A gripping device is provided in a turret-type tool magazine of a machine tool and grips a tool or a tool holder that holds the tool. The gripping device includes: a pair of arms configured to grip the tool or the tool holder by pinching the tool or the tool holder between the arms, a main body part configured to support the pair of arms so that each of the paired arms swings in the pinching directions to pinch the tool or the tool holder between the arms; and an angle detector configured to detect a physical quantity indicating a swing angle of the arm.

A rotating tool is held in a tool holder. The tool holder includes a male tapered portion. The tool holder is rotated by a rotating-tool main shaft. The rotating-tool main shaft includes a hollow main shaft. The hollow main shaft includes a circular conical hole formed in a tip and corresponding to the male tapered portion. The hollow main shaft includes a fluid passage to detect that the male tapered portion is properly attached to the circular conical hole, and an opening to blow out a fluid. The opening is provided in a portion offset from the circular conical hole.

A pressure applying system using a fixed vise and an adjustable vise. The fixed base utilizes strain gages to measure an amplitude of forces applied to the fixed base through a working member from the adjustable base. The adjustable base utilizes a bi directional worm screw to apply a linear force to the working member relative to the fixed base.

A tapered tool holder fixture for installing a retention knob into a tool holder and to determine whether the retention knob has produced distortions in a tool holder surface. A support stand supports a test gauge assembly that includes a mounting ring to which a tool holder is clamped, a gauge portion for receiving a tool holder surface and a camming ring for moving the gauge portion into and out of engagement with the tool holder surface. The mounting ring, camming ring and gauge portion are held together by bolts which allow the relative movement between the gauge portion and a tool holder held by the mounting ring and allow relative rotation between the camming and mounting rings whereby a rotatable detent arrangement moves the gauge portion towards and away from the tool holder. An indicator monitors the position of the gauge portion in order to detect distortions.

An automated tool clamping device, in particular a fully automated tool clamping device is configured for a clamping-in of at least one tool in a tool chuck by a tightening of a union nut of the tool chuck and/or for a declamping of the tool out of the tool chuck by a release of the union nut, and comprises a clamp element, which is at least configured to generate a connection, in particular a clamp connection, with the union nut of the tool chuck, and comprises a torque receiving element, which is at least configured to receive at least a large portion of a torque occurring during a tool clamping process, in particular during a tool clamping-in process and/or a tool declamping process.

A machine tool includes: a tool holder which includes a key groove; a spindle drive unit which includes a spindle key that can be fitted into the key groove of the tool holder and a spindle and which removably holds the tool holder; a tool exchanger which includes a grip key and a grip that holds the tool holder at a fixed position with respect to the spindle; and a numerical controller which controls the tool exchanger so as to fit and remove the tool holder with respect to the spindle, and the numerical controller controls the spindle drive unit such that when the tool holder is fitted to the spindle, in a state where the key groove of the tool holder is inserted in the spindle key, the spindle is rotated to press the spindle key to the key groove so as to determine the phase of the tool holder with respect to the spindle.

A clamping force measuring instrument for a radial clamping device having at least one force sensor for detecting a clamping force of the clamping device and an evaluation device for evaluating sensor data of the force sensor. The clamping force measuring instrument is embodied as a modular clamping force measuring instrument, having an evaluation module a sensor module. The sensor module includes at least one measurement surface and the force sensor. The evaluation module has a radio interface, a memory and/or a display device. The sensor module and the evaluation module are configured for coupling to one another by a coupling device and each has a data connection device. The data connection devices are connected to one another to produce a data connection in the event of the sensor module being coupled to the evaluation module.

A spindle nose for a machine tool spindle. The spindle nose has a longitudinal axis and a receiving end at which a conical receiving area opens. The receiving area tapers conically away from the receiving end in the direction of the longitudinal axis for receiving a tool shaft cone. A circumferential wall surrounds the receiving area and forms a circumferential contact edge. The contact edge has flat contact surfaces on which contact surfaces of the tool shaft cone rest when the tool is clamped in the tool spindle. The spindle nose defines blind receiving bores leading perpendicularly to the flat contact surfaces and which end below the flat contact surfaces. The contact edge is divided into at least four segments with the same angle. At least one receiving bore is formed in each of the segments. A sensor is arranged in each receiving bore.

In a rod hole (19) of a holding rod (18) held in a guide hole (17) of a piston (10), a limit switch (20) is fixed and a detection rod (21) is inserted. A first engagement ball (30) and a second engagement ball (40) are configured to be in contact with a first cam surface (32) and a second cam surface (42), respectively, which are provided at an outer periphery of the detection rod (21). The first engagement ball (30) and the second engagement ball (40) are configured to be in contact with a first pushing portion (35) and a second pushing portion (45), respectively, which are provided inside the guide hole (17). The position of the piston (10) is detected by electrically or electronically detecting the movement of the detection rod (21) by the limit switch (20).

A method is provided for determining a pressure distribution of a molding tool device (1) for reshaping a sheet metal component (2). The pressure distribution represents a load on the sheet metal component (2) caused by reshaping in the molding tool device (1). The method includes introducing a piezoelectric material (3) into a raw material (12) of the sheet metal component (2) to form a composite sheet metal component (4) that provides an electrical voltage under mechanical loads. The method proceeds by arranging the composite sheet metal component (4) in the molding tool device (1) and reshaping the composite sheet metal component (4) with the molding tool device (1). The method then uses at least one sensor device (5) for detecting spatially resolved electric voltage signals that emanate from the composite sheet metal component (4) during the reshaping and determining the pressure distribution using the detected spatially resolved voltage signals.