How Mig Weld Sheet Metal

It is better to use instead of a high percentage of co2.

How mig weld sheet metal.

Learn how to mig weld automotive sheet metal in about 5 minutes or less. Tig welding sheet metal. It doesn t have a huge amperage range but it provides everything you need to mig weld sheet metal. Otherwise you may find a lot more splatter than you have imagined.

When mig welding sheet metal it is important to set the proper parameters to prevent warping and burn through or else it will create excess heat and easily blowholes on the metal. This is a simple machine with very few settings but it runs an impressive bead and can get down to a low amperage range to ensure you can run smooth welds without blowing through your joint. As a rule when mig welding sheet metal never use a body filler metal that is thicker than the base metal. Mig welding uses an arc of electricity to create a short circuit between a continuously fed anode the wire fed welding gun and a cathode the metal being welded.

I keep it short and to the point in this welding instructional video and show how ve. It is recommended that a welder should use 023 or 024 inch wire for light gauge sheet metal work. The heat produced by the short circuit along with a non reactive hence inert gas locally melts the metal and allows them to mix together. Keep in mind during the welding process it is important to direct the arc right at the center of the weld puddle and don t do movements like whipping or weaving as it may cause warping and burn through quickly.

When starting to learn auto body sheet metal welding with a mig welder you should opt for a shielding gas that has a higher proportion of argon gas. Holding the tip too far from the surface will cause the wire to have to come out too far to touch the metal. Don t attempt to weld thin materials like sheet metal with flux cored wires which put more heat into the base metal. It is better to avoid using a flux cored wire when welding sheet metals.

Keep the stick out short stickout of your mig wire is important when welding any type of metal but especially sheet metal. This means the extra wire causes the voltage to drop by the time it actually gets to the surface and strikes an arc. Butt welded panels withstand stress better than any other type of weld joint. The best way to weld sheet metal panels together is by butt welding which is joining them side by side see picture below.

This drops the voltage and heat of the weld arc and causes the welds to sit proud no penetration on top of the metal. Forget the larger 1 8 inch tungsten electrode and use a smaller one.