Pang, Anthony, Jonejal, Ajay, Lam, David C. C., and Yuen, Matthew
IIE Transactions. Apr2001, Vol. 33 Issue 4, p345. 11p. 5 Black and White Photographs, 9 Diagrams, 2 Charts.
CAD/CAM systems, RAPID prototyping, MANUFACTURING processes, PROTOTYPES, COMPUTER-aided design, MATHEMATICAL optimization, and PRODUCTION engineering
Rapid Prototyping (RP) technologies have emerged as a powerful set of manufacturing technologies in recent years. While these technologies invariably provide tremendous time savings over traditional methods for the manufacture of design prototypes, most are still quite inefficient. This paper proposes two ideas: (i), that these processes can be significantly optimized by using better process planning; and (ii), that several of these technologies use similar core planning technologies for optimization. The first hypothesis is verified in this paper by presenting an improved process planning system for one RP technology, Laminated Object Manufacturing (LOM). The second observation led us to develop an open architecture planning system for a host of RP technologies. A testbed software system using these ideas has been developed and is presented in this paper. While the methodologies developed can work with the current industry standard STL format for storing object CAD data, the software is planned purely to work using exact solid models and direct slicing methods. [ABSTRACT FROM AUTHOR]
Ding, X. M., Fuh, J. Y. H., Lee, K. S., Zhang, Y. F., and Nee, A. Y. C.
International Journal of Production Research. 9/10/2000, Vol. 38 Issue 13, p3079-3092. 14p. 14 Diagrams, 1 Chart.
MANUFACTURING processes, CAD/CAM systems, COMPUTER-aided engineering, INDUSTRIAL engineering, PRODUCTION engineering, PRODUCTION methods, RAPID prototyping, ELECTRODES, and ELECTRIC metal-cutting
A large number of EDM electrodes are used in plastic injection mold manufacturing. However, electrode design is very time-consuming. This paper introduces a computer-aided electrode design system for plastic injection mold manufacturing. An algorithm to detect sharp corner uncut for electrode design is introduced in the paper. Through this algorithm, sharp corner uncut can be detected by calculating the surface angles at their common edges. Using this system, when electrode boundaries are identified either by the user or through detected sharp corner edges, the electrode tool, its holder and a working coordinate system (WCS) for electrode setting are created automatically. The system has been tested and has proved to be able to shorten the electrode design lead-time significantly. [ABSTRACT FROM AUTHOR]