Double draft

asgeir_arnevik

Hey everyone, I'm trying to use draft to widen this halftube, as shown with the blue arrows. The draft starts at the blue arrow to the right. But i want to do the same thing on the inside, to make it look as demonstrated with the red arrows. I tried drafting again on the inside, but the draft fails, so i am out of options.

Daniel_Kane

I was able to do this with 2 drafts, check out this document . I used a semi-circular profile for the pipe though. If yours is more complex do you mind sharing a link to your model?

nick_papageorge073

Here you go:

https://cad.onshape.com/documents/8c000e2e3e5594ecd06d99be/v/6dfe1528c6c73fa46605672b/e/dd33fd24098aaea30496809b?renderMode=0&uiState=65caa1f13a62837281c402e4

Daniel_Kane

I was able to do this with 2 drafts, check out this document . I used a semi-circular profile for the pipe though. If yours is more complex do you mind sharing a link to your model?

nick_papageorge073

Another option is to make it solid, add the draft on the outside, then shell the inside. Or, extrude as a surface, draft it, then thicken it. These strategies are used a lot for injection molding in order to maintain a constant wall thickness.

asgeir_arnevik

@Daniel_Kane, i tried what you showed me in your file, but it won't work. Here is a link to my document: https://cad.onshape.com/documents/baa755dc7a313e0219e43468/w/4f8e0f17a36866342f8de3a8/e/d21aa66c8b727b06e3fab67e

asgeir_arnevik

@nick_papageorge073 do you have a document that illustrates what you described? I'm afraid i don't understand.

asgeir_arnevik

I managed to kinda do it, but for some reason i can't have a angle lower than 5 degree

nick_papageorge073

Here you go:

https://cad.onshape.com/documents/8c000e2e3e5594ecd06d99be/v/6dfe1528c6c73fa46605672b/e/dd33fd24098aaea30496809b?renderMode=0&uiState=65caa1f13a62837281c402e4

asgeir_arnevik

Thank you @nick_papageorge073 and @Daniel_Kane For your help