topic Re: Patch surface issues in Inventor Forum

Patch surface issues

vyrtech3 — Fri, 20 Mar 2026 12:22:25 GMT

Hi everybody

Could you be so kind and help me to connect surfaces? I was using Creo Parametric and here in Autodesk® Inventor® 2023 it is little bit different :). Please see a ipt as attachments

I wouldl like to connect two circles (dia140mm) on the to with the one on the bottom (dia240mm).

Have a nice day

Re: Patch surface issues

Schredhammer — Fri, 20 Mar 2026 18:52:42 GMT

Here's my attempt, saved in 2026 version of Inventor.

Edit, I also attached the file in stp format

Re: Patch surface issues

Schredhammer — Fri, 20 Mar 2026 19:02:25 GMT

here's another attempt. Smoother transition from the two forks to the main cylinder.

Re: Patch surface issues

johnsonshiue — Fri, 20 Mar 2026 21:11:20 GMT

Hi! There are multiple ways to create the geometry. Here is one solution without using Loft, Boundary Patch, or Freeform. I tried honoring the design intent as much as possible. The geometry at the junction is undefined. As long as the transition is smooth, it should be fine. However, you may need to run CFD Analysis to ensure the fluid handling performance is acceptable.

Many thanks!

Re: Patch surface issues

vyrtech3 — Sat, 21 Mar 2026 16:37:26 GMT

Hello

Thank you very much. It looks very good. The thing is i would like to learn it how you make it. Is it possible to make process video maybe?

Would you be so kind?

Re: Patch surface issues

vyrtech3 — Sat, 21 Mar 2026 16:38:11 GMT

Many thanks. Have a nice day

Re: Patch surface issues

Schredhammer — Mon, 23 Mar 2026 11:57:23 GMT

Absolutely, here is a video showing the steps.

Re: Patch surface issues

vyrtech3 — Tue, 24 Mar 2026 17:23:54 GMT

Piece of cake :D. Well if you know you know. Thank you very much for your support and willingness.

Have a nice day.

Re: Patch surface issues

Schredhammer — Tue, 24 Mar 2026 17:26:23 GMT

you're welcome!