How To Spot Weld Sheet Metal With Mig

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.

How to spot weld sheet metal with mig.

The gap is to compensate for expansion when the metal gets hot. This method is favorable as it leaves room. Applicable 10 off coupon code. Tig welding sheet 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. To weld sheet metal with solid wires use electrode positive ep or reverse polarity. Holding the tip too far from the surface will cause the wire to have to come out too far to touch the metal. Keep the stick out short stickout of your mig wire is important when welding any type of metal but especially sheet metal.

This enables you to take control over the. 7 5mm is a reasonably good hole size for 0 8 or 1 0mm sheet. However in some cases spot welding is also utilized. Start by marking out even spacing of where you want your spot or plug welds on the metal.

Below we show you the process for making a spot weld with your mig welder. This drops the voltage and heat of the weld arc and causes the welds to sit proud no penetration on top of the metal. You can than take a drill or a metal punch to make holes in the top layer of the metal. Test fit the panel until only an even 1 16 gap is left around the patch.

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. Then clamp this sheet onto the back sheet. Mig welding is one of the most appropriate methods used for sheet metal. When mig welding a patch panel onto your car you need to leave a small gap between the patch panel and the original metal.

Don t attempt to weld thin materials like sheet metal with flux cored wires which put more heat into the base metal. Im installing floor pans in my 86 cutlass and i have to add some metal to the pan. So while i was at it i thought i show you some ways of spot welding and bu. September 10 weldpros mig welding for sheet metal.

The two most commonly used methods for welding sheet metal are mig and tig methods. Forget the larger 1 8 inch tungsten electrode and use a smaller one. Thicker sheet might require a slightly larger hole size. Don t forget to mark the.

I like to try and center the weld in the flange or weld seam. This means the extra wire causes the voltage to drop by the time it actually gets to the surface and strikes an arc.