Features: 1) Adjustable stroke cylinders for compression to avoid collision and damage of upper and lower electrodes 2) Speed adjustment is convenient and stable 3) Longitudinal and horizontal welding is suitable for welding different parts 4) Smart and reasonable internal structure reduces welding performance weakness due to heat damage 5) Rotation conductance for the sliver axis tile provides excellent contact and reduces electric energy transformation 6) Widely used in hardware, household appliance, automobile, basin making and other metal manufacturing industries