Filling trim holes

More of an art than a science - discuss metalworking and welding here.



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PostPosted: Mon Aug 15, 2016 10:29 pm
Im working on a 66 Dodge Dart. Its a 270 model and it had a section of chrome trim that started at the back and ran all the way to the front. Each piece was mounted with clips that fit into holes that are about 3/16" to 1/4" round. I had originally punched small circles of body metal and glued them into the holes using the 3m 8115 bond. Now Im being told that thats not a good decision. Some say to weld each hole shut but thats probably about 60 plus holes and I dont want to werp the panels with heat. So my question is what is the best way to fill these holes as I am eliminating all side trim.
Thanks Rodney



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PostPosted: Wed Aug 17, 2016 2:28 am
use mig with .023-.024 wire, if you can, back up the hole with a piece of copper, jump around , and you won`t warp



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PostPosted: Wed Aug 17, 2016 8:45 pm
You cannot weld without shrinkage, or warpage as many call it. Heat shrinks metal....period. It cannot be avoided but only controlled by proper technique. Planishing a weld after smoothing both sides will stretch the HAZ area and result in a surface that requires very little filler or any at all. Other sites besides 101 will provide one with advanced techniques.



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PostPosted: Thu Aug 18, 2016 5:21 am
LOL



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PostPosted: Thu Aug 18, 2016 10:31 pm
I use the Method Scott is Talking about

Norunz
You can use a Heat sink behind the metal like you say but its a band aid or a Poor mans Training wheels that results in a COLD weld which will crack when Planishing.
If your running a long bead all at once and going to keep a lot of heat going fine but if your just doing a hole here and there I wouldn't.

Seriously

If you want some good advice use some Silicon Bronze filler rod and a gas or Tig to weld them up. Or if you really have to use a Mig use it with Easy grind wire by ESAB to weld it, easier to grind easier to planish out.
Dennis B.
A&P Mechanic, FCC General radio Telephone Operator
Line Maintenance A&P Mechanic and MOC Tech specialist.

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