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Old 11-07-2017, 12:49 PM
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Getting a little warp out of my door pannel

I'm doing a lot of patch panels on a 52 mercury pickup. I cut out a section of the door skin and tacked in a new piece of metal and I got a little warping of the old part of the door. I hear that you can heat the warp and cool it down quickly to take out the warp. Is this true, any advice?
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Don

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Old 11-07-2017, 01:30 PM
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Post some photos but if you are talking about warpage caused by a weld it's just the opposite! You need to thin the metal there planishing it with a dolly under the weld and a hammer on top. The welds already shrunk the metal a they cooled. And if you cooled the welds (very common mistake) you shrunk it more so more shrinking is NOT the answer.

And remember if you have warpage out away from the weld, those areas are not what caused the problem, it is right at the weld at the "HAZ" the "Heat Affected Zone" is where ALL the damage came from and where all the repair should be made.

Brian
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Old 11-07-2017, 02:16 PM
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I'll post some Pic's as soon as I get back to my shop. The welded section isn't warped it's the door panel that it's welded to. I'll send some picture soon.
Thanks
Don
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Old 11-07-2017, 02:27 PM
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Here is the photo's as promised. Hope this will help.
Thanks
Don
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Old 11-08-2017, 12:56 PM
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Don, that right there is a mess now, sir. A kind that is all too familiar. Degree of difficulty to fix will vary depending on the patch method used but is high no matter what. Butted or flanged? My first thought is to re-cut the two sides of the patch farthest from the corner, push out the pond, and try again having gained experience with warpage from this go around.

I hesitate to suggest it here now for you, but I have improved a situation such as this in the past by cleaning spots inside the skin for welds, just to apply heat. Which side of the steel is heated matters, and any thick coatings inside the door can affect heat behavior. Also the orientation of the door during welding can be a factor because heat goes up mostly, in the metal.
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Old 11-08-2017, 02:30 PM
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The door skin has some kind of coating right where the warp is, didnít think of that. We tried not to apply to much heat in the welding process but I must have over did it. Iím going to set both doors next to each other and figure out just where I need to go.
Thanks
Don
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