Intelligent Design and Manufacturing

The progressive opportunity of international markets has led to significant new competitive pressures on industry. Recently, this has seen changes in organizational structures at the product design level through the prologue of computer-integrated manufacturing (CIM) and concurrent engineering (CE) philosophy, and is now seeing changes in industry structures as companies build worldwide manufacturing relationships. Automatic feature recognition from computer-aided design (CAD) systems plays an important key toward CAD/computer-aided manufacturing (CAM) integration. Different CAD packages store the information related to the design in their own databases. Structures of these databases are different from each other. As a result, no common or standard structure that can be used by all CAD packages has been developed so far. For that reason, this chapter will propose an intelligent feature recognition methodology to develop a feature recognition system which has the ability to communicate with various CAD/CAM systems. The system takes a neutral file in initial graphics exchange specification (IGES) format for 3-D prismatic parts as input and translates the information in the file to manufacturing information. The boundary representation (B-rep) geometrical information of the part is analyzed by a feature recognition program on the basis of object-oriented and geometric reasoning approaches. A feature recognition algorithm is used to recognize different features such as step and holes.

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