Laser processing equipment is one of the most promising fields of laser application, and more than 20 kinds of laser processing technologies have been developed so far. Laser welding is an important technology in laser processing. The quality of laser processing equipment is directly related to the intelligence and precision of the welding system. An excellent welding system will inevitably produce perfect welding products.
A laser welding system generally consists of a laser, an optical system, a laser processing machine, a process parameter detection system, a protective gas delivery system, and a control and detection system. The laser is the heart of the laser welding system.
The use of laser welding has the advantages of high precision, high efficiency, high strength and timeliness, ensuring quality, output and delivery time. At present, laser welding has become a very competitive processing method in the precision processing industry. It is widely used in spot welding, lap welding and sealing welding of workpieces with special requirements in industries such as machinery, electronics, batteries, aviation, and instrumentation.
Laser welding requires the laser to have a higher rated output power, a wider power adjustment range, and the ability to slowly increase or decrease the power to ensure the quality of the beginning and end of the weld. The work is stable and reliable, and the transverse mode is low-order model or base model. Lasers that can be used for welding include CO2 lasers, YAG lasers, LD pumped solid-state lasers, fiber lasers and semiconductor lasers. High-power semiconductor lasers have become mature, and the commercial laser power has reached several kilowatts. The beam energy distribution of the invention is uniform, the shape of the light spot can be adjusted arbitrarily according to needs, the electro-optic conversion efficiency is high, the structure is compact, the weight is light, the volume is small, and it is convenient for on-site application. The disadvantage is that the beam quality is average and the divergence is high.