精密铣磨床旋转工作台静压轴承的设计和试验研究  

Design and Experimental Study of Hydrostatic Bearing for Rotary Table of Precision Milling and Grinding Machine

作　　者：曲璠 阮琪 刘朝丰 杨建晨 杨帅 王建磊[4] 贾谦 QU Fan;RUAN Qi;LIU Chaofeng;YANG Jianchen;YANG Shuai;WANG Jianlei;JIA Qian(Department of Electrical and Information Engineering,Xi’an Jiaotong University City College,Xi’an Shaanxi 710018,China;CCIC West Testing Company Limited,Xi’an Shaanxi 710032,China;Shaanxi Province Aerospace and Astronautics Propulsion Research Institute Co.,Ltd.,Xi’an Shaanxi 710003,China;School of Mechanical and Precision Instrument Engineering,Xi’an University of Technology,Xi’an Shaanxi 710048,China;Department of Mechanical Engineering,Xi’an Jiaotong University City College,Xi’an Shaanxi 710018,China)

机构地区：[1]西安交通大学城市学院电气与信息工程系,陕西西安710018 [2]中检西部检测有限公司,陕西西安710032 [3]陕西空天动力研究院有限公司,陕西西安710003 [4]西安理工大学机械与精密仪器工程学院,陕西西安710048 [5]西安交通大学城市学院机械工程系,陕西西安710018

出　　处：《润滑与密封》2022年第4期110-115,共6页Lubrication Engineering

基　　金：科技部创新方法工作专项(2019MO10200);西安交通大学城市学院校级项目(2020Y12)。

摘　　要：旋转工作台是数控机床的重要组成部分,其运行精度直接影响被加工件的形面误差和表面粗糙度。从精密数控铣磨床旋转工作台支撑轴承的设计出发,选用静压轴承支撑形式并对轴承进行设计及试验分析。设计的径向轴承和推力轴承分别为4油腔和8油腔带回油槽结构,节流方式选择小孔节流。计算轴承油膜刚度随半径间隙和节流孔径的变化,根据计算结果确定半径间隙和节流孔径的大小。在模拟测试装置上对设计轴承的回转精度进行测试,测试指标为径向跳动和轴向窜动,测试结果表明径向跳动最大0.15μm、轴向窜动最大0.1μm,设计的轴承满足精密转台的使用要求。Rotating table is an important part of CNC machine tools, and its operation accuracy directly affects the shape error and surface roughness of the workpiece.Starting from the design of the support bearing of the rotary table of the precision CNC milling and grinding machine, the static pressure bearing support form was selected and the bearing was designed and tested.The radial bearing and thrust bearing were designed with 4 oil chambers and 8 oil chambers with oil return groove structure respectively, and small hole throttle was selected for the throttling method.The changes of bearing oil film stiffness with radius clearance and throttle aperture were calculated, and the sizes of radius clearance and throttle aperture were determined according to the calculation results.The rotation accuracy of the designed bearing was tested on a simulation test device.The test indicators were radial runout and axial channeling.The test results show that the maximum radial runout is 0.15 μm and the axial channeling is 0.1 μm.The designed bearing meets requirements for the use of precision turntables.

关 键 词：精密机床 旋转工作台 静压轴承 回转精度 

分 类 号：TH122[机械工程—机械设计及理论]