Cloos GLW 322, Инструкция по эксплуатации и запасные части

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GLW 322
Cod.006.0001.1861
01/09/2014 v2.0
ENGLISH
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4.3 WELDING PARAMETERS
For a better understanding of the parameter functions described in the table, refer to the following diagram.
(I1) WELDING CURRENT
(I2) BASE CURRENT
(I3) FINAL CURRENT
(I4) STARTING CURRENT
(t1) UP SLOPE TIME
(t2) PEAK TIME
(t3) BASE TIME
(1/t2+t3) PULSED CURRENT FREQUENCY
(t4) DOWN SLOPE TIME
(t5) PRE GAS TIME
(t6) POST GAS TIME
WELDING CURRENT
Output current value during welding.
MAXIMUM CURRENT WITH REMOTE CONTROLLER
Maximum output current value that can be achieved with remote
controller external reference.
HOT-START
This parameter aids electrode melting at the time of arc striking.
Consequences of a higher value:
-
Easier arc strike.
- Increased spatter at welding start.
- Increase of strike area.
Consequences of a lower value:
-
More difficult arc strike.
- Less spatter at welding start.
- Smaller strike area.
ARC FORCE
This parameter helps to avoid electrode sticking during welding.
During electrode fusion low conductivity parts of the coating become
detached and tend to become interposed between the electrode tip as
it is fusing and the workpiece. This condition results in an interruption
of the arc. In addition, it may occur that the electrode comes into
contact with the workpiece creating a short circuit and consequent
quenching of the arc. To avoid arc quenching the power source
therefore delivers instantaneous peak currents in correspondence
with preset arc voltage thresholds.
Consequences of a higher value:
-
Fluidity during welding.
- Welding arc stability.
- Greater electrode fusion in workpiece.
- More welding spatter.
Consequences of a lower value:
-
The arc is extinguished more easily.
- Less welding spatter.
PRE-GAS TIME
Time of gas delivery before the arc strike.
This adjustment is required when fixing points must be created or
when welding in hard-to-reach positions that call for the presence of
inert atmospheres before striking the arc.
Consequences of a higher value:
- This parameter allows a shielded environment to be created,
thereby eliminating contaminants at the start of the welding pass.
STARTING CURRENT
Unit current output value immediately after the arc strike.
The usefulness of having an adjustable initial welding current is that of
avoiding welding the part with excessively high current values and
thus potentially damaging it.
SLOPE UP
Time during which the current changes from the starting value to the
welding value by means of a slope.
This setting is used to avoid damaging the edges of the joint with
excessively high current values at the moment of arc striking. The
value of the main welding current is increased gradually in order to
control the uniformity of material deposition and weld penetration.
SECOND CURRENT B-LEVEL
With a rapid press and release (less than 0.5 seconds) of the torch
trigger during welding, the output current value switches to the value
set by means of the “B-level second current” parameter.
This function makes it possible to avoid interrupting the welding
process when the geometry of the workpiece changes; alternatively,
the welding current can be reduced to decrease heating of the part if it
becomes too hot during execution of the welding process.
In DC TIG welding, the parameter is useful when welding different
gauge workpieces during the same pass; when moving between
different gauges the output current can be changed simply by
pressing the torch trigger.
BASE CURRENT
Pulsed wave minimum current.
Consequences of a higher value:
- Faster creation of weld pool.
- Increase of heat-affected zone.