Sign in to follow this  
Followers 0
MasterCAM Rulez

NPT Thread mill toolpath

8 posts in this topic

I need to create a 1.5-11.5 NPT internal thread, I'm not sure if I do it right, i need some help and recommendation.

 

Alt+C,Thelix-->

 

1. Enter the Radius: .95

(top internal diameter of thread is 1.9O0/2 =.95)?

!HELP! confused.gif

 

2. Enter the starting angle: O

 

3. Enter the incremental angle: 5.

(what angle value should enter i need a recommendation)? !HELP! confused.gif

 

4.Enter the number of revolutions: 4

(how many rev. should i put)? !HELP! confused.gif

 

5.Enter the pitch: .08695

(1/11.5 =.08695)? confused.gif

 

6. Enter the taper angle: 1.79

 

7.Point entry: Origin

 

Toolpath

 

Toolpath,Next Menu,Circle toolpath,Thread Mill,

entities, chain (select the helix geometry),Done, done, done

 

At TOOL PARAMETER where it said " TOOL DIAMETER",

I dont know what dia. should enter. !HELP confused.gif

 

I use thread milling insert.

 

Thanks in advance

1 person likes this

Share this post


Link to post
Share on other sites

We just did a bunch of thread milling and found several ways to do it. If your using a thread milling insert, you might want to try: Toolpaths, next menu, circ tlpths, thread mill. Set up your tool parameters, then under thread mill parameters you can set your depth, pitch, etc. The pitch on a 1.5-11.5 is (.08696) You might have to play with your settings a bit to achieve what you want, but it seemed to work pretty well for me. I use a thread mill cutter made by Advent. You might want to check them out. www.advent-threadmill.com You really need to know all the specs of the tool your using, and pick the min. diameter of your hole to be threaded. It really makes a difference on how the toolpath will be generated. Play around with it and you will see how much changing parameters affects the toolpath. Good luck!

Share this post


Link to post
Share on other sites

In V9 go to toolpaths, next menu, circ tlpths, threadmill, there is a box to fill in your taper angle for pipe threads. Works great and is easy!!

Share this post


Link to post
Share on other sites

i have a problem when i toolpath a NPT.

 

1. I already use Alt+C to create 1.5-11.5 NPT thread, the geometry on the scene show the helix move taper (1.79)on XY axis.

 

2. but when i toolpath the geometry, the toolpath doesnt move taper (1.79)on XY axis, it just cut like a normal thread (UNC or UNF)

milling. confused.gif

 

Does any1 understand my question? confused.gif

 

Thanks in advance

Share this post


Link to post
Share on other sites

sure but I don't know the answer tongue.gifbiggrin.gif

Share this post


Link to post
Share on other sites

Charlie, I created a thelix using the parameters you gave. I used a 1.000 dia. cutter (just for the hay of it) and it cut the taper on the helix like it should. If you are going to use a thelix to do it, make sure in your parameters that you have cutter compensation set to "off" on both controls. I would recommend you using the "thread mill" toolpath instead of the c-hook "thelix". I think you will have better luck.

Share this post


Link to post
Share on other sites

I agree with jammer,

use the "threadmill toolpath" --- go to toolpaths,next menu,circle toolpaths,threadmill-- then all you have to do is pick points just like drilling, fill in all your parameters including taper angle and you'll be on your way.

Share this post


Link to post
Share on other sites

Mr. William can you write down step by step how you do it (1.5-11.5 NPT thread), maybe i missed something. smile.gif

 

Thanks in advance

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0

  • Recently Browsing   0 members

    No registered users viewing this page.

Join us!

eMastercam - your online source for all things Mastercam.

Together, we are the strongest Mastercam community on the web with over 56,000 members, and our online store offers a wide selection of training materials for all applications and skill levels.

Follow us