02GF74
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 posted on 21/10/10 at 12:54 PM |
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using TIG to plug weld mild steel
anyone done this?
thinking of giving it a go - drill a 10 mm hole so that is makes a 5 mm hole (drill has conical end) in the lower piece, then apply torch, hopefully
get it up to temp then put in filler rod.
good/bad plan?
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bartonp
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| posted on 21/10/10 at 02:45 PM |
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You may find that, having thinned the lower sheet with the drill tip, it will be prone to blowing through.
10mm hole in top piece only, weld around the hole edge neatly, & optionally fill the centre last of all - done this before successfully. Deburr
the hole first...
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02GF74
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| posted on 21/10/10 at 02:59 PM |
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forgot to say, top piece is 3 mm and lower is 15 mm dia so no chance of blow through  ... probably won't be able to get enough heat in to melt
anything but was wondering if what I had in mind was sensible
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MakeEverything
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| posted on 21/10/10 at 07:10 PM |
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The most difficult part is adding the filler wire.
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
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Davey D
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| posted on 22/10/10 at 07:07 AM |
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you will struggle to get a good Tig plug weld through a 5mm hole in a piece of 3mm. I would just drill it out complately to 10mm. i dont know how far
out you protrude your tugsten, but when im tiggin normally, i sharpen my point to about 4mm long, and just have that much protruding from the ceramic
shroud. but if i was going to be plug wolding holes like that i would probarbly protrude the tungsten out about 7mm to make sure i can get the heat
into the bottom corner a bit easier 
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DIY Si
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| posted on 25/10/10 at 04:04 PM |
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What's wrong with the usual MIG method?
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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nick205
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| posted on 24/2/11 at 05:15 PM |
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quote:
Originally posted by DIY Si
What's wrong with the usual MIG method?
No mig welder I'm guessing?
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