Pulse Welding - Fronius TransPocket 150 Operating Instructions Manual

-
-

Pulse welding

Pulse welding is welding with a pulsing welding current. It is used for out-of-position weld-
ing of steel pipes or when welding thin sheets.
In these applications the welding current set at the start of welding is not always ideal for
the whole welding process:
-
-
Setting range: 0.5 - 100 Hz
Operating principle:
-
-
-
The power source controls the Duty cycle dcY parameter and base current I-G ac-
cording to the set pulse current and pulse frequency.
30
Arc-force dynamic = 20
- arc-force dynamic with 40 A current increase
- harder, more stable arc
Arc-force dynamic = 60, set welding current = 100 A
- for the TransPocket 150: actual increase is just 80 A as the maximum current limit
is reached!
- for the TransPocket 180: arc-force dynamic with 120 A current increase
if the amperage is too low, the base material will not melt sufficiently
if overheating occurs, the liquid weld pool may drip.
A low base current I-G rises steeply to the significantly higher pulse current I-P and
drops back to the base current I-G after the Duty cycle dcY time. The pulse current I-
P can be set on the power source.
This results in an average current that is lower than the set pulse current I-P.
During pulse welding, small sections of the welding location melt quickly and then rap-
idly re-solidify.
NOTE!