April 8th, 2008 
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Arc welding has given us a significant large major step up in the construction of metal parts. So, how precisely does it work?
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The arc creates enough sustained high heat to melt the metal at the point of the arc allowing the metals to fuse. Electrodes come in 2 differing kinds. They are either consumable or non-consumable depending on if the electrode is really used up in the welding process or is able to be reused. These are just a few facts about arc welding.
The welding area is typically guarded by some form of inert gas. This is known as shielding. In the early days of arc welding, the shielding gases were oxygen and nitrogen. They tended to be crisp and porous and tended to fail. In the middle of the last century, research proved that hydrogen worked far better.
The welding industry is extraordinarily fond of the employment of initials in describing the various welding processes. MIG and TIG welding is a fine example. MIG welding means metal inactive gas welding and TIG welding is tungsten inert gas welding. Other common expressions are SAW for submerged arc welding and FCAW for flux-cored arc welding. The truth is that welding, although a particularly highly skilled craft, isn’t that hard to master. This is an important fact about arc welding because there is a dreadful deficit of qualified welders and the demand is growing every day. It was recently reported that the average age of the pro welder was a particularly high 54 years. It is easy to see that this rather old work force will be reaching retirement age in high numbers over the following a decade. This has led straight to the arc welding field being called one of the finest kept systems in the future work picture.
Due to the use of high voltage electric currents and unusually high temperatures, arc welding has traditionally been viewed as rather dangerous occupation. The risk from burns and electric shock was high in the past and the reputation was rather deserved. In fact, welding is now thought to be no more dangerous than crafts such as carpentry and plumbing.
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Watch the video related to mig welding
Soudure TIG – TIG Welding … Soudure TIG MIG Welding Weld “video soudure” “weld video”
Help answer the question about mig welding
What is the difference between Mig and Arc Welding? Also, is Arc the same as TIG welding?Have to do an assignment describing the mig and arc welding processess. Not sure if mig and arc welding is the same thing and if it isnt, not sure if arc and tig is the same thing? Please help?
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ok ok
But you have to promise to watch my new beef jerky in the oven video …lol
mig welders need a shield gas unless u use flux core wire.
the best way to get a nice bead id to set your heat, and turn up the wire feed speed,…..strike an arc and turn down the wire feed till you get a nice bead with little splatter
Possum
you may want to do a search on that (google). That may give u the help u need. Good luck!
i have seen worse welding from 30 year olds realy nice job
That weld looked pretty good. better than I everd did with that machine.
Mig welding job listings in Dallas TX:
http://electricalengineer.electrical-designer-guide.com/a/jobs/find-jobs/q-mig+welding/l-dallas+TX
I would recommend Lincoln Electric wire it’s nice and you can make pretty welds with any wire it just takes some practice and if you shine ‘em up, you can get you welds to look like TIG welds!!!
thanks
you’ve got some pretty good videos and now I’m thinking about buying that little arc welder…. How thin of metal can it do and can you make a video trying the welder at all amp.
First off, are you a good welder? If you have limited experience, you will not get good weld penetration with a MiG welder. Also if you use one of the cheap welders that you can buy at Lowe's or auto parts stores, they don't produce enough power to get a deep penetrating weld.
MIG means machine inert gas. Those cheap welders are called MiG but are just wire feed welders and not MiG. You must use gas to get a good weld. A cheap gas to use if you are a good welder is carbon dioxide. The weld is good only if you are very experienced. Next you can use 75/25 gas mix which is 75 % argon and 25 % carbon dioxide. Doesn't take as much skill and produces a reasonable weld. For a top job, use 100% argon. It costs a little more but does so much more.
If you buy a MiG, get a good one in the $2000 dollar range, such as a commercial Lincoln, Miller or Hobart. Go to welding school at your local Vo-tech and practice, practice, practice. Once you learn, you can weld car doors, bodies, exhaust, frame or anything else you so desire. As a good MiG welder, you can get a top paying job and be set for life. I prefer a auto darkening helmet when I weld. It makes learning so much easier.
Consistency, quality, and operating cost. Remember, you don't need highly trained welders, just machine operators to run them.
Hope you are not using pure argon (just a wast of money for pure). You should be using a 75/25 mix of argon/co2. The shielding gas shields the molten metal from the atmosphere, more so oxygen and nitrogen to prevent porosity, and reduce the chance of cracks. To rent a tank you should call a local welding supply for the prices as the price varies quit a bit by location. I am in Ohio so a price I would give you would not be true for your location.
Here is a good site to look at, http://www.weldingtipsandtricks.com/index.html
http://www.weldingtipsandtricks.com/Mig-welding-tips.html
(32 years welding)
Do you recommend a certain brand of flux wire? And is it hard to make the welds look decent?
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)
I used it to make a “suit of Armor” like dude that was made of tacked pieces of paper thin tin like steel and it worked if I hit it real fast. I mainly use it for 16gua-3/16ths/ Sure I’ll make another video with it turned up. I’ll go do that right now as a matter of fact.
glad you asked, Mig welding is really a simple task if you can already stick weld. what you see is what you get with a mig. follow the following process and you'll do great.
if right handed hold the handle slightly to the left just enough to see the wire sticking out of the nozzle, weld to the left in an overlapping circular pattern usually between 1/4 and 7/16 wide the lens should be sufficient if for arc welding. a quick practice on scrap metal should ease your concerns quickly. you will see the deposited weld in the lens and no chipping needed
ok thanks. I have a REALLY tight budget so i would rather use cheap wire..but i still want the weld to look and perform decent. Im gonna lift my lawnmower about 4 inches so i need it strong and i want it to look as good as possible so i was just asking. Thanks a lot!
There is a big difference between MIG and TIG welding, in both the process, and the skill level required of the weldor. They really are two different processes altogether, and the MIG is the much easier of the two.
There is much to read on the web, including some great information at the Miller and Lincoln websites. They can give you a pretty great overview of TIG welding. But, as with many skills, it takes hands-on practice as well as study, to be successful.
If your fiance has ever welded with a gas torch, he might already have the skills he needs. Unlike a MIG welder, a TIG does not feed an electrified filler wire for you. You are in control of a separate heat source (the torch) that you must manipulate in order to melt the base metal together, while adding the filler by hand to the molten puddle you're creating. It's the same way a gas torch works, just with electricity, rather than gas, as the heat source.
The tricky part comes in learning how hot to make the puddle, how much heat to apply (with a foot or hand controller), and how to coordinate the filler at the same time. Quite often, TIG welding involves metals like aluminum or stainless, which have their own quirks that need to be considered. It's by no means impossible to learn all of this…and it can be a very valuable skill to have, often paying higher than MIG welding jobs.
If your fiance shows this prospective employer that he is a professional who takes pride in his work, has studied the subject, and is willing to learn, he may get his foot in the door and start down a new path on his welding career. I wish him the best. Study all you can, and if you know a buddy who is good with the Oxy-Acetylene torch, go visit him right away for some practice!
Best of Luck!