螺纹是在圆柱工件表面上,沿着螺旋线所形成的,具有相同剖面的连续凸起和沟槽。在机械制造业中,带螺纹的零件应用得十分广泛。用车削的方法加工螺纹,是目前常用的加工方法。 Threads are continuous protuberances and grooves of the same profile formed along the helix on the surface of a cylindrical workpiece. In the machinery manufacturing industry, threaded parts are widely used. With the turning method of processing thread, is the commonly used processing methods.