A machining diagnosis device (100) includes a machining data acquirer (3) to acquire, from a machining tool (1), machining data including a result of machining performed based on a machining condition, a cutting section extractor (4) to extract, from the acquired machining data, a cutting section corresponding to a stable machining period and machining data for the cutting section, a cleansing unit (8) to acquire the machining condition for cutting and perform, in accordance with the acquired machining condition, cleansing of the machining data extracted by the cutting section extractor (4), a feature calculator (9) to calculate a feature based on the cleansed machining data, and a machining diagnoser (11) to diagnose machining based on the calculated feature.

A cutting tool includes: a cutting section having a cutting edge; a sensor provided in the cutting section; and a communication unit provided in the cutting section. The communication unit transmits, to a processing device provided outside the cutting tool, measurement information relating to measurement results of the sensor and including serial numbers corresponding to the measurement results after a timing of a start of cutting by the cutting edge.

A dental milling machine for producing a dental object having a sensor for detecting signals caused by a machining tool and an electronic controller for controlling the machining tool based on the detected signals.

A first plate includes: a first hole penetrating a first front surface and a first back surface; an opening edge constituting the first hole, a front-side first opening edge being provided in the first front surface; a back-side first opening edge constituting the first hole, the back-side first opening edge being provided in the first back surface; and a first chamfered portion provided on at least one of the front-side first opening edge and the back-side first opening edge, a second plate includes: a second hole including a back-side second opening edge provided in at least a second back surface; and a back-side second chamfered portion provided at the back-side second opening edge, an axis of the first hole and an axis of the second hole are coaxial, and the at least one of the first chamfered portion and the back-side second chamfered portion have a cutting mark.

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.

A method and a system for estimating state of wear of a cutting tool mounted on a machine tool. The system includes an acquisition module configured to acquire at least one operating signal specific to the cutting tool during at least one interaction of introduction or of extraction between the cutting tool and the material to be machined, and a microprocessor configured to generate from the at least one operating signal a wear signature of the cutting tool and to determine the state of wear of the cutting tool as a function of the signature.

A method and a system for estimating state of wear of a cutting tool mounted on a machine tool. The system includes an acquisition module configured to acquire at least one operating signal specific to the cutting tool during at least one interaction of introduction or of extraction between the cutting tool and the material to be machined, and a microprocessor configured to generate from the at least one operating signal a wear signature of the cutting tool and to determine the state of wear of the cutting tool as a function of the signature.

The invention relates to a machining tool for machining a workpiece, including a main spindle with a driven shank, a tool holder which can be clamped in the shank, a cutting tool which is arranged on the tool holder, a distance sensor for determining a distance of the shank of the main spindle in relation to a reference point, and a control unit which is configured to perform compensation of the tool path during machining of the workpiece based on an elongation and displacement of the shank and an elongation of the tool holder holding the cutting tool, wherein the elongation and displacement of the shank is determined based on the distance determined using the distance sensor, and wherein the elongation of the tool holder holding the cutting tool is determined based on a rotational speed of the shank.

A tool holder having force sensors includes a first connection portion, a second connection portion, a first sensing portion, a second sensing portion, at least one first force sensor and at least one second force sensor. The first connection portion connects a cutting tool along an axis. The second connection portion connects a spindle along the axis. The first sensing portion having at least one first hole connects the first connection portion along the axis. The second sensing portion having at least one second hole connects the second connection portion and the first sensing portion. The first force sensor disposed in the first hole is to sense a torsional force. The second force sensor disposed in the second hole is to sense a bending force. The first sensing portion has a bending stiffness greater than that of the second sensing portion.

The wear status of a micro-endmill tool may be inferred by monitoring the chip production rate of the tool in operation. Chips may be extracted from a work area, captured on an adhesive surface, imaged, and counted to determine the chip production rate. When the rate of chip production falls, the feed rate of the micro-endmill may be increased to a level suitable for the current state of tool wear. In this manner, costly and inconvenient work stoppages to evaluate the wear status of a tool are eliminated.