关键词: CAD, 机床, 三维, W-M函数, 分形粗糙表面, 特征长度尺度参数, 小波分解

Abstract: The CAD system introduced in this paper offeres a working mode by mingling 2D and 3D parametric modeling. This working mode meets the requirements of the basement (including bed, columa, spindle box, table, slide etc.) design. The system attains a series of utility program which solves the following programs: the loading of the parametric sub-structure, the calculation of the modeling, the automate generation of the working drawing, the automatic generation of the crosshatching, the automatic dl-mensionning etc.

Key words: CAD, 机床, 三维, Characteristic length scale parameter, Wavelet decomposition, Fractal rough surface, W-M function