April 7th, 2008 
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Welding is simply using electricity to melt metal together. Simple as that, nothing more nothing less.
Mig welding is called “Metal In Gas” welding. In the early days it was called “Metal Inert Gas” welding. But some gases that you use in the mig welding process will actually not be “inert”.
Some gases will actual be the opposite which is “active”. So now there is also another name and that is MAG welding or “Metal Active Gas” welding.
But in general it’s just mig welding.
Next…..
The biggest thing that makes a mig welder a mig welder is that you hold onto a mig welding gun http://www.learn-how-to-weld.com/welding-torch.html
The mig welding gun or welding torch feeds the electricity needed to weld. It feeds the shielding gas needed to weld and it also feeds the mig welding wire to the weld.
When mig welding with a mig welding gun, all you do is “in a nut shell” pull the trigger and away you go. Simple.
Mig welding is the easy way to weld.
Arc welding http://www.learn-how-to-weld.com/arc-welding.html is still using electricity. But this time there is no shielding gas, and there is no constant feeding of mig welding wire into the weld.
When arc welding you will use a welding rod or welding electrode. On the welding electrode there is a coating of flux. When you weld, this “flux” will burn off and create the shielding gases needed to weld.
Like in mig welding you need a shielding gas, with arc welding or also know as SMAW (Shielded Metal Arc Welding), you still need a protective gas to weld. This is how it is done with stick welding by using the flux coating on a welding rod.
You can mig weld mild steel, stainless steel, aluminum, high tensile steels, etc.
And you can arc weld mild steel, stainless steel, high tensile steels as well.
I’m not 100% sure if there is a welding rod to weld aluminum ( I think there might be). If there is, it is not extensively used in industry as I have not heard or seen of it being used.
Cheers,
Peter
http://www.learn-how-to-weld.com
Watch the video related to welding
Jay Leno shows his custom car built by welders. He speaks on behalf of the American Welding Society. Jay Leno encourages young people to become a welder and the benefits it has in the future.
Help answer the question about welding
What welding operations do i need to consider when building the hulls of a large ship?I want to research on what welding operations are needed when trying to weld large sections of steel together to form a hull of the ship.
what are the drawbacks and benefits of welding operations today for this kind of process?
what would be the best one for the job?
Thank you very much!
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nice weld
the metal isnt dirty enough to affect it. I certified with metal that looked like that
I would like to see that weld cut open and sent to a lab for testing. HE DID NOT EVEN CLEAN THE METAL. Dirty welds have poor penetrations and are set up to fail. People, if you are too lazy to clean the metal, don’t weld.
My Husband is a trade qualified Boiler maker with 14 years experience, He has suggested that, depending on your experience with welding, a MIG is not only far easier to use then ARC welding on lighter material, but once set up and shown the basics, is easier enough to use on the materials you have outlined. The mechanical properties that the wire and the gas will give as a combination should provide a more then adequate joint, provided your materials aren't too exotic. Even so, sourcing a wire gas combination to suit that particular metal is not that difficult.
Mig and TIG welding are all arc welding. TIG is arc welding in the presence of a tungsten electrode which is non-consumable and an inert gas and the welded material. This is usually used in the aircraft industry. MIG welding is still arc welding in the presence of argon and wire feed consumable. TIG is usually a better welding technique. These are different from stick arc welding which uses flux coated sticks in developing an arc.
Have you guys seen “You Can’t Weld This!”? It’s pretty funny… The guys over at WeldingMart com had it made! Do a youtube search for it
Pictures are worth a Billion words!!
First link below (open them in a new window if you want, it is easier).
That weld has the right Caterpillar look, but on the round pipe side is the dark smoke look – to ME (and without brushing the weld) it looks "Cold" on that side.
That "Caterpillar" look is what you are looking for in Any Arc weld – and Mig's as well unless you do a 'one pass weld' they are NOT strong.
A "One Pass" weld is where you just lay the rod down where you want the weld to go, and walk away – I have seen it done, the weld works for light stress but it is not strong and won't pass x-ray tests.
The second link has a photo album of welds, all dam good welds IMO / they are brushed so you can see them better.
The "Slug" look your talking about 'sounds' like a ground weld or a "One Pass Weld"- all welds will look basically the same (even computer welds – because the physics are the same, the human element is just removed)
To "Weld" you do 3 things, heat part 1 to the point of melting, but not running, heat part 2 to the point of melting but not running, insert a higher heat (stronger) metal to the two and cause them to flow together – it is an art – when you are pushing that metal into the weld you normally move it in very small circles – that gives you the stacked dimes or what we always called a Caterpillar look
Dont hold….!!!!
P.O Nobel
making a triangle is a good technique
18v with 260 wire… I think you should use less wire, more like 190-210. But that’s just me. Weld would look flatter. Have a nice d@y! =)
It should not take you very long at all since you are already certified as a TIG welder. Getting certified will require a certain number of hours training and taking a test of course, but you should not have any trouble doing it.
On your first try, you will probably lay a better bead than I ever did.
Doc
be careful using aerosols, especially cooking oil, near a flame or high temperature spark.
i am thinking flamethrower
Try these sites,
http://www.weldingtipsandtricks.com/index.html
http://ezinearticles.com/?expert_bio=Jody_Collier
(32 years welding)
very nice hand still
MIG is a lot easier on thin metals. But if you know what you are doing you can do just as well with arc welding. It all depends on how much heat you use. If you want to use an arc welder and save on buying a MIG practice on some scrap pieces til ya figure it out
Hahaha I work at a Sawmill If the welders where I work cleaned all the metal before they welded they wouldnt be welding very much! I see them blast the metal quikly with a torch and then weld away!
If the nozzle is arcing it means the insulator between the nozzle and gas diffuser is probably shot. You will have to either replace the insulator or make sure you don't touch the work piece.
Arcing outside the weld zone is not good, can lead to inbrittlement and cracking.
Oh, and good job on buying a miller…i hate it when people buy crap gear and expect miracles(or ask me to perform them with their junk welder)