Welcome to the Onshape forum! Ask questions and join in the discussions about everything Onshape.
First time visiting? Here are some places to start:- Looking for a certain topic? Check out the categories filter or use Search (upper right).
- Need support? Ask a question to our Community Support category.
- Please submit support tickets for bugs but you can request improvements in the Product Feedback category.
- Be respectful, on topic and if you see a problem, Flag it.
If you would like to contact our Community Manager personally, feel free to send a private message or an email.
Eccentric Cone
larry_nelson
Member Posts: 8 ✭✭
in General
How do you model an eccentric cone in Onshape?
0
Comments
Do you mean like this?
But seriously, here is an example of how to do it.
Create a sketch of your profile, then use the Revolve feature.
Or if it needs to be asymmetric, you can loft two profiles together.
https://cad.onshape.com/documents/d92b6bca7bb0aa0491df3bdb/w/0033fcb33162a09fb619d9f1/e/215e3f24bf…
Learn more about the Gospel of Christ ( Here )
CADSharp - We make custom features and integrated Onshape apps! Learn How to FeatureScript Here 🔴
This example looks like a concentric cone.
I'm trying to create an eccentric cone
How about by lofting from a circular section to a point?
I need a flat pattern of the eccentric cone
Until lofted sheet metal is released, you'll have to use the Flatten tool to do it. It's not parametric, but it will work.
https://www.onshape.com/en/blog/cloud-native-cad-simplifies-surface-flattening
https://cad.onshape.com/documents/9d719a67b9be8b97a03605e2/w/4ce93f49ecfdd55d9a30a17f/e/93ad86c59525f374356aa768
Simon Gatrall | Product Development Specialist | Open For Work
So from a purely pedantic perspective (and the one that the sheet metal kernel abides by) the examples by @S1mon and @GregBrown aren't true cones because they'll have a slightly elliptical profile and thus different amounts of curvature across the folded faces. If the constraint you're looking for is an eccentric loft between two offset perfect circles, the method @S1mon shows is the closest you'll get with the engine today. If instead you're looking to enforce a true conic shape for manufacturing in a sheet roller for example, and don't care about the end profiles you're better off drawing the cone with a revolve feature and chopping the faces off where you want them, at which point the sheet metal engine is happy to unfold cones as-is.
https://cad.onshape.com/documents/c4ec4997362969c80bc251de/w/60b8a28d14a0e72cd69cec10/e/c8d9566785b30a07e7f827cf
Derek Van Allen | Engineering Consultant | Meddler