摘要
为解决高速主轴-刀柄接口因离心膨胀导致极限转速偏低及定位精度下降的问题,设计了一种新型离心膨胀动态补偿系统,并对其性能进行了分析。利用ANSYS有限元软件分析了主轴-刀柄接口的锥面接触应力,确定了主轴-刀柄接口的极限转速,计算了主轴-刀柄接口的径向刚度。通过与常规主轴-刀柄接口进行对比,验证了补偿系统的补偿效果。带补偿系统的主轴-刀柄接口锥面接触应力满足径向定位要求,接口极限转速提高43.8%,接口径向刚度随转速与载荷的变化关系更符合高速加工实际要求。
In order to solve the problem of lower speed limit and reduced positional accuracy by centrifugal expansion of high speed spindle -toolholder, a new type of centrifugal expansion dynamic compensation system is designed, and its performances is analyzed. The cone contact stress and radial stiffness of spindle - toolholder is analyzed by means of ANSYS FEM software, and the limit rotate speed is determined accordingly. By the contrast analysis of conventional and compensated spindle - toolholder interface, the compensational function is verified. Cone contact stress assures the radial locating of the compensated spindle -toolholder interface, and the limit rotate speed is raised by 43. 8%. The relationship of radial stiffness of spindle - toolholder interface with rotating speed and load fits better for high speed machining.
出处
《制造技术与机床》
北大核心
2015年第10期84-89,共6页
Manufacturing Technology & Machine Tool
基金
国家科技重大专项(2013ZX04001041)
关键词
高速主轴
主轴-刀柄接口
补偿系统
极限转速
径向刚度
high- speed spindle
spindle -toolholder interface
compensation system
limit rotate speed
radial stiffness
