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Modelling a mill-turn c-axis feature

Modelling a mill-turn c-axis feature

Modelling a mill-turn c-axis feature

(OP)
Guys, Could any of you NX wizards offer some advice on a feature I want to model?

The easiest way to explain it is ... to imagine a lathe with a milling cutter moving 5mm in the -Z direction whilst the part rotates 180-degrees (ie 'C' axis).
This is pretty much like using a milling cutter to cut half a turn of a thread.

In the old days of I-Deas I would have achieved this by rotating a sketch with a 'translation' element on.
Should I be looking at the 'helix' or 'law curve' features?
Would there be a good way of 'lofting' between two sketches?

Any help gratefully received ...

RE: Modelling a mill-turn c-axis feature

There's a difference between generating a model feature used for driving a toolpath and a model that accurately represents the geometry that would result from this toolpath. With a blind slot its complicated, involving an approximation of a swept solid. This has been dealt with in numerous posts both here and on gtac site. Unfortunately I was unable to find them with a quick search. Here's a model(s) that approximates the result of such a toolpath, contributed by Hudson I think.

Ray S
NX 7.0.1.9
www.appliedprecisionproducts.com

RE: Modelling a mill-turn c-axis feature

(OP)
Ray! Your a star!
I now understand how the 'law curve' works within 'helix' and your stud end 'law extension' etc is genius!
I kinda thought this was what I wanted to achieve but something was missing.
This has been a big jump in my knowledge so thank you!
Jon
 

RE: Modelling a mill-turn c-axis feature

I'm glad it helped, but as I mentioned, the model is Hudson's. I wish I'd saved the thread link as well.

Ray S
NX 7.0.1.9
www.appliedprecisionproducts.com

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