A load sensing attachment for a machine tool assembly includes a machine tool interface, a load sensing device and a bit clamp interface. The machine tool interface couples the load sensing attachment to a drive train for a machine tool of the machine tool assembly. The load sensing device detects an axial load exerted on a housing of the machine tool when the load sensing attachment is coupled to the machine tool. The bit clamp interface couples the load sensing attachment to a bit clamp that selectively receives and secures a working bit. The bit clamp interface is coupled to the machine tool interface. A machine tool assembly for performing an operation on a workpiece includes the machine tool, the bit clamp and the load sensing attachment. A method for performing an operation on a workpiece using the machine tool assembly with the load sensing attachment is also disclosed.

A feed axis monitoring device includes a position deviation calculating unit, a machined surface perpendicular direction calculating unit, a position deviation component converting unit, a threshold value calculating unit, and an abnormality determining unit. The position deviation calculating unit calculates a position deviation of the feed axis. The machined surface perpendicular direction calculating unit calculates a direction perpendicular to a machined surface at a time of a position deviation calculation. The position deviation component converting unit converts a position deviation of the feed axis into a component in the perpendicular direction. The threshold value calculating unit calculates a threshold value based on a preset relation between an operating state of the main spindle and the threshold value. The abnormality determining unit determines that the feed axis has an abnormality when the position deviation exceeds the threshold value.

A real-time calibration-based tool condition monitoring system, device and method for repetitive machining operations to monitor tool conditions by a combination of a calibration procedure using a reference tool and similarity analysis comparing the reference tool with a working tool is disclosed.

A toolholder for use with a cutting element in a cutting process is provided. The toolholder includes at least one sensor arranged for detecting an environmental condition, and a control unit operatively connected to the at least one sensor. The control unit includes a crossbar array of resistive memory devices and a power source operatively connected to the crossbar array. The crossbar array includes a neural network stored thereon, the neural network being arranged to determine a condition of the cutting element or of the cutting process based on the environmental condition detected by the at least one sensor. A cutting tool and a cutting tool assembly is also provided.

A machine tool control device which reliably divides and discharges chips, and which suppresses damage to a tool by reducing shock when the tool cuts into a workpiece. The machine tool control device causes the tool to rotate and executes a cutting process to move the tool and the workpiece while causing the same to oscillate relative to one another in a feed direction, and is provided with an oscillation command generating unit which generates an oscillation command on the basis of a predetermined oscillation condition. A position and speed control unit controls a motor by superimposing the oscillation command generated by the oscillation command generating unit onto a position command or a position deviation. The oscillation command generating unit changes an oscillation command phase progression method and/or an oscillation command amplitude on the basis of an oscillation phase calculated from on a predetermined oscillation condition, or based on time.

A method of machining ceramic matrix composite components includes providing an ultrasonic vibration tool having a tool tip, and exciting the tool by providing a control current, such that the tool tip is repeatedly vibrated towards and away from a ceramic matrix composite workpiece. A slurry feed is supplied including abrasive particles to a surface to be machined by the tool tip. A vibration amplitude of the tool tip is controlled by sensing load on the tool and communicating with a computing device. The computing device controls the vibration amplitude of the tool tip. The computing device is provided with at least one memory programmed with historic data, and is operable to modify the vibration amplitude signal being sent to the tool, and comparing resulting load levels due to the change in vibration amplitude signals, and storing the change in vibration amplitude signals at the memory.

A downforce indicator device for indicating a downforce acting on an insertion tool includes a tool receptacle for receiving an insertion tool, a downforce measurement unit for measuring a downforce acting on the tool receptacle, and a downforce indicator unit for indicating the measured downforce. The downforce measuring unit includes a first and a second sleeve, coaxially and displaceably disposed on the first sleeve in the axial direction. The first sleeve is connected to the second sleeve by a limiting element which can be displaced axially on the first sleeve to establish a maximum position of the second sleeve for an axial displacement of the second sleeve directed away from the first sleeve. The first sleeve and the second sleeve form a common receptacle for receiving a spring element acting on the second sleeve in the direction towards the maximum position. The maximum position is associated with a minimum downforce.

[Problem] To easily discharge a workpiece remaining in a machining device or the like to an unloading platform when a use state of a tool has reached a predetermined value.

[Means to Solve Problem] A machine tool system 100 comprises: a processor 20 including a machining device 23 that machines a workpiece W with a tool T; a loading platform 10 on which the workpiece W to be processed in the processor 20 is placed; an unloading platform 30 on which the workpiece W processed in the processor 20 is placed; a loader device 40 that transports the workpiece W between the processor 20, the loading platform 10, and the unloading platform 30; and a controller 50 that controls the processor 20 and the loader device 30. When a use state of the tool T has reached a predetermined value, the controller 50 performs control so as to cause the loader device 40 to stop loading the workpiece W from the loading platform 10 to the processor 20, and cause the machining device 23 to perform machining on the workpiece W remaining in the processor 20 and then the loader device 40 to discharge the workpiece W to the unloading platform 30.

Feed rate scheduling methods include measuring a topography of a grinding wheel of a machine tool, calculating a topography parameter using the topography, and calculating a feed rate scheduling parameter for a toolpath of the grinding wheel based on the topography parameter. The topography may be measured using microscopy. The topography parameter may include a plurality of parameters including a density of crystals at a given depth (C(h)) of the grinding wheel and/or an area fraction of crystals protruding at a given depth ((h)) of the grinding wheel. The feed rate scheduling parameter may include a grinding wheel feed rate, a grinding wheel spin rate, and/or a grinding wheel cutting depth, among other parameters.