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What is the laser welding technology?

by:J&D WATER     2020-03-31
Laser welding is the use of laser radiation energy to realize the effective welding technology, its working principle is: through the specific way to motivate active laser medium ( Such as CO2 and other gases mixed gas, YAG yttrium aluminum garnet crystals, etc. ) , make its reciprocating oscillation in the cavity, thus forming a stimulated radiation beam, when the beam is in contact with the workpiece, the energy absorbed by the workpiece, when it in the temperature of the material melting point welding can be carried out. Deep penetration laser welding can be divided into heat conduction welding and, the former heat through heat transfer to the workpiece internal diffusion, only in the weld surface melting phenomenon, workpiece internal not penetration, basically do not produce vaporization phenomenon, more used in the welding of thin-wall materials at low speed; Which not only fully fusion materials, but also make the material vaporized, forming a large number of plasma, due to large heat, keyhole molten pool front end there will be a phenomenon. Deep penetration can thoroughly through welding workpiece, and the input energy is big, the welding speed, is currently widely used laser welding mode. Laser welding advantages (1) the benefits of using laser welding can obtain high quality joint strength and larger than wide, deep and welding speed is faster. (2) due to the laser welding without vacuum environment, so through the lens and optical fiber, can realize remote control and automatic production. (3) laser has the ability of large power density, difficult welding materials such as titanium, quartz has good welding effect, and can be applied to different performance materials welding. (4) the micro welding can be performed. After focusing the laser beam can be obtained very small spot, and can accurate location, can be applied to large quantities of automation in the compound of micro and small size workpieces. Laser welding defects (1) laser and various parts of the welding system prices more expensive, so the initial investment and maintenance costs than traditional welder 'ecomax', poor economic benefit. (2) due to the low the absorptance of laser is solid material, in particular, in the wake of a plasma Plasma in laser has absorption effect) The conversion efficiency of laser welding, and therefore is generally low, Usually a 5% ~ 30%) 。 (3) due to the smaller focused light spot of laser welding, the workpiece joint gear precision demand is higher, a small deviation can produce larger equipment processing error. Laser welding is bad for people? Laser welding machine from the invisibility and the energy is too high, non-professional personnel don't go to contact laser source, otherwise is dangerous. Laser also belong to the electromagnetic wave, but the welding machine with laser wavelength are big, so there is no such as uv wavelength of light radiation hazards. During the welding process can produce many gas, but is mostly inert gas, no toxicity, but also depends on different welding materials, completes the protective measures, reduce the gas suction. Laser welding machine sent almost no radiation hazard, but during the welding process will be ionizing radiation and stimulated radiation, away from the weld in the welding process. There is no lack of to the radiation induced the shortwave, and to the eyes, and had a significant impact on the body, away from the solder joints. Close of homework to do protective measures such as wear respiratory protective devices, radiation protection clothing, with an eye mask. Metal laser welding equipment recommendation: preferential deals offer 4007001618 【 Metal laser welding equipment 】 Suitable for all kinds of complex welding, the welding of different equipment and 1 mm thick seam welding; Multi-channel fiber optic mode, welding transfer at the same time; 【 Mould laser welding equipment 】 Applicable mould industrialized, used for precision mold repair, such as digital products, mobile phones, toys, automobile, motorcycle, mold and other mold manufacturing and molding industry. 【 Gold and silver jewelry laser welding 】 Mainly used in jewelry, such as electronics, communications, handicrafts and other industries; 【 Large laser welding 】 Application in automobile body covering parts of compound, such as car door, side wai, window, floor, warehouse, the warehouse before, trunk lid. More metal laser welding metal laser welding welding equipment
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