topic Re: How to fillet cylinder intersection? in Fusion Support Forum

How to fillet cylinder intersection?

ashes.man — Fri, 13 Nov 2020 05:03:45 GMT

Hi,

How can I place a fillet along the blue line in the attached picture? I thought it would be simple but I always get the error shown.

Thanks

Re: How to fillet cylinder intersection?

TheCADWhisperer — Fri, 13 Nov 2020 07:23:55 GMT

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

Re: How to fillet cylinder intersection?

ashes.man — Fri, 13 Nov 2020 08:16:43 GMT

File attached.

Thanks

Ashley

Re: How to fillet cylinder intersection?

jean.flower — Sat, 14 Nov 2020 06:48:38 GMT

Hi @ashes.man and thanks for uploading your model.

I guessed where your want to fillet, I hope I chose the right spot. I can make it work after some cleanup on your sketch geometry, Here's the process I followed:

First I noticed that there's a thin sliver face (highlighted in blue) where the cylinder joins its neighbours.

This is a warning sign that something hasn't matched up properly, difficult to manufacture and can cause trouble in features like fillet.

Before working to fix this problem, I confirmed that the fillet could work if I separated out the sliver region with a temporary cylinder I combined-in just for debugging.

Looking at the sketches, I found the defining curves for that silver face in Sketch1. Here's there is some unconstrained and not quite matched up geometry.

The sketch already has some constraints and constrained geometry (curves in black). The goal here is to properly constrain that blue arc and eliminate the mismatch with the nearby construction circle. Add some tangent constraints.

Revisit the solid model with this sketch fix and you see the sliver face has gone, the model looks cleaner and the fillet works.

My advice would be to try to make your sketches fully constrained where things nearly match up to avoid problems like this in the future.

Hope that helps!

Jean

Re: How to fillet cylinder intersection?

ashes.man — Sun, 15 Nov 2020 00:35:44 GMT

Thanks for looking into that for me. I will fix up my sketch. A last minute geometry change broke my nicely constrained sketch but I needed to get a sample printed so just left it to sort later.

I do have some trouble with that sketch. the construction geometry is always well constrained and adjusts correctly with the dimension changes but the solid lines always seem to need a manual fixup.