A DC motor based cutting tool condition monitoring system

摘要

In this paper a cutting tool condition monitoring system for CNC lathes is presented. The system is based on the measurement of the main DC motor current of the lathes. It consists of current and rotation speed sensors, a cutting tool - part touch sensor, analogue memory, amplifiers, filters and a personal computer. The system is capable of functioning in three modes depending on the machined surface. It can take into account the part diameter variation and the acceleration of the spindle. Thesystem is trained by a genetic algorithm based fuzzy rule set. The monitoring system can be used in an unmanned manufacturing environment.