Aluminum alloy materials are difficult to fully weld, but they are commonly used in industrial products. Therefore, the welding of aluminum alloy materials has always been a challenge that laser welding machine manufacturers should suddenly encounter.

TIG welding or MIG welding technology is usually used for traditional aluminum alloy welding, but the main problem is that the heat input during the welding process causes large deformation of the aluminum alloy, slow welding speed, and low production efficiency. With the increase of welding deformation, subsequent correction work often wastes a lot of time, increases manufacturing costs, and affects production efficiency and quality.

Laser welding has the characteristics of high power density, low welding heat input, small welding heat affected area, and small welding deformation, and is particularly valued in the field of aluminum alloy welding. However, compared to commonly used materials such as stainless steel, aluminum alloy laser welding still faces several difficulties, mainly reflected in:

1. During the welding process, aluminum alloys are prone to gas pores and thermal cracks.



2. The high initial reflectivity and high thermal conductivity of aluminum alloys towards laser beams make it difficult to induce "small holes" due to the low absorption rate of aluminum alloys towards laser before melting.



3. The burning loss of alloy elements during the welding process reduces the mechanical properties of aluminum alloy welded joints.



4. The ionization energy of aluminum is low, and the photoinduced plasma is easy to process and diffuse in the welding process, resulting in poor welding stability.



Because laser welding machine manufacturers want to gain a share in the application of aluminum alloy materials, how to solve these difficulties is in front of them.