Tool Condition Monitoring in Grinding Operation Using Piezoelectric Impedance and Wavelet Transform

Abstract

The purpose of the present study is to monitor tool condition in a grinding operation through the electromechanical impedance (EMI) using wavelet analysis. To achieve this, a dressing experiment was conducted on an industrial aluminum oxide grinding wheel by fixing a stationary single-point diamond tool. The proposed approach was verified experimentally at various dressing tool conditions. The signals obtained from an EMI data acquisition system, composed of a piezoelectric diaphragm transducer attached to the tool holder, were processed using discrete wavelet transform. The approximation and detail coefficients obtained from wavelet decomposition were used to estimate tool condition using the correlation coefficient deviation metric (CCDM). The results show excellent performance in tool condition monitoring by the proposed technique, which effectively contributes to modern machine tool automation.

Investigation of electromechanical impedance and residual stress relation for samples machined by hot ultrasonic-assisted turning

“…As a result, they found that the EMI method gave successful results in determining the surface condition. Junior et al 15 conducted preliminary studies to estimate tool wear by EMI method after grinding. They have identified three levels for wear.…”