Introduction: Laser welding is the use of high-energy laser pulses to locally heat the material in a tiny area. The energy of the laser radiation diffuses into the interior of the material through thermal conduction, melting the material to form a specific molten pool. It is a new type of welding method. It is mainly used for the welding of thin-walled materials and precision parts. It can realize spot welding, butt welding, overlap welding and sealing welding. It has a high aspect ratio, a small weld width, and a small heat affected zone. The deformation is small, the welding speed is fast, the weld seam is smooth and beautiful, and no treatment or simple treatment is needed after welding. The welding seam has high quality, no porosity, can be accurately controlled, and the focused spot is small, positioning accuracy is high, and automation is easy.
Laser welding uses high-energy laser pulses to locally heat the material in a tiny area. The energy of the laser radiation diffuses into the material through heat conduction, melting the material to form a specific molten pool. It is a new type of welding method. It is mainly used for the welding of thin-walled materials and precision parts. It can realize spot welding, butt welding, overlap welding and sealing welding. It has a high aspect ratio, a small weld width, and a small heat affected zone. The deformation is small, the welding speed is fast, the weld seam is smooth and beautiful, and no treatment or simple treatment is needed after welding. The welding seam has high quality, no porosity, can be accurately controlled, and the focused spot is small, positioning accuracy is high, and automation is easy.
Laser welding has the following advantages over traditional welding processes:
1, no contact processing, no external force on the welding parts.
2, laser energy is highly concentrated, the heat effect is small, thermal deformation is small.
3, can weld high melting point, refractory, difficult to weld metal, such as titanium alloys, aluminum alloys and so on. Can achieve welding between some dissimilar materials.
4. The welding process has no pollution to the environment and can be welded directly in the air. The process is simple.
5, small solder joints, narrow welds, neat and beautiful, no need to deal with after welding or just a simple process. Welds have uniform structure, fewer pores, and fewer defects, which can reduce and optimize the mother material. The mechanical strength of the weld is often higher than the mechanical strength of the parent material. Laser welding is superior to conventional welding methods in terms of mechanical properties, corrosion resistance and electromagnetic properties.
6, the laser can be precisely controlled, focused spot is small, high-precision positioning, precision machining.
7, easy to work with computer numerical control systems or robots, robots, automatic welding, improve production efficiency.
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