MONITORING OF MACHINING PROCESSES AND ERROR MOTIONS FOR A HIGH-SPEED AIR TURBINE MICROSPINDLE

Kosuke Uchiyama, Hiroshi Murakami, Akio Katsuki, Takao Sajima, Zhu Guangyu
Abstract:
We develop a high-speed air turbine microspindle with a built-in microphone and pressure sensor to detect the breakage and wear of a micro-tool and to detect anomalies in the bearing and other spindle components. The results show that the spindle can detect variations in the microtorque (0.1 N·cm) and the frequency components of the rotation of the balls of the ball bearing. In addition, the effect of the external torque variation on the radial error motions of an air turbine microspindle is investigated. The results show that it is possible to measure the microtorque by measuring the change in the rotational speed of the spindle and that the radial error motions in the X and Y directions increase as the torque increases. In the case of the radial error motion in the X direction, the radial error motion is increased to approximately 0.007 µm per torque variation of 0.001 N·cm.
Keywords:
high-speed microspindle, monitoring, micro-drill, pressure sensor, microphone
Download:
IMEKO-WC-2015-TC14-318.pdf
DOI:
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Event details
Event name:
XXI IMEKO World Congress
Title:

Measurement in Research and Industry

Place:
Prague, CZECH REPUBLIC
Time:
30 August 2015 - 04 September 2015
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