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With the rapid development of laser technology, laser application technology is more and more widely used in automotive, aerospace, defense industry, shipbuilding, marine engineering, nuclear power equipment, high-tech electronics, precision machining, biomedicine and other fields. As a direction of laser application, laser welding machine is based on the combination of traditional processing technology and modern laser technology. Due to the high power density and fast energy release of laser welding, the processing efficiency is higher than that of traditional methods, and laser welding processing has more superior processing characteristics than traditional processing.

Laser welding is the use of high-energy laser pulses to locally heat the material in a small area. The energy of the laser radiation diffuses into the interior of the material through heat conduction, and the material is melted to form a specific molten pool. It is a new type of welding method, mainly for the welding of thin-walled materials and precision parts, and can realize spot welding, butt welding, stitch welding, sealing welding, etc. Small deformation, fast welding speed, smooth and beautiful welding seam, no need or simple treatment after welding, high welding seam quality, no pores, precise control, small focusing spot, high positioning accuracy, and easy automation. The traditional process needs to use sheet stacking for welding, and laser welding does not need to contact the surface of the processed item during the entire process, so the laser processing process has advantages that traditional welding methods cannot match.

In order to improve the precision of welding, it is necessary to continuously upgrade the laser welding machine, which makes the laser welding technology more and more widely used in the field of micro-processing. Due to the defects of traditional welding processing, laser welding gradually replaces the traditional processing method.