How can I model a split draft on a cylindrical hub fan surface?

[beh188]

Hi,

I am modeling an aluminum fan with 7 blades around the fan hub. (A cylinder with 7 blades off of it at an angle). The design calls for a 5 degree draft from the edge of the fan hub up to the fan blades. Any ideas how to model this? The problem is that the draft needs to split between the fan blades because there is an opposite draft effect due to the draft being applied from the hub to the fan blades on both sides (the angle of draft is opposite along this parting line).

Thanks.

 

[donyoung]

If your hub is symmetric about a base (or other plane) you
can use this as 'split plane'. Use Draft with these
options set
- from Plane
- Split draft
to set use the leftmost button on the ribbon bar after invoking
the function. Then
- specify the plane that the hub is symmetric about
- select the cylindrical face
- specify the angle 1 and 2 (can be different)
- LMB on Next
- set the direction (inward/outward)

Finish

HTH
dy

 

[beh188]

I found that the best way to model this was to use surfacing and a boolen feature to combine the surface with the part.