Top roller welding machine

The utility model provides a top roller welding machine. The top roller welding machine comprises a rack and further comprises a conveying assembly, a clamping assembly, a welding assembly and a control system which are arranged on the rack, wherein the conveying assembly comprises a conveyance belt and a conveyance air cylinder, the conveyance belt is used for conveying workpieces to a position of the clamping assembly, and the conveyance air cylinder is used for driving the conveyance belt to convey; the clamping assembly comprises two clamping rods, a clamping air cylinder and a rotating air cylinder, the two clamping rods are used for clamping the workpieces, the clamping air cylinder is used for driving the two clamping rods to move in opposite directions to clamp the workpieces, and the rotating air cylinder is used for driving the clamping rods to rotate; the welding assembly comprises a welding gun and a welding air cylinder, and the welding air cylinder is used for driving the welding gun to move towards a welding position; the control system controls the working time sequence of the conveyance air cylinder, the clamping air cylinder, the rotating air cylinder, the welding air cylinder and the welding gun. According to the mutual matching of the conveying assembly, the clamping assembly and the welding assembly, a function of automatically welding a top roller can be achieved; the structure is simple, and meanwhile, the production efficiency is high.