Welding 101

By: Kelly Buchanan

Here at bo-mar, we offer a variety of welding techniques–MIG welding, TIG welding, and spot welding.  What does that mean exactly? Sure, you could always Google this information, but allow us to save you time.

 

MIG (Metal Inert Gas) welding is the welding process in which an electric arc forms between a consumable wire electrode and the workpiece metal(s), which heats the workpiece metal(s), causing them to melt and join together. MIG welding requires three things: electricity to produce heat, an electrode to fill the joint, and shielding gas to protect the weld from the air. This is the most common form of welding because of its versatility, speed, and ease (relatively speaking.)

MIG welding

TIG (Tungsten Inert Gas) welding an arc welding process that uses a non-consumable tungsten electrode to produce the weld.  TIG welding is generally more advanced than MIG welding because it requires the welder to use both hands–one for the welding torch and the other for the filler metal. While TIG welding is a slower process than other forms of welding, it is mostly used for critical weld joints, welding metals other than common steel (such as titanium), and for small, precise welds.

TIG welding

Spot Welding is a process in which contacting metal surfaces are joined by the heat obtained from resistance to electric current. Workpieces are held together under pressure exerted by electrodes.

Spot welding

1 Comment

  • Andre Franklin | January 20, 2015

    I’ve always found welding to be pretty cool. It’s interesting to see how each of these different types of welding work. Though, I can’t see spot welding being something that is used for a wide variety of projects. Aside from that, would it be correct to assume that most on-site projects would use MIG instead of TIG? I can’t imagine there are many projects out there that would require more than that.