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https://doi.org/10.1016/S0010-4485(00)00138-X
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. https://doi.org/10.1016/S0010-4485(00)00138-X | 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 | URI: | http://scholarbank.nus.edu.sg/handle/10635/54272 | ISSN: | 00104485 | DOI: | 10.1016/S0010-4485(00)00138-X |
Appears in Collections: | Staff Publications |
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