Laser welding technology is a high-tech, because of its unique characteristics, particularly suitable for use in the sensor seal Welding Electrode current sensor manufacturers abroad, many producers are using laser welding process to produce sensor, while domestic manufacturers are not using this technology more, mainly by the production of military products, manufacturers and part of the sensor research institutions in the use of such technology, and using more foreign laser welding machine. At present, the performance of laser welding machines and foreign products have been far off, fully capable of sensor technology requirements of domestic production, but the price is similar foreign products 1/3-1/5. To improve the overall level of internal sensors and the development of national industry, laser, sensor manufacturers in China should be made as soon as possible the use of laser welding machine to the production and processing sensor, in order to increase product competitiveness, international markets.
Welding technology with the copper and iron smelting and other metal production, the emergence of various applications of heat. Ancient methods is to cast welding welding, brazing, forge welding, riveting and welding. Chinese Shang Dynasty bronze ax blade made of iron, copper, cast iron and is welded parts, the surface of copper and iron fusion line meandering twists and turns, good bonding. Spring and Autumn period tomb built in the drum seat has many copper dragon is made of sub-brazing. After analysis, the use of modern soft solder composition is similar. Manufacture of the Warring States period swords, blades of steel, the knife blade is wrought iron, usually made after a plus hot forging welding. According to Ming Sung book "Heavenly Creations" recorded in the book: Ancient China with copper and iron into the furnace heating, the manufacture of forged knives, ax; Wong or sieve with a fine spread at the interface of aging on the wall of the soil, sub- large section of Welding Electrode anchor. Middle Ages, in Damascus, Syria has made weapons with forge welding. Ancient long-term stay in the cast welding technology welding, forge welding, brazing and welding of the level, the use of heat is the fire, the temperature is low, energy is not concentrated, not for large cross-section, long seam welding parts, only can be used to make decorations, simple tools, living equipment and weapons. Early 19th century, Britain's Davis found that two kinds of arc and oxyacetylene flame can heat the local high-temperature molten metal; 1885 - 1887, Russia's other Naerduosi invented the carbon arc pole clamp; appeared in 1900 aluminum heat welding. Early 20th century, carbon arc welding and gas welding very applied, and also appeared thin coated electrodes arc welding, arc relatively stable weld pool protected by the slag, welding quality is improved, the manual metal arc welding into the practical stage, arc welding from the 1920s became an important welding method. Has become the beginning of the development of modern welding technology. During this period, the United States the use of arc voltage control electrode Noble gave speed automatic arc welding machine made, making welding mechanization and automation of the start. Ivanov 1930, American Robin invention using the submerged arc welding wire and flux, welding mechanization has been further developed. 40 years, to meet the aluminum, magnesium alloy and alloy steel welding needs, and tungsten inert gas welding melt one after another. 1951 Barton Welding Institute of the Soviet Union to create electroslag welding, a large thickness of the workpiece and efficient welding. In 1953, the Soviet Union Liu Buff Chomsky, who invented the carbon dioxide gas shielded arc welding, gas shielded arc welding to promote the use and development, such as the emergence of a mixed gas arc welding, flux-cored arc welding and gas residue from the co-shielded arc welding and so on. Gage 1957, the United States invented plasma arc welding; 40 years in Germany and France, invented the electron beam welding, but also practical and 50's has been further developed; 60 years appeared laser welding, plasma, electron beam and laser welding methods appear to mark a high energy density welding of new development, greatly improved the weldability of materials, many difficult to use other methods of welding materials and structures to be welded. Other welding techniques as well in 1887, the United States, Thompson invented the resistance Nickel Welding Electrodes and spot welding and seam for sheet metal welding; seam welding is a bonding in the first semi-mechanized welding methods, with the seam welding process carried out by two parts Push the wheel forward; the twentieth century, the 1920s began to use the method of flash butt welding rods and chains. At this point resistance welding into the practical stage. In 1956, the United States, Jones invented the ultrasonic welding; the Soviet Union Hill season Cove invention friction welding; 1959, Stanford Research Institute United States successfully explosion welding; the late 1950s the Soviet Union has made a vacuum diffusion bonding equipment.