topic Re: Having trouble making shell in Fusion Design, Validate & Document Forum

Having trouble making shell

goochgangOGmember — Sat, 04 Jul 2026 07:50:11 GMT

I'm having trouble creating a shell in Fusion. I understand how the Shell feature works in 3D modeling, and I honestly can't see anything wrong with my solid body.

I've already tried splitting it into several smaller bodies to identify the problematic area, but the Shell feature doesn't work on any of the resulting pieces either.

I've also tried creating a surface and thickening it, converting the model to a mesh and creating a shell from that, and using create form followed by thicken (which worked to some extent, but the thickness was very uneven). I even tried the same model in Autodesk Inventor, but with no success.

At this point, I've run out of ideas. Any help would be greatly appreciated.

Betreff: Having trouble making shell

wersy — Sat, 04 Jul 2026 08:26:10 GMT

Can you upload the file with timeline?

Re: Having trouble making shell

TrippyLighting — Sat, 04 Jul 2026 15:32:35 GMT

The geometry has pretty horrible curvature, which is the root of the problem. If this was modeled in Fusion, please share the .f3d file with the timeline, so we can see how it was modeled and perhaps recommend a better workflow.

Re: Having trouble making shell

goochgangOGmember — Sat, 04 Jul 2026 16:14:48 GMT

Thank you for the quick reply! Here's the .f3d file.

Re: Having trouble making shell

TrippyLighting — Sat, 04 Jul 2026 18:56:29 GMT

Shelling isn't the first problem in this model.

I would start by fully constraining and dimensioning sketches. All of them!

There is no need to use a 3D sketch here.

The end result explains roughly what you want to achieve, but almost all of the modeling techniques are incorrect

Re: Having trouble making shell

TheCADWhisperer — Sun, 05 Jul 2026 04:52:43 GMT

@goochgangOGmember

It seems like I have seen this design before.

Are you attempting to follow a Tutorial?

If yes. what is the link?

Re: Having trouble making shell

goochgangOGmember — Sun, 05 Jul 2026 10:48:18 GMT

I did this design by my own, with no tutorial

Re: Having trouble making shell

goochgangOGmember — Sun, 05 Jul 2026 11:02:49 GMT

I understand, thank you for the criticizm. I am not fully happy with the resoult i archived. First of all shape of the corner is not round as i wish. That's why i made this 3d sketch and this is the best resoult i can get. I want to learn how to properly design lofts (by the way maybe loft is not best way to design this kind of shape?). If there is no need to use a 3D sketch, how i can make rails in another way? Making few construction planes and 2d sketches?

I am very grateful for any tip that helps me improve my skills.

Re: Having trouble making shell

TheCADWhisperer — Sun, 05 Jul 2026 21:15:11 GMT

@goochgangOGmember

Attached is an example that we can work from.

How did you determine the position of the 4 hole mounting flange?

(My example is not intended to match yours just yet.)

Re: Having trouble making shell

johnsonshiue — Tue, 07 Jul 2026 13:01:32 GMT

Hi! Here is a quick attempt to recreate the model based on the imported geometry.

Many thanks!

Re: Having trouble making shell

bhavani_sankuratri — Sat, 11 Jul 2026 09:57:34 GMT

Hi @goochgangOGmember ,

Thank you for sharing the details.

Did the response provided by johnsonshiue , TrippyLighting and TheCADWhisperer answer your question? If so, could you please mark the post as the accepted solution? This will help other community members who may encounter the same issue.