Ott-jakob Spanntechnik Gmbh

Bartholomäus Reisacher

Josef Greif

Peter Mohr

Conrad Rösch

Wolfgang Bechteler

Florian Merz

In a device for recording deformation of a rotor head of a work spindle, at least one magnet is arranged on a stator or a rotor of the spindle, the magnetic field of which penetrates a measurement section of the rotor head, which is traversed by an axial flow of force during clamping of a tool or tool carrier on the rotor head by a tool clamping device arranged in the rotor. The rotor head has a magnetizability or magnetization that varies in the axial direction in its measurement section, and at least one direction-sensitive magnetic field sensor is arranged on the stator radially opposite the measurement section, which is connected to an evaluation device to determine axial deformation of the rotor head as a function of rotation angle from the strength of the magnetic field as a function of rotation angle recorded by the sensor during one revolution of the rotor.

Device and method for monitoring a work spindle

A clamping device for clamping a workpiece or a tool or, more specifically, a tool holding fixture in a machine part of a machine tool includes a tension rod slidably mounted within the machine part; a clamping set movable by the tension rod between clamped and released positions; a tension spring dedicated to the tension rod so as to generate the pull-in force of the clamping set; and a release mechanism, by which the clamping set can be moved against the force of the tension spring into the released position by the tension rod. To make possible effective clamping at optimum force, the tension spring is clamped between first and second rod parts of the tension rod. The second rod part can move relative to the first rod part, and, as the clamping set moves into the released position, is compressed on both ends by the release mechanism by moving the two rod parts in opposite directions.

Clamping device and machining unit comprising such a clamping device

A clamping assembly for a clamping device for clamping of a workpiece or tool or a toolholder on machine component with a clamping cone movable axially via a tension rod and several clamping elements arranged spaced from each other in the peripheral direction on the outside of the clamping cone, which can be moved between a radially outer clamped position and a radially inner released position by axial movement of the tension rod. The clamping cone includes two parts movable opposite each other in the axial direction.

Clamping assembly and clamping device with such a clamping assembly

A clamping device for clamping a workpiece or a tool or a tool holder to a machine component of a machine tool, having an axially movable tension rod, a clamping assembly which can be moved by the tension rod between a clamped position and a released position, a spring assembly dedicated to the tension rod with a plurality of series-connected spring units for generating the clamping and draw-in force of the clamping assembly, and a releasing unit by which the clamping assembly can be moved by the tension rod against the force of the spring assembly into the released position. To ensure the most uniform load possible, the axial spring deflection of the spring units is limited by a stop when the spring assembly is compressed.

Clamping device

A clamping device for clamping a workpiece or a tool or a tool holder to a machine component of a machine tool, including an axially movable tension rod, a clamping assembly which can be moved by the tension rod between a clamped position and a released position, a spring assembly dedicated to the tension rod for generating the clamping and draw-in force of the clamping assembly, and a releasing unit by which the clamping assembly can be moved by the tension rod against the force of the spring assembly into the released position. The spring assembly has a minimum of one spring unit with a plurality of flexible spring members disposed between a first and a second spring holder, with the first and second spring holders being secured against torsion relative to the tension rod.

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Buchloe, Germany

Bartholomäus Reisacher