topic Re: How to get a perfect filet? in Fusion Design, Validate & Document Forum

How to get a perfect fillet?

bluepr0 — Fri, 14 May 2021 10:46:42 GMT

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!

Re: How to get a perfect filet?

TheCADWhisperer — Thu, 13 May 2021 19:16:36 GMT

Extrude Thin Feature

Extrude Surface and Thicken

Shell

Math...

Re: How to get a perfect filet?

bluepr0 — Thu, 13 May 2021 19:58:54 GMT

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!

Re: How to get a perfect filet?

g-andresen — Thu, 13 May 2021 20:03:59 GMT

Hi,

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

Günther

Re: How to get a perfect filet?

TheCADWhisperer — Thu, 13 May 2021 20:24:00 GMT

@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.

Re: How to get a perfect filet?

bluepr0 — Thu, 13 May 2021 21:16:24 GMT

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!

Re: How to get a perfect filet?

jhackney1972 — Thu, 13 May 2021 22:07:00 GMT

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.

Re: How to get a perfect filet?

bluepr0 — Fri, 14 May 2021 07:37:00 GMT

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?

Re: How to get a perfect filet?

TheCADWhisperer — Fri, 14 May 2021 10:27:47 GMT

1. What exactly are you attempting to model?

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

Re: How to get a perfect filet?

HughesTooling — Fri, 14 May 2021 14:08:06 GMT

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