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Old 01-27-2021, 05:43 AM
Bart Bart is offline
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Default Roof Panel fab

Hi Guys


Just wondering what some have used or prefer to shrink the edges of a roof skin panel, or any large panel you've worked on. Trunk, hood.


So far I've been able to shrink the edges to a reasonable level and got pretty good curve in the panel, but wondering if anyone has better faster ways? Please post pics, I think because its quite a large panel (roof panel) there's a lot of material to shrink and its going slower than I like.
It's a low crown roof, I'll be doing some wheeling on it soon.


Thanks everyone
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Last edited by Bart; 01-27-2021 at 06:15 AM.
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Old 01-30-2021, 07:22 PM
Reno Reno is offline
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Bart, I am going to have to shape a low crown roof panel to fill the roof opening in the Austin. I like Lazze's explanation with multiple soft rectangles with diagonal passes through the English wheel.
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Old 01-30-2021, 07:37 PM
Bart Bart is offline
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Cool, i was thinking diagonal. I haven't gone too far with it so ill ill try it.

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Originally Posted by Reno View Post
Bart, I am going to have to shape a low crown roof panel to fill the roof opening in the Austin. I like Lazze's explanation with multiple soft rectangles with diagonal passes through the English wheel.
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Old 01-31-2021, 02:08 AM
Jaroslav Jaroslav is offline
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Bart. We used a back bend on the edge of the panel. The back bend holds the shape. When you have finished shaping the panel, straighten the edge. The panel holds its shape throughout the shaping in EW.
DSC097081.jpg
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Old 01-31-2021, 03:16 AM
Bart Bart is offline
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Interesting, I've never used that before

DSC097081.jpg
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Last edited by galooph; 01-31-2021 at 03:52 AM.
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Old 01-31-2021, 05:35 AM
Jaroslav Jaroslav is offline
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Yes, that is the edge about 40 - 50mm. This edge holds the entire panel. After shaping, you can straighten or cut it. The shape of the panel does not change.
Try and send a photo. It's simple to unbelievable. A friend advised me with in shape the rear hood. He laughed at me as I could not produce it. The shape bent more than I wanted. It rippled in all directions. Such a simple thing solved it. We bent it in straight wheels in EW - without measuring - on the eye.
Again, the devil is hiding in the detail.


The customer did not know that the hood was made this way. He thought that the hood was supplied by someone made by pressing or that it was original. A little secret ..... Expensive car.
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Old 01-31-2021, 08:18 AM
Bart Bart is offline
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So did you make the edge first?
Then start shaping?


Quote:
Originally Posted by Jaroslav View Post
Yes, that is the edge about 40 - 50mm. This edge holds the entire panel. After shaping, you can straighten or cut it. The shape of the panel does not change.
Try and send a photo. It's simple to unbelievable. A friend advised me with in shape the rear hood. He laughed at me as I could not produce it. The shape bent more than I wanted. It rippled in all directions. Such a simple thing solved it. We bent it in straight wheels in EW - without measuring - on the eye.
Again, the devil is hiding in the detail.


The customer did not know that the hood was made this way. He thought that the hood was supplied by someone made by pressing or that it was original. A little secret ..... Expensive car.
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Old 01-31-2021, 10:10 AM
crystallographic crystallographic is offline
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(Bart : note also - for tough metals like 2024 T3, stainless, Ti etc, or on thick sections, we make angle pcs and rivet them on in the outer trim zone, so they help hold shape during shaping)
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Old 01-31-2021, 10:32 AM
Jaroslav Jaroslav is offline
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I would shape a little and then lift it. It starts to twist badly quite soon. It still looks like it's not shaped yet - the panel looks turned in all directions. Then you find out it's more arched than you wanted. And you can't use so many garden grills that you didn't want to make.

The edge holds it beautifully. You have to try. No stress.
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Old 02-01-2021, 02:46 AM
Bart Bart is offline
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Thanks guys.

Ill post some pics soon
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