Tuesday, August 4, 2015

24 Important Facts about Mig Welding

Important facts about Mig welding for your refreshing knowledge of this universal welding process.

Welding is a hard work. That’s why there needs some relaxing time to refresh yourself after all sweat, even burns you have sacrificed. Below are some facts about Mig welding that will help polish your knowledge and give you some ‘wise’ relaxation. This below list can also used as the note-taking sheet for brand-new welders to remember the key points of Mig welding and all welders to recall basics of this process. Hope you heart it!


Mig welding is another name of Metal Inert Gas Welding.

Developed in the 1940s.

Considered a semi automatic welding process

First called Gas Metal Arc (also, GMA, Gas Metal Arc Welding). There are some different Mig welding names as a result of types of gas used (Inert gas vs. non-inert gas).

Mig welders have a handle with a trigger. The trigger controls the wire feed.

Most used in fabrication shops that come with high production and unlikeness of wind blowing away the gas shielding.

Employs a consumable wire electrode during the welding process fed from different spool sizes.

Unlike just about all other welding processes, Mig welding includes one standard polarity type and voltage type. The voltage is direct current (DC). The polarity is DC electrode positive.

The power source for Mig welding is ‘constant voltage power supply’ while Tig and Arc welding uses ‘constant amperage power supply’.

Mig wire/ electrode types are associated with types of metal to be welded, type of transfer, abrasive resistance, position to be welded.

Common Mig welding electrodes are the solid wire of thickness ranged from .023, .030, .035, to .045.

Requires use of a shielding gas.

For those who may be interested in:

3 common types of gas for shielding in Mig welding are: Argon, Carbon Dioxide, Helium.

The shielding gas used needs be a match with the electrode, and base metal.

4 transfer types used in Mig welding are short circuit, globular, spray, and pulsed spray.

Transfer types are associated with metal type, shielding gas, and machine settings.

Just about every metal can be Mig welded.

Weld area is critically clean.

Brings out a uniform, clean weld bead.

Brings out a weld bead free of slag.

Maintained by shielding gas.

Facilitates welding in all positions.

Produces long welds without repeated starts or stops.

Requires less clean-up.

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