旋转法测量大半径圆弧样板

Revolving measurement of large radius arc template

提出了在万能工具显微镜上采用坐标平移和旋转的"旋转法"代替"弓高弦长法"在圆弧轮廓上进行均匀、多次选点,测量大半径短圆弧样板。简要介绍了"旋转法"的原理、测量方法,并应用"旋转法"实例测量进行误差分析,从而验证了"旋转法"能减小形状误差对测量半径精度的影响,也优于"弓高弦长法"的测量精度,是具体测量大半径圆弧样板活动中的一个实用方法。

Taking the place of bowstring measuring, revolving method which realizes measurement through translating and revolving of coordinates on universal tool maker＇s microscope can be used to measure large radius short are template by selecting the measuring point along the arc uniformly and repeatedly. Principle, procedure and error analysis example of revolving method were briefly introduced. Those results showed effects of precision in measuring are radius from form error could be reduced, and the precision of this method was much better than that of bowstring method. Thus, revolving method is an idea choice for measuring large radius arc template.