Apparatus and method for monitoring machining conditions of a machine tool

摘要

Apparatus and a method for monitoring the machining conditions of a machine tool by the continual sequential measurement of a plurality of physical magnitudes characterising the machining process, and the combination of abnormal values which are detected being evaluated to indicate a condition identifying a tool breakage or process irregularities. For this purpose the ultrasonic emission from the machining process, the main and the feed drive powers are measured and sequentially evaluated with respect to its deviation from a predetermined nominal range for its distribution. If the nominal range of the measured value distribution is exceeded a signal is emitted and stored. The simultaneous occurrence of signals from all three measured values is emitted as a tool breakage signal and the simultaneous occurrence of two signals leads to the emission of an alarm signal relating to process irregularities.