Blowing Holes In Sheet Metal Flux Welding

If it s blowing through quickly then maybe the power is set too high on the welder.

Blowing holes in sheet metal flux welding. Am i just doing it wrong. 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. This works as a backing bar obviously and also as a chill strip that helps conduct heat away so you don t blow holes in it. Andy gives helpful insights and tips to mig weld thin sheet metal.

On sheet metal you always stitch weld to prevent blowing holes and warping the metal from overheating. Use thin wire one big mistake we see with beginners is using welding wire that is too thick for the metal they re welding. Keep the stick out short stickout of your mig wire is important when welding any type of metal but especially sheet. Stick welding burning holes through thin metal 05 15 2011 10 32 am.

Its also important to have it very clean i use a wire wheel etc to clean prior to welding. If you are butt welding try to minimise the gap between the two sheets. I have a welding addiction the only stupid question is the one you didn t ask. 2mm is the thinnest rod i have available i am in brazil.

This machine is one of the most basic welders available on the market today. If your welding wire is too thick it will take more heat to melt the wire than the substrate and can make it even more prone to blowing holes in the panel. Reducing the power and wire speed might help although the metal needs to be completely shiny and clean for low power stuff to work at all. To prevent lack of fusion the failure of the weld metal to fuse completely with the base metal or the preceding weld bead in multi pass applications.

To fix that hole and to do any more welding with out blowing through you could clamp a copper backing bar to the backside of the weld. That way you dont erode the metal away. Try going for a wire of 023 inches when welding sheet metal. I keep blowing through my thin sheet.

Basic guide to flux cored arc welding. Its great on thicker material but on thin stuff 50 of the time cause me to blow a hole through it. Hello and welcome to the slo makerspace guide to flux cored arc welding. This instructable is intended to teach you how to use the lincoln weld pak hd flux cored arc welder.

For thinner gauge sheet metal like 18 or 20 gauge we suggest 023 6mm wire in your mig welder.