Automatic feeding device for non-penetration welding of automobile fuel tank

The invention discloses an automatic feeding device for non-penetration welding of an automobile fuel tank, and belongs to the technical field of welding equipment. The automatic feeding device comprises a ball screw pair arranged on a working platform, weldment profiling guide grooves are respectively formed in the two sides of the ball screw pair, a sliding plate sliding along a screw rod of the ball screw pair is arranged on the ball screw pair, and a shifting cylinder is arranged on the sliding plate; a shifting fork for pushing a to-be-welded part is arranged at the end of a piston rod of the shifting cylinder; sliding blocks driven by feeding cylinders are arranged at the discharging ends of the weldment profiling guide grooves, weldment profiling clamping jaws driven by clamping jaw cylinders are arranged on the sliding blocks, and one side of each weldment profiling clamping jaw is connected with a detection cylinder; and the detection cylinders are provided with material level detection switches whic