NX10 replacing one surface with a different one

[longroadtrip]

i am trying to entirely replace one surface with a very similar one. its the hull of a yacht so lots of curvature in all directions.

I have tried the 'replace' command, corrected all the edges etc but it is coming up with the message saying "unable to replace features" but giving no clue as to the problem.

I have successfully used the replace command on simpler surfaces so i know it works.

Is there any other way of doing this or tips to help?

Thanks

 

[jerry1423]

Wen the Replace Face command is used make sure the boundry edges of the new surface extend beyond what the initial surface is.
For myself I like to see a good amount of excess surface in anticipation for future revisions.

 

[RKulchy]

Are the surfaces in the same part file or different files? If they are in different files you could try to unsew the surfaces you dont want in your current file, export the surfaces you want from the new file and import them into the file you want to contiue working in, and then sew them back together.

If the edges of the removed surfaces and the new surfaces are not exact matches you will need to use the Trim and Extend feature to correct any gaps/over laps. You can use Examine Geometry and only examine for Sheet Boundaries to determine where the openings are in your part file. The openings are why a sewn sheet does not turn to solid.

 

[longroadtrip]

looks like it was because when the surfaces, as an IGS file, was brought in it was just opened in NX, rather than imported. Importing seems to have sorted the problem. just got to rebuild the rest of model with the newly imported surface. a lesson for next time.

thanks for the suggestions

 

[Toost]

The replace face isn't really doing a "replace", What it does is try to adapt the rest of the model to this new face, I.e it will try trim and or extend the adjacent faces to adapt to this new face.
- the shape of the "replaced" face is of less importance in this. The important thing is that NX can trim / extend the adjacent.
See the illustration on how NX in this very simple case extends/ trims all faces to adapt to the new shape.
Maybe this understanding can give a clue on what is the problem area on your model.


Regards,
Tomas