Measuring roller for determining a property of a strip-like product guided over the measuring roller

Abstract

The invention relates to a measuring roller for determining a property of a strip-like product, in particular metal strip, guided over the measuring roller, wherein: the measuring roller comprises a measuring roller body (4) extending along a rotational axis and having a circumferential surface (6); the measuring roller comprises at least one recess (8); the at least one recess (8) extends from the circumferential surface (6) into the interior of the measuring roller body (4); the measuring roller comprises at least one support body (10); the at least one support body (10) is arranged in the at least one recess (8); the at least one support body (10) comprises at least one measuring region (12); the at least one measuring region (12) is arranged on at least one force sensor (14); the at least one support body (10) comprises at least one material weakening (16); the at least one measuring region (12) is delimited at least partially by the at least one material weakening (16).

Description

[0001] MEASURING ROLLER FOR DETERMINING A PROPERTY OF A STRIP-LIKE MATERIAL GUIDED OVER THE MEASURING ROLLER

[0002] FIELD OF THE INVENTION

[0003] The invention relates to a measuring roller for determining a property of a strip-shaped material, in particular a metal strip, guided over the measuring roller.

[0004] STATE OF THE ART

[0005] Measuring rollers for determining a property of a strip-shaped material guided over the measuring roller, in particular metal strip, are used in the cold and hot rolling of metal strip in order to determine flatness defects in the strip-shaped material.

[0006] For this purpose, the measuring roller comprises a measuring roller body extending along a rotational axis and having a circumferential surface, wherein the measuring roller comprises at least one recess. The at least one recess extends from the circumferential surface into the interior of the measuring roller body, wherein the measuring roller comprises at least one measuring region, wherein the at least one measuring region is arranged on at least one force sensor.

[0007] When measuring flatness, the strip material is guided over at least one measuring area at a specific wrap angle during rolling. The contact forces measured by at least one force sensor can be used to determine the strip tensile stress distribution and thus strip defects such as waviness.

[0008] To ensure the most accurate measurement possible using the force sensors, a force shunt between the measuring roller body and at least one measuring area should be minimized as far as possible.

[0009] Therefore, it is known from the prior art that the at least one measuring area is separated from the measuring roller body by a circumferential gap. This prevents force transmission from the measuring roller body to the measuring area from influencing the measurement.

[0010] Although the circumferential gap can prevent force shunting, foreign matter such as oil, grease, and / or metal chips from the strip material can enter the circumferential gap during rolling. This can impair the function of the at least one measuring range and the at least one force sensor, resulting in inaccurate measurements. Furthermore, the circumferential gap can leave an imprint on the strip material, reducing its quality.

[0011] To prevent the ingress of foreign matter, at least one measuring area, and in particular the measuring roller body, is covered. For this purpose, the circumferential gap can be covered or sealed with an O-ring, a plastic coating, a cover cap, or a welded layer. While this can reduce the ingress of foreign matter into the circumferential gap, covering or sealing the circumferential gap creates a force shunt, and the circumferential gap can still leave marks on the strip-shaped material.

[0012] Based on this prior art, the object of the present invention is to provide a reliable measuring roller that enables precise measurement while minimizing marks and force shunts.

[0013] SUMMARY OF THE INVENTION

[0014] The above-mentioned object is achieved according to a first aspect by a measuring roller for determining a property of a strip-shaped material, in particular of metal strip, guided over the measuring roller, wherein the measuring roller comprises a measuring roller body extending along a rotational axis and having a circumferential surface, wherein the measuring roller comprises at least one recess, wherein the at least one recess extends from the circumferential surface into the interior of the measuring roller body, wherein the measuring roller comprises at least one carrier body, wherein the at least one carrier body is arranged in the at least one recess, wherein the at least one carrier body comprises at least one measuring region, wherein the at least one measuring region is arranged on at least one force sensor, wherein the at least one carrier body comprises at least one material weakening,wherein the at least one measuring range is at least partially limited by the at least one material weakening.,

[0015] This allows for a measuring roller that can measure particularly reliably and precisely. Furthermore, at least one measuring point is not surrounded by a circumferential gap, preventing marks on the strip-shaped material from the measuring area. Furthermore, force shunts are minimized.

[0016] Determining a property can in particular be the determination of the flatness and / or the strip edge of the strip-shaped material.

[0017] The measuring roller comprises a measuring roller body. In a preferred embodiment, the measuring roller body can be a solid roller that can extend along the axis of rotation. A solid roller can be understood to mean a measuring roller body that can be made in one piece and whose shape can be produced either using a primary forming process, for example casting, and / or whose geometric shape can be produced from a one-piece semi-finished product by separating processes, in particular by machining, in particular by turning, drilling, milling, or grinding. Additionally or alternatively, the solid roller can also be produced entirely or in parts (in particular in layers) by applying layers, as described in particular in WO 2020 / 174001 A1.

[0018] In a preferred embodiment, in a measuring roller body designed as a solid roller, the measuring roller pins arranged on the front side of the measuring roller for rotatably supporting the measuring roller, for example in ball bearings, can also be part of the one-piece body. However, designs such as those shown in Fig. 2 of DE 20 2014 006 820 U1 are also conceivable, in which the main part of the measuring roller body can be designed as a cylindrical solid roller, which can have covers arranged on the front side, on which the measuring roller pins can be formed. Furthermore, the measuring roller body can be designed, for example, like the measuring roller body shown in Fig. 3 of DE 20 2014 006 820 U1, in which the measuring roller body can be designed with molded-on pins and a casing tube can be pushed over the measuring roller body.In a particularly preferred embodiment, however, the measuring roller may not have a jacket tube, but may be designed as a solid roller.

[0019] The peripheral surface of the measuring roller body can be the outer surface of the measuring roller body. The peripheral surface can be the surface of the measuring roller body that comes into contact with the strip-shaped material during the measurement.

[0020] The at least one recess can be a material removal area from the measuring roller body. The at least one recess extends from the circumferential surface into the interior of the measuring roller body. Thus, the at least one recess can extend from the circumferential surface to the central axis. Preferably, the recess can end in front of the central axis, starting from the circumferential surface. The recess can extend in the circumferential direction and in the direction of the rotation axis.

[0021] The at least one support body can be a supporting structure. The at least one support body can support the at least one measuring area. The at least one measuring area can, in particular, be completely surrounded by the at least one support body. As a result, no direct force can be transmitted from the measuring roller body to the at least one measuring area. Rather, any force must be transmitted from the measuring roller body to the at least one measuring area via the at least one support body. This allows the force shunt to be further minimized.

[0022] The at least one measuring area can be the area of ​​the measuring roller body in which a force measurement or a flatness measurement can take place. The at least one measuring area can be the only area of ​​the carrier body that can be moved by a radial force. Thus, force transmission during the flatness measurement can only take place in the measuring area. The at least one measuring area can have different shapes. The at least one measuring area can be circular, diamond-shaped, U-shaped, square, triangular or any other shape. The shape of the at least one measuring area can result in particular from the delimitation of the at least one material area by the at least one material weakening. Thus, the at least one material weakening can be arranged in a circular, diamond-shaped, U-shaped, square, triangular or other shape around the at least one measuring area.

[0023] The at least one force sensor can be designed to determine a force acting on the at least one measuring range. The at least one force sensor can, in particular, determine a force acting on the at least one measuring range through a radial movement of the at least one measuring range. The at least one force sensor can be arranged centrally or at the edge of the at least one measuring range. If the at least one force sensor can be arranged centrally in the at least one measuring range, the at least one force sensor can be evenly spaced from all boundaries of the at least one measuring range. For example, the at least one force sensor can be evenly spaced from several material weakenings. If the at least one force sensor can be arranged at the edge of the at least one measuring range, the at least one force sensor can be arranged closer to a boundary of the at least one measuring range.For example, the at least one force sensor can be arranged closer to one of several material weakenings. In particular, the at least one measuring range can be arranged across at least two, three, or four force sensors.

[0024] The at least one material weakening can have a lower strength than the at least one measuring area. The material weakening can greatly minimize a force shunt between the at least one measuring area and the measuring roller body. The at least one material weakening can, in particular, have a different strength, a different thickness, a different alloy and / or a different microstructure than the at least one measuring area. A different thickness of the at least one material weakening can, for example, be a smaller thickness than the thickness of the at least one measuring area. In this way, the at least one material weakening can be produced particularly easily. The at least one material weakening can be introduced on the inside of the at least one carrier body. The inside of the at least one carrier body is the side of the at least one carrier body facing the axis of rotation.

[0025] The at least one measuring range is at least partially delimited by the at least one material weakening. The at least one measuring range can thus be completely or only partially decoupled from the carrier body. The at least one measuring range can, for example, be completely delimited by only one circular material weakening. The at least one measuring range can, for example, be only partially delimited by only one semicircular material weakening. The at least one measuring range can, for example, be partially delimited by three material weakenings, wherein the three material weakenings can be arranged in a U-shape. The at least one measuring range can, for example, be completely delimited by four material weakenings, wherein the material weakenings can form a rhombus.

[0026] According to a first embodiment, the at least one material weakening can be produced by milling, drilling and / or sinking EDM, and / or the at least one material weakening can be produced by a 3D printing process.

[0027] In this way, the material weakening can be produced particularly easily and reliably. The at least one material weakening can have a smaller thickness than the at least one carrier body and / or the at least one measuring area. Milling, drilling and / or die-sinking can offer the advantage that the at least one carrier body, the at least one measuring area and the at least one material weakening can be produced from solid material, so that the material properties can be homogeneous. In the 3D printing process, the at least one material weakening can be produced as a particularly delicate structure and the material properties can be varied using the process parameters. The properties of the measuring roller can therefore be varied to a greater extent.

[0028] According to a further embodiment, the at least one material weakening can be at least partially tilted relative to the circumferential direction and / or the rotation axis.

[0029] If the at least one material weakening can be at least partially tilted relative to the circumferential direction and / or the rotational axis, the strip edge can be determined using the at least one measuring range. This allows the positions of flatness defects to be reliably determined relative to the strip edge. This makes the measurement with the measuring roller more precise.

[0030] The at least one material weakening can extend at least partially tilted relative to the circumferential direction and / or the rotation axis. This means that the at least one material weakening can have a tangent that can extend tilted relative to the circumferential direction and / or the rotation axis. For example, in the case of a circular material weakening, part of the material weakening can extend tilted relative to the circumferential direction and / or the rotation axis.

[0031] According to a further embodiment, the at least one material weakening 30 can run at least partially parallel to the circumferential direction and / or to the rotation axis.

[0032] In this way, the at least one material weakening, and thus the entire measuring roller, can be manufactured easily. The at least one material weakening can run at least partially parallel to the circumferential direction and / or the rotational axis, which can mean that the at least one material weakening can have a tangent that can run parallel to the circumferential direction and / or the rotational axis. For example, in the case of a circular material weakening, part of the material weakening can run parallel to the circumferential direction and / or the rotational axis. A linear material weakening can run parallel to the circumferential direction and / or the rotational axis.

[0033] According to a further embodiment, the at least one force sensor can be designed as a piezoelectric force sensor, wherein the at least one force sensor can be connected to the at least one measuring area and the measuring roller body, in particular in a force-locking manner.

[0034] In this way, the force acting on the at least one measuring area can be determined particularly precisely. In this case, a radial position change of the at least one measuring area can be reliably determined via the at least one piezoelectric force sensor. If the at least one force sensor can be connected to the at least one measuring area and the measuring roller body, in particular in a force-fitting manner, the measurement can be particularly precise. The at least one force sensor can be used to measure forces, in particular preferably compressive forces. In order to measure the force acting on the at least one force sensor, the at least one force sensor can be designed such that it can have a sensor surface and can generate a sensor signal when the position of the sensor surface changes. The at least one force sensor can usually have an associated reference system and can react to changes in the position of the sensor surface in this reference system.The at least one force sensor can often have a housing. The reference system can then be the housing. In such an embodiment, the at least one force sensor can, for example, determine whether the position of the sensor surface may have changed relative to the housing. If the at least one force sensor can be designed as a piezoelectric force sensor, for example, the at least one force sensor can have a piezoelectric quartz crystal that can generate an electrical signal if the position of one of its surfaces can be changed relative to a reference surface, for example an opposite surface of the piezoelectric quartz crystal, for example if the piezoelectric quartz crystal can be compressed. If the at least one force sensor can be designed as a strain gauge, the length of the measuring wire or the like can be determined by a change in the position of the surface of the at least one force sensor.The measuring grid formed from measuring wires can be changed, usually stretched, but sometimes also compressed. If the at least one force sensor can be designed as an optical force sensor, the optical properties of the at least one force sensor, for example the refractive index or the reflection properties, can be changed by changing the position of the surface. The at least one force sensor can use infrared, for example. Alternatively, the at least one force sensor can use radar. If the at least one force sensor can use infrared or radar, the at least one force sensor can advantageously be introduced into the measuring roller without a frictional connection.

[0035] According to a further embodiment, the at least one carrier body can comprise at least one support structure, wherein the at least one measuring region can be at least partially connected to the at least one support structure via the at least one material weakening, and / or wherein the at least one measuring region can have a lower strength, in particular a lower thickness, than the at least one support structure.

[0036] If the at least one measuring area can be at least partially connected to the at least one support structure via the at least one material weakening, the at least one measuring area and thus also the measuring roller can measure the strip-shaped material particularly precisely, since the at least one support structure can stabilize the at least one measuring area and shield it from other force influences. At the same time, the at least one measuring area can be decoupled from the at least one support structure due to the at least one material weakening, so that no force can be transmitted from the at least one support structure to the at least one measuring area. Consequently, a very precise and reliable measurement is achieved.If the at least one measuring area can have a lower strength, in particular a 20 smaller thickness, than the at least one support structure, the at least one support structure can stabilize the at least one measuring area, while the at least one measuring area can measure forces particularly well due to the lower strength. The measuring roller can therefore measure particularly accurately. If the lower strength of the at least one measuring area compared to the support structure can be produced by a small thickness, the measuring roller can be manufactured particularly easily. If the at least one measuring area can have a smaller thickness than the at least one support structure, the at least one material weakening can have a smaller thickness than the at least one measuring area and than the at least one support structure.The different thicknesses of the at least one support structure, the at least one measuring area and / or the at least one material weakening can be achieved by a small amount of material being applied or a larger amount of material being removed on the inside of the at least one carrier body. In this way, the surface of the at least one carrier body can be smooth on the outside. The outside of the at least one carrier body can be the side of the carrier body that can come into contact with the strip-shaped product. In this way, impressions on the strip-shaped product can be prevented by the different thicknesses of the at least one support structure, the at least one measuring area and / or the at least one material weakening, while at the same time a precise measurement can be ensured.

[0037] The thickness of the at least one material weakening can be constant. This enables a particularly reliable measurement. If the thickness of the at least one material weakening can be constant, the remaining material thickness of the at least one material weakening can be constant in the circumferential direction and along the rotation axis. In other words, the distance between the outer surface and the inner surface of the at least one material weakening can be constant.

[0038] If the at least one measuring area can be at least partially connected to the at least one support structure via the at least one material weakening, and wherein the at least one measuring area can have a lower strength, in particular a lower thickness, than the at least one support structure, the measurement with the measuring roller can be particularly precise and accurate.

[0039] The at least one support structure can be a more stable structure than the at least one measuring area. The at least one support structure can carry the at least one measuring area. The at least one support structure can have a strength such that the at least one support structure cannot influence the measurement of the at least one measuring area. The at least one support structure can partially or completely surround the at least one measuring area. If the at least one support structure can completely surround the at least one measuring area, the measurement can be particularly precise and handling of the at least one carrier body can be particularly simple. This can also simplify production.According to a further embodiment, the at least one carrier body can rest on the bottom of the at least one recess, wherein in particular the at least one carrier body can be non-positively connected to the bottom of the at least one recess, in particular can be screwed.

[0040] In this way, the at least one carrier body can be mounted particularly stably, so that the measuring roller can measure particularly precisely. If the at least one carrier body can be force-fitted to the bottom of the at least one recess, the at least one carrier body can be particularly stable against forces in the circumferential direction and / or along the axis of rotation. As a result, the stability of the at least one carrier body and thus the precision of the measurement of the measuring roller can be very good. If the at least one carrier body can be screwed to the bottom of the at least one recess, the carrier body can be designed particularly simply and can be mounted stably. The measuring roller can therefore be designed particularly simply and be precise. In addition, the at least one carrier body can be removed or replaced particularly easily for repairs.

[0041] According to a further embodiment, the at least one carrier body can be designed to be flush with the circumferential surface of the measuring roller body.

[0042] In this way, marks on the strip-shaped material can be prevented or minimized. Furthermore, forces from the strip-shaped material can be measured with particular precision, since the at least one carrier body rests against the surface. The at least one carrier body can be aligned with the circumferential surface of the measuring roller body, meaning that the at least one carrier body and the at least one measuring area can be aligned with the circumferential surface of the measuring roller body.

[0043] Being aligned with the circumferential surface of the measuring roller body can mean that the surface of the circumferential surface and the surface of the at least one support body have the same radial distance from the rotation axis. Being aligned with the circumferential surface of the measuring roller body can mean that the measuring roller can have a circular cross-section with a constant radius in a cross-section transverse to the rotation axis through the circumferential surface and the at least one support body.

[0044] According to a further embodiment, the at least one carrier body can be welded to the measuring roller body, in particular with or without a welding filler material.

[0045] In this way, the surface can be sealed after insertion of the at least one carrier body, so that no foreign substances such as oils, greases and / or metal shavings from the strip-shaped material can get between the at least one carrier body and the measuring roller body. A welding filler material can be used to close a larger gap between the measuring roller body and the at least one carrier body. The measuring roller can be manufactured particularly easily without a welding filler material. According to a further embodiment, the at least one carrier body and / or the measuring roller body can be covered with a layer, wherein the layer is particularly applied by printing using a 3D printer, laser beam melting, electron beam melting, laser powder deposition welding, thermal spraying, deposition welding, deposition soldering, a wire laser deposition welding, a powder bed process, particularly preferably the so-called“Selective Laser Sintering” (SLS) or the so-called “Selective Laser Melting” (SLM), Laser Metal Deposition (LMD), Extremely High Speed ​​Laser Metal Deposition (EHLA) and / or Wire Feed Arc Welding.

[0046] By covering the at least one carrier body and / or the measuring roller body, an additional coating can be applied that improves the properties of the measuring roller, such as surface hardness. Furthermore, the uniform surface minimizes marks on the strip-shaped material. Furthermore, the coating can improve the abrasion and corrosion resistance of the measuring roller.

[0047] According to a further embodiment, the at least one carrier body can rest against the walls in the at least one recess in the circumferential direction.

[0048] In this way, the at least one carrier body can be mounted particularly stably in the at least one recess, so that the measuring roller can measure particularly precisely. The at least one carrier body can rest against the walls in the at least one recess in the circumferential direction, which can mean that the at least one carrier body rests flush against the walls of the recesses. The at least one carrier body can rest against the walls in the at least one recess in the circumferential direction, which can mean that the at least one carrier body closes the recess flush with the measuring roller body. Manufacturing tolerances during manufacture and installation of the at least one carrier body can limit the contact of the at least one carrier body in the at least one recess in the circumferential direction against the walls, so that a small gap can exist between the measuring roller body and the at least one carrier body.The size of the small gap can vary.

[0049] The walls can be the surface of the measuring roller body, which can form the recess and extend from the circumferential surface toward the rotation axis. The walls can end at the circumferential surface of the measuring roller body. The walls can extend in the radial direction.

[0050] According to a further embodiment, the measuring roller can comprise at least one frictional connection element, in particular a plate and / or a wedge, wherein the at least one frictional connection element can connect the at least one carrier body to the measuring roller body in a frictional connection, in particular in the circumferential direction.

[0051] This allows the at least one support body to be mounted particularly stably in the at least one recess, preventing any change in position of the at least one support body during measurement of the strip-shaped material. This allows the measuring roller to measure particularly precisely. If the frictional connection element can be a plate and / or a wedge, the at least one support body can be frictionally connected to the measuring roller body particularly easily. This allows the measuring roller to be designed particularly simply.

[0052] According to a further embodiment, the at least one carrier body can be arranged parallel or tilted to the axis of rotation.

[0053] If the at least one support body can be arranged parallel to the rotation axis, a large number of measurements can be performed side by side on the belt. This allows for particularly precise and high-resolution measurements with the measuring roller. If the at least one support body can be arranged tilted relative to the rotation axis, the belt can be partially measured at different rotation angles.

[0054] According to a further embodiment, the carrier body can comprise at least two measuring areas, wherein the at least two measuring areas can be separated by the at least one material weakening, so that the at least two measuring areas can carry out two independent and local measurements.

[0055] Since the two or more measuring areas can only be separated by at least one weakening of the material, multiple measurements can be performed directly next to each other using a single carrier. This allows for particularly precise measurements with the measuring roller.

[0056] The at least two measuring areas can be arranged side by side and separated only by at least one weakened portion of the material. This allows for particularly high-resolution and precise measurements.

[0057] Two independent and local measurements can mean that the two measurements do not influence each other and different points on the strip-shaped material can be measured simultaneously. This also allows two adjacent measuring points on the strip-shaped material to be measured simultaneously without mutual interference.

[0058] The above-mentioned object is achieved according to a second aspect by a method for producing a measuring roller according to the invention, in which a measuring roller is provided with a measuring roller body extending along a rotation axis and having a circumferential surface, in which at least one recess is introduced into the circumferential surface in the interior of the measuring roller body, in which at least one carrier body is arranged in the at least one recess.

[0059] The above-mentioned object is achieved according to a third aspect by a method for determining a property of a strip-shaped material guided over the measuring roller, in which a strip-shaped material is guided over the measuring roller according to the invention and in which a property of the strip-shaped material is determined. The above-mentioned object is achieved according to a fourth aspect by using a measuring roller according to the invention to determine a property of a strip-shaped material guided over the measuring roller.

[0060] Further objects, features, advantages, and aspects of the present invention will become apparent to those skilled in the art from the following description and the appended claims. However, it should be understood that the following description, the appended claims, and the specific examples showing preferred embodiments of the invention are given for illustrative purposes only. Various changes and modifications within the spirit and scope of the disclosed invention will be readily apparent to those skilled in the art upon reading the following.

[0061] DEFINITIONS

[0062] The following expressions generally have the meanings set out below, unless the context in which they are used indicates otherwise.

[0063] As used herein, the term "comprise," in addition to its literal meaning, includes and specifically refers to the terms "consist essentially of" and "consist of." Thus, the term "comprise" refers both to embodiments in which the subject matter "comprises" specifically listed elements and does not include any other elements, as well as to embodiments in which the subject matter "comprises" specifically listed elements and / or may include other elements. Likewise, the term "have" is to be understood as the term "comprise," which also includes and refers to the terms "consist essentially of" and "consist of."The expression "consist essentially of" refers, where possible, in particular to embodiments in which the article comprises, in addition to the specifically listed elements of which the article essentially consists, 20% or less, in particular 15% or less, 10% or less, or in particular 5% or less, of further elements.

[0064] FIGURES

[0065] Fig. 1 Schematic view of a measuring roller;

[0066] Fig. 2 View of the cross section of a measuring roller;

[0067] Fig. 3 schematic view of a section of a carrier body;

[0068] Fig. 4 schematic view of a section of a carrier body;

[0069] Fig. 5 schematic view of a section of a carrier body; Fig. 6 cross-sectional view of a measuring roller with carrier body;

[0070] Fig. 7 schematic view of the cross section of a measuring roller with four carrier bodies.

[0071] SPECIAL DESCRIPTION

[0072] Fig. 1 shows a schematic view of a measuring roller 2 for determining a property of a strip-shaped material, in particular of metal strip, guided over the measuring roller 2. The measuring roller 2 comprises a measuring roller body 4 extending along a rotation axis R and having a circumferential surface 6, wherein the measuring roller 2 comprises a recess 8. The recess 8 extends from the circumferential surface 6 into the interior of the measuring roller body 4. The measuring roller 2 comprises a carrier body 10, wherein the carrier body 10 is arranged in the recess 8. The carrier body 10 comprises at least one measuring region 12, wherein the at least one measuring region 12 is arranged on at least one force sensor 14. The carrier body 10 comprises at least one material weakening 16, wherein the at least one measuring region 12 is at least partially delimited by the at least one material weakening 16.

[0073] Fig. 2 shows a cross-sectional view of a measuring roller 2. The measuring roller 2 comprises a measuring roller body 4 extending along a rotation axis R and having a circumferential surface 6, wherein the measuring roller 2 comprises a recess 8. The recess 8 extends from the circumferential surface 6 into the interior of the measuring roller body 4. The measuring roller 2 comprises a carrier body 10, wherein the carrier body 10 is arranged in the recess 8. The carrier body 10 comprises at least one measuring region 12, wherein the at least one measuring region 12 is arranged on at least one force sensor 14. The carrier body 10 comprises at least one material weakening 16, wherein the at least one measuring region 12 is at least partially delimited by the at least one material weakening 16.

[0074] The carrier body 10 and the measuring roller body 4 are covered with a layer 19, wherein the layer 19 is produced by printing using a 3D printer, laser beam melting, electron beam melting, laser powder deposition welding, thermal spraying, deposition welding, deposition soldering, a wire laser deposition welding, a powder bed process, particularly preferably the so-called “Selective Laser Sintering” SLS or the so-called “Selective Laser Melting” SLM, the Laser Metal Deposition LMD, the Extremely High Speed ​​Laser Deposition Welding EH LA and / or

[0075] Arc welding with wire feed.

[0076] Fig. 3 shows a schematic view of a section of a carrier body 10. The view of the carrier body 10 is taken from the rotation axis R. The carrier body 10 comprises three visible measuring areas 12, each of which is arranged on a force sensor 14. The force sensors 14 are each arranged centrally in the measuring area 12. The carrier body 10 comprises six material weakenings 16, each of which is delimited by the material weakenings 16. The measuring areas 12 have the shape of a parallelogram. The material weakenings 16 are created by milling, drilling, and / or die-sinking.

[0077] Additionally or alternatively, the material weakenings 16 can be produced using the 3D printing process.

[0078] Some material weakenings 16 are tilted relative to the rotation axis R. Alternatively or additionally, the material weakenings 16 can be at least partially tilted relative to the circumferential direction U and / or the rotation axis R. Two material weakenings 16 run at least partially parallel to the rotation axis R. Additionally or alternatively, the material weakenings 16 can run at least partially parallel to the circumferential direction U.

[0079] The three force sensors 14 are designed as piezoelectric force sensors 14. The force sensors 14 are frictionally connected to the measuring areas 12 and the measuring roller body 4.

[0080] The carrier body 10 comprises a support structure 18. The measuring areas 12 are connected to the support structure 18 via the material weakenings 16. In addition, the measuring areas 12 have a lower strength due to a smaller thickness than the support structure 18.

[0081] Fig. 4 shows a schematic view of a section of a support body 10. The view of the support body 10 is taken from the rotation axis R. The support body 10 comprises a measuring area 12, wherein the measuring area 12 is arranged on three force sensors 14. The support body 10 comprises three material weakenings 16, wherein the measuring area 12 is delimited by the material weakenings 16. The measuring area 12 has the shape of a triangle.

[0082] Fig. 5 shows a schematic view of a section of a carrier body 10. The view of the carrier body 10 is based on the axis of rotation R. The carrier body 10 comprises three visible measuring areas 12, wherein the three measuring areas 12 are each arranged on a force sensor 14. The force sensors 14 are arranged here at the edge of the measuring area 12. The carrier body 10 comprises five material weakenings 16, wherein the three measuring areas 12 are at least partially delimited by the material weakenings 16. The measuring areas 12 are each delimited by a material weakening 16 parallel to the axis of rotation R and two parallel material weakenings 16, wherein the two parallel material weakenings 16 are arranged tilted to the axis of rotation R and to the circumferential direction U.

[0083] Fig. 6 shows a cross-sectional view of a measuring roller 2 with a carrier body 10.

[0084] The support body 10 rests on the bottom of the recess 8. The support body 10 is frictionally connected to the bottom of the recess 8. For this purpose, the support body 10 is screwed to the bottom of the recess 8. The support body 10 is aligned with the circumferential surface 6 of the measuring roller body 4.

[0085] The carrier body 10 is welded to the measuring roller body 4. The carrier body 10 can be welded to the measuring roller body 4 with or without a welding filler material.

[0086] The support body 10 rests against the walls 20 in the recess 8 in the circumferential direction U. The measuring roller 2 comprises a frictional connection element 22. The frictional connection element 22 is a wedge. Alternatively, the frictional connection element 22 can also be a plate. The frictional connection element 22 connects the support body 10 to the measuring roller body 4 in a frictional connection in the circumferential direction U.

[0087] As can be seen in Fig. 1, the carrier body 10 is arranged parallel to the rotation axis R. Alternatively, the carrier body 10 can be arranged tilted to the rotation axis R.

[0088] As can be seen in Fig. 3, the carrier body 10 comprises three measuring areas 12, wherein the measuring areas 12 are separated by the material weakenings 16, so that the measuring areas 12 perform independent and local measurements.

[0089] Fig. 7 shows a schematic cross-sectional view of a measuring roller 2 with four carrier bodies 10. The four carrier bodies 10 are each arranged offset by 90° from one another. The four carrier bodies 10 are each arranged in one of the four recesses 8. Each of the four carrier bodies 10 comprises at least one measuring area 12. Each measuring area 12 is arranged on a force sensor 14. Each carrier body 10 comprises material weakenings 16. The measuring areas 12 are delimited by the material weakenings 16.

Claims

PATENT CLAIMS:

1. A measuring roller (2) for determining a property of a strip-shaped material, in particular a metal strip, guided over the measuring roller (2), wherein the measuring roller (2) comprises a measuring roller body (4) extending along a rotational axis (R) and having a circumferential surface (6), wherein the measuring roller (2) comprises at least one recess (8), wherein the at least one recess (8) extends from the circumferential surface (6) into the interior of the measuring roller body (4), wherein the measuring roller (2) comprises at least one carrier body (10), wherein the at least one carrier body (10) is arranged in the at least one recess (8), wherein the at least one carrier body (10) comprises at least one measuring region (12), wherein the at least one measuring region (12) is arranged on at least one force sensor (14), characterized in that the at least one carrier body (10) comprises at least one material weakening (16),wherein the at least one measuring range (12) is at least partially limited by the at least one material weakening (16).

2. Measuring roller according to claim 1, characterized in that the at least one material weakening (16) is produced by milling, drilling and / or sinking EDM, and / or wherein the at least one material weakening (16) is produced by a 3D printing process.

3. Measuring roller according to claim 1 or 2, characterized in that the at least one material weakening (16) is at least partially tilted to the circumferential direction (U) and / or to the rotation axis (R).

4. Measuring roller according to one of claims 1 to 3, characterized in that the at least one material weakening (16) runs at least partially parallel to the circumferential direction (U) and / or to the axis of rotation (R).

5. Measuring roller according to one of claims 1 to 4, characterized in that the at least one force sensor (14) is designed as a piezoelectric force sensor (14), wherein the at least one force sensor (14) is connected to the at least one measuring area (12) and the measuring roller body (4), in particular in a force-fitting manner.

6. Measuring roller according to one of claims 1 to 5, characterized in that the at least one carrier body (10) comprises at least one support structure (18), wherein the at least one measuring area (12) is at least partially connected to the at least one support structure (18) via the at least one material weakening (16), and / or wherein the at least one measuring region (12) has a lower strength, in particular a lower thickness, than the at least one support structure (18).

7. Measuring roller according to one of claims 1 to 6, characterized in that the at least one carrier body (10) rests on the bottom of the at least one recess (8), wherein in particular the at least one carrier body (10) is non-positively connected to the bottom of the at least one recess (8), in particular is screwed.

8. Measuring roller according to one of claims 1 to 7, characterized in that the at least one carrier body (10) is aligned with the peripheral surface (6) of the measuring roller body (4).

9. Measuring roller according to one of claims 1 to 8, characterized in that the at least one carrier body (10) is welded to the measuring roller body (4), in particular with or without a welding filler material.

10. Measuring roller according to one of claims 1 to 9, characterized in that the at least one carrier body (10) and / or the measuring roller body (4) is covered with a layer (19), wherein in particular the layer (19) was produced by printing using a 3D printer, laser beam melting, electron beam melting, laser powder deposition welding, thermal spraying, deposition welding, deposition soldering, wire laser deposition welding, a powder bed process, particularly preferably the so-called “Selective Laser Sintering” (SLS) or the so-called “Selective Laser Melting” (SLM), laser metal deposition (LMD), extremely high speed laser deposition welding (EHLA) and / or arc welding with wire feed.

11. Measuring roller according to one of claims 1 to 10, characterized in that the at least one carrier body (10) in the at least one recess (8) rests against the walls (20) in the circumferential direction (U).

12. Measuring roller according to one of claims 1 to 11, characterized in that the measuring roller (2) comprises at least one frictional connection element (22), in particular a plate and / or a wedge, wherein the at least one frictional connection element (22) connects the at least one carrier body (10) to the measuring roller body (4) in a frictional connection, in particular in the circumferential direction (U).

13. Measuring roller according to one of claims 1 to 12, characterized in that the at least one carrier body (10) is arranged parallel or tilted to the axis of rotation (R).

14. Measuring roller according to one of claims 1 to 13, characterized in that the carrier body (10) comprises at least two measuring areas (12), wherein the at least two measuring areas (12) are separated by the at least one material weakening (16) so that the at least two measuring ranges (12) carry out two independent and local measurements.

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