Study on in-process sensing of tool failure utilizing transient vibration generated by a diagnostic impulse

本研究的主要目的是建立一种新的在线检测/监测刀具磨损的方法，特别是在车削过程中。通过各种实验，得到了以下结果.对于普通碳钢（S35 C）/通用铸铁（FC20），诊断脉冲产生的瞬态振动与刀具后刀面磨损密切相关.对于这种过程中感测方法，切削刀具必须被牢固地夹紧。一般情况下，夹紧螺钉的固定扭矩必须大于15 Nm.为了提高诊断脉冲幅度的可控性和准确性，介绍了一种新设计的小型电磁锤，并进行了试验。在选定的条件下，脉冲的总变化仅限于百分之几。

The major aim of the present research project is to contribute for establishing a new method of in-process sensing/monitoring tool wear especially in turning process. After various experiments are carried out, following results are obtained.1. The close correlations between flank wear of cutting tool and the transient vibration generated by a diagnostic impulse are confirmed for plain carbon steel (S35C) /general purpose cast iron (FC20).2. For this in-process sensing method, the cutting tool is necessarily clamped firm. The fixing torque of the clamp screw must be over than 15Nm for ordinary case.3. Improving controllability and accuracy of the amplitude of the diagnostic impulse, a newly designed small electro-magnetic hammer is introduced and tested. The resultant variation of the impulse are limited only several % for the selected conditions.