1. For lasers, what is a high-reflection material?
1. Judging by resistivity: the lower the resistivity of the material, the lower the absorption rate of the laser, and the higher the reflection of the material to the laser;
(High reflection: copper＞aluminum＞iron)
2. Judging by the surface structure: the smoother the surface of the material, the lower the absorption rate of the laser, and the higher the reflection of the material to the laser;
(Mirror stainless steel is also a highly reflective material for laser processing)
Operating specifications and precautions for laser welding of high-reflection materials (aluminum alloy)
1. Aluminum alloy has low laser absorption rate and high thermal conductivity. So. it is necessary to ensure the best beam focus position in the actual aluminum alloy welding processï¼›
Adjust the copper nozzle scale tube. and adjust the welding to the laser focus position (the strongest laser energy position)
2. The reflectivity of the aluminum surface to the laser is about 80%. It is strictly forbidden to weld the welding head perpendicular to the aluminum alloy surface, otherwise most of the laser will be reflected back to the welding head and laser, which will slightly damage the welding head lens and directly burn the laser light source.ï¼›
Aluminum alloy materials contain magnesium, zinc, manganese and other elements, and a large amount of spatter is generated during welding. It is strictly forbidden to weld the welding head perpendicular to the aluminum alloy surface, otherwise most of the welding spatter will directly enter the welding head and cause damage to the lens.ï¼›
The welding head and the aluminum alloy surface are welded at an angle of 50°~70°
3. When welding the welding head with the inclined part of the aluminum alloy surface, it is strictly forbidden to place people and flammable materials on the opposite side of the welding station, and the welding operator must wear protective eyes during the whole process.
Post time: Jan-06-2022
