WIA MC114-0, Руководство оператора

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Weldarc 200 AC/DC | Operator Manual | Model No MC114-2
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TIG Welding (GTAW)
Connection for TIG Welding
For TIG Welding, the TIG torch is connected
to the negative terminal. Figure 7 illustrates
the correct connection of the welding torch
and gas supply. Welding grade Argon is
the shielding gas most commonly used for
DC GTAW welding. The torch will require a
tungsten electrode.
Before first use of the welding torch, allow
gas to purge the torch and hoses for
1 minutes at approximately 10 litres/min. For
welding purposes, the gas flow rate should
be set in the range 5-11 litres/min.
Electrode TIG
Thoriated Tungsten electrodes are normally
used for DC welding current.
Tungsten Electrode Preparation
The tungstens needs to be ground to a
point, the grinding should only be in the
direction of the point and should be done
on a fine grit grinding wheel. The resulting
grind pattern will produce a sharp directed
arc. Poor tip preparation will result in
arc wander.
A common practice is to grind the tip
such that the length of the points is
approximately 2 times the diameter.
The result will be an included angle of
30 degrees.
It is important to maintain the electrode
point for DC. If the tip accidently touches
weld pool it will become contaminated and
the arc will become erratic, and will need
to be re ground.
Tungstens containing at least 2% lanthana
will hold a point when used for DC TIG.
7 BASIC WELDING INFORMATION
Fig 7 Connections
for TIG Welding
TIG Torch Work Clamp
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