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BP_103135424-Participant
4-Participant
Apr 25, 2025 1:04 PM UTC
Question

4-sided tangent boundary blend issues

I am using Creo 6.0 and often have issues with these 4 sided tangent boundary blends. The error says it fails to create tangency in the corner. Is there a reason for this? I understand the bounding curves have to be tangent to neighboring surfaces, and I even experimented with making the curves tangent to the whole neighboring surface and not just the neighboring surface parting line. I have tried 3 sided boundary blends but it often got tight in 1 corner and failed. 

2 replies

tbraxton
tbraxton22-Sapphire II
22-Sapphire II
Apr 25, 2025 1:27 PM UTC

The most likely reason for the failure is that the boundaries selected are not G1+ continuity in the areas required to make the surface tangent, without a model to query it is difficult to diagnose. If you post a model, then someone will likely be able to find the root cause of the issue.

 

Keep in mind that in a corner the tangent conditions (of the boundaries) are required in more than one direction in the context of what you are building.

 

tbraxton_0-1745587378592.png

 

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MartinHanak24-Ruby III
24-Ruby III
Apr 25, 2025 2:35 PM UTC

Hi,

if you can't upload your model, at least display the Gaussian curvature of the adjacent surfaces... I'm just curious to see what I'll see.

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