STEALTH DIGI-TIG 180 DC PULSE PFC MV
2 SUMMARY
2.1 Brief Introduction
The TIG DC PULSE PFC MV welding machine features the latest Pulse Width
Modulation (PWM) technology and Insulated Gate Bipolar Transistor (IGBT) power
module, which can change work frequency to medium frequency so as to replace the
traditional large transformer with a medium frequency transformer – making it smaller,
portable light- weight and low consumption.
The front panel parameters can be adjusted continuously and steplessly, such as start
current, crater arc current, welding current, base current, duty ratio, upslope time,
downslope time, pre-gas, post-gas, pulse frequency, hot start, arc force and arc length
etc. When welding, it takes high frequency and high voltage for arc igniting to ensure
the success ratio of igniting arc.
TIG DC PULSE PFC MV Characteristics
• DC Pulsed TIG and MMA, adopt IGBT and advanced PWM technology
• High performance MCU, Digital control, Digital display
• Preset all parameters with hold process
• HF/Lift TIG, current down slope and up slope, gas post-flow, pulse frequency
• Intelligent protection: over-voltage, under-voltage, over-current, over-heat
1. For MMA, polarity connection can be chosen according to different electrodes
(please refer to 3.5).
2. 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.
3. DC Pulsed TIG has the following characteristics:
–
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
–
Workpiece gets little heat. Arc energy is focused. Suitable for thin sheet and
super thin sheet welding.
–
Exact control heat input and size of molten pool. Depth of penetration is even
and suitable for welding one side and forming two sides and all position pipe
welding.
–
High frequency arc can make metal for microlite fabric, eliminate blowhole and
improve the mechanical performance of the joint. It is also suitable for high
welding speed for improved productivity.
TIG DC PULSE PFC MV-series welding machine is suitable for all position welding for
a variety of plates of stainless steel, carbon steel, alloyed steel, titanium, magnesium,
cuprum, etc, also applied to pipe installation, mould repair, petrochemical,
architectural decoration, car repair, bicycle, handicraft and DIY.
MMA Manual Metal Arc welding
PWM Pulse-Width Modulation
IGBT Insulated Gate Bipolar Transistor
TIG Tungsten Insert Gas welding
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