Laser electrical arc complex welding method for intensifying current magnetohydrodynamics effect
A magnetic hydrodynamic and laser arc technology, applied in laser welding equipment, arc welding equipment, welding equipment and other directions, can solve the problems of narrow welding seam and poor gap adaptability, and achieve the improvement of welding seam surface forming, improving surface forming, The effect of improving stability
Inactive Publication Date: 2009-08-26
BEIJING UNIV OF TECH
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Problems solved by technology
In this case, a set of external power supply is required to provide auxiliary current to the welding area, and at the same time, due to the narrow weld seam after welding, its gap adaptability is poor
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[0016] For the technical solution of this embodiment, refer to the appended figure 1 , the laser-arc coordinated arrangement is adopted, and the filler wire 3 is added at the same time. The arc 10 and the welding wire 3 are respectively arranged on both sides of the laser beam 5, wherein the welding wire 3 is located in front of the laser beam 5, and the arc 10 is placed behind the laser beam 5. The arc 10 may be a TIG arc or a plasma arc.
[0017] The filler wire 3 is fed in from the front of the molten pool 11 , and the welding current flows from the welding wire 3 through the molten pool 11 and the arc 10 to form a current loop. Most of its current flows through the molten pool, generating electromagnetic force in the molten pool.
[0018] During welding, the two poles of the welding power source 1 are respectively connected to the tungsten pole 8 and the welding wire 3, and most of the welding current flows through the welding pool 11 through the welding wire 3, which str...
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The invention relates to a laser-arc compound welding method for strengthening current magnetohydrodynamic effect, which belongs to the technical field of laser material processing. The present invention adopts laser-arc coordinated arrangement, and adds filler welding wire at the same time, wherein the arc and welding wire are respectively arranged on both sides of the laser beam, the welding wire is located in front of the laser beam and contacts the workpiece, and the arc is arranged behind the laser beam. When welding, the two poles of the welding power supply are respectively connected to the tungsten pole and the welding wire. The welding current passes through the molten pool and the arc from the welding wire to form a current loop. Most of the welding current flows through the molten pool, generating electromagnetic force in the molten pool and making full use of the magnetic fluid of the arc current The influence of kinetic effects on the molten pool flow state and heat exchange conditions enhances the energy coupling efficiency and improves the stability of the welding process. At the same time, because the arc is located behind the molten pool, the tolerance to the fluctuation of the welding wire is greatly improved, and the surface shape of the weld is significantly improved.
Description
technical field [0001] The invention relates to a laser arc hybrid welding method which strengthens the current magnetohydrodynamic effect, and belongs to the technical field of laser material processing. Background technique [0002] Laser welding has outstanding advantages such as high energy density, fast welding speed, small heat input, small welding deformation, and excellent joint performance. It is considered to be the most advanced material joining technology. However, due to the poor bridging performance of pure laser welding, the requirements for workpiece groove preparation and assembly accuracy are extremely high, which largely restricts the industrial application of laser welding technology. At the end of the 1970s, British scholars proposed the concept of laser and TIG (non-melting inert gas shielded welding) arc hybrid heat source welding. At present, laser-arc hybrid welding has become one of the frontiers of laser welding technology research. [0003] Laser...
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IPC IPC(8): B23K28/02B23K9/00B23K26/20B23K26/348
Inventor肖荣诗吴世凯杨武雄张松张寰臻陈铠
OwnerBEIJING UNIV OF TECH