超高速数控磨床磁浮电主轴的研究  

Research on Electrospindle Levitated with Magnetic Bearings in Super-High Speed CNC Grinder

作　　者：李波[1] 黄守道[1] 

机构地区：[1]湖南大学电气与信息工程学院,410082

出　　处：《精密制造与自动化》2006年第4期22-25,30,共5页Precise Manufacturing & Automation

基　　金：十五国家科技攻关计划重点项目(编号:2001BA1205B03)

摘　　要：介绍了磁浮轴承的优点和发展现状,并通过现场磨削试验来检验磁浮轴承电主轴的磨削性能。磁浮轴承控制器是以浮点DSP芯片TMS320C32为核心构建的数字控制系统。针对轴承套圈内圆磨削时主轴转子受力的特点确定了合适的控制器参数,使电主轴静态稳定悬浮并以60kr/min工作转速稳定运转,同步振幅小,轴承刚度高。现场磨削试验表明:磁悬浮电主轴的磨削精度基本满足要求,精磨效率接近工业应用水平。The paper presents advantages of magnetic bearings. The performance of electrospindle levitated with active magnetic bearing is verified by grinding test on the spot. Using the floating point DSP (TMS320C32) as microprocessor, a digital control system for the electrospindle is developed. The mechanical feature of grinding force acted on the rotor of spindle is considered when the spindle is used to grind the internal surface of rolling bearing inner ring, the control parameters are determined upon the above-mentioned analysis. The electrospindle is well levitated in a stable static state androtate at 60 000r/min with both small vibration amplitude and high stiffness. The results from grinding process with the spindle mounted on a precision grinding machine show that the accuracy of finished surface of workpiece can be up to the required machining quality, and the fine grinding efficiency is close to the industrial application level.

关 键 词：磁浮轴承 电主轴 超高速磨削 控制 磨床 

分 类 号：TG596[金属学及工艺—金属切削加工及机床]