Abstract:In order to solve the problems of difficult manual positioning, misalignment and low efficiency, an automatic welding production equipment for the loadbearing frame was designed. It was mainly composed of automatic loading and unloading device, fixed plate welding station, frame welding station, bottom palm welding station and conveying line. The large frame was placed on the conveying line automatically by the automatic loading and unloading device, and the fixed plate was welded at the first welding station. The conveyor belt conveyed the workpiece to the second welding station, the two ears were welded automatically, then bottom palm was welded at the third welding station, finally the whole process was completed. The equipment was built to verify the feasibility in practice, the detailed experimental data were proposed. The number of employees has been reduced from 5 to 1, and the production tact has been reduced from 60 s/piece to 10 s/piece, and the defective rate has dropped significantly from 21‰ to 3‰. The technical indicators are good.