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  #1441  
Old 12-29-2019, 02:43 PM
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Jack 1957 Jack 1957 is offline
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When I was making the buck for the rear fenders, I was taking most of the dimensions from the original fenders. They were completely rusted away at the front lower corners so I had to guess what shape and size they were. I guessed pretty close, but not close enough. The front of the skirts are about 3/8 to 1/2" too long. No good, so I cut away the reinforcement frame on the leading edge and a little of the skin so I can replace it with a new piece.


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I made a new reinforcement from 1" angle and added a boss for the Dzus fastener.


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I started making the new piece by stretching a little with a hammer and shot bag to get the rough shape.


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First pass with the shrinker and E wheel.


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More wheeling and finish fitting. This shape that I put in at the forward end fades away as the piece rolls under toward the bottom which is nearly flat.


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Pretty much finished. I'll do some trimming and finish work then weld it in.


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  #1442  
Old 12-30-2019, 02:39 PM
dwmh dwmh is offline
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Great project Jack.
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  #1443  
Old 01-01-2020, 04:05 AM
bradleyc1982 bradleyc1982 is offline
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Quote:
Originally Posted by Jack 1957 View Post
Tacked and ready to weld. I'll double check the fit tomorrow and weld it up. It looks better than the first one. I'll have to clean up the right side a little to match better with this side.

Attachment 36127

Attachment 36128

Attachment 36129
Hi jack

Read all the way to page 33 so far, amazed by your skills and build. Are all the joins on the rear section you have built butt welded or do they overlap? Some look overlapped (the big rear section that you welded down the middle).

Were they mig welded? Do you tack weld slowly to avoid distortion? I can never seem to mig weld and get the sheet to stay perfectly flat.

Looking forward to reading the rest of the build and seeing it finished

Bradley
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  #1444  
Old 01-01-2020, 10:24 AM
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All sheet is butt welded with MIG. I usually don't get much distortion from tacks but if I do I just planish with a hammer and dolly.
You don't actually butt the panels against each other. That might be why you're having distortion problems. Too much material in one place. Leave a gap roughly the same width as the thickness of the sheet metal you're using.
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Last edited by Jack 1957; 01-01-2020 at 10:34 AM.
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  #1445  
Old 01-01-2020, 04:40 PM
bradleyc1982 bradleyc1982 is offline
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Quote:
Originally Posted by Jack 1957 View Post
All sheet is butt welded with MIG. I usually don't get much distortion from tacks but if I do I just planish with a hammer and dolly.
You don't actually butt the panels against each other. That might be why you're having distortion problems. Too much material in one place. Leave a gap roughly the same width as the thickness of the sheet metal you're using.
Thanks jack do you planish with heat or cold?

Excellent work once again...can’t stop reading this thread

Bradley
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  #1446  
Old 01-01-2020, 06:52 PM
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I don't usually overlap panels when welding and if I do, it's because of a situation like this. I needed a much closer fit on this fender skirt to the body. I mounted the skirt and trimmed the patch to fit with the skirt mounted so I could get it right. I tacked the patch on but trimmed it afterwards then welded. If I've done this before in this thread, I probably didn't cover the details so I'll do that now.

The patch is overlapping the cut in the skirt by about 1/2". You can see it from the backside. Those tacks are at the edge of the patch but from the backside you can see that they're in from the edge of the cut.




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Next, I cut through the panel along the edge of the patch a few inches at a time, only cutting one or two tacks at a time.


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Before redoing the tacks, pull the excess material away from the inside so you don't weld it right back on again.


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Repeat the process a few inches at a time. Cut a few inches, pull the excess material back, tack and hammer and dolly to align.


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When everything looks OK, weld it up and smooth it out.


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  #1447  
Old 01-02-2020, 03:58 PM
bradleyc1982 bradleyc1982 is offline
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So for extra close patch work, thanks. Nice little trick. DO you have a process for cooling the metal during welding then to stop distortion? Sorry to keep asking questions just keen to learn some new metal working skills.

Bradley
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  #1448  
Old 01-02-2020, 05:36 PM
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You can use heat sink paste if you're having too much trouble with warping. Go back in this thread to where I was making the rear bumper. I used it there.

See pages 114 - 121.
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Last edited by Jack 1957; 01-02-2020 at 11:20 PM.
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  #1449  
Old 01-17-2020, 07:34 PM
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I had a side job to do so I knocked that out and I'm back on the Cadillac. I finished up the left side skirt and left about 1/8" gap for a rubber seal between the skirt and the body. Everything looks OK over here. Now, over to the right side.


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  #1450  
Old 01-18-2020, 06:18 AM
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Very nice flow to it all Jack.
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