Laser welding is the use of laser pulse to heat a small area of the material. The energy of the laser radiation is diffused through thermal conduction into the material, which is melted to form a specific molten pool. Laser welding is a new welding method, mainly used for welding thin-wall materials and precision parts, can realize spot welding, butt welding, lap welding, sealing welding and so on. It has the advantages of high thickness ratio, small weld width, small heat affected zone, small deformation, fast welding speed, smooth and beautiful weld, no need or simple treatment after welding, high weld quality, no porosity, accurate control and so on.

The reason why handheld laser welding machine adopts argon arc welding is based on the principle of ordinary arc welding. Argon gas is used to protect metal welding materials, and the welding materials are melted into liquid state on the substrate to be welded through high current to form a molten pool, so that the metal to be welded and the welding materials can achieve metallurgical combination. Due to the constant supply of argon gas during high-temperature melting welding, the welding material does not come into contact with oxygen in the air, thus preventing the welding material from being oxidized.

Auxiliary gas is an indispensable process in laser welding. On the one hand to prevent metal material sputtering pollution focusing mirror; On the other hand, it is to prevent the plasma generated in the welding process from focusing too much and prevent the laser from reaching the surface of the material. Laser welding In welding engineering, helium, argon, nitrogen and other gases are often used to protect the molten pool from oxidation. The type of protective gas, the size of gas flow, blowing Angle and other factors have a great impact on the welding results, and different blowing methods will also have an impact on the welding quality.

As a new welding technology, laser welding has the characteristics of high energy density, fast speed, high precision, deep penetration and strong adaptability. Its application is more and more extensive, can not only improve the production efficiency, but also improve the quality of welding. Laser welding technology will certainly play a more important role in the field of material processing.