The invention relates to a method for monitoring a machining tool that is used for machining primarily metal materials, comprising a cutting tool, wherein the cutting force, feed force, and passive force can be adjusted during machining, and comprising sensors to measure forces. In order that machining can be stopped 2 to 60 seconds, preferably 2 to 10 seconds, prior to failure of the cutting body, the invention proposes that the sensors continuously sense at least one of said forces during machining and machining is stopped if a sudden reduction in the sensed force occurs.

A processing system includes a cutting tool for milling, a plurality of sensors, and a processing unit. The plurality of sensors each is configured to measure a physical quantity that indicates a state related to loads on the cutting tool during cutting. The processing unit is configured to generate, based on measurement results from the respective sensors at a plurality of measurement time points, measurement data that is related to the loads in two directions on a plane perpendicular to a rotation axis of the cutting tool and that includes two-dimensional data at each of the measurement time points, and to perform a determination process concerning cutting in which the cutting tool is used, based on a two-dimensional shape indicated by the generated measurement data.

A processing system includes a cutting tool for milling, a plurality of sensors, and a processing unit. The plurality of sensors each is configured to measure a physical quantity that indicates a state related to loads on the cutting tool during cutting. The processing unit is configured to generate, based on measurement results from the respective sensors at a plurality of measurement time points, measurement data that is related to the loads in two directions on a plane perpendicular to a rotation axis of the cutting tool and that includes two-dimensional data at each of the measurement time points, and to perform a determination process concerning cutting in which the cutting tool is used, based on a two-dimensional shape indicated by the generated measurement data.

A maintenance indicator stores an information bit string. The information bit string encodes at least a section of a piece of maintenance information of a component of a cutting tool in binary. The information bit string has a plurality of information bits. Each information bit has an information bit state. In an activated display state, the maintenance indicator emits flashes that follow the information bit states of the information bit string and thus displays an information signal. In the activated display state, the maintenance indicator displays an announcement signal. The announcement signal announces the information signal. The information signal can be filmed by a photosensitive element while maintaining an air gap.

An anomaly detection system includes: a sensor provided to a tool, the sensor being configured to measure a physical quantity, of the tool, that varies while a machine tool is machining a machining target object by means of the tool; and an anomaly detection device configured to detect an anomaly in the tool, based on measurement data obtained by the sensor. The anomaly detection device includes: a synchronization unit configured to achieve synchronization between target data being measurement data in time series obtained by the sensor, and reference data being a measurement result in time series of the physical quantity when the tool is in a normal state; a distance calculation unit configured to calculate a distance between the reference data and the target data; and an anomaly detection unit configured to detect an anomaly in the tool by comparing the distance with a threshold.