Basic Welding Guide; Mig (Gmaw/Fcaw) Basic Welding Technique - Thermal Arc Fabricator 181i Operating Manual

3 in 1 multi-process welding systems

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Table of Contents

4.01 MIG (GMAW/FCAW) Basic Welding Technique

Two different welding processes are covered in this section (GMAW and FCAW), with the intention of providing the

very basic concepts in using the MIG mode of welding, where a welding MIG Gun is hand held, and the electrode

(welding wire) is fed into a weld puddle, and the arc is shielded by an inert welding grade shielding gas or inert

welding grade shielding gas mixture.

GAS METAL ARC WELDING (GMAW): This process, also known as MIG welding, CO

short arc welding, dip transfer welding, wire welding etc., is an electric arc welding process which fuses together

the parts to be welded by heating them with an arc between a solid continuous, consumable electrode and the

work. Shielding is obtained from an externally supplied welding grade shielding gas or welding grade shielding gas

mixture. The process is normally applied semi automatically; however the process may be operated automatically

and can be machine operated. The process can be used to weld thin and fairly thick steels, and some non-ferrous

metals in all positions.

FLUX CORED ARC WELDING (FCAW): This is an electric arc welding process which fuses together the parts to

be welded by heating them with an arc between a continuous flux filled electrode wire and the work. Shielding is

obtained through decomposition of the flux within the tubular wire. Additional shielding may or may not be obtained

from an externally supplied gas or gas mixture. The process is normally applied semi automatically; however the

process may be applied automatically or by machine. It is commonly used to weld large diameter electrodes in the

flat and horizontal position and small electrode diameters in all positions. The process is used to a lesser degree

for welding stainless steel and for overlay work.

Manual 0-5191

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