Spot Welding Wire To Sheet Metal

Below we show you the process for making a spot weld with your mig welder.

Spot welding wire to sheet metal. Spot welding or resistance spot welding is a type of electric resistance welding used to weld various sheet metal products through a process in which contacting metal surface points are joined by the heat obtained from resistance to electric current. Buy the kit here. For thinner gauge sheet metal like 18 or 20 gauge we suggest 023 6mm wire in your mig welder. Vehicle manufacturers use resistance spot welding in the factory.

The process uses two shaped copper alloy electrodes to concentrate welding current into a small spot and to simultaneously clamp the sheets. Start by marking out even spacing of where you want your spot or plug welds on the metal. Short bursts or tacks will help you gain more control and adjust easily. Im installing floor pans in my 86 cutlass and i have to add some metal to the pan.

You can than take a drill or a metal punch to make holes in the top layer of the metal. Don t forget to mark. With these materials use a tri mix gas 90 helium 8 argon and 2 co 2. These joints created by resistance spot welding form a button or fused nugget resistance spot welds are found typically on flanges staggered in a single row of consecutive welds.

When welding 304 stainless steel er308 er308l and er308lsi wires are compatible but for welding 316l stainless you need a 316l wire. A form of resistance welding spot welding is one of the oldest welding processes whereby two or more sheets of metal are welded together without the use of any filler material. This means the. While joining sheet metal is the most common use for the process resistance welding rw equipment actually can be used for a large variety of joining and heat treating projects some of which are not so well known.

While wire feed welding sheet metal go for short bursts of welding instead of a going on a long bead. The process involves applying pressure and heat to the weld area using shaped alloy copper electrodes which convey an electrical current through the weld pieces. For sheet metal i use ine welding wire and it is just as good as their flux cored wire if you want you can grab one here. So while i was at it i thought i show you some ways of spot welding and bu.

Holding the tip too far from the surface will cause the wire to have to come out too far to touch the metal. To most manufacturers spot welding is the most economical way to join two pieces of sheet metal. I like to try and center the weld in the flange or weld seam.