I tried welding some aluminum tube last night without any luck. For one
it was the first time I ever tried AL welding with the exception of when
the machine was demoed to me years ago. I am welding 1 3/4" 0.065"
wall 6061 T6 tubbing using a Lincon Square wave TIG machine. Problems
seam to be.
1) I am usually unable to tell when the metal is molten, It doesnt glow,
dance flow or do anything it just stays there until you touch it with a
rod, at which point you polk a big hole in it.
2) OK so I sort of think I know when its molten but getting it to flow
seems impossable. It seams like I need more currernt but I started at 30
Amps and went to 70 Amps could I possibly need more to weld 0.065 wall tube.
3) It also seams like the metal does not want to fuse together but just
stay to itself. Filler metal tends to just form a ball and stay on top.
4) I'm thinking maybe its dirty but I cleaned it with a scotch bright
pad on a angle grinder. I havent cleaned the inside of the tube so I
will try that next.
I was last using about 70 amps AC TIG mode, Gas was Argon as high as 20
CFH. filler 3/32 4043. I dont have anything thinner at the moment. I was
using 1/16" 2% Thoriated tungsten flat and chamfered tip.
Can anyone post some tips and a recomended setup.
14 years ago