A method of arc-assisted laser welding

Abstract

A method for arc-assisted laser welding. The dual-focus laser used in the present invention consists of a single laser beam, which is divided into dual-focus laser beams by an optical beam splitting system. The focus points of the dual-beam lasers vertically distributed along the direction of the welding seam can be interlaced with each other, which is sufficient and effective. When its high power acts as a welding heat source, it is beneficial to increase the penetration depth, agitate the molten pool, and effectively reduce pores and splashes. At the same time, by fine-tuning the focal length of the double focus, the weld penetration depth and fusion width can be adjusted. . When its low power acts as a heat source for heat treatment, it is beneficial to improve the smoothness of the welding surface, the uniformity of the weld, reduce pores and spatter, and improve the quality of the weld. In the method of the present invention, the laser energy is dominant, and a low-power single-focus laser is used. Pre-weld heat treatment of the workpiece with the arc, through the plasma interaction between the arc and the double-focus laser heat source, the absorption rate of laser energy is improved to enhance the laser "hole" effect to obtain greater welding penetration or welding speed.

Description

technical field [0001] The invention specifically relates to the technical field of material processing engineering, in particular to an arc-assisted laser welding method. 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, high weld porosity, high...

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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