Inability to fillet after sweeping on two projected lines around a cone

torin_clark

Hi there,

I'm trying to design a finger support ring for my friend and I'm having some issues with filleting the area between the two sections.
Initially I created this from two solid sweeps and tried to boolean them together, however the boolean failed (probably for the same reason) and i had to generate it as two surfaces before enclosing the full shape.

Looking closer at the join between the halves, it seems to become jagged and non-continuous, though (in theory) it should be straight.

so that's...weird.

Could someone please help me work out how to better do this? If there is another method I should be using to smoothen the line, or an alternative method of generating the shape?
Model available here:
https://cad.onshape.com/documents/d6077c7ee0c7fbe17e2ae9de/w/b05ac21e8f0f77390cb35e3b/e/05e615edf04076c347286cd2?renderMode=0&uiState=663fb88c37ae1d39f46eb36b 

Thank you in advance!

David_YL_Nguyen

@torin_clark
Have a look again: https://cad.onshape.com/documents/9397f746326ef01d3d5395df/w/dca1b94420e24a34bacac6d6/e/e47697c2c9d09f6cd92c291e

I slightly changed my design approach and created the initial section of the sweep with a locked profile. I was then able to apply a fillet. I think probably for all of this with more complex surfacing operations you would be able to get a better result.

David_YL_Nguyen

Hey @torin_clark,

I think there might have been some non-manifold geometry issues going on, only creating half anbd then mirroring the part did the trick. Does that work for you?

https://cad.onshape.com/documents/9397f746326ef01d3d5395df/w/dca1b94420e24a34bacac6d6/e/e47697c2c9d09f6cd92c291e

torin_clark

Hi @David_YL_Nguyen

I think this solution would work if the parts were around a cylinder at identical angles, however the parts are not at identical angles, and are around a cone so also not identical diameters, so mirroring would not work unfortunately

torin_clark

Here is an exaggerated version of the design (inner cone left in)

David_YL_Nguyen

@torin_clark
Did you have a look at the link that I have shared, I have actually used all of your geometry (planes, sketches, angles, axis, etc.) just with the mirror to create the final part.

The part is mirrored along the Right plane not the Front plane in this case, meaning that the design follows the conical shape.

The final result image is below.

torin_clark

Ah I'm really sorry

I adjusted the sweep so that the profile direction was locked again, but I still am not able to fillet with the modified design for some reason...have you been able to?

Thank you!
Torin

David_YL_Nguyen

@torin_clark
Have a look again: https://cad.onshape.com/documents/9397f746326ef01d3d5395df/w/dca1b94420e24a34bacac6d6/e/e47697c2c9d09f6cd92c291e

I slightly changed my design approach and created the initial section of the sweep with a locked profile. I was then able to apply a fillet. I think probably for all of this with more complex surfacing operations you would be able to get a better result.

torin_clark

@David_YL_Nguyen
That's exactly what I wanted to do! Thank you!
I guess it must've been because the edge went to zero? Which it now doesn't, that's perfect, thank you!