Fillet between a flat surface and a cone extruding from it

Gabriele_Cannizzaro

Hi all

I'm trying to find a way to fillet the transition between a flat surface (the handle for a funnel) and a cone extruding from it (the body of the funnel):

I would like the fillet to have the max radius that I specify, but then "fade off" at the edges. I've tried with various fillet settings, face blend, and a combination of tools. The closest I got to my desired result is with a combination of face blend, then extending the edges of the fillet with a sweep along the curved surface and an extrude remove to get rid of the overflow:

Not exactly there as the overflow around the cone shape is still there (see center left), and also I can't boolean these. It also seems a very clunky approach.

Are there any obvious elegant solutions I'm missing?

Thanks!

rick_randall

Gabriele_Cannizzaro - Have you tried the "variable fillet" checkbox inside the fillet command? This is a tricky function to use properly, but might give you the results you're after. Go to the "help" section and do a deep dive into the fillet command.

Here's an example

https://cad.onshape.com/documents/1389c565dad604973e5f5bba/w/af06ef710ea42312ccf8f60b/e/d50d6eae0e0a3919d2f7712d

This may not be exactly what you wanted - but it does demonstrate the variable fillet

glen_dewsbury

Here is another option to look at. There are 2 samples. Thought I'd have a go from surfacing but more features for the same thing. The sequence of fillets make a difference.

https://cad.onshape.com/documents/d24b0cd5ef6d0ee3b807c9ca/w/7ab76c0f6fa632667079aef8/e/f57e98f7880cf2938f04b2e1

EvanReese

The solutions above totally work depending on what you're after and how much you care about the aesthetics for this application, but I do cover a very similar case using surfacing tools in this video starting around 10:07.

Gabriele_Cannizzaro

Thank you all for the replies! I've checked the examples and I'll use them to play with the fillets a bit more. I was unable to reproduce some of the results, but I think that might have been due to my model having a straight 2mm extrusion into the handle rather than a handle that "merges" into the cone. In other words, the cone starts from a flat base 2mm thick, which is what the handle attaches to:

I got close to the desired result by playing with the variable fillets, but then I was able to obtain a very similar result by using simple fillets and playing with the sequence of fillet operations:

I guess what I had imagined whas this result, but with that weird pointy corner at the mating point flowing a bit more fluidly.