I am very new to welding. I have a MIG welder and have no trouble joining two metals of equal thickness. However, I need to weld 1/20 sheet to a 3/8 beam and am having trouble. I either get poor penetration or I blow through the thin sheet. What is the best way to tackle this?Is this where I use a thick copper heatsink under the thinner sheet? The sheet is corrugated so it is diffucult to press a heatsink against it.Any tips are greatly appreciated. Thanks!
where do you live? snowy winters? get the truck. florida or texas? keep the GTO.
You might want to see about using a resistance welding rig: Your existing power supply should support this so the cost of the rollers, clamps, etc, would not be all that exorbitant.
for the heat sink that wont fit is it possible to beat the corrugated steel flat after all it is thin, then do not weld one continuous bead. tack it stop and do that until it is done. Also you could use tech screws or self tapping screws(they are the same thing) this is a perfect time to use them this is what they are made for remember you can use brackets to allow you to put screw in at different angles I.E. 90 degree brackets like what you use on a cabinent. but if you must weld it, then you should maneuver the work piece to a flat position which will aid in welding unless this in not possible, another tip is fold the thin stuff over to make it thicker. Is it cold where you leave if you leave the thin stuff out to get real cold and heat the thick stuff up like put it in a garage infront of a heater that works too (though I have only done it like twice on very small bench top jobs with a tig) or send it to me hell I'll do if for you
