To determine the thermal deformation of ball screw in actual working condition, a novel method for determining thermal deformation of ball screws in complicated working condition is proposed based on G-code and finite-element (FE) method. In the complicated working condition, it is difficult to obtain and import the nut movement into FE model due to the complex nut movement. In this research, the nut movement is directly determined from G-code by MATLAB code programming. The nut location is recorded with time in a file. The thermal parameters can be determined according to the nut speed with time as well. In the implicit FE analysis, the nut location is read from the input file instead of nut location calculation before every time step. And then, the effect of factors, such as working condition and materials, on thermal deformation reduction of ball screw is studied. The thermal deformation reduction of ball screws under different rotational speed, actual working condition, and different axial elastic modulus of composites is discussed, which can provide the guidelines to evaluate the thermal deformation reduction and design the composite in improved ball screws.

为了确定滚珠丝杠在实际工况下的热变形，提出了一种基于G代码和有限元（FE）方法确定滚珠丝杠在复杂工况下的热变形的新方法。在复杂的工作条件下，由于复杂的螺母运动，很难获得螺母运动并将其导入FE模型。在这项研究中，螺母运动是通过MATLAB代码编程直接从G代码确定的。螺母位置随时间记录在文件中。还可根据螺母速度随时间确定热参数。在隐式有限元分析中，在每个时间步之前从输入文件中读取螺母位置，而不是从螺母位置计算中读取螺母位置。然后，诸如工作条件和材料等因素的影响，研究减少滚珠丝杠的热变形。讨论了不同转速，实际工况和复合材料轴向弹性模量不同时滚珠丝杠的热变形减小情况，为评估改进的滚珠丝杠的热变形减小和设计复合材料提供了指导。