| [ Total Views: 1241 | Total Replies: 6 | Thread Id: 95593 ] |
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 Special Air Service
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Chief "Gunna"
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| posted on February 28th, 2012 at 07:45 PM |
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Quenching out when Mig Welding
Doing some rust repairs on the beetle (rear guard mounting areas), & I want to know if I need to be quenching out my welds (MIG) with water as I
go to control distortion. I used to do this back in the days when I only had OXY to work with.
I havent got good enough access to the back of the panel to allow me to get a dolly behind it to hammer on.
Any help appreciated.
Cheers
Brendan
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5lam
A.k.a.: Dave
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| posted on March 14th, 2012 at 03:42 PM |
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Tack on tack is the best method. Using water will cause warping also. Just take it slow, and allow the metal to cool after half a dozen tacks or so,
depending on the size of the area.
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 helbus
A.k.a.: Pete S
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| posted on March 14th, 2012 at 08:30 PM |
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I use air to cool welds, as the water is too quick and hardens the weld too much. I metal finish most of my joins, so I use every advantage I can to
make the job work.
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snitz
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| posted on March 14th, 2012 at 08:37 PM |
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Yep..blow with an air gun between welds..
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Special Air Service
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Chief "Gunna"
Posts: 1769
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Registered: October 4th, 2004
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Location: Old Bar , Mid North Coast , NSW
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| posted on March 25th, 2012 at 09:36 PM |
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Thanks gents, I think my problems were trying to get to much welded in one go & tacks too far apart. getting to much heat in. Will give the air a
try.
Cheers
Brendan
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helbus
A.k.a.: Pete S
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| posted on March 25th, 2012 at 09:41 PM |
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Tack every cm, and then sand the tacks down to almost level with the surrounding panel.
Then do the welds 1 cm at a time with the air gun to cool. It takes about 20 seconds per cm, so you are looking at 3cm per minute.
I have done roof chops areas that have taken 6 hours just to weld the roof skin.
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Special Air Service
Custom Title Time!
Chief "Gunna"
Posts: 1769
Threads: 210
Registered: October 4th, 2004
Member Is Offline
Location: Old Bar , Mid North Coast , NSW
Theme: UltimaBB Pro Blue ( Default )
Mood: In desperate need of a decent sleep
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| posted on March 30th, 2012 at 12:53 PM |
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Thanks Pete, been tacking way too far apart. probably about 3cm. tried the air method the other day & definetely helped. I'm getting
improvements as I go, so thanks to all. Will post up some pics of my progress shortly.
Cheers
Brendan
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