基于坐标法的环面蜗杆测量系统

Measuring System of Enveloping Worm based on Coordinate Method

针对现有测量方法存在的问题,基于测量状态与加工状态一致的检测原理,设计了环面蜗杆精度测量原理。通过设置自动标定程序和高精密时栅转台使系统自动建立三维空间的测量坐标系,并利用坐标旋转法测得测头的回转半径。采用随动控制方式来测量环面蜗杆各齿面的点在测量坐标系中的坐标值,从而得到环面蜗杆的精度。系统采用金字塔式的结构使系统更稳定、可靠性强。通过实验,验证了本方案的可行性,测得环面蜗杆螺旋线的误差为±4μm。对系统进行等精度重复性实验,系统的极差为0.9μm,方差分析说明各测量点的误差值无显著差异。

For the problems of measuring methods,based on the measurement status and processing status consistent detection principle,the enveloping worm precision measuring principle is designed.According to the automatic calibration procedure and the high-precision time grating turntable,so that the three-dimensional measurement coordinate system is created automatically by the system,and the probe radius of gyration is measured by using the coordinate rotation method.By using servo control method to measure the enveloping worm tooth surface coordinate values of each measurement point in the coordinate system,and the enveloping worm accuracy is obtained.The pyramidstyle structure is used to makes the system more stable,reliable.The experiments show that the feasibility of the program,and the measured accuracy of enveloping worm helix reached±4μm.Repeating the same precision experiments of system,the range of system reached 0.9μm,the variance analysis shows that the error value of each measurement point is no significant difference.