Correcting for Warp -
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Unread 10-04-2010, 01:52 PM   #1
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1986 CJ7 
Join Date: Nov 2008
Location: Anacortes, WA
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Correcting for Warp

I am in the process of fixing the PO's overzealous hole cutting on my CJ-7 dash. The voltmeter and oil pressure gauge holes were cut too big. Ive removed the dash and vut out the affected section and welded in a replacement. I thought I was very careful, had my MIG welder turned all the way down, and tried to balance the heat by welding very short stretches (1/2") bouncing around the perimiter of the weld. I still ended up with what I think is shrinkage that has pulled the dash panel into a bit of a bow.

I am at a loss for how to correct it. Ive searched the site and couldnt find any ideas. Am I screwed? I appreciate any help you all can lend.

Last edited by Sproocket; 10-04-2010 at 06:51 PM.. Reason: Image didnt show.
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Unread 10-05-2010, 12:32 AM   #2
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2007 JK Wrangler 
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Location: Bakersfield, California
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I hate warping it just happened on my bumper Im making and I had to drive a forklift over it to bend it back the other way. Only way I know of is bending it back or using a hammer. I think there is a way to heat it up with a torch somehow..... Much easier to predict the warp and compensate by clamping and such.
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Unread 10-05-2010, 03:16 AM   #3
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1995 YJ Wrangler 
Join Date: Nov 2006
Location: Millen Area,Georgia
Posts: 3,357
About the only way i can think of to correct the warpage would be to cut it out again and start over,but this time only weld the thing with a spot tack n move type of method,don't weld it a 1/2" or even a 1/4" at a time..just tack welds,...tack a spot,move to the complete opposite side of that tack and tack there..etc....about every 4 corners opposite from each other let the whole thing cool for a few minutes,then continue again...and NEVER put water or anything on it to cool it off,,this will make it warp even worse.
Clamp the whole thing down in a way before welding it up so that it doesn't have a chance to pull,then after done welding leave it clamped there untill cool to the touch.

It can be corrected with some heat,or dolly hammering, but that's complicated to do correctly with out making it even worse,go to a few metal shaping websites or body shop websites and ask the pros there,they can help you with trying to straighten it out as is without starting over,they've helped me out with quite a few issues welding in body replacement panels with minimum warpage.
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Unread 10-05-2010, 06:22 AM   #4
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1980 CJ5 
Join Date: Nov 2002
Location: Newport News, VA
Posts: 12,280
I was just reading a thread in the CJ forum about a "metal shrinking" disk for a grinder. The video link showed a guy running the disk on high spots and then quenching with water to shrink the metal. He combined that with a "slap spoon" and "hammer/dolly" to really smooth the metal. Keep in mind, these were small bumps.. not sure how the disk would work on a large bowed area.
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Unread 10-05-2010, 06:46 PM   #5
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1986 CJ7 
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Thanks everyone.
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welding patch

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