4. Electronics Industry
Laser welding has been widely used in electronic industry, especially in microelectronics industry. Due to the small heat affected zone, rapid heating concentration and low thermal stress, laser welding shows unique advantages in the packaging of integrated circuits and semiconductor device shells. In the development of vacuum devices, laser welding has also been applied, such as molybdenum focusing electrode and stainless steel support ring, fast heating cathode filament assembly, etc. The thickness of elastic thin-wall corrugated sheet in sensor or temperature controller is 0.05-0.1mm, which is difficult to solve by traditional welding methods. TIG welding is easy to penetrate, plasma stability is poor, and there are many influencing factors. However, laser welding has a good effect and is widely used.
5. Biomedical Science
Laser welding of biological tissues began in the 1970s. The successful welding of fallopian tubes and blood vessels with laser and its advantages have made more researchers try to weld various biological tissues and popularize it to the welding of other tissues. The research on laser welding nerves at home and abroad mainly focuses on the laser wavelength, dose, function recovery and the selection of laser solder. Based on the basic research of laser welding small blood vessels and skin, the welding of rat common bile duct is also studied. Compared with the traditional suture method, laser welding has the advantages of fast anastomosis speed, no foreign body reaction in the healing process, maintaining the mechanical properties of the welding site, and the repaired tissue grows according to its original biomechanical properties. It will be more widely used in biomedicine in the future.
6. Other Areas
In other industries, laser welding is also gradually increasing, especially in the welding of special materials. Many studies have been carried out in China, such as laser welding of BT20 titanium alloy, hel30 alloy and Li ion battery. Germany has developed a new laser welding technology for flat glass.
Laser welding machine has high production efficiency, stable and reliable processing quality, good economic and social benefits. Laser welding machine is one of the important aspects of the application of laser material processing technology. The welding process belongs to heat conduction type, that is, the laser radiation heats the workpiece surface, the surface heat is guided to the internal diffusion through heat transfer, and the workpiece is melted to form a specific molten pool by controlling the parameters such as laser pulse width, energy, peak power and repetition frequency. Because of its unique advantages, it has been successfully applied to the precision welding of micro and small parts.
