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Machining contact point issue streamline [fixed axis]

Pioneer
Pioneer

Hi everyone, as you can see on the attached pictures, I get an undesired result regarding the machined area [looking to the contact point at start&end of the path].

For streamline a large portion is not machined, whilst this is not the case for surface area.

Both projection direction is towards drive, helical pattern. Am I mssing a special setting, expected extend or similar to do the job, but no.

Thanks for your help, Bert Claessen, NX10.0.3.5 MP11

 

StreamlineStreamlineSurface AreaSurface Area

5 REPLIES

Re: Machining contact point issue streamline [fixed axis]

Genius
Genius

Re-post, seems to have issues posting.

 

streamlines_tw.jpg

Re: Machining contact point issue streamline [fixed axis]

Siemens Genius Siemens Genius
Siemens Genius

Hi,

 

Can you please share the prt showing these two results? might help to better understand the root cause and recommend ways to resolve it.

 

 

Eddy Finaro
NX CAM Product Manager
Siemens PLM

Re: Machining contact point issue streamline [fixed axis]

Pioneer
Pioneer

Hi Eddy will have access to the part on monday.

Will upload it, is prt allowed?

Bert Claessen

Weir Minerals Venlo

Re: Machining contact point issue streamline [fixed axis]

Pioneer
Pioneer

Hi Eddy see attached PRT file for your evauation.

Thanks in advance for your help.

This is a geometry item that needs to be machined very often and due to machining method the fillet needs to be machined separately.

Therefor looking for the easiest and most convenient NX operation type.

 

Re: Machining contact point issue streamline [fixed axis]

Siemens Genius Siemens Genius
Siemens Genius

Hi,

 

The reason you see the difference is that the streamline drive is a rulled surface between the two flow curves you selected. with projection Normal to Drive that will push the tool normal to the rulling (along pink arrows). The surface area uses the fillet as drive so projection would follow the green arrows. see the following cross section with preview of the stremline visible:

Drive and ProjectionDrive and Projection

 

To resolve this, if you could define cross curves in streamline it would make the Drive surface like a Through Curve Mesh and the projection would result similar as with Surface area. Sinace there are no edges to select as cross curves, in NX 10.0.X such would involve tedious modeling work.

in NX 11.0.1 and on you can ask the system to fit curves on part. in this case you can force as many curves you like (20) normal to a selected curve (red arrow). with this option - this are the cross curves that streamline would use: 

Cross Curves on Part.jpg

and the generated path would be what you are looking for:Streamline path using on part cross curvesStreamline path using on part cross curves

In general, customers using streamline would find the ability to add on part flow / cross curves without modeling work very powerful.

 

Yours

Eddy Finaro
NX CAM Product Manager
Siemens PLM

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