Laser welding process can be divided into the following steps:
1. A laser beam generated by the laser source is focused on the surface of the material to be welded through a lens and a laser welding gun, forming a small light spot.
2. The light spot creates a strong thermal effect on the material surface, causing it to rapidly heat up to its melting point and form a liquid or gaseous molten pool.
3. The laser beam moves along a predetermined path, causing the molten pool to extend in the direction of the weld seam. At the same time, due to surface tension, adjacent materials flow into the molten pool, filling any gaps.
4. After the laser beam moves away, the molten pool cools and solidifies quickly, forming a uniform, dense, and high-strength weld seam.
In summary, laser welding uses a high-intensity laser beam to melt and fuse materials together.