Laser processing equipment is one of the most promising areas for laser applications and more than 20 laser processing technologies have been developed. Laser welding is an important technology in laser processing. The quality of the laser processing equipment is directly related to the intelligence and precision of the welding system. An excellent welding system will inevitably result in a perfectly welded product.
Laser welding systems generally consist of a laser, an optical system, a laser processing machine, a process parameter detection system, a shielding gas delivery system, and a control and detection system. The laser is the core of the laser welding system.
The use of laser welding has the advantages of high precision, high efficiency, high strength and timeliness, ensuring quality, yield and delivery. At present, laser welding has become a highly competitive processing means in the precision processing industry, and is widely used for spot welding, lap welding and seal welding of workpieces with special requirements in the mechanical, electronic, battery, aviation, instrumentation and other industries. The use of laser welding has the advantages of high precision, high efficiency, high strength and timeliness, ensuring quality, yield and delivery. At present, laser welding has become a very competitive processing means in the precision processing industry, and is widely used for spot welding, lap welding and seal welding of workpieces with special requirements in the mechanical, electronic, battery, aviation, instrumentation and other industries.
Laser welding requires a laser with a high rated output power, a wide power adjustment range and the ability to slowly increase or decrease power to ensure quality at the start and end of the weld, stable and reliable operation and a low order or base mode for the cross mode.
Lasers that can be used for welding include CO2 lasers, YAG lasers, LD-pumped solid-state lasers, fibre lasers and semiconductor lasers. High power semiconductor lasers have matured and commercial laser power has reached several kilowatts. The beam energy is evenly distributed, the shape of the light spot can be adjusted at will according to needs, the electro-optical conversion efficiency is high, the structure is compact, light weight, small size, easy to apply on site. The beam energy is evenly distributed, the spot shape can be adjusted as desired, the electro-optical conversion efficiency is high, the structure is compact, light weight, small size, easy to apply in the field.
China's laser welding is at the world's advanced level, with the technology and ability to use laser forming of complex titanium alloy components of more than 12 square metres, and has invested in the manufacture of prototypes and products for a number of domestic aviation research projects.
At present, laser welding machine technology has been widely used in high-precision manufacturing fields such as automobiles, ships, aircraft and high-speed rail. It has greatly improved the quality of people's lives and led the home appliance industry into the era of precision work. Especially after the 42m seamless welding technology created by VW has greatly improved the integrity and stability of the body, the leading home appliance company Haier Group proudly launched the first washing machine produced with laser seamless welding technology. Through this appliance technology, people cherish and value science and technology even more, and advanced laser technology can make a huge difference to people's lives.
