A system for chip-removing machining of a workpiece and for measuring and evaluating force and torque during the chip-removing machining of the workpiece includes a machine tool with a tool for chip-removing machining of the workpiece; a device for measuring force and torque during chip-removing machining of the workpiece; and an evaluation unit for evaluating measured value data of the device. The measuring device includes a measuring unit installed in the machine tool and rotates with the tool about an axis of rotation during chip-removing machining. The evaluation unit is stationary. The measuring unit generates measured values of force and torque. The measuring device includes a control unit that transmits measured values as measured value data in a wireless manner directly to the evaluation unit with a transmission power in the range of 0.1 mW to 10 mW.

The objective of the present invention is to provide a machine tool control device with which chips can be reliably divided and discharged, and with which damage to a tool can be suppressed by reducing shock when the tool cuts into a workpiece. A machine tool control device 100 which controls a main axis that causes a tool T to rotate relative to a workpiece W, and which executes a cutting process by controlling a feed axis to move the tool T and the workpiece W while causing the same to oscillate relative to one another in a feed direction, is provided with an oscillation command generating unit 16 which generates an oscillation command on the basis of a predetermined oscillation condition, and a position and speed control unit 15 which controls a motor 30 that drives the feed axis, on the basis of a superimposed command generated by superimposing the oscillation command generated by the oscillation command generating unit 16 onto a position command or a position deviation, wherein the oscillation command generating unit 16 changes at least one of an oscillation command phase progression method and an oscillation command amplitude, on the basis of either an oscillation phase calculated on the basis of the predetermined oscillation condition, or time.

A variable-frequency ultrasonic machining system for a computer numerical control milling machine including a cutting force detection unit, a temperature sensing unit and a processor. The processor receives sensing signals of the cutting force detection unit and the temperature sensing unit, processes the received sensing signals according to a set program, and sends control signals to an ultrasonic drive power supply and a corresponding servo motor, respectively. By adjusting the ultrasonic vibration frequency or the frequency of the frequency converter of the CNC milling machine in the machining process, the system ensures the continuity of ultrasonic-assisted milling of a part with a complex curved surface in case of uneven cutting allowance, and improves efficiency of ultrasonic machining.

A cutting machine includes a tool holder for holding the tools required for chip-removing machining of a workpiece, and a tool arm connecting the tool holder to a drive unit, which moves the tool arm to align one of the required tools with a workpiece in each manufacturing step. The tool arm includes an upper arm connected with the drive unit and mechanically connected to a lower arm. The lower arm is connected with the tool holder. At least one force transducer is positioned between the upper arm and the lower arm so that during chip-removing machining of a workpiece, the force transducer is capable of measuring a tool force exerted by any of the required tools in a main flow of forces.

A machine tool includes: an advancing/retracting drive device causing a main spindle to travel back and forth with respect to a milling shaft; a clamp device provided in the milling shaft and clamping the main spindle; a feeding control section controlling the advancing/retracting drive device and the clamp device; and a reaction force sensor detecting reaction force against the advancing/retracting drive device from the main spindle. The feeding control section performs: in an unclamped state where the main spindle is not clamped by the clamp device, advancing/retracting control by which the main spindle is moved to a designated feeding position by the advancing/retracting drive device; and in a clamped state where the main spindle is clamped by the clamp device, reaction force servo control by which the advancing/retracting drive device is operated in a direction in which the reaction force detected by the reaction force sensor becomes small.

An apparatus for active contact force control is disclosed. The apparatus can have upper flange on which to mount a production tool. The apparatus can be mounted, via a lower flange, on a multi-axis machine to obtain spatial motion together with the corresponding production tool. The apparatus can comprise a housing inside which can be a linear actuator connected to guides. Mechanical connection between a ball screw and the upper flange can contain a force sensor and at least one spherical joint. The connection between the spherical joint and the upper flange can be formed using a mechanical dissipative element made of elastic dissipative elements and a disc plate positioned between the elastic dissipative elements.

A cutting machine configured for the chip-removing machining of a workpiece includes a plurality of required tools. Each tool can exert a tool force onto the workpiece. The cutting machine includes a tool holder for simultaneously holding all of the tools required for operating on the workpiece. A tool slide moves the tool holder to successively align one of the tools to operate on the workpiece, and the tool and the workpiece are movable for chip-removing machining in each manufacturing step. The tool holder includes at least two single-component force transducers. Each single-component force transducer measures a tool force exerted by one of the tools during the chip-removing machining of the workpiece in a force main connection.

A cutting tool includes a shaft portion. The shaft portion includes an increased-diameter portion having a diameter larger than a diameter of other portion of the shaft portion. The increased-diameter portion has a recessed portion formed in a peripheral surface of the increased-diameter portion.

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.

The disclosure provides a method to estimate tool life on a cutting machine. A sensor is installed on the cutting machine to measure the cutting thrust of a cutting tool during operation. Specifically, the information gathered from the sensor enables the cutting tool to cut a workpiece at different settings of cutting rate, with a maximum cutting thrust of the cutting tool measured during each cut, and defined as a characteristic signal. Through the characteristic signals obtained from the multiple cuts, factorization processing and inverse processing are initiated to obtain plural values in a complex remaining life index for the cutting tool. Using the cutting rate as the horizontal axis and the remaining life as the vertical axis, the complex remaining life and corresponding cutting rates are plotted on the vertical axis and the horizontal axis to form a line graph illustrating the complex remaining life index.