Statics modeling and analysis of linear rolling guideway considering rolling balls contact
Statics modeling and analysis of linear rolling guideway considering rolling balls contact
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DOI：
10.1177/0954406214531943
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发表时间：
2015-01
期刊：
影响因子：
--
通讯作者：
Wei Sun;Xiangxi Kong;Bowen Wang;Xingzhan Li
中科院分区：
文献类型：
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作者：
Wei Sun;Xiangxi Kong;Bowen Wang;Xingzhan Li
直线滚动导轨由导轨、滑架、滚珠及其它附件组成，滚珠与槽道之间有大量的滚动界面。对于这样一个复杂的非线性机械系统，获得其在不同载荷作用下的静态变形和垂向刚度，对于导轨的结构设计和数控机床的力学分析具有重要意义。因此，本研究的重点是发展静力学建模技术的线性滚动导轨的分析和有限元方法，考虑滚动球接触。首先，利用赫兹接触理论和实验结果修正，提出了一种精确的静力学分析建模方法。然后，在考虑滚动体与槽道接触的基础上，研究了精确的有限元建模。为提高分析效率，将导轨的整体有限元模型改为部件有限元模型。最后，利用建立的分析模型和部件有限元模型，分析了载荷和预紧力对单滚珠和整个导轨系统静力学特性的影响。本文的研究建议可为建立精确的直线滚动导轨动力学模型提供参考。
The linear rolling guideway is composed of rail, carriage, rolling balls, and other accessories and contains a large number of rolling interfaces between the rolling balls and the grooves. For such a complex nonlinear mechanical system, it is very significant to obtain the statics deformation and vertical stiffness under different loads for the structural design of guideway and mechanical analysis of Computer Numerical Control (CNC) machine tool. Therefore, the focus of this study is on the development of statics modeling techniques of the linear rolling guideway by analytical and finite element methods, considering the rolling balls contact. First, an accurate statics analytical modeling method was proposed by using the Hertz contact theory and revision of experiment results. Then, on the basis of considering contacts between rolling balls and grooves, the precise finite element modeling was studied. To improve the efficiency of analysis, the full finite element model of guideway was replaced by the component finite element model. At last, the created analytical and component finite element models were applied to analyze the effects of load and preload on the statics characteristics of single ball and the whole guideway system. The proposal of current study may provide a reference to create the precise dynamics model of linear rolling guideway.