摘要
回转体测量机由回转工件台和测量架组成,能够在工件一次装卡条件下对回转体零件的内外轮廓参数进行高精度的快速检测。根据该测量机的结构特点,分析了测量机的各项系统误差,提出了测量架运动直线与回转轴线之间平行度、测头的测量方向与回转轴线的垂直度、测头偏心等系统误差的标定方法,建立了标定数学模型,剔除了由于标准件加工、安装等不确定度对标定的影响,降低了对标准件的加工精度要求。进行了标定和对比测量实验,结果表明,测量机标定后的系统误差小于2μm,对直径293.5mm、高度1500mm的回转体工件进行测量时,直径误差小于5μm,满足高精度测量要求。
The revolving body measuring machine which is comprised of a rotary table and independent measuring bays can inspect all geometric parameters of the interior and exterior outlines of a part with revolving body quickly and accurately in a single clamping. Based on the structural features of this machine, its systematical errors were analyzed, and calibration methods of these errors, such as parallelism, perpendicularity and eccentricity errors between motion line of the measuring bay and axis of the rotary table were put forward. After calibration and comparison experiments, the results show that the systematical error is less than 2μm, the diameter error is less than 5μm when testing the revolving part which geometric parameters are 293.5mm in diameter and 1500mm in height. The requirement of high-precision measurement can be met.
出处
《工具技术》
2011年第2期112-115,共4页
Tool Engineering
关键词
回转体
测量
系统误差
标定
数学模型
revolving body
measurement
systematical error
error calibration
mathematical model
