Welding device for tank body machining

The utility model relates to the technical field of tank body processing, and discloses a welding device for tank body processing, which comprises a base and a frame, two wheel grooves are formed in the front surface of the base, supports are fixedly connected to two sides of the top of the base, a top frame is fixedly connected to the top of each support, and a limiting groove is formed in the middle of the bottom end of each top frame. A first motor is fixedly installed at the top of the outer side of one support, and a second air cylinder is fixedly installed in the middle of the outer sideof one support. According to the welding device for tank body machining, a loaded tank body is moved to the position below the welding mechanism through the moving frame, the shear fork type hydraulic lifting mechanism is started to lift the tank body to a specific height, and therefore a second air cylinder and a third air cylinder are started to drive a left clamping plate and a right clampingplate to move relatively,