目前,对于圆度误差的评定,普遍采用将误差曲线放大(如用圆度仪测出的误差放大曲线图),然后用同心圆母板或圆规作图按最小条件(最小区域)来求得被测截面的圆度误差值。但是,在作放大的误差曲线时,由于对被测圆并不是真正按等比例放大,因此这样的放大误差曲线与被测的真实的圆曲线图形既不相等,也不 At present, for the evaluation of roundness error, it is commonly used to enlarge the error curve (such as the error amplification curve measured by the roundness meter) and then obtain the minimum condition (minimum area) by using a concentric master or compass Circularity error of measured section. However, when making the amplified error curve, since the measured circle is not really enlarged in equal proportion, such an amplification error curve is neither equal to the true circular curve graph under test nor