利用有限元法对在一定预紧力作用下接长丝杠接头部分螺纹滚道的形状误差及螺纹螺距误差进行了分析,从而得出保证丝杠精度所应采取的措施.文中论述了模型简化、单元体划分、等效厚度计算、边界条件的确定、丝杠弯曲等问题,同时还用电测法对计算结果进行了验证,为采用装配方法以获得高精度长丝杠接头的设计、制造及装配调整提供了理论依据. The finite element method was used to analyze the shape error and thread pitch error of the thread raceway of the lead screw joint under certain pretightening force to get the measures to be taken to ensure the accuracy of the lead screw.The paper discussed the model simplification , Unit division, equivalent thickness calculation, the determination of the boundary conditions, screw bending and other issues, but also with the electrical measurement method to verify the results of the calculation, in order to adopt the assembly method to obtain high-precision ball screw connector design, manufacture And adjust the assembly provides a theoretical basis.