Application Of Feature Recognition From SolidModels To CMM Technology

Abstract

Recent research has produced a suite of powerful generic algorithms for identifying features on solid models, and after further refinement they are now capable of analysing the geometry of complex engineering components. In addition, a graphical user interface (GUI) has been developed for human-computer interaction. The main algorithm has also been embedded in a commercially available computer aided manufacturing (CAM) package which assists the manufacturing engineer in the production of NC code for machine-tools. A second application for the feature recognition engine is now being investigated, namely that of interaction with co-ordinate measuring machine (CMM) technology. Recent research has indicated that comparing a manufactured component (or batch of components) with a computer generated solid model gives a quick and highly accurate set of deviation data. Similarly, a solid model can be constructed from CMM probe data which represents the component tested. Identification of significant features within the solid model further assists the process by allowing the CMM operator to select areas of importance which have been suggested by the feature recognition system.