topic Re: Fillet not working on curved 3D solid in AutoCAD Forum

Fillet not working on curved 3D solid

rozenfeldsmartins — Fri, 05 May 2023 07:59:47 GMT

Hello,

I'm struggling to add a fillet to creases of my model, perhaps someone could help me find out what could be the problem?

Re: Fillet not working on curved 3D solid

j.palmeL29YX — Fri, 05 May 2023 11:31:02 GMT

I tried to add a fillet in Inventor. Up to radius 0.28 mm I get the attached result. A larger radius fails in Inventor too.

Is it your intention that the model is not symmetrical to the XY plane?

(Even if yes: If a part is mainly symmetrical it is a good practice to place the model symmetric the the origin planes, in you model to the XY- and YZ planes of the WCS)

Re: Fillet not working on curved 3D solid

parkr4st — Fri, 05 May 2023 15:10:33 GMT

I also question the non symetric

aside from that the attached dwg may help, may not

the solid was subtracted from two boxes and the result is the negatives of the part.

there are two completed fillets that are relatively easy working in the negative.

I stopped there as not sure if would make the solution easier or not.

If it works the negative can be used to subtract from or slice a solid and produce the postive part, at least in theory

Freeze layer 0 to see the parts better.

Re: Fillet not working on curved 3D solid

rozenfeldsmartins — Wed, 10 May 2023 19:59:53 GMT

Thank you for the advice. Indeed, when I made the object symmetrical the filleting worked better, even if I needed only a half of the model. I did try to invert the shape by using the subtracting method and edit it as a surface, but later I wasn’t able to convert the object back to a solid due to an issue with water-tightness.

Eventually what I did I went back to the file before unifying the four solids, deleted all the fillets and re-applied them - first the parallel ones, then the one that intersects those. I had to play a bit with radiuses to make the geometry work.