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Gas Metal Arc Welding (GMAW) or MIG Welding


Gas Metal Arc Welding is generally known  as MIG (Metal Inert Gas) welding.  Metal Inert Gas (MIG) welding is a commonly used high deposition rate welding process.  Wire is continuously supplied from a spool.  MIG welding is known to as a semiautomatic welding process.

Principle of Operation

Gas Metal Arc Welding (GMAW) or MIG Welding
Gas and water flow are checked again and again before catching the fire (igniting). Proper current and wire feed speed is set and the electrical connections are ensured. There are two methods to struck the arc. 
In the first method current is passing and shielding gas is switched on to flow. Now the electrode is scratched against the job like normal practice for striking the arc. 
In the second method, electrode touches the job, retracted and then   moved forward to carry out the welding;  before striking the arc, shielding gas, water and current is switched on. About 15 mm length of the electrode is out of the torch before striking the arc. During welding, torch remains about 10-12 mm the job and length should be between 1.5 to 4 mm. Arc length is maintained constant by using t self-adjusted arc, and self-controlled arc in semi-automatic (manually operated) and automatic welding sets respectively.

12 comments:

  1. Akshara desaiApril 3, 2015 at 2:22 AM

    Thanks for sharing such a nice and Informative blog.Keep posting information like this. You can also check Precision Drawell website for Mig Welding Wire Manufacturers.

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  2. Anna SchaferJanuary 3, 2016 at 7:16 PM

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  3. Rob SimpsonAugust 20, 2016 at 3:28 PM

    A bit informative of how MIG welding works as explained on the Principle of Operation. Hope to see more of MIG welding articles in the future here in your blog. Thank you for sharing.

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  5. Tom BradlyJanuary 20, 2017 at 12:55 AM

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  7. Tony YoungNovember 16, 2017 at 12:02 PM

    Your article could need some updates on MIG welding but ok so far..

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  8. AnonymousFebruary 23, 2018 at 4:01 AM

    Thank you for sharing such good information, we would like to know more about MIG Wire

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  10. WeldmateJune 12, 2023 at 11:05 PM

    Great share about MIG Welding. Thankyou for blog.

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