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Rotary shouldered connections' threads

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alphawell

Mechanical
Feb 24, 2016
14
US
Hello, colleagues. Thanks for your attention.

As mentioned in thread561-335093, the Thread tool produces somewhat ambiguous results regarding to the tapered threads, at least when talking about NX 10 or earlier. Summarizing the content of the above mentioned topic, Thread tool is applicable only to cylindrical faces, and this application results in thread, which is displayed purely in drawing view, whereas model does not reflect any tapered face, only cylindrical ones. By the way, even the angle of the taper is not configurable, it's a constant value of 6 degrees.
Our company produces products, equipped with the vast majority of the rotary shouldered connections' threads as per API Spec 7-2 (like NC, Reg, FH etc.) and our national, Russian, standards. These are tapered, coarse pitched threads with the seal shoulders. There is no practical purpose for us to create detailed threads, but the drawing representation of these threads is obligatory. Moreover, the model itself should strictly correspond to the drawing, I mean the tapered thread's face (thread's crest, or major diameter face) must be tapered, with the exact same taper angle. Actually, no other extra elements of the thread are required in the model.
As far as I understand, it's impossible to satisfy our needs merely using built-in Thread tool. So my question is, which approach is suitable in this particular case? May be somebody challenged this issue, and have found the solution. I guess I should create some custom feature using one of the NX programming interfaces, and I'm not sure which one should I choose.

Any help appreciated.
Best regards.

NX 10.0.3.5
 
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