Precision parts welding laser welding is the use of high-power coherent monochromatic photon focusing on the laser beam from the heat source for welding. This welding method usually has continuous power laser welding and pulsed power laser welding. The advantage of laser welding is that it does not need to be carried out in vacuum. The disadvantage is that penetration is not as strong as electron beam welding.

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Precision parts welding laser welding can be accurate energy control, which can achieve precision micro-device welding. It can be applied to a lot of metal, in particular, can solve some difficult to weld metal and dissimilar metal welding.

Precision parts welding laser production: the material is excited, the resulting wavelength, frequency, direction exactly the same beam.

Precision parts welding laser features: a monochromatic good, good direction, high energy density characteristics, the laser transmission or reflection through the mirror, you can get less than 0.01mm diameter, power density up to 1013W / cm2 energy beam, Can be used as heat source for welding, cutting, drilling and surface treatment. The materials that produce lasers are solid, semiconductors, liquids, gases, etc. Among them, yttrium-aluminum garnet (YAG) solid-state lasers and CO2 gas lasers are used for industrial processing such as welding and cutting.

The main advantages of laser welding of precision parts welding are:

(1) precision parts welding laser can be optical fiber, prism and other optical method of bending transmission, suitable for micro-parts and other welding methods difficult to reach the parts of the welding, but also through the transparent material for welding.

(2) high energy density, can achieve high-speed welding, heat affected zone and welding deformation are very small, especially for heat-sensitive materials, welding.

(3) precision parts welding laser is not affected by the electromagnetic field, does not produce X-ray, no vacuum protection, can be used for large-scale structure of the welding.

(4) can be directly welded insulated conductor, without having to pre-remove the insulation layer; also can be welded with different physical properties of heterogeneous materials.

The main drawback of laser welding of precision parts welding is: expensive equipment, low energy conversion rate (5% ~ 20%), butt welding interface processing, assembly, positioning requirements are high, mainly for the electronics industry and instrumentation industry Of the micro-device welding, and silicon steel, galvanized steel and other welding.