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Hi Mr. Sergiusz

That's great, what methods do you use in Feature Recognition? Please let me know about.

Faithfully 

Jaider: You mean automatic manufacturing features extraction using rule-based? Not quite. I have employed rule-based techniques to extract parameters and geometric attributes from CAD models, 

Take  a look...

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Hi Mr. Brian

i use rule-based techniques to recognize features from STEP file, by analyzing geometric and topological data after its extraction, for example:

IF STEP data contain two ADVANCED_FACEs of a cylindrical surface type, and a planar surface

AND the two ADVANCED_FACEs of the cylindrical surface type chare two common linear edges

AND the planar surface is bounded by two circular edge loops (inner loop and outer loop)

AND the two ADVANCED_FACEs of a cylindrical surface type chare the two edges of the inner loop of the planar surface

THEN the feature is identified as a shoulder feature (Turning feature)

You can check the link below.  I'll check what you sent me. Many thanks sir

Best regards

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what do you mean "by analyzing geometric and topological data after its extraction"? more specific "after its extraction".  Actually you extract the feature by implementing rule-based method. 

Hi,

I mean analyzing geometric and topological data after that they are extracted from STEP file.

I recognize features by implementing rule-based method.