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Author Topic: "Y" fillet blending / washout in inflection regions  (Read 428 times)
dj_singh
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Posts: 3


« on: May 29, 2010, 01:45:06 AM »

Dear all,

This tutorial is for blending fillets in " Y " type zone ( 2 fillets blending in to one ) where curvature inflection in the fillet surfaces occurs.

I have seen many digital modelers to get stuck in the similar kind of region shown in the PDF.
Every individual has own strategy and ways of solving the area.

This tutorial will provide an efficient method for solving these kind of regions.



Regards,
DJ
« Last Edit: June 07, 2010, 09:13:35 AM by Class A Surface » Logged
Kevin De Smet
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Posts: 8

An Extraordinary Vertex


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« Reply #1 on: June 01, 2010, 11:25:33 PM »

Nice method, looks good!
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uwe rossbacher
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Posts: 3


« Reply #2 on: June 02, 2010, 02:35:36 AM »

i find the method interesting. might be you would like to know our experience in Germany.
In class a we are NOT allowed to change the fillet you do at first in that open hole. On one site you align it curvature on the existing fillet, on the opposite side you align it curvature to the flat surface, such a "twist" in the fillet is not allowed in the German class a departments i am working in, because the highlight that is running on the fillet will be changed too much. i know that you could achieve g2 and Catia v5 tolerances without ths little slice patch you do at the last step in your tutorial.

best wishes
Uwe Rossbacher
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dj_singh
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Posts: 3


« Reply #3 on: June 02, 2010, 04:55:19 AM »

Dear Uwe,

I appreciate your sharing of the methodology. I agree to what you have mentioned. The highlight will change from fillet surface to "s" surface because of the in between patch. This method, however, can be used even if you carry the first fillet surface till the S surface end ( remove the "s" surface altogether ) and then build secondary surfaces over it. In this case your original fillet highlights will be retained.
The main objective of this method is to address the inflection zone. The opposite end can always be made as per your methodology.
I hope i have understood it right and replied. Please write back if i understand it wrong?

DJ
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dj_singh
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Posts: 3


« Reply #4 on: June 02, 2010, 08:55:38 PM »

This method works well for G2 continuities.
If you need to solve the area for only G1 continuity, another efficient method is required. This is because the transition of curvature in inflection region in the fillets is sudden in G1 case.
I will be sharing the second method soon..

DJ
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