影响磁悬浮电主轴单元回转精度因素的分析  

Analysis of Impact Factors on the Rotary Accuracy of Motorized Spindle Unit with AMB

作　　者：钱永明[1] 吴强[1] 马苏扬[1] 俞冀[1] 廖萍[1] 

机构地区：[1]南通大学机械工程学院,江苏南通226019

出　　处：《机床与液压》2015年第13期24-27,105,共5页Machine Tool & Hydraulics

基　　金：国家自然科学基金项目(60974049);江苏高校优势学科建设工程资助项目;江苏省研究生科研创新基金项目(CXZZ13_0866);南通大学研究生科研创新基金项目(YKC13018)

摘　　要：介绍了磁悬浮电主轴单元的工作原理,对影响其回转精度的因素进行了分析。以拟用于额定功率为2.2 k W且转速可达24 000 r/min的雕铣机中的主轴为例,分析了控制器反应时间不超过10 ms和主轴端部切削力不超过100 N时的主轴悬浮间隙精度、载荷变动量以及控制系统反馈精度对主轴回转精度的影响。结果表明:当前、后径向磁轴承处主轴圆度误差分别不超过0<Δ1<0.002 mm和-0.006mm<Δ2<0.006 mm、主轴端部载荷变动量不超过1 N,主轴回转精度满足加工要求,对提高磁悬浮电主轴单元的工作性能具有重要意义。The working principle of motorized spindle unit with AMB was introduced and the impact factors of its rotary accuracy was analyzed. Taking the spindle of engraving and milling machine with the 2. 2 kW power rating and 24 000 r/min as an example, the influence of the spindle＇s suspension accuracy, load＇s variation and the control system＇s feedback accuracy on the spindle＇s rotary accu- racy was analyzed when the controller＇s reaction time and the spindle nose＇s cutting force were less than 10 ms and 100 N respectively. The results show that when the spindle＇s roundness error of front and back radial magnetic bearing are between 0 mm to 0. 002 ram and between -0. 006 mm to 0. 006 mm respectively, the load＇s variation of the spindle nose is less than 1 N, the spindle＇s rotary accuracy meet the requirement. It is significance to improve the working performance of the motorized spindle unit with AMB.

关 键 词：主轴 回转精度 磁悬浮 因素 

分 类 号：TH122[机械工程—机械设计及理论]