The working principle of the laser welding

Laser welding is a laser beam having excellent directivity, high brightness, high strength, high color, high coherence characteristics radiation to the region of the surface of the workpiece, the laser beam through the optical system is focused, the power of the laser focus density 104-107W/cm2, through the interaction of the laser with the object to be welded, within a very short time so that the weld is formed at a highly concentrated heat source zone, thermal energy after melting the welding region of cooling and crystallization form a solid solder joints and welds. There are two types, depending on the laser and its work, laser welding, a pulsed laser welding, mainly for single point fixed continuous welding and workbook materials, welding, forming a circular solder joint; Another continuous laser welding, mainly used for welding and cutting of thick pieces, forming a continuous weld during the welding process. Generally speaking, the choice of the Welding Material, laser welding machine, the selection, the selection of the machining table, is the main factor of the effect of laser welding. Melting phenomenon and for the welding process can produce and the strength of the generated degree depends mainly on the time, the power density of the surface of the material of the laser action and peak power, good control of each of the above parameters can be the use of laser for a variety of Welding Consumables processing. In laser welding, the beam focus position is one of the most critical control of process parameters, under certain laser power and welding speed, and only the focus is within the scope of the best location in order to obtain the maximum depth of penetration and good weld shape.