ABSTRACT
The paper presents a new feature recognition technique which is considered the first
module of an implemented computer aided process planning system [CAPP] for turning
parts. The developed feature recognition technique involves the reconstruction of the
part design features (lines, arcs), which are extracted from the CAD file in the form of
manufacturing features (16 external features, and 10 internal features). It includes also
retrieval of important data related to the created features (dimensions, tolerances and
roughness) to be an efficient tool in process planning. Output data are displayed to the
user as design features, and manufacturing features with all required data technique for
manufacturing. A case study is given to demonstrate, and verify the proposed
algorithm.