Finite Element Modal Analysis of Twin Ball Screw Driving Linear Guide Feed Unit Table

Xiangrong Xu, Xianchun Song, Hongkui Jiang, Yanfeng Li, Qunpeng Lu

Abstract


Twin ball screw driving linear feed system has good vibration resistance, high stiffness and fast system response, etc., can effectively decline vibration of NC machine tools generated in the case of high speed and high acceleration and deceleration, so it is used widely in the high-speed and high-precision NC machine tools. This article is focused on the completion of the finite element modal analysis of twin ball screw driving linear guide feed unit table. The modal of single ball screw driving linear guide feed unit and that of twin ball screw driving linear guide feed unit was analyzed, and the results were compared when nuts are located at the left, middle and right positions of twin ball screw driving linear guide feed unit. The results show that under the same vibration shape, the natural frequencies of twin ball screw driving linear guide feed unit are higher than those of single ball screw driving linear guide feed unit, the twin ball screw driving linear guide feed system has smaller vibration and better dynamic properties; different positions of nuts will affect the natural frequencies of twin ball screw driving linear guide feed unit, smaller in the middle position and larger on two ends, so the vibration on the middle position is larger than that on two ends.


DOI
10.12783/dtetr/mime2016/10194

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