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A differential strategy for measurement of a static force in a single-point diamond cutting by a force-controlled fast tool servo
Measurement Science and Technology ( IF 2.4 ) Pub Date : 2020-05-04 , DOI: 10.1088/1361-6501/ab7d6f
Bo Wen , Yuki Shimizu , Hiraku Matsukuma , Keisuke Tohyama , Haruki Kurita , Yuan-Liu Chen , Wei Gao

This paper presents a new strategy for applying a piezoelectric (PZT) force sensor to the measurement of static force in a force sensor-integrated fast tool servo (FS-FTS) system for single-point diamond cutting on planar brittle material substrates. A conventional PZT force sensor unit composed of a PZT force sensor and a charge amplifier cannot be employed for measurement of static force due to the discharging characteristics of PZT materials. In this paper, to realize the long-term stable measurement of static cutting force, the time constant of the PZT force sensor unit is set to be infinitely large by removing the feedback resistor from the charge amplifier. The influence of bias current leakage, which arises as a result of removing the feedback resistor, is compensated through obtaining the differential output of the two PZT force sensor units having identical charge amplifiers and identical thermal characteristics. After microgroove-cutting experiments to verify the stabi...

中文翻译:

力控制快速工具伺服系统在单点金刚石切削中测量静态力的差分策略

本文提出了一种新的策略,将压电(PZT)力传感器应用于在力传感器集成的快速工具伺服(FS-FTS)系统中用于在平面脆性材料基底上进行单点金刚石切割的静态力的测量。由PZT力传感器和电荷放大器构成的常规PZT力传感器单元由于PZT材料的放电特性而不能用于测量静力。在本文中,为实现长期稳定的静态切削力测量,通过从电荷放大器中删除反馈电阻,将PZT力传感器单元的时间常数设置为无限大。偏置电流泄漏的影响是由于去除反馈电阻而引起的,通过获得两个具有相同电荷放大器和相同热特性的PZT力传感器单元的差分输出,可以补偿Δω。经过微槽切割实验以验证其稳定性。
更新日期:2020-05-04
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