Tool holder for use in a machine tool with energy-autonomous sensors

Abstract

Tool holder (1) for holding a tool (4) and for the rotational coupling of the tool (4) to a rotary drive of a machine tool, wherein in an operating state the tool holder and the tool held therein rotate about a working axis (A) driven by the rotary drive, wherein the tool holder comprises: a) at least one flow channel (5) surrounded by a channel wall (3) for the flow of a fluid cooling and / or lubricating medium (KS) to the tool (4) in the operating state, b) at least one measuring device (30) for measuring at least one operating variable in the operating state, c) at least one wireless transmission device (31) for wirelessly transmitting measurement data or measurement signals from the measuring device (30) and c) an energy generator (11, 12, 15, 16, 19, 20) for autonomously supplying the at least one measuring device (30) and the at least one transmission device (31) with electrical energy, d) where the energy generator d1) at least one moving body (11, 12) arranged in the flow channel (5) and, in the operating state, in the fluid cooling and / or lubricating medium (KS) flowing through it, and further d2) at least one electromechanical transducer (15, 16, 19, 20) coupled to the moving body (11, 12) for converting a movement (V1, V2, V3, V4) of the at least one moving body (11, 12) generated by the flowing cooling and / or lubricating medium (KS) into electrical energy for the at least one measuring device (30) and the at least one communication device (31).

Description

The invention relates to a tool holder (or: a tool holder or a tool chuck) for holding a tool and for rotationally coupling the tool to a rotary drive of a machine tool, wherein in an operating state the tool holder and the tool held therein rotate about a working axis driven by the rotary drive.In material processing processes for processing workpieces by means of tools, machine tools are used for the machine movement of the tools. A machine tool comprises at least one tool holder for receiving the tool(s) and at least one electrically operated drive which is motion-coupled to the tool holder. A control system controls or controls the drive for the precise movement of the tool and for this purpose generally comprises control or control software or programs, usually numerical control(s) (NC) or else machine learning. The movement of the tool is generally composed of a self-rotation or rotational movement about a tool axis driven by a rotary drive with corresponding speed control and a translatory movement along a trajectory, for example an axial feed. Typical tools with such movements are tools operating in a cutting or also non-cutting manner, such as milling tools, drilling tools and thread tools, such as screw tap, thread milling tool or also thread veneer.For a more accurate process technique, more and more measurement data and sensor signals are used for feedback to the control system and the movement control of the tool.Most frequently, measurement data or sensor signals of kinematic, in particular translatory and / or rotatory, measurement variables such as location / position, speed, acceleration, force, rotational speed, torque, changes in length, imbalance or moments of inertia, etc., are determined, but also of other physical measurement variables such as temperature or pressure and optionally further variables are determined from these directly measured measurement variables by derivatives or transformations, for example time derivatives or changes or also frequency analyses.Such measurements are usually made on the drive system of the machine tool by means of sensors or measuring devices attached there or also by evaluating the electric drive current. For high process accuracy, there must be a rigid coupling between tool and drive via the tool holder, at least to a very good approximation, so that as a rule a clear relationship of the measured values at the drive system with the values at the tool or machining location can also be assumed.Measuring such measured variables close to the tool and the machining location at the tool holder would be desirable and would provide even more accurate information, but is difficult in practice because of the harsh conditions for the sensors in the machining zone, particularly because of the necessary arrangement or integration at the tool holder rotating at high rotational speeds or because of the generation of chips. The signal or data transmission can indeed take place wirelessly via wireless transmission devices known per se, such as e.g. WLAN or radio, which are arranged on the tool holder.An additional hurdle for the integration of measuring devices or sensors and their associated wireless transmission devices on the tool holder, however, is in practice the energy supply of the measuring devices or sensors and of the transmission devices with electrical energy. An energy supply via electrical lines is possible in the rarest cases because of the rapid rotation; an inductive supply is likewise of little use. An energy supply by means of local electrical batteries or batteries is not expedient on account of the requirement for uninterrupted production monitoring in combination with continuous operation of the corresponding installations.A series of solutions for the contactless or remote energy supply of sensors on tool holders have already been proposed, of which, however, none of them have yet become decisive in the series.DE 295 07 033 U1 discloses a threaded cutting chuck with a monitoring system in which forces, movements or changes in length are detected and evaluated by an electronic system operated in the chuck with a built-in energy supply and a signal is transmitted to an evaluation unit in a contactless manner via a transmitter, in particular an infrared light emitting diode. A power supply is proposed which converts light from lamps arranged from the outside into electrical energy by means of solar cells on the outside of the threaded cutter chuck, which is fed into an energy store, preferably a capacitor.EP 3 501 688 B1 discloses a threaded roller head in which an energy extraction device is integrated, which extracts electrical energy from a rotation of the rollers of the threaded roller head by induction during operation of the threaded roller head.DE 10 2015 013 646 A1 discloses a machining tool, in particular a milling tool, with indexable inserts, in which a piezoelectric element arranged below an indexable insert as a force sensor converts the mechanical energy during machining into an electrical voltage, with which a lighting means on the tool is supplied, which lighting means reproduces the state of the indexable insert with respect to cutting forces which occur.WO 2014 / 195057 A1 describes a tool clamping system having a rotationally drivable tool holder for clamping a tool and having a device for generating electrical energy from mechanical or thermal energy of the tool clamping system. The device comprises at least one piezoelectric element for generating a voltage from mechanical vibration energy of the rotating tool clamping system in a region between a cutting edge or a cutting-edge carrier and a shank of the tool.EP 3 539 717 B1 proposes a machining tool for machining, comprising a tool body and a generator unit for obtaining electrical energy which is to be used in the tool, in particular for a wireless sensor of a monitoring system. The generator unit has a magnet ring which is mounted on the tool body such that it can rotate about a central axis of the tool body and has an arrangement of magnets which follow one another at a distance in the circumferential direction, and a vibration beam which has a magnet at one end and has a piezoelectric plate on an upper side or lower side. The magnetic ring is rotated by a flow of a gaseous or liquid medium used as a cooling medium or for discharging chips. The magnets of the rotating ring continuously flex the vibrating beam back and forth by the magnetic interaction with the magnet at the end of the vibrating beam, and the vibrating beam is thereby caused to oscillate following the rotation of the magnet ring. The bending stresses in the vibration beam, which are in turn generated as a result, convert the piezoelectric plate into an electrical alternating voltage, which is supplied to an electrical energy store or directly to a wireless sensor. The gaseous or liquid medium is passed through a central channel running along the central axis through the tool body and then through two smaller channels running transversely outwards adjoining the central channel and two annular flow paths, whereby two semicircular annular flows of the medium are generated, which bring and hold the magnetic ring in rotation. After passing through the respective annular flow path, the medium is then finally conducted through a channel running obliquely forward in each case to the machining location for cooling and / or chip removal. The vibration beam also extends transversely to the central axis and is fastened at one end to a fastening point on an outer side of the tool body and projects outwards, wherein the magnet is fastened to the outer end and the piezoelectric plate is arranged between the two ends, that is to say between the magnet and the fastening point.This EP 3 539 717 B1 can be considered as the closest prior art. In this solution known from EP 3 539 717 B1, the flow of the medium drives the magnet ring in rotation and thus indirectly through the magnetic interaction between the rotating magnets and the magnet of the vibration beam also drives the vibration beam. However, the vibration beam is not disposed in the flowing medium. The construction is expensive and also has relatively high losses due to the moving masses and friction.The present invention is now based in particular on the object of configuring a tool holder of the type mentioned at the beginning in such a way that autonomous energy supply of measuring device(s) and / or sensor(s) and wireless signal or data transmission device(s) is possible.In an embodiment according to claim 1, a tool holder (or: a tool holder or a tool chuck) is provided for receiving the tool and for rotationally coupling the tool to a rotary drive of a machine tool. In an operating state, the tool holder and the tool held therein rotate or rotate about a working axis, driven by the rotary drive. The tool is preferably a material-processing tool, in particular a thread tool, such as, for example, a tap, thread flute or thread milling cutter, or a drilling tool or a milling tool.The tool holder now comprises at least one flow channel surrounded by a channel wall for the flow of a fluid cooling and / or lubricating medium to the tool in the operating state.Fluid is intended to mean that the coolant and / or lubricant or medium is present in gaseous or preferably liquid form or else in the form of a mist or aerosol (liquid particles in gas) or else in the form of a suspension (solid particles in liquid). The coolant and / or lubricant is in particular a liquid oil, but can also be an oil mist or an oil aerosol.Furthermore, the tool holder comprises at least one measuring device (or: sensor device) for measuring at least one operating measured variable, in particular in the operating state, and at least one wireless transmission device (or: communication device) for wirelessly transmitting measurement data or measurement signals of the measuring device and optionally also for receiving signals or data.The measurement data or sensor signals acquired by the measuring device can result from the measurement of a plurality of operating measurement variables, in particular kinematic, for example translatory and / or rotatory, measurement variables such as location / position, speed, acceleration, force, rotational speed, torque, changes in length, imbalance or moments of inertia and the like, but also of other physical measurement variables such as temperature or pressure or flow rate or volume flow of the flowing medium in the flow channel.The measuring device can also comprise an evaluation device or signal processing device and thus already make available (partially) evaluated or processed measurement data or measurement signals. In addition to the directly measurable measured variables, derivatives or transformations of the measured variables can also be determined or, in other words, further variables can be determined from these directly measured measured variables by derivatives or transformations, for example time derivatives or changes such as, for example, the speed as a time derivative of a position signal or a time pressure change in the flowing medium or also frequency analyses of the signals.Furthermore, the tool holder comprises an (autonomous) energy generator (or: an energy converter) for autonomous supply of the at least one measuring device and the at least one transmission device with electrical energy. The energy generator draws the energy from the flowing cooling and / or lubricating medium in the flow channel. For this purpose, the energy generator comprises at least one moving body arranged in the flow channel and, in the operating state, in the fluid cooling and / or lubricating medium flowing through it and around which it flows, and at least one electromechanical converter coupled to the moving body for converting a movement of the at least one moving body generated by the flowing cooling and / or lubricating medium into electrical energy for the at least one measuring device and the at least one transmission device.The moving body is preferably a vibrating body which is directly caused to oscillate by the flowing fluid medium.The flow channel, the measuring device, the transmission device and the energy generator are surrounded by the tool holder and thus rotate together with the tool holder, i.e. are correspondingly insert- and resistant under the corresponding high rotational forces and difficult operating conditions.The or each moving body is generally set into flow-induced movement or vibration. In this case, the body is surrounded by cooling and / or lubricating medium on both sides, the flow being torn off at a minimum earlier point on one side. Due to the minimum deflection, which arises due to the resulting force occurring, the body is deflected in the opposite direction and the flow break occurs on the other side of the body and this is deflected back in the other direction. This process is repeated. Amplitudes and frequencies of this movement or oscillation result in particular from the geometric dimensions and properties of the movement body, in particular cross section, external dimensions, modulus of elasticity or rigidity, and type of cooling and / or lubricating medium and its pressure.Advantageous embodiments and refinements emerge in particular from the dependent patent claims.In an advantageous embodiment, the or each movement body is mounted or held on the channel wall in bearing regions, in particular end regions, in particular in corresponding bearings and can move or oscillate between the bearing regions or the bearings. The bearing regions are preferably arranged at two ends of the movement body facing away from one another. Preferably, the bearing regions or the bearings are preferably provided on wall regions on the duct wall which are situated opposite one another.In a particularly advantageous embodiment, at least one corresponding electromechanical transducer is arranged in or associated with at least one or each bearing region or at least one or each bearing of the movement body.Alternatively or additionally, however, at least one electromechanical transducer can also be arranged on the movement body in a region between the bearing regions or the bearings.The at least one movement body is preferably elongated or beam-shaped along a longitudinal direction. Preferably, the at least one movement body runs at least approximately linearly without flowing cooling and / or lubricating medium. In a particularly advantageous embodiment, the at least one movement body extends along the longitudinal direction between the bearing regions or bearings and / or has a length which corresponds to a diameter of the flow channel at this point with the movement body or its bearings.It is particularly expedient if the or each movement body extends with its longitudinal direction transversely to the flow direction of the fluid cooling and / or lubricating medium and / or perpendicularly to the working axis, wherein the working axis preferably runs, preferably centrally, through the movement body or its cross section, in particular orthogonally.Preferably, in particular in the same flow channel or around which the same cooling and / or lubricating medium flows, at least two movement bodies are provided, which are preferably arranged one behind the other, as viewed axially to the working axis, and / or the longitudinal direction or directions of which are directed obliquely, in particular perpendicularly, to one another.A cross section of the or each movement body, preferably perpendicular to the longitudinal direction, can remain or be substantially constant over the length or in the longitudinal direction of the movement body in one embodiment or else can change in another embodiment, for example become larger from the end or bearing regions towards the centre or towards the working axis.Advantageous cross-sectional shapes of the movement body, preferably in the cross-section perpendicular to the longitudinal direction, have as outer contours a circle, a drop, a circle segment, an arc triangle or a standion and / or mirror-symmetrical outer contours.In a particularly advantageous embodiment, at least one or also each electromechanical transducer(s) is a piezoelectric transducer. However, at least one inductive converter and / or at least one capacitive converter can also be provided as an electromechanical converter.Preferably, at least one electromechanical converter converts the movement or a deformation of the movement body caused by the movement into electrical energy, in particular an electrical voltage or an electrical current.At least one movement body can also comprise a turbine or a blade wheel, which is set into a rotational movement by the flowing cooling and / or lubricating medium and in which the electromechanical converter converts this rotational movement into electrical energy by electromagnetic induction, in particular in the manner of an alternating current generator or direct current generator.The invention is explained in more detail below with reference to exemplary embodiments. Reference is also made to the drawing and its figures (FIG), in which FIG. 1 shows a tool holder with a moving body for generating energy in a cross section, FIG. 2 shows the tool holder according to FIG. 1 in a longitudinal section, wherein the cross-sectional plane of FIG. 1 is marked with I-I, FIG. 3 shows a tool holder with two moving bodies for generating energy in a cross section, FIG. 4 shows the tool holder according to FIG. 3 in a longitudinal section, wherein the cross-sectional plane of FIG. 3 is marked III-III, and FIGS. 5 to 14 show exemplary embodiments for movement bodies in each case in a cross sectioneach of which is schematically illustrated. Corresponding parts and sizes are provided with the same reference numerals in FIGS. 1 to 14.FIGS. 1 and 2 show a first exemplary embodiment of a tool holder 1 and FIGS. 3 and 4 show a second exemplary embodiment of a tool holder 1.The tool holder 1 is coupled on a spindle side to a drive spindle 2 of a rotary drive of a machine tool and on a tool side a tool 9 is held or accommodated in a collet 8 (or another tool holder, e.g. a quick-change insert).Without limiting generality, the tool 4 is preferably a thread-generating tool, in particular a tap, a thread flute or a thread milling cutter, but can also be a drill or another rotating tool.The tool holder 1 and the tool 9 are configured coaxially about a common axis of rotation, the working axis A, and preferably substantially rotationally symmetrical to the working axis A. The collet chuck 8 is in turn held within a wall which surrounds a first channel section 6 of the flow channel 5 as channel wall 3. In an operating state, the tool holder 1 and the tool 9 held therein rotate about the working axis A, driven by the rotary drive or the drive spindle 2.The first channel section 6 of the flow channel 5 serves, in particular in the operating state, for the supply or the flow of fluid, generally liquid, cooling and / or lubricating medium KS in the flow direction indicated by the arrows, which is preferably parallel or axial to the working axis A in the direction of the tool 9 and the machining location located there for cooling and or lubrication. A diameter of the first channel section 6 is denoted by D 1. A second channel section 7 within the collet chuck 8 with a smaller diameter D 2 than the diameter D 1 of the first channel section 6 continues the first channel section 6 and finally guides the medium KS to the tool 9 or internal channels within the tool 9.Now, in particular an oil or also an oil aerosol is used as cooling and / or lubricating medium or substance KS. The pressure of the cooling and / or lubricating medium KS is typically between 4 bar and 80 bar.Furthermore, at least one measuring device 30 and at least one wireless transmission device 31 are arranged or integrated on or in the tool holder 1.The measuring device 30 measures at least one operating measured variable, in particular in the operating state, but optionally also outside the operation. The operating measured variables are preferably kinematic, for example translatory and / or rotatory, measured variables such as location / position, speed, acceleration, force, rotational speed or torque or else length changes, imbalance or inertia moments. However, other operating measured variables such as temperature or pressure or flow rate or volume flow of the flowing medium KS in the flow channel can also be detected by the measuring device 30. The measuring device 30 is preferably also provided for a first processing and / or evaluation of its measurement signals or measurement data or sensor signals.The at least one wireless transmission device 31 is provided for wirelessly (digitally or analog) transmitting the measurement data or measurement signals of the measurement device 30 and can, for example, establish a WLAN connection or radio connection or other wireless connection to an external transmission device 41 of an external control unit 40, in particular machine control, for transmitting the measurement data or measurement signals or also control signals in the opposite direction.For the measuring device 30 and the transmission device 31, an autonomous energy generator (or an autonomous energy supply) is now provided for the autonomous supply of electrical energy to the measuring device 30 and the transmission device 31.In the exemplary embodiment according to FIGS. 1 and 2, the energy generator comprises a moving body 11 and in the exemplary embodiment according to FIGS. 3 and 4 a second moving body 12 in addition to the moving body 11. Furthermore, the energy generator comprises at least one electromechanical converter, in particular converters 15, 16, 19 and 20, for converting a movement of the at least one moving body 11 or 12 generated by the flowing cooling and / or lubricating medium KS into electrical energy for the at least one measuring device 30 and the at least one transmission device 31.In both exemplary embodiments, the movement bodies 11 and 12 are each arranged in the flow channel 65, preferably in the first channel section 6 of the flow channel 5 having the larger diameter D 1, and in the operating state are situated in the fluid cooling and / or lubricating medium KS flowing through.As a result of the flowing cooling and / or lubricating medium KS, each moving body 11 and 12 is set into oscillations, i.e. can also be designated as an oscillating body.Preferably, each moving body 11 and 12 is mounted or held on the channel wall 3 in bearing regions or bearing sections, in particular end regions or end sections, preferably at two mutually remote ends of the moving body, in particular in corresponding bearings 13 and 14 or 17 and 18 in or on the channel wall 3, preferably on mutually opposite wall regions on the channel wall ( 3), and can thus oscillate between the bearing regions or the bearings.Preferably, at least one electromechanical transducer 15, 16, 19 or 20) is assigned to at least one or also each bearing region or at least one or also each bearing 13 and 14 or 17 and 18 of the movement body 11 or 12.In an advantageous embodiment, as illustrated, the at least one or each movement body 11 and 12 is elongated or beam-shaped along a longitudinal direction and runs, at least without flowing cooling and / or lubricating medium KS, at least approximately linearly or linearly and / or preferably extends along the longitudinal direction between the bearing regions or bearings. The movement body 11 or 12 preferably has a length which corresponds to the diameter D 1 of the flow channel at this point.It is particularly advantageous if, as illustrated, the or each moving body 11 and 12 extends with its longitudinal direction preferably transversely to the flow direction of the fluid cooling and / or lubricating medium KS or perpendicularly to the working axis A, wherein preferably the working axis A runs, preferably centrally, through the moving body 11 and 12, in particular orthogonally.In the embodiment with at least two moving bodies 11 and 12, as shown e.g. in FIGS. 3 and 4, these are preferably arranged one behind the other, viewed axially to the working axis A, and / or their longitudinal directions are directed obliquely, in particular perpendicularly, to one another, i.e. the moving bodies cross one another in an axial projection. This crossed arrangement of two moving bodies 11 and 12 in the flow has the advantage that the flow energy can be detected and converted more uniformly.An influence on the efficiency of the vibration and energy generation is the shape of the cross section of the moving body, in particular 11 or 12, preferably perpendicular to the longitudinal direction of the moving body. The cross section of the or each moving body, in particular 11 or 12, can remain substantially constant over the length of the moving body in one embodiment or can also change in another embodiment, for example become larger from the bearing regions towards the center or working axis A.The working axis A can extend in particular through the cross section, in particular through a center, not designated in more detail, or a center point of the cross section of the movement bodyIn FIGS. 5 to 14 some cross-sectional shapes are shown which have been found to be suitable for the moving body 11 or 12.In embodiments according to FIGS. 5 and 6, the outer contour 21 forms a complete circle.In the embodiments illustrated in FIGS. 7 and 8, the outer contour 22 is designed in the form of a drop with a circular arc 22C, which merges via, for example, approximately straight intermediate sections into a corner 22D.FIGS. 9 and 10 show embodiments of a cross section of a movement body, for example 11 or 12, with a pitch circle or circle segment of corresponding outer contour 23, which is composed of a circular arc section 23D and a chord 23C.Particular embodiments of a cross section according to FIGS. 11 and 12 are distinguished by an outer contour 24 with a triangular basic shape with corners 24C, 24D and 24E, between which arc-shaped sides or arc sides 24F, 24G, 24H with rounded outwardly protruding regions lie, so that an arc triangle is thus formed.A step-shaped embodiment of a cross section is shown in FIGS. 13 and 14 with an outer contour 25 which, in the manner of a step, is composed of two, in particular semicircular, circular arcs 25C and 25D and straight sections 25E and 25F running parallel to one another in between.The embodiments according to FIGS. 5 and 6 and 7 and 8 and 11 and 12 and 13 and 14 have a mirror-symmetrical shape at least in the outer contour, wherein the central axis of the flow channel or the working axis A can run both along the mirror-symmetry axis and obliquely or even orthogonally thereto, preferably through the cross section.In the embodiments according to FIGS. 5, 7, 9, 11 and 13, the cross section is solid or formed as a solid material cross section 21A, 22A, 23A, 24A or 25A. In the embodiments according to FIGS. 6, 8, 10, 12 and 14, the cross section or the movement body is hollow, i.e. provided with a cavity 21B or 22B or 23B or 24B or 25B, which is bounded in particular by an inner contour running parallel to the outer contour 23, so that a largely constant wall thickness is achieved. In all hollow embodiments, the inner contour or inner surface can also be designed differently from the outer contour, so that a changing wall thickness is realized. This may possibly also further enhance asymmetry.In addition, a thickness d 1 or a dimension of the cross section of one or of the movement body 11 or 12 can be at most one fifth, preferably at most one tenth, of the length or dimension in the longitudinal direction of the movement body 11 or 12 or of the diameter D 1 of the flow channel 5 at the location with the movement body and / or in which the flow cross section of all movement bodies is below a quarter of the flow cross section of the flow channel.The use of at least one piezoelectric transducer or piezoelectric element as electromechanical transducer 15, 16, 19, 20 is particularly advantageous, but at least one inductive transducer and / or at least one capacitive transducer can also be used. The at least one electromechanical converter preferably converts the movement or a deformation of the movement body caused by the movement into electrical energy, in particular an electrical voltage or an electrical current, which is supplied to the measuring device 30 and the transmission device 31, optionally with smoothing.In an embodiment which is not illustrated, at least one movement body can also comprise a turbine or a blade wheel which is set into a rotational movement by the flowing cooling and / or lubricating medium and in which the electromechanical converter converts this rotational movement into electrical energy by electromagnetic induction, in particular in the manner of an alternator or DC generator.List of reference characters1 Tool holder 2 Drive spindle 3 Channel wall 5 Flow channel 6 First channel section 7 Second channel section 8 Collet chuck 9 Tool 11 Movement / oscillation body 12 Movement / oscillation body 13, 14 Bearing 15, 16 Piezoelectric transducer 17, 18 Bearing 19, 20 Piezoelectric transducer 21 Outer contour (circle) 21A Solid material cross section 21B Cavity 22 Outer contour (drop) 22A Solid material cross section 22B Cavity 22C Circular arc 22D Corner 23 Outer contour (circular segment) 23A Solid material cross section 23B Cavity 23C Circular chord 23D Circular arc 24 Outer contour (circular triangle) 24A Solid material cross section 24B Cavity 24C, 24D, 24E Corner 24F, 24G, 24 houtside 25 outer contour (standion) 25A solid material cross section 25B hollow 25C, 25D circular arc 25E, 25F straight portion 30 measuring device 31 transmission device 40 external unit 41 external transmission device 51 to 59 cross-sectional profile D 1, D 2 diameter d 1, d 2 thickness V 1, V 2 vertical vibration direction V 3, V 4 horizontal vibration directionReferences included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedDE 295 07 033 U1

[0009] EP 3 501 688 B1

[0010] DE 10 2015 013 646 A1

[0011] WO 2014 / 195057 A1

[0012] EP 3 539 717 B1 [0013, 0014]

Claims

Tool holder (1) for holding a tool (4) and for rotationally coupling the tool (4) to a rotary drive of a machine tool, wherein in an operating state the tool holder and the tool held therein rotate about a working axis (A) driven by the rotary drive, wherein the tool holder comprises: a) at least one flow channel (5) surrounded by a channel wall (3) for flowing a fluid cooling and / or lubricating medium (KS) through to the tool (4) in the operating state, b) at least one measuring device (30) for measuring at least one operating measured variable in the operating state, c) at least one wireless transmission device (31) for wirelessly transmitting measurement data or measurement signals of the measuring device (30), and c) an energy generator (11, 12, 15, 16, 19, 20) for independently supplying the at least one measuring device (30) and the at least one transmission device (31) with electrical energy, d), wherein the energy generator d1) comprises at least one moving body (11, 12) arranged in the flow channel (5) and in the operating state in the fluid cooling and / or lubricating medium (KS) flowing through, and further comprises d2) at least one electromechanical converter (15, 16, 19, 20) coupled to the moving body (11, 12) for converting a movement (V1, V2, V3, V4) of the at least one moving body (11, 12) generated by the flowing cooling and / or lubricating medium (KS) into electrical energy for the at least one measuring device (30) and the at least one communication device (31).Tool holder according to claim 1, in which the at least one movement body (11, 12) is a vibration body and / or is set into vibration by the flowing cooling and / or lubricating medium (KS), and / or in which the movement body (11, 12) is mounted or held on the duct wall (3) in bearing regions, in particular end regions, in particular in corresponding bearings (13 and 14 or 17 and 18), and can oscillate or move between the bearing regions or the bearings, wherein the bearing regions are preferably arranged at two mutually remote ends of the movement body and / or wherein preferably the bearing regions or the bearings (13 and 14 and 17 and 18) are preferably provided on mutually opposite wall regions on the duct wall (3).Tool holder according to claim 2, in which at least one electromechanical transducer (15, 16, 19, 20) is arranged in at least one or each bearing region or at least one or each bearing (13 and 14 or 17 and 18) of the movement body (11, 12) or is assigned to at least one or each bearing region or at least one or each bearing (13 and 14 or 17 and 18).Tool holder according to claim 2 or claim 3, wherein at least one electromechanical transducer is arranged on the movement body in a region between the bearing regions or the bearings.Tool holder according to one of the preceding claims, in which the at least one movement body is elongated or beam-shaped along a longitudinal direction, and preferably runs at least approximately linearly without flowing cooling and / or lubricating medium (KS) and / or preferably extends along the longitudinal direction between the bearing regions or bearings and / or has a length which corresponds to a diameter of the flow channel at this point with the movement body or its bearings.Tool holder according to claim 5, in which the or each movement body extends with its longitudinal direction transversely to the flow direction of the fluid cooling and / or lubricating medium (KS) and / or perpendicularly to the working axis (A), wherein preferably the working axis runs, in particular orthogonally, through the movement body, preferably centrally.Tool holder according to one of the preceding claims, in which at least two movement bodies are provided, which are preferably arranged one behind the other, as viewed axially with respect to the working axis (A), and / or the longitudinal direction or directions thereof are directed obliquely, in particular perpendicularly, to one another.Tool holder according to one of the preceding claims, in which a cross section of the movement body, preferably a cross section perpendicular to the longitudinal direction, has a shape of a circle, a drop, a circle segment, an arc triangle or else a standion.Tool holder according to one of the preceding claims, in which at least one electromechanical transducer comprises at least one piezoelectric transducer (15, 16, 19, 20) and / or at least one inductive transducer and / or at least one capacitive transducer, and / or in which in the at least one electromechanical transducer the movement or a deformation of the movement body caused by the movement is converted into electrical energy, in particular an electrical voltage or an electrical current.Tool holder according to one of the preceding claims, in which at least one movement body comprises a turbine or a blade wheel which is set into a rotational movement by the flowing cooling and / or lubricating medium and in which the electromechanical converter converts this rotational movement into electrical energy by electromagnetic induction, in particular in the manner of an alternating current generator or direct current generator.Tool holder according to one of the preceding claims, in which the at least one operating measured variable is selected from the group of measured variables comprising kinematic, in particular translatory and / or rotatory, measured variables such as location / position, speed, acceleration, force, rotational speed, torque, changes in length, unbalances or moments of inertia and temperature, pressure or flow rate or volume flow of the flowing medium in the flow channel.Tool holder according to one of the preceding claims, having at least one or any combination of the following features: a) the tool (4) is a thread-generating tool, in particular a tap, a thread groove or a thread milling cutter, or a drilling tool or a milling tool, b) the flow channel (5) runs at least partially coaxially with the working axis (A).

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