Loli-pop mills and chamfering 1

[jarek30]

Hi,

Maybe someone could help me with it. I'm trying to chamfer holes from the inside using a loli-pop mill. I can create the loli-pop mill by modification of barrel type mill, but I can't figure it out how to force the system to generate a toolpath on inside profile of the hole.

I have attached model made in NX 7.5.3

Cheers!

 

[joycejo]

First create a User defined tool that has tracking points at the top and bottom of where you want the tool to follow the boundary. Then create 2 planar profile operations, this is the only operation that can use a "User Defined tool"
One operation for the top and one for the bottom. Use the lower tracking point to cut the top chamfer and the top tracking point to cut the lower chamfer. I am using NX6
see the attached part file.

John Joyce
N.C. Programming Supervisor
Barnes Aerospace, Windsor CT
NX6.0.5.3

 

[Jaydenn]

I can't see your model, but I believe I know what you want.

I included a super simple example file. Try that on for size.

I use the "fixed contour" toolpath.

JAY

NX 6.0.5.3

 

[jarek30]

Hello John,

Thank you for your help, but I have a hole going through empty cylinder. Cross curve is a 3D curve. Planar profile will not work for this. Jaydenn's solution is very close to this what I'm looking for, but thank you anyway.

 

[jarek30]

Jay,

Thanks for help. This is something what I'm looking for. But I was thinking about loli-pop driven by a 3D curve that is creating when crossing hole through the empty cylinder - see picture attached. One toolpath, simple and flexible. I can control size of the chamfer oby the tool lenght directly on the machine using tool data table. Is this even possible in NX? To do that, loli-pop tool should have some kind of tracking point to be defined on the spherical surface or maybe I'm wrong...

 

[joycejo]

Unfortunatly you cannot have a tool with a "Tracking Point" and use it any operation other than planar profile. Attached is the only solution I have found for this type of operation.



John Joyce
N.C. Programming Supervisor
Barnes Aerospace, Windsor CT
NX6.0.5.3

 

[jarek30]

John,

Thank you for this example. This is something I can use on the other part. But to be honest, it should not be a problem for Siemens/UGS guys to add this kind of functionality for loli-pop mills. But it would help many programmers.

Thank one more time, John.

 

[raysapp]

Jarek
When I started using NX I asked asked someone at GTAC about this and they recommended surface area. It's actually a pretty versatile toolpath, not just for kelloring. You can generate a single pass if you want. Take a look at this and if it's what your looking for I can upload a sample. Also if you do a lot of this you should check out Harvey's catalog. The have a lot of these tools on the shelf.

http://www.youtube.com/watch?v=guMrqRbA_A4

Ray S
NX 7.0.1.7

http://www.appliedprecisionproducts.com

 

[jarek30]

Ray,

This is exactly what I'm looking for. I would be very appreciated If you could upload a sample. Thanks in advance. A single pass is something I look for.

 

[jarek30]

Ray,

One more thing, is the collision avoidance accessable for this toolpath?

 

[joycejo]

On the example I sent you it uses surface area as the drive method and yes, Collision avoidance is avalilable, Non-cutting moves - More tab



John Joyce
N.C. Programming Supervisor
Barnes Aerospace, Windsor CT
NX6.0.5.3

 

[jarek30]

John,

Yes, I know. But I was trying to get single pass, no succeed. At least two passes are genereted. Do you know how to acheive a single pass?

By the way, collision avoidance is avaiable, this is correct, but it doesn't work. I have check this on my sample. Look at the attached picture.

 

[joycejo]

To get a single pass set the stepover to 0

John Joyce
N.C. Programming Supervisor
Barnes Aerospace, Windsor CT
NX6.0.5.3

 

[jarek30]

John,

Thanks. It worked.

 

[raysapp]

Jarek
Sorry for not getting back sooner. As you've already figured out, John and Jay's samples have everything you need. I had not checked them out when I posted my first response.
Good luck.

Ray S
NX 7.0.1.7

http://www.appliedprecisionproducts.com