Welding device for machining parts of shield tunneling machine

The utility model provides a welding device for machining parts of a shield tunneling machine. The welding device for shield tunneling machine part machining comprises a welding robot and a supporting mechanism. The supporting mechanism comprises a clamp arranged below the welding robot, a workpiece is clamped in the clamp, two supporting tables are arranged below the clamp, two supporting plates are installed on the supporting tables, clamping assemblies are arranged on the supporting plates, the clamp is clamped on the corresponding supporting plates through the clamping assemblies, and the workpiece is clamped on the clamping assemblies through the clamping assemblies. And an overturning assembly is arranged below the supporting plate. According to the welding device for machining the parts of the shield tunneling machine, the welding robot, the clamp, the supporting table, the supporting plate, the overturning assembly and the clamping assembly are arranged, a workpiece clamped in the clamp can be turned