Design and evaluation of a high-speed and precision microspindle
Design and evaluation of a high-speed and precision microspindle
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DOI：
10.1007/s00170-014-6690-x
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发表时间：
2015-05
期刊：
影响因子：
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通讯作者：
Wei Li;Zhixiong Zhou;H. Xiao;Bi Zhang
中科院分区：
文献类型：
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作者：
Wei Li;Zhixiong Zhou;H. Xiao;Bi Zhang
本研究提出一种高速精密微主轴之设计与评估。为实现高速性能，设计了一种双排喷嘴径向冲击式涡轮机。采用整体式柔性联轴器将涡轮机轴与刀具解耦，并采用空气静压轴承直接支承刀柄，以减小刀具在高速下的跳动。此外，形状记忆合金（SMA）为基础的夹具设计的工具夹紧。它可以避免叠加公差引起的装配误差。微主轴具有简单的配置和紧凑的设计与30毫米的外径和95毫米的长度。样机的最高转速超过240，000 rpm，刀具径向跳动为2.79 μm。评估结果显示本研究所提出之微主轴新设计概念之可行性与潜在应用。
This study presents the design and evaluation of a high-speed and precision microspindle used for micromechanical machining. A radial impulse turbine with two rows of nozzles was designed to realize the high-speed performance. A monolithic flexible coupling was used to decouple the turbine shaft and the tool, and then, the tool shank was directly supported by aerostatic bearings, which can minimize the run-out of the tool at high speeds. Additionally, a shape memory alloy (SMA)-based clamp was designed for tool clamping. It can avoid the assembly error caused by stack-up tolerances. The microspindle has simple configuration and compact design with a 30-mm outer diameter and a 95-mm length. The prototype microspindle has a maximum speed of over 240,000 rpm and a tool radial run-out of 2.79 μm. The evaluation results show the feasibility and potential application of the new design concept of the microspindle proposed in this study.