How to fix / Smooth Multiple Surfaces, Faces or Edges

[REDesigner09]

Hi,

I have a couple of NX 6 CAD models that has multiple (solid) surfaces, faces or edges - See attachment & pictures. I'm told that if these CAD models are left "As Is", then the CAD models will be more difficult for ANSYS & Tool Programming Engineers to work with.

I'm working with another Engineer to try to resolve or recreate the model, hopefully without having to do a lot of re-work.

Any suggestions would be appreciative. Please see attached pics.

Thanks

 

[Xwheelguy]

REDesigner,

Curve quality directly affects surface quality. Just so we're on the same page, curves equate to lines, arcs, parabolas, ellipses and splines.

If you analyze your curves prior to creating the surfaces (curvature comb) and see that the combs are jagged as opposed to smooth, then you can expect a very "rough" surface that is more than likely very low in terms of surface quality. Reflecting zebra stripes or the other included images in NX analysis tools will show this quite clearly.

I've found that if you put the time into interrogating the wireframe geometry (curves), it will pay off with higher quality surfaces.

I feel it's also important for users to understand that surface modeling is an entirely different beast compared to modeling entirely from solids with analytic geometry (lines/arcs - usually sketch based). It's NOT easy in many cases, at least compared to creating a few solid features then slapping on chamfers and edge blends.

Tim Flater
Senior Designer

 

[REDesigner09]

Hi nkwheelguy,

I couldn't agree more!!! I work for a company that doesn't fully understand the necessities to having a fully validated or qualified CAD models. With issues like this & getting additional validations of other opinions, they are beginning to see that CAD quality integrity is as important as having a quality part itself.

The hardest part now, is taking the time (which of course we don't have or want to have) & making the models correctly.

Thanks

 

[Xwheelguy]

REDesigner,

Been there & done that - I feel your pain. Usually comes back and bites really hard this day and age depending upon your chosen industry or product.

Also, my apologies for jumbling the thread by responding to other inquiries and elaborating so much - hope you understand.

Tim Flater
Senior Designer