pool 14 formed by the first laser beam 3, and the shielding gas nozzle 10 is positioned below the joint of the base metal 12.
In a further optimized scheme, in step S2, the CMT welding assembly includes a CMT welding gun 1, a welding nozzle of the CMT welding gun 1 is located at a joint of the base metal 12, the CMT welding gun 1 is located at a side of the second laser beam 2 away from the first laser beam 3, the CMT welding gun 1 is electrically connected with a positive electrode of a CMT power supply 15, and a negative electrode of the CMT power supply 15 is electrically connected with the base metal 12.
When the welding wire of the CMT welding gun 1 is fed forward or drawn back, the light wire distance between the second laser beam 2 and the welding wire is relatively close, so that the compound effect of attracting the compressed arc is achieved, the arc stability and the stability of molten drop transition are improved, when the welding wire of the CMT welding gun 1 is fed forward or drawn back, the welding wire is far away from the first laser beam 3, the impact on a keyhole 13 formed by the first laser beam 3 is avoided, the stability of the keyhole 13 is improved, and the porosity of a welding seam is reduced;
the wire feeding speed of the CMT welding gun 1 is 0.1-10 m/min, the welding current of the CMT welding gun 1 is 10-300A, and the CMT welding gun 1 is positioned behind a molten pool 14 formed by the first laser beam 3, so that the problems of welding defects such as undercut, indent and the like on the surface of a base material can be avoided.
In a further optimized scheme, in step S3, the first welding wire 6 is electrically connected with the positive electrode of the hot wire power supply 7, the negative electrode of the hot wire power supply 7 is electrically connected with the first TIG welding gun 4, the first TIG welding gun 4 is electrically connected with the negative electrode of the TIG power supply 8, and the positive electrode of the TIG power supply 8 is electrically connected with the second TIG welding gun 9.
The current of the TIG power supply 8 is 10A-100A, and the current of the hot wire power supply 7 is 5-200A;
referring to fig. 2, the longitudinal section of the weld obtained by the conventional laser-CMT composite welding has defects of upper concave and lower convex, and the porosity of the weld is high. This is because: when the distance between the laser and the CMT arc is relatively short, the welding wire is easy to impact a keyhole to generate bubbles after being melted, so that process air holes are generated;
referring to fig. 3, the upper part and the lower part of the longitudinal section of the welding seam obtained by the method are smoother, and the porosity of the welding seam is lower. This is because: the negative pole and the first TIG welder 4 electric connection of TIG power 8, the anodal and the second TIG welder 9 electric connection of TIG power 8, the anodal and the first welding wire 6 electric connection of hot wire power 7, negative pole and first TIG welder 4 electric connection can realize that two electric arcs melt first welding wire 6, obviously improved first welding wire 6 and melt, fill efficiency, TIG power 8, hot wire power 7 do not connect parent metal 12 moreover, two electric arcs are less to the heat input of parent metal 12 like this, a series of welding problems such as welding deformation, welding crack, parent metal 12 tissue are thick and arouse by welding heat input have been reduced, moreover can be less to the stability influence of electric arc when improving welding speed.
In a further optimization scheme, the distance between the first laser beam 3 and the second laser beam 2 is 0.6 mm-15 mm, and the distance between the CMT welding gun 1 and the second laser beam 2 is 0-1 mm.
According to a further optimization scheme, the first TIG welding gun 4 and the second TIG welding gun 9 are symmetrically arranged along the base metal 12, the angles between the first TIG welding gun 4 and the second TIG welding gun 9 and the base metal 12 along the welding direction are 60-90 degrees, the heat source distance between the first TIG welding gun 4 and the first laser beam 3 is 0-8mm, and the distance between the tungsten electrode of the first TIG welding gun 4 and the first welding wire 6 is 0.1-2 mm.
The power of the first laser beam 3 is 800-10000W, the power of the second laser beam 2 is 60-3000W, and the welding speed is 0.1-10 m/min.
In a further optimized scheme, the angle between the first welding wire 6 and the base metal 12 along the welding direction is 10-80 degrees.
In a further optimization scheme, the distance between the first laser beam 3 and the second laser beam 2 is 0.6 mm-15 mm, and the distance between the CMT welding gun 1 and the second laser beam 2 is 0-1 mm.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (9)
1. The laser-CMT composite welding method for the butt joint thin plates of the low-resistivity materials is characterized by comprising the following steps of:
s1, carrying out surface treatment on a base material (12) to be welded, and butting the base material (12);
s2, sequentially arranging a first welding wire (6), a TIG welding assembly, a laser assembly and a CMT welding assembly at the joint of the base metal (12) along the welding direction; one end of the first welding wire (6) is positioned in the joint of the base metal (12) and is opposite to the TIG welding assembly;
s3, switching on the TIG welding assembly, the CMT welding assembly, the first welding wire (6) and the laser assembly and starting welding.
2. The laser-CMT composite welding method of low-resistivity material butt-joint thin plate according to claim 1, wherein in step S2, the TIG welding assembly comprises a first TIG welding gun (4) and a second TIG welding gun (9), the first TIG welding gun (4) is located on the front side of the base material (12), the second TIG welding gun (9) is located on the back side of the base material (12), welding nozzles of the first TIG welding gun (4) and the second TIG welding gun (9) are located at a joint of the base material (12) and are opposite to each other, and one end of the first welding wire (6) is located between the first TIG welding gun (4) and the second TIG welding gun (9).
3. The laser-CMT composite welding method of low resistivity material butt-joint sheets as defined in claim 2, wherein in step S2, the laser assembly comprises a first laser beam (3) and a second laser beam (2), the power of the first laser beam (3) is larger than that of the second laser beam (2), the first laser beam (3) and the second laser beam (2) are both positioned at the joint of the base material (12), the first laser beam (3) is close to the first TIG welding gun (4), the second laser beam (2) is close to the CMT welding assembly, a protective gas nozzle (10) is arranged right below a molten pool (14) formed by the first laser beam (3), and the protective gas nozzle (10) is positioned below the joint of the base material (12).
4. A low resistivity material butt sheet laser-CMT composite welding method as claimed in claim 3, wherein in step S2, the CMT welding assembly comprises a CMT torch (1), a welding tip of the CMT torch (1) is located at a joint of the base material (12), the CMT torch (1) is located at a side of the second laser beam (2) away from the first laser beam (3), the CMT torch (1) is electrically connected with an anode of a CMT power supply (15), and a cathode of the CMT power supply (15) is electrically connected with the base material (12).
5. The laser-CMT composite welding method of claim 2, wherein in step S3, the first welding wire (6) is electrically connected with a positive electrode of a hot wire power supply (7), a negative electrode of the hot wire power supply (7) is electrically connected with the first TIG welding gun (4), the first TIG welding gun (4) is electrically connected with a negative electrode of a TIG power supply (8), and a positive electrode of the TIG power supply (8) is electrically connected with the second TIG welding gun (9).
6. The laser-CMT hybrid welding method of butt-joint sheets of low-resistivity material according to claim 1, wherein in step S1, the thickness of the base material (12) is equal to or less than 5mm, and the joint width of the base material (12) is 0.01mm to 5mm.
7. The laser-CMT composite welding method for butt-joint thin plates of low-resistivity material according to claim 4, wherein the distance between the first laser beam (3) and the second laser beam (2) is 0.6-15 mm, and the distance between the CMT welding gun (1) and the second laser beam (2) is 0-1 mm.
8. A low resistivity material butt sheet laser-CMT composite welding method as claimed in claim 3, wherein the first TIG welding gun (4) and the second TIG welding gun (9) are symmetrically arranged along the base material (12), an angle between the first TIG welding gun (4) and the second TIG welding gun (9) and the base material (12) along a welding direction is 60 ° to 90 °, a heat source distance between the first TIG welding gun (4) and the first laser beam (3) is 0mm to 8mm, and a distance between a tungsten electrode of the first TIG welding gun (4) and the first welding wire (6) is 0.1mm to 2mm.
9. A low resistivity material butt sheet laser-CMT composite welding method as claimed in claim 1, wherein the angle between the first welding wire (6) and the base material (12) in the welding direction is 10-80 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311553002.9A CN117564470A (en) | 2023-11-21 | 2023-11-21 | laser-CMT (chemical vapor deposition) composite welding method for butt-jointed thin plates of low-resistivity material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311553002.9A CN117564470A (en) | 2023-11-21 | 2023-11-21 | laser-CMT (chemical vapor deposition) composite welding method for butt-jointed thin plates of low-resistivity material |
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| Publication Number | Publication Date |
|---|---|
| CN117564470A true CN117564470A (en) | 2024-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311553002.9A Pending CN117564470A (en) | 2023-11-21 | 2023-11-21 | laser-CMT (chemical vapor deposition) composite welding method for butt-jointed thin plates of low-resistivity material |
Country Status (1)
| Country | Link |
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| CN (1) | CN117564470A (en) |
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2023
- 2023-11-21 CN CN202311553002.9A patent/CN117564470A/en active Pending
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