NX7.5 - Untrim 3

[CAD2015]

I can't get the meaning of Untrim in NX.......
Could somebody give me a practical example of the benefit of using it? Is there an equivalent NX function that does the same modification?

Thanks

MZ7DYJ

 

[kapmnit123]

Hi,
Untrim basically gives you the first and exact patch before any trimming option is done on it.
For example let us say you first created a surface using ruled surface or mesh surface or any other creation method ..now this being a primary surface will be subjected to trimming while creating secondary surfaces (transitions) and getting the complete model.So when you select the trimmed surface for UNTRIM it will yield you the parent(base surface)surface again.
You may say ENLARGE is somewhat like this but additionally you can enlarge it in U and V directions....and frankly speaking before the advent of UNTRIM i used ENLARGE to get back the parent surface (in case you get an unparametrized body and you wish to do some changes on top of it.).
So in total it is more of a reverse engineering tool which helps you regain the primary surfaces.
Best Regards
Kapil Sharma

 

[JohnRBaker]

Also note that starting with NX 8.5 we are introducing a new function called 'Delete Edge' which will allow you to remove individual edges from a surface so that if there were more than ONE trimming operation, you could only remove the edges created by one of the trims and not the others. With the 'Untrim' operation, it's all or nothing. That is, when you apply a Untrim operation to a trimmed surface, ALL the trims are removed and the surface is returned back its actual or original size.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:

To an Engineer, the glass is twice as big as it needs to be.

 

[CAD2015]

Thanks, I have to admit that I couldn't understand your explanation........

MZ7DYJ

 

[kapmnit123]

Hi mz7dyj,
For example if you have a sheet in which the imprints of the holes (hole edges) are left then using "delete edge" you can get rid of that hole portion as if it was never there (just like the synchronous DELETE FACE helps you get rid of blends holes etc.).
I will send you something on this on Monday if you are interested.
Best Regards
Kapil Sharma

 

[Toost]

It is quite common when importing models that either the other system has different tolerances or that "somebody" using the other system did something that all ends up in NX with large gaps and deviations etc. Then one can use untrim to get rid of the trimmings and re-trim in NX to NX tolerances.

Catia V4 was "famous" for loose tolerances / trimmings.


Regards,
Tomas

 

[CAD2015]

Thanks, kapmnit123.
I'll wait for Monday.......

MZ7DYJ

 

[kapmnit123]

Hi mz7dyj ,
As promised i am attaching a ppt herewith.Hope this helps you a bit.This demonstrates only a partial usage of it.(you might be able to leverage it better than me )
Best Regards
Kapil Sharma

 

[CAD2015]

kapmnit123:
Thanks a lot!

MZ7DYJ