Mokhart, AXu, XunLazcanotegui, L2011-07-222009Journal of Intelligent Manufacturing 20(4):431-445 20090956-5515https://hdl.handle.net/2292/7005Determining the precedence of machining features is a critical issue in feature-based process planning. It becomes more complex when geometric interaction occurs between machining features. STEP-NC, the extension of STEP (ISO 10303) standard developed for CNC controllers, is a feature-based data model. It represents all the geometric and topological product data minus feature interactions. In this paper, machining precedence of interactive and non-interactive STEP-NC features is discussed. Local and global precedence of machining features are defined on the basis of geometric constraints, such as geometric interaction of features and feature approach face and technological constraint such as access direction of the cutting tool. A software tool has been developed to visualize the STEP-NC part model and to generate the graphs of feature interaction and feature precedence. The output can be then used to augment the STEP-NC data in order to generate the optimal sequence of operations.Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/0956-5515/https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htmFeature interactionFeature precedenceProcess planningSTEP-NCMACHINING FEATURESMANUFACTURING FEATURESINTEGRATED-SYSTEM21/2D COMPONENTSRECOGNITIONINTELLIGENTMODELCNCDESIGNREPRESENTATIONJournal Article10.1007/s10845-008-0144-yCopyright: 2008 Springer Science+Business Media, LLChttp://purl.org/eprint/accessRights/RestrictedAccess