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Thread milling

Solution Partner Pioneer Solution Partner Pioneer
Solution Partner Pioneer

Why did the thread milling start to cut from the bottom of geometry? Is it possible start from the top face to bottom?
I try it. But it does not work.

Thread Milling Test.png

 

11 REPLIES

Re: Thread milling

Gears Esteemed Contributor Gears Esteemed Contributor
Gears Esteemed Contributor

If you are climb cutting (with "normal" direction tools) you have to start at the bottom (for right hand threads).

If you start at the top, you have to use conventional cutting

Ken Akerboom Sr CAx Systems Engr, Moog, Inc.
Production: NX10.0.3.5 MP16/TC11.2
I'd rather be e-steamed than e-diseaseled


Re: Thread milling

Valued Contributor
Valued Contributor

To add to Ken's answer from a practical standpoint in a blind hole it is much better to start at the bottom to avoid recutting chips which is a problem when starting from the top with conventional milling.

Mike

NX 11.0.2.7
Win 7

Re: Thread milling

Gears Esteemed Contributor Gears Esteemed Contributor
Gears Esteemed Contributor

For right handed threads, CW rotating tools will cut bottom up and CCW rotating tools will cut top down.

It is the opposite for left handed threads or if you change from climb to conventional.

This is easy to test by changing the settings Smiley Wink

Stefan Pendl, Systemmanager CAx, HAIDLMAIR GmbH
Production: NX10.0.3, VERICUT 8.1, FBM, MRL 3.1.7 | TcUA 10.1 MP7 Patch 0 (10.1.7.0) | TcVis 11.4
Development: C (ITK), .NET, Tcl/Tk Testing: NX12.0 | AWC 3.4 Preparing: NX12.0

Employees of the customers, together we are strong Smiley Wink
How to Get the Most from Your Signature in the Community
NX Customization - Best Practice Guide

Re: Thread milling

Siemens Creator Siemens Creator
Siemens Creator

As others mentioned to maintain a climb milling direction. The first few times you run it are a little scary.

Re: Thread milling

Legend
Legend

I wrote this out so I wouldnt have to scratch my head each time.

 


FOR RIGHT HAND TOOL (M03 CLW)
     CONVENTIONAL MILL TOP TO BOTTOM
     CLIMB MILL BOTTOM TO TOP

FOR LEFT HAND TOOL (M04 CCLW)
     CLIMB MILL TOP TO BOTTOM
     CONVENTIONAL MILL BOTTOM TO TOP

Glenn Balon
Production: NX 12.0.1.7 MP1 Primarily CAM

Re: Thread milling

Gears Esteemed Contributor Gears Esteemed Contributor
Gears Esteemed Contributor

You could enable the display of the arrows in the display options of the operation or you use different colors for engage and retract paths.

These visual helpers are easy to set up and there is nothing to remember.

Stefan Pendl, Systemmanager CAx, HAIDLMAIR GmbH
Production: NX10.0.3, VERICUT 8.1, FBM, MRL 3.1.7 | TcUA 10.1 MP7 Patch 0 (10.1.7.0) | TcVis 11.4
Development: C (ITK), .NET, Tcl/Tk Testing: NX12.0 | AWC 3.4 Preparing: NX12.0

Employees of the customers, together we are strong Smiley Wink
How to Get the Most from Your Signature in the Community
NX Customization - Best Practice Guide

Re: Thread milling

Gears Legend Gears Legend
Gears Legend

It would be nice if the you could control the feed into the hole when cutting bottom up. Now it either rapids into the hole (witch can cause a heart problem) or it feeds from the clearance plane.

NX knows the thread dimensions, knows were to start and end, so why not give the option to rapid to thread ending, feed into hole and start cutting up?

 

Patrick Delisse
KMWE - DutchAero
NX 12.0, TC 11.2, CAMPOST V22, Vericut 8.2, TDM 4.8
C#, VB, .NET

Re: Thread milling

Gears Esteemed Contributor Gears Esteemed Contributor
Gears Esteemed Contributor

Could you create an ER for extending the engage move to the top of the threaded hole including the top offset, so I can create a "me too" request at GTAC?

Stefan Pendl, Systemmanager CAx, HAIDLMAIR GmbH
Production: NX10.0.3, VERICUT 8.1, FBM, MRL 3.1.7 | TcUA 10.1 MP7 Patch 0 (10.1.7.0) | TcVis 11.4
Development: C (ITK), .NET, Tcl/Tk Testing: NX12.0 | AWC 3.4 Preparing: NX12.0

Employees of the customers, together we are strong Smiley Wink
How to Get the Most from Your Signature in the Community
NX Customization - Best Practice Guide

Re: Thread milling

Gears Legend Gears Legend
Gears Legend
Will do that and post the ER number
Patrick Delisse
KMWE - DutchAero
NX 12.0, TC 11.2, CAMPOST V22, Vericut 8.2, TDM 4.8
C#, VB, .NET

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