大螺旋升角螺纹三行法测量的测值计算及应用程序鞍山机电学校孙德柱辽宁省机械研究院薄春辉一、引言三针法是测量螺纹及蜗杯中径的常用方法之一．它具有测量简单，方便，精度高的特点。但是，在常用的计算公式及数据中，大多没有考虑螺旋升角对测量的影响，事实上，当螺旋... Large Spiral Threaded Threaded Three-Line Measurement Measurement Calculation and Application Anshan Electrical and Mechanical School Sun Dezhu Liaoning Institute of Machinery thin spring Hui I. Introduction Three-pin method is to measure the thread and the diameter of the worm one of the common methods. It has the measurement of simple, convenient, high precision features. However, most commonly used calculation formulas and data do not consider the effect of helix angle on the measurement, in fact, when the helix ...