Variable Draft

[jonmwilson]

Similar to adding variable radius points on an edge blend, is there a way to do this on faces that you add draft too? For example if I have a forged part where the outside face varies between 10 and 20 deg draft, is there a way to model that? Thanks.

 

[JohnRBaker]

What version of NX are you using?

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:

To an Engineer, the glass is twice as big as it needs to be.

 

[jonmwilson]

7.5

 

[SDETERS]

I have had this issue. Which i had to go back into the part history and change how I moldeled the part. I sketched the two different cross sections and used the through curves command to create the surface I wanted.

 

[jonmwilson]

Thanks. I had a feeling it may come down to that but was hoping there would be an easier way that I didn't know about.

 

[jonmwilson]

Attached is an example of what I am trying. Near the top and the bottom of the part I need 10 degrees draft but towards the middle of the part I am looking for 20 degrees.

 

[JohnRBaker]

OK, attached is one approach that works. It does not use the Draft function but rather a variable-angle Extension Surface which is then used to trim the model. If you follow the feature-tree you will see how I did this. The only real liberty I took with respect to the final shape was using a blend at the upper-corners rather than making it part of the profile. I know it's not exactly what you were looking for, but I suspect that it will still meet your needs.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:

To an Engineer, the glass is twice as big as it needs to be.

 

[jonmwilson]

Thank you. Thats exactly what I'm trying to do.

 

[jerry1423]

Very cool model !
I love the way the law extension worked.

 

[Toost]

Here's one example using the variable taper, -from edges method.
When using the method John showed, the Law Extension, you can also control how the surface transitions between the different angles, linearly, cubic etc. The taper is more restricted in that matter.

Regards,
Tomas

 

[jonmwilson]

Thanks for the help. I didn't realize that we had this option when using draft from edges.