How to get a perfect fillet?

[bluepr0]

Hello,

I'm looking for the best way to create a proper filet that does outside and inside of a given body. This means for example if I apply the command on the outside, that the inside is calculated automatically. Pretty much what the Shell command does, where you get perfect corner radius outside and inside.

This is the body I'm working with

 

If I apply fillet on the outside, this happens. Border inside doesn't get fillet. 

Okay fine, let me add fillet in the inside and outside, which results on this. Not visually correct

 

I know I can apply first fillet on the outside and then calculate the inside, but I'm looking for an automated way so fusion can do it for me and get something like this

 

Thanks for any help!

[TheCADWhisperer]

Extrude Thin Feature 

or 

Extrude Surface and Thicken

or 

Shell

or 

Math...

[bluepr0]

I'm not entirely sure how to round this with extrude, I've tried both modes but no luck. For shell, on this body it won't work.

As for math, yeah that would be one option but I'm guessing there's a better way to do it?

Thanks!

[g-andresen]

Hi,

Believe me, there is no such thing as CAD without maths.

Günther

[TheCADWhisperer]

---

@bluepr0 wrote:

For shell, on this body it won't work.

---

Why would I suggest a technique that won't work?

I forgot Sheet Metal...

@bluepr0   If I make a suggestion - it will work.

[bluepr0]

It doesn't work with what I have, which is not a sketch. I know how to do it with a Sketch. My problem is when you are already into modeling several bodies and you for example extrude a part that looks like on my file, how would you round that one?

Attaching the file for reference. Thanks a lot!

[jhackney1972]

It is sort of hard to create a matched fillet when the wall thicknesses of your part vary.  In the Screencast is the method I would use if I was given a model in "this state".  If I were creating it from scratch I would use another methods.

By the way, I would consider trying to use Fusion 360 with Capture Design History on, I think you will have a lot better success and enjoy it more.

[bluepr0]

Thanks for the screencast! I was more or less clear on how to do it that way... I just wanted to see if there was a tool from fusion that would help you with that automatically.

By the way, you mentioned you would do it in a different way. What would be that way?

[TheCADWhisperer]

1. What exactly are you attempting to model?

2. Can you model wit with Capture Design History turned on?

[HughesTooling]

Without history you're making life hard for this sort of thing. With history you can use parameters and something like this. I've averaged the wall thicknesses then added it to the inner radius. File's attached