在一般机械工厂中,对基本型式为阿基米德螺旋线的大模数蜗杆的轴向齿形误差,通常都在万能显微镜上利用轴切法进行测量。但用轴切法测量是不够精确的。特别当蜗杆齿高超过测量刀刃口长度及被测齿面呈凸形时(加工中极易出现凸状齿面),测量者判断齿形误差值就比较困难。为了提高测量齿形的精度,我们设法在万能显微镜上利用 In a typical machine shop, the axial toothed error of a large-modulus worm with a basic type of Archimedes spiral is measured axially using a universal microscope. However, the measurement with the shaft cut is not accurate enough. Especially when the worm tooth height exceeds the measured length of the cutting edge and the measured tooth surface is convex (very prone to convex tooth surface during machining), the measurement of the toothed error value is more difficult. In order to improve the accuracy of measuring tooth shape, we managed to use it on a universal microscope