Taper NPT

[cpalmer1]

Hello people of Creo Users,

I was wondering if anyone here has any success in creating a tapered thread (such as NPT) in Creo Direct Modeling. I know Pro-E has this feature, but since I don't have the program available to me I cannot see how it is done, and I can hardly find any resource material for this subject.

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[TomD.inPDX]

The taper angle is fairly straight forward. The OD at the surface however seems to be the challenge.

I suggest making a table of common sizes and keeping it handy.

Any particular size you need the specs for out of Creo?

[cpalmer1]

Basically 1/8 -> 4" sizes

Yes I have a table for this and other tapered thread handy

**As I'm CST it's nearly 5pm here so I'll be answering replies tomorrow **

[TomD.inPDX]

Very good. Are you saying you have the PTC hole files or a industry reference?

PTC would likely be a little miffed if I posted the data so this is an example of how the hole table data is applied:

From what I remember, threads do not translate in Creo Direct Modeling. But I included the reference here:

Are you trying to make physical threads in Creo Direct?

[cpalmer1]

yeah, that might be. But the reference you're showing is pretty much what i'm trying to create, the simplified version. Physical threads just take up too much resources

[TomD.inPDX]

Did they add some sort of of representative thread in Creo Direct? I worked with CoCreate and didn't see anything for thread representation.

What I can do is make a export step with surfaces that has the default NPT sizes you need. Would that help?

[cpalmer1]

it's pretty much a straight thread when you fill out their tables, so no tapering.

Yes, that would be very helpful Though I'm just a beginner lisp operator it will help me out a lot

[TomD.inPDX]

I'll post up a STEP file later today.

[cpalmer1]

Thank you

[TomD.inPDX]

I can see one of these at my local ACE h/w

Part file is Creo 2.0 full version parametric

The Neutral and Step files have annotations and quilts included

Let me know if you have trouble with any of these.

[Texican]

Thanks for the files...this helped me!

[TomD.inPDX]

You are welcome, Manuel.

Welcome to the forum!

[cpalmer1]

Honestly I'm still stuck on this. I can create the profiles, but not the thread attribute

[TomD.inPDX]

What version of Pro/E are you using?

[cpalmer1]

ah..... I'm actually using Creo Direct Modeling.... not Pro E

[TomD.inPDX]

I got ya. I have no clue as to how direct modeling manages their parameters.