System and method for part process feature detection in three-coordinate numerical control machining

The invention relates to a system and a method used for detecting part machining features in 3-axis numerical control machining in the technical field of computer integrated manufacturing. The system comprises a feature detection system integration platform, a tool information renewal module, a part information input module, a machined surface determination module, a plane machining method generating method renewal module, a plane machining method generating module, a plane machining method feasibility detection module, a characteristic factor extracting module, a characteristic factor optimal selection module, a machining feature output module, a tool information base and a plane machining method generating method base. The invention can achieve feature detection of complex parts in the environment of 3-axis numerical control machining; the machining features are clustered by surfaces, have no fixed topological structure, are independent of a predetermined feature pattern base, and can explain complex featur