Top Gun 351 SWF, Руководство пользователя

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10
Distance from the MIG Torch Nozzle to the Work Piece
The electrode wire stick out from the MIG Torch nozzle should be between 10 and 20.0mm. This distance may vary depending on the type of
joint that is being welded.
Primary Adjustable Variables
These control the process after pre-selected variables have been found.They control the penetration, bead width, bead height, arc stability,
deposition rate and weld soundness.
They are:
• Arc Voltage
• Welding current (wire feed speed)
• Travel speed
Secondary Adjustable Variables
These variables cause changes in primary adjustable variables which in turn cause the desired change in the bead formation.
They are:
1. Stick-out (distance between the end of the contact tube (tip) and the end of the electrode wire). Maintain at about 10mm stick-
out.
2. Wire Feed Speed.Increase in wire feed speed increases weld current, Decrease in wire feed speed decreases weld current.
Travel Speed
The speed at which the molten pool travels influences the width of the weld and penetration of the welding run.
MIG Welding (GMAW) Variables
Most of the welding done by all processes is on carbon steel.
The items below describe the welding variables in short-arc welding of 0.6mm to 6.4mm mild sheet or plate. The applied techniques and
end results in the GMAW process are controlled by these variables.
Pre selected Variables
Pre-selected variables depend upon the type of material being welded, the thickness of the material, the welding position, the deposition
rate and the mechanical properties.
These variables are:
• Type of electrode wire
• Size of electrode wire
• Type of gas (not applicable to self shielding wires FCAW)
• Gas flow rate (not applicable to self shielding wires FCAW)