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首页> 外文会议>Sixth International Conference on Progress of Machining Technology: With Some Topics in Advanced Manufacturing Technology (ICPMT'2002); Sep 10-14, 2002; Xi'an, China >GAP SENSING FOR AIR BEARING
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GAP SENSING FOR AIR BEARING

机译：空气轴承的间隙感应

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摘要

This paper describes sensing ways of an air gap between spindle and bearing in a static pressure air spindle. The spindle used in the test have the gap of about 30 m m, and the gap changes with the change of cutting forces. In order to operate the machine tool with the air spindle safely, at least the minimum gap must be kept. The spindle in the air bearing, however, not only moves parallel or perpendicularly to the Z-axis but also tilt to the Z-axis. Therefore, if conventional positioning sensors are used for the measurement, number of sensors must be needed, and the sensors must have high frequency response because the spindle rotates very high speed. In this study, the electric capacitance between the spindle and the bearing case is used to measure the gap. Using the capacitance, the minimum gap can be estimated and the output signal has high frequency response and high stability, while position of the spindle can not be detected precisely.
机译：本文介绍了静压空气主轴中主轴与轴承之间的气隙的感应方式。试验中使用的主轴的间隙约为30 m m，该间隙随切削力的变化而变化。为了使带有空气主轴的机床安全运行，必须至少保持最小间隙。但是，空气轴承中的主轴不仅平行于或垂直于Z轴移动，而且还相对于Z轴倾斜。因此，如果使用传统的定位传感器进行测量，则必须要有多个传感器，并且由于主轴旋转速度非常高，所以这些传感器必须具有高频响应。在这项研究中，主轴和轴承箱之间的电容用于测量间隙。利用该电容，可以估计最小间隙，并且输出信号具有高频率响应和高稳定性，而主轴的位置无法精确检测。

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