Design of parts characterized by protrusions or depressions

摘要

PROBLEM TO BE SOLVED: To provide a method, a system and a program capable of recognizing a surface representing a recessed feature or a special feature of a B-rep representing a mechanical part. An improved computer implementation method for designing a 3D modeled object representing a mechanical part using a CAD system, comprising providing a B-rep representing the mechanical part. B-Rep has a face and an edge. The method further comprises providing a first set of faces and feature types. The feature type is either a recess feature type or a protrusion feature type. The method further comprises recognizing the second set of faces within the first set by the CAD system. [Selection diagram] Fig. 1