Small surfacing challange

[Jacoolo]

I know you guys are very keen to face challenges, but due to the time limitations, such ones which are not too big. In parallel there must be something to learn at the end

so, first I encourage everybody "Surfacing addicted" to check this link

http://www.youtube.com/watch?v=-lOkFa_PJ3s

it is a presantation how to solve typical front fender in Alias

what I`ve done after watching this movie was an attempt to handle it in Pro/E

gues what - not that simple.

so at the end I thought it would be nice to review all possibl approaches, is there anybody there to attend?


this is my(almost) step by step approach

*so there are two surfaces not tangent to each other



*if You try to create surface tangent to those first ones, they won`t share common edge, this is obvious



* so I tried to do some patch work, same as guy at Youtube did




*the results are sh*ty though




what are your approaches?

 

[jsantangelo]

What about creating a Ribbon surface where the two faces will meet. That way when you create them they have a common surface to be tangent to.




Create the Ribbon REF surface (previous discussion) first where the red line is shown, then create surface 2 shown in the pic. The ribbon surface could also be made from a VSS so you can control the twist/angle as it is sweeping along the redline.

Using Ribbon Surfaces to Create Tangent Surfaces - another link on using ribbon surfaces.


********Jacek, can you share your part file so we can all work from the same base file?********


Here is a quick demo on using a Ribbon and VSS surface to force tangency.

http://santangelo-eng.com/proe_tuts/ribbon_vss_tangent.swf ...or Right Click and Save As to save it to your local computer

Here is the file used in the demo in WF4 format (155 KB).
2009-11-12_145044_ribbon_vss_tangent.prt.zip





Edited by: jsantangelo

 

[Jacoolo]

james thx for input

regarding riibon surface tool, I use it rarley ever. First, as much as I know this requires curves tangent to each other what is not a case in this particular example. So, I see it useless.

these are start conditions I`ve taken

 

[zpaolo]

This is my attempt...



It is quite smooth, I'll check with your starting conditions. I used ISDX for the 4 boundary curves and other lines.

Paolo

 

[Jacoolo]

great job zpaolo

can you share patches or curves layout?

 

[zpaolo]

Yes, I tried with your dimensions, and here are the pictures:





I basically replicated the patch layout of the Alias tutorial, I never forced tangency or curvature continuity of curves, instead I forced CC for the surfaces in ISDX, allowing it to correct CC of the curves.

Here is the part (WF50):


2009-11-13_092511_side_washout.prt.zip

Paolo

 

[jsantangelo]

james thx for input

regarding riibon surface tool, I use it rarley ever. First, as much as I know this requires curves tangent to each other what is not a case in this particular example. So, I see it useless.

I have yet to use it in my line of work but just happen to know of it's existence.

Thanks for the dimensions.

 

[spidernate]

I too followed pretty closely the youtube video, with good success using just Pro/SURFACE. I also applied his "fillet" down the crease... I did not create the inside fender surface quite so flat either...

Colored the surface patches so you can see them OK.
It turned out to be somewhat flexible as well.

 

[Jacoolo]

great stuff spidernate

I cam to similar results