1. Repair the weld surface: the weld formed during welding is uneven. Milling the weld with a milling machine can trim the weld surface to a flat state, which is more beautiful and meets the requirements.
2. Improve the weld quality: After welding, the weld quality has an important influence on the strength and stability of the whole welded structure. By milling the weld with a milling machine, the defects and blowholes produced in the welding process can be eliminated, and the quality and reliability of the weld can be improved.