How To Spot Weld Sheet Metal With Mig

Im installing floor pans in my 86 cutlass and i have to add some metal to the pan.

How to spot weld sheet metal with mig.

This process is fairly simple but there are a few tools and tips that help you get really nice welds that closely resemble and original spot weld. Applicable 10 off coupon code. For mig welding sheet metal it is often recommended to use an electrode wire of the smallest diameter to prevent burn through and warping. The two most commonly used methods for welding sheet metal are mig and tig methods.

Keep the stick out short stickout of your mig wire is important when welding any type of metal but especially sheet metal. The gap is to compensate for expansion when the metal gets hot. Test fit the panel until only an even 1 16 gap is left around the patch. This means the extra wire causes the voltage to drop by the time it actually gets to the surface and strikes an arc.

Buy the kit here. This enables you to take control over the. The main reason to use a smaller diameter wire is that it takes less heat for melting and hence the metal around the weld is not heated to a very great extent. This drops the voltage and heat of the weld arc and causes the welds to sit proud no penetration on top of the metal.

This small gap will be filled in by the weld puddle. Don t forget to mark the. Tig welding sheet metal. You can than take a drill or a metal punch to make holes in the top layer of the metal.

This method is favorable as it leaves room. Below we show you the process for making a spot weld with your mig welder. September 10 weldpros mig welding for sheet metal. Thicker sheet might require a slightly larger hole size.

7 5mm is a reasonably good hole size for 0 8 or 1 0mm sheet. However in some cases spot welding is also utilized. Forget the larger 1 8 inch tungsten electrode and use a smaller one. I like to try and center the weld in the flange or weld seam.

Holding the tip too far from the surface will cause the wire to have to come out too far to touch the metal. Then clamp this sheet onto the back sheet. Don t attempt to weld thin materials like sheet metal with flux cored wires which put more heat into the base metal. Start off by drilling 7 5mm holes in the front sheet of metal at a spacing of normally 25mm to 40mm or whatever the original spot weld spacing was.

So while i was at it i thought i show you some ways of spot welding and bu. To weld sheet metal with solid wires use electrode positive ep or reverse polarity.