Shell on a bit more complex object

[marko.cerc]

Hi all, I'm new to fusion 360, not so new to Autodesk and other CAD software. 

As part of my learning curve, I want to design a showell handle. Kids broke it, so let's print 🙂

I wanted to make it a bit more complex, so I used a centerline with 3 different profiles and used Loft - centerline. 

That went all good, but now I want to make it hollow. Yes I could make a offset body then subtract both. BUT I want to use the SHELL function. Not sure what I'm doing wrong, but it just doesn't want to work.

Any help would be much appreciated.

Link to my project:
https://a360.co/3nCfQQQ

[g-andresen]

Hi,

allow downloading or add the model to your next post

günther

[TrippyLighting]

The link does not work (for me at least). Can you export the design as a .f3d file and attach it to the next post ?

[marko.cerc]

Done. No pass.

Attached the archive file as well.

[marko.cerc]

Yeh, can't get the link to work... File attached above. 

[jhackney1972 · Accepted solution]

Here is you model with a 3mm external thickness.  Slide your timeline marker back before the applied fillets to add the shell. 

[marko.cerc]

Thanks @jhackney1972 .

I guess I made 2 mistakes. 1st I did that before, but never noticed it went hollow, 2nd then went for fillets.

In some posts here I read U need to have fillets to do Shell. Is there any rule to that?

[marko.cerc]

Out of interest. What would be the best/fastest methode to get rid of the bottom surfaces, so it fould be open on the bottom, but still have a 3mm shell? 

[CarlM89]

Try clicking the face you want gone, then hit the delete key. Doesn't always work but worth a try. I also haven't looked at your model so no guarantees. Useful trick in any case. 

[marko.cerc]

Thanks for the suggestion. Tried that but looks like it's not an option here. The model goes crazy 😳🤣

[jhackney1972]

Your model had a very uneven bottom so I dropped back to your original model and straightened that out.  I then shelled it and removed the bottom.  It is all explained in the Screencast.  I removed all your fillets as the ones on the bottom edge had to go anyway.  As I mentioned in the video, I changed the color because dark blue is hard to work with and see edges.  You or course can change it back.  Model is attached.

[marko.cerc]

@jhackney1972 thanks a lot. Now I get it. I made it uneven when I played around with that first extrude of the Sketch 5 when I made it a bit Tapered. Thanks again John, you helped me a lot.

[TrippyLighting]

One reason shelling an object often fails is bad surface curvature. There is a curvature map inspection tool in the Inspect menu, which in this case perfectly highlights the less than ideal quality of the loft.

I personally would likely not have pieced this together from arcs and lines but used a spline as the rail: