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Thursday, January 7, 2010

Mig Welding, The Most Common Welding Process

By Peter Smith

Wire feed welding otherwise known as mig welding is a very fast technique of putting down filler metal. It is much faster and quicker than other welding processes.

Automated robots are used in manufacturing facilities to perform repetitive mig welding tasks. They are used to manufacture cars, trucks, boats and a whole other range of miscellaneous items. Because it is faster than tig or stick it makes it an ideal candidate for automation.

The technical name is GMAW or Gas Metal Arc Welding.

Exactly what it is I have described here for you. It is simply a length of wire that has an electrical current flowing through it. It is fed through the torch and this wire then constantly melts in an arc into the base metal.

Here are some reasons why it is a preferred process to use:

1. Is reasonably simple to do.

2. It is the most efficient method as it can get the same job done quicker.

3. Is less expensive and more economical.

4. Welding automation devices can be fitted to maximise productivity.

5. A shielding gas can be used in the process to create smoothly finished welds.

The shielding gas provides you with better control over the spatter of the molten pool of metal that is created. A variety of gases can currently be selected for this type of welding.

It is a very versatile machine because you can work with a whole range of different types of metals. The most commonly welded materials using this process are stainless steel, mild steel and hardened steel such wear plate and aluminum.

Before you buy a machine you need to first think about what you plan to weld with it. As the thicker the metal the more power you are going to need.

I always like to say to people to buy a machine which is slightly more powerful than what they think are going to need to use right now. This way it sort of future proofs them for later on down the track when they need to tackle larger projects. I know it always happens to me, I go and buy something and then a few months later I say to myself gee I should have bought the bigger or better version.

At the same time you are going to need to get some spare parts to keep it running properly. The most common parts or consumables that you will need to have a constant supple of are item like. Contact tips, tip holders, gas diffusers, nozzles, shrouds, insulators and a spare liner. These are all depending on the model and brand of you mig welding gun. Drive rolls or feed rolls do need replacing as well but they do last a long time, it all depends on how much you are doing and what brand and specification of wire you are running.

Mig welding is so readily accepted in the manufacturing industry and it has seen many different applications. From specialized welding situations to the man at home in his shed doing some DIY mig welding is here. - 21392

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