1. Learn the foundation of mig welding

The procedure is GMAW (Gas metal arc welding ) , popularly known as MIG welding ( Metal Inert Gas welding) . MIG welding was developed during World War II as a fast, movable process to create strong , durable joints. Nowadays it is used in many shop and factory applications as well as by home hobbyists and welding enthusiasts

mig-welding-machine

2. Learn how it works

MIG welding uses a machine to feed a wire through tip into a MIG gun. The electrically charged contact tips transfers the welding current to the wire. The arc is established betwwen the wire and the base metal. Often times an inert gas is used, which flows out of the gas noozle to shield the welding process from the atmostphere / There are several modes of metal transfer:

  • Short circuit (thin metals)
  • Globular transfer ( heavier metals)
  • Spray transfer (hottest)

3. Understand the applications

Once you learn how to use a MIG welder, you can make repairs around the home. A MIg welder can beused on stainless steel, mild steel, and aluminium of all thickness. Shielding gases will vary depending on base metal and welding wire.

mig-welding-machine-how-to-work

4. Safety gear

– Assemble your safety gear

  • You will need a full set of safety equipment to ensure your safety while welding. This includes gloves, marks, and protective clothing
  • Make sure that all of your skin is covered to prevent overexposure from UV rays. You will need a mask with at least a#10 shade of darker. This will help prevent arc eye.
  • If you are working in a poorly ventiliate area, you will need a vapor mask to minimize the amount of toxic vapors inhaled during the welding process.
  • Wear gloves that can protect your skin from molten metal
  • Keep CO2 extinguisher and a bucket of sand nearby for emergency fires

-Select a cofortable MIG gun

  • Some are shaped like pistols, while others may look like acetylene torches. The size of machine will depend on the size of the project
  • A MIG gun may also be water or air cooled. Air cooled guns are used for 200 amps or less and are easier to manipulate is small areas. The air cooled gun is the type that home MIG welders typically use

-Prepare the arc to be welded in

Remove all flamable material and find a good surface to weld on. Athough you can put the ground connection right on the piece you are welding, most shops have a large metal workbench that the ground is hooked up to

If there are other peple present, set up welding curtains around the work area. This will protect them from UV damage

(Source: http://en.hongky.com )