Blowing Holes In 20 Ga Sheet Metal With My Mig

My names matt urch and i own and.

Blowing holes in 20 ga sheet metal with my mig.

The one thing to avoid when tig welding with dcep is too much current. That perfect balance between too hot a weld blowing holes and too cold a weld not enough penetration is where you want to be. What this does is concentrate 2 3 of the heat on the tungsten electrode and prevent blowing holes in the sheet metal. In some other cases a rounded or tapered ball end electrodes can be used for welding sheet metals with dcep direct current electrode positive.

Fortunately this balance is pretty wide for at least normal welding on your car. 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. Hot or cold weld. 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.

The majority of the sheet metal welding i ve done was with a 90 amp 110 volt welder. Imagine a butt weld on 20 to 24 gauge metal. On sheet metal you always stitch weld to prevent blowing holes and warping the metal from overheating. Is the metal on the minor is thinner than the stuff you ve been practicing on.

Keep the stick out short stickout of your mig wire is important when welding any type of. The thin metal technique is a non continuous process that is used for thin metal such as car body panels. You can also try to redesign the part with joints that can. If it s blowing through quickly then maybe the power is set too high on the welder.

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. If the parts fail to touch each other for even 1 16 inch you have created a hole that invites burn through and a gap that can t absorb the heat. How often are the holes appearing. Mig welding sheet metal.

The aim with this technique is to melt a bit of metal and then let it cool slightly before melting the next and it s a handy way to avoid blowing holes. For thinner gauge sheet metal like 18 or 20 gauge we suggest 023 6mm wire in your mig welder. Here s a quick video on how to plug weld sheet metal using mig without blowing yourself a bigger hole than you started with.