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

本研究项目的主要目的是建立一种新的过程中刀具磨损监测方法，特别是在车削过程中。在进行了各种实验后，得到了以下结果：证实了普通碳钢(S35C) /通用铸铁（FC20）的刀具刃口磨损与诊断脉冲产生的瞬态振动之间的密切关系。对于这种过程传感方法，刀具必须夹紧。一般情况下，夹紧螺丝的固定力矩必须大于15Nm。为了提高诊断脉冲振幅的可控性和准确性，介绍了一种新设计的小型电磁锤，并对其进行了测试。在所选择的条件下，脉冲的最终变化仅被限制在几个百分点。

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.