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G2 surfacing technique

Genius
Genius
Below is a model from the web. I think that some of you, at the first glimpse of it, would know what I want to ask about.
 
Its surfcing technique seems to be some kind of antique G2 surfacing technique.
 
Is it still a sound technique or simply replaced by more advanced ones today? Your comments would be appreciated. Thanks!
 
Image.png
 
Image.png
7 REPLIES

Re: G2 surfacing technique

Siemens Phenom Siemens Phenom
Siemens Phenom

It is about creating 4 sided surfaces so can use the natural flow of the NURBS maths.

Creating some surfaces, then when you have an odd number of surface coming together, trimming to get to a clean 4 sided area to fill.

 

The example you show is however way excessive.

More like this is better.

2018-01-23 19_44_57-NX- Modeling.png

Steve V

Re: G2 surfacing technique

Siemens Phenom Siemens Phenom
Siemens Phenom

Hi Surfactant,

 

I would definately set it up differently and use studio surfaces like in the attached pic. On the other hand i do not have all the requirements - however the example fulfills your surface cotinuity requirementsin the various areas....

Transition_small.PNG

Best Regards

Fred

Re: G2 surfacing technique

Genius
Genius

Hi @StevenVickers   Thanks for your comments!

 

Hi @Sandman   Thanks for your solution! I followed your model history to do the job. But the result is not as good as yours. Can you share your part file for a comparison? Thanks!

 

Image.png

Re: G2 surfacing technique

Genius
Genius

Hello

 

when working with free form you should set the visualization preferences / faceting to ultra fine.

 

 


Meinolf, , Leistritz Turbinentechnik GmbH


Production: NX10.0.3, TC 10.1.4

Testing:NX11 Beta

Re: G2 surfacing technique

Genius
Genius

Hi @Triumphator   Thanks for the suggestion!

Re: G2 surfacing technique

Genius
Genius

You also could use a styled blend or section surfaces in such cases. With this you do not need to create additional cross curves, maybe you can reach G3, and you can modify the shape using the depth and the skew.

 

 


Meinolf, , Leistritz Turbinentechnik GmbH


Production: NX10.0.3, TC 10.1.4

Testing:NX11 Beta

Re: G2 surfacing technique

Genius
Genius

Hi @Triumphator   Thanks for sharing your solution! Let me understand it well.