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Title: A hybrid method for recognition of undercut features from moulded parts
Authors: Ye, X.G. 
Fuh, J.Y.H. 
Lee, K.S. 
Keywords: Feature recognition
Mould design
Undercut feature
Issue Date: Dec-2001
Citation: Ye, X.G., Fuh, J.Y.H., Lee, K.S. (2001-12). A hybrid method for recognition of undercut features from moulded parts. CAD Computer Aided Design 33 (14) : 1023-1034. ScholarBank@NUS Repository.
Abstract: Products manufactured by moulding processes, such as injection moulding or die casting, are called moulded parts. This paper describes a hybrid method to recognise undercut features from moulded parts with planar, quadric and free-from surfaces. The hybrid method takes advantage of graph-based and hint-based approaches. Various undercut features, including interacting undercut features, are defined by extended attributed face-edge graphs (EAFEG). Unlike conventional graph-based methods, which recognise features by graph matching, the new approach recognises the undercut features by searching the cut-sets of subgraphs. Face properties and parting lines are used as hints to guide the search of cut-sets. To recognise undercut features from parts with free-form surfaces, a convex-hull algorithm is used to determine the face properties (positive, negative and horizontal). The case study shows that the proposed method can recognise various undercut features successfully. © 2001 Elsevier Science Ltd. All rights reserved.
Source Title: CAD Computer Aided Design
ISSN: 00104485
DOI: 10.1016/S0010-4485(00)00138-X
Appears in Collections:Staff Publications

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