does anyone have any recommendations in welding thin sheet aluminum?

ive been having trouble welding .40 aluminum together what do you recommend on gas and amps?

sorry im learning as i go along, been having a fun time but cant never seem to join the two without blowing through.

example: 2 peices .40 think, 90 degree corners, ive been blowing through them like nothing

 

thanks guys you guys have been great help...

 

Jason, that's not the kind of thing you want to learn on, that's for sure. That's a VERY hard weld to make, and the reason why you would generally see something like that riveted together.

Get some .125" material to practice on. I'm guessing this isn't really so much for practicing, so find a different way to attach the 2 pieces you're trying to weld together, cause it's not gonna happen and look half way decent.

 

What machine are you using?

 

Yeah, the machine would help. Generally speaking, if it has a pulse mode with h/f, then that would make life alot easier, as would a smaller tungsten,
and very few amps.
Filler rod size can kill a little job like that. For this you should have no bigger than .065, even smaller would be great.
Tony is right though, kinda like learning to walk in high heels...

 

i can weld great on .125. but ive been trying very hard on .40 which is like paper. now i dont know what machine im using at this moment but i believe its a lincoln.

steve s., larry dixons step brother is teaching me some trix. he can weld that .40 like it was nothing. it pisses me off! when i go in there and try on his step up, it comes out like crap. i dont know, i just wanted some input to how you guys would do it, im sure he will show me but he is very **** about telling me on the thin stuff.

my main problem is to start the puddle, before i can it starts to blow holes in everything.

 

that's some tough stuff to weld man. On the bright side it's going to teach you to drop your amps with your remote in sort of a tossed into the frying pan fashion.

Try drinking like 8 cups of coffee before welding so you can move fast enough.

you are doing OUTSIDE 90 deg corners right? with an open(V) fitup?

God I don't even know what amps I would use on that. It's so small and it will heat soak so fast the amps are going to vary so greatly from start to finish it's going to be a feel thing really.

 

are you talking about 18 gauge? 0.040? .40??

are you welding the inside corner or the outside?

 

outside! i gave up, steve s is the man it come out so clean!