AG螺纹中径的分析及测量要素研究

Analysis and measurement of pitch diameter of Ag thread

AG螺纹的中径、螺距和牙型半角是影响螺纹旋合性的主要参数,而螺距和牙型半角误差对螺纹旋合性的影响会直接体现在中径误差上。因此,对AG螺纹中径误差的测量及合格与否的判定是非常关键,保证螺纹装配时有可互换性。

Pitch diameter,pitch and profile half angle of Ag thread are the main parameters that affect screw thread screwing performance,and the influence of pitch and half angle error on screw thread screwing performance is directly reflected in pitch diameter error.Therefore,it is very important to measure the pitch diameter error of Ag thread and determine whether it is qualified or not,so as to ensure the interchangeability of thread assembly.