Arc Machines M96, Руководство по эксплуатации

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Doc No. 740048 17
MODEL 96
TUBE TO TUBESHEET WELD HEAD
OPERATION MANUAL
8.0 NOSE RINGS (Cont’d.)
The feet are positioned in a pattern so when the head is rotated into the
correct position on the tubsheet, all three feet will be positioned in the
space between tubes, allowing the head to sit flat and parallel to the
tubesheet.
CAUTION
Do not initiate a weld sequence unless all nose
ring feet are sitting flat on the tubesheet,
and not on adjacent welds.
9.0 SHIELDING GAS (Arc Gas)
The type of shielding gas used has a profound effect on the character of
the arc and the depth of weld penetration. The most commonly used
shielding gas used is Argon. Gas mixtures of 95% Argon/5% hydrogen
or 75% helium/25% argon are sometimes used to achieve deeper
penetration. Consult the factory for recommendations.
The Model 96 is designed to flow arc gas at 20 - 40 CFH (9.4 – 18.9 lPM).
As a general rule, use lower flow rates for small diameter tube and higher
flow rates for larger diameter tubes. This is because the larger the tube is,
the more gas can escape down the tube.
Use the Manual Purge button on your power supply to open the solenoid,
and set the flow rate at your flow meter.
Note: If the system is being hooked up for the first time, or if it has been a
number of hours since it was last used, it’s a good idea to initiate
the Manual Purge button on the power supply to clear the lines of
oxygen for a few minutes before initiating a weld sequence.