SUMMARY
7
DC Pulse TIG
AC MMA
AC TIG
AC Pulse TIG
1.For DC MMA, polarity connection can be chosen according to different electrodes
，
please refer
to §3.5
；
2.For AC MMA, magnetic flow caused by invariable DC polarity can be avoided
；
3.For DC TIG, DCEP is used normally (workpiece connected to positive polarity, while torch
connected to negative polarity). This connection has many characters, such as stable welding arc,
low tungsten pole loss, more welding current, narrow and deep weld;
4.For AC TIG (rectangle wave), arc is more stable than Sine AC TIG. At the same time, you can
not only obtain the max penetration and the min tungsten pole loss, but also obtain better clearance
effect.
5.DC Pulsed TIG has the following characters: 1) Pulse heating. Metal in Molten pool has short
time on high temperature status and freezes quickly, which can reduce the possibility to produce hot
crack of the materials with thermal sensitivity. 2) The workpiece gets little heat. Arc energy is
focused. Be suitable for thin sheet and super thin sheet welding. 3) Exactly control heat input and
the size of the molten pool. The depth of penetration is even. Be suitable for welding by one side
and forming by two sides and all position welding for pipe. 4) High frequency arc can make metal
for microlite fabric, eliminate blowhole and improve the mechanical performance of the joint. 5)
High frequency arc is suitable for high welding speed to improve the productivity.
TIG200E AC/DC -series welding machine is suitable for all positions welding for various plates
made of stainless steel, carbon steel, alloyed steel, titanium, aluminium, magnesium, cuprum, etc, which
is also applied to pipe installment, mould mend, petrochemical, architecture decoration, car repair,
bicycle, handicraft and common manufacture.
MMA——Manual Metal Arc welding;
PWM——Pulse-Width Modulation;
