Abstract: A spindle arrangement for a machine tool comprising a spindle housing, which can be inserted and fixed in the machine tool, a spindle shaft being accommodated in the spindle housing, and a spindle head projecting from the spindle housing. At least one optical element is located on or near the spindle head, the optical element emits light in the region of the spindle head and/or to optically capture the region near the spindle head. At least one recess is provided on or near the spindle head, the optical element being insertable into the recess. The optical element is provided with at least two contacts arranged on the front face on different radial levels or in different axial regions relative to the screw axis on the end of the optical element which is screwed into the recess.

Abstract: There is proposed a method for examining the clamping state of a tool holder or tool which is clamped in a tool clamping device of a rotor unit of a motor-driven machine tool unit, with the spacing of the sensor head from a component of the rotor unit being measured, with a recording of at least one time and/or position-related sequence of the spacing values measured with the sensor head, wherein for improved integration of the method the recording of a first and a second time and/or position-related sequence is carried out during an acceleration of the rotation of the rotor unit with respect to the stator unit, in particular when the rotor unit is started up, wherein the time and/or position-related information of the sequence vectors of the first and/or second sequence is scaled using the respective associated current speed (v0).

Abstract: A motor spindle having a first electromagnetic drive system including a stator unit and a rotor unit which can rotate about an axis of rotation and has at least one rotor shaft and a tool receiver for receiving a machining tool. At least one bearing unit provides rotationally mounting of the rotor unit in the stator unit. The tool receiver is arranged in an end region of the rotor unit. The stator unit has a stator housing with an end section arranged in the end region of the rotor unit. The stator unit comprises at least one motor, having a second electromagnetic drive system, with a stator and a rotational rotor, wherein the rotor has at least one rotational housing element of the end section of the stator unit.

Abstract: A method for sensing a cutting-edge load in a motor-driven machine-tool unit having a stator unit and a rotor unit that is rotatable at least about an axis of rotation. The rotor unit includes a tool receiving unit that is adjustable along the axis of rotation and to which a clamping force can be applied, for fixing and clamping a releasably fixable tool shank of a tool. A tool head of the tool includes at least one individual cutting edge. A tool sensor is provided for sensing the load on the tool, the tool sensor being realized as an individual-cutting-edge sensor for sensing a cutting-edge load on the individual cutting edge.

Abstract: There is proposed a method for examining the clamping state of a tool holder or tool which is clamped in a tool clamping device of a rotor unit of a motor-driven machine tool unit, with the spacing of the sensor head from a component of the rotor unit being measured, with a recording of at least one time and/or position-related sequence of the spacing values measured with the sensor head, wherein for improved integration of the method the recording of a first and a second time and/or position-related sequence is carried out during an acceleration of the rotation of the rotor unit with respect to the stator unit, in particular when the rotor unit is started up, wherein the time and/or position-related information of the sequence vectors of the first and/or second sequence is scaled using the respective associated current speed (v0).

Abstract: Proposed is a machine tool unit with a stator unit and a rotor unit which is rotatable about an axis of rotation, wherein the rotor unit comprises a spindle head with a tool-holding unit having a tool-clamping device, wherein a testing device is provided for testing the clamping state of the tool, the testing device having precisely one sensor head for sensory detection. To improve the precision, the sensor head is arranged at a fixed position on the stator unit in such a manner that it measures the distance to an end-side part of the spindle head rotating relative to the sensor head, wherein the testing device is designed to record a temporal/position-related sequence of at least two distance values and/or of at least two successive series of in each case at least two distance values, in order to determine an axial run-out error.

Abstract: A spindle arrangement for a machine tool comprising a spindle housing, which can be inserted and fixed in the machine tool, a spindle shaft being accommodated in the spindle housing, and a spindle head projecting from the spindle housing. At least one optical element is located on or near the spindle head, the optical element emits light in the region of the spindle head and/or to optically capture the region near the spindle head. At least one recess is provided on or near the spindle head, the optical element being insertable into the recess. The optical element is provided with at least two contacts arranged on the front face on different radial levels or in different axial regions relative to the screw axis on the end of the optical element which is screwed into the recess.

Abstract: Proposed is a machine tool unit with a stator unit and a rotor unit which is rotatable about an axis of rotation, wherein the rotor unit comprises a spindle head with a tool-holding unit having a tool-clamping device, wherein a testing device is provided for testing the clamping state of the tool, the testing device having precisely one sensor head for sensory detection. To improve the precision, the sensor head is arranged at a fixed position on the stator unit in such a manner that it measures the distance to an end-side part of the spindle head rotating relative to the sensor head, wherein the testing device is designed to record a temporal/position-related sequence of at least two distance values and/or of at least two successive series of in each case at least two distance values, in order to determine an axial run-out error.

Abstract: A motor spindle having a first electromagnetic drive system including a stator unit and a rotor unit which can rotate about an axis of rotation and has at least one rotor shaft and a tool receiver for receiving a machining tool. At least one bearing unit provides rotationally mounting of the rotor unit in the stator unit. The tool receiver is arranged in an end region of the rotor unit. The stator unit has a stator housing with an end section arranged in the end region of the rotor unit. The stator unit comprises at least one motor, having a second electromagnetic drive system, with a stator and a rotational rotor, wherein the rotor has at least one rotational housing element of the end section of the stator unit.

Abstract: A release unit for a machine tool spindle, in particular motor spindle, for releasing a tool clamp, wherein the release unit comprises at least one adjustment element which can be linearly adjusted along an adjustment path for actuating the tool clamp, which release unit reduces the structural and/or economic complexity. This is achieved according to the invention in that the release unit is constructed as an electric motor which comprises an electromagnetic drive system having a hollow-cylindrical rotor shaft which rotates about a rotation axis, in that the linearly adjustable adjustment element is constructed as a spindle element of a conversion unit for converting the rotation of the electric motor into a linear adjustment and in that the rotor shaft is constructed as a spindle nut of the conversion unit which rotates about the rotation axis.

Abstract: A motor-driven machine-tool unit such as a multi-axis turning head or a motor spindle, having a stator unit and at least one rotor unit that is rotatable about a rotation axis, wherein the rotor unit comprises at least one tool receptacle unit having a tool clamping device that is adjustable in a longitudinal direction of the rotation axis and impingeable with a clamping force, for fixing and bracing a releasably fixable tool, wherein comparatively high requirements are met, in particular, in terms of the accuracy of the machining and/or the reliability in the machining. According to the present invention, this is achieved above all in that at least two clamping force sensors are provided for detecting the bracing of the tool clamping device, in particular the clamping force that is caused in the fixing and bracing.

Abstract: A motor spindle is provided for a machine tool comprising a spindle housing for stationary mounting on the machine, a spindle assembly, removable from the spindle housing, with a rotor that is supported in an integrated bearing unit so as to be rotatable relative to the spindle housing, and a clamping mechanism for a tool, the clamping mechanism being actuatable via a clamping piston that is movable in an annular cylinder in the spindle housing, wherein the spindle assembly is designed with internal cooling that is suppliable with a cooling fluid via a coolant supply, wherein the coolant supply has a rotary feedthrough with an interface between a stationary component and a rotating component of the coolant supply, and wherein the bearing unit is also removable when the spindle assembly is removed from the spindle housing.

Abstract: A motor-driven machine tool unit having a stator unit and at least one rotor unit having a rotor shaft that is rotatable about an axis of rotation. The rotor unit includes at least one first bearing unit arranged in the end region of a tool and/or workpiece receptacle, and a second bearing unit arranged at the opposite end region for mounting the rotor shaft in the stator unit. At least one electrical power transmission unit for transmitting electrical power between the stator unit and the rotor unit is provided. The problem addressed by the invention is that of better satisfying the increasing demands on modern machine tools or machine tool units. This problem is solved by the electrical power transmission unit is arranged in the end region opposite the tool and/or workpiece holder and/or on the second bearing unit.

Abstract: A motor-driven machine-tool unit such as a multi-axis turning head or a motor spindle, having a stator unit and at least one rotor unit that is rotatable about a rotation axis, wherein the rotor unit comprises at least one tool receptacle unit having a tool clamping device that is adjustable in a longitudinal direction of the rotation axis and impingeable with a clamping force, for fixing and bracing a releasably fixable tool, wherein comparatively high requirements are met, in particular, in terms of the accuracy of the machining and/or the reliability in the machining. According to the present invention, this is achieved above all in that at least two clamping force sensors are provided for detecting the bracing of the tool clamping device, in particular the clamping force that is caused in the fixing and bracing.

Abstract: A motor-driven machine tool unit having a stator unit and at least one rotor unit having a rotor shaft that is rotatable about an axis of rotation. The rotor unit includes at least one first bearing unit arranged in the end region of a tool and/or workpiece receptacle, and a second bearing unit arranged at the opposite end region for mounting the rotor shaft in the stator unit. At least one electrical power transmission unit for transmitting electrical power between the stator unit and the rotor unit is provided. The problem addressed by the invention is that of better satisfying the increasing demands on modern machine tools or machine tool units. This problem is solved by the electrical power transmission unit is arranged in the end region opposite the tool and/or workpiece holder and/or on the second bearing unit.