Blowing Holes In 20 Ga Sheet Metal With My Mig

If it s after an inch or welding the skip method is good do an inch skip to somewhere that s still cold and weld another inch there.

Blowing holes in 20 ga sheet metal with my mig.

The majority of the sheet metal welding i ve done was with a 90 amp 110 volt welder. My names matt urch and i own and. Hot or cold weld. Here s a quick video on how to plug weld sheet metal using mig without blowing yourself a bigger hole than you started with.

Mig welding sheet metal. To avoid rework follow the measure twice cut once rule. If it s blowing through quickly then maybe the power is set too high on the welder. The one thing to avoid when tig welding with dcep is too much current.

In some other cases a rounded or tapered ball end electrodes can be used for welding sheet metals with dcep direct current electrode positive. Mig welding is the preferred method for most automotive bodywork and since sheet metal is the thinnest of metals a large expensive mig unit is usually not required. On sheet metal you always stitch weld to prevent blowing holes and warping the metal from overheating. Imagine a butt weld on 20 to 24 gauge metal.

For thinner gauge sheet metal like 18 or 20 gauge we suggest 023 6mm wire in your mig welder. Fortunately this balance is pretty wide for at least normal welding on your car. If your welding wire is too thick it will take more heat to melt the wire than the substrate and can make it even more prone to blowing holes in the panel. Is the metal on the minor is thinner than the stuff you ve been practicing on.

The mig welder has to be tuned just like a spray gun or your carburetor on you car. The thin metal technique is a non continuous process that is used for thin metal such as car body panels. Keep the stick out short stickout of your mig wire is important when welding any type of. How often are the holes appearing.

That perfect balance between too hot a weld blowing holes and too cold a weld not enough penetration is where you want to be. Ya brent in addition to whats already been said i would say what ya need to do is get a couple pieces of scrap and practice welding them together til you get the settings right. You can also try to redesign the part with joints that can.