loft problem

kees_ouderkerk

Hello everybody :-)

A few days ago i started modeling this helicopter (  http://cdn-www.airliners.net/photos/airliners/8/7/0/0532078.jpg?v=v20  ) in Onshape. During the construction of the cockpit the loft function was very helpful to me. Untill..... i had to close the holes (wich you can see on the picture) with a curvature surface. Then i found that the the loft function doesn't offer a possibility to create a surface which is curvature to both the profiles and the guides. Filling these holes with a non curvature surface seemed to be the sollution but this caused problems when i tried to thicken the non curvature surfaces. So.... Is there maybe a workaround for this problem?

Thanks in advance,

Kees

Narayan_K

@ kees_ouderkerk , As a work around you can use replace face option to match the faces.





To more details you can refer below document,

https://cad.onshape.com/documents/578c7bbce4b0483587d2917d/w/28b31e6894e18f0a324b9433/e/f699f81fc4516a09975df4e6


 Hope this will help you.

jakeramsley

Can you do a surface loft from one edge to the other and use the other bounding edges as guides?

kees_ouderkerk

Hi Jake,

I already tried this. but then (after thicken the surfaces) i got this:

(as you can seen the surface doesn't fit to the other surfaces

mahir

@kees_ouderkerk, can you share a link to your document? Perhaps someone can figure out a solution then.

kees_ouderkerk

This is the document:

https://cad.onshape.com/documents/578b4e58e4b0e425c1efa814/w/6a82ae2fffcd4df7a34ff879/e/7e755299560cd7f07ef75e24

mahir

I played around a bit with your model. I can see why you're frustrated. The surfacing tools definitely have room for improvement. A fill surface or boundary surface would be great here, but that's not part of the toolbox yet. For now, you might have more success modeling as a solid and shelling after the fact. OS just doesn't have the surfacing features for piecewise construction like you're trying to do. Here's a simplified example.

https://cad.onshape.com/documents/578ba8f2e4b02dc672b7f454/w/0cb02f229513bf48be1095ac/e/94241fd2f73922ba01a6e887

kees_ouderkerk

@Mahir, Thank you very much for looking after my problem! Now I'm sure that this is something that has not been developed yet. I hope Onshape will develop such a function in the near future ;-) 

owen_sparks

A couple of thoughts from a newbie.

(a) I'd be tempted to abandon the thicken method. Instead use a boolean to cut your surface into a solid to get a continuous smooth part.

(b) Just model one half, then use shell to hollow it out (if needed) then mirror to slap the other half on.

Cheers,

Owen S.

Narayan_K

@ kees_ouderkerk , As a work around you can use replace face option to match the faces.





To more details you can refer below document,

https://cad.onshape.com/documents/578c7bbce4b0483587d2917d/w/28b31e6894e18f0a324b9433/e/f699f81fc4516a09975df4e6


 Hope this will help you.

kees_ouderkerk

Thank you all for your help! In particular the replace face option was very helpful to me. Non the less a boundary surface option like in Creo would be the best.

Gr,

Kees