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Old 05-19-2022, 01:27 AM
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CaddmannQ CaddmannQ is offline
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Default I am taking Bets here…

I bought this trailer fender from tractor supply company but it is 4 inches wider than what I need.

I’m gonna cut a four-inch strip out of the middle, tack it back together with the strip underneath and seam weld it back together.

I do not know if my nibbler can cut this so I may end up doing it with a cut off wheel in the angle head grinder.

But here’s my quandry, what’s gonna happen to this fender from entrained stresses when I split it down the middle.

Is it going to stay straight?

Is it going to turn into two opposite hand 3D bananas?

Is it gonna go all out of round at the cut edge, while the flanged edge stays round ?

Something else?
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  #2  
Old 05-19-2022, 05:44 AM
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I think it will distort a bit. Depends on how hot you get it if you use the cut off wheel. You will get to practice your blacksmithing skills to get it back into shape, but it should conform back easily with enough clamps.


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Old 05-19-2022, 10:12 AM
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I don’t think it will move much, the outer radii will have enough strength to hold the curve.


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Old 05-19-2022, 01:23 PM
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Once I cut 4 inches out of the middle I will have two 2 inch edges to weld back together. That fender has a 1” radius so there’s only gonna be about one inch of flat metal.

I think I’m gonna need a leather body bag, a shrinking hammer, and an English wheel.
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Old 05-19-2022, 01:41 PM
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It will be fine. welding will be the issue.
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Old 05-19-2022, 03:09 PM
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I don’t recall what you have for welding. If you get it all lined up, and weld and cool in small increments, it should keep distortion to a minimum.

Heck, folks figured out how to do it with brazing and O/A back in the day.


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Old 05-19-2022, 10:20 PM
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Quote:
Originally Posted by CaddmannQ View Post

I think I’m gonna need a leather body bag, a shrinking hammer, and an English wheel.
I think this is the secret message encoded in the project

Better to procure everything you possibly may need before starting, especially if you have any visible floor space.
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Old 05-20-2022, 12:06 AM
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Old 05-20-2022, 07:23 AM
threepiece threepiece is offline
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The question is what is it going to do after cutting?

Since all metals are not equal it is difficult to predict. Even parts made from the same sheet will have a different outcome if the orientation is different.

Experience you may have had in the past may not apply in the future.
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Old 05-20-2022, 02:42 PM
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Quote:
Originally Posted by threepiece View Post
Experience you may have had in the past may not apply in the future.
Amen, brother.
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