轴承预紧力对电主轴刚度及使用寿命的影响分析  

Analysis of Influence of Bearing Preload on Rigidity and Service Life of Electric Spindle

作　　者：郭辉[1] 王英为 张亮[2] 杨文华[2] 徐方超[1] 孙凤[1] GUO Hui;WANG Ying-wei;ZHANG Liang;YANG Wen-hua;XU Fang-chao;SUN Feng(School of Mechanical Engineering,Shenyang University of Technology,Shenyang 110870,China;Genertec Shenyang Machine Tool Co.,Ltd.,Shenyang 110023,China)

机构地区：[1]沈阳工业大学机械工程学院,辽宁沈阳110870 [2]通用技术沈阳机床股份有限公司,辽宁沈阳110023

出　　处：《机械工程与自动化》2023年第6期9-11,共3页Mechanical Engineering & Automation

基　　金：辽宁省“揭榜挂帅”科技重大专项资助(2022JH1/10400027)。

摘　　要：电主轴的静刚度是其主要性能指标,是机床加工零件精度和质量的保证。轴承作为电主轴的核心支撑部件,其预紧力的增加或减小对主轴的刚度有着重要的影响,同时预紧力的变化也会影响轴承的使用寿命。为了确定轴承的最佳预紧力,通过仿真分析了预紧力的变化对主轴静刚度、固有频率以及使用寿命的影响。分析结果表明:随着预紧力的增加,主轴的静刚度和固有频率都有明显的提高,但同时降低了轴承的使用寿命。The static stiffness of the electric spindle is the main performance index of the spindle processing and ensure the accuracy and quality of turning parts.As the core support component of the electric spindle,the increase or decrease of bearing preload has a great impact on the strength of the main shaft,and the change of preload will also affect the life of the bearing.For the sake of determine the optimal preload of the bearing,the influence of bearing preload change on the static stiffness,natural frequency and service life of the main shaft is analyzed by means of simulation calculation.The analysis results indicate that the increase of preload greatly improves the static stiffness and natural frequency of the main shaft,but the service life of the bearing is also reduced.

关 键 词：电主轴 静刚度 轴承预紧力 使用寿命 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术]