Machine-tool unit having a tool sensor for sensing a cutting-edge load on a tool
AssigneeFranz Kessler GmbH
InventorsJoachim VAN SPRANG, Harald WEING, Daniel WEIß
Life of this patent
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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.
Claims20
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 comprising at least one tool receiving unit for receiving a tool, the tool receiving unit comprising a tool clamping device, which is adjustable in the longitudinal direction of the axis of rotation and to which a clamping force can be applied, for fixing and clamping a releasably fixable tool shank of the tool, a tool head of the tool comprising at least one individual cutting edge, there being at least one tool sensor provided for sensing the load on the tool, wherein the tool sensor is an individual-cutting-edge sensor for sensing a cutting-edge load on the individual cutting edge, and wherein the stator unit comprises at least the individual-cutting-edge sensor.
A method for sensing a cutting-edge load on a single cutting edge of a tool, there being used a tool head of the tool that has at least one individual cutting edge, the tool and/or a tool holder for holding the tool detachably fixed to a tool clamping device of a tool receiving unit of a rotor unit, being received by a motor-driven machine-tool unit,
- wherein in the clamping of the tool, the tool clamping device is adjusted in the longitudinal direction of the axis of rotation and/or arranged in a spindle head and/or the tool receiving unit of the rotor unit, the machine-tool unit having a stator unit relative to which the rotor unit is mounted so as to be rotatable about an axis of rotation, at least one tool sensor is used to sense the load on the tool, the tool sensor being an individual-cutting-edge sensor for sensing a cutting-edge load of the individual cutting edge, wherein the method comprises the following steps:
- arranging the individual-cutting-edge sensor on the stator unit,
- providing at least one sensor head of the individual-cutting-edge sensor for the purpose of determining a distance between the stator unit and/or the sensor head and at least a part of the rotor unit and/or of the tool receiving unit /spindle head, this distance being altered by the cutting-edge load on the individual cutting edge,
- measuring the distance from a part of the rotor unit and/or of the tool receiving unit /spindle head,
- recording at least one time-related and/or position-related sequence of the distance values measured by means of the individual-cutting-edge sensor and/or sensor head, and
- determining an axial runout and/or a radial runout and/or an angular change and/or a torsional moment exclusively taking into account the time-related and/or position-related sequence of the measured distance values to the part of the rotor unit /tool receiving unit /spindle head rotating relative to the individual-cutting-edge sensor and/or sensor head.
Dependencies are inferred from the claim text.