DE102021132211A1 - Device for a heat treatment - Google Patents

Abstract

The invention relates to a device (2) for heat treatment, in particular for inductive heating or cooling, of shrink fit chucks (4) for shank tools (6), in particular a shrink fit device (2) or a cooling device (2) or a shrink fit device with a cooling device ( 2), with a receiving device (8), in particular a receiving opening (8), for receiving a shrink chuck (4), a heat treatment unit (12), in particular an induction coil arrangement, surrounding the receiving device (8) with respect to a central axis (10), in particular concentrically (12) or a cooling unit (12) and a measuring unit (14) for measuring the temperature of the shrink chuck (4), in particular without contact that the measuring unit (14) has several temperature sensors (16) arranged around the recording device (8) or one around the central axis en temperature sensor (16') for, in particular non-contact, detection of a jacket temperature of a shrink chuck (4) arranged in the receiving device (8) or that the measuring unit (14) has several sensors (60) arranged around the receiving device (8), wherein at least a first of these is a temperature sensor (16) for detecting, in particular without contact, a jacket temperature of a shrink fit chuck (4) arranged in the receiving device (8) and at least a second of these is a different type of sensor (62) for detecting another property of the material in the receiving device (8) arranged shrink chuck (4).

Description

The invention relates to a device for heat treatment, in particular for inductive heating or cooling, of shrink fit chucks for shank tools, in particular a shrink fit device or a cooling device or a shrink fit device with a cooling device (for shrink fit chucks). The invention further relates to a method for operating such a device.

Such a device for a heat treatment of shrink chucks, in this case a shrink device is from DE 10 2012 216 186 A1 known. This shrinking device provides a sensory temperature measuring device, here a radiation/IR thermometer, which detects a jacket temperature or surface temperature of a shrinking chuck without contact and is positioned stationary at a distance from the shrinking device. To measure the temperature, however, an induction coil arrangement of the shrinking device must be moved out of the engagement width with the shrinking chuck so that the surface of the shrinking chuck can be scanned by the sensor. A temperature measurement during a heating process is therefore not possible.

Another such shrink device with an induction coil arrangement and a non-contact sensory temperature measuring device is intended to improve this DE 10 2018 121 883 A1 is known. In this shrinking device, it is provided that the induction coil arrangement is penetrated by a measuring channel, which opens into a receiving opening for receiving a shrinking chuck. The shrink device then provides that the non-contact sensory temperature measuring device has a temperature sensor, here also a radiation thermometer, for detecting the jacket temperature of the shrink chuck, which engages in this measuring channel.

These radiation thermometers used here in the state of the art mentioned (for non-contact temperature measurement in the shrink chucks) work on the basis of infrared radiation/thermal radiation emitted by the body (like the infrared radiation/thermal radiation emitted here by a shrink chuck).

Every body or object emits an amount of infrared radiation or heat radiation corresponding to its surface temperature (which is recorded and evaluated with a radiation thermometer). The intensity of the infrared radiation/heat radiation changes depending on the object temperature.

In addition, the intensity of the infrared radiation/heat radiation of "real bodies" is also dependent on the material or surface. That is, (real) bodies emit an intensity that is lower by a material/surface-dependent factor - than ideal heat radiators, i.e., ideal "black radiators". This factor is known as "Emissivity ε".

For non-contact temperature measurement, if you want to measure the temperatures of individual bodies exactly, you have to know the (individual) emissivity ε, i.e. the ability to radiate heat, of the respective body.

Exactly this proves to be disadvantageous in the known shrink devices with radiation thermometers used there, where the temperature is to be measured on (many different) real bodies, i.e. the shrink chucks - with emissivities ε that are unknown in practice.

Therefore, the radiation thermometer used is usually preset (or calibrated) to a specific emissivity ε. This means that the exact temperature measurement can only be carried out for a very specific body of a very specific material/surface (namely for the body whose material/surface has exactly the preset emissivity ε), which leads to measurement errors for all other bodies to be measured (or shrink chucks). - with other deviating emissivities ε - leads.

It is the object of the invention to improve the shrinking devices known in the state of the art, generally known devices for heat treatment of shrinking chucks, with regard to their temperature measurement on the shrinking chucks to be treated and (thereby) reliable heat treatment, in particular heating or cooling of shrinking chucks, - with a high level of safety and easy handling.

This object is achieved by a device for heat treatment, in particular for inductive heating or cooling, of shrink chucks and a method for operating such a device with the features of the respective independent claim.

Advantageous developments of the invention are the subject matter of dependent claims and the following description—and relate both to the device or devices and to the method.

Terms used, such as top, bottom, front, back, left or right - unless otherwise explicitly defined - are to ver stand. Terms such as radial and axial are to be understood with respect to a central axis of the device.

The term "substantially" - as far as it is used - can (according to the understanding of the highest court) be understood in such a way that it is used to refer to "a practically still significant extent". Possible deviations from the exact, implied by this terminology, can result without intention (i.e. without functional justification) due to manufacturing or assembly tolerances or similar.

The device for heat treatment, in particular for inductive heating or cooling, of shrink fit chucks for shank tools, in particular a shrink fit device or a cooling device or a shrink fit device with a cooling device (for shrink fit chucks), has a receiving device that forms a receiving area for a shrink fit chuck, in particular a Receiving opening, for receiving the shrink fit chuck, a heat treatment unit, in particular an induction coil arrangement or a cooling unit, enclosing the receiving device or the receiving area with respect to a central axis, in particular concentrically, and a measuring unit for measuring the temperature of the shrink fit chuck, in particular without contact.

Such a preferably non-contact temperature measuring unit can be, for example, a measuring unit which is based on (heat) radiation measurement of bodies. This means that such a temperature measuring unit, which preferably measures without contact, can have, for example, a radiation sensor, such as in the case of a pyrometer.

Furthermore, the device according to the invention provides that the measuring unit has several temperature sensors arranged around the receiving device or the receiving area - or at least one temperature sensor arranged around the receiving device or the receiving area and positioned obliquely with respect to the central axis for the, in particular non-contact, detection of a jacket temperature or surface temperature of a shrink chuck arranged in the receiving device/in the receiving area, for example a radiation sensor or radiation sensors or a pyrometer with a radiation sensor or pyrometer with radiation sensors.

In other words, it is expedient if the multiple temperature sensors and/or the inclined temperature sensor are designed as radiation detectors, in particular as pyrometers with a radiation detector for detecting thermal radiation from a shrink chuck arranged in the receiving device.

The at least one inclined temperature sensor can also be one of the several temperature sensors arranged around the receiving device or receiving area.

An angle of inclination of the inclined temperature sensor is preferably between 30° and 60°, in particular 45°.

By tilting the sensor, the surface can be better detected by an emissivity ε, especially in an area in which one wants to measure and/or monitor the surface temperature, for example in the range of 50° C.-70° C.

In addition, by tilting the temperature sensor, a larger detectable area that can be monitored by the temperature sensor can be realized.

In particular, it can also be expedient if at least one of the multiple temperature sensors and/or the inclined temperature sensor provides a focusing device and/or a shielding device, in particular a screen.

This or such a focusing device and/or shielding device can make the temperature sensor less sensitive to interfering radiation, e.g. from a device emitting thermal radiation arranged close to the temperature sensor, for example a shrink device. Additional shielding for the temperature sensor can thus be dispensed with if necessary.

Provision can then preferably also be made here for at least two, in particular many or even all, of these multiple temperature sensors to be used together for measuring the jacket temperature or surface temperature of a shrink chuck arranged in the receiving device/in the receiving area.

In particular, reference can mean that a resulting jacket temperature or surface temperature is determined using the at least two, in particular many or also all temperature sensors or their measurements/measured values. A first, simplest approach in this respect could be that a mean value from the at least two, in particular many or also all temperature sensors or their measurements/measured values is determined as the resulting jacket temperature. They can too individual temperature sensors or their measurements/measured values are weighted individually.

It can also be provided here that at least two, in particular many or even all, of the temperature sensors have different configurations/measurement settings.

“Different configurations/measurement settings” (for the temperature sensors) can in particular be understood to mean that the temperature sensors are calibrated differently, for example for/on different materials/surfaces of shrink chucks (or different emissivities ε). It can also mean that the temperature sensors have measuring ranges in different wavelength ranges (cf. quotient pyrometer).

Alternatively, the device according to the invention also provides for the measuring unit to have a plurality of sensors arranged around the receiving device or the receiving area, with at least a first one being a temperature sensor for detecting, in particular without contact, a jacket temperature of a shrink chuck arranged in the receiving device/in the receiving area is, for example a radiation sensor or a pyrometer with a radiation sensor (see above), and at least a second of these is a different type of sensor for detecting another property of the shrink chuck arranged in the receiving device/in the receiving area.

The at least one inclined sensor can also be this at least one first temperature sensor, which is combined with the at least one second different sensor.

The at least one first temperature sensor can also have a focusing device and/or a shielding device.

The at least one second different type of sensor can preferably be a distance sensor or reflection sensor, in particular measuring without contact, in particular an optical sensor or an ultrasonic sensor or a laser sensor or an infrared (reflection) sensor.

Distance sensors, also referred to as position sensors, displacement sensors, displacement pickups or distance sensors, measure a distance between the sensor and an object. The distance sensors can be used to measure quantities such as distance, distance, path and position. The change in the distance is converted by the sensor or by a sensor controller into an electrical signal which can be output to a control unit—possibly via various interfaces.

A reflective sensor is used to verify the presence or absence of an object by measuring the light reflection from the object.

The temperature measurement can be improved if several of the first temperature sensor and/or several of the second different type of sensor are arranged around the recording device/around the recording area. The several second sensors of a different type can also be different from one another, for example a distance sensor combined with a reflection sensor.

Furthermore, it can also be provided here that--in the case of several of the first temperature sensor--at least two, in particular many or even all, have different configurations/measurement settings from the first temperature sensor.

The signal from one and the same radiation sensor can - as an alternative to the case of several radiation sensors - be evaluated in different ways, e.g. B. on the basis of different emissivities ε instead of using several temperature sensors with different configurations/measurement settings.

Preferably, it can then also be provided that at least the at least one first temperature sensor and the at least one second different sensor, in particular - in the case of several of these - several, many or also all of this first temperature sensor and of this second different sensor for the jacket temperature - or surface temperature measurement of a shrink chuck arranged in the receiving device/in the receiving area.

In a further development, it can also be provided that the sensors are arranged in a circle (possibly in groups on different circles) to the central axis and/or at different axial heights to the central axis at or around (around) the receiving device/receiving area. This can be carried out with a uniform division - or with an uneven division.

Provision can also be made for each sensor to be fastened individually at its predetermined position, for example in or on the heat treatment unit—or on a housing of this unit—or for a common holding device, such as a holding device/the holding area, to be fixed at least partially enclosing ring-shaped unit (measuring ring) is provided, which or which receives the sensors - and which or which then in turn in the device or in or on the heat treatment unit / - housing is installed.

Preferably, the essentially ring-shaped structural unit or the measuring ring can be arranged coaxially to the central axis in the device, in particular axially adjacent to the heat treatment unit, in particular the induction coil arrangement or the cooling unit.

It can also be expedient if sensors of the same type are arranged adjacently in the essentially ring-shaped structural unit, for example “bundled” in (circular) sectors. For example, the temperature sensors can be arranged adjacent to one another in a circular sector of the essentially ring-shaped structural unit or measuring ring.

It can also be provided in a further development that the heat treatment unit has at least one or more interruptions, for example radial (measuring) channels that open into the receiving area formed by the receiving unit, or is interspersed with such.

In the case of an induction coil arrangement as a heat treatment unit, it can be particularly expedient if a coil winding of the induction coil arrangement is wound around the channels—while keeping the respective interruption or the respective channel free.

A sensor, such as a temperature sensor, can then be arranged or used in such a (measuring) channel or at least partially in such a measuring channel and/or on such a (measuring) channel - in such a way that it passes through the measuring channel through.

If the sensor is also arranged outside of a housing of the heat treatment unit, it is expedient if the housing provides a corresponding opening for the sensor (for measuring through the sensor).

In particular, it is expedient--in terms of metrology--if such a measuring channel runs essentially radially to the central axis through the heat treatment unit and/or its housing.

In a further development, it can also be provided that such a measuring channel is arranged in an axial central area of the induction coil arrangement, preferably approximately centrally between its axial ends.

Furthermore, it proves to be expedient if a protective window, in particular transparent to thermal radiation and preferably replaceable, is inserted in such a measuring channel, in particular to protect the sensor from contamination and/or damage.

In this regard, as an alternative or in addition to the wrapped (measuring) channels, it can also be provided that - in the case of an induction coil arrangement as the heat treatment unit - the induction coil arrangement has two or more spaced partial coils, in which case one or the sensors are arranged (and can measure through) according to the channel arrangement. The same can also be provided for a cooling unit with sub-units as a heat treatment unit.

Furthermore, the transmission of measured values from the temperature sensors can be wired or also wireless to an arithmetic and/or control unit.

It has proven to be expedient, in particular for non-contact temperature measurement, if the plurality of temperature sensors are each designed as non-contact measuring radiation detectors/sensors or as pyrometers with a radiation detector/sensor (for detecting thermal radiation from a shrink-fit chuck arranged in the receiving opening). .

A calculation unit for determining a or the resulting jacket temperature of a shrink fit chuck arranged in the receiving device/receiving area can preferably also be provided in the device, which is set up in such a way that the resulting jacket temperature can be determined using the sensors, in particular using several Temperature sensors recorded the jacket temperatures of the shrink chuck arranged in the receiving device.

It is also expedient if the device is designed with a control unit. This control unit can be used in particular to control the heat treatment unit, such as the induction coil arrangement or the cooling unit, for example in such a way that the control unit controls a power output of the heat treatment unit, for example a power supply to the induction coil arrangement, depending on the jacket temperature determined using the sensors.

Furthermore, it can also be expedient if the device has a display device for displaying a heat condition, in particular a tool holder arranged in the receiving device/in the receiving area, in particular a shrink-fit chuck. This can be color diodes, for example. Different colors can indicate different heat conditions.

Starting from the problem of different and unknown emissivities ε in a plurality of shrink fit chucks to be “temperature-measured”, the invention is based on the consideration that the influence of the emissivity ε (, which depends on the material and/or the surface of a respective shrink fit chuck, ) can be eliminated or calculated out (e.g. mathematically shortened) when using or when measuring temperature using multiple sensors, in particular multiple temperature sensors or different sensors - and so that the temperature measurement is independent of the respective emissivity ε or knowledge of which is no longer necessary.

With a single (radiation) sensor for temperature measurement, knowledge of the specific emissivity ε of the respective shrink chuck (for an exact temperature measurement/determination) would be necessary - and the (radiation) sensor would have to be set individually for this emissivity ε or The (radiation) sensor would have to be calibrated individually for the respective shrink chuck. This does not apply in the case of several temperature sensors according to the invention.

This knowledge is also based on an alternative device according to the invention - for heat treatment, in particular for inductive heating or cooling, of shrink fit chucks for shank tools, in particular a shrink fit device or a cooling device or a shrink fit device with a cooling device, with a receiving device forming a receiving area, in particular a receiving opening for receiving a shrink fit chuck, a heat treatment unit surrounding the receiving device with respect to a central axis, in particular concentrically, in particular an induction coil arrangement or a cooling unit, and a measuring unit for measuring the temperature of the shrink fit chuck, in particular without contact, which provides that the measuring unit has a Has ratio pyrometer.

Ratio pyrometers (also called two-color or ratio pyrometers) use two (radiation) detectors, both of which work at different - but usually close together - wavelengths and are aimed at the same target.

Ratio pyrometer because if you put two radiation densities of different wavelengths - measured on a body - into a quotient Q in the "ratio", then the emissivity ε is eliminated (i.e. you can shorten it) and only one expression remains dependent on the temperature left over. This dependency can be obtained, for example, from a blackbody calibration. Now you can measure temperatures without knowing the emissivity ε.

Preferably, the quotient pyrometer can also be designed with all the features described above, in particular insofar as they can be related to temperature sensors and/or can be combined with such features.

In particular, it can also be provided here that the heat treatment unit has a measuring channel—including all of the further developing features described above—in which or on which the quotient pyrometer is arranged—and through which the quotient pyrometer measures.

The essentially ring-shaped structural unit or measuring ring can also be equipped with the ratio pyrometer.

In the method for operating a device according to the invention, in particular for inductively heating a shrink-fit chuck or cooling a shrink-fit chuck, a resulting jacket temperature of a shrink-fit chuck arranged in the receiving opening or in the receiving area is then determined using the multiple sensors, in particular using of jacket temperatures of the shrink fit chuck arranged in the receiving opening/receiving area detected by the multiple temperature sensors.

This can happen, for example, in such a way that the temperature sensors have different configurations/measurement settings, such that they are calibrated differently, for example for/on different materials/surfaces of shrink chucks (or different emissivities ε), or that the temperature sensors have measuring ranges in different wavelength ranges (cf. quotient pyrometer), and then the resulting jacket temperature is determined from the measurements/values determined by the several temperature sensors.

In other words, it can be provided that with several temperature sensors different calibrations/settings, in particular different emissivities ε, are or will be set, and measurements of the multiple temperature sensors are compared and/or processed together and the resulting jacket temperature is determined therefrom.

Mathematically, it can prove particularly advantageous that—if the measurements of the multiple temperature sensors are compared—the emissivity ε can be eliminated.

This can also happen, for example, in such a way that a calibration/setting or setting is carried out for at least one temperature sensor using a measurement of the different second sensor or that the resultant jacket temperature, in particular from the measurements, is determined using a measurement of the different second sensor by several temperature sensors.

For example, this would be possible in particular in such a way that the surface (color) of the shrink chuck is determined by means of a reflection sensor, which is corrected with the measurement from a distance sensor. Depending on this, (a) presettings can then be made for the temperature sensor or for one temperature sensor and then measured with this or (b) the measurements for a plurality of preset temperature sensors can be processed accordingly.

However, it was also surprisingly observed that the emission behavior shows only slight differences within narrow temperature limits and in certain frequency ranges with different surface properties. This makes it possible to measure the temperature within these temperature limits with sufficient accuracy using a single suitable sensor, e.g.

The operation of the shrinking device can preferably consist of inductively heating a shrink chuck in the receiving device surrounded by a heat treatment device designed as an induction coil arrangement and thereby expanding it, and using the resulting jacket temperature to control the heating process. Or that a shrink chuck is cooled in the receiving device enclosed by a heat treatment device designed as a cooling unit and that the cooling process is controlled using the resulting jacket temperature.

This checking can be done, for example, by changing or adjusting and/or controlling a power supply to the heat treatment unit depending on the resulting jacket temperature.

The description given so far of advantageous configurations of the invention contains numerous features, some of which are combined into several in the individual subclaims. However, these features can expediently also be considered individually and combined to form further meaningful combinations.

Although some terms in the specification and claims are used in the singular or in conjunction with a numeral, the scope of the invention should not be limited to the singular or the respective numeral. Furthermore, the words "a" and "an" are not to be understood as numerals, but as indefinite articles.

The properties, features and advantages of the invention described above and the manner in which they are achieved will become clearer and more clearly understood in connection with the following description of the exemplary embodiments of the invention, which will be explained in more detail in connection with the drawing(s)/figures (same parts/components and functions have the same reference numbers in the drawings/figures).

The exemplary embodiments serve to explain the invention and do not limit the invention to the combinations of features specified therein, not even in relation to functional features. In addition, suitable features of each exemplary embodiment can also be explicitly considered in isolation, removed from one exemplary embodiment, introduced into another exemplary embodiment to supplement it and combined with any of the claims.

• 1 ein Schrumpfgerät mit einer mit mehreren berührungslos messenden Temperatursensoren bestückte Induktionsspulenanordnung gemäß einer Ausführung;
• 2 die Induktionsspulenanordnung des Schrumpfgeräts nach 1 in perspektivischer Darstellung;
• 3 einen Radialschnitt durch die Induktionsspulenanordnung des Schrumpfgeräts nach 1;
• 4 einen Axialschnitt durch die Induktionsspulenanordnung des Schrumpfgeräts nach 1;
• 5 ein Schrumpfgerät mit Kühlgerät und mit in das Kühlgerät integrierten Messring gemäß einer Ausführung in perspektivischer Darstellung;
• 6 das Schrumpfgerät mit Kühlgerät und mit dem in das Kühlgerät integrierten Messring nach 5 in Seitendarstellung;
• 7 der Messring des Schrumpfgeräts nach 5 in perspektivischer Darstellung;
• 8 eine schematische Darstellung der Funktionsweise des Messrings des Schrumpfgeräts nach 5;
• FIGen 9, 9b ein weiterer Messring in zwei Darstellungen.

Show it:

• 1 a shrinking device with an induction coil arrangement equipped with a plurality of non-contact measuring temperature sensors according to one embodiment;
• 2 the induction coil arrangement of the shrink device 1 in perspective view;
• 3 shows a radial section through the induction coil arrangement of the shrink device 1 ;
• 4 shows an axial section through the induction coil arrangement of the shrink device 1 ;
• 5 a perspective view of a shrinking device with a cooling device and with a measuring ring integrated into the cooling device;
• 6 the shrink device with cooling device and with the measuring ring integrated in the cooling device 5 in side view;
• 7 the measuring ring of the shrink device 5 in perspective view;
• 8th shows a schematic representation of how the measuring ring of the shrink device works 5 ;
• FIGS. 9, 9b show another measuring ring in two representations.

- Shrinking device with non-contact temperature measurement (FIGs 1 to 4)

1 shows a shrinking device 2 for shrinking in or out 120 shank tools 6 or (shown) a milling tool 6 in or out of a shrink chuck 4 with an induction coil arrangement 12 equipped with several non-contact temperature sensors 16.

FIGS. 2 to 4 show the induction coil arrangement 12 in various representations/sections in detail.

The shrink device 4 has how 1 shows, for the purpose of shrinking in and out 120, the induction coil arrangement 12 - which can be displaced along its coil axis 10 - for inductive heating 120 of the shrink-fit chuck 4 (cf. in particular FIGS. 2 to 4) and a (schematically illustrated) monitoring/control unit 28 for the process - Or heating control 160 at the shrink chuck 4.

That - in this case in 1 - Shrinkage chuck 4 comprises a cylindrical, hollow clamping area 34 as a sleeve part 32, which is accessible via a front opening 36 at the front end 38 of the shrinkage chuck 4 for inserting the tool or milling cutter shank 40.

The clamping area 34 of the shrink fit chuck 4 has a slightly smaller nominal diameter than the tool shank 40 so that it can be clamped in a manner known per se by (inductively) heating 120 of the shrink fit chuck 4 . In the shrunk-in state, the tool or milling cutter shank 40 is held in a non-rotatable manner in a frictionally engaged press fit in order to transmit a torque to the front working section 42 of the rotary tool 6 .

For shrinking, only the shrink chuck 4 is also heated on one side 120 until the thermal expansion releases the tool or milling cutter shank 40 for removal again.

The induction coil arrangement 12 encloses - as shown here in FIGS. 1 to 4 - concentrically around its coil axis 10 - a receiving opening 8 for the shrink fit chuck 4.

By axially displacing the induction coil arrangement 12 - along its coil axis 10 - the shrink chuck 4 - in relation to the induction coil arrangement 12 - is brought into the desired heating/heating position (cf. 1 ). For this purpose, stop elements, for example a pole disk, can also be provided on the induction coil arrangement.

In order to generate an electromagnetic alternating field, as can be seen in particular from FIGS. 1, 3 and 4, the induction coil arrangement 12 contains a coil winding 24 in a coil housing 18.

In order to be able to detect the jacket temperature of the shrink chuck 4 during heating 120 , the induction coil arrangement 12 is penetrated by several, in this case six, measuring channels 22 each opening into the receiving opening 8 radially with respect to the coil axis 10 .

The - six - measuring channels 22, as shown in FIGS. 3 and 4, - with approximately the same pitch around the coil axis 10 - at the same axial height with respect to the coil axis 10 in an axial central region 44 of the induction coil arrangement 12 - between its axial ends - arranged, the coil winding 24 being wound around the six measuring channels 22 while keeping them free. The coil-side inner section 46 of the respective measurement channel 22 is aligned with an opening 26 in the outer wall 48 of the induction coil housing 50 (also a total of six openings in the outer wall 48 of the induction coil housing 50).

In each of the - six - openings 26 of the induction coil housing 50, a non-contact measuring temperature sensor 16 is inserted, here a (non-contact) measuring thermal radiation radiation detector 16 or pyrometer 16, which passes through "its respective" measuring channel 22 in the coil winding 24 from the Shrink chuck 4 emitted thermal radiation detected.

The control unit 28 is coupled on the input side to the temperature sensors 16 by means of cables 52 - and thus contains their measurement signals, which are processed 140 in the control unit 28 together to form a resulting jacket/surface temperature of the shrink chuck 4 to be measured. This is done according to the first and simple approach, for example by averaging. If, for example, the resulting jacket/surface temperature of the shrink chuck to be measured exceeds a specified target temperature, the heating capacity of the induction coil arrangement is reduced 160.

• - auf Basis der ermittelten resultierenden Manteltemperatur - eine Temperaturkontrolle erfolgen, beispielsweise in der Form, dass - mittels einer Kontrolleinheit 28 - die Stromzufuhr zu der Induktionsspulenanordnung in Abhängigkeit von der resultierenden Manteltemperatur beeinflusst wird 160.

As a result, during the heating 120 of the shrink chuck 4

• - on the basis of the resulting jacket temperature determined - a temperature control is carried out, for example in the form that - by means of a control unit 28 - the power supply to the induction coil arrangement is influenced as a function of the resulting jacket temperature 160.

- Shrinkage device with non-contact temperature measurement using a quotient pyrometer (see FIGs 1 to 4)

FIGS. 1 to 4 also show—as a modification indicated by the reference number 30 (in brackets), “ratio pyrometer”—an alternative shrinking device 2 for shrinking in or out 120 shank tools 6 or (shown) a milling tool 6 in or .from a shrink chuck 4 - with in this modified case - an induction coil arrangement 12 equipped with a ratio pyrometer 30.

This version of the alternative shrink device differs from the previous version, as shown in FIGS. 1 to 4, in that instead of the six temperature sensors/radiation detectors 16 located in/on the six measuring channels 22 or measuring through them, there is a single ratio pyrometer 30 - arranged accordingly in/on one of the measuring channels 22 - is used. The resulting jacket/surface temperature results here solely from the measurement by the ratio pyrometer 30.

All previous statements on the shrinking device 2 are relevant here - and do not need to be repeated.

- Shrinking device with cooling device with non-contact temperature measurement (FIGs 5 to 8)

Figures 5 and 6 show a shrink device 2 with a cooling device 12, as in the EP 3 444 064 A1 is shown and described in detail (see FIGS. 1 and 4 and [0014] to [0026] of EP 3 444 064 A1 ), the content of which is hereby incorporated into this application (reference document).

As 5 (cf. also 4 the EP 3 444 064 A1 (reference document)) and 6 (cf. also 1 the EP 3 444 064 A1 (Reference document)), the cooling device 12 has a cooling head 72, which is guided in a displaceable manner on a frame or stand 70 and contains a cooling attachment 74 that can be placed at least on the part of the shrink chuck 4 to be cooled. The cooling attachment 74 contains a receiving opening 8 (cf. through-opening 6 in FIG EP 3 444 064 A1 ), the inner contour/diameter of which is matched to the outer contour/diameter of the part of the shrink chuck 4 to be cooled (not shown) (so that the cooling attachment 74 can be pushed/placed onto a shrink chuck 4 to be cooled).

For further details on the shrinking device 2 and its cooling device 12, refer to FIG EP 3 444 064 A1 referenced (see FIGS. 1 and 4 and [0014] to [0026] of EP 3 444 064 A1 ).

As FIGS. 5 and 6 also show, a measuring or sensor ring 56 (which is open over a specific circular ring sector) (cf. 7 (An alternative sensor ring is shown in FIGS. 9a and 9b)) integrated, by means of which--without contact--the jacket temperature of a shrink-fit chuck 4 accommodated in the cooling attachment 74 or its receiving opening 8 can be measured. It is integrated in such a way that the measuring ring 56 (cf. 7 ) - is arranged coaxially (with its central axis 58) to the central axis 10 of the cooling head 72 or cooling attachment 74.

The inner diameter of the measuring ring 56 is essentially the same as that of the cooling attachment 74 (at its lower end), as a result of which this becomes part of the receiving opening 8 .

7 shows the measuring ring 56 - in a "top" cut open state, which allows a look into a housing 76 of the measuring ring 56 - in detail.

As 7 clarified, the measuring ring 56 is an almost closed ring-shaped body - with two opposite ring legs 88, 90 at its open sector.

As 7 also shows, several different types of sensors 60, 16, 62, 96, 98 are accommodated in the measuring ring housing 76 forming the body of the measuring ring 56, namely three infrared temperature sensors 16 arranged next to one another - in a left leg 88 of the figuratively in 7 shown measuring ring 56, an ultrasonic distance sensor 60, 62, 96 comprising a transmitter 78 and a receiver 80, and a reflection sensor 60,62, 98 - in a right leg 90 of the pictorially in 7 shown measuring ring 56.

All of these sensors 60, 16, 62, 96, 98 are accommodated in an aligned manner—in the measuring ring 56 or in its housing 76—that their respective measuring direction is aligned radially with the central axis 58, 10. For this purpose, the measuring ring housing 76 also provides—radially inner—passages or openings 92—arranged on them—through which the sensors 60, 16, 62, 96, 98 can measure—radially inward.

In an embodiment--not shown--the sensors 60, 16, 62, 96, 98 can also be aligned essentially perpendicularly to the outer casing of the shrink chuck 4, which in many cases is conically shaped.

Sensors 60, 16, 62, 96, 98 are connected via lines (not shown) to a microcontroller 86 (calculation unit 66) also accommodated in measuring ring 56 or in its housing 76, so that measuring signals from sensors 60, 16, 62 , 96, 98 for processing, here in particular for determining a resulting jacket temperature of a shrink fit chuck 4 140 accommodated in the cooling attachment 74.

The microcontroller 86 for its part is connected via a supply line 84 to a control unit 68 or--in short to a controller 68--of the cooling device 12, to which it transmits its signals, such as the resulting jacket temperature. The controller 68 can then control 160 a cooling process 120 (in the case of a shrink chuck 4 accommodated in the cooling attachment 74) as a function of the currently determined jacket temperatures.

As 7 also shows, the measuring ring 56 has an LED (heat) status display 64 in the form of two colored LED light-emitting diodes 82, 94 which are arranged on the front sides of the two legs 88, 90 and are thus visible to a user, one of which is red 82 , the other is green 94 - and which - also connected to the controller 68 via the microcontroller 86 - are also controlled via the controller 68.

A - glowing - green LED light-emitting diode 94 indicates a heat condition of a shrink chuck 4, which has cooled down so much, for example, that it can be safely touched with bare hands; A glowing red LED 82 indicates a heat condition of a shrink chuck 4 that has not yet (sufficiently) cooled down. Red flashing of the red LED light-emitting diode 82 indicates an active cooling process by the cooling system 12 .

8th clarifies the mode of operation 100 or the interaction 200 of the various sensors 60, 16, 62, 96, 98 - during their measurements or when determining the jacket/surface temperature of a shrink chuck 4 140 to be cooled by cooling or accommodated in the cooling attachment 74 and control 160.

The measuring ring 56 or its sensors 60, 16, 62, 96, 98 (and LEDs 82, 94) are active or are switched to active (1) as soon as the cooling attachment 74 - with the integrated measuring ring 56 - is placed from above over the shrink chuck 4 to be cooled is moved downwards, (2) during the cooling process 120, in which the shrink chuck 4 is accommodated in the cooling attachment 74 (and (controlled via the controller 68 (note: the controller 68 sets the cooling parameters, such as a cooling duration, etc., optionally using the determined surface temperature or surface color of a shrink fit chuck 4))) and (3) until the cooling attachment 74 with integrated measuring ring 56 is completely - pushed up - lifted from the shrink fit chuck 4 (total, for example, "measuring phase"/ called "measuring cycle").

The start and end of the measurements or the measurement phase ((1) to (3)) can be determined (automatically) by means of the (ultrasonic) distance sensor 62, 96 or 78/80, which - by measuring the distance - recognizes whether a shrink chuck 4 is located in the measuring ring 56 220.

During the temperature measurement or temperature determination 140 (which is carried out by the microcontroller 86), the surface or the surface color of the determined in the measuring ring 56 recorded shrink chuck 4 (200). I.e. here specifically whether the shrink fit chuck 4 has a black surface or not.

On the basis of this information, those infrared temperature sensors 16 - from the three infrared temperature sensors 16 accommodated in the measuring ring 56 - are selected 180 for the temperature determination/calculation 140 which are on the present surface of the shrink chuck 4 (currently) accommodated in the measuring ring 56 ( "black"/"not black" or "silver", "white") are (pre-)set/calibrated (200).

In this case, with the measuring ring 56, a first of the three infrared temperature sensors 16 is on a black surface set/calibrated (“black temperature sensor”), whereas the other two infrared temperature sensors 16 are set/calibrated for non-black surfaces, for example silver and white (“non-black temperature sensors”).

If a “black” shrink chuck 4 is detected in the measuring ring 56 by means of the reflection sensor 62, 98, the temperature is determined 140 using the one “black” infrared temperature sensor 16; if a "non-black" shrink chuck 4 is detected in the measuring ring 56, the temperature is determined 140 using the other two "non-black" temperature sensors 16, for example by averaging the values of the two "non-black" temperature sensors 16, 16.

Based on the surface/casing temperatures determined in this way of a shrink chuck 4 located in the measuring ring 56, the control 160 of the cooling 120 is then carried out, as are the LED (heat) status display light-emitting diodes 82, 94 or 64 controlled 160.

In particular, the light-emitting diode control may be designed in such a way that (1) the cooling attachment 74 with the measuring ring 56 is first pushed over the (hot) shrink chuck 4 to be cooled, the red light-emitting diode 82 - glowing red - indicates the hot state of the shrink chuck 4 or its surface/mantle.

If the cooling attachment 74 is then pushed completely over the shrink chuck 4 - and the cooling process 120 is started (2), the red light-emitting diode 82 flashes - during the cooling process 120 - and indicates "cooling" 120.

When the cooling process 120 is complete - and the cooling attachment 74 is lifted upwards (3), then - if the shrink chuck 4 is still too hot - the red LED 82 lights up and - if the shrink chuck 4 has cooled down sufficiently - the green LED 94 lights up If the red light-emitting diode 82 indicates that the shrink-fit chuck 4 is still too hot, the cooling attachment 74 can be pushed back down over the shrink-fit chuck 4 - and a further cooling process 120 can be carried out.

If necessary, the entire cooling process 120 can also be coupled—automatically—to the temperature determination 140—and controlled 160 via it.

Furthermore, it would also be possible not only to make the selection of the (preset) infrared temperature sensors 16 on the basis of the reflection measurement (98), but rather to set one or more of the infrared temperature sensors 16 on the basis of a current reflection measurement (98) to perform. The infrared temperature sensor(s) 16 then (currently) set in this way can then be used to determine the temperature 140 of the jacket/surface temperature of the shrink chuck 4 . If necessary, a "correction" of the reflection measurement (98) by means of the distance sensor (96, 78, 80) can also be dispensed with.

In addition, reference is also made to the fact that a measuring ring 56 corresponding to the measuring ring 56 described above can also be arranged on an induction coil arrangement 12 of/of the shrinking device 2 in order to measure the jacket temperatures of shrinking chucks 4 accommodated in the receiving opening 8 of the induction coil arrangement 12 (cf 1 to 4). Correspondingly, a measuring ring 56 corresponding to the measuring ring 56 described above can also be arranged on separate cooling devices 12 that are independent or work alone.

FIGS. 9a and b show an alternative measuring ring 56 that can be integrated into the cooling attachment 74 (which can be used or is used in the same way in terms of its functioning). 9a this in an overall view and with 9b a detail of this in the "above" cut open state.

As 9a makes clear, this measuring ring 56 is also an almost closed ring-shaped body - with two opposite ring legs 88, 90 at its open sector.

As 9a (and 9b in detail) also shows, a single temperature sensor 60 is accommodated in the measuring ring housing 76 forming the body of the measuring ring 56, namely an infrared temperature sensor 16' - in a left leg 88 of the pictorially in 9a shown measuring ring 56.

Irrespective of this, holding devices other than the measuring ring 56 can also be provided for the temperature sensor 16′.

The temperature sensor 60 or 16' is equipped with an aperture 54.

Unlike the measuring ring 56 described above (according to 7 ) this temperature sensor 60 or 16 ′ is accommodated in the measuring ring housing 76 here—set at an angle α of approximately 45° to the central axis 10 .

The temperature sensor 60 or 16' is connected via lines (not shown) to a likewise in connected to measuring ring 56 or microcontroller 86 (calculation unit 66, not visible) accommodated in its housing 76, so that measurement signals from temperature sensor 60 or 16' can be processed by it, here in particular for determining the jacket temperature of a shrink-fit chuck 4 140 accommodated in cooling attachment 74 , are supplied.

The microcontroller 86 for its part is (not visible) connected via a supply line 84 to a control unit 68 or--in short to a controller 68--of the cooling device 12, to which it transmits its signals, such as the jacket temperature.

The controller 68 can then control 160 a cooling process 120 (in the case of a shrink chuck 4 accommodated in the cooling attachment 74) depending on the current jacket temperatures.

As 9a also shows, the measuring ring 56 has an LED (heat) status display 64 in the form of two colored LED light-emitting diodes 82, 94 which are arranged on the front sides of the two legs 88, 90 and are thus visible to a user, one of which is red 82 , the other is green 94 and which - also connected to the controller 68 via the microcontroller 86 - are also controlled via the controller 68.

A - glowing - green LED light-emitting diode 94 indicates a heat condition of a shrink chuck 4, which has cooled down so much, for example, that it can be safely touched with bare hands; A glowing red LED 82 indicates a heat condition of a shrink chuck 4 that has not yet (sufficiently) cooled down. Red flashing of the red LED light-emitting diode 82 indicates an active cooling process by the cooling system 12 .

Although the invention has been illustrated and described in detail by the preferred embodiments, the invention is not limited by the disclosed examples and other variations can be derived therefrom without departing from the scope of the invention.

Reference List

2

Device for heat treatment, shrinking device, cooling device, shrinking device with cooling device

4

shrink chuck

6

Shank/rotary tool, milling cutter/milling tool

8th

receiving device, receiving opening

10

Central axis, coil axis

12

heat treatment unit, induction coil assembly, cooling device/unit

14

unit of measure

16, 16'

Temperature sensor, pyrometer with radiation detector, radiation detector

18

(Coil) housing

20

interruptions

22

measurement channel

24

coil winding

26

breakthrough

28

control/control unit

30

ratio pyrometer

32

sleeve section

34

clamping range

36

forehead opening

38

front end

40

Tool shank, cutter shank

42

front working section

44

axial central area

46

coil-side inner section

48

outer wall

50

induction coil housing

52

Cable

54

focusing device, shielding device, diaphragm

56

(ring-shaped) unit, measuring/sensor ring

58

Central axis of the (annular) assembly/measuring ring

60

sensor

62

different second sensor, distance sensor, optical (distance) sensor, ultrasonic sensor, laser sensor, (infrared) reflection sensor,

64

Display device, (LED) (heat) status display

66

calculation unit

68

control, control unit

70

stand

72

cooling head

74

cooling attachment

76

(measuring ring) housing

78

Channel

80

recipient

82

(red) LED

84

supply line

86

microcontroller

88

(left) thigh

90

(right) thigh

92

passage, interruption

94

(green) LED

96

(Ultrasonic) distance sensor

98

reflection sensor

100

procedure

120

Heat treatment, heating, shrinking/shrinking, cooling

140

Determination of a resulting jacket/surface temperature

160

Control/control of heat treatment, control/control of heating/cooling, control/control of heating power or power supply

180

Carrying out a calibration/setting or an adjustment for at least one (first) temperature sensor (16) using the different second sensor (62), interaction of the at least one (first) temperature sensor (16) with the different second sensor (62)

200

Interaction of a first, different, second sensor (62) with a second, different, second sensor (62)

220

Recognition of a shrink chuck (4) received in the receiving device (8) using a different type of second sensor

QUOTES INCLUDED IN DESCRIPTION

This list of the documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 102012216186 A1 [0002]
• DE 102018121883 A1 [0003]
• EP 3444064 A1 [0095, 0096, 0097]

Claims (28)

Device (2) for heat treatment, in particular for inductive heating or cooling, of shrink fit chucks (4) for shank tools (6), in particular a shrink fit device (2) or a cooling device (2) or a shrink fit device with cooling device (2). a receiving device (8), in particular a receiving opening (8), for receiving a shrink chuck (4), a heat treatment unit (12), in particular an induction coil arrangement (12), surrounding the receiving device (8) with respect to a central axis (10), in particular concentrically, or a cooling unit (12), and a measuring unit (14) for measuring the temperature of the shrink chuck (4), in particular without contact, characterized in that the measuring unit (14) has a plurality of temperature sensors (16) arranged around the receiving device (8) for measuring the temperature, in particular without contact , detecting a jacket temperature of a shrink chuck (4) arranged in the receiving device (8) or that the measuring unit (14) for the has at least one temperature sensor (16') arranged around the receiving device (8) and inclined with respect to the central axis (10) for, in particular non-contact, detection of a jacket temperature of a shrink-fit chuck (4) arranged in the receiving device (8). Device (2) according to one of the preceding claims , characterized in that at least two, in particular several or all, of the temperature sensors (16) have different configurations/measurement settings. Device (2) according to one of the preceding claims , characterized in that the plurality of temperature sensors (16) each and/or the inclined temperature sensor (16') is used as a radiation detector, in particular as a pyrometer with a radiation detector for detecting thermal radiation from a ) arranged shrink chuck (4) are formed. Device (2) according to one of the preceding claims , characterized in that an angle of inclination of the inclined temperature sensor (16') is between 30° and 60°, in particular 45°. Device (2) according to one of the preceding claims , characterized in that at least one of the several temperature sensors (16) and/or the inclined temperature sensor (16') has a focusing device (54) and/or a shielding device (54), in particular a screen (54 ), provides. Device (2) for heat treatment, in particular for inductive heating or cooling, of shrink fit chucks (4) for shank tools (6), in particular a shrink fit device or a cooling device or a shrink fit device with a cooling device, with a receiving device (8), in particular a receiving opening (8), for accommodating a shrink chuck (4), a heat treatment unit (60), in particular an induction coil arrangement (12) or a cooling unit (62), enclosing the accommodating device (8) with respect to a central axis (10), in particular concentrically, and a measuring unit (14) for the, in particular non-contact, temperature measurement of the shrink chuck (4), characterized in that the measuring unit (14) has a plurality of sensors (60) arranged around the receiving device (8), at least a first of which is a temperature sensor (16) for , in particular non-contact, detection of a jacket temperature of a shrink chuck ( 4) and at least a second of which is a different type of sensor (62) for detecting a different property of the shrink-fit chuck (4) arranged in the receiving device (8). Device (2) according to the preceding claim , characterized in that the at least one second different type of sensor (62) is a distance sensor (62), in particular measuring without contact, in particular an optical sensor (62) or an ultrasonic sensor (62) or a laser sensor (62 ) or a reflection sensor (62), in particular an infrared reflection sensor (62). Device (2) according to one of the preceding claims , characterized in that the at least one first temperature sensor (16) is designed as a radiation detector, in particular as a pyrometer with a radiation detector for detecting thermal radiation from a shrink-fit chuck (4) arranged in the receiving device (8). . Device (2) according to one of the preceding claims , characterized in that several of the first temperature sensors (16) and/or several of the second different types of sensors (62) are arranged around the receiving device (8). Device (2) according to one of the preceding claims , characterized in that at least two, in particular several or all, of several of the first temperature sensor (16) have different configurations/measurement settings. Device (2) according to any one of the preceding claims , characterized in that the Sensors (16, 60, 62) are arranged in a circle and/or at different axial heights with respect to the central axis (10) at or around the receiving device (8). Device (2) according to one of the preceding claims , characterized in that the heat treatment unit (12) and/or a housing (18, 50) of the heat treatment unit (12) has at least one or more interruptions (20), in or on which or which one or one of the sensors (16, 60, 62) is arranged. Device (2) according to the preceding claim, characterized in that such an interruption (20) is designed as a measuring channel (22) which in particular extends essentially radially to the central axis (10) through the heat treatment unit (12) and/or through the housing ( 18, 50) of the heat treatment unit (12). Device (2) according to the preceding claim, characterized in that the one heat treatment unit (12) designed as an induction coil arrangement (12) has a coil winding (24) and/or induction coil cable arrangements wound while keeping the measuring channel (22) or measuring channels (22) free , between which or which the measuring channel (22) or the measuring channels (22) is/are formed. Device (2) according to one of Claims 13 until 14 , characterized in that at least one of the sensors (16, 60, 62) is at least partially arranged in or on such a measuring channel (22), in particular such that the at least one sensor (16, 60, 62) through such a measuring channel (22) through, in particular each of several or all of the sensors (16, 60, 62) is at least partially arranged in or on such a measuring channel (22), in particular in such a way that the sensor (16, 60, 62) measured through the measuring channel (22). Device (2) according to one of Claims 13 until 15 , characterized in that in such a measuring channel (22) a protective window, in particular transparent to heat radiation, preferably replaceable, is used, in particular to protect the sensor (16, 60, 62) from contamination and/or damage. Device (2) according to one of the preceding claims , characterized in that the sensors (16, 60, 62) are arranged in an essentially ring-shaped unit (56), in particular essentially in a circle around a central axis (58) of the essentially ring-shaped unit ( 56) and/or at a different or in particular at the same axial height in relation to the central axis (58) of the essentially ring-shaped structural unit (56). Device (2) according to the preceding claim , characterized in that the essentially ring-shaped structural unit (56) is coaxial with the central axis (10) in the device (2), in particular axially adjacent to the heat treatment unit (12), in particular the induction coil arrangement (12) or the cooling unit (12). Device (2) according to one of the two preceding claims , characterized in that sensors (16, 60, 62) of the same type are arranged adjacently in the essentially annular structural unit (56). Device (2) according to one of the preceding claims, characterized by a calculation unit (66) for determining a resulting jacket temperature of a shrink-fit chuck (4) arranged in the receiving device (8), which is set up in such a way that the resulting jacket temperature using the sensors (16 , 60, 62) can be determined (140), in particular using jacket temperatures of the shrink chuck (4) arranged in the receiving device (8), in particular a microcontroller (86), detected by a plurality of temperature sensors (16). Device (2) according to the preceding claim, characterized by a controller (68) of the heat treatment unit (12), in particular the induction coil arrangement (12) or the cooling unit (12), which is set up in such a way that a power of the heat treatment unit (12), in particular a power supply, in particular to a heat treatment unit (12) designed as an induction coil arrangement (12), can be controlled (160) as a function of the resulting jacket temperature. Device (2) according to one of the preceding claims, characterized by a display device (64) for displaying a heat condition, in particular in the receiving device (8) arranged tool holder (4), in particular a shrink chuck (4). Method (100) for operating a device (2) according to at least one of the preceding device claims, in particular for inductive heating (120) of a shrink chuck (4) or cooling of a shrink chuck (4), in a device (2) according to at least any of the preceding shrinking device claims, wherein a resulting jacket temperature of a shrink chuck (4) arranged in the receiving device (8) is determined (140) using the plurality of sensors (16, 60, 62), in particular using jacket temperatures of the in the receiving device ( 8) arranged shrink chuck (4). Method (100) according to one of the preceding method claims, characterized in that a shrink chuck (4) in the receiving device (8) surrounded by a heat treatment device (12) designed as an induction coil arrangement (12) is inductively heated (120) and thereby expanded and that under Using the resulting jacket temperature, the heating process is controlled (160) or that a shrink chuck (4) is cooled (120) in the receiving device (8) enclosed by a heat treatment device (12) designed as a cooling unit (12) and that the cooling process using the resulting jacket temperature is controlled (160). Method according to one of the preceding method claims, characterized in that different calibrations/settings, in particular different emissivities ε, are or will be set for a plurality of temperature sensors (16), and measurements of the plurality of temperature sensors (16) are compared and/or processed together and the resulting jacket temperature is determined (140). Method according to one of the preceding method claims, characterized in that a signal from one and the same radiation sensor (62) is evaluated in different ways. Method according to one of the preceding method claims, characterized in that using a measurement of the different second sensor (62) a calibration / setting or setting at least one temperature sensor (16) is carried out (180) or that using a measurement of the different second sensor (62) it is determined (180) how the resulting jacket temperature, in particular from the measurements from a plurality of temperature sensors (16), is determined (140). Device (2) for heat treatment, in particular for inductive heating or cooling, of shrink fit chucks (4) for shank tools (6), in particular a shrink fit device (2) or a cooling device (2) or a shrink fit device with cooling device (2). a receiving device (8), in particular a receiving opening (8), for receiving a shrink chuck (4), a heat treatment unit (12), in particular an induction coil arrangement (12), surrounding the receiving device (8) with respect to a central axis (10), in particular concentrically, or a cooling unit (12) and a measuring unit (14) for measuring the temperature of the shrink chuck (4), in particular without contact, characterized in that the measuring unit (14) has a quotient pyrometer (30).

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