How To Spot Weld Sheet Metal With Mig

Don t attempt to weld thin materials like sheet metal with flux cored wires which put more heat into the base metal.

How to spot weld sheet metal with mig.

This enables you to take control over the. For mig welding sheet metal it is often recommended to use an electrode wire of the smallest diameter to prevent burn through and warping. Applicable 10 off coupon code. To weld sheet metal with solid wires use electrode positive ep or reverse polarity.

Don t forget to mark the. Mig welding is one of the most appropriate methods used for sheet metal. 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. Forget the larger 1 8 inch tungsten electrode and use a smaller one.

Start by marking out even spacing of where you want your spot or plug welds on the metal. I like to try and center the weld in the flange or weld seam. Buy the kit here. Holding the tip too far from the surface will cause the wire to have to come out too far to touch the metal.

The two most commonly used methods for welding sheet metal are mig and tig methods. 7 5mm is a reasonably good hole size for 0 8 or 1 0mm sheet. Thicker sheet might require a slightly larger hole size. Then clamp this sheet onto the back sheet.

This means the extra wire causes the voltage to drop by the time it actually gets to the surface and strikes an arc. Tig welding sheet metal. Keep the stick out short stickout of your mig wire is important when welding any type of metal but especially sheet metal. Below we show you the process for making a spot weld with your mig welder.

You can than take a drill or a metal punch to make holes in the top layer of the 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. This drops the voltage and heat of the weld arc and causes the welds to sit proud no penetration on top of the metal. 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.