October 19th, 2009 
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Many people do welding work for a living. Welding means pieces of materials are joined together. A welder can join certain metals like steel aluminum, brass, stainless steel, plastic or polymer. Welder also means equipment used for welding process. There are various types of welding like Arc welding, MIG Welding, TIG Welding etc.
MIG (Metal Inert gas) welding is also called as GMAW (gas metal arc welding) is generally used for welding aluminum and other non-ferrous metals. The major advantage of this type of welding is that metals can be welded much quicker than traditional welding “stick welding” techniques. It can be used with a variety of metals and alloys. MIG welding produces a clean weld with very little splatter.
TIG (Tungsten inert gas) welding is a process of blending together reactive metals such as magnesium and aluminum. During the process of TIG welding, an arc is formed between a pointed tungsten electrode and the area to be welded. As a result of the gas shield, a clean weld is formed. This prevents oxidization from occurring. TIG welding can be used for different joints like butt joint, lap joint, corner joint and t-joint.
Gas metal arc welding (GMAW) is an automatic or semi-automatic welding process. Shielding gas and a continuous, consumable wire electrode are fed through a welding gun. GMAW uses a constant power source such as voltage or a direct current to weld together materials such as steel and aluminum. This welding is generally used in sheet metal industry. The equipment used in GMAW is a welding gun; a wire feed unit, an electrode wire and a shielding gas supply.
Arc welding is done through the use of an electrical current, and can be performed by using inexpensive equipment. Resistance welding involves the use of additional sheets of metal to encase the pieces to be welded together. It is the most environmentally-friendly of all methods, but it requires costly equipment that cannot be used in all situations. Energy beam welding, also known as laser beam welding, is one of the most modern techniques used. Laser welding is fast and accurate, but the high equipment cost makes it prohibitive for many industries.
Welding cannot be done with all types of metals, as some materials, such as stainless steel, are prone to cracking and distortion when overheated. Alloys are particularly problematic, since it’s hard to know the exact chemical composition of the metal. Welding has become highly automatized over the last decade, and the use of welding robots is now commonplace in certain industries, such as the automotive manufacturing plants.
Watch the video related to mig welding
short video of a welding begining in a pipe with 900mm diameter…
Help answer the question about mig welding
Good Morning world!!!I need to find and Speak to Someone who knows the in's and out's of Mig welding?I Need a mig welder, to do some motorcycle art work I Do and sell.
Miniature motorcycles and Trikes.
I need to find out ..Just what type and size of mig welder i need to get to do what needs to be done, far as the the welding end of it. I need a fair Price… and a whole lot of information
God Bless all this Beautiful Tuesday Morning!!!!!!!
ken
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you may want to do a search on that (google). That may give u the help u need. Good luck!
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
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)
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
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!
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)
Mig welding job listings in Dallas TX:
http://electricalengineer.electrical-designer-guide.com/a/jobs/find-jobs/q-mig+welding/l-dallas+TX
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.