A device for predicting a blade breakage of a bandsaw blade of a bandsaw. The device comprises an eddy-current sensor configured to generate a sensor signal that is dependent on a technical parameter of the bandsaw blade. The device further comprises an evaluation unit configured to evaluate the sensor signal, to compare the sensor signal with a predetermined tolerance range, and to generate a warning signal that indicates an imminent blade breakage of the bandsaw blade if the sensor signal lies outside of the predetermined tolerance range.

A method for operating a hand-guided machine tool. The method contains detecting at least one linear acceleration value by means of the at least one sensor apparatus (6); subtracting the gravitational acceleration from the at least one linear acceleration value to form an adjusted linear acceleration value; integrating the adjusted linear acceleration value into a speed value; integrating the speed value into a distance value; multiplying the speed value by a time constant to form at least one further distance value; adding the distance value to the further distance value to form at least one total distance value; filtering at least one of the linear acceleration values and/or at least one of the speed values; comparing the total distance value with a defined limit value; and initiating a predefined action when the total distance value exceeds the defined limit value. A hand-held machine tool for carrying out such a method is also described.

Disclosed are an automatic attachment changer and a boring machine having the same. The automatic attachment changer includes a stacker in which a plurality of attachments is stacked in a height direction by a unit of housing cell having a length larger than the attachments such that the attachment is individually arranged in each housing cell horizontally with respect to a bottom of the stacker, a stacker carrier having a carrier body secured to the stacker, a body transfer transferring the carrier body and a carrier power driving the body transfer, and an attachment changer controlling the stacker and the stacker carrier such that a select attachment is selected among the attachments and the select attachment is combined to a spindle assembly. The attachment is changed in the boring machine with high reliability and correctness.

A protection member for an optical measurement device, such as a break-beam tool setting device for a machine tool. The protection member includes a conduit through which light and air can pass. The conduit is configured such that, in use, a beam of light is passed through the conduit along an optical axis and a stream of air is guided out of the conduit along an airflow axis. The optical axis is non-parallel to the airflow axis and the conduit has a varying cross-sectional profile along the airflow axis. Improved measurement repeatability is provided.

A method of monitoring a tool clamping device mounted on a machine spindle, the clamping force of which tool clamping device is generated by a spring assembly which exerts a force in the direction of the clamping position on an actuating element actuating the clamping or the release of a tool or tool holder. In the method, the spring force and the displacement of the actuating element are continuously measured during the release and/or clamping of a tool or tool holder and recorded as functions of the time. These recorded functions are used to identify at least one parameter characteristic for the status of the tool clamping device. Based on the spring force and the displacement over time, a spring characteristic curve is plotted in the form of the spring force as a function of displacement, the analysis of which spring characteristic curve provides information about a number of characteristic parameters.

The invention relates to a method for determining the degree of wear of at least one component of a machining device (10), wherein at least one actual condition (19) of the machining device (10) is established and the at least one actual condition (19) is compared to at least one comparative condition (18) of the machining device (10), and a conclusion is drawn as to the degree of wear of the at least one component as a function of a deviation determined between the at least one actual condition (19) and the at least one comparative condition (18), wherein, to establish the at least one actual condition (19) and/or the at least one comparative condition (18), sound emissions (16) of the machining device (10) are captured. The invention also relates to a device (13) for determining a degree of wear of at least one component of a machining device (10), a machining device (10) for machining workpieces (11), and a computer program for determining a degree of wear of at least one component of a machining device (10).

Systems and methods for intelligent tool detection are described. One embodiment includes a remote server, a processing system communicatively coupled to the remote server, and a tool tray communicatively coupled to the processing system. The tool tray is configured to store a plurality of tools. The processing system is configured to detect whether a tool has been removed from the tool tray, and to communicate information associated with the removal of the tool to the remote server.

A switch housing body has a base and a sidewall having an axis and extending from the base to a rim and having a pair of axial slots. A switch cap has: a cap body having a top web; and a sidewall extending from the top web to a rim and having a pair of holes. A shaft passes through the pair of axial slots and pair of holes. A spring biases the cap axially away from the housing from a compressed condition to an extended condition. A cap electrical contact and a housing electrical contact have an electrically closed condition at the compressed condition.

The present disclosure provides an ultrasonic drive and driving method configured for driving an ultrasonic tool. The ultrasonic drive includes a switch module, a sensing element and a control element. The sensing element senses the voltage and current of the ultrasonic tool and generates a sensing signal accordingly. The control element receives the sensing signal and outputs a control signal. The switch module outputs an ultrasonic signal according to the control signal for controlling the vibration of the ultrasonic tool. When the ultrasonic drive operates a frequency sweep function, the control element determines an operating interval and an operating frequency of the ultrasonic signal. When the ultrasonic drive operates a frequency following function, the control element adjusts the operating frequency according to the sensing signal for keeping the impedance of the ultrasonic tool consistent.

An embodiment of the present invention provides a machining system that can lengthen the lifespan of a tool and improve the machining quality of a workpiece by managing the amount of wear of the tool by machining the workpiece using the other portion of the tool when a portion of the tool is worn and the machining performance of the tool is decreased. The machining device for controlling a tool position considering tool wear according to an embodiment of the present invention includes: a tool-moving unit coupled to the machining unit and moving the machining unit to change the position of the tool with respect to the workpiece; a supporting unit supporting the workpiece and moving the workpiece to change the position of the workpiece with respect to the tool; a sensor unit disposed at the machining unit and measuring a current amount, which is supplied to a machining motor operating the tool, or an operation force of the tool; and a control unit receiving a measurement signal from the sensor unit and transmitting a control signal to the tool-moving unit and the supporting unit.