Sheet metal cone

bryan_lagrange

We make our cones on a press brake with triangular bends.

Here is the work around I did to achieve a sheet metal cone in Onshape with a flat pattern.

To make it smoother just add more sides to the polygon sketches.

https://cad.onshape.com/documents/b61553ca7c0d34c686ac170f/w/29eed6f7cd27da738910e958/e/30bef0d598165d2813c5e1f0

Would like to see how other Onshape sheet metal users achieve this shape.

barry_chisholm

Bryan, just trying to work out how you out the split in the loft surface.  Bit of a newbie to this so any help would be appreciated.  

bryan_lagrange

This is how I did it:

I first offset a plan to establish the height of the cone. I then made a multi sided polygon (60 sided) on each plane. Each polygon had a different diameter. On one of the segments of the polygon I put about a .010in split down the middle. Make sure you split the same segment on each polygon for the loft to generate correctly. I lofted the 2 polygons to create the cone shape. After creating the loft surface I then used the sheet metal command to convert the loft to sheet metal solid. It will create a part for each polygon segment. Use the add bend command to add bends where each segment connect. 

Hope this helps