《Table 1 ball-screw parameters》

《Table 1 ball-screw parameters》   提示：宽带有限、当前游客访问压缩模式
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《Modeling approach for axial contact stiffness of ball screws》


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The machining technology of balls is more mature compared with that of raceways.Therefore micro-topography of ball surface is neglected.The surface of raceway is formed by grinding.The algorithm flow chart for the numerical contact stiffness simulation by MB fractal theory is shown in Fig.4.The specifications and the experimental condition of the ball screw are shown in Table 1.According to the machining form，the fractal parameters are estimated.D=1.566 and G=0.32nm are introduced to the fractal theory[26].Parameters of the ball screw studied in the experiment are also introduced to the theoretical method.Axial contact stiffness of the ball screw can be drawn that its value is2.3117×108N/m.The experimental result can be approximately obtained with its value 2.8×108N/m.By comparison，the result gained by the analytical method in this research agrees well with the experimental result is shown in Fig.5.The error between theoretical result and experimental result is 17%，as shown in Fig.6.The error is acceptable in engineering practice.The error is mainly generated by the stiffness contribution of thin oil film between balls and raceways to the experimental result，which causes that the experimental result is greater than the theoretical result.

图表编号XD0020597100    严禁用于非法目的
绘制时间2018.03.01
作者孔德顺、Wang Min、Liu Xuebin、Gao Xiangsheng
绘制单位Beijing Key Laboratory of Advanced Manufacturing Technology,College of Mechanical Engineering and Applied Electronics Technology,Beijing University of Technology、Institute of Standavd Metrology,Chinese Acadmy of Railway Sciences、Beijing Key Laboratory of
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