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Posted by on May 24, 2006, 5:59 pm
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I'm trying to understand the process behind welding aluminum.
I think I understand the physical basis for AC TIG on aluminum,
the ac tries to reduce/remove the oxide to give a clean weld.
The welder manually adds filler rod and all is well;-)
My real question is how does aluminum wire feed welding work?
Do you still use AC? If you don't use AC how do you keep the aluminum oxide
off the weld?
What is typically used to weld Aluminum in a production environment?
How are large things like welded aluminum boats constructed?
Can some one reccomend a good background article on the basics of the different
welding technologies?
Paul
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Posted by Kryptoknight on May 24, 2006, 7:03 pm
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you MIG aluminum with a spool gun. the wire is not stiff enough to push all
the way through a MIG lead (maybe 060 wire is, but large wire is not so
common) and done with DC. the metal needs to be real clean to start with.
the IG in "mig" helps shield the al, and a procedure for moving fast enough
is learned with experience. if you dont move fast enough the al ahead of
your path may get hot enough to start oxidizing....
AC gives some other adjustable chracteristics, such penetration or cleaning
effects.
i'm just a hobby weldor, so others here may lend some more "welding tech
talk" to what i have said.
> I'm trying to understand the process behind welding aluminum.
>
> I think I understand the physical basis for AC TIG on aluminum,
> the ac tries to reduce/remove the oxide to give a clean weld.
> The welder manually adds filler rod and all is well;-)
>
> My real question is how does aluminum wire feed welding work?
> Do you still use AC? If you don't use AC how do you keep the aluminum
> oxide
> off the weld?
>
> What is typically used to weld Aluminum in a production environment?
>
>
> How are large things like welded aluminum boats constructed?
>
>
> Can some one reccomend a good background article on the basics of the
> different welding technologies?
>
>
> Paul
>
>
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Posted by on May 24, 2006, 11:28 pm
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pbreed@netburner.com wrote:
> My real question is how does aluminum wire feed welding work?
> Do you still use AC? If you don't use AC how do you keep the aluminum oxide
> off the weld?
>
> What is typically used to weld Aluminum in a production environment?
>
>
> How are large things like welded aluminum boats constructed?
>
>
> Can some one reccomend a good background article on the basics of the
different welding technologies?
>
>
> Paul
I am not an expert, don't even play one on TV. But you weld aluminum
with DC when using wire feed. With TIG you don't want to use DC with
electrode positive, because it gets the tungsten too hot. But it can
be done. But with wire feed getting the wire too hot is not a problem.
MIG is usually used to weld aluminum boats. In a production
environment, it might be TIG or MIG. Depends more on what is being
welded.
Dan
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Posted by AMW on May 25, 2006, 7:40 am
Please log in for more thread options Here you will find general knowledge on TIG and MIG (GMAW) welding
http://www.millerwelds.com/education/bookspamphlets.html
other pages
http://www.google.com/search?hl=en&q=mig+aluminum&btnG=Google+Search
Richard
> I'm trying to understand the process behind welding aluminum.
>
> I think I understand the physical basis for AC TIG on aluminum,
> the ac tries to reduce/remove the oxide to give a clean weld.
> The welder manually adds filler rod and all is well;-)
>
> My real question is how does aluminum wire feed welding work?
> Do you still use AC? If you don't use AC how do you keep the aluminum
> oxide
> off the weld?
>
> What is typically used to weld Aluminum in a production environment?
>
>
> How are large things like welded aluminum boats constructed?
>
>
> Can some one reccomend a good background article on the basics of the
> different welding technologies?
>
>
> Paul
>
>
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Posted by R. Zimmerman on May 25, 2006, 8:29 am
Please log in for more thread options Aluminum boats are almost exclusively done with MIG. TIG is too slow.
Pulsed current is very popular for aluminum boats because it leave a
cleaner weld ( no spatter) and vertical welding is easier.
With proper equipment and skill even thin material is welded with wire
feed... The thinnest I saw was a repair on a large hovercraft with 2mm
damaged skin. It was repaired with MIG in pulse mode. A friend of mine had
to qualify on this flat, vertical, and overhead. It was way beyond my skill
level.
Randy
I'm trying to understand the process behind welding aluminum.
I think I understand the physical basis for AC TIG on aluminum,
the ac tries to reduce/remove the oxide to give a clean weld.
The welder manually adds filler rod and all is well;-)
My real question is how does aluminum wire feed welding work?
Do you still use AC? If you don't use AC how do you keep the aluminum oxide
off the weld?
What is typically used to weld Aluminum in a production environment?
How are large things like welded aluminum boats constructed?
Can some one reccomend a good background article on the basics of the
different welding technologies?
Paul
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>
> I think I understand the physical basis for AC TIG on aluminum,
> the ac tries to reduce/remove the oxide to give a clean weld.
> The welder manually adds filler rod and all is well;-)
>
> My real question is how does aluminum wire feed welding work?
> Do you still use AC? If you don't use AC how do you keep the aluminum
> oxide
> off the weld?
>
> What is typically used to weld Aluminum in a production environment?
>
>
> How are large things like welded aluminum boats constructed?
>
>
> Can some one reccomend a good background article on the basics of the
> different welding technologies?
>
>
> Paul
>
>