Welding Tips and Tricks

LtBadd wrote: AndersK, you snapped it off before starting the weld!!

So you really think I can weld?

It actually needed 2 or three bends to snap off

Hello all again.

Trying some overlaps on thin aluminum 1.5mm. I don´t know why but seems to be much more difficult then a butt joint using the same thickness. Probably the weld is good but it is VERY ugly. What i´m doing wrong?

By the way... 60A for the bead.

Thanks all.

the sheets need to be clamped as so the edge does not lift or warp.
use a backer and tack often.
if the edge lifts heat gets under the edge and melts it away.
hope this help some
craig

No clamps was used. And just a few tacks 3 or 4 in a 35 cm extension. Next time I´ll double the tacks and buy some long clamps. You are sure a did a lot of deviations to refill the burned edges.

Thanks.

No too bad, just need more time to maintain consistent speed.

When welding long flat surfaces I use a small piece of fire blanket that I fold to about 4 layers. Rest your palm at it and you won't get burned and it helps you slide along easier.

AndersK, good ideia.

And what about "Tig Finger"? Anyone knows the material used?

Edited...

I did not see any penetration on the back side of aluminum. Using 60A and was already very difficult to avoid burning the edges.

Is this right?

Thanks.