Heat treatment equipment

Abstract

To provide a device for heat treatment.SOLUTION: The invention relates to a receiving device (8) for receiving a shrink chuck (4), in particular to a shrink fit device having a measuring unit (14) for non-contact temperature measurement of the shrink chuck (4). In order to measure a shell temperature of the shrink chuck (4) which is inserted as precisely as possible into the receiving opening (8), the measuring unit (14) has a plurality of temperature sensors (16) centered around the receiving device (8), or the measuring unit (14) has a plurality of sensors centered around the receiving device (8). At least the first sensor is specifically a temperature sensor (16) for non-contact detection of the shell temperature of the shrink chuck (4) arranged in the receiving device (8), and at least the second sensor is a different type of sensor for detection of another property of the shrink chuck (4) arranged in the receiving device (8).SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an apparatus for heat treatment of a shrink chuck for an axial tool, specifically an apparatus for induction heating or cooling, specifically a shrinking apparatus or a cooling apparatus or a shrinking apparatus provided with a cooling apparatus (for a shrink chuck). The present invention further relates to a method for operating such an apparatus.

Background Art

[0002] Such an apparatus for heat treatment of a shrink chuck, in this case a shrinking apparatus, is known from (Patent Document 1). The above-mentioned shrinking apparatus provides a sensor-type temperature measuring device, in this case a radiation / IR thermometer, which non-contactly detects the shell temperature or surface temperature of the shrink chuck and is positioned stationary at a distance from the shrinking apparatus. However, for temperature measurement, the induction coil structure of the shrinking apparatus has to be moved outside the range of engagement with the shrink chuck so that the surface of the shrink chuck can be sensed by the sensor. Therefore, temperature measurement cannot be performed during the heating operation.

[0003] It is required to achieve an improvement in this regard by means of a further such shrinking apparatus provided with a sensor-type temperature measuring device which performs non-contact detection as known from (Patent Document 2) and which has an induction coil structure. In the case of this shrinking apparatus, the measuring channel can extend through the induction coil structure, and the measuring channel opens into a receiving opening for receiving the shrink chuck. Further, the shrinking apparatus then provides a sensor-type temperature measuring device which performs non-contact detection and which has a temperature sensor, in this case also a radiation thermometer, for detecting the shell temperature of the shrink chuck engaging the above-mentioned measuring channel.

[0004] These radiation thermometers used here in the cited prior art (in the case of a shrink chuck for non-contact temperature measurement) operate based on infrared radiation / thermal radiation emitted by the body (here infrared radiation / thermal radiation emitted by the shrink chuck, etc.).

[0005] Every body or object emits a large amount of infrared or thermal radiation corresponding to its surface temperature (this radiation is detected and evaluated by a radiation thermometer). Here, the intensity of infrared / thermal radiation changes in a way that depends on the object's temperature.

[0006] However, the intensity of infrared / thermal radiation from the "real body" also depends on the material and surface. In other words, the (real) body emits radiation at an intensity lower than that of an ideal thermal radiation, i.e., an ideal "black radiator," by a material-dependent / surface-dependent coefficient. This coefficient is called the "emissivity ε."

[0007] Therefore, for non-contact temperature measurement, if you want to accurately measure the temperature of individual components, you need to know the emissivity ε of each component, that is, its thermal radiation capacity.

[0008] This is precisely where it is necessary to measure the temperature on a (many different) real body with an emissivity ε that is actually unknown, namely the shrink chuck, and in such a situation, it proves inconvenient to use a known shrinking device equipped with an infrared thermometer.

[0009] Therefore, generally, the radiation thermometer used is predetermined (or calibrated) to a specific emissivity ε. This means that accurate temperature measurements can only be performed on very specific bodies with very specific materials / surfaces (more specifically, bodies whose material / surface has exactly the predetermined emissivity ε), thereby introducing measurement errors if all other bodies (or shrink chucks) to be measured have different emissivity ε. [Prior art documents] [Patent Documents]

[0010] [Patent Document 1] German Patent Application Publication No. 102012216186A1 [Patent Document 2] German Patent Application Publication No. 102018121883A1 [Patent Document 3] European Patent Application Publication No. 3444064A1 [Overview of the project] [Problems that the invention aims to solve]

[0011] The object of the present invention is to improve upon prior art known shrinkage equipment or generally known equipment for heat treatment of shrink chucks for measuring the temperature on the shrink chuck for processing, thereby ensuring a reliable heat treatment that is safe, easy to handle, and specifically heating or cooling the shrink chuck. [Means for solving the problem]

[0012] The above objectives are achieved by heat treatment of shrink chucks, specifically by apparatus for induction heating or cooling, and by methods for operating such apparatus, each having the features of an independent claim.

[0013] A favorable improvement of the present invention is the subject matter of the dependent claims and the following description relating to both one or more apparatuses and methods.

[0014] Terms such as up, down, front, back, left, or right should be understood according to conventional understanding unless explicitly defined otherwise. Expressions such as radial and axial directions should be understood in relation to the central axis of the instrument.

[0015] When used, the expression “substantially” may be understood (according to the Supreme Court’s understanding) to mean “actually still to a considerable extent.” Therefore, possible deviations from the strictness implied by this term may occur unintentionally (i.e., without any functional criteria) due to manufacturing or assembly tolerances, etc.

[0016] For heat treatment of a shrink chuck for a shaft-type tool, specifically an apparatus for induction heating or cooling, specifically a shrink apparatus or cooling apparatus or a shrink apparatus equipped with a cooling apparatus (for a shrink chuck), having a receiving device which is a receiving opening and which forms a receiving area for the shrink chuck to receive the shrink chuck, specifically a heat treatment unit which is concentrically surrounding the receiving device or receiving area with respect to the central axis, specifically an induction coil structure or a cooling unit, and specifically a measuring unit for non-contact temperature measurement of the shrink chuck.

[0017] Such a temperature measuring unit preferably performs measurements non-contact and may be a measuring unit based on, for example, the measurement of (thermal) radiation from the main body. In other words, such a temperature measuring unit preferably performs measurements non-contact and may have, for example, a radiation sensor in the case of a pyrometer.

[0018] Furthermore, in the case of the apparatus according to the present invention, the measuring unit may have, for example, one or more radiation sensors, or a pyrometer equipped with one or more radiation sensors, in order to non-contact detect the shell temperature or surface temperature of a shrink chuck located within the receiving device / receiving area, which is located within the receiving device / receiving area and is tilted with respect to the central axis, and specifically within the receiving device / receiving area.

[0019] In other words, it is preferable that each of the multiple temperature sensors and / or gradient temperature sensors be configured as a pyrometer equipped with a radiation detector, specifically to detect thermal radiation from a shrink chuck placed inside the receiving device.

[0020] Here, at least one gradient temperature sensor may also be one of a plurality of temperature sensors arranged around the receiving device or receiving area.

[0021] The inclination angle of the inclination temperature sensor is preferably 30° to 60°, specifically 45°.

[0022] Due to the inclination of the sensor, specifically in an area where it is required to measure and / or monitor the surface temperature within a range of, for example, 50°C to 70°C, it becomes possible to detect the surface better depending on the emissivity ε.

[0023] Furthermore, due to the inclination of the temperature sensor, it becomes possible to realize a larger detectable area that can be monitored by the temperature sensor.

[0024] Specifically, it may also be convenient in some cases that at least one of a plurality of temperature sensors and / or inclination temperature sensors provides a focusing device and / or a shielding device, specifically a hole.

[0025] In this way, or by using such a focusing device and / or shielding device, the temperature sensor can be made non-responsive (less responsive) to interfering radiation from, for example, a temperature radiation emitter, such as a shrinkage device, disposed close to the temperature sensor. Thus, it may be possible to omit additional shielding for the temperature sensor.

[0026] Next, it may also be preferable here that at least two of the plurality of temperature sensors, specifically many or even all, are considered together for measuring the shell temperature or surface temperature of a shrink chuck disposed within a receiving device / receiving area.

[0027] "Consider" may specifically mean that the obtained shell temperature or surface temperature is confirmed using at least two temperature sensors, specifically many or even all of them, or their measurements / measurement values. By the first and most straightforward approach to this, the average value can be determined as the shell temperature obtained from at least two temperature sensors, specifically many or all of the temperature sensors, or their measurements / measurement values. Here, each individual temperature sensor or its measurement / measurement value can also be individually emphasized.

[0028] Thus, at least two, or more or even all, of the temperature sensors may have different configurations / measurement settings.

[0029] "Different configurations / measurement settings" (in the case of a temperature sensor) may be understood to specifically mean that the temperature sensor is calibrated differently for different materials / surfaces (or different emissivity ε) of, for example, a shrink chuck. This may also mean that the temperature sensor has a measurement range for different wavelength ranges (see quoscent pyrometer).

[0030] Alternatively, in the case of the apparatus according to the present invention, the measuring unit may also be provided having a plurality of sensors arranged around a receiving device or receiving area, where at least a first of the sensors is specifically a temperature sensor, e.g., a radiation sensor or a pyrometer equipped with a radiation sensor (see above) for non-contact detection of the shell temperature of the shrink chuck, which is located within the receiving device / receiving area, and at least a second of the sensors is a different type of sensor for detecting other characteristics of the shrink chuck, which is located within the receiving device / receiving area.

[0031] Here, at least one tilt sensor may also be the same at least one first temperature sensor as described above, but combined with at least one second sensor of a different type.

[0032] At least one first temperature sensor may also have a focusing device and / or a shielding device.

[0033] The at least one second sensor of a different type may preferably be a distance sensor or a reflective sensor that performs measurements non-contact, specifically an optical sensor, ultrasonic sensor, laser sensor, or infrared (reflective) sensor.

[0034] Distance sensors, also known as position sensors, travel sensors, travel transducers, or distance sensors, measure the distance between a sensor and an object. Distance sensors can be used to measure variables such as distance, travel, and position. Changes in distance are converted into electrical signals by the sensor or by a sensor control device, and these electrical signals can be output to a control unit via various interfaces of choice.

[0035] A reflection sensor is used to determine the presence or absence of an object by measuring the light reflection on the object.

[0036] Temperature measurement can be improved when several first temperature sensors and / or several second temperature sensors of different types are arranged around the receiving device / receiving area. Here, the multiple second sensors of different types may also be distance sensors of different types, such as reflective sensors.

[0037] Furthermore, in the case of several first temperature sensors, at least two, specifically many or even all, of the first temperature sensors may have different configurations / measurement settings.

[0038] Alternatively, in the case of multiple radiation sensors, signals from the exact same radiation sensor may be evaluated in different ways, for example, based on different emissivity ε, instead of using multiple temperature sensors with different configurations / measurement settings.

[0039] It is also preferable that at least one first temperature sensor and at least one second temperature sensor of a different type, specifically several of each of these, and more or even all of these first temperature sensors and several of these second sensors of different types, be used to measure the shell temperature or surface temperature of the shrink chuck located within the receiving device / receiving area.

[0040] In the improved version, the sensors may be arranged in or around the receiving device / receiving area in a circular shape with respect to the central axis (in groups on different circles, of an optional choice) and / or at different axial heights with respect to the central axis. This can be achieved with a uniform or non-uniform pitch.

[0041] Here, each sensor may be individually fastened to its predetermined location, for example, inside or on the heat treatment unit, or on its housing, or a common retaining device may be provided, for example, a ring-shaped structural unit (measuring ring) that at least partially surrounds the receiving device / receiving area, the structural unit or measuring ring receiving the sensor, which is then installed inside the device or inside or on the heat treatment unit / housing.

[0042] In this context, it is preferable that the substantially ring-shaped structural unit or measuring ring is positioned concentrically with respect to the central axis within the instrument, specifically adjacent in the axial direction to the heat treatment unit, specifically the induction coil structure or cooling unit.

[0043] It can also be advantageous when sensors of the same type are arranged adjacent to each other within a substantially ring-shaped structural unit, for example, "grouped" together in a (sectoral) section. For example, temperature sensors may be arranged adjacent to each other in one sectoral section of a substantially ring-shaped structural unit or measuring ring.

[0044] In one improved version, the heat treatment unit may have, or be able to expand through, at least one or more recesses, such as a receiving area formed by a receiving unit, and specifically radial (measuring) channels.

[0045] In the case of an induction coil structure as a heat treatment unit, it is sometimes advantageous for the coil winding of the induction coil structure to be wound around the channel such that each recess or channel remains open.

[0046] Sensors such as temperature sensors may then be positioned or inserted in such (measuring) channels or at least a portion of such measuring channels, and / or in such (measuring) channels, more specifically, through the measuring channels, to perform measurements.

[0047] If the sensor is also located outside the housing of the heat treatment unit, it is convenient that the housing provides a corresponding through-recess for the sensor (through which the sensor passes to perform the measurement).

[0048] Specifically, from a measurement standpoint, it is advantageous when such measurement channels run substantially radially with respect to the central axis passing through the heat treatment unit and / or its housing.

[0049] In improved versions, such measurement channels may be positioned within the axial central region of the induction coil structure, preferably approximately in the center between its axial ends.

[0050] Preferably, a replaceable protective window is specifically permeable to thermal radiation and has proven even more advantageous when inserted into such a measurement channel, specifically for the purpose of protecting the sensor from contamination and / or damage.

[0051] In this regard, as an alternative or addition to the wound (measuring) channel, in the case of an induction coil structure as a heat treatment unit, the induction coil structure may have multiple spaced subcoils, and then one or more sensors may be positioned in the spacing between the subcoils, corresponding to the channel arrangement (and through which measurements can be performed). The corresponding arrangement may also include subunits as a heat treatment unit in the case of a cooling unit.

[0052] Furthermore, the measured values ​​from the temperature sensor may be transmitted to the processing unit and / or control unit via wired or wireless connection.

[0053] Specifically for non-contact temperature measurement, it has been proven advantageous when each of the multiple temperature sensors is configured as a radiation detector / sensor that performs measurements non-contact, or as a pyrometer equipped with a radiation detector / sensor (to detect thermal radiation from a shrink chuck placed in a receiving aperture).

[0054] The apparatus may also preferably be provided with a processing unit for checking one of the shrink chucks located within the receiving device / receiving area or the resulting shell temperature, the processing unit being configured so that the resulting shell temperature can be checked using sensors on the shrink chuck located within the receiving device, specifically using shell temperatures detected by multiple temperature sensors.

[0055] It is also advantageous when the device is configured with a control unit. The control unit can be useful in controlling a heat treatment unit, such as an induction coil structure or a cooling unit, by controlling the power of a heat treatment unit, such as the current supply to an induction coil structure, in a manner that depends on the shell temperature confirmed using a sensor.

[0056] Furthermore, it may be advantageous for the device to have a display device for indicating the thermal state of the tool receptor, specifically located within the receiving device / receiving area of ​​the shrink chuck. These may be, for example, color diodes. Different colors can indicate different thermal states.

[0057] The present invention is based on the idea that, when the temperature of a large number of shrink chucks must be measured, the problem arises when the emissivity ε is different and unknown. By using multiple sensors, or by performing temperature measurements using multiple sensors, specifically multiple temperature sensors or different sensors, the influence of emissivity ε (which depends on the material and / or surface of each shrink chuck) can be eliminated or removed (e.g., mathematically canceled out), and therefore the temperature measurement can be performed independently of each emissivity ε, or its recognition is no longer necessary.

[0058] If there is a single (radiation) sensor for temperature measurement, it is necessary to know the specific emissivity ε of each shrink chuck (for accurate temperature measurement / determination), and the (radiation) sensor would have to be individually set for the above emissivity ε each time, or the (radiation) sensor would have to be individually calibrated for each shrink chuck. This is eliminated with multiple temperature sensors according to the present invention.

[0059] This recognition also incorporates alternative instruments according to the present invention for heat treatment of shrink chucks for shaft-type tools, specifically for induction heating or cooling, specifically shrink instruments or cooling instruments or shrink instruments equipped with cooling instruments, which have a receiving device that forms a receiving area for receiving a shrink chuck, specifically having a receiving opening, specifically having a heat treatment unit that concentrically surrounds the receiving device with respect to a central axis, specifically having an induction coil structure or a cooling unit, and specifically having a measuring unit for non-contact temperature measurement of the shrink chuck, the instrument providing a measuring unit having a quoscent pyrometer.

[0060] A quoscent pyrometer (also called a dichromatic pyrometer or ratio pyrometer) uses two (radiation) detectors that operate at different wavelengths but are usually closed together and directed towards the same target.

[0061] The term "ratio pyrometer" is used because two radiation densities of different wavelengths measured on the device are set in a "ratio" to form a quoscent Q, so that the emissivity ε is eliminated (i.e., can be canceled out), leaving only a temperature-dependent representation. This dependence can be obtained, for example, from calibration using a blackbody. The temperature can then be measured without knowing the emissivity ε.

[0062] The quoscent pyrometer may also preferably be configured to have all of the above features, specifically if the quoscent pyrometer may be related to a temperature sensor and / or can be combined with such features.

[0063] Specifically, the heat treatment unit may have a measurement channel that incorporates all of the above-mentioned improvement features, in which a quosient pyrometer is placed, and the quosient pyrometer performs the measurement through it.

[0064] A substantially ring-shaped structural unit or measuring ring may also be equipped with a quoscent pyrometer.

[0065] In order to operate the apparatus according to the present invention, specifically in a method for inducing heating or cooling of a shrink chuck, the resulting shell temperature of the shrink chuck placed in a receiving opening or receiving area is then confirmed using a plurality of temperature sensors of the shrink chuck placed in the receiving device / receiving area, specifically using the shell temperature detected by the plurality of temperature sensors.

[0066] This may be achieved, for example, by the benefit of temperature sensors having different configurations / measurement settings, for example, calibrated differently for different materials / surfaces (or different emissivity ε) of the shrink chuck, or by the benefit of temperature sensors having measurement ranges in different wavelength ranges (see Quascent pyrometer), and the resulting shell temperature is then determined from the confirmed measurements / values ​​from the multiple temperature sensors.

[0067] In other words, different calibrations / settings, specifically different emissivity values ​​ε, may be set for multiple temperature sensors, and measurements from these sensors may be compared and / or processed together to determine the resulting shell temperature.

[0068] Mathematically, we can specifically prove here the advantage that emissivity ε can be removed when the measurements of multiple temperature sensors are set to a certain ratio.

[0069] This may also be achieved, for example, by determining how the resulting shell temperature is determined, specifically from measurements from multiple temperature sensors, through the use of measurements from a second sensor of a different type, or by performing calibration / setting or adjustment in at least one temperature sensor using measurements from a second sensor of a different type.

[0070] For example, this should be made possible by the benefit that the surface (color) of the shrink chuck is corrected using measurements from a distance sensor and confirmed by reflectance measurements using a reflectance sensor. Then, using a method that relies on this, it is possible that (a) a preset is performed with that or one temperature sensor, and then measurements are performed using the temperature sensor, or (b) measurements from multiple preset temperature sensors are processed accordingly.

[0071] Surprisingly, however, it was also observed that, within temperature limits and within a specific frequency range, the radiation behavior exhibited only slight differences under different surface conditions. Thus, temperature can be measured with sufficient accuracy within these temperature limits using a single suitable sensor, such as a temperature sensor or pyrometer, specifically a single tilt sensor, that operates within a favorable frequency range independent of the surface conditions of the shrink chuck.

[0072] The operation of the shrinking device may consist of induction heating of a shrink chuck in a receiving device, which is surrounded by a heat treatment device preferably configured as an induction coil structure, causing the shrink chuck to expand, and the heating operation being controlled using the resulting shell temperature.

[0073] Alternatively, the shrink chuck within the receiving device is cooled by being surrounded by a heat treatment device configured as a cooling unit, and the cooling operation is controlled using the resulting shell temperature.

[0074] This control may be performed, for example, by modifying or adapting and / or controlling the current supplied to the heat treatment unit in a manner that depends on the resulting shell temperature.

[0075] The above-mentioned convenient improvements to the present invention include many features presented in some cases when collectively combined in individual dependent claims. However, it may also be advantageous to consider these features individually and in combination to form a more meaningful combination.

[0076] Some terms are used in this specification and / or in the claims in the singular form or in conjunction with a number, respectively, but the scope of the invention is not intended to be limited to the singular form or the respective number of the above terms. Furthermore, the words "a" or "an" should be understood as indefinite articles, not as numbers.

[0077] The above-described characteristics, features, and advantages of the present invention, as well as the methods for achieving them, will be made clearer and more clearly understood in conjunction with the following description of exemplary embodiments of the present invention, which will be discussed in more detail in conjunction with the drawings / figures (identical parts / components and functions are shown with the same reference designation in the drawings / figures).

[0078] The exemplary embodiments are helpful in describing the invention and do not limit the invention to combinations of features including the functional features expressed therein. Furthermore, for this purpose, suitable features of each exemplary embodiment may obviously be considered independently, taken from one exemplary embodiment, introduced into another exemplary embodiment to complement another exemplary embodiment, and combined with any claim. [Brief explanation of the drawing]

[0079] In the drawing: [Figure 1]One embodiment shows a shrinking device equipped with an induction coil structure that includes multiple temperature sensors for non-contact measurement. [Figure 2] The perspective view shows the induction coil structure of the contraction device as shown in Figure 1. [Figure 3] Figure 1 shows the radial portion passing through the induction coil structure of the shrinking device. [Figure 4] Figure 1 shows the axial portion of the shrinking device passing through the induction coil structure. [Figure 5] The perspective view shows a shrinkage device equipped with a cooling device according to one embodiment, and a measuring ring integrated into the cooling device. [Figure 6] Figure 5 shows a shrinkage device equipped with a cooling device, with a measuring ring integrated into the cooling device, as shown from one side. [Figure 7] In the perspective view, the measuring ring of the shrinkage device shown in Figure 5 is indicated. [Figure 8] Figure 5 is a schematic diagram illustrating the function of the measuring ring of the shrinking device. [Figure 9a] Further measurement rings are shown in the two figures. [Figure 9b] Further measurement rings are shown in the two figures. [Modes for carrying out the invention]

[0080] Shrinkage device with non-contact temperature measurement (Figures 1-4) Figure 1 shows a shrinking device 2 for shrinking a shaft-type tool 6 or a milling tool 6 (as shown) into or out of a shrinking chuck 4, having an induction coil structure 12 equipped with multiple temperature sensors 16 that perform measurements non-contact.

[0081] Figures 2 to 4 show the induction coil structure 12 in detail in different figures / parts.

[0082] As shown in Figure 1, for the purpose of shrink fitting or removal of the shrink base 120, the shrink device 2 has an induction coil structure 12 that is displaceable along its coil axis 10 and serves to induce heating 120 of the shrink chuck 4 (see Figures 2 to 4 specifically), and a control unit 28 (circumstantial example) for processing and controlling the heating 160 of the shrink chuck 4.

[0083] In this case, the shrink chuck 4 illustrated in Figure 1 includes a cylindrical hollow clamping region 34 as a sleeve portion 32, and the cylindrical hollow clamping region 34 is accessible through a surface opening 36 at the front end 38 of the shrink chuck 4 for inserting a tool or mirror shaft 40.

[0084] The clamping area 34 of the shrink chuck 4 has a nominal diameter slightly smaller than the tool shaft 40 so that the tool shaft can be fitted by clamping action in a known manner due to the (induction) heating 120 of the shrink chuck 4. In the shrink-fit state, the tool or mirror shaft 40 is rotated and coupled through a frictional interlock to transmit torque onto the front working portion 42 of the rotary tool 6.

[0085] The same applies to the removal of the shrink base, even if only the shrink chuck 4 is heated on one side 120 until it is released again to remove the tool or mirror shaft 40 due to thermal expansion.

[0086] Here, as shown in Figures 1 to 4, the induction coil structure 12 concentrically surrounds the receiving opening 8 for the shrink chuck 4 around its coil axis 10.

[0087] The axial displacement of the induction coil structure 12 along its coil axis 10 causes the shrink chuck 4 to be transported to a desired warming / heating position relative to the induction coil structure 12 (see Figure 1). For this purpose, it is also possible to provide a stopping element, such as a pole disk, on the induction coil structure.

[0088] As can be seen in detail from Figures 1, 3, and 4, the induction coil structure 12 includes a coil winding 24 within the coil housing 18 in order to generate an electromagnetic alternating magnetic field.

[0089] To enable detection of the shell temperature of the shrink chuck 4 during heating 120, multiple, in this case six, measuring channels 22 are provided, each opening into a receiving opening 8 and extending radially with respect to the coil axis 10 through the induction coil structure 12.

[0090] Here, the six measurement channels 22 are arranged within the axial central region 44 of the induction coil structure 12 at the same axial height relative to the coil axis 10, with a substantially uniform pitch between their axial ends and the coil axis 10, as shown in Figures 3 and 4, and the coil windings 24 are wound around the six measurement channels 22 so as to leave them unwound. The coil-side internal portion 46 of each measurement channel 22 is aligned with a recess 26 in the outer wall 48 of the induction coil housing 50 (and thus with a total of six recesses in the outer wall 48 of the induction coil housing 50).

[0091] One temperature sensor 16 is inserted into each of the six recesses 26 of the induction coil housing 50, and the temperature sensor 16 is a radiation detector 16 or pyrometer 16 which performs measurements non-contact, and the radiation detector 16 or pyrometer 16 measures thermal radiation (non-contact), and the temperature sensor detects the thermal radiation emitted by the shrink chuck 4 through "its respective" measurement channel 22 in the coil winding 24.

[0092] The control unit 28 is coupled to the temperature sensor 16 on the input side by cable 52 and thus receives a measurement signal from the temperature sensor, which is processed together within the control unit 28 to obtain the shell / surface temperature of the shrink chuck 4 to be measured. In a first simplified method, this is done, for example, by calculating an average value. For example, if the confirmed obtained shell / surface temperature of the shrink chuck to be measured exceeds a certain set temperature, the heating power of the induction coil structure is reduced.

[0093] In this method, during the heating 120 of the shrink chuck 4, temperature control can be performed based on the confirmed shell temperature, benefiting from the fact that, for example, the current supply to the induction coil structure is influenced 160 by the control unit 28 in a manner that depends on the obtained shell temperature.

[0094] Shrinkage device with non-contact temperature measurement function using a quoscent pyrometer (see Figures 1-4) Figures 1 to 4 show an induction coil structure 12 equipped with a quoscent pyrometer 30 as a modification indicated by reference designation 30 (in parentheses), “quoscent pyrometer,” and also show alternative shrinkage tools 2 for shrink fitting or removal of the shrink base 120 of an axial tool 6 or (as shown) a milling tool 6 in or out of the shrink chuck 4 in this modified form.

[0095] This embodiment of the alternative shrinkage device differs from the previous embodiment in that, instead of six temperature sensors / radiation detectors 16 seated in / in one of the six measurement channels 22 and performing measurements through them, a single quoscent pyrometer 30 is used, which is accordingly positioned in / in one of the measurement channels 22, as shown in Figures 1 to 4. Thus, the resulting shell / surface temperature is obtained here solely from measurements by the quoscent pyrometer 30.

[0096] All of the previous descriptions regarding contraction device 2 apply here as well, so there is no need to repeat them.

[0097] Shrinkage device equipped with a cooling device with non-contact temperature measurement function (Figures 5-8) Figures 5 and 6 show a shrinkage device 2 equipped with a cooling device 12 as provided and described in detail in Patent Document 3 (see Figures 1 and 4 of Patent Document 3, and sections

[0014] to

[0026] ), the details of which are incorporated into this application (as reference documents).

[0098] As shown in Figure 5 (see also Figure 4 in Patent Document 3) and Figure 6 (see also Figure 1 in Patent Document 3), the cooling device 12 has a cooling head 72 including at least one cooling mount 74 which is displaceably guided on a frame or stand 70 and can be mounted on a portion of the shrink chuck 4 to be cooled. The cooling mount 74 includes a receiving opening 8 (see passage opening 6 in Patent Document 3), and its inner contour / diameter is matched to the outer contour / diameter of that portion of the shrink chuck 4 (not shown) to be cooled (so that the cooling mount 74 can be pressed / mounted onto the shrink chuck 4 to be cooled).

[0099] For further details regarding the shrinking device 2 and its cooling device 12, please refer to Patent Document 3 (see Figures 1 and 4 and sections

[0014] to

[0026] of Patent Document 3).

[0100] As also shown in Figures 5 and 6, the measuring or sensing ring 56 (which opens over a specific circular ring portion) (see Figure 7 (an alternative sensing ring is shown in Figures 9a and 9b)) is integrated with the cooling fixture 74, and the measuring or sensing ring allows the shell temperature of the shrink chuck 4 received by the cooling fixture 74 or its receiving opening 8 to be measured non-contact. The integration is such that, at the lower edge of the cooling fixture 74, the measuring ring 56 (see Figure 7) is positioned coaxially with the central axis 10 of the cooling head 72 or the cooling fixture 74 (with its central axis 58).

[0101] Here, the inner diameter of the measuring ring 56 is substantially equal to the inner diameter of the cooling fixture 74 (at its lower end), and thus the measuring ring is part of the receiving opening 8.

[0102] Figure 7 shows the measuring ring 56 in detail with it cut open "at the top," allowing a view inside the housing 76 of the measuring ring 56.

[0103] As illustrated in Figure 7, the measuring ring 56 has a nearly closed ring-shaped body and is equipped with two ring protrusions 88 and 90 positioned opposite each other at its opening.

[0104] As shown in Figure 7, within the measuring ring housing 76 that forms the main body of the measuring ring 56, there are several received sensors 60, 16, 62, 96, and 98 of different types, specifically three adjacent infrared temperature sensors 16 located within the left-hand projection 88 of the measuring ring 56, as illustrated in Figure 7, ultrasonic distance sensors 60, 62, and 96 including a transmitter 78 and a receiver 80, and reflection sensors 60, 62, and 98 located within the right-hand projection 90 of the measuring ring 56, as illustrated in Figure 7.

[0105] All of these sensors 60, 16, 62, 96, and 98 are received within the measuring ring 56 or its housing 76 such that their respective measurement directions are radially oriented toward the central axes 58 and 10. For this purpose, the measuring ring housing 76 also provides a radial internal passage or opening 92 through which the sensors 60, 16, 62, 96, and 98 are positioned and through which the sensors can perform measurements radially inward.

[0106] In embodiments not shown, sensors 60, 16, 62, 96, and 98 may also be oriented substantially perpendicular to the outer shell of the shrink chuck 4, which is often conical in shape.

[0107] Through a line (not shown), sensors 60, 16, 62, 96, and 98 are connected to a microcontroller 86 (processing unit 66) received in the measuring ring 56 or its housing 76, so that the measurement signals from sensors 60, 16, 62, 96, and 98 are supplied to the microcontroller for processing, in this case specifically for confirming the obtained shell temperature of the shrink chuck 4 received in the cooling fixture 74.

[0108] The microcontroller 86 is then connected via the supply line 84 to the control unit 68 of the cooling device 12, or simply the control unit 68, and the microcontroller transmits its signals, such as the obtained shell temperature, to the control unit 68. The control unit 68 can then control the cooling operation 120 (of the shrink chuck 4 received in the cooling fixture 74) in a manner that depends on the now confirmed shell temperature.

[0109] As also shown in Figure 7, the measuring ring 56 provides an LED (thermal) status indicator 64 in the form of two-color LEDs (light-emitting diodes) 82 and 94, which are positioned on the sides of two protrusions 88 and 90 and are therefore visible to the user, one of which is red 82 and the other is green 94, and are also connected to and controlled by the control device 68 via a microcontroller 86.

[0110] The illuminated green LED (light-emitting diode) 94 indicates the thermal state of the shrink chuck 4, which has cooled to a temperature where it can be safely touched with bare hands, for example. The illuminated red LED (light-emitting diode) 82 indicates the thermal state of the shrink chuck 4, which has not yet cooled sufficiently. The flashing red LED (light-emitting diode) 82 indicates that the cooling operation is activated by the cooling arrangement 12.

[0111] Figure 8 shows the functions 100 or interactions 200 and control 160 of the various sensors 60, 16, 62, 96, 98 during measurements performed by the various sensors 60, 16, 62, 96, 98, or during verification 140 of the shell / surface temperature of the shrink chuck 4 which is to be cooled by cooling or received in a cooling fixture 74.

[0112] The measuring ring 56 or its sensors 60, 16, 62, 96, 98 (and light-emitting diodes 82, 94) are activated or switched to an activated state as soon as (1) the cooling fixture 74 with the integrated measuring ring 56 moves from top to bottom over the shrink chuck 4 to be cooled, (2) the shrink chuck 4 is received into the cooling fixture 74 (and cooled in a manner controlled by the control device 68 (Note: The control device 68 optionally sets cooling parameters such as cooling time and other cooling parameters using the confirmed surface temperature or surface color of the shrink chuck 4)) during the cooling operation 120, and (3) the cooling fixture 74 with the integrated measuring ring 56 is lifted from the shrink chuck 4 and pushed upward from the shrink chuck 4 (collectively referred to, for example, as a "measuring phase" / "measuring cycle").

[0113] The start and end of a measurement or measurement stage ((1) to (3)) may be (automatically) confirmed by (ultrasonic) distance sensors 62, 96 or 78 / 80 which detect 220 whether the shrink chuck 4 is set in the measuring ring 56 by distance measurement.

[0114] During temperature measurement or temperature confirmation 140 (performed by the microcontroller 86), the surface or surface color of the shrink chuck 4 received in the measuring ring 56 is then confirmed by the reflection sensors 62, 98 (200) using the distance values ​​confirmed by the distance sensors 62, 96, 78, 80. In this case, more specifically, it is whether the shrink chuck 4 has a black surface.

[0115] Based on this information, of the three infrared temperature sensors 16 received in the measuring ring 56, the infrared temperature sensor 16 that is currently set / calibrated to the current surface ("black" / "other than black" or "silver" or "white") of the shrink chuck 4 received in the measuring ring 56 is selected 180 for temperature verification / calculation 140.

[0116] In this case, for the measuring ring 56, the first set of three infrared temperature sensors 16 are set / calibrated on a black surface ("black temperature sensor"), while the other two infrared temperature sensors 16 are set / calibrated on a non-black surface, such as silver and white ("non-black temperature sensor").

[0117] If a "black" shrink chuck 4 is detected within the measuring ring 56 by the reflective sensors 62, 98, temperature verification 140 is performed using a single "black" infrared temperature sensor 16; if a "non-black" shrink chuck 4 is detected within the measuring ring 56, temperature verification 140 is performed using two other "non-black" temperature sensors 16, for example, by calculating the average value from the values ​​of two "non-black" temperature sensors 16, 16'.

[0118] Next, the cooling control 160 is performed based on the thus determined surface / shell temperature of the shrink chuck 4 positioned within the measuring ring 56, and the LED (thermal) status indicator light-emitting diodes 82, 94 and 64 are activated 160 according to the determined surface / shell temperature.

[0119] In detail, the light-emitting diodes can be controlled such that (1) when the cooling fixture 74 is pressed by the measuring ring 56 onto the (hot) shrink chuck 4 which is to be cooled first, the red light-emitting diode 82, which lights up red, indicates the hot state of the shrink chuck 4 or its surface / shell.

[0120] Next, when the cooling fixture 74 is fully pressed onto the shrink chuck 4 and the cooling operation 120 begins (2), the red light-emitting diode 82 flashes during the cooling operation 120 to indicate "cooling" 120.

[0121] When the cooling operation 120 is completed and the cooling fixture 74 is raised (3), the red light-emitting diode 82 lights up if the shrink chuck 4 is still too hot, and the green light-emitting diode 94 lights up if the shrink chuck 4 has cooled sufficiently. If the red light-emitting diode 82 is lit, indicating that the shrink chuck 4 is still too hot, the cooling fixture 74 can be pushed onto the shrink chuck 4 again to perform a further cooling operation 120.

[0122] Optionally, the entire cooling operation 120 can be automatically coupled to the temperature check 140 and controlled by it 160.

[0123] Furthermore, not only is the selection of the (pre-configured) infrared temperature sensor 16 based on the reflectance measurement (98), but the configuration of one or more infrared temperature sensors 16 can also be performed based on the current reflectance measurement (98). Then, one or more infrared temperature sensors 16 configured in this manner can be used for temperature verification 140 of the shell / surface temperature of the shrink chuck 4. Optionally, the "correction" of the reflectance measurement (98) by the distance sensors (96, 78, 80) can be omitted.

[0124] Additionally, it has been noted that a measuring ring 56 corresponding to the measuring ring 56 described above may also be placed in the induction coil structure 12 of one / its shrinking device 2 in order to measure the shell temperature of the shrink chuck 4 placed in the receiving opening 8 of the induction coil structure 12 (see Figures 1 to 4). Accordingly, a measuring ring 56 corresponding to the measuring ring 56 described above may also be placed in a separate cooling device 12 that operates independently or individually.

[0125] Figures 9a and 9b show an alternative measuring ring 56 that can be integrated with the cooling fixture 74 (the alternative measuring ring 56 can be used or used in the same manner for its function), with Figure 9a showing the measuring ring overall and Figure 9b showing the measuring ring in a cut-out state "at the top".

[0126] As shown in Figure 9a, the measuring ring 56 is a nearly closed ring-shaped body and has two ring protrusions 88 and 90 positioned opposite each other at its opening.

[0127] As shown in Figure 9a (and in detail in Figure 9b), a single temperature sensor 60, more specifically an infrared temperature sensor 16' located in the left-hand projection 88 of the measuring ring 56 as illustrated in Figure 9a, is received within the measuring ring housing 76 that forms the main body of the measuring ring 56.

[0128] Regardless of this, it is also possible to provide a holding device other than the measuring ring 56 on the temperature sensor 16'.

[0129] The temperature sensor 60 or 16' is provided with a hole 54.

[0130] In contrast to the measuring ring 56 described above (according to Figure 7), this temperature sensor 60 or 16' is received within the measuring ring housing 76 so as to be tilted at an angle α of approximately 45° with respect to the central axis 10.

[0131] Through a line (not shown), the temperature sensor 60 or 16' is connected to a microcontroller 86 (processing unit 66, not shown) which is also received in the measuring ring 56 or its housing 76, so that the measurement signal from the temperature sensor 60 or 16' is supplied to the microcontroller for processing, in this case specifically for the purpose of checking (140) the shell temperature of the shrink chuck 4 received in the cooling fixture 74.

[0132] The microcontroller 86 is then connected (invisibly) to the control unit 68, or simply the control device 68, of the cooling device 12 via the supply line 84, and the microcontroller transmits its signals, such as the shell temperature, to the control device 68.

[0133] The control device 68 can then control the cooling operation 120 (of the shrink chuck 4 received in the cooling fixture 74) in a manner that depends on the current shell temperature.

[0134] As also shown in Figure 9a, the measuring ring 56 provides an LED (thermal) status indicator 64 in the form of two-color LEDs (light-emitting diodes) 82 and 94, which are positioned on the sides of two protrusions 88 and 90 and are therefore visible to the user, one of which is red 82 and the other is green 94, and are also connected to the control unit 68 via a microcontroller 86 and controlled by the control unit 68.

[0135] The illuminated green LED (light-emitting diode) 94 indicates the thermal state of the shrink chuck 4, which has cooled to a temperature where it can be safely touched with bare hands, for example. The illuminated red LED (light-emitting diode) 82 indicates the thermal state of the shrink chuck 4, which has not yet cooled sufficiently. The red blinking of the red LED (light-emitting diode) 82 indicates that the cooling operation by the cooling arrangement 12 is activated.

[0136] While the present invention is illustrated and described in more detail by preferred exemplary embodiments, the present invention is not limited by the disclosed examples, and other modifications may be derived therefrom without departing from the scope of protection of the present invention. [Explanation of Symbols]

[0137] List of references: 2 Heat treatment equipment, shrinkage equipment, cooling equipment, shrinkage equipment equipped with cooling equipment 4 Shrink Chuck 6-axis / rotation tool, mirror / milling tool 8. Receiving device, receiving opening 10. Central axis, coil axis 12 Heat treatment units, induction coil structures, cooling devices / units 14 Measurement Units 16, 16' Pyrometer with temperature sensor and radiation detector, radiation detector 18 (coil) housing 20 recesses 22 measurement channels 24 Coil windings 26 Through recess 28 Control Unit 30 Quascient pyrometer 32 Sleeve portion 34 Clamping area 36-sided opening 38 Front edge 40 Tool shafts, mirror shafts 42 Front operating part 44 Axial center area 46. ​​Internal part of the coil side 48 Exterior Wall 50 Induction coil housing 52 Cables 54 Focusing device, shielding device, hole 56 (ring-shaped) structural unit, measurement / sensing 58 (Annular) Structure Unit / Central Axis of Measuring Ring 60 sensors 62 different types of second sensors, distance sensors, optical (distance) sensors, ultrasonic sensors, laser sensors, (infrared) reflection sensors 64 Display device, (LED) (thermal) status indicator 66 Processing Units 68 Control devices, control units 70 Stands 72 Cooling Head 74 Cooling mounting bracket 76 (measuring ring) housing 78 Transmitter 80 Receiver 82 (Red) Light-Emitting Diode 84 supply lines 86 Microcontroller 88 (Left) Protrusion 90 (Right) Protrusion 92 Passageway, recess 94 (Green) Light-Emitting Diode 96 (Ultrasonic) Distance Sensor 98 Reflection Sensor 100 ways 120 Heat treatment, heating, shrinkage base insertion / removal, cooling 140 Confirmation of the obtained shell / surface temperature 160 Control of heat treatment, control of heating / cooling, control of heating power or current supply 180 Performing calibration / setting or adjustment in at least one (first) temperature sensor (16) using a second sensor (62) of a different type; interaction of at least one (first) temperature sensor (16) with a second sensor (62) of a different type. 200 Interaction of a first second sensor (62) of a different type with a second second sensor (62) of a different type 220 Detection of shrink chucks (4) received into receiving device (8) using a second sensor of a different type.

Claims

1. A receiving device (8) for receiving the shrink chuck (4), A heat treatment unit (12) concentrically surrounds the receiving device (8) with respect to the central axis (10), An apparatus (2) for heat treatment of a shrink chuck (4) for a shaft-type tool (6), comprising a measuring unit (14) for non-contact temperature measurement of the shrink chuck (4), The measurement unit (14) is arranged around the receiving device (8) and has a plurality of temperature sensors (16) that are useful for non-contact detection of the shell temperature of the shrink chuck (4) located inside the receiving device (8). At least two of the temperature sensors (16) have different configurations / measurement settings, the device (2).

2. The apparatus (2) according to claim 1, wherein the plurality of temperature sensors (16) are configured as radiation detectors.

3. The apparatus (2) according to claim 1 or 2, wherein the plurality of temperature sensors (16) provide a focus adjustment device (54) and / or a shielding device (54).

4. A receiving device (8) for receiving the shrink chuck (4), A heat treatment unit (60) concentrically surrounds the receiving device (8) with respect to the central axis (10), An apparatus (2) for heat treatment of a shrink chuck (4) for a shaft-type tool (6), comprising a measuring unit (14) for detecting the characteristics of the shrink chuck (4), The measuring unit (14) has a plurality of sensors (60) arranged around the receiving device (8), at least the first of the sensors being temperature sensors (16) for non-contact detection of the shell temperature of the shrink chuck (4) located inside the receiving device (8), and at least the second of the sensors being different types of sensors (62) for detecting other characteristics of the shrink chuck (4) located inside the receiving device (8), the device (2).

5. The apparatus (2) according to claim 4, wherein the at least one second sensor (62) of a different type is a non-contact measuring distance sensor (62), an optical sensor (62), an ultrasonic sensor (62), a laser sensor (62), a reflective sensor (62), or an infrared reflective sensor (62).

6. The apparatus (2) according to claim 4 or 5, wherein the at least one first temperature sensor (16) is configured as a radiation detector.

7. The apparatus (2) according to any one of claims 4 to 6, wherein several of the first temperature sensors (16) and / or several of the second sensors (62) of different types are arranged around the receiving device (8).

8. The apparatus (2) according to any one of claims 4 to 7, wherein at least two of the first temperature sensors (16) have different configurations / measurement settings.

9. The apparatus (2) according to any one of claims 1 to 8, wherein the sensors (16, 60, 62) are arranged on or around the receiving device (8) at heights concentric with respect to the central axis (10) and / or in different axial directions.

10. The apparatus (2) according to any one of claims 1 to 9, wherein the heat treatment unit (12) and / or the housing (18, 50) of the heat treatment unit (12) has at least one or more recesses (20), and one or each of the sensors (16, 60, 62) is located in or in the recesses (20).

11. The apparatus (2) according to claim 10, wherein such recess (20) is configured as a measuring channel (22) that runs substantially radially with respect to the central axis (10) through the heat treatment unit (12) and / or through the housing (18, 50) of the heat treatment unit (12).

12. The apparatus (2) according to claim 11, wherein the heat treatment unit (12), configured as an induction coil structure (12), has a wound coil winding (24) such that the one or more measuring channels (22) are left open, and / or the one or more measuring channels (22) are formed between the windings of the induction coil structure.

13. The apparatus (2) according to any one of claims 11 or 12, wherein at least one of the sensors (16, 60, 62) is located in or within such measuring channel (22).

14. The apparatus (2) according to any one of claims 11 to 13, wherein one protective window is inserted into such a measuring channel (22).

15. The apparatus (2) according to any one of claims 1 to 14, wherein the sensors (16, 60, 62) are arranged concentrically and / or at different axial heights with respect to the central axis (58) of the substantially ring-shaped structural unit (56).

16. The apparatus (2) according to claim 15, wherein the substantially ring-shaped structural unit (56) is arranged coaxially with respect to the central axis (10) within the apparatus (2).

17. The apparatus (2) according to claim 15 or 16, wherein, of the sensors (16, 60, 62), sensors of the same type are arranged adjacent to each other within the substantially ring-shaped structural unit (56).

18. Apparatus (2) according to any one of claims 1 to 17, comprising a processing unit (66) for confirming the shell temperature obtained from a shrink chuck (4) placed in the receiving device (8), wherein the processing unit is configured so that the obtained shell temperature can be confirmed using the sensors (16, 60, 62).

19. The apparatus (2) according to claim 18, wherein the control device (68) for the heat treatment unit (12) is configured such that the power of the heat treatment unit (12) is controlled (160) in a manner that depends on the obtained shell temperature.

20. The apparatus (2) according to any one of claims 1 to 19, characterized by a display device (64) for displaying the thermal state of a tool receiver (4) disposed within the receiving device (8).

21. A method (100) for operating an apparatus (2) according to at least one of claims 1 to 20, The shell temperature obtained by the shrink chuck (4) placed in the receiving device (8) is confirmed using the plurality of sensors (16, 60, 62), method (100).

22. The shrink chuck (4) in the receiving device (8), surrounded by a heat treatment device (12) configured as an induction coil structure (12), is induction heated (120) and subsequently expanded, and the heating operation is controlled (160) using the resulting shell temperature, or The shrink chuck (4) in the receiving device (8), surrounded by a heat treatment device (12) configured as a cooling unit (12), is cooled (120), and the cooling operation is controlled (160) using the resulting shell temperature, according to claim 21 (100).

23. The method according to claim 21 or 22, wherein different calibrations / settings are set in a plurality of temperature sensors (16), and measurements from the plurality of temperature sensors (16) are compared and / or processed together to determine the resulting shell temperature.

24. The method according to any one of claims 21 to 23, wherein signals from identical radiation sensors (62) are evaluated in different ways.

25. The method according to any one of claims 21 to 24, wherein calibration / setting or adjustment of at least one temperature sensor (16) is performed using measurements from a different type of the second sensor (62), or a method for determining the resulting shell temperature is determined using measurements from a different type of the second sensor (62).

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