Hiw To Weld Sheet Metal With A Mig Welder

Andy gives helpful insights and tips to mig weld thin sheet metal.

Hiw to weld sheet metal with a mig welder.

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. Either way there are certain things that a welder needs to be aware of when mig welding sheet metal. Don t attempt to weld thin materials like sheet metal with flux cored wires which put more heat into the base metal. For thinner gauge sheet metal like 18 or 20 gauge we suggest 023 6mm wire in your mig welder.

Sheet metal has usage in sectors like making automobiles airplane wings and fuselages roofing and medicinal tables. Tig welding sheet metal. Mig is one of the best ways to weld 20 gauge sheet metal. 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.

A smaller ire requires less heat to melt and at the same time does not heat the metal as much as you would with a thicker wire. To weld sheet metal with solid wires use electrode positive ep or reverse polarity. Mig welding is one of the simplest to use for welding. The majority of the sheet metal welding i ve done was with a 90 amp 110 volt welder.

Welding car panels if you are welding a large panel then the expansion of the metal during welding is likely to cause the panel to distort. 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. The most obvious advice for a mig welder is to use the smallest wire diameter as possible. Mig welding for thin metal.

Forget the larger 1 8 inch tungsten electrode and use a smaller one. It is an arc welding process that where you feed a solid wire electrode through a. 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. Mig welding was developed in the 1940 s and 60 years later the general principle is still very much the same.