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Laser welding technology application - Since the laser fusion welding

by:J&D WATER     2020-03-22
Automobile manufacturing process, the laser technology is mainly used for automobile body range of thick plate welding, welding body welding and auto parts. Laser welding used in automobile, can reduce body weight and achieve the purpose of fuel economy; Improve the assembly precision of the body, 30% increase the stiffness of the body so as to improve the safety of the body; Reduce automobile body manufacturing process of stamping and assembly costs, reduce the number of body parts and improve the body integration. Laser welding technology and application of 1. Since the laser fusion welding laser welding, the welding of the two parts or more its melting and finally cooling condenses into an organic whole, the welding method does not need to add auxiliary flux or packing, fully USES the material of workpiece weld together. When the laser power density light irradiation to the workpiece surface reaches more than 106 w/cm2, the workpiece under the irradiation of laser rapid heating, its surface temperature rise in a very short time to the boiling point, make the metal melting and vaporization. In the liquid metal to form a slender hole filled with metal vapour. When the recoil of metal vapor pressure and liquid metal surface tension and gravity balance, holes are no longer continue to deepen, forming a depth and stable hole, hole is around the weld molten pool, small hole with laser, closed pores and formation of weld, the realization of deep penetration laser welding. Schematic diagram is shown in figure 1: in the manufacture of car body, use laser welding technology, can improve the flexibility of product design, reduce the manufacturing cost, the increase of the stiffness in the body, improve the competitiveness of the products. Laser welding welding speed faster, so the weld heat affected zone compared with other welding method is small, almost no welding deformation. Which can greatly improve the structure of the body and the matching unit, gate lid size and side surround the pingdu and sealing effect, windshield and the wind window matching and sealing, as well as the realization of a multilayer high quality connection, achieve high body strength. In addition, because the modern automotive body with high strength steel, galvanized steel or high quality if adopt the traditional spot welding technology, as a result of three layer plate and galvanized the large welding current and welding pressure, the result will inevitably led to the decrease of the quality of the solder and solder joint deformation is serious, leading to the assembly quality decline. Now feasible is connected by intermediate frequency spot welding technology and laser fusion welding technology. In terms of spot welding itself, the strength of the solder joint can be very high, but not part of the solder joint or intermittent separation, in terms of overall body strength than welding into one of the lower strength of laser welded joint. Spot welding of discontinuity and its own characteristics: such as solder joint easy to deformation, especially in the three layer board welding connection, high strength steel of galvanized sheet connection and connection, the welding deformation is bigger, results in the decrease of solder joints of smoothness and cracks, and spot welding welding point would be the parent metal around the heat affected zone strength drops, vehicles have been badly hit is often at the fracture site. 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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