Laser welding machine can be mainly used in manufacturing, powder metallurgy, automotive industry, electronics industry and biological sciences.
Laser tailor welding technology has been widely used in foreign car manufacturing. According to statistics, in 2000, there were more than 100 laser tailor welding production lines for cutting blank slabs worldwide, with an annual output of 70 million blank welding slabs for passenger car components, and it continues to grow at a higher rate . Introduced domestic production models also use some tailored blank slab structures. Japan uses CO2 laser welding instead of flash butt welding to connect rolled steel coils in the steel industry. Research on ultra-thin plate welding, such as foils with a thickness of 100 microns or less, cannot be welded, but through YAG with a special output power waveform The success of laser welding shows the broad future of laser welding. Japan is also the first in the world to successfully develop YAG laser welding for the repair of thin tubes in steam generators in nuclear reactors. It also carries out gear laser welding technology in China.
With the continuous development of science and technology, many industrial technologies have special requirements for materials, and materials manufactured by smelting methods can no longer meet the needs. Due to the special performance and manufacturing advantages of powder metallurgy materials, traditional metallurgical materials are being replaced in some fields such as automotive, aircraft, tool and cutting tool manufacturing. With the increasing development of powder metallurgy materials, the problem of its connection with other parts It is increasingly prominent, which limits the application of powder metallurgy materials. In the early 1980s, laser welding entered the field of powder metallurgy materials processing with its unique advantages, opening up new prospects for the application of powder metallurgy materials, such as welding diamond using the brazing method commonly used in powder metallurgy material connection. Low strength, wide heat-affected zone, especially inability to adapt to high temperatures and high strength requirements that cause the solder to melt and fall off. Laser welding can improve welding strength and high temperature resistance.
In the late 1980s, kilowatt-level lasers were successfully used in industrial production, and today laser welding production lines have appeared in the automotive industry on a large scale, becoming one of the outstanding achievements of the automotive industry. European automobile manufacturers took the lead in laser welding of sheet metal welding such as roof, body, and side frames as early as the 1980s. In the 1990s, the United States actually introduced laser welding into automobile manufacturing. Although it started late, it developed rapidly. Italy uses laser welding in the welding and assembly of most steel plate components. Japan uses laser welding and cutting processes in the manufacture of body cover parts. High-strength steel laser welding assemblies are increasingly used in automobile body manufacturing due to their excellent performance. More and more, according to the statistics of the US metal market, by the end of 2002, the consumption of laser welded steel structures will reach 70,000 tons, which is three times that of 1998. According to the characteristics of large volume and high degree of automation in the automotive industry, laser welding equipment is developing towards high power and multi-path. In terms of technology, the Sandia National Laboratory of the United States and PrattWitney have jointly researched the addition of powder metal and wire in the laser welding process, and the Institute of Applied Beam Technology of Bremen, Germany has conducted a lot of research on the use of laser welding of aluminum alloy body frames It is believed that the addition of fillers in the weld seams will help eliminate thermal cracks, increase welding speed, and solve tolerance problems. The developed production line has been put into production in the factory.
Laser welding has been widely used in the electronics industry, especially in the microelectronics industry. Because laser welding has a small heat-affected zone, rapid heating concentration, and low thermal stress, it has shown unique advantages in the packaging of integrated circuit and semiconductor device housings. Laser welding has also been applied in the development of vacuum devices, such as Molybdenum focus pole and stainless steel support ring, fast hot cathode filament assembly, etc. The thickness of the elastic thin-wall corrugated sheet in the sensor or temperature controller is 0.05-0.1mm, which is difficult to solve by traditional welding methods, TIG welding is easy to weld through, and the plasma stability is poor. There are many influencing factors, and laser welding has a good effect and is widely used. Applications.
Laser welding of biological tissues began in the 1970s. The successful welding of laser tubes and blood vessels and their superiority have shown that more researchers have attempted to weld various biological tissues and promoted welding to other tissues. The domestic and foreign researches on laser welding nerves are mainly focused on the laser wavelength, dose and its function recovery and laser solder selection. Liu Tongjun conducted basic research on laser welding of small blood vessels and skin. The common bile duct of rats was welded. Compared with the traditional suture method, the laser welding method has the advantages of fast anastomosis, no foreign body reaction during the healing process, maintaining the mechanical properties of the welded part, and the advantages of the repaired tissue growing according to its original biomechanical characteristics. Get more widely used.
In other industries, laser welding has also gradually increased, especially in special materials welding. A lot of research has been done in China, such as laser welding of BT20 titanium alloy, HEl30 alloy, Li-ion battery, etc. Germany has developed a type of New laser welding technology.