A Finite Element Analysis of Air Bearings Applied in Compact Air Bearing Spindles
A Finite Element Analysis of Air Bearings Applied in Compact Air Bearing Spindles
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DOI：
10.1016/j.procir.2017.03.337
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
C. Müller;S. Greco;B. Kirsch;J. Aurich
中科院分区：
文献类型：
--
作者：
C. Müller;S. Greco;B. Kirsch;J. Aurich
对于微细加工，需要高速空气静压主轴以在高旋转精度下实现所需的切削速度。本文介绍了一种用于微型加工应用的紧凑型高速主轴的空气静压轴承的研究。采用摄动法和有限元法，考虑转子的平移和倾斜运动，确定空气轴承的静态和动态特性。然后利用这些特性建立整个主轴的转子动力学模型，并给出临界转速。在模型的帮助下，主轴的设计可以达到高达466，000rpm的高旋转精度。
For micro machining high-speed aerostatic spindles are needed to achieve the required cutting speeds at high rotational accuracy. In this paper, a study of aerostatic bearings for the use in compact high-speed spindles for micro machining applications is introduced. The perturbation and the finite element method are used to determine the static and dynamic characteristics of the air bearings considering the translation and tilt motion of the rotor. These characteristics are then used to build a rotordynamic model of the entire spindle, provinding critical rotational speeds. With the help of the model a spindle was designed which could reach speeds up to 466,000rpmat a high rotational accuracy.