Positioning and welding device for crane boom of tower crane

The invention provides a tower crane cargo boom positioning and welding device, and mainly relates to the field of cargo boom positioning and welding equipment. A tower crane cargo boom positioning and welding device comprises a workbench, a first guide rail is installed on one side of the workbench, a transmission base with a power device is installed on the first guide rail in a sliding mode, an L-shaped plate is installed on the top face of the transmission base, a welding gun is installed on the bottom face of one end of the L-shaped plate, and a limiting device is installed on one side of the transmission base. Two second guide rails distributed front and back are installed on the top face of the workbench, and a containing table with a power device is installed on the second guide rails in a sliding mode. The lifting arm welding device has the beneficial effects that the structure is simple, use is convenient, through cooperation of the hydraulic telescopic rod and the connecting plate, the lifting arm