Tool machines monitoring arrangement as well as the arrangement and method for detecting of the tool breakage events

摘要

A system and method for monitoring vibrations of a cutting tool produced by tool break events, and for interpreting them to detect tool breaks of sufficient magnitude to endanger the machined part. The signal generated by a sensor such as an accelerometer is preprocessed to attenuate low frequency machining noise and detect the energy in a higher frequency band, then sampled, and the digitized signal samples analyzed by tool break detection logic. This logic is triggered by a positive- going signal transient, and prevents false alarms on minor tool break events that do not mar the workpiece and on noise from other sources.