一、前言 近年来,在实现机床自动化的同时,对提高加工精度的呼声越来越高。而机床的结构变形是影响提高加工精度、加工效率的上个主要因素。机床结构变形按结构负载可分为三种:静变形、热变形和动变形。但是从实验上、理论上对机床结构的静、热、动变形的解释尚未完全清楚。其? I. Introduction In recent years, while realizing the automation of machine tools, the voice of raising the processing precision is getting higher and higher. The structural deformation of the machine tool is to improve the processing accuracy, processing efficiency of the last major factor. Machine structure deformation according to the structure load can be divided into three types: static deformation, thermal deformation and dynamic deformation. However, theoretically, the explanation of the static, dynamic and dynamic deformation of the machine tool structure has not been fully understood. its?