Fixed-position welding device for hinge shaft of engineering telescopic cylinder barrel

The invention provides a fixed-position welding device for a hinge shaft of an engineering telescopic cylinder barrel. According to the fixed-position welding device, a guide rail is erected on a bottom plate, V-shaped support blocks are erected on the guide rail, a hinge shaft location seat assembly is arranged at one V-shaped support block, the hinge shaft location seat assembly comprises a frame, a power hold-down device is arranged at the top of the frame, and a location sleeve I is arranged on a press head of the power hold-down device in a manner of extending downwards; and a location sleeve II is correspondingly arranged at the bottom of the frame. The fixed-position welding device provided by the invention is capable of realizing the functions of direct location, butt joint and welding forming for the hinge shaft of the telescopic cylinder barrel through the simple, practical and flexible operation performance; and meanwhile, the fixed-position welding device is capable of effectively ensuring the loc