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AssigneeOtt-Jakob Spanntechnik GmbH
InventorsJosef Greif, Wolfgang Bechteler, Bartholomäus Reisacher, Jr., Florian Merz
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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.
A device for monitoring of a work spindle (1), wherein at least one magnet is arranged on a stator or on a rotor of the work spindle, the magnetic field of which penetrates a measurement section of the rotor head, which is traversed by an axial flux during clamping of a tool or tool carrier on the rotor head by means of a tool clamping device arranged in the rotor, wherein the rotor head in the measurement section has a magnetizability or magnetization varying in an axial direction, wherein at least one direction-sensitive magnetic field sensor is arranged on the stator radially opposite the measurement section, and wherein the magnetic field sensor is connected to an evaluation device, which is set up to determine a measure of axial deformation of the rotor head as a function of a rotation angle from the strength of the magnetic field as a function of rotation angle recorded by the magnetic field sensor during one revolution of the rotor.
Dependencies are inferred from the claim text.