A sensor module for a tool holder for a cutting tool, such that when the sensor module is arranged to the tool holder having a cutting tool connected thereto, an axial portion of the cutting tool is positionable in a predefined rest position with respect to the sensor module. The sensor module includes at least one position sensor, wherein, when the sensor module is arranged to the tool holder having a cutting tool connected thereto, the position sensor is located radially spaced from the axial portion of the cutting tool for measuring deflection of the cutting tool with respect to the rest position. The disclosure further relates to a tool holder, a cutting tool, a cutting assembly, and a method for measuring deflection of a cutting tool.

A cutting machining apparatus 1 includes: a head 5 including a spindle drive 51 that rotary drives a rotary spindle with a tool 20 secured to a tip of the rotary spindle; a proximity sensor 34; a signal acquirer obtaining a signal waveform of a detection signal that is output from the proximity sensor 34 when the rotary spindle 52 is rotated in a state in which the head 5 is moved so that the proximity sensor 34 faces a lateral side of the tool before and after cutting machining of the workpiece W using the tool; and a determiner determining whether or not the tool 20 is broken based on whether or not there is a difference in signal waveforms obtained before and after the cutting machining.

A device for measuring and monitoring tools of a machine tool, wherein the machine tool comprises a spindle shaft for the tool, the shaft being arranged in a spindle housing, wherein a work piece with good electric conductivity can be machined using the tool, wherein the spindle shaft is electrically insulated from the spindle housing, includes a measuring and monitoring system. The measuring and monitoring system measures at least one electric measurement, which depends on the contacting state between the tool and the work piece. A rotary transmitter contacts the rotating spindle shaft to measure the measurement detectable between the tool and the work piece, wherein the rotary transmitter is connected with the spindle housing in an electrically insulated manner.

The state measuring device includes a measurement section attached to the blade portion or to a vicinity of the blade portion to measure a state of the blade portion, an AD converter attached to the cutting tool to acquire a measurement value measured by the measurement section at a predetermined sampling rate and perform AD conversion on the measurement value, a transmission section which transmits, on each acquisition of the measurement value from the AD converter, the acquired measurement value using digital wireless communication, and a monitor device provided outside the cutting tool. The monitor device includes a reception section which receives the measurement value transmitted by the transmission section, and a data management section which causes a display section to display the measurement value and causes a storage section to store the measurement value on each reception of the measurement value by the reception section.

Provided is a rotary machine tool with which it is possible to measure, in real time, the damage or extreme wear thereof. The rotary machine tool of the present invention is provided with at least: a sensor installation hole which has the rear end being open to the exterior at the rear end of the main body of the rotary cutting tool, and the tip being above the tip of the main body of the rotary machine tool and closed off from the exterior; a sensor that is positioned at the tip of the sensor installation hole and detects the state at the positioned position; and a sensor insertion hole that is connected to one end of the sensor and is coupled with the rear end of the rotary cutting tool.

A method of operating a machine tool apparatus, including: causing a tool mounted on the machine tool apparatus to work on a workpiece, during the working of the workpiece by the tool, at least one sensor monitoring the tool, machine tool apparatus and/or workpiece, for one or more signals indicative of the condition of the tool; and using the output of the one or more sensors to automatically configure when and/or how the tool and/or workpiece is inspected by at least one inspection device, the output of which is used to determine whether or not to keep using the tool.

The present invention concerns a method and a system for detecting malfunctions in an apparatus and/or defects in a workpiece processed by said apparatus. The method provides for acquiring a sound signal emitted by an apparatus during an operation cycle of the same, then comparing the sound signal with a plurality of audio tracks stored in a memory area for determining a malfunction of the apparatus and/or a defectiveness of the workpiece processed by the apparatus based on the result of said comparison. The operation cycle is subdivided into a plurality of work phases and during the acquisition of the sound signal a work phase of said plurality of work phases is identified. Each audio track of the plurality of stored audio tracks comprises an audio component relating to acquired sound signals, and additional information data comprising at least one identifier of the work phase executed by the apparatus during the acquisition of the sound signals of the audio component. The plurality of audio tracks used for the comparison with the sound signal is a group of audio tracks of the plurality of audio tracks whose identifier of the work phase of the apparatus corresponds to the identified work phase. The identification data of the audio tracks additionally comprise at least one identifier of a plurality of components activated during the phase to which the audio component refers, and it is further provided for a) identifying a plurality of components activated during the identified work phase, b) on the basis of the plurality of activated components, identifying a set of comparison phases among the plurality of phases of the operation cycle, and c) identifying as defective at least one component between the plurality of components activated during the work phase and/or the workpiece, on the basis of the audio tracks relating to the set of comparison phases identified and/or on the basis of sound signals acquired during the identified comparison phases.

An information measuring device includes a sensor that obtains information on a phenomenon periodically occurring on an apparatus while being synchronized with the steady repetition of an operation and a control device. The control device associates the obtained information with an operation phase in the operation so as to generate change in the phenomenon in one cycle based on the information obtained during the operation of several times. Meanwhile, an operation cycle where the operation is repeated in the apparatus, a sampling cycle, and a duration where the operation is steadily repeated in the apparatus are included in measurement parameters. The control device calculates an optimum measurement parameter from a relation between the measurement parameters on at least one of the measurement parameters and changes the measurement parameter as a target to the optimum measurement parameter.

The invention relates to a method for determining a position of a work piece and of a tool in a machine tool, in which a work piece is clamped at the machine tool, in which the tool is subsequently inserted into a rotatable spindle shaft by means of a tool holder and the spindle shaft is set into rotation, in which an electrical voltage is applied between the work piece and the tool, in which the tool and the work piece are displaced with respect to one another, and in which a variation in the applied voltage is determined in the event of a contact between the tool and the work piece, and the respective position of the work piece and/or of the tool is determined and recorded in a computing program for control/regulation of the machining of the work piece.

A main spindle load monitoring device indicates a main spindle load in a machine tool that includes a tool with a plurality of edges on a main spindle and performs a process of a workpiece while the tool rotates with the main spindle. The main spindle load monitoring device includes a main spindle load detecting unit configured to detect a load on the main spindle, a main spindle load conversion unit, and a display control unit. The main spindle load conversion unit is configured to convert a time course of the main spindle load detected by the main spindle load detecting unit into a change of the main spindle load with respect to a main spindle rotation angle. The display control unit is configured to indicate a value of the main spindle load converted by the main spindle load conversion unit on a display screen in a polar coordinates system.