A method of multi-focus laser enhanced arc hybrid welding

Abstract

A multi-focus laser-enhanced arc hybrid welding method provides four heat sources: single-focus laser, welding torch arc, and double-focus heat sources, which are arranged in series in the welding direction in sequence, and can change the laser power and the current and current of the welding torch system. voltage to achieve different heat output, and realize the welding mode required by the field. The dual-focus laser used in the present invention is divided into dual-focus laser beams by an optical beam splitting system. The staggered movement can fully and effectively stir the molten pool. When its high power acts as a welding heat source, it is beneficial to increase the penetration depth, stir the molten pool, and effectively reduce pores and spatter. At the same time, by fine-tuning the focal length of the double focus, the weld can be adjusted Depth of penetration and width of penetration. When its low power is used as a heat source for heat treatment, it is beneficial to improve the smoothness of the welding surface, the uniformity of the weld, reduce the pores and spatter, and improve the quality of the weld.

Description

technical field [0001] The invention specifically relates to the technical field of material processing engineering, in particular to a method for multi-focus laser enhanced arc hybrid welding. Background technique [0002] Laser welding is a new welding method with high energy density, high welding speed, high precision and good for obtaining dense weld structure. Laser welding is one of the important aspects of the application of laser material processing technology, mainly widely used in aerospace, automobile industry, electronics industry and so on. With the rapid development of modern industry, the conventional laser welding technology can no longer meet the needs due to its own defects, such as: the high thermal conductivity of the material to be welded, low ionization energy and high reflectivity to the laser make the optical welding process stable The performance is very poor, which eventually leads to poor weld formation, large fluctuations in penetration depth, hi...

AI Technical Summary

Problems solved by technology

With the rapid development of modern industry, the conventional laser welding technology can no longer meet the needs due to its own defects, such as: the high thermal conductivity of the material to be welded, low ionization energy and high reflectivity to the laser make the optical welding process stable Poor performance, which eventually leads to poor weld formation, large fluctuations in penetration depth, high weld porosity, high precision requirements for laser assembly, and expensive equipment.

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