复杂曲面自动化测量程序生成及分析

着重分析了基于坐标测量机的复杂曲面自动化测量中的测量程序生成和曲面轮廓度评价方法问题。对一张曲面，采用单一测量头，根据曲面的最小曲率半径确定测量头半径，根据曲面精度等级、机床加工能力、曲面的复杂程度等因素确定采样样本大小。利用自适应采样方法，使得采样点的分布完全符合曲率大处采样点多、曲率小处采样点少。评价曲面轮廓度时，针对无基准要求的面轮廓误差采取曲面的最佳匹配，给出了一个参数曲面的最佳匹配算法。

Generation and Analysis of Measuring Program and Error Evaluation in Surface Inspection

A software system for measuring free from surface is introduced.The problems of generating the measuring program and evaluating the profile error are discussed.In the generation of measuring program,for a single surface,the system only uses an unique probe for the reason of radial compersation,the radius of the probe is determined by the minimum radius of curvature of the inspected surface.The size of samples is determined according to the capability of machine tool,the precision level and the complexity of the surface.By means of the self adaptation sampling methed,the distribution of sampling points accords with that the more sampling points are distributed along the surface with greater curvature,and less points along minor curvature.In analyzing the measuring results,a concept of “The Best Match”is applied for evaluating the profile of a surface without requirement of datum in order to decide the position and direction of the nominal surface.The algorithm for implementing“The Best Match”is proviede also in this paper.