JP2014142344A - Measuring roller for detecting flatness deviation of belt-like material and method of detecting flatness deviation of belt-like material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measuring roller for detecting the flatness deviation of a belt-like material, which is capable of more accurately and/or more easily measuring the flatness deviation.SOLUTION: The measuring roller for detecting flatness deviation of a belt-like material has a longitudinal axial line and at least one sensor which is arranged in a recess provided in the measuring roller and is capable of generating a measurement signal corresponding to a force applied to an outer surface of the measuring roller. The measuring roller includes a first temperature sensor located at a first distance from the longitudinal axial line in the radial direction and a second temperature sensor located at a second distance different from the first distance from the longitudinal axial line in the radial direction.

Description

  The present invention relates to a measuring roller and a method for detecting a flatness deviation of a strip-like article.

  In the following Patent Document 1, a measuring roller for detecting a flatness deviation when processing a strip-shaped article is known. This known measuring roller is formed as a hollow roller composed of a plurality of rings that are held together by fastening bolts. Another structural form of a measuring roller that detects a flatness deviation when processing a strip-shaped article is known in Patent Document 2 below. In the following Patent Document 3, a measuring roller that detects a flatness deviation when processing a strip-shaped article is formed as a solid roller, and the sensor is disposed in a notch accessible from the axial direction. It is known. Another possibility of assembling a sensor in the measuring roller is known in the following patent document 4 and the following patent document 5. In Patent Document 6 below, a holder for a pressure sensor is known that can hold the sensor in a notch of a measuring roller.

  The measuring rollers known in the prior art already provide good measurement results regarding the flatness deviation of the strip-like article in its actual use. The measuring roller known in the prior art is known to be used when detecting a flatness deviation, particularly when processing a metal strip. The metal strip is guided through the measurement roller that is rotated, and as a result, is wound around the outer surface (circumferential surface) of the measurement roller. The metal strip applies a radial force to the outer surface of the measuring roller by wrapping around the measuring roller. A sensor provided on the measurement roller generates a measurement signal corresponding to the force applied to the outer surface of the measurement roller. By providing a plurality of such sensors in different sectors (Sektor: circumferential sector) of the measuring roller, it is determined whether the metal strip is applying different forces at different locations on the outer surface of the measuring roller. It is possible. If different measurement signals are generated, this alone is an indicator that a flatness deviation already exists. Furthermore, by analyzing the difference between the measurement signals, it is possible to obtain information on how flatness deviation is and where the flatness deviation exists.

German Patent Application No. 2944723 German Patent Application Publication No. 4236657 German Patent No. 10207501 German Patent 19196980 Federal Republic of Germany Patent No. 19838457 German Patent Application Publication No. 102006003792

  With the above point as a background, the problem underlying the present invention is a measuring roller for detecting the flatness deviation of a strip-like article, which can measure the flatness deviation with higher accuracy and / or more easily. And to propose a method.

  In order to solve the above problems, a measuring roller for detecting a flatness deviation of a strip-shaped article according to the present invention, which is disposed in a longitudinal axis and a notch provided in the measuring roller. A measuring roller for detecting a flatness deviation of a strip-like article from a longitudinal axis, wherein the measuring roller includes at least one sensor capable of generating a measurement signal according to a force applied to an outer surface of the measuring roller. A first temperature sensor disposed at a first distance in a radial direction and a second temperature sensor disposed at a second distance different from the first distance in a radial direction from a longitudinal axis. Temperature sensor.

  A preferred embodiment is the invention according to the dependent claims.

  In a preferred embodiment, the measuring roller according to the present invention includes a substantially columnar integrated base, and a notch is provided in the base.

  In a preferred embodiment, the first and / or second temperature sensor is a resistance thermometer (PT100 sensor) or a thermocouple.

  In a preferred embodiment, the first temperature sensor and the second temperature sensor are disposed in substantially the same plane, and the longitudinal axis forms a normal to the plane.

  In a preferred embodiment, the first temperature sensor and the second temperature sensor are arranged on approximately one line that faces the radial direction of the measuring roller from the longitudinal axis.

  In a preferred embodiment, the measuring roller according to the present invention has a notch having a sensor or an assembly disposed in another notch, the assembly being integrally formed, The temperature sensor and / or the second temperature sensor are arranged on the assembly so as to be able to measure the surface temperature of the surface section of the assembly, or the assembly is formed of a plurality of parts; The first temperature sensor and / or the second temperature sensor is in one part of the assembly so that the surface temperature of the surface section of this part can be measured or is part of the assembly, thereby It arrange | positions so that it may be arrange | positioned inside the assembly | attachment body.

  In a preferred embodiment, the first and / or second temperature sensor is arranged in the notch and is arranged to measure the temperature of the surface section defining the notch.

  Furthermore, in order to solve the above-described problem, a method for detecting a flatness deviation of a strip-shaped article according to the present invention, wherein the above-described measuring roller is used, and the measuring roller is at least a first notch. A first sensor disposed within the second notch and a second sensor disposed within the second notch, wherein the first notch and the second notch are respectively in the circumferential direction of the measuring roller. The first sensor can generate a first measurement signal according to the force applied to the outer surface of the measuring roller, and the second sensor can be applied to the outer surface of the measuring roller. A second measurement signal corresponding to the applied force can be generated, and the strip-shaped article is guided through the outer peripheral surface of the measurement roller to be brought into contact with at least a part of the surface of the measurement roller, and the first temperature The first temperature signal generated by the sensor and the second temperature sensor. The first temperature signal generated from the second temperature signal generated by the first sensor is corrected, and the first measurement signal generated by the first sensor and the difference signal are used to generate a modified first measurement in the evaluation unit. A signal was generated.

  In addition to at least one sensor provided on this type of measuring roller and capable of generating a measuring signal in response to the force applied to the outer surface of the measuring roller, the present invention can also be used in the radial direction from the longitudinal axis of the measuring roller. And a second temperature sensor disposed at a second distance different from the first distance in a radial direction from the longitudinal axis. It starts from the basic idea of using and. In this manner, the first and second temperature sensors are additionally arranged at different radial intervals with respect to the longitudinal axis, so that the location where the first temperature sensor is arranged, and the second It is possible to obtain a temperature change with the place where the temperature sensor is arranged. From experiments, the way the force transmitted through the measuring roller is related to the temperature situation so that the force applied to the outer surface of the measuring roller can be recorded by a sensor that generates a measurement signal in response to this force. It is known that there is a case to show. The temperature measured at the location of the first temperature sensor or the temperature measured at the location of the second temperature sensor and / or the difference between these two temperatures can be determined by the measurement signal generated by the sensor in response to the applied force. Can be used to correct, for example, if a certain height of the measurement signal is a first temperature condition, a force having a certain first height has been applied to the outer surface of the measuring roller On the other hand, the same height of the measurement signal can be used to correct when different temperature conditions may mean that a force with a different height was applied to the outer circumference of the measurement roller It is. Similarly, the arrangement of the first temperature sensor and the second temperature sensor as in the present invention increases the possibility of estimating the change in the preload of the sensor assembled in the notch under the preload in the preferred embodiment. provide. From an experiment, estimating the change in preload of the sensor assembled under preload from the difference between the temperature measured at the location of the first temperature sensor and the temperature measured at the location of the second temperature sensor. Is known to be possible.

  The measurement roller according to the present invention may be, for example, a hollow roller composed of a plurality of rings that are held together by fastening bolts, as is well known in the above-mentioned Patent Document 1. In a preferred embodiment, the measuring roller is formed as a so-called solid roller. A solid roller is understood as a measuring roller having a substantially integral substrate. The base generally consists of a cylindrical central portion having a journal at the end for supporting the measuring roller. In order to form a measuring roller, the substrate is often provided with at least one sensor (this sensor or this sensor) that can generate a measuring signal in response to a force applied to the outer surface of the measuring roller, for example only a few components. Only the necessary wiring for this type of sensor is added. Furthermore, this type of measuring roller formed as a solid roller may have a surface coating. Another small piece is added that serves to secure the sensor in the notch. However, this type of solid roller is characterized by a solid integral substrate.

  In a preferred embodiment, the measuring roller consists essentially of steel.

  It has been found that this material is particularly well suited for transmitting the force applied to the outer surface of the measuring roller to a sensor that generates a measurement signal in response to the force. Furthermore, a measuring roller manufactured from this type of material can also be used in particular in one of the preferred fields of use of the invention, i.e. above the room temperature in which it is dominant at the time of measurement in the preferred field of use. It can also be used during the treatment of hot or hot metal strips having a temperature, particularly preferably above 50 ° C., particularly preferably above 300 ° C.

  The notch in which at least one sensor for generating a measurement signal according to force is arranged is measured in a preferred embodiment in a radial direction from the outer surface, as is known, for example, in the above-mentioned patent document 4 or the above-mentioned patent document 5. It may be a notch provided in the roller. However, in another preferred embodiment, the notch in which the sensor for generating the measurement signal corresponding to the applied force is arranged is formed in the axial direction as is known in Patent Document 3 above.

  In a preferred embodiment, the sensor is assembled in the notch under preload, for example as part of an assembly (Einbau) consisting of a plurality of parts arranged in the notch. The possibility of assembly under preload is known from FIGS. 6 and 7 of the above-mentioned Patent Document 3 and FIGS. 9, 10 and 11 as another embodiment. In the present invention, the assembly of the sensor in the notch is also performed. Can be used for attaching.

  The advantages of the present invention can also be achieved with a measuring roller that already has only one sensor or a small number of sensors capable of generating a measuring signal in response to the force applied to the outer surface of the measuring roller. In a preferred embodiment, a larger number of such sensors are arranged at different locations in the circumferential direction of the measuring roller. The number of sensors arranged in the circumferential direction is such that when the strip-shaped article is brought into contact with the outer surface of the measuring roller and the movement of the strip-shaped article in the strip direction is accompanied by the rotation of the measuring roller, The resolution for detecting the flatness deviation of the strip-like article is improved. If only a few sensors are used in the circumferential direction of the measuring roller, the part of the surface of the strip-like article to be inspected that has a particularly strong flatness deviation is just the measuring roller, which is not provided with a sensor. There is a possibility of contact with the surface of the measuring roller in the sector.

  A possible arrangement of the sensors in the measuring roller is shown in FIG. It is also possible to provide a plurality of sensors in the notch shown there, for example, as shown in FIG. The number of sensors in the circumferential direction of the measuring roller improves the resolution in the direction of the band of the strip-shaped article. Similarly, the number of sensors in the axial direction of the measuring roller determines the band of the strip-shaped article. The resolution of the measurement result in the material width direction (that is, the direction perpendicular to the band direction of the band-shaped article and not the thickness direction of the band-shaped article) is improved.

  In a preferred embodiment, one, several or all of the temperature sensors provided can measure the temperature of the outer surface (peripheral surface) of the measuring roller or, for example, in the form of an integral substrate cylinder It may be arrange | positioned so that the temperature of the end surface of this part can be measured. In a preferred embodiment, one, several or all temperature sensors are arranged in the measuring roller. In a particularly preferred embodiment, the temperature sensor arranged in the measuring roller is arranged in the notch. In a particularly preferred embodiment, the temperature sensor is mounted in the notch so that the surface temperature of the surface section defining the notch can be measured. Alternatively, the temperature sensor may be arranged to measure the temperature of the fluid (in most cases air) present in the notch. Alternatively, the temperature sensor may be arranged to measure the temperature of the fluid (most often air) present in any other notch.

  In a preferred embodiment, the temperature sensor measures the temperature desired to be measured by the temperature sensor by contact. For example, a resistance thermometer (PT100 sensor) or a thermocouple can be used as the temperature sensor. However, it is also possible for the temperature sensor to measure, for example, optically, for example by infrared measurement, or for example by irradiating a laser beam and determining the temperature from the laser beam reflected by the surface to be measured.

  In a preferred embodiment, the first temperature sensor and the second temperature sensor are arranged in the same notch of the measuring roller. Particularly preferably, the first temperature sensor and the second temperature sensor are arranged in the same notch where there is also a sensor that generates a measurement signal in accordance with the applied force. In a preferred embodiment, in particular an embodiment having a sensor also provided in the notch, the first temperature sensor measures the temperature of the inwardly facing interface located radially outward of the notch. The second temperature sensor measures the temperature of the surface located radially inward of the notch boundary and facing outward.

  In a preferred embodiment, the first temperature sensor and the second temperature sensor are disposed in substantially the same plane, and the longitudinal axis forms a normal to the plane. In order to improve the measurement signal generated by the sensor in response to the applied force, it has been found that changes in the radial direction of the internal temperature of the measuring roller, in particular, may be important. Therefore, in a preferred embodiment, it is worth considering that the first temperature sensor and the second temperature sensor are arranged in one plane and the longitudinal axis is normal to this plane. In such an arrangement, the temperature sensor mainly measures the temperature change in the radial direction. In that case, it is particularly preferable that the first temperature sensor and the second temperature sensor are arranged such that they are arranged on approximately one line that faces the radial direction of the measuring roller from the longitudinal axis. . In particular in one of the preferred fields of use of the invention, ie when detecting flatness deviations when processing hot metal strips, especially when the measuring roller is cooled to protect the measuring device, It can be expected that a particularly high temperature is dominant in the sector of the measuring roller in contact with the strip, whereas a clearly lower temperature is dominant in the other sectors of the measuring roller. Particularly in such use cases, an advantage arises from arranging the first temperature sensor and the second temperature sensor substantially on a single line from the longitudinal axis to the radial direction of the measuring roller. . Thereby, the first temperature sensor and the second temperature sensor are arranged substantially in the same sector of the measuring roller, so that the temperature profile inside the measuring roller can be measured in this sector. It is guaranteed.

  The first temperature sensor and / or the second temperature sensor may be provided as part of a holder for a sensor that generates a measurement signal in response to a force. For example, the first temperature sensor and / or the second temperature sensor may be assembled in a holder for a pressure sensor capable of measuring a pressure input from above. A first inner wedge element disposed above the assembly position for the pressure sensor, the inner surface facing the assembly position of the pressure sensor, and the inner surface inclined at an angle to the inner surface; A first inner wedge element having an outer surface located on the opposite side, and a first outer wedge element, the first outer wedge element coming into contact with the outer surface of the first inner wedge element A first outer wedge element having an inner surface facing the assembly position of the pressure sensor and an outer surface located on the opposite side of the inner surface, and a first element disposed below the assembly position for the pressure sensor A second inner wedge element having an inner surface facing the assembly position of the pressure sensor and an outer surface inclined at an angle with respect to the inner surface and positioned opposite to the inner surface. Element and a second outer wedge element, the second outer wedge element There is provided a second outer wedge element having an inner surface facing the mounting position of the pressure sensor and an outer surface located on the opposite side of the inner surface, which comes into contact with the outer surface of the second inner wedge element. ing.

  In a preferred embodiment of the structural form in which the first temperature sensor and / or the second temperature sensor are provided as part of such a holder, the temperature sensor comprises a first inner wedge element, a first outer wedge element, a first It may be arranged to measure the surface temperature of the surface of the wedge element which is provided on the two inner wedge elements or the second outer wedge element and which is arranged correspondingly.

  In a preferred embodiment, the temperature element may be arranged on the outer wedge element to measure the temperature of the surface of the wall defining the notch with which the holder is assembled and against which the outer wedge element is pressed.

  In a particularly preferred embodiment, the first temperature sensor is arranged corresponding to the first outer wedge element and the second temperature sensor is arranged corresponding to the second outer wedge element. Particularly preferably, the first temperature sensor measures the temperature of the upper surface of the wall defining the notch to which the holder is assembled and the outer wedge element is pressed, and the second temperature sensor Measures the temperature of the lower surface of the wall that defines the notch against which the holder is assembled and against which the outer wedge element is pressed.

  In a preferred embodiment, the holder extends through the mounting position of the pressure sensor and is geometrically symmetrical with respect to a plane arranged perpendicular to the direction of pressure application to be measured. Adjustment of the geometry of the components already placed above the pressure sensor and below the pressure sensor can reduce the tilting moment (Kipmoment) that occurs when preloading is applied, and even completely prevent it. .

  As an alternative or in addition, the holder extends through the mounting position of the pressure sensor and is for a component that forms the holder with respect to a plane arranged perpendicular to the direction of action of the pressure to be measured. It may be formed symmetrically with respect to the materials used for and / or with respect to the surface properties of these components. The tilting moment is not only caused by the geometrical differences of the components provided on the upper and lower sides of the pressure sensor, but also on the upper and lower sides of the pressure sensor based on different material selections or different surface properties. In some cases, different frictional forces are generated between the mutually moving surfaces. This can be avoided by forming the relevant material or surface properties symmetrically.

  In a preferred embodiment, a coupling portion is provided for coupling the first inner wedge element and the second inner wedge element in order to avoid relative movement in a direction other than the direction of the pressure to be measured. The tilting moment to be avoided may also be caused by the fact that the comparable components do not move synchronously with each other on the upper side of the pressure sensor and the lower side of the pressure sensor. This can be avoided if the corresponding components are coupled together. However, preferably, this coupling part is formed so as to allow movement of both coupled components in the direction of action of the pressure to be measured. In the case of a holder for a pressure sensor whose pressure to be input from above is to be measured, it is preferable to keep the force diversion as small as possible by structural means, i.e. the holder of the pressure to be measured. Attempts are made to keep the portion that passes through the pressure sensor through the small. This is achieved by the fact that the components are elastically formed relative to each other in the direction of the pressure to be measured, and the spring stiffness of the bridging portion of the force generated by the coupling is as low as possible. .

  In another aspect of the present invention, a coupling is provided that couples the first outer wedge element and the second outer wedge element to avoid relative movement in a direction that is not the direction of pressure to be measured. . This achieves the same advantages as the connection of the inner wedge elements.

  The outer surface of the first inner wedge element and / or the outer surface of the second inner wedge element may be formed flat in the form of a flat wedge, but in a preferred embodiment the first inner wedge element The outer surface of the wedge element and / or the outer surface of the second inner wedge element is formed as a conical partial surface so that the conical longitudinal axis extends through the mounting position of the pressure sensor. For the tilting moment formed when preloading is applied, it is important to what degree of accuracy the individual face-to-face geometries of the mutually moving relative faces can be produced. It has been found that the production of a conical partial surface, for example by cutting (turning) a semi-finished product, can be made with higher accuracy than the flat wedge plane. Therefore, a further reduction in the tilting moments generated is achieved by the special configuration of these outer surfaces.

  For the same reason, the inner surface of the first outer wedge element and / or the inner surface of the second outer wedge element is preferably a partial surface at the boundary of the conical notch, the conical longitudinal axis being the set of pressure sensors. It is formed to extend through the attachment position.

  In a preferred embodiment, the first inner wedge element and the second inner wedge element are partial elements of the inner sleeve that are manufactured in one piece. This offers advantages both with respect to the manufacture of the holder components and with respect to the handling of the holder during assembly of the pressure sensor.

  In a preferred embodiment, the inner sleeve has a longitudinal slit between the first inner wedge element and the second inner wedge element. The longitudinal slit extends substantially perpendicular to the direction of action of the pressure to be measured. Thereby, the spring rigidity of the inner sleeve is reduced. As a result, the force diversion is kept slightly. Furthermore, the inner sleeve may be formed with a slight wall thickness. The slight wall thickness is understood as a wall thickness of 0.3 mm to 5 mm, for example, when the inner diameter is a general one of 20 mm to 50 mm, for example. The selected wall thickness of the sleeve may be selected based on the sleeve length, travel distance, and slope. The wall thickness may be 1/10 mm at the thinnest location. In particular, the longitudinal slit has substantially the same length as the entire longitudinal extension length of the inner sleeve, and the first inner wedge element and the second inner wedge element only at one or both ends. It may be formed so that a thin web remains as a joint between the two. In a preferred embodiment, the inner sleeve has two longitudinal slits. Preferably, the longitudinal slit or slits are provided in a plane extending through the mounting position of the pressure sensor and arranged perpendicular to the direction of action of the pressure to be measured.

  As in the case of the inner wedge element, in a preferred embodiment, alternatively or additionally, the first outer wedge element and the second outer wedge element are part elements or parts of the outer sleeve manufactured integrally. May be. This outer sleeve may in a preferred embodiment also have at least one longitudinal slit between the first outer wedge element and the second outer wedge element. The longitudinal slit extends substantially perpendicular to the direction of action of the pressure to be measured.

  In a preferred embodiment, the inner surface of the first inner wedge element and / or the inner surface of the second inner wedge element are formed in a planar shape and are arranged in a plane perpendicular to the direction of action of the pressure to be measured. ing. This type of arrangement makes it possible to insert a pressure sensor, which is usually planar on its upper and lower surfaces, between the inner wedge elements so that it abuts directly against the inner surface.

  Alternatively, in another aspect of the present invention, there is a first intermediate member having a caplet between the first inner wedge element and the pressure sensor assembly position, and / or A second intermediate member having a circular lid portion may be provided between the second inner wedge element and the assembly position of the pressure sensor. A circular lid portion forming a surface facing the inner surface of the inner wedge element and the inner surface of the inner wedge element are formed to correspond to each other. In that case, the circular lid part preferably has the geometric shape of the partial surface of the cylindrical body.

  In a preferred embodiment of the invention, the outer surface of the first and / or second outer wedge element is a partial surface of a cylindrical body. This configuration is particularly recommended in fields of use where the pressure sensor is to be held by a holder in a hole in the measuring roller, for example an axial hole.

  The holder may have a centering pin that engages with a centering hole provided in the component. With this centering pin, individual separate components, such as pressure sensors, can be well and accurately positioned relative to other components, such as inner wedge elements or inner sleeves.

  In a preferred embodiment, the holder has internal threads provided in the first and second outer wedge elements. The longitudinal axis of the female thread extends through the pressure sensor assembly position and a push screw screwed into the female thread. The push screw can contact the first inner wedge element and the second inner wedge element, and can move both inner wedge elements relative to the first and second outer wedge elements. . With this push screw, it is possible to easily apply a preload to the holder. By forming the inner wedge element and the outer wedge element corresponding to each other so that each outer surface is inclined at an angle with respect to each inner surface, the relative movement between the wedge elements causes the outer wedge element to be Advance further from the attachment position. In this way, it is possible to tighten the holder in the notch.

  Alternatively, the holder may have internal threads provided in the first and second inner wedge elements. The longitudinal axis of the female thread extends through the pressure sensor assembly position and a pull screw that is threaded into the female thread. The pull screw can contact the first and second outer wedge elements with a screw head and move both outer wedge elements relative to the first and second inner wedge elements. .

  In a preferred embodiment, it has a notch with a sensor or an assembly disposed in another notch, the assembly being integrally formed, the first temperature sensor and / or the second The temperature sensor is arranged on the assembly so as to be able to measure the surface temperature of the surface section of the assembly, or the assembly is formed from a plurality of parts, for example like the holder described above, The first temperature sensor and / or the second temperature sensor is in one part of the assembly so that the surface temperature of the surface section of this part can be measured or is part of the assembly, thereby It arrange | positions so that it may be arrange | positioned inside the assembly | attachment body.

  A method for detecting a flatness deviation of a strip-shaped article according to the present invention is performed using the measuring roller according to the present invention, and the measuring roller is disposed at least in the first notch. 1 sensor and a second sensor arranged in the second notch, and the first notch and the second notch are arranged at different locations in the circumferential direction of the measuring roller. The first sensor can generate a first measurement signal according to the force applied to the outer surface of the measurement roller, and the second sensor can generate a first measurement signal according to the force applied to the outer surface of the measurement roller. Two measurement signals can be generated, and a strip-shaped article is guided through the outer peripheral surface of the measurement roller and brought into contact with at least a part of the surface of the measurement roller. In the method according to the present invention, a difference signal is generated from the first temperature signal generated by the first temperature sensor and the second temperature signal generated by the second temperature sensor, and the first sensor is generated. In the evaluation unit, a modified first measurement signal is generated from the first measurement signal generated by the step and the difference signal.

  In particular, it has been shown from experiments that if the measuring roller, which was initially uniformly temperature-controlled, has a temperature profile inside the measuring roller based on the hot and / or cold source acting on the measuring roller, It has been found that a sensor arranged in a notch under preload, which can generate a measurement signal according to the force applied to the surface, can detect changes in the preload of the sensor. Such a temperature profile is generated, for example, when a hot metal strip contacts the measuring roller in the upper surface area of the measuring roller and the measuring roller is cooled from below by ambient air or even cooling water. Is possible. Every unit time, the part of the measuring roller that is in the vicinity of the high-temperature metal strip is present in the vicinity of the cooling part at a later point in time based on the rotational movement of the measuring roller. The temperature of the roller is higher than that of the portion existing in the vicinity of the cooling unit. The presence of a temperature profile per unit time is also determined by the rotational movement of the measuring roller and the alternating arrangement of the individual sections of the measuring roller, sometimes in the vicinity of the hot strip and sometimes in the vicinity of the cooling section. Regular changes in the temperature of each part of the measuring roller due to the above can also have an effect on the quality of the measurement signal generated by the sensor in response to the applied force. Experiments have shown that there is a generally linear relationship, in particular, between roller jacket temperature rise and sensor preload reduction.

  In a preferred embodiment, the measuring roller according to the invention or the method according to the invention is used for detecting the flatness deviation of a metal strip. Particularly preferably, the measuring roller according to the invention or the method according to the invention has a temperature higher than the dominant room temperature, particularly preferably higher than 50 ° C., particularly preferably higher than 300 ° C., at the time of measuring the surface temperature. Used to detect flatness deviation of metal strip with high temperature.

It is sectional drawing of the holder which has the pressure sensor in the state assembled | attached in the measuring roller which looked at the cross section along line BB shown in FIG. 2 is a cross-sectional view of the element of FIG. 1 along line AA shown in FIG. FIG. 3 is a cross-sectional view of the elements of FIGS. 1 and 2 along the line CC shown in FIG. 2. It is the figure which showed the alternative structural form of the holder in the form comparable with FIG. It is the figure which showed another structural form of the holder in the form comparable with FIG. FIG. 6 is a cross-sectional view of the element of FIG. 5 along line AA shown in FIG. FIG. 7 is a cross-sectional view of the elements of FIGS. 5 and 6 along the line CC shown in FIG. 6. It is the figure which showed another structural form of the holder in the form comparable with FIG.1 and FIG.5. It is the figure which looked at the other structural form in a measurement roller partially, and was seen from the side. FIG. 10 is a detailed view of a possible solution of the structural form shown in FIG. 9.

  FIG. 1 shows a holder 1 for a pressure sensor 2. The holder 1 holds the pressure sensor 2 in the axial direction hole 3 of the measuring roller 4 cut out. The holder 1 has an inner sleeve 5. The inner sleeve 5 has a first inner wedge element 6 arranged above the assembly position for the pressure sensor 2. The first inner wedge element 6 has an inner surface 7 that faces the assembly position of the pressure sensor 2 and an outer surface 8 that is inclined at an angle with respect to the inner surface 7 and is located on the opposite side of the inner surface 7. doing. Furthermore, the inner sleeve 5 has a second inner wedge element 9 which is arranged below the assembly position for the pressure sensor 2. The second inner wedge element 9 has an inner surface 10 facing the assembly position of the pressure sensor 2 and an outer surface 11 that is inclined with respect to the inner surface 10 and is located on the opposite side of the inner surface 10. doing.

  Further, the holder 1 has an outer sleeve 12. The outer sleeve 12 has a first outer wedge element 13. The first outer wedge element 13 has an inner surface 14 that faces the assembly position of the pressure sensor 2 and an outer surface 15 that is inclined with respect to the inner surface 14 and is located on the opposite side of the inner surface 14. doing. Furthermore, the outer sleeve 12 has a second outer wedge element 16. The second outer wedge element 16 has an inner surface 17 facing the assembly position of the pressure sensor 2, and the inner surface 17 abuts against the outer surface 11 of the second inner wedge element 9. Further, the second outer wedge element 16 has an outer surface 18 located on the opposite side of the inner surface 17.

  A push screw 19 having a male thread is screwed into a female thread 20 provided in the outer sleeve. The depth of insertion of the push screw 19 determines the relative position of the inner sleeve 5 with respect to the outer sleeve 12 and thus the degree of preload of the holder 1 in the axial hole 3.

  As can be seen in FIG. 2, the inner sleeve 5 and the outer sleeve 12 have slits 21 or 22. These longitudinal slits 21, 22 contribute to reducing the spring stiffness of the inner sleeve 5 or the outer sleeve 12 and keeping the force diversion slightly. Therefore, the pressure to be detected that works in the direction of action of the arrow D is satisfactorily introduced into the pressure sensor 2. The outer sleeve 12 and the inner sleeve 5 can be manufactured by cutting (turning) in the first processing step. Thereby, in particular, the shapes of the inner surfaces 14 and 17 of the outer sleeve 12 and the outer surfaces 8 and 11 of the inner sleeve 5 can be manufactured with high precision with particularly narrow tolerances, so that the inner sleeve 5 can be tilted with respect to the outer sleeve 12. Allows moment-free relative motion. In order to reduce the wall thickness on the side of the inner sleeve 5, the width of the region of the inner sleeve 5 that is disposed on the side as viewed in FIG. 2 may be further reduced in a subsequent processing step. As a result, side spaces 23 and 24 as seen in FIG. 2 are formed between the inner sleeve 5 and the outer sleeve 12. The spaces 23 and 24 facilitate the introduction of force to the pressure sensor 2 and further reduce the force diversion.

  FIG. 3 is a plan view of the pressure sensor 2. In FIG. 3, the cable assembly leading to the pressure sensor 2 can be seen well. The first cable 25 communicates with the illustrated pressure sensor 2, and the other cable 26 communicates with another pressure sensor (not illustrated) disposed in the same axial hole 3.

  1 to 3 show a first temperature sensor 40 assembled to the first outer wedge element 13 and a second temperature sensor 41 assembled to the second outer wedge element 16. . Both temperature sensors 40 and 41 are attached so that the surface temperature of the surface section defining the notch can be measured vertically.

  The other embodiment shown in FIG. 4 of the holder basically has the same structure as the holder 1 shown in FIGS. The same constituent elements are denoted by reference numerals plus 100. However, the inner sleeve 105 of the second embodiment is provided with a plurality of notches 126. These notches 126 further reduce the wall thickness on the side of the inner sleeve 105, which leads to a smaller spring stiffness and thus a smaller force split. Also in the embodiment shown in FIG. 4, the first temperature sensor 140 and the second temperature sensor 141 are provided.

  5 to 7 show another embodiment of the present invention. This embodiment is different from the embodiment shown in FIGS. 1 to 3 in that intermediate members 227 and 228 having a circular lid portion are provided between the inner sleeve 205 and the pressure sensor 202. To do. In other respects, the constituent elements shown correspond to the elements shown in FIGS. 1 to 3 and are denoted by reference numerals plus 200. Also in the embodiment shown in FIGS. 5 to 7, the first temperature sensor 240 and the second temperature sensor 241 are provided.

  FIG. 8 shows a holder 301 that can be compared with the holder 1 shown in FIG. The holder 301 is different from the holder 1 shown in FIG. 1 in that the inner surfaces 308 and 311 and the directions of the outer surfaces 314 and 317 corresponding to the inner surfaces 308 and 311 are changed and the inner thread 305 of the inner sleeve 305 is screwed. The difference is that a drawn screw 329 is provided. The threading depth of the pull screw 329 into the female thread 330 determines the relative position of the inner sleeve 305 with respect to the outer sleeve 312 and thus the preload of the holder 301 in the axial hole 303 of the measuring roller 304. The same constituent elements are denoted by reference numerals added with 300. Also in the embodiment shown in FIG. 8, the first temperature sensor 340 and the second temperature sensor 341 are provided.

  In the embodiment shown in FIG. 9, the measuring roller 401 has a journal 402. The measuring roller 401 includes a metal jacket 444 that is shrink-fitted to the roller body, and a plurality of axially parallel holes 403 that are disposed immediately below the metal jacket 444. From the axially parallel hole 403, a lateral passage 404 is branched in the vicinity of the end face of the measuring roller 401 and communicates with the central cable passage 405. These holes are closed by a single cover 406 or individually by a plurality of covers and contain sensors 407. From the sensor 407, one cable 408 is led out through the hole 403, the lateral passage 404 and the central cable passage 405, respectively. The wedge 414 applies a preload to the sensor 407. In the embodiment shown in FIG. 9, the first temperature sensor 440 is arranged on the end surface of the measuring roller 401 with a first radial interval R1 with respect to the longitudinal axis, and the first radial sensor 440 is arranged. The possibility that the second temperature sensor 441 is arranged at a second interval R2 different from the interval R1 is shown.

  As shown in FIG. 10, the hole 403 may be connected to the longitudinal groove 421. In the longitudinal groove 421, a lower part of a separate clamping wedge 414 is guided, and the inclined surface of the clamping wedge 414 cooperates with the inclined surface of the housing 423. When the housing 423 is clamped in the radial direction using the clamping wedge 414 guided in the longitudinal groove 421, it is ensured that the housing 423 is not misaligned in the hole 403, ie not tilted. In the case of the illustrated measuring roller 401, the sensor 407 is arranged in a housing 423 consisting of four parts. The housing 423 has parallel clamping surfaces 424 and 425 and two end face plates 426 and 427 which are located opposite to each other. The first temperature sensor 442 shown in FIG. 10 is disposed in a unique notch, and the second temperature sensor 443 is disposed in the hole 403.

  DESCRIPTION OF SYMBOLS 1 Holder, 2 Pressure sensor, 3 Axial direction hole, 4 Measuring roller, 5 Inner sleeve, 6 First inner wedge element, 7 Inner surface, 8 Outer surface, 9 Second inner wedge element, 10 Inner surface, 11 Outer surface, 12 Outer Sleeve, 13 first outer wedge element, 14 inner surface, 15 outer surface, 16 second outer wedge element, 17 inner surface, 18 outer surface, 19 push screw, 20 female thread, 21 slit, 22 slit, 23 space, 24 space, 25 first cable, 26 another cable, 40 first temperature sensor, 41 second temperature sensor, 105 inner sleeve, 126 notch, 140 first temperature sensor, 141 second temperature sensor, 202 pressure sensor 205, inner sleeve, 227 intermediate member, 228 intermediate member, 240 first temperature Sensor 241 second temperature sensor 301 holder 303 axial hole 304 measuring roller 305 inner sleeve 308 inner surface 311 inner surface 312 outer sleeve 314 outer surface 317 outer surface 329 pull screw 330 female thread 340 First temperature sensor, 341 second temperature sensor, 401 measuring roller, 402 journal, 403 hole, 404 lateral passage, 405 central cable passage, 406 cover, 407 sensor, 408 cable, 414 wedge, 421 longitudinal groove , 414 clamping wedge, 423 housing, 424 clamping surface, 425 clamping surface, 426 end surface plate, 427 end surface plate, 440 first temperature sensor, 441 second temperature sensor, 442 first Temperature sensor, 443 second temperature sensor, 444 metal jacket, D arrow (direction of action), R1 first radial spacing, R2 second spacing

Claims (8)

A measuring roller for detecting a flatness deviation of a strip-shaped article,
A longitudinal axis;
At least one sensor disposed in a notch provided in the measurement roller and capable of generating a measurement signal in response to a force applied to an outer surface of the measurement roller;
In a measuring roller for detecting flatness deviation of a strip-like article,
A first temperature sensor disposed at a first distance in a radial direction from the longitudinal axis;
A second temperature sensor arranged in a radial direction from the longitudinal axis with a second spacing different from the first spacing;
A measuring roller for detecting a flatness deviation of a strip-like article.   The measuring roller according to claim 1, comprising a substantially cylindrical integrated base body, wherein the notch is provided in the base body.   The measuring roller according to claim 1 or 2, wherein the first and / or second temperature sensor is a resistance thermometer (PT100 sensor) or a thermocouple.   The first temperature sensor and the second temperature sensor are arranged in substantially the same plane, and the longitudinal axis forms a normal line with respect to the plane. The measurement roller according to any one of claims.   The measurement roller according to claim 4, wherein the first temperature sensor and the second temperature sensor are arranged on substantially one line facing the radial direction of the measurement roller from the longitudinal axis. Having an assembly disposed in a notch with the sensor or in another notch,
The assembly is integrally formed so that the first temperature sensor and / or the second temperature sensor can measure the surface temperature of the surface section of the assembly on the assembly. Or the assembly is formed of a plurality of parts, and the first temperature sensor and / or the second temperature sensor is disposed on one part of the assembly. In such a way that the surface temperature of the surface section can be measured or is part of the assembly and thereby arranged within the assembly,
The measuring roller according to any one of claims 1 to 5.   The first and / or second temperature sensor is arranged in a notch and is arranged to measure the temperature of the surface section defining the notch. The measuring roller according to claim 1. A method for detecting a flatness deviation of a strip-shaped article,
The measurement roller according to any one of claims 1 to 7, wherein the measurement roller is disposed at least in a first sensor disposed in the first notch and in the second notch. A second sensor, and the first notch and the second notch are arranged at different locations in the circumferential direction of the measurement roller, and the first sensor The first measurement signal can be generated according to the force applied to the outer surface of the roller, and the second sensor can generate the second measurement signal according to the force applied to the outer surface of the measurement roller. And
A first temperature signal generated by a first temperature sensor, wherein the strip-shaped article is guided through the outer peripheral surface of the measurement roller and brought into contact with at least a part of the surface of the measurement roller; A difference signal is generated from the second temperature signal generated by the second temperature sensor and corrected in the evaluation unit from the first measurement signal generated by the first sensor and the difference signal. A method for detecting a flatness deviation of a strip-like article, characterized in that a first measurement signal is generated.

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