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.
Claims19
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 a 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 a 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;
- and
- wherein the individual-cutting-edge sensor is an individual-cutting-edge force sensor for sensing an application of force to the individual cutting edge.
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 clamping of the tool, the tool clamping device is adjusted in a 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 motor-driven 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 a 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 a 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, the 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 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 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.