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  #11  
Old 12-31-2017, 08:59 AM
John-G John-G is offline
 
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Bob -

Just had a thought which I feel may be an eloquent non-adhesive solution for holding the aluminum pieces together for welding.

You mentioned the pieces you want to weld have flanges .... my suggestion is to get a handful of strong Alnico magnets and place one magnet on the flange of the part to be welded and a second magnet on the outer side of the aluminum it is to be welded onto. The force of the magnets pulling towards one another should keep the two pieces held snugly together while a couple of tack welds are laid down.

Sounds good in theory
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  #12  
Old 12-31-2017, 11:16 AM
ty1295 ty1295 is offline
 
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I weld almost daily, can't say anymore about how important aluminum is to be clean.

I would mark it best you can, whoever you have weld it take it to them to tack it, bring it back to verify it is still good. 2 steps but is much better than the 2nd step being cut it all back apart.
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  #13  
Old 12-31-2017, 12:38 PM
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N941WR N941WR is offline
 
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Why do you want to weld aluminum tubing?
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  #14  
Old 12-31-2017, 07:12 PM
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hgerhardt hgerhardt is offline
 
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Sounds like a great excuse to buy that TIG welder you wanted for xmas but didn't get.

After years of talking about it, I finally bought a Lincoln TIG 200 at Sun-n-Fun last time at the Lincoln booth for around $1250 IIRC with no tax and free shipping. Great little machine.

Last edited by hgerhardt : 12-31-2017 at 07:14 PM.
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  #15  
Old 01-01-2018, 07:43 AM
TS Flightlines TS Flightlines is offline
 
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Back in my industrial days, we aluminum brazed 3003 tubing for automotive A/C fittings for making hoses. Worked well.

Tom
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