How To Spot Weld Sheet Metal With Mig

Tig welding sheet metal.

How to spot weld sheet metal with mig.

To weld sheet metal with solid wires use electrode positive ep or reverse polarity. The two most commonly used methods for welding sheet metal are mig and tig methods. Thicker sheet might require a slightly larger hole size. Buy the kit here.

Don t attempt to weld thin materials like sheet metal with flux cored wires which put more heat into the base metal. This method is favorable as it leaves room. For mig welding sheet metal it is often recommended to use an electrode wire of the smallest diameter to prevent burn through and warping. Holding the tip too far from the surface will cause the wire to have to come out too far to touch the metal.

I like to try and center the weld in the flange or weld seam. Forget the larger 1 8 inch tungsten electrode and use a smaller one. 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. 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.

Then clamp this sheet onto the back sheet. Keep the stick out short stickout of your mig wire is important when welding any type of metal but especially sheet metal. Start by marking out even spacing of where you want your spot or plug welds on the metal. This enables you to take control over the.

September 10 weldpros mig welding for sheet metal. Don t forget to mark the. This means the extra wire causes the voltage to drop by the time it actually gets to the surface and strikes an arc. 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.

7 5mm is a reasonably good hole size for 0 8 or 1 0mm sheet. Below we show you the process for making a spot weld with your mig welder. However in some cases spot welding is also utilized. Mig welding is one of the most appropriate methods used for sheet metal.