Journal
COMPUTERS IN INDUSTRY
Volume 65, Issue 4, Pages 537-549Publisher
ELSEVIER
DOI: 10.1016/j.compind.2013.12.005
Keywords
MBD process model; Machining ontology; Modeling ontology; Reversed creation method
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Traditional machining process planning, which passes manufacturing information through 2D drawing, fails to meet the requirement of current 3D manufacturing environment. Thus, model based definition technology, which uses 3D technology to upgrade the current manufacturing capacity, comes into being. This paper focuses on the creation methods of 3D machining process model. In the first place, the relation between machining knowledge and 3D modeling knowledge has been analyzed, establishing machining ontology and modeling ontology. Then, forward creation method and reversed creation method of machining-knowledge-based 3D process model are proposed. In forward creation method, to drive 3D modeling with machining knowledge, process model is created in commercial CAD platform with modeling ontology transferred from machining ontology for knowledge reasoning through the decision tree constructed from training set and test set. Reversed creation method is established by identifying and suppressing the volumetric machining features and surface machining features after building attributed adjacent graph of process model, and the machining knowledge contained in 3D process model is extracted for subsequent reuse. Finally, the validity of this method is verified with the proposed prototype system. (c) 2013 Elsevier B.V. All rights reserved.
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