1.Automatic TIG (Plasma) Longitudinal Seam Welding Machine is mainly used for the high quality and low distortion automatic longitudinal welding of the metallic cylinders and aligned plates made with stainless steel, iron, aluminum and brass, etc; 2.Adopted keyboard type copper pressing mechanism, to get the regular and stable clamping and cooling effect; 3.Special designed back protective copper block and molding slot, to assure the stable gas shield and achieve double side forming in single side welding; 4.Machine can adopt PLC or Relay integrated control as requirement; 5.Torch moving driven by DC motor , welding speed stepless adjustable;. 6.Apply to cooperate welding with TIG, MIG, MAG and Plasma-Arc welding source.