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Science Forum Index » Engineering - Joining (Welding) Forum » plug welding?
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| Grant Erwin |
 Posted: Wed Feb 07, 2007 10:29 pm |
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Can you plug weld with fluxcore wire? I do it all the time with hardwire MIG.
But I figure with fluxcore you'd probably trap flux all over the place unless
there's some special property that allows you to float the flux somehow.
GWE |
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| RJ |
| Posted: Wed Feb 07, 2007 10:47 pm |
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"Grant Erwin" <grant@NOSPAMkirkland.net> wrote in message
news:12sl2klgcf20t1e@corp.supernews.com...
Quote: Can you plug weld with fluxcore wire? I do it all the time with hardwire
MIG. But I figure with fluxcore you'd probably trap flux all over the
place unless there's some special property that allows you to float the
flux somehow.
GWE
Yes! |
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| R. Zimmerman |
| Posted: Wed Feb 07, 2007 11:31 pm |
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It depends on the size of your top plate hole. I have done some large
plugs that are holes around two inches in diameter through one inch plate.
In that case by the time you get back around the circle the flux is cold so
you would be running on top of cold flux which is risky.
If the hole is around an inch diameter I find I can keep things hot and
fluid and might only let things cool and chip if I have to build up over
half an inch.
The depth of glass/flux you are welding through will indicate to you that
it is time to stop and chip. I often weld as much as I can then go to
another hole in order to let the first hole cool.
I haven't found it much different than filling with E 7018.
Randy
"Grant Erwin" <grant@NOSPAMkirkland.net> wrote in message
news:12sl2klgcf20t1e@corp.supernews.com...
Can you plug weld with fluxcore wire? I do it all the time with hardwire
MIG.
But I figure with fluxcore you'd probably trap flux all over the place
unless
there's some special property that allows you to float the flux somehow.
GWE |
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| Nick Mueller |
| Posted: Thu Feb 08, 2007 5:47 am |
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Grant Erwin wrote:
Quote: Can you plug weld with fluxcore wire?
Yes, if you could do it with a stick welder.
Nick
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| steamer |
| Posted: Thu Feb 08, 2007 5:18 pm |
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--Silly me; what's plug welding?
--
"Steamboat Ed" Haas : Why hasn't a vampire hacker
Hacking the Trailing Edge! : invented carbonated blood?
www.nmpproducts.com
---Decks a-wash in a sea of words--- |
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| Grant Erwin |
| Posted: Thu Feb 08, 2007 5:39 pm |
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steamer wrote:
Quote: --Silly me; what's plug welding?
I'll answer with an example. Take a piece of 1/8x1/2" strip HRS and punch a
5/16" hole in it. Clamp this strip flat down onto a piece of steel. You can now
look down through the hole, OK?
Take your MIG welder and aim it right dead center in the hole and start welding.
Immediately start spiraling out towards the edges and keep welding with a
circular motion until the weld pool has a nice convex dome shape, and then stop.
Your strip is now plug welded to the steel beneath it.
The trick to MIG plug welding is to start in the middle of the hole
I have never learned how to plug weld with stick - anyone want to describe the
procedure?
GWE |
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| John Miller |
| Posted: Thu Feb 08, 2007 5:50 pm |
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--
J Miller
"steamer" <steamer@sonic.net> wrote in message
news:45cb938f$0$80090$742ec2ed@news.sonic.net...
Quote: --Silly me; what's plug welding?
--
"Steamboat Ed" Haas : Why hasn't a vampire hacker
Hacking the Trailing Edge! : invented carbonated blood?
www.nmpproducts.com
---Decks a-wash in a sea of words---
It's a good way to fasten metal screen to a metal frame. Punch or drill
holes in a separate strip of metal then sandwich the screen between the
frame and metal strip, clamp well and plug weld the holes.
John Miller |
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| Nick Mueller |
| Posted: Thu Feb 08, 2007 7:23 pm |
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Grant Erwin wrote:
Quote: I have never learned how to plug weld with stick - anyone want to describe
the procedure?
It's about the same. But you'll have trouble with the slag. Small holes like
the 5/16 won't work well. Better with 15mm diameter. And the deeper the
hole, the more trouble you get. You need an rutil-cellulose stick where you
can weld through the slag (a bit).
A note the plug welding with MIG:
With sheet metal, you don't even have to drill a hole. It will burn through
0.8mm (car body) good enough. The weld looks a bit ugly. But that procedure
is reccommended.
Nick
--
***********************************
*** Available now in NZ and AUS ***
***********************************
<http://www.yadro.de> |
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| R. Zimmerman |
| Posted: Thu Feb 08, 2007 9:36 pm |
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The plug welding I often do is with heavy material such as over half inch
thick. On half inch plate you might punch a hole around one inch or
sometimes burn two inch holes or slots.
The half inch plate is set on top of some other plate or the top flange of
a beam.
On heavy stuff you really are running a fillet weld around the inside wall
of the hole. In some cases the print calls for simply a fillet weld but in
other cases the hole is filled up to level for cosmetic reasons.
For small plug welds it is just a 3/8 or 1/2 inch hole in quarter plate.
No matter what process you use it is important that you melt the material at
the bottom of the hole as well as fusing into the walls. You could
conceivably build up a hole without properly melting into the walls. I like
to move around the bottom of the hole in a circle and see my arc cutting
onto the walls of the hole.
Randy
"steamer" <steamer@sonic.net> wrote in message
news:45cb938f$0$80090$742ec2ed@news.sonic.net...
--Silly me; what's plug welding?
--
"Steamboat Ed" Haas : Why hasn't a vampire hacker
Hacking the Trailing Edge! : invented carbonated blood?
www.nmpproducts.com
---Decks a-wash in a sea of words--- |
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| steamer |
| Posted: Fri Feb 09, 2007 1:43 pm |
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--Gotcha; yeah I do it all the time with TIG. Haven't tried it with
MIG yet.. Never knew the proper name for the process; thanks!
--
"Steamboat Ed" Haas : Why hasn't a vampire hacker
Hacking the Trailing Edge! : invented carbonated blood?
www.nmpproducts.com
---Decks a-wash in a sea of words--- |
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| Nick Mueller |
| Posted: Sat Feb 10, 2007 7:24 am |
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Nick Mueller wrote:
Quote: A note the plug welding with MIG:
And another note:
If the part with the hole is thick, I often countersink it (nearly down to
the bottom, depending on thickness). Makes it a *lot* easier to weld and
you don't have to watch for melting the upper part. It gets so easily
melted that you can concentrate on the lower part.
Nick
--
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*** Available now in NZ and AUS ***
***********************************
<http://www.yadro.de> |
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| William Bagwell |
| Posted: Sun Feb 11, 2007 8:27 pm |
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On 09 Feb 2007 17:43:09 GMT, steamer <steamer@sonic.net> wrote:
Quote: --Gotcha; yeah I do it all the time with TIG. Haven't tried it with
MIG yet.. Never knew the proper name for the process; thanks!
Also known as rosette welding, though this term is far less common.
--
William |
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