Surface Problem

[aminhas]

Can anyone help me with this issue? I’m facing problems offsetting the highlighted surfaces due to high curvature.

Kind Regards,

Adnan

[tbraxton · Accepted solution]

Did you try the suggested actions shown in the error message?

Recommended actions:
Make a quilt from good surfaces, offset the quilt make patches over missing surfaces.

Copy all of the surfaces that can be offset and exclude the problem surfaces flagged by the tool. You will then have an open quilt at the offset value which you would then manually close the holes left in the offset.

You can try the approximate offset option which may offset all of the surfaces.

https://support.ptc.com/help/creo/creo_pma/r12/usascii//index.html#page/part_modeling/part_modeling/To_Approximate_Offset_Surfaces.html# 

[aminhas]

Dear Sir,

Thank you for your kind reply. Please see the attached part file. I followed the steps you mentioned but was only able to pick a single surfae, not the whole surface. Could you kindly guide me on where I might be going wrong?

Kind regards,
Adnan

[tbraxton]

Please post the data file (STEP file?) that you used to create the import feature (id40) shown in your model tree in the original post.

[aminhas]

Sure. I have attached the STEP file that I used to create the import feature (id40) shown in the model tree. Please let me know if you need anything else.

[tbraxton]

Is this what you are attempting to do? Offset the topology of the STEP import by 0.1 mm outward as shown below?

[tbraxton]

Here is a Creo 10 model with two bodies; 1 (grey color) created from the STEP import and body 2 which is offset 0.1 mm outward from the outer surface of body 1 and solidified. Body 2 is seen in yellow below. Note that the offset is using the automatic fit option to generate a closed quilt for solidification. This is a total hack to generate a solid model so do not hold this method as best practice. The STEP data is potentially problematic if you are using it as the foundation for engineering or analysis purposes. It is messy and not well constrained to use as a foundation to build a robust model. Depending on what your objective is you may consider cleaning up the STEP or filtering/excluding geometry once you bring it into Creo for use a parent to newly created features.

[aminhas]

No — I need to offset inside by 0.15 mm, not outward. Can you guide how to robust model? It's scan data of actual part I thought not properly 

[aminhas]

Sir,

Please review the attached STEP file of the part; this should help you better understand what I am trying to achieve.

May I also ask one more thing: do you have experience converting STL files into solid models in Creo or any other software? If so, I would appreciate it if you could share the details or workflow.

Thank you again for your kind support.

Kind regards,
Adnan

[tbraxton]

You can reverse the direction of offset in the model I posted to get the 0.15 inward offset geometry. The yellow body is offset inward by 0.15 shown here.

For reverse engineering of scan data (including .stl files) I would use software such as Geomagic Design X to create geometry fit for purpose within Creo Parametric.