Re: Notice it need an arc welder for power source? Buy A carbon


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Posted by Keith in Washington on Wednesday, May 24, 2006 at 8:30PM :

In Reply to: Re: Notice it need an arc welder for power source? Buy A carbon posted by Ken C. on Wednesday, May 24, 2006 at 6:34AM :

You can actually weld both sides of the flanged joint which will keep moisture out of the seam. In areas with less moisture you can weld one side of the joint and tack weld and fill the back side of the joint with seam sealer. That is what I will do with most of my joints even the ones on the floor as they will be covered with under coat. Those seams will have a seam sealer plus paint and the undercoat protecting them. That should be enough.

On the Willys that I am rebuilding all of the seams that overlap and are spot welded are rust free in the overlap area, even in the wheel wells. This is simply because their edges were covered/sealed with undercoat and water could not get to them. It is really interesting to hit the undercoat with a little heat from a heat gun then scrape it with a putty knife and see absolutly bright metal show up from below the undercoat. The Willys also spent most of its life in a road salt free environment which helped greatly.

I suspect that it would be possible to flange join two panels working on one side only, then grinding the flange off the back side when it has been totally welded on the front side. The only advantage is that with the flanged joint you can really clamp the two sides in place plus the extra metal of the flange will almost eliminate the burn through and reduce warpage due to the extra strength gained from the bend in the flanged area. However, nothing will help if you do not control your heat in welding.



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