The future of computer-aided design (CAD) and computer-aided manufacturing
(CAM) depends on the ability of their two processes to communicate with each
other and with intermediate manufacturing database. Therefore, the development of
a successful approach to the integration of CAD and CAM will require solution to
several fundamental problems in planning and geometric reasoning. The first
problem is the interface between CAD and CAM, that automatic feature
recognition is an indispensable technique to solve this problem. We address this
problem by developing an algorithm, which is considered an effective approach to
extraction and of hybrid manufacturing features of symmetrical parts. The
developed algorithm is based on the syntactic pattern primitive concept supported
by production rule technique. This approach is considered a powerful tool applied
to feature recognition field for symmetrical parts.