抄録
One of the problems in ceramic grinding is damage to tool after a long time operation. It gives a crucial damage to work piece so that the grinding tool has to be replaced by new tool before the crucial damage. Acoustic emission is often used in the monitoring. It gives satisfactory results in certain case, while some results are ineffective because the acoustic emission is sensitive to noise. In the present study, we use the vibration acceleration of the ceramic work piece during the grinding process. The acceleration can be easily acquired and show stable characteristics irrespective of measurement location. We investigate a feasibility of damage monitoring of ceramic grinding tool using the vibration acceleration, and focus on the amplitude modulation of the obtained acceleration. A direct frequency analysis to the obtained acceleration is ineffective for the monitoring because it only shows broadband random frequency components. On one hand, the frequency analysis of the amplitude modulation shows significant results. The rotational frequency of the tool and its multiples are clearly observed in the frequency components of the amplitude modulation, and the tool condition can be monitored by tracking the transition of the rotational and its multiples frequency components.
