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Posted by robb on March 30, 2007, 8:56 am
Please log in for more thread options thanks for reply,
I figured those cheapy machines would probably not handle this job but i
wanted to hear it from the proffesionals.
I was just looking for an excuse to buy a new toy (er um, i mean welder)
thanks for money saving tip
R
> I've seen alum rod for arc welders (DC +, iirc) that were awesome. Not
> pretty welds, but good penetration, fast, very little prep req'd. The
demo
> I saw (in a welding class) made it look almost idiot proof.
> Don't know the name of the rod I saw in action, but I'm sure good welding
> supply houses have a variety.
> Also forgot the amps req'd, but I think it was up there.
>
> Alum tig requires a lot of heat. My Miller Econotig, about $1300 ten
years
> ago, under ideal ideal conditions, *might* be able to join two pieces of
> 1/4", and is really comfortable only w/ 1/8. Alum just carries away so
much
> heat you need big amps.
>
> If deep penetration were not an issue, and with preheating, etc, my
machine
> might be able to handle your repair job. Real cheapie machines would
likely
> have that much less of a chance at success.
> --
> ------
> Mr. P.V.'d (formerly Droll Troll), Yonkers, NY
>
> Stop Corruption in Congress & Send the Ultimate Message:
> Absolutely Vote, but NOT for a Democrat or a Republican.
> Ending Corruption in Congress is the *Single Best Way*
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> The Solution is so simple--and inexpensive!
>
> entropic3.14decay at optonline2.718 dot net; remove pi and e to reply--ie,
> all d'numbuhs
>
> >i am trying to a repair a cast (injection molded ?) aluminum piece where
> > there is a big crack that needs to be closed then joined, imagine a 4" U
> > shaped chanel bent and one side with a 3' crack so the bend needs to be
> > straightened and the crack joined for strength. the thickness of
material
> > is
> > 3/16".
> >
> > i was researching how to weld aluminum on web
> > it seems you can do it all sorts of ways arc, gas, TIG, MIG
> >
> > as i understand to have best results one needs to consider
> >
> > 1. the grade of aluminum to be welded (how do i figure this out ?)
> > 2. pre-heat the area before welding
> > 3. avoid contaminates introduced into flux/flow
> > 4. thickness of material
> >
> > How does one determine the grade aluminum and is there a
prefered/better
> > method for joining in this particular application and will one of those
> > light duty harbor TIG or ARC welders handle the task ?
> >
> > thanks for any helpful advice.
> > R
> >
> >
> >
> >
>
>
>
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> there is a big crack that needs to be closed then joined, imagine a 4" U
> shaped chanel bent and one side with a 3' crack so the bend needs to be
> straightened and the crack joined for strength. the thickness of material
> is
> 3/16".
>
> i was researching how to weld aluminum on web
> it seems you can do it all sorts of ways arc, gas, TIG, MIG
>
> as i understand to have best results one needs to consider
>
> 1. the grade of aluminum to be welded (how do i figure this out ?)
> 2. pre-heat the area before welding
> 3. avoid contaminates introduced into flux/flow
> 4. thickness of material
>
> How does one determine the grade aluminum and is there a prefered/better
> method for joining in this particular application and will one of those
> light duty harbor TIG or ARC welders handle the task ?
>
> thanks for any helpful advice.
> R
>
>
>