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Abstract

Feature recognition is the key linking element between CAD and CAPP. Different CAD/geometricmodeling packages store the design related information in their own databases. Structures of thesedatabases are different from each other. Automatic Feature Recognition (AFR) is the process ofextracting such feature data for use in the other stages of product life cycle viz., process planning,CNC code generation and inspection etc. This paper presents different algorithms to extract thedesign data stored in the form of Data Exchange Format (DXF) files and to store such data in anorderly form. . A software program is developed in ‘C++’, for extraction of the features (entity)data from the DXF file. The flow chart of the program is given as an appendix. The paperdemonstrates the working of the algorithms using a set of examples.

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