Perpendicular to the external characteristics of power DC positive polarity (negative) Welding Wire connectedGenerally suitable for below 6mm sheet welding, weld appearance, welding deformation characteristicsThe protective gas argon, a purity of 99.99%. When the welding current of 50 ~ 50A argon flow 8 ~ 0L/min, and when current 50 ~ 250A, argon flow rate of 2 ~ 5L/min.(4) tungsten inert gas nozzle prominent length, 4 ~ 5mm better, shelter in the fillet welds and other poor places is 2 ~ 3mm, slotted deep is 5 ~ 6mm nozzle to work distance is generally not more than 5mm.5 in order to prevent welding stomatal welding parts subject to rust, oil, etc. to be cleaned up.The welding arc length, welding ordinary steel, 2 ~ 4mm is better, welded stainless steel, to ~ 3mm is better, too long the protection ineffective.7 docking base, in order to prevent the back of the bottom of the weld from oxidation, and the back of the need to implement the gas protection.Argon to protect the weld pool, and to facilitate the welding operation, the tungsten centerline weld workpiece generally should be kept 80 to 85 ° angle, filler Welding Wires and the workpiece surface angle should be as small as possible. is generally about 0 °.9 wind and ventilation. The wind, you take the backstop measures, appropriate ventilation measures should be taken indoors.