Investigation of non-uniform preload on the static and rotational performances for spindle bearing system
Investigation of non-uniform preload on the static and rotational performances for spindle bearing system
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非均匀预紧对主轴轴承系统静态和旋转性能的影响研究
DOI：
10.1016/j.ijmachtools.2016.04.003
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发表时间：
2016-07-01
影响因子：
14
通讯作者：
Hong Jun
中科院分区：
文献类型：
--
作者：
Li Xiaohu;Li Huanfeng;Hong Jun
为了消除主轴在外载荷作用下的挠度，本文提出了一种新型的非均匀预紧主轴轴承系统，并从理论上和实验上探讨了非均匀预紧对主轴系统静态和旋转性能的影响。为了揭示非均匀预紧对外部径向载荷下主轴静态和旋转性能的影响，首先建立等效变换模型来简化施加在轴承上的非均匀预紧。然后采用仿真模型分析不同预紧条件下主轴的可变静态和旋转性能。设计了一种配备主轴轴承系统的试验台，其内部布置了测量系统，以实验研究非均匀预紧力、变化的外部载荷和转速对主轴静态和旋转精度的影响。不同预紧条件下的结果表明，合理等效大小和方向的非均匀预紧可以有效调整主轴旋转中心，补偿主轴旋转误差，从而提高主轴系统在复杂交变工况下的旋转精度。这为通过调整主轴轴承系统上的非均匀分布预紧力来补偿主轴挠度和旋转运动误差提供了一种新的方法。 (C) 2016 Elsevier Ltd. 保留所有权利。
In order to eliminate the deflection of spindle under external loading, a new non-uniform preload for spindle bearing system is proposed in this paper, and the effect of non-uniform preload on the static and rotational performances of the spindle system is explored both theoretically and experimentally. Seeking to reveal the role of non-uniform preload in spindle static and rotational performances under external radial loading, the equivalent transformation model is firstly built to simplify the non-uniform preload applied on the bearing. Then a simulation model is employed to analyze the variable static and rotational performances of spindle under different preload conditions. A test rig is designed to equip with spindle bearing system, inside which the measurement system is arranged to experimentally investigate how the spindle static and rotational accuracy are influenced by non-uniform preload, varying external load and rotating speeds. The results under different preload conditions show that the non-uniform preload with reasonable equivalent magnitude and direction can effectively adjust the spindle rotating center and compensate the spindle rotation error, and thus improves the rotational accuracy of the spindle system under complicated and alternating working conditions. This provides a new compensation method to the spindle deflection and rotational motion error through adjusting the non-uniformly distributed preload on the spindle bearing system. (C) 2016 Elsevier Ltd. All rights reserved.