Research on CAD Feature Modeling Technology of Reverse Engineering

In our country, the research of feature modeling technology for reverse engineering has two types, which are based on solid and based on line-surface. This paper studies the feature modeling technology for complex product which uses dot image of slicing contour as original information based on solid feature. The feature modeling system consists of two parts: programming software of automatic modeling and interface software. The function of programming software, which runs on Windows platform, is to perform programming automatically in order to realize solid modeling, complete data processing, recognize feature and construct feature tree. The interface software implements in general CAD modeling software environment. Its function is to achieve automatic modeling and complete 3D reconstruction. Theoretically, it will establish a knowledge system that includes mathematics expression of dot image of slicing contour, feature recognition, CSG feature tree construction. Practically, it will carry out automatically 3D reconstruction of complex products of having various shapes and more dies cavity, for product innovation design based on prototype establishes the foundation.