精密机床电主轴静压轴承制造误差对性能的影响  

Study on Influence of Manufacturing Errors on Performance of Spindle Hydrostatic Bearing in Precision Machine Tool

作　　者：贾谦 阮琪 王贺[4] 吴世杰 崔展 闫菲菲 杨帅 JIA Qian;RUAN Qi;WANG He;WU Shijie;CUI Zhan;YAN Feifei;YANG Shuai(Department of Mechanical Engineering,Xi'an Jiaotong University City College,Xi'an 710018,China;Institute of Mechanical System Control and Robot Application,Xi'an Jiaotong University City College,Xi'an 710018,China;China National Inspection West Inspection Co.,Ltd.,Xi'an 710032,China;Key Laboratory of Modern Design and Rotator Bearing System of Ministry of Education,Xi'an Jiaotong University,Xi'an 710049,China;School of Mechanical and Precision Instrument Engineering,Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]西安交通大学城市学院机械工程系,西安710018 [2]西安交通大学城市学院机械系统控制与机器人应用研究所,西安710018 [3]中检西部检测有限公司,西安710032 [4]西安交通大学现代设计及转子轴承系统教育部重点实验室,西安710049 [5]西安理工大学机械与精密仪器工程学院,西安710048

出　　处：《机械科学与技术》2023年第8期1242-1248,共7页Mechanical Science and Technology for Aerospace Engineering

基　　金：科技部创新方法工作专项(2019MO10203);2022年陕西省教育厅研究计划项目(22JK0446)。

摘　　要：分析了精密机床主轴静压轴承节流器孔径d_(0)、轴承半径间隙h_(0)、油腔长度L和油腔宽度B等参数的制造误差,选取了制造误差影响较大的节流孔径d_(0)和半径间隙h_(0)作为分析的对象;建立了考虑节流孔径误差ε_(d)和半径间隙误差ε_(h)的静压轴承性能计算模型,计算分析了ε_(d)和ε_(h)影响下的轴承刚度J和回转精度e,并通过试验对理论分析结果进行了验证。研究结果表明:制造误差ε_(d)和ε_(h)对J的影响随载荷W的增加而增大,W为600 N、ε_(d)为0.05 mm时的J值是ε_(d)为-0.05 mm时的1.34倍,ε_(h)为10μm时的J值仅为ε_(h)为-10μm时的29.9%;对于e,ε_(d)会带来1μm左右的影响,ε_(h)会带来2μm左右的影响。The manufacturing errors of the hydrostatic bearing throttle aperture d_(0),bearing radius clearance h_(0),oil cavity length L and oil cavity width B of the precision machine tool spindleare analyzed,and the throttle aperture d_(0) and radius clearance h_(0) that have a greater impact on manufacturing errors as the object are selected.A calculation model for hydrostatic bearing performance considering the throttle aperture error ε_(d) and radius clearance error ε_(h) is established.The bearing stiffness J and rotation accuracy e under the influence of ε_(d) and ε_(h) are calculated and analyzed,and the theoretical analysis results are verified by experiments.The research results show that the influence of manufacturing error ε_(d) and ε_(h) on J increases with the increase of load W.When W is 600 N and ε_(d) is 0.05 mm,the value of J is 1.34 times that when ε_(d) is -0.05 mm,and ε_(h) is 10μm.The J value atε_(h) is only 29.9% whenε_(h) is-10μm;for e,ε_(d) will bring about 1μm,and ε_(h) will increase about 2μm influence.

关 键 词：精密机床 静压轴承 制造误差 刚度 回转精度 

分 类 号：TH133.36[机械工程—机械制造及自动化]