A capacitive sensor for in-process evaluation of grinding wheel cutting ability during metal matrix composites machining is proposed. The capacitive system is based on a sensor formed by a conducting surface that is a capacitor plate with an insulating medium, while the second plate is the grinding wheel. The sensor has been characterised by static tests, measuring the capacity at the grinding wheel surface conditions. Dynamic tests have been carried out on a horizontal spindle surface grinder equipped with a two-components piezoelectric dynamometer, clamped on the grinding table. The capacitive sensor has been interfaced with a data acquisition system and placed on the head of the machine tool. Assessment of grinding wheel wear has been obtained by measuring on-line cutting force components and flat area percentage on tool surface.
A Monitoring System for Metal Matrix Composites Grinding Based on a no Contact Capacitive Sensor
PAOLETTI, ALFONSO;DI ILIO, Antoniomaria
2012-01-01
Abstract
A capacitive sensor for in-process evaluation of grinding wheel cutting ability during metal matrix composites machining is proposed. The capacitive system is based on a sensor formed by a conducting surface that is a capacitor plate with an insulating medium, while the second plate is the grinding wheel. The sensor has been characterised by static tests, measuring the capacity at the grinding wheel surface conditions. Dynamic tests have been carried out on a horizontal spindle surface grinder equipped with a two-components piezoelectric dynamometer, clamped on the grinding table. The capacitive sensor has been interfaced with a data acquisition system and placed on the head of the machine tool. Assessment of grinding wheel wear has been obtained by measuring on-line cutting force components and flat area percentage on tool surface.Pubblicazioni consigliate
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