The most basic characteristics are: monochromatic, directional and relevance, the exclusive nature of these plus the resulting ultra-high brightness, ultrashort pulses and other properties and it has been closely combined with contemporary business, these qualities quite suitable for welding process. Lasers generate laser usually work by diverse substances classified, primarily semiconductors (GaAs, InP, etc.) laser, solid (Nd: YAG, etc.) laser, gas (CO2, He-Ne, etc.) laser, liquid (tunable dye, etc.) lasers, chemical lasers, totally free electron lasers. 1 gas to gas or metal vapor lasers as light particles, it is the most diversified, most diverse incentives, the widest distribution location of laser wavelength, straightforward to achieve a continuous output power, 1 of the most widely utilized class of laser. Solid-state lasers is to produce laser particle doped in the solid matrix, the concentration ratio of gas, for that reason the access to relatively big laser energy output, with high energy, high-peak power, compact and durable and so on. In laser welding primarily on the use of two lasers by stimulated substances.
Laser welding applications in the manufacture of steady growth, from pulse to continuous, from tiny power to power, from the thin to thick pieces, from simple to complex shapes single slit, laser welding in the continuing evolution has been gradual turn out to be a mature contemporary processing technologies. Laser welding and laser welding into a continuous laser welding, continuous welding can be divided into heat conduction welding and deep penetration welding. With the enhance of laser output power, in certain the emergence of high power CO2 laser, laser deep penetration at home and abroad have been in rapid development, the largest welding aspect ratio has reached 12:1, laser Welding materials Also from the general to the development of low carbon steel welding galvanized sheet today, aluminum, titanium, copper and ceramic supplies, laser welding speed has reached tens of meters per minute, laser welding technology turn out to be far more sophisticated, and applied to the production line , in the automobile production line, such as Gear Welding, automotive floor and structural parts (such as door body) and high-speed welding and has achieved tremendous economic and social advantages.