How To Mig Weld Sheet Metal Holes

To weld sheet metal with solid wires use electrode positive ep or reverse polarity.

How to mig weld sheet metal holes.

After cutting and fitting the new panel you are now ready to weld the patch panel in place. Tig welding sheet metal. It is recommended that a welder should use 023 or 024 inch wire for light gauge sheet metal work. With these materials use a tri mix gas 90 helium 8 argon and 2 co2.

However i have discovered a much easier method for doing this. Sheet metal warps easily and also can burn through easily. 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. As a rule when mig welding sheet metal never use a body filler metal that is thicker than the base metal.

Tig welding is the way forward for metal under 0 6mm and a mig welder with decent power and wire control is needed for anything less than 0 8mm. I keep it short and to the point in this welding instructional video and show how ve. It takes practice to get it right but once you learn how to do it it becom. Regardless of the reason you will have holes that need welded shut.

This will save burning holes in a panel and then having to try and fill or repair the damage you created. This may be due to burning through the thin sheet metal welding molding holes fabrication or other reasons needed. If you are welding a large panel then the expansion of the metal during. Hold the panels in place.

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. Short quick welds when welding sheet metal with a mig welder you do not want to try and run one long bead like when you re welding heavier metal. I was hoping to manage a butt weld too but the metal was far too thin for mig and i just blew holes. However if you are dealing with materials that are 18 gauge or thicker one should be able to use 030 inch welding wire.

Don t attempt to weld thin materials like sheet metal with flux cored wires which put more heat into the base metal. Learn how to mig weld automotive sheet metal in about 5 minutes or less. 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. For years i ve triggered the mig welder to weld the hole shut.

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.