论文信息 - A CAD/CAM system from 3D coordinate measuring data

A CAD/CAM system from 3D coordinate measuring data

SUMMARY A CAD/CAM system with some new numerical methods is presented in this paper. This system mainly consists of two stages. In stage 1, the least squares method is applied to fit a best form of parametric surface to a set of data points obtained from a 3D coordinate measuring machine, with the errors caused by the probe compensated. In stage 2, from the best form of parametric surface obtained in stage 1, a new efficient method—adaptive path planning—which has better performance than the old parametric method is developed to generate the cutter path. By application of adaptive path planning, machining time can be reduced. By transforming the cutter contact path to the cutter location path, the curvature method for detecting gouging is presented by which a tool path with gouging avoidance can be generated.

[1] Rida T. Farouki,et al. Exact offset procedures for simple solids , 1985, Comput. Aided Geom. Des..

[2] G. W. Vickers,et al. Ball-Mills Versus End-Mills for Curved Surface Machining , 1989 .

[3] Da-Pan Chen,et al. The Use of a Tension Parameter in Surface Modeling , 1987 .

[4] Rida T. Farouki,et al. Surface Analysis Methods , 1986, IEEE Computer Graphics and Applications.

[5] Shinji Kawabe,et al. Generation of NC Commands for Sculptured Surface Machining from 3-Coordinate Measuring Data , 1980 .

[6] David F. Rogers,et al. Mathematical elements for computer graphics , 1976 .

[7] Byoung Kyu Choi,et al. Compound surface modelling and machining , 1988 .

[8] Bahram Ravani,et al. Offset Surface Generation and Contouring in Computer-Aided Design , 1987 .

[9] Gregory C Loney,et al. NC machining of free form surfaces , 1987 .

[10] I. Faux,et al. Computational Geometry for Design and Manufacture , 1979 .