Welding is based on the instantaneous high-energy thermal processing on the metal workpiece, so that the local instant reaches the melting point, so that the two workpieces are instantly melted and combined.
Laser soldering eliminates the need for solder, flux and post-process bead processing, making process processing simpler and less expensive.
The welding material is also not limited, and it can also be made of two different materials. Compared with traditional welding, laser welding has higher precision, high precision, small welds, small workpiece deformation, easy processing of thin workpieces, and easier and automatic integration.

Arm welding as following :