Measurement roll for detecting characteristics of band-like object guided by measurement roll, usage of measurement roll for detecting characteristics of band-like object guided by measurement roll, and method for specifying position of band edge part of band-like object

Abstract

To provide a band-like object guided by a measurement roll, and specifically a measurement roll for detecting characteristics of a metal band.SOLUTION: A measurement roll 1 includes: a measurement roll body 1a with a peripheral surface; at least one recessed part 408 in the measurement roll body 1a, the at least one recessed part 408 being arranged away from the peripheral surface or extending from the peripheral surface to the inside of the measurement roll body 1a; and a force sensor 406 arranged in the recessed part 408, the force sensor 406 having a sensor surface and a first force sensor 406 being capable of generating a sensor signal when the position of the sensor surface of the force sensor 406 is changed.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a predetermined use of a measuring roll for detecting the properties of a strip-shaped article, particularly a metal strip, guided via the measuring roll. Furthermore, the present invention relates to a method for determining the position of the strip edge of a strip-shaped article relative to a reference point, reference line, or reference plane. The present invention also relates to a measuring roll for detecting the properties of a strip-shaped article, particularly a metal strip, guided via the measuring roll.

[0002] Measuring rolls are used in the cold and hot rolling of metal strips and are known, for example, from German Patent Application Publication No. 4236657.

[0003] Conventional methods for measuring the flatness of strip material during rolling primarily involve guiding the strip material at a predetermined winding angle via a measuring roll equipped with a force sensor.

[0004] As a result, in the measuring roll described in German Patent Application Publication No. 4236657, contact occurs between the force encoder cover, which is located in a radial recess of the measuring roll that is open toward the force encoder or the surface of the measuring roll, and the strip material. There is a cylindrical gap between the force sensor, which is fastened to the bottom of the recess of the measuring roll, and the recess wall surrounding the force sensor. To prevent contaminants, such as strip material wear debris and lubricant, from entering the ring gap between the force sensor and the measuring roll body, this gap can be closed by sealing the shoulder portion with an O-ring or by sealing the front portion with a plastic layer. As shown in Figure 1c of German Patent Application Publication No. 4236657, the encoder can also be located in a recess of a solid roll and then covered by a fitted diaphragm. The cover described in German Patent Application Publication No. 4236657 has a circular outer surface, and its geometric shape is formed in a mirror image symmetric with respect to a plane extending perpendicular to the axis of rotation, and also in a mirror image symmetric with respect to the plane containing the axis of rotation.

[0005] The placement of the force sensor, spaced apart from the surrounding wall, and the closure of the ring gap with an O-ring or a sufficiently elastic plastic (German Patent Application Publication No. 19616980), prevent lateral forces generated in the body of the measuring roll during rolling from acting as disturbances on the force sensor or the measurement results. Such disturbances arise as a result of the tension acting on the measuring roll and the resulting deflection of the measuring roll. In this case, the cross-section of the measuring roll takes the shape of an ellipse with its major axis extending parallel to the strip material. When the deflection of the measuring roll is transmitted to the encoder by force branching, the deflection of the measuring roll is misinterpreted by the force sensor as non-flatness of the strip material. When a sealing member is used within the ring gap, the sealing force inevitably acts on the force sensor, so it is not possible to completely avoid such force branching. The cover described in German Patent Application Publication No. 19616980 has a circular outer surface, and its geometric shape is formed in a mirror image symmetric with respect to a plane extending perpendicular to the axis of rotation, and in a mirror image symmetric with respect to a plane containing the axis of rotation.

[0006] German Patent No. 10207501 provides a known solid roll for detecting flatness deviations when processing strip-shaped articles, particularly metal strips, the solid roll having a force sensor located in a recess, which is axially accessible. The formation of the axially extending recess is often carried out by a deep-hole drilling tool. For measuring rolls with a roll width greater than 1000 mm, an extremely long drilling tool must be used, as the drilling tool must first pass over a partially extremely long journal in order to drill from the end face side of the recess.

[0007] German Utility Model No. 202007001066 describes a measuring roll for detecting flatness deviations when processing strip-shaped articles, particularly metal strips, comprising a measuring roll body, a cover tube at least partially surrounding the measuring roll body, and a force sensor positioned in a recess, in which case the recess extends from one end face of the measuring roll into the measuring roll body and / or into the cover tube. The recess can be closed from the end face side by the cover. Journals provided on each end face of the measuring roll are formed in the measuring roll body. A drawback of this measuring roll is that the presence of the recess weakens the measuring roll body or the cover tube. For wide measuring rolls, passing through bearing journals, as in deep hole drilling, is also a significant drawback. Another problem is that since the passages / grooves are made by a milling tool (polygonal passages) rather than a drilling tool (circular passages), as in German Patent No. 10207501, wear occurs in the passages / grooves that extend to the end face.

[0008] Prior art measuring rolls determine the flatness of a strip based on individual sensors distributed around the entire circumference of the measuring roll. In this case, the measurement results of the individual sensors are often correlated with each other in order to calculate flatness during evaluation. In prior art measuring rolls, measurement errors always occur when the metal strip vibrates. This can happen, for example, when the measuring roll is located near a hoisting machine. Due to vibration, the magnitude of the force acting on the individual force sensors no longer depends solely on the strip tension and flatness, but is amplified or damped by the vibration. This is precisely where measurement errors occur in evaluation methods that compare the measurement results of individual sensors distributed around the circumference with each other.

[0009] The use of measuring rolls for detecting the position of a strip-shaped article, or for detecting the position of the edge of a strip-shaped article on the circumferential surface of a measuring roll, is publicly known with respect to specific measuring rolls in International Publication No. 2020 / 120328. The covers shown in Figure 7 of International Publication No. 2020 / 120328 each have a circular outer surface, and therefore their geometric shape is formed mirror-symmetric with respect to a plane extending perpendicular to the axis of rotation, and also mirror-symmetric with respect to the plane containing the axis of rotation. The force sensor shown in Figure 20 of International Publication No. 2020 / 120328 has an annular outer surface, and therefore its geometric shape is formed mirror-symmetric with respect to a plane extending perpendicular to the axis of rotation, and also mirror-symmetric with respect to the plane containing the axis of rotation. The force sensor shown in Figure 23 of International Publication No. 2020 / 120328 has a rectangular outer surface, and therefore its geometric shape is formed in a mirror image symmetric with respect to a plane extending perpendicular to the axis of rotation, and also in a mirror image symmetric with respect to the plane containing the axis of rotation.

[0010] According to European Patent Application Publication No. 3009206, a measuring roll suitable for detecting the flatness of a metal strip is known, and this measuring roll is, • Measuring roll body having a circumferential surface, • At least one recess in the measuring roll body, · At least one beam positioned within a recess, extending along the longitudinal axis, and A first force sensor and a second force sensor are located within the recess. It has, the beam is supported above the first force sensor and the second force sensor inside the recess, the measurement roll body extends along the rotation axis, and the longitudinal axis of the beam does not extend parallel to the rotation axis of the measurement roll body, but extends within a plane extending perpendicular to the rotation axis of the measurement roll body. The measurement beam shown in European Patent Application Publication No. 3009206 has a square outer surface, and its geometric shape is formed symmetrically with respect to a plane extending perpendicular to the rotation axis and also symmetrically with respect to a plane including the rotation axis.

[0011] From such a background, the problem underlying the present invention is to provide improved means for specifying the position of the edge portion of a strip-shaped article relative to a reference point or a reference line or a reference plane.

[0012] This problem is solved by the subject matter of claims 1, 2, 3, and 7. Preferred embodiments are described in the dependent claims and will be explained in detail in the following description.

[0013] The idea underlying the present invention is to further improve the measurement roll known from European Patent Application Publication No. 3009206 so that the measurement roll has · a measurement roll body having a circumferential surface, · at least one recess in the measurement roll body, · at least one beam arranged in the recess and extending along the longitudinal axis, and · a force sensor arranged in the recess, It has a beam that is supported above the force sensor inside the recess, the measuring roll body extends along the axis of rotation, the longitudinal axis of the beam does not extend parallel to the axis of rotation of the measuring roll body, and the longitudinal axis of the beam does not extend within a plane extending perpendicular to the axis of rotation of the measuring roll body. Such a modified measuring roll is used to relatively specify the position of the edge of the strip-shaped article with respect to a reference point, reference line, or reference plane when the strip-shaped article is guided through the measuring roll, or to implement a method for specifying the position of the edge by such a measuring roll.

[0014] The longitudinal axis of the beam · does not extend parallel to the axis of rotation of the measuring roll body and · does not extend within a plane extending perpendicular to the axis of rotation of the measuring roll body As a result, the longitudinal axis of the beam extends inclined with respect to the axis of rotation of the measuring roll body and extends inclined with respect to a plane extending perpendicular to the axis of rotation of the measuring roll body. In such an inclined beam, when the strip-shaped article is guided through the measuring roll and the measuring roll rotates, it is possible to detect from the change in the force measured by the force sensor over a predetermined time at which point of the beam the strip-shaped article (hereinafter also referred to as the strip material) first contacts. Since the geometry of the beam is known, for example, the position of the beam relative to the edge of the measuring roll (relative to the end of the measuring roll body) is known, it is possible to calculate, for example, how far the point on the beam where the strip-shaped article first contacts is from the edge of the measuring roll (from the end of the measuring roll body). Since the strip-shaped article first abuts against the beam at the edge, the position of the edge relative to the edge of the measuring roll (relative to the end of the measuring roll body) can thus be obtained.

[0015] The "longitudinal axis" of a beam is understood to be the axis in the main direction along which the beam extends. In a rectangular beam having long edges extending parallel to each other and shorter side edges extending perpendicular to these long edges, the longitudinal axis is the axis at the center of the beam that extends parallel to the long edges of the rectangle. In a beam having a flat, rectangular bottom surface with long edges extending parallel to each other and side edges shorter than these long edges and extending perpendicular to these long edges, and a curved top surface suitable for aligning with the cylindrical outer surface of the measuring roll body, and which can close the gap created by the recess on the cylindrical outer surface of the measuring roll body (except for a small gap around the beam) when the beam is placed in the recess, the longitudinal axis is the axis at the center of the beam that extends parallel to the long edges of the rectangular bottom surface. The beam has a non-flat bottom surface and a curved top surface suitable for aligning with the cylindrical outer surface of the measuring roll body, and the top surface can close the gap created by the recess on the cylindrical outer surface of the measuring roll body (except for a small gap around the beam) when the beam is positioned in the recess, so as to create a closed cylindrical outer surface, and has two end faces, with the bottom and top surfaces extending from one end face to the other, the longitudinal axis is a line connecting a point on one end face, preferably the center point of one end face, to a point on the other end face, preferably the center point of the other end face. The end faces may be flat. If the beam is defined by a curved end face rather than a flat end face, the end face may be a curved surface, for example, a cylindrical subsurface.

[0016] In a preferred embodiment, the strip of material is guided through the measuring roll such that the outermost end of the beam (the end of the beam closer to the edge of the measuring roll) guides it when viewed in the direction of rotation of the measuring roll, and the measuring roll is rotated by the strip of material and / or a drive device guided through the measuring roll. In a preferred embodiment, the outermost region of the beam first contacts the strip of material, and then the innermost region of the beam contacts the strip of material.

[0017] In a preferred embodiment, the recess is a curved surface extending inward from the circumferential surface of the measuring roll body, preferably a recess extending inward from a cylindrical surface parallel to the circumferential surface of the measuring roll body. The recess may end with an opening on the circumferential surface of the measuring roll body, which is preferably closed by a beam or by a cover positioned radially above the beam. Alternatively, the recess may be closed by a material layer positioned radially outside the recess in the end state of the measuring roll. Such a material layer can be formed by a coating applied to the circumferential surface of a semi-finished measuring roll to form the finished measuring roll body. Furthermore, a known configuration involves covering the semi-finished measuring roll body with a cover tube, thereby closing the recess located within the semi-finished measuring roll body and ending with an opening on the circumferential surface of the semi-finished measuring roll body. The wall thickness of the cover tube is determined by the material layer present radially outside the recess. Another possible configuration involves a recess provided within the semi-finished measuring roll body, terminating at an opening on the circumferential surface of the semi-finished measuring roll body, and being closed by a cover. This recess is then closed by a coating applied to the circumferential surface of the semi-finished measuring roll body. The thickness of this coating is determined by the material layer present on the radially outer side of the recess.

[0018] In a preferred embodiment, multiple, preferably the majority (75% or more), cross-sections of the recesses have the same shape and / or size in a plane perpendicular to the radial direction of the measuring roll.

[0019] In a preferred embodiment, multiple, preferably the majority (75% or more), cross-sections of the recesses are • Extending perpendicular to the radial direction of the measuring roll, • Intersecting beams In a plane, it has the same shape as the beam. In a preferred embodiment, all cross-sections of the recess are • Extending perpendicular to the radial direction of the measuring roll, • Intersecting beams In a plane, it has the same shape as the beam. In a preferred embodiment, the recess has the same shape but is somewhat larger (for example, a cross-section that is 1% or 2% larger in each plane), thereby creating a uniform gap between the beam and the defining wall that defines the recess. The gap may be completely filled with sealant, not filled at all, or partially filled.

[0020] In a preferred embodiment, the beam has a lower surface located closer to the rotation axis of the measuring roll body and an upper surface located further outward relative to the lower surface in the radial direction of the measuring roll.

[0021] In a preferred embodiment, the beam is supported inside the recess on a first force sensor located within the recess and on a second force sensor located within the recess. In the context of the method according to the present invention, the position of the edge of a strip of article is determined relative to a reference point, reference line, or reference plane of the measuring roll body of the measuring roll from the measurement signal of the first force sensor and / or the measurement signal of the second force sensor.

[0022] In a preferred embodiment, the beam is supported on the inside of a recess, above the first and second force sensors, with its lower surface supported. The lower surface may be formed flat. The lower surface may have two steps, and the beam is supported on the steps of its lower surface above the first and second force sensors.

[0023] In a preferred embodiment, the beam has a first end and a second end opposite to the first end. In a preferred embodiment, the beam is supported on a first force sensor at the first end and on a second force sensor at the second end.

[0024] In a preferred embodiment, the upper surface of the beam is located on a curved surface, preferably on a cylindrical surface on which the circumferential surface of the measuring roll body is also located. In a preferred embodiment, the upper surface of the beam is located on a curved surface, preferably on a cylindrical surface positioned parallel to the curved surface, preferably parallel to the cylindrical surface on which the circumferential surface of the measuring roll body is located. However, the upper surface may be formed flat.

[0025] In a preferred embodiment, the upper and lower surfaces of the beam have the same cross-sectional shape. In a preferred embodiment, the upper and lower surfaces of the beam have the same cross-sectional shape and the same size. In a preferred embodiment, the upper and lower surfaces of the beam have the same cross-sectional shape and the same size and are aligned with each other. Embodiments are also possible in which the lower surface has the same cross-sectional shape as the upper surface but is smaller in size.

[0026] In a preferred embodiment, the measuring roll has a central plane extending perpendicular to the axis of rotation of the measuring roll body, and this central plane is located midway between a first end of the measuring roll body and a second end opposite the first end.

[0027] The advantages of the present invention are already obtained if the measuring roll has only one beam. In a preferred embodiment, the single beam has a first end located on one side of the central plane and a second end located on the opposite side of the central plane, opposite to the first end. That is, in this preferred embodiment, the single beam intersects across the central plane. In a preferred embodiment, the first end of the beam is located closer to the first end of the measuring roll body than to the central plane. Supplementarily or alternatively, in a preferred embodiment, the second end of the beam is located closer to the second end of the measuring roll body than to the central plane. In such embodiments, the positions of both edges of the strip material are already determined. By the progression of force measured by the force sensor over a predetermined time, • We can determine when the strip first made contact with the beam, and from this we can calculate the position of the first strip edge. This allows us to determine when the strip material made contact with the beam again, and thereby calculate the position of the second strip edge.

[0028] If the positions of both band edges are known, the band width can also be calculated as the distance between the two band edges.

[0029] The advantages of the present invention are particularly well obtained if the measuring roll has a first beam and a second beam. In a preferred embodiment, the first beam has a first end and a second end opposite to the first end, in which case the first and second ends of the first beam are located on one side of the central plane. In a preferred embodiment, the second beam has a first end and a second end opposite to the first end, in which case the first and second ends of the second beam are located on opposite sides of the central plane. In a preferred embodiment, neither the first nor the second beam intersects the central plane. In a preferred embodiment, The first end of the first beam is positioned closer to the first end of the measuring roll body than to the central plane. The second end of the first beam is positioned closer to the central plane than the first end of the first beam. The first end of the second beam is positioned closer to the second end of the measuring roll body than to the central plane. The second end of the second beam is positioned closer to the central plane than the first end of the second beam. The first end of the first beam and the first end of the second beam are positioned on a single line that extends parallel to the rotation axis of the measuring roll body.

[0030] In a preferred embodiment, the first beam and the second beam are formed mirror-image symmetrically with respect to the central plane.

[0031] An embodiment having a first beam on one side of the central plane and a second beam on the opposite side of the central plane can be used particularly well to determine the position of one band edge using the first beam and the position of the second band edge using the second beam. If the positions of both band edges are known, the band width can also be calculated as the distance between the two band edges.

[0032] Embodiments with more than two beams are also possible. Preferably, in this embodiment, each pair of beams is combined into a pair consisting of a first beam and a second beam, and preferably, the first and second beams of a pair are formed mirror-image symmetrically with respect to the central plane. In a preferred embodiment, the first pair is spaced apart from the second pair in the circumferential direction. Resolution can be increased by increasing the number of pairs. The more pairs that are arranged circumferentially on the measuring roll body, the more frequently the belt edge position can be determined per rotation of the measuring roll.

[0033] The advantages of the present invention can already be realized with just one force sensor in a recess in which a beam is supported. Experiments have shown that partial overlap of the beam, such as that which occurs when the strip material is positioned on the beam so that the strip edge is guided through the beam, can be calculated from the signal of just one force sensor, and the degree of partial overlap can also be calculated, thereby allowing the position of the strip edge on the beam, and consequently the position of the strip edge on the measuring roll, to be calculated.

[0034] In an embodiment where only one force sensor is provided in a recess in which a beam is supported, the beam may be supported only on the force sensor and not elsewhere. Therefore, apart from the support on the force sensor, in this embodiment the beam is formed to vibrate freely. In an alternative embodiment, the beam is supported on only one force sensor and has at least one second mounting point on a step in the recess. Preferably, in this embodiment the beam has only two mounting points, namely one on the force sensor and the other on the single mounting point on the step in the recess.

[0035] Embodiments are also possible in which the beam is supported on three or more force sensors within the recess.

[0036] In a preferred embodiment, the longitudinal axis of the beam extends into a plane that is positioned at an angle of 10° to 80°, preferably 15° to 75°, preferably 15° to 50°, preferably 20° to 45°, and preferably 30° to 60° with respect to the plane containing the axis of rotation.

[0037] In preferred embodiments, the cross-section of the beam is rectangular in shape, but not square, in a plane that includes or extends parallel to the longitudinal axis of the beam. Embodiments are possible in which the beam is substantially rectangular, but its ends are rounded by semicircles. This allows for the formation of a recess that has rounded ends and no corners that pose a risk of cracking, in embodiments in which the recess has the same cross-sectional shape as the beam.

[0038] In a preferred embodiment, the beam is • Multiple planes intersecting the longitudinal axis of the beam and extending perpendicular to the radial direction of the measuring roll, preferably the majority of the planes, • Mirror-image symmetric with respect to a plane that intersects the longitudinal direction of the beam, and / or includes the radial direction of the measuring roll and the longitudinal direction of the beam. • Mirror-symmetric with respect to a plane that intersects the longitudinal direction of the beam, includes the radial direction of the measuring roll, and extends perpendicular to the longitudinal direction of the beam. It has a cross-section.

[0039] In a preferred embodiment, the length of the beam from the first end to the second end corresponds to at least 5%, preferably at least 10%, preferably at least 15%, preferably at least 20%, and preferably at least 30% of the longest length of the measuring roll body along a line parallel to the rotation axis of the measuring roll body.

[0040] The beam is preferably secured by a tightening screw within a recess. In a preferred embodiment, one tightening screw is provided for each force sensor within the recess. In a preferred embodiment, each force sensor is formed in a ring shape, and the tightening screw is guided through the center of the ring. The head of the tightening screw is preferably mounted in a groove, particularly preferably in a groove corresponding to the cross-sectional shape of the head of the tightening screw, for example, in a circular groove or a hexagonal groove. The tightening screw allows for a preload to be applied to the force sensor. Furthermore, embodiments are possible in which the force sensor itself has threads for the tightening screw.

[0041] By use and by method according to the present invention, the position of the edge of a strip-shaped article is specified relative to a reference point, reference line, or reference plane. In a preferred embodiment, by use and by method according to the present invention, the position of the edge of a strip-shaped article is specified relative to a reference point, reference line, or reference plane of a measuring roll. However, by use and by method according to the present invention, it is also possible to have a configuration in which the position of the edge of a strip-shaped article is specified relative to a reference point, reference line, or reference plane of the equipment to which the measuring roll is assembled, such as the vertical center plane of a roll stand or reel. The reference point may be a point at the end of the measuring roll body. The reference line may be a line that encircles the measuring roll body once. The reference plane may be the plane on which the end of the measuring roll body is located. The reference plane may be the center plane.

[0042] The use of a measuring roll for determining the position of a strip edge, as proposed by the present invention, can already be carried out by a single measuring roll containing one or more beams. Within the scope of the present invention, only the position of the strip edge can be determined by the measuring roll. However, within the scope of the present invention, the same measuring roll can also measure the position of the strip edge, the strip width (obtained from the distance from one strip edge to the other strip edge), and other characteristics of the strip article, such as the flatness or tension of the strip article. In a preferred embodiment, within the scope of use proposed by the present invention, a measuring roll is used that has another recess with another force sensor in addition to the one or more beams provided by the present invention. The force sensor in the other recess is used, for example, for determining flatness and / or determining tension. For use according to the present invention, an existing measuring roll equipped for determining flatness and / or tension can be re-equipped to additionally provide one or more beams provided by the present invention and one or more recesses provided for these beams.

[0043] Therefore, the present invention also proposes a measuring roll suitable for detecting the properties of a strip-shaped article, particularly a metal strip, which is guided through the measuring roll, • Measuring roll body having a circumferential surface, • At least one recess in the measuring roll body having a first cross-sectional shape, · At least one beam positioned within a recess, extending along the longitudinal axis, and • A first force sensor located within the recess, The measuring roll body has a beam supported on a first force sensor inside a recess, the measuring roll body extends along the axis of rotation, the longitudinal axis of the beam does not extend parallel to the axis of rotation of the measuring roll body, the longitudinal axis of the beam does not extend in a plane perpendicular to the axis of rotation of the measuring roll body, and at least one additional recess is provided inside the measuring roll body, in which a second force sensor is located, and this additional recess has a second cross-sectional shape different from the first cross-sectional shape.

[0044] In a preferred embodiment, the cross-sectional shape of the other recess is circular.

[0045] In a preferred embodiment, another recess is a hole extending axially, i.e., parallel to the axis of rotation, such as the recess disclosed in German Patent No. 10207501. A plurality of other recesses, each containing a plurality of force sensors, may be provided.

[0046] In a preferred embodiment, another recess is a radially extending hole, formed, for example, as a recess known in German Patent Application Publication No. 4236657. Multiple other recesses, each containing a multiple force sensor, may be provided.

[0047] The present invention further proposes a measuring roll for detecting the properties of a strip-shaped article, particularly a metal strip, which is guided through the measuring roll, and this measuring roll is • Measuring roll body having a circumferential surface, • At least one recess in the measuring roll body, • Force sensor located in the recess, and It has a cover that at least partially closes the recess and is located above the force sensor when viewed radially on the measuring roll body, In this case, the measuring roll body has a rotation axis, in this case, The cover and / or the force sensor and / or the intermediate member positioned between the cover and the force sensor have an outer surface whose geometric shape is formed mirror-image symmetric with respect to a plane of symmetry containing the axis of rotation, but whose geometric shape is not formed mirror-image symmetric with respect to a plane extending perpendicular to the axis of rotation. or The cover and / or the force sensor and / or the intermediate member positioned between the cover and the force sensor have an outer surface whose geometric shape is formed mirror-image symmetric with respect to a plane of symmetry extending perpendicular to the axis of rotation, but whose geometric shape is not formed mirror-image symmetric with respect to a plane containing the axis of rotation. or The cover and / or the force sensor and / or the intermediate member positioned between the cover and the force sensor have outer surfaces whose geometric shape is not formed mirror-symmetric with respect to a plane extending perpendicular to the axis of rotation, nor mirror-symmetric with respect to a plane containing the axis of rotation.

[0048] The cover, intermediate member, and / or force sensor may have, for example, a triangular or quadrilateral outer surface, but may also have an outer surface with an odd number of angles, for example, a pentagon or heptagon, or may have an outer surface with a trapezoidal or parallelogram shape.

[0049] In a preferred embodiment, no intermediate member is provided between the cover and the force sensor, and therefore, the present invention is The cover and / or force sensor have an outer surface whose geometric shape is formed mirror-image symmetric with respect to a plane of symmetry containing the axis of rotation, but whose geometric shape is not formed mirror-image symmetric with respect to a plane extending perpendicular to the axis of rotation. or The cover and / or force sensor have an outer surface whose geometric shape is formed mirror-image symmetric with respect to a plane of symmetry extending perpendicular to the axis of rotation, but whose geometric shape is not formed mirror-image symmetric with respect to a plane containing the axis of rotation. or The cover and / or force sensor have an outer surface whose geometric shape is not formed mirror-symmetric with respect to a plane extending perpendicular to the axis of rotation, nor mirror-symmetric with respect to a plane containing the axis of rotation. This is achieved by [doing something].

[0050] In a preferred embodiment, the cover extends along the longitudinal axis, and in a particularly preferred embodiment, the outer surface does not extend mirror-symmetrically with respect to a plane containing the longitudinal axis.

[0051] In a preferred embodiment, the force sensor extends along the longitudinal axis, and in a particularly preferred embodiment, the outer surface does not extend mirror-symmetrically with respect to a plane containing the longitudinal axis.

[0052] In a preferred embodiment, the intermediate member positioned between the cover and the force sensor extends along the longitudinal axis, and in a particularly preferred embodiment, the outer surface does not extend mirror-symmetrically with respect to a plane containing the longitudinal axis.

[0053] In a preferred embodiment, a tightening screw is provided, the head of which is positioned within a groove in the cover, and this tightening screw is screw-fixed to the bottom surface of the recess. Particularly preferred, each force sensor is formed in a ring shape, and the tightening screw is guided through the force sensor.

[0054] By shaping the outer surface of the cover and / or force sensor and / or intermediate member, if present, as proposed by the present invention, • The time course of the force sensor's measurement signal in an operating state where the cover is only covered up to the first part by the strip-shaped article. • The temporal progression of the force sensor's measurement signal in an operating state where the cover is only covered by a strip-shaped article up to a second part distinct from the first part. It was recognized that this allows for a clear distinction, and that this enables the calculation of the extent to which a strip-shaped item covers the cover by considering the passage of time.

[0055] In a preferred embodiment, the measuring roll body has a notch in which the molded body is located. In a preferred configuration, this notch is adjacent to a recess. In a particularly preferred embodiment, this notch has a bottom surface, preferably a flat bottom surface. In a particularly preferred embodiment, the recess opens to the bottom surface of the notch. In a preferred embodiment, the recess opens into the bottom surface, preferably in the middle of the bottom surface of the notch, spaced apart from the edge of the bottom surface. In a preferred embodiment, the recess extends further into the measuring roll body from the bottom surface of the recess as a starting point, preferably extending further radially into the measuring roll body.

[0056] In a preferred embodiment, the molded body is mounted in this notch and is preferably screw-fastened and / or glued.

[0057] In a preferred embodiment where the recess opens to the bottom surface of the notch, the cover that at least partially closes the recess is positioned within the recess and has an outer surface aligned with the bottom surface of the notch. In an alternative embodiment where the recess opens to the bottom surface of the notch, the cover that at least partially closes the recess has an outer surface formed further outward than the bottom surface of the notch when viewed radially from the measuring roll. In such an embodiment, the cover may be positioned entirely above and outside the recess, or it may protrude from the recess into the notch. In such an embodiment, the outer surface of the cover may be formed aligned with the circumferential surface of the measuring roll and / or aligned with the outer surface of the molded body positioned within the notch. It is also possible that the measuring roll body comprises a measuring roll body semi-finished product and a covering material mounted on the measuring roll body semi-finished product, and the outer surface of the cover is formed aligned with the circumferential surface of the measuring roll body semi-finished product and / or aligned with the outer surface of the molded body positioned within the notch.

[0058] In a notch, a cover positioned at least partially above the recess may have a dimension perpendicular to the radial direction of the measuring roll body, passing through the cover, preferably through the center of the cover, in the portion positioned above the recess and within the notch, which is smaller than the dimension in the same direction of the opening of the recess that opens into the bottom surface of the notch. In an alternative embodiment, a portion of the cover positioned outside the recess but inside the notch extends beyond the opening of the recess that opens into the bottom surface of the notch in at least one direction, preferably two opposing directions, and preferably three or more directions. In a preferred embodiment, if the cover is positioned only within the notch, the cover is not formed circularly. In a preferred embodiment where the cover is positioned partially within the recess and partially within the notch, preferably the portion of the cover positioned within the notch is not formed circularly.

[0059] In a preferred embodiment, two molded bodies are positioned within the notch. In a preferred embodiment, if an existing molded body fills the notch, or if a cover is provided that protrudes into the space of the notch, it fills the remaining space of the notch. In a preferred embodiment, each molded body has an outer surface that aligns with the circumferential surface of the measuring roll body or the circumferential surface of the semi-finished measuring roll body, for example, to complement the circumferential surface and form a closed cylindrical surface.

[0060] In a preferred embodiment, the recess opens into the bottom surface of the notch, and a single molded body is placed inside the notch, the molded body having a punch formed in the molded body, positioned above the cover, and preferably in contact with the cover. In a preferred embodiment, the punch is formed by a notch, preferably a ring-shaped notch in the molded body.

[0061] In a preferred embodiment, the cover is integrally formed with the molded body. The molded body may have a punch formed therein, which protrudes from above into the recess and contacts a force sensor located within the recess. In a preferred embodiment, the punch portion is separated from the inside of the molded body by a notch, preferably a ring-shaped notch.

[0062] In a particularly preferred embodiment, the molded body overlaps the recess that opens at the bottom surface of the notch. In a preferred configuration, the molded body overlaps the recess only slightly. In a preferred embodiment, the area of ​​the molded body that overlaps the recess is less than 30%, particularly preferably less than 20%, and particularly preferably less than 10%, of the area of ​​the recess opening within the bottom surface of the notch (the area of ​​the recess opening at the bottom surface).

[0063] In a preferred embodiment, the molded body and / or cover are formed as a coating layer, preferably as an independent component manufactured, for example, by 3D printing, as a coating layer.

[0064] According to the present invention, the cover at least partially closes the recess. In a preferred embodiment, the cover at least partially closes the recess by being at least partially, preferably completely, positioned within the recess. Preferably, the cover is positioned within the recess with an annular gap. Preferably, the shape of the recess corresponds to the cover.

[0065] Preferably, the recess is an opening region provided at least at the radially outer end of the recess, The opening has a geometric shape that is formed mirror-image symmetrically with respect to a plane of symmetry containing the axis of rotation, but that geometric shape is not formed mirror-image symmetrically with respect to a plane extending perpendicular to the axis of rotation. or The opening has a geometric shape that is formed mirror-image symmetrically with respect to a plane of symmetry extending perpendicular to the axis of rotation, but that geometric shape is not formed mirror-image symmetrically with respect to the plane containing the axis of rotation. or The opening has a geometric shape that is not formed symmetrically with respect to a plane extending perpendicular to the axis of rotation, nor symmetrically with respect to a plane containing the axis of rotation. It is formed.

[0066] The phrase "at least partially closing the recess" and the expression that the cover "at least partially closes the recess" means all embodiments in which the cover at least partially overlaps the recess, and in particular with the opening provided at the radially outer edge of the recess, in a line of sight along the radial direction of the measuring roll body. This is achieved in covers positioned within the recess. However, this is also achieved in covers positioned outside the recess, above the recess, for example, within a notch in the measuring roll body, and which are molded and positioned so as to at least partially overlap the recess, and in particular with the opening provided at the radially outer edge of the recess, in a line of sight along the radial direction of the measuring roll body.

[0067] The cover may be the aforementioned beam extending along the longitudinal axis and positioned within the recess. However, embodiments in which the cover is positioned outside the recess are also possible. In a preferred embodiment, an intermediate member is provided positioned between the cover and the force sensor. In a preferred embodiment, the intermediate member is in contact with the cover at one end and in contact with the force sensor at the opposite end, at least in a predetermined operating state. The intermediate member can transmit the pressing force applied to the cover to the force sensor.

[0068] The shape of the intermediate member, particularly its cross-sectional shape, can be adapted to the shape of the cover, particularly its cross-sectional shape, and an asymmetrical shape of the cover, particularly an asymmetrical cross-sectional shape, can be considered. In this case, embodiments are also possible in which the shape of the intermediate member, particularly its cross-sectional shape, deviates from the shape of the force sensor, particularly its cross-sectional shape. For example, the cover may have an asymmetrical cross-sectional shape, while the intermediate member and the force sensor may have symmetrical cross-sectional shapes.

[0069] The shape of the intermediate member, particularly its cross-sectional shape, can be adapted to the shape of the force sensor, particularly its cross-sectional shape, and an asymmetrical shape of the force sensor, particularly an asymmetrical cross-sectional shape, can be considered. In this case, embodiments are also possible in which the shape of the intermediate member, particularly its cross-sectional shape, deviates from the shape of the cover, particularly its cross-sectional shape. For example, the intermediate member and the force sensor may have asymmetrical cross-sectional shapes, while the cover may have a symmetrical cross-sectional shape.

[0070] Finally, embodiments are also possible in which the intermediate member has a cross-sectional shape different from that of the cover and different from that of the force sensor, particularly in terms of its cross-sectional shape. For example, the intermediate member may have an asymmetrical cross-sectional shape, while the cover and force sensor have symmetrical cross-sectional shapes.

[0071] The cross-sectional shapes described above in relation to the embodiments described above particularly relate to the cross-sectional shapes in a plane perpendicular to the radial direction of the measuring roll body.

[0072] In a preferred embodiment, the intermediate member is an independent element. However, embodiments in which the intermediate member is part of a body forming a cover are also conceivable. For example, an embodiment in which the body has a circular cross-sectional shape and an upper portion that functions as a cover, and this body has a lower portion that forms an intermediate member and whose cross-sectional shape is asymmetrically formed is conceivable. In a preferred embodiment, a body is provided having an upper portion that functions as a cover, and this body has a lower portion that forms an intermediate member and whose cross-sectional shape is asymmetrically formed, and therefore, The outer surface of the intermediate member facing the force sensor is provided such that its geometric shape is formed in a mirror image symmetry with respect to the plane of symmetry containing the axis of rotation, but not in a mirror image symmetry with respect to the plane extending perpendicular to the axis of rotation. or The outer surface of the intermediate member facing the force sensor is provided such that its geometric shape is formed in a mirror image symmetry with respect to a plane of symmetry extending perpendicular to the axis of rotation, but its geometric shape is not formed in a mirror image symmetry with respect to the plane containing the axis of rotation. or The outer surface of the intermediate member facing the force sensor is provided such that its geometric shape is not formed in a mirror image symmetric with respect to a plane extending perpendicular to the axis of rotation, nor in a mirror image symmetric with respect to the plane containing the axis of rotation.

[0073] In this specification, “coated layer” means a material coating, particularly one made of metal, which is first applied in a dotted, linear, or row-like and / or grid-like manner to form a three-dimensional object in the form of a single layer or multiple layers stacked on top of each other. In a coated layer, the currently applied layer may be firmly bonded to the layer below it, or to the measuring roll body if the currently applied layer is the first layer applied to the measuring roll body. Material coating can be performed layer by layer under computer control from one or more liquid or solid materials, according to predetermined dimensions and shapes. Physical or chemical curing or melting processes may be performed in the material coating. The coated layer can form a closed, substantially smooth surface. The coated layer may consist of only one layer. The single layer may be formed by applying it once in a dotted, linear, or row-like and / or grid-like manner. In such a configuration, no other layer is applied in a dotted, linear, or row-like and / or grid-like manner on top of the first layer formed in one step. However, in preferred embodiments, there is a layer structure consisting of multiple layers preferably manufactured sequentially. "Point-like" is understood to mean the coating of one layer or a portion of a layer by a single work step that does not involve relative motion along the circumferential surface of the measuring roll body. The expression "point-like" should not be understood as limiting the size of the layer or portion of the layer coated by this work step. "Point-like" also means the coating of a large area layer or a large area portion of a layer, if this work step is possible without relative motion along the circumferential surface of the measuring roll body.

[0074] In preferred embodiments, the coating layer is formed by 3D printing, laser beam melting (LBM), electron beam melting (EBM), laser powder coating welding, arc welding, wire-feed arc welding, thermal sputtering, cladding, wire laser cladding, powder bed processes, particularly preferably so-called "selective laser sintering" (SLS) or so-called "selective laser melting" (SLM), laser cladding (LMD), ultrafast laser cladding (EHLA), and / or surface brazing. This allows for layer coating by additive manufacturing based on a 3D model. Examples of additive manufacturing methods for producing the coating layer include free-jet binder coating, material coating by directional energy input, material extrusion, free-jet material coating, powder bed melting, lamination, bath-based photopolymerization, and combinations of the methods described above. This allows for the closure of recesses individually, or recesses including covers or beam and force sensors, at least partially, preferably completely. The above method offers the advantage that the material supply unit for the coating layer can be moved above the measuring roll body by a linear axis or robot. In this case, a mixture of materials or substantially one pure material can be used. Molten material generation is also possible. In particular, a molten material of the supplied material can be generated by a laser beam or electron beam, which is then applied onto the measuring roll body or onto a layer already provided on the measuring roll body. It may also be assumed that the material for the coating layer is supplied as a powder to the area where metal melting takes place by a protective gas or by wire feeding. In particular, the above method can implement joining principles, especially welding. This enables material connection.

[0075] In preferred embodiments, the coating layer comprises at least one weldable metal, at least one weldable alloy, and / or ceramic reinforcing particles. Appropriate selection of materials for the coating layer allows for adaptation to the requirements for the measuring roll and / or consideration of good thermal stability simultaneously with good manufacturability. Metals with high strength and toughness are particularly preferred. Iron, cobalt, nickel, chromium, molybdenum, vanadium and their alloys are particularly preferred, for example, chromium-molybdenum alloy (CrMo), e.g., 42CrMo4, or chromium-molybdenum-vanadium alloy (CrMoVa), e.g., 86CrMoV7, or e.g., tungsten-nickel-chromium alloy (WCNiCr).

[0076] In a preferred embodiment, the coating layer has layers of different compositions stacked on top of each other so as to take into account various requirements for the layer regarding its position on the measuring roll body. For example, one or more layers immediately above a recess may be made of the same or similar material as the measuring roll body, or may be formed from the same material. One or more layers above the coating layer located immediately above a recess may be made of a highly wear-resistant material. Silicon carbide, tungsten carbide, titanium carbide, tantalum carbide, and / or chromium carbide are particularly preferred.

[0077] In a preferred embodiment, the measuring roll body is formed as a layered structure.

[0078] The measuring roll according to the present invention has a measuring roll body. Preferably, the measuring roll body has a closed circumferential surface. In a preferred embodiment, the measuring roll body is a solid roll extending along the longitudinal axis. A solid roll means a measuring roll body that is integral and whose shape is manufactured by a primary forming method, e.g., casting, and / or whose geometric shape is manufactured from an integral semi-finished product by a separation method, in particular by machining, especially turning, drilling, milling, or grinding. In a preferred embodiment, in such a measuring roll body formed as a solid roll, the measuring roll journals, which are positioned on each end face of the measuring roll to rotatably support the measuring roll, for example by ball bearings, are also part of the integral body. However, a configuration is also conceivable in which the main part of the measuring roll body is formed as a cylindrical solid roll, and this solid roll has a cover positioned on its end face, with the measuring roll journals formed on the cover, as shown in Figure 2 of German Utility Model No. 202014006820, for example. Furthermore, the measuring roll body according to the present invention can be formed, for example, as the measuring roll body described in Figure 3 of German Utility Model No. 202014006820, in which case an integral journal is formed on the measuring roll body and a cover tube is placed over the measuring roll body. However, in a particularly preferred embodiment, the measuring roll does not have a cover tube and is formed as a solid roll. Embodiments in which the measuring roll body according to the present invention is formed from individual plates arranged adjacent to each other, as shown, for example, in German Patent No. 2630410, are also conceivable.

[0079] The measuring roll body of the measuring roll according to the present invention is provided with at least one recess. An advantage of the present invention has been shown to be that it can be obtained by a single recess provided in the measuring roll body. Therefore, when measuring flatness, it is conceivable that information about the flatness of a strip of article guided through the measuring roll is provided once per rotation of the measuring roll.

[0080] In a preferred embodiment, the measuring roll body has a plurality of recesses. In a preferred embodiment, these recesses are formed at the same radial intervals with respect to the longitudinal axis of the measuring roll body. In a preferred embodiment, all recesses are distributed equidistant from each other in the circumferential direction. However, particularly preferred embodiments include a first group of recesses distributed equidistant from each other in the circumferential direction at the same radial intervals with respect to the longitudinal axis, and additionally, at least one other recess is provided in addition to this first group of recesses, wherein the radial interval with respect to the longitudinal axis is different from that of the first group of recesses, and / or the other recesses do not have the same equidistant spacing in the circumferential direction as the other recesses have with respect to each other. Therefore, for example, with respect to flatness measurement, the measuring roll may be configured as a conventional measuring roll, such as a solid roll known in German Patent Application Publication No. 10207501, or a measuring roll known in German Patent Application Publication No. 102014012426. In this case, for the configuration according to the present invention, such a conventional measuring roll may be provided with another recess configured outside the pattern for performing, for example, another measurement.

[0081] In a preferred embodiment, the measuring roll has a bearing journal. In a preferred embodiment, the bearing journal is formed on the end face of the measuring roll, in an embodiment where the measuring roll has an end face.

[0082] In a preferred embodiment, the measuring roll body is formed in a cylindrical shape.

[0083] In a preferred embodiment, the force sensor has a sensor surface, in which case the force sensor can generate a sensor signal when the position of the sensor surface changes. A force sensor is called a force sensor because it is used to measure force, particularly preferably pressing force. To measure the force acting on the force sensor, the force sensor has a sensor surface and is formed to generate a sensor signal when the position of the sensor surface changes. The force sensor often has a reference system to which it belongs, and responds to changes in the position of the sensor surface in this reference system. Often, the force sensor has a casing. In this case, the reference system is often the casing. In such embodiments, the force sensor can detect, for example, whether the position of the sensor surface has changed relative to the casing. If the force sensor is formed as, for example, a piezoelectric force sensor, it has piezoelectric quartz, which can generate an electrical signal when the position of the piezoelectric quartz surface changes relative to the reference surface, for example, relative to an opposing surface of the piezoelectric quartz, for example, when the piezoelectric quartz is compressed. In force sensors formed as strain gauges, changes in the position of the force sensor's surface cause a change in the length of the measuring wire, or the measuring grid formed from the measuring wire, resulting in primarily stretching, but also partial compression. In force sensors formed as optical force sensors, the optical properties of the force sensor, such as refractive index or reflection properties, change with changes in the position of the surface.

[0084] The force sensor mounted according to the present invention has a sensor surface, and the positional change of the sensor surface of the force sensor is monitored in order to identify the force acting on the force sensor. One possible embodiment is that the sensor surface is the surface of an element whose properties change in order to generate a sensor signal, such as the surface of piezoelectric quartz itself. However, in many cases, such force sensors have an intermediate member on which the sensor surface is formed. Often, such an intermediate member is a rigid block, in which a change in the position of one surface of the rigid block directly leads to a change in the position of the opposing surface, based on the rigidity of the block. Such an intermediate member can be used to form the sensor surface so that it protrudes from the rest of the force sensor, particularly from the casing. The protruding sensor surface improves measurement accuracy because it forms a clearly defined surface on which the environment can act. The protruding sensor surface can, for example, avoid measurement errors due to force bifurcation. The force sensor according to the present invention can be formed, for example, as shown in German Patent Application Publication No. 1773551, and may have a piezoelectric element consisting of a multilayer crystal assembly positioned between two force transmission plates arranged within a single casing. In such embodiments, the sensor surface is the outer surface of the upper force transmission plate in Figure 1 of German Patent Application Publication No. 1773551 or the outer surface of the lower force transmission plate in Figure 1 of German Patent Application Publication No. 1773551.

[0085] In a preferred embodiment, the sensor surface is formed to be flat. In a preferred embodiment, the surface normal of the flat sensor surface of the first force sensor is oriented toward the circumferential surface.

[0086] In a preferred embodiment, the surface normal of the flatly formed sensor surface forms an angle of less than 45°, particularly preferably less than 20°, particularly preferably less than 10°, and particularly preferably less than 5° with respect to this radial line of the measuring roll body at a point on the sensor surface where the sensor surface intersects with the radial line of the measuring roll body.

[0087] In a preferred embodiment, the sensor surface of the force sensor used in the measuring roll according to the present invention is a flat surface.

[0088] In a preferred embodiment, the sensor surface is a surface that protrudes from other elements of the force sensor and is in contact with a cover that closes the recess to the circumferential surface.

[0089] In a preferred embodiment, at least two force sensors used in the measuring roll according to the present invention, particularly preferably some of the force sensors used in the measuring roll according to the present invention, particularly preferably all of the force sensors used in the measuring roll according to the present invention, are formed in the same form, and therefore, in the same type, particularly preferably identically.

[0090] In a preferred embodiment, the measuring roll has multiple force sensors, all located in a single recess. Particularly preferably, more than 5, more preferably more than 7, more preferably more than 10, and more preferably more than 15 force sensors are located in a single recess.

[0091] The measuring roll according to the present invention is particularly suitable for detecting the properties of a metal strip during cold rolling or hot rolling of the metal strip, especially for detecting the flatness of the metal strip. Further application areas may include, for example, re-rolling frames (skin pass frames), strip annealing lines, galvanizing lines, and further processing lines such as stretching and bending straightening equipment.

[0092] Next, the present invention will be described in more detail with reference to the illustrated embodiments. [Brief explanation of the drawing]

[0093] [Figure 1] This figure schematically shows a measuring roll to be used to determine the position of the band edge according to the present invention. [Figure 2] This diagram schematically shows the circumferential surface of the measuring roll body of a measuring roll, which is laid out on a single plane, and a strip-shaped object that travels on this circumferential surface. [Figure 3] This is a schematic diagram showing a cross-section of a part of the measuring roll and a recess formed within the measuring roll body, which contains a beam, a first force sensor, and a second force sensor positioned within the recess. [Figure 4] This figure shows one section of the diagram shown in Figure 2. [Figure 5] This is a plan view showing a portion of the circumferential surface of the measuring roll according to the present invention. [Figure 6] This figure shows a cross-section of a part of the measuring roll according to the present invention along line AA in Figure 5. [Figure 7] Figure 5 shows a cross-sectional view of a part of the measuring roll according to the present invention along the BB line. [Figure 8] This is a cross-sectional view showing a part of another embodiment of the measuring roll according to the present invention, which can be compared with the figure in Figure 6. [Figure 9] This is a schematic plan view showing the force sensor of the measuring roll. [Figure 10] This is a schematic plan view showing the intermediate member of the measuring roll and the force sensor. [Figure 11] This is a schematic plan view showing the intermediate member of the measuring roll and the force sensor. [Figure 12] This diagram schematically shows the forces acting on the measuring roll.

[0094] The measuring roll 1 used for measuring the belt edge position according to the present invention has a journal 2 as shown in Figure 1 and a measuring roll body 1a formed as a solid roll. The measuring roll body 1a has a rotation axis A, which is also the longitudinal axis A of the measuring roll body 1a.

[0095] The measuring roll body 1a is formed as a cylindrical body and has a circumferential surface 1b. The circumferential surface 1b of the cylindrical measuring roll body 1a is shown as an unfolded surface in Figure 2.

[0096] The embodiment shown in Figure 1 has two recesses 300. One beam 301 is positioned within each recess 300. Each beam 301 extends along a longitudinal axis 302. In the embodiment shown in Figure 1, each beam 301 is substantially rectangular in shape and has a semicircular end at its end; therefore, the end face of this beam 301 is a curved surface, i.e., a cylindrical subface. In the embodiment shown in Figure 2, the end face is a flat surface.

[0097] In the embodiment shown in Figure 1, a first force sensor 303 and a second force sensor 304 are arranged within each recess 300. Each beam 301 is supported inside the recess, above the first force sensor 303 and the second force sensor 304. Each longitudinal axis 302 of each beam 301 does not extend parallel to the rotation axis A of the measuring roll body 1a, nor does it extend in a plane perpendicular to the rotation axis A of the measuring roll body 1a. The beam 301 extends diagonally across the measuring roll body 1a.

[0098] Figure 1 shows the central plane 305 of the measuring roll body 1a. The central plane 305 extends perpendicularly to the rotation axis A of the measuring roll body 1a and is located in the middle between one end 306 of the measuring roll body 1a and the second end 307 opposite the first end 306.

[0099] The first beam 301 has a first end 308 and a second end 309 opposite the first end 308, in which case the first end 308 and the second end 309 of the first beam 301 are located on one side of the central plane 305. The second beam 301 has a first end 310 and a second end 311 opposite the first end 310, in which case the first end 310 and the second end 311 of the second beam 301 are located on the opposite side of the central plane 305. Neither the first beam 301 nor the second beam 301 intersects the central plane. The first beam 301 and the second beam 301 are formed as follows: The first end 308 of the first beam 301 is positioned closer to the first end 306 of the measuring roll body 1a than to the central plane 305. The second end 309 of the first beam 301 is positioned closer to the central plane 305 than the first end 308. The first end 310 of the second beam 301 is positioned closer to the second end 307 of the measuring roll body 1a than to the central plane 305. The second end 311 of the second beam 301 is positioned closer to the central plane 305 than the first end 310. The first end 308 of the first beam 301 and the first end 310 of the second beam 301 are positioned on a line 312 that extends parallel to the rotation axis A of the measuring roll body 1a.

[0100] The first beam 301 and the second beam 301 are formed in a mirror-image symmetric manner with respect to the central plane 305.

[0101] Figure 3 shows that the beam 301 has an upper surface 313 and a lower surface 314. The upper surface 313 is located further outward in the radial direction than the lower surface 314. The upper surface is cylindrical and is located on a curved surface 315 that extends parallel to the cylindrical circumferential surface 1b of the measuring roll body 1a.

[0102] Figure 3 shows, from above, the coating layer 316 applied to the upper surface 313 of the beam 301. The coating layer 316 closes the recess 300 and forms the closed circumferential surface 1b of the measuring roll body 1a. The coating layer 316 can be formed by additive manufacturing. The coating layer 316 can be formed by build-up welding. The coating layer 316 can be manufactured by a series of 3D prints, particularly preferably by a series of 3D prints of the entire measuring roll body 1a.

[0103] To determine the position of the strip edge 317 of the strip-shaped article 318 (strip material 318), the strip material 318 is guided via the measuring roll 1 so that it wraps around the measuring roll at a wrapping angle α (see Figure 12). The movement of the strip material 318 causes the measuring roll 1 to rotate about the rotation axis A. Additionally, a drive device can be provided to assist the rotation of the measuring roll 1 about the rotation axis.

[0104] Figures 2 and 4 partially show the strip 318. For clarity, the strip 318 is cut at the line where it first contacts the first beam 301 (contact point 319). In reality, the strip 318 extends further to the right in Figures 2 and 4 from the intersecting edge 320. The strip 318 is moved on the measuring roll 1 in the direction of arrow 321. This movement causes the strip 318 to rotate the measuring roll 1, also in the direction of arrow 321. As the measuring roll 1 rotates, the first beam 301 and the second beam 301 come into contact with the strip 318 once for each rotation of the measuring roll 1. Due to the inclined position of the beam 301, the position of the point where each beam 301 first contacts the strip material 318 per revolution (each contact point 319) depends on the position of the strip edge 317 relative to the central plane 305, the position of the strip edge 317 relative to the first end 306, or the position of the strip edge 317 relative to the second end 307. In the operating conditions shown in Figures 2 and 4, the upper strip edge 317 is further from the central plane 305 than the lower strip edge 317. The distance of the upper strip edge 317 to the first end 306 of the measuring roll body 1a is smaller than the distance of the lower strip edge 317 to the second end 307 of the measuring roll body 1a. Therefore, the distance between the contact point 319 of the upper band edge 317 on the first beam 301 and the first end 308 of the first beam 301 is smaller than the distance between the contact point 319 of the lower band edge 317 on the second beam 301 and the first end 310 of the second beam 301. In the operating conditions shown in Figures 2 and 4, the upper band edge 317 is in contact with the first beam 301, while the lower band edge 317 is not yet in contact with the second beam 301. The force sensor supporting the first beam 301 above has already emitted one signal. The force sensor supporting the second beam 301 above has not yet emitted a signal.

[0105] Figure 4 shows that the distance from the first end 306 of the measuring roll 1 to the strip edge 317 is given by the formula by = b - (ax / tan(BETA)) This indicates that it is calculated by, in this case, b = the axial distance between the points on the second end 309 of the beam 301 that are closest to the central plane 305; ax = the circumferential distance between the point on the second end 309 of the beam 301 that is closest to the central plane 305 and the contact point 319 (initial amplitude of the measurement signal); BETA = Angle between the roll axis and the beam That is the case.

[0106] The interval ax is calculated via a rotary encoder. A rotary encoder can also be used to decompose the force sensor signal with respect to the rotation angle. Therefore, it is possible to determine at what rotation angle the initial amplitude of the force sensor signal occurs. For example, if a table is stored showing what interval ax exists at what rotation angle, the value ax can be determined by monitoring the force sensor signal with respect to the rotation angle. By detecting the initial amplitude of the signal and outputting the rotation angle at which the initial amplitude occurs, the value ax corresponding to this rotation angle can be calculated using the rotation angle and a correspondence table between the rotation angle and ax.

[0107] Figure 1 shows that a measuring roll can be configured solely for determining the position of the strip edge and, if desired, the strip width. For such applications, the measuring roll 1 is equipped with only two beams 301.

[0108] Figure 2 shows that the beam 301 used to determine the position of the band edge can be combined with another force sensor in another recess, which can be used, for example, to determine flatness. Thus, Figure 2 shows the recesses 203 in the first row and the recesses 203 in the second row.

[0109] In the embodiments shown in Figures 1 and 2, the cover formed as the beam 301 has an outer surface whose geometric shape is not formed in a mirror image symmetric with respect to a plane extending perpendicular to the axis of rotation A, and also not formed in a mirror image symmetric with respect to a plane containing the axis of rotation.

[0110] Figure 5 shows a plan view of a portion of the outer surface of the measuring roll 1 according to the present invention. The measuring roll 1 has a notch 400. Two molded bodies 401 and 402 and a cover 403 are arranged in the notch 400. The cover 403 has a trapezoidal cross-sectional shape in the plan view of Figure 5, which corresponds to the plan view along the radial direction of the measuring roll body 1a. The cover is held in place by a fastening screw 404. The molded bodies 401 and 402 are held in place by a fixing screw 405. Figure 5 shows the rotation axis A of the measuring roll body 1a. Figure 5 shows the cover 403, The cover 403 has an outer surface whose geometric shape is not formed in a mirror image symmetric with respect to a plane extending perpendicular to the axis of rotation A, and also not formed in a mirror image symmetric with respect to a plane containing the axis of rotation A. This indicates that it is formed in such a way.

[0111] Figures 6 and 7 show that an intermediate member 407 is positioned between the cover 403 and the force sensor 406. The intermediate member 407 is formed in a stepped shape, but is formed symmetrically, i.e., circularly, within a cross-section perpendicular to the longitudinal axis of the fixing screw 404. The force sensor 406 is formed circularly with the longitudinal axis of the fixing screw 404 as its center.

[0112] Figure 6 shows that the molded bodies 401 and 402 protrude beyond the recess 408 of the measuring roll body 1a.

[0113] The notch 400 of the measuring roll body 1a has a flat bottom surface 409.

[0114] Figure 8 shows that the cover 403 and the molded bodies 401 and 402 may be an integral part of the main body. The main body may be provided with a punch 410 formed inside the main body, which is located above the intermediate member 407 and preferably in contact with the intermediate member 407. The punch 410 is formed inside the main body by an annular cutting portion 411.

[0115] Figure 9 shows a plan view of the force sensor 412, which is located in a recess (not shown in detail) similarly molded into the measuring roll body 1a. The rotation axis A is shown in Figure 9. The force sensor 412 has an outer surface whose geometric shape is not formed in a mirror image symmetric with respect to a plane extending perpendicular to the axis of rotation, and also not formed in a mirror image symmetric with respect to a plane containing the axis of rotation. This shows the configuration format.

[0116] Figure 10 shows a plan view of a force sensor 413 (circular, indicated by a dashed line) located in a recess (not shown in detail) similarly molded in the measuring roll body 1a. An intermediate member 414 is provided above the force sensor 413 and below the cover (not shown in Figure 10). The rotation axis A is shown in Figure 10. The intermediate member 414, positioned between the cover and the force sensor 413, has an outer surface whose geometric shape is formed mirror-image symmetrically with respect to a plane of symmetry containing the axis of rotation A, but whose geometric shape is not formed mirror-image symmetrically with respect to a plane extending perpendicular to the axis of rotation A. This shows the configuration format.

[0117] Figure 11 shows a plan view of a force sensor 415 (circular, indicated by a dashed line) located in a recess (not shown in detail) similarly molded in the measuring roll body 1a. An intermediate member 416 is provided above the force sensor 415 and below the cover (not shown in Figure 10). The rotation axis A is shown in Figure 11. The intermediate member 416, positioned between the cover and the force sensor 415, has an outer surface whose geometric shape is not formed in a mirror image symmetric with respect to a plane extending perpendicular to the axis of rotation A, and also not formed in a mirror image symmetric with respect to a plane containing the axis of rotation A. This shows the configuration format.

[0118] Figure 12 shows the force applied to the measurement roll 1 by the metal strip partially wound around the measurement roll 1 in the strip tension state. The quartz force sensor disposed in the recess of the measurement roll 1 generates an electric charge. This electric charge is directly proportional to the force applied to the quartz.

[0119] The strip elongation deviation, which is usually used to represent the flatness of the strip material and is usually measured in units of I-Unit, is calculated by the following relationship.

[0120] Local radial force N F , 5 , Z,i , , i , 2 , 5 , Local tensile force N F Z,i = F R,i / (2 × sin α / 2) α = Strip turning angle around the measurement roll Local tensile stress N / mm 2 σ Z,i = F Z,i / (b El × d) b El = Measurement area width d = Strip thickness Tensile stress deviation N / mm 2 Δσ Z,i = σ Z,max × σ Z,i σ Z,max = Maximum local tensile stress Strip elongation deviation μm / m ΔL / L i =(Δσ Z,i / E) × 10 6 [[ID=​​​​​​​​​​​​​​​​​​​​

[0121] example Quartz force sensor: Sensitivity = 4.2 pC / N Sensor charge: 210 pC Force applied to the sensor: F R,i =50N F Z,i =50 / (2×0.342 / 2)=146.19N α=20°σ Z,i =146.19 / (25×0.5)=11.69 N / mm 2 b El =25mm, d=0.5mm Δσ Z,i =20-11.69=8.3N / mm 2 σ Z,max = 20 N / mm 2 ΔL / L i =( Δσ Z,i / E)×10 6 = 162.34 μm / m E = Elastic modulus (Elastic modulus of steel = 2.06 × 10) 5 N / mm 2 ) ΔL / L i =( Δσ Z,i / E)×10 5 = 16.234 I-Unit

Claims

1. A measuring roll (1) for detecting a characteristic of a strip-like article (318), in particular a metal strip, guided through said measuring roll, said measuring roll comprising: A measuring roll body (1a) having a peripheral surface (1b); At least one recess (203, 300, 408) in the measuring roll body (1a); A force sensor (303, 304, 406, 412, 413, 415) disposed within the recess (203, 300, 408); a cover (403) which at least partially closes the recess (203, 300, 408) and is arranged above the force sensor (303, 304, 406, 412, 413, 415) as viewed in the radial direction of the measuring roll body (1a); It has The measuring roll body (1a) has a rotation axis (A), the cover and / or the force sensor and / or an intermediate part (414) arranged between the cover and the force sensor (413) has an outer surface whose geometric shape is formed mirror-symmetrically with respect to a symmetry plane containing the rotation axis, but whose geometric shape is not formed mirror-symmetrically with respect to a plane extending perpendicular to the rotation axis, or the cover and / or the force sensor and / or the intermediate piece arranged between the cover and the force sensor have an outer surface whose geometric shape is formed mirror-symmetrically with respect to a symmetry plane extending perpendicular to the axis of rotation, but whose geometric shape is not formed mirror-symmetrically with respect to a plane containing the axis of rotation, or the cover (403) and / or the force sensor (412) and / or an intermediate part (416) arranged between the cover and the force sensor (415) have an outer surface whose geometric shape is not formed mirror-symmetrically with respect to a plane extending perpendicular to the axis of rotation and is also not formed mirror-symmetrically with respect to a plane containing the axis of rotation, A measuring roll (1).

2. Use of a measuring roll (1) suitable for detecting a characteristic of a strip-like article (318), in particular a metal strip, guided through the measuring roll, said measuring roll comprising: A measuring roll body (1a) having a peripheral surface (1b); At least one recess (203, 300, 408) in the measuring roll body (1a); At least one beam (301) disposed within said recess (203, 300, 408) extending along a longitudinal axis (302); A force sensor (303, 304, 406, 412, 413, 415) disposed within the recess (203, 300, 408); wherein the beam (301) is supported on the force sensor (303, 304, 406, 412, 413, 415) inside the recess (203, 300, 408), the measuring roll body (1a) extends along a rotation axis (A), the longitudinal axis (302) of the beam (301) does not extend parallel to the rotation axis (A) of the measuring roll body (1a), and the longitudinal axis (302) of the beam (301) does not extend in a plane extending perpendicular to the rotation axis (A) of the measuring roll body (1a), and use of a measuring roll for determining the position of a strip edge (317) of the strip-shaped article (318) relative to a reference point or reference line or reference plane as the strip-shaped article (318) is guided through the measuring roll (1).

3. 1. A method for determining the position of a strip edge of a strip of an article relative to a reference point, line or plane as the article is guided through a measuring roll, comprising: The belt-shaped article is guided through the measuring roll, and the measuring roll includes: A measuring roll body (1a) having a peripheral surface (1b); At least one recess (203, 300, 408) in the measuring roll body (1a); At least one beam (301) disposed within said recess (203, 300, 408) extending along a longitudinal axis (302); A force sensor (303, 304, 406, 412, 413, 415) disposed within the recess (203, 300, 408); the beam (301) is supported on the force sensor (303, 304, 406, 412, 413, 415) inside the recess (203, 300, 408), the measuring roll body (1a) extends along a rotation axis (A), the longitudinal axis (302) of the beam (301) does not extend parallel to the rotation axis (A) of the measuring roll body (1a), the longitudinal axis (302) of the beam (301) does not extend in a plane extending perpendicular to the rotation axis (A) of the measuring roll body (1a), Guide the strip-shaped article (318) through the measuring roll (1) so that the strip edge (317) of the strip-shaped article (318) reaches a position above the beam (301) in the radial direction of the measuring roll body (1a) once during one rotation of the measuring roll (1); determining a position of the edge portion (317) of the strip-shaped article (318) relative to a reference point, line or plane from the measurement signals of the force sensors (303, 304, 406, 412, 413, 415); method.

4. 4. The use according to claim 2 or the method according to claim 3, wherein the measuring roll (1) has a first force sensor (303) arranged in the recess (300) and a second force sensor (304) arranged in the recess (300), and the beam (301) is supported inside the recess (300) on the first force sensor (303) and on the second force sensor (304).

5. 3. The use according to claim 2, the method according to claim 3 or the measuring roll according to claim 1, wherein a coating layer is formed above the recess (203, 300, 408).

6. 3. The use according to claim 2, the method according to claim 3 or the measuring roll according to claim 1, wherein the measuring roll body (1a) has a coating material.

7. A measuring roll suitable for detecting a characteristic of a strip-like article (318), in particular a metal strip, guided through the measuring roll (1), said measuring roll comprising: A measuring roll body (1a) having a peripheral surface (1b); At least one first recess (300) in the measuring roll body (1a) having a first cross-sectional shape; At least one beam (301) disposed within the first recess (203, 300, 408) extending along a longitudinal axis (302); A force sensor (303, 304, 406, 412, 413, 415) disposed within the recess (203, 300, 408); wherein the beam (301) is supported on the force sensor (303, 304, 406, 412, 413, 415) inside the first recess (203, 300, 408), the measuring roll body (1a) extends along a rotation axis (A), the longitudinal axis (302) of the beam (301) does not extend parallel to the rotation axis (A) of the measuring roll body (1a), and the longitudinal axis (302) of the beam (301) does not extend in a plane extending perpendicular to the rotation axis (A) of the measuring roll body (1a), A measuring roll, characterized in that at least one further recess (203) is provided in the measuring roll body (1a), a second force sensor (304) is arranged in the further recess (203), and the further recess (203) has a second cross-sectional shape different from the first cross-sectional shape.

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