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- W965931810 abstract "Z-map is a special form of discrete nonparametric representation in which the height values at grid points on the xy-plane are stored as a 2D array z[i,j]. While Z-map is the simplest form of representing sculptured surfaces and it is the most versatile scheme for modeling nonparametric objects, the application of Z-map to die machining (eg, finish cutting, clean-up cutting) aroused much controversy over its weaknesses: accuracy, singularities (e.g., vertical walls), and some excessive storage needs. Although it has such limitations, much research on the application of Z-map can be found in various articles. However, research involving systematic analysis of Z-map to represent sculptured surfaces or CL (cutter location) surfaces for mold and die machining is rather rare. Presented in this paper are the following: evaluation of the height value of a point which is not a pre-defined grid point, exact (within machining tolerance) Z-map representation of sculptured surfaces containing vertical walls and sharp edge lines (i.e., the common edges of adjoining faces which violate tangential continuity) by adopting a Core Z-map or EZ-map (Extended Z-map) model, and several methodologies of computing CL surface in a Z-map form. Also presented are examples of die machining in industry." @default.
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- W965931810 date "1997-01-01" @default.
- W965931810 modified "2023-09-25" @default.
- W965931810 title "The validity of Z-map model for mold and die machining" @default.
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- W965931810 doi "https://doi.org/10.1007/978-0-387-35291-6_15" @default.
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