Our life is not monotonous, manufacturing process is constantly updated, the quality of life in the continuous upgrading of the traditional manufacturing process has been unable to meet our daily needs, the Ministry of Science and Technology progress today, the traditional manufacturing process is gradually being laser Welding machine technology to replace.
Laser welding machine in laser welding applications is superior to the traditional process a lot.
1, the field of powder metallurgy
With the continuous development of science and technology, many industrial technology on the special requirements of materials, the use of metallurgical casting method of manufacturing materials can not meet the needs. As the powder metallurgy material has special properties and manufacturing advantages, in some areas such as automotive, aircraft, tool and cutting tool manufacturing industry is to replace the traditional smelting materials, with the increasing development of powder metallurgy, and other parts of the connection problem It is increasingly prominent, so that the application of powder metallurgy materials are limited. In the early eighties, the laser welding with its unique advantages into the field of powder metallurgy materials for the application of powder metallurgy materials opened up new prospects, such as the use of powder metallurgy materials commonly used brazing method of welding the diamond, due to the combination of Low strength, heat affected zone wide, especially can not meet the high temperature and high strength caused by melting solder off, the use of laser welding can improve the welding strength and high temperature performance.
2, manufacturing applications
TailoredBlandLaserWelding technology has been widely used in the manufacture of foreign cars, according to statistics, in 2000, more than 100 pieces of tailored blank slab laser welding lines were produced in the world, with an annual output of 70 million pieces of welding components, To a higher rate of growth. Domestic production of the imported models Passat, Buick, Audi, also used some cut blank board structure. Japan to CO2 laser welding instead of flash butt welding steel rolling steel coil connection, in thin plate welding research, such as the thickness of 100 microns below the foil, can not be welded, but by a special output power waveform YAG laser welding to be successful, showing the broad prospects for laser welding. Japan is also the world's first successful development of the YAG laser welding used in nuclear reactors in the steam generator thin tube repair, etc. in the country Su Baorong also carried out the gear laser welding technology.
3, the electronics industry
Laser welding in the electronics industry, especially in the microelectronics industry has been widely used. As the laser welding heat affected zone small concentration of heat quickly, thermal stress is low, which is integrated circuits and semiconductor device package in the package, showing a unique advantage in the development of vacuum devices, laser welding has also been applied, such as molybdenum Focusing pole and stainless steel support ring, fast hot cathode filament assembly. Sensor or thermostat in the elastic thin-walled corrugated sheet thickness of 0.05-0.1mm, the use of traditional welding methods difficult to solve, TIG welding easy welding, plasma stability is poor, many factors and the use of laser welding is very good, widely Applications.
4, the automotive industry
In the late 1980s, kilowatt-class lasers were successfully used in industrial production, and now laser welding production line has been a large scale in the automotive industry, as the automotive industry one of the outstanding achievements. Germany, Audi, Mercedes-Benz, Volkswagen, Volvo and other European car factory as early as the 20th century, 80 years, the first to use laser welding roof, body, side frame and other sheet metal welding, 90 GM, Ford and Chrysler The introduction of laser welding into the automobile manufacturing, although the late start, but the development of fast. Italy Fiat in the welding of most steel components used in laser welding assembly, Japan's Nissan, Honda and Toyota Motor Company in the manufacture of body panels are used in laser welding and cutting process, high-strength steel laser welding assembly because of its excellent performance The use of the body in the car more and more, according to the US metal market statistics, to the end of 2002, the laser welding steel structure consumption will reach 70000t than in 1998 increased by 3 times. According to the automotive industry, large quantities, high degree of automation of the characteristics of laser welding equipment to high-power, multi-directional direction. In the process of the United States Sandia National Laboratory and PrattWitney joint in the laser welding process to add powder metal and metal wire research, Bremen, Germany Institute of Applied Beam Technology in the use of laser welding aluminum body skeleton carried out a lot of research, It is believed that the addition of fillers in the welds will help to eliminate hot cracks, increase the welding speed and solve the problem of tolerance. The developed production line has been put into production at Mercedes-Benz's factory.
5, biomedical
Laser welding of biological tissue began in the 1970s, Klink et al and jain [13] with laser welding of the successful welding of oviducts and blood vessels and the advantages shown, so that more researchers try to weld a variety of biological tissue, and extended to Welding of other organizations. Laser welding nerve on the current domestic and international research focused on the wavelength of the laser, the dose and its functional recovery and the choice of laser solder and other aspects of research, Liu Tongjun laser welding of small blood vessels and skin and other basic research on the basis of The common bile duct of rats was welded. Laser welding method Compared with the traditional suture method, the laser welding has the advantages of fast speed of anastomosis, no foreign body reaction during the healing process, maintaining the mechanical properties of the welded parts, and the growth of the restorative tissue according to its original biomechanical properties. Get more extensive application.
6, other areas
In other industries, laser welding is gradually increasing, especially in the welding of special materials in China conducted a lot of research, such as BT20 titanium alloy, HEl30 alloy, Li-ion batteries and other laser welding, the German glass machinery manufacturer GlamacoCoswig IFW Technology and Materials Experimental Research Institute to develop a flat glass for laser welding of new technologies.