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TECHNICAL PAPERS

Automatic Undercut Feature Recognition for Side Core Design of Injection Molds

[+] Author and Article Information
X. G. Ye, J. Y. H. Fuh, K. S. Lee

Department of Mechanical Engineering, National University of Singapore, Singapore 117576

J. Mech. Des 126(3), 519-526 (Oct 01, 2003) (8 pages) doi:10.1115/1.1737379 History: Received March 01, 2003; Revised October 01, 2003
Copyright © 2004 by ASME
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References

Shin,  K. H., and Lee,  K. W., 1993, “Design of Side Cores of Injections Moulds from Automatic Detection of Interference Faces,” Journal of Design and Manufacturing, 3, pp. 225–236.
Zhang, Y. F., Lee, K. S., Wang, Y., Fuh, J. Y. H., and Nee, A. Y. C., 1997, “Automatic Side Core Creation for Designing Slider/Lifter of Injection Moulds,” Proc. of CIRP International Conference and Exhibition on Design and Production of Dies and Molds, Istanbul, Turkey, pp. 33–38.
Shah,  J. J., 1991, “Assessment of Feature Technology,” Comput.-Aided Des., 23(5), pp. 331–343.
Wu,  M. C., and Liu,  C. R., 1996, “Analysis on Machined Feature Recognition Techniques Based on B-rep,” Comput.-Aided Des., 28(8), pp. 603–616.
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Weinstein,  M., and Manoocheri,  S., 1996, “Geometric Influence of Molded Part on the Draw Direction Range and Parting Line Location,” ASME J. Mech. Des., 118, pp. 29–39.
Rosen,  D. W., 1994, “Towards Automated Construction of Moulds and Dies,” ASME Computers in Engineering, 1, pp. 317–323.
Fu,  M. W., Fuh,  J. Y. H., and Nee,  A. Y. C., 1999, “Undercut Feature Recognition in an Injection Mould Design System,” Comput.-Aided Des., 31(12), pp. 777–790.
Farin, G., 1990, Curves and Surfaces for Computer Aided Geometric Design, 2nd edition, Academic Press, Inc, Boston.
Deo, N., 1974, Graph Theory with Applications to Engineering and Computer Science, Prentice-Hall, Inc., Englewood Cliffs, NJ.
Vandenbrande,  J. H., and Requicha,  A. A. G., 1993, “Spatial Reasoning for the Automatic Recognition of Machinable Features in Solid Models,” IEEE Trans. Pattern Anal. Mach. Intell., 15(12), pp. 1269–1285.
Joshi,  S., and Chang,  T. C., 1988, “Graph-Based Heuristics for Recognition of Machined Features from a 3D Solid Model,” Comput.-Aided Des., 20(2), pp. 58–66.
Chen,  L. L., and Woo,  T. C., 1992, “Computational Geometry on the Sphere With Application to Automated Machining,” ASME J. Mech. Des., 114, pp. 288–295.
Unigraphics, 1997, UG/Open API Reference, Volume 1 to Volume 4, Unigraphics Solution Co., Maryland Heights, MO.

Figures

Grahic Jump Location
A molded part and its cavity and core
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Examples of subgraphs and cut-sets in a graph
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Protrusion undercut and its subgraph
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Classification of interacting undercut features
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Interacting undercut features
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Side cores for undercuts of cavities
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The bounding box of a protrusion undercut
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The cavity of a hand phone and its undercut features
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Side cores for the recognized undercut features
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A plastic molding and its undercut features

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