STEALTH DIGI-TIG 320 AC/DC PULSE
5. 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.
The DIGI-TIG 320 AC/DC PULSE welding machine is suitable for all welding positions
for a variety of plates of stainless steel, carbon steel, alloyed steel, titanium,
magnesium, cuprum, etc, also applied to pipe installation, mould repair, petro-
chemical, 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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2.2 Module Explanation
The module explanation of arc welding machine must accord with the National
Standard GB10249, explained as follows (using the TIG 180 DC PULSE PFC MV as an
example).
TIG 320 AC/DC PULSE
SUMMARY
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IGBT——Insulation Gate Bipolar Transistor
TIG——Tungsten Insert Gas welding
§2.2 Module Explanation
The module explanation of arc welding machine must accord with the correlative prescripts of
National Standard GB10249. It is explained as the following (take TIG 320 AC/DC PULSE as an
example).
TIG 320 AC/DC PULSE
PULSE
AC/DC welding machine
Max welding current 320A
TIG welding machine/MMA
§2.3 Working Principle
The working principle of TIG 320 400 AC/DC welding machines is shown as the following figure.
Three-phase 380V work frequency AC is rectified into DC (about 312V), then is converted to medium
frequency AC (about 20KHz) by inverter device (IGBT module), after reducing voltage by medium
transformer (the main transformer) and rectifying by medium frequency rectifier (fast recovery diodes),
then is outputted DC or AC by selecting IGBT module. The circuit adopts current feedback control
technology to insure current output stably. Meanwhile, the welding current parameter can be adjusted
continuously and steplessly to meet with the requirements of welding craft.
Rectify
Inverter
Medium
frequency
transformer
Medium
frequency
rectify
Hall device
Current positive-
feedback control
DC
AC
DC
AC
DC
380V,50HZ
Three-phases AC
PULSE
AC/DC welding machine
Max welding current 320A
TIG welding machine/MMA