The machine is horizontal double head, fixed at one end and adjustable in the range of height 300-1800mm. The guide part adopts ball linear guideway, which is flexible in operation and high in precision. The control system adopts microcomputer closed-loop constant current controller. Multi-stage discharge, greatly improving the stability of welding; manual up and down the workpiece, the welding energy from the two independent transformer supply two welding head, stepless adjustable welding energy, pneumatic system at the same time pressure, grouping independent welding forming to meet the workpiece welding production And quality requirements.