Air bearing type plate shape detection roller structure

Abstract

The utility model discloses an air bearing type plate shape detection roller structure, and belongs to the technical field of thin plate strip quality detection equipment. The two ends of a mandrel of the mandrel structure unit are connected to the supporting frame unit, and a roller ring of the roller ring structure unit is arranged on the mandrel in a sleeving mode. According to the utility model, an air bearing type flexible structure is adopted, so that scratches caused by friction between the soft-state thin strip plate and the roll collar are greatly reduced, and the detection and manufacturing quality of the soft-state thin strip plate is improved; the device is simple in design structure, fast to install, firm, durable, sensitive in signal feedback and convenient to maintain and overhaul, the optimal weight distribution is realized, the gravity center is lowered, and the detection stability is improved; the air bearing type strip shape detection roller adopts the air pressure sensor to feed back the spatial variation of pure gas, can quickly feed back the surface quality of a thin strip by utilizing the flowing sensitivity characteristic of the gas, and effectively improves the quick and automatic intervention capability on the surface quality of a thin strip plate.

Description

Technical Field

[0001] The utility model relates to the technical field of sensor detection, in particular to an air bearing type plate shape detection roller structure. Background Art

[0002] Currently, some domestic manufacturers use imported precision nonferrous metal thin strip rolling mills for rolling precision thin strips of nonferrous metals, such as aluminum and copper. In their automatic flatness detection control systems, online flatness detection is a key technology for nonferrous metal precision thin strip rolling. However, the flatness detection software and hardware are mostly imported, and all of them use air-bearing flatness detection roller structures. To replace imported products, the development of an air-bearing flatness detection roller structure is particularly important. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide an air bearing type flatness detection roller structure to achieve online flatness detection during the rolling production process of non-ferrous metal precision thin strips.

[0004] To achieve the above-mentioned purpose, the two ends of the core shaft of the core shaft structure unit of the air bearing type plate shape detection roller structure of the present invention are connected to the support frame unit, and the roller ring of the roller ring structure unit is sleeved on the core shaft.

[0005] Furthermore, the roller ring structural unit includes a roller ring, a sealing ring, a copper ring nest at the end of the roller ring and a radial copper ring nest in the inner cavity of the roller ring; the copper ring nest at the end of the roller ring is connected to one end of the roller ring, the radial copper ring nest in the inner cavity of the roller ring is embedded in the inner circular surface of the roller ring and the copper ring nest at the end of the roller ring, and the sealing rings at both ends of the roller ring pass through the radial copper ring nest in the inner cavity of the roller ring and are sealed at both ends of the roller ring.

[0006] Furthermore, the support frame unit includes a support seat, a support, a thin plate and strip protection plate, and a bracket. The support is fixed to the support seat by screws, the bracket is fixed to the inner side of the support seat on both sides thereof, and the thin plate and strip protection plate is fixed to the upper surface of the upper bracket by screws.

[0007] Furthermore, the core shaft structure unit includes an end sealing plate, an end sealing ring, a core shaft, a high-pressure air nozzle, an air pressure sensor and a nut; the end sealing plates are installed at both ends of the core shaft inner cavity, the end sealing ring is installed between the outer circle of the end sealing plate and the inner circle of the core shaft, the high-pressure air nozzle and the air pressure sensor are fixed in the radially corresponding holes of the core shaft through their own threads, and after the roller ring structure unit is installed axially along the core shaft, the nuts on both sides of the core shaft are tightened to axially fix the roller ring structure unit.

[0008] Furthermore, the air pressure sensor is arranged between the high-pressure air nozzles on both sides thereof, and each group of air nozzle sensor combination units includes an air pressure sensor and the high-pressure air nozzles on both sides thereof. There are multiple groups of air nozzle sensor combination units, and the multiple groups of air nozzle sensor combination units are evenly distributed along the axial direction of the core shaft.

[0009] Furthermore, each group of air nozzle sensor combination units is sheathed with a roller ring.

[0010] Furthermore, the centers of the end sealing plates at both ends of the core shaft inner cavity are respectively provided with end sealing plate inner hole 1 and end sealing plate inner hole 2. After the air pipe and sensor line are passed through the end sealing plate inner hole 1 and the end sealing plate inner hole 2 respectively, sealant is injected to seal them.

[0011] The utility model discloses an air-bearing plate shape detection roller structure. Its plate shape detection principle is to use the pressure change generated by the volume shape of high-pressure air to sense the appearance quality of the plate strip. When the plate shape detection roller is under load, the thin plate strip presses down the roller ring, causing the shape of the high-pressure air ring to change. The air pressure difference generated by the shape change of the high-pressure air ring is fed back to the air pressure sensor. The air pressure sensor transmits the air pressure change signal to the background processor, which can indirectly reflect the appearance quality of the thin plate strip in the form of a waveform. When the appearance of the thin plate strip is straight, the signal fed back by the air pressure sensor is stable and consistent; if the surface of the thin plate strip is uneven, the signal fed back by the air pressure sensor will be different, and the surface quality of the thin plate strip can be judged accordingly.

[0012] Compared with the existing technology, the utility model adopts an air bearing flexible structure, which greatly reduces the scratches caused by the friction between the soft thin plate and strip and the roller ring, and improves the detection and manufacturing quality of the soft thin plate and strip; the equipment design structure is simple, quick to install, firm and durable, signal feedback is sensitive, maintenance and repair are convenient, and the best weight distribution is achieved, the center of gravity is lowered, and the detection stability is improved; the air bearing plate shape detection roller adopts an air pressure sensor to feedback the spatial variation of pure gas, and utilizes the flow sensitivity characteristics of the gas to quickly feedback the surface quality of the thin plate and strip, effectively improving the ability to quickly and automatically intervene in the surface quality of the thin plate and strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein:

[0014] Figure 1 It is a structural diagram of the present utility model.

[0015] Figure 2 for Figure 1 Schematic diagram of the roller ring structure.

[0016] Figure 3 for Figure 1 Schematic diagram of the supporting frame structure.

[0017] Figure 4 for Figure 1 Schematic diagram of the structure of the core shaft structure.

[0018] Figure 5 It is a radial partial cross-sectional view of the present invention in a no-load state.

[0019] Figure 6 It is a radial partial cross-sectional view of the present invention under load.

[0020] In the figure: 1. Roller ring structural unit; 11. Roller ring; 12. Sealing ring; 13. Copper ring nested at the end of the roller ring; 14. Copper ring nested radially in the inner cavity of the roller ring; 2. Support frame unit; 21. Support seat; 22. Support seat; 23. Thin plate and strip protection plate; 24. Bracket; 3. Mandrel structural unit; 31. End sealing plate; 32. End sealing ring; 33. Mandrel; 34. High-pressure air nozzle; 35. Air pressure sensor; 36. Nut; 306. Inner hole one of the end sealing plate; 307. Inner hole two of the end sealing plate; 5. Thin plate and strip; 6. High-pressure air belt ring. DETAILED DESCRIPTION

[0021] In order to make the invention purpose, technical solution and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not intended to limit the scope of protection of the utility model.

[0022] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 As shown, both ends of the core shaft 33 of the core shaft structure unit 3 of the air bearing type plate shape detection roller structure of the present invention are connected to the support frame unit 2 , and the roller ring 11 of the roller ring structure unit 1 is sleeved on the core shaft 33 .

[0023] Preferably, the roller ring structural unit 1 mainly includes a roller ring 11, a sealing ring 12, a copper ring nesting 13 at the roller ring end, and a radial copper ring nesting 14 in the roller ring inner cavity. The copper ring nesting 13 at the roller ring end is connected to one end of the roller ring 11, and the radial copper ring nesting 14 in the roller ring inner cavity is embedded in the inner circumference of the roller ring 11 and the copper ring nesting 13 at the roller ring end. The sealing rings 12 at both ends of the roller ring 11 pass through the radial copper ring nesting 14 in the roller ring inner cavity and are sealed at both ends of the roller ring 11. The roller ring structure unit 1 is designed to improve the stable and safe operation of the equipment; when all the roller ring end copper ring nestings 13 and the roller ring inner cavity radial copper ring nestings 14 on the core shaft 33 are pressed and fixed, the roller ring end copper ring nestings 13 can play the role of buffering and friction lubrication, and the roller ring end copper ring nestings 13 can reduce the possible relative sliding friction between each roller ring structure unit 1, so as not to affect the surface and inspection quality of the thin plate and strip 5; the roller ring inner cavity radial copper ring nestings 14 can prevent the inner ring of the roller ring 11 from colliding with the outer ring of the core shaft 33 in an accidental situation and causing damage to the roller ring 11 or the core shaft 33, and the roller ring inner cavity radial copper ring nestings 14 can achieve the purpose of protecting the core shaft 33.

[0024] Preferably, the support frame unit 2 is the foundation of the equipment, providing reliable support for the stable operation of the entire equipment. The support frame unit 2 mainly includes a support seat 21, a support 22, a thin plate and strip protection plate 23, a bracket 24, etc. The support 22 is fixed to the support seat 21 by screws, the bracket 24 is fixed to the inner side of the support seat 21 on both sides thereof, and the thin plate and strip protection plate 23 is fixed to the upper surface of the upper bracket 24 by screws. The support seat 21 is the base frame of the entire equipment, bearing the weight of the equipment and ensuring stable operation; the support 22 is used to fix the core shaft 33 to prevent the axial and radial movement of the core shaft 33; the purpose of setting the thin plate and strip protection plate 23 is that when the plate roller is repaired or replaced, the thin plate and strip protection plate 23 can be used to support components such as the core shaft structure unit 3 and the roller ring structure unit 1 to prevent the components from being suspended in the air.

[0025] Preferably, the core shaft structure unit 3 is the core part of the entire equipment and is the key to detecting the thin plate strip 5. The core shaft structure unit 3 mainly includes an end sealing plate 31, an end sealing ring 32, a core shaft 33, a high-pressure gas nozzle 34, an air pressure sensor 35 and a nut 36. The end sealing plates 31 are installed at both ends of the inner cavity of the core shaft 33, and the end sealing ring 32 is installed between the outer circle of the end sealing plate 31 and the inner circle of the core shaft 33; the high-pressure gas nozzle 34 and the air pressure sensor 35 are fixed in the radially corresponding holes of the core shaft 33 through their own threads, and the air pressure sensor 35 is arranged between the high-pressure gas nozzles 34 on both sides thereof, and each group of gas nozzle sensor combination units includes an air pressure sensor 35 and high-pressure gas nozzles 34 on both sides thereof, and the gas nozzle sensor combination units are multiple groups, and the multiple groups of gas nozzle sensor combination units are evenly distributed along the axial direction of the core shaft 33. Each group of air nozzle sensor combination units is sheathed with a roller ring 11 of the roller ring structure unit 1; the centers of the end sealing plates 31 at both ends of the inner cavity of the core shaft 33 are respectively provided with an end sealing plate inner hole 1 306 and an end sealing plate inner hole 2 307, and the end sealing plate inner hole 1 306 and the end sealing plate inner hole 2 307 are respectively passed through the air pipe and the sensor line, and then filled with sealant for sealing to ensure that the core shaft 33 becomes a sealed cavity; after the roller ring structure unit 1 is axially installed along the core shaft 33, the nuts 36 on both sides of the core shaft 33 are tightened to axially fix the roller ring structure unit 1.

[0026] The utility model is an air bearing type strip shape detection roller structure. Its strip shape detection principle is to use the pressure change caused by the volume shape of high-pressure air to sense the appearance quality of the strip. Specifically: when in the no-load state, the high-pressure air ring 6 formed by the high-pressure air is as follows: Figure 5 As shown, when the plate shape detection roller is in a stationary state, due to its own weight, there is a deviation a between the center of the high-pressure air belt ring 6 and the center of the core shaft 33. If the plate shape detection roller is in a rotating state, the deviation a can be ignored. When the plate shape detection roller is in a rotating state, the deviation a can be ignored. Figure 6 Under the load condition shown, the thin strip 5 presses down on the roller ring 11, causing the high-pressure air ring 6 to change shape. The resulting pressure differential is fed back to the pressure sensor 35, which transmits the pressure change signal to the backend processor. This signal, in the form of a waveform, indirectly reflects the appearance quality of the thin strip 5. When the thin strip 5 is smooth, the signal fed back by the pressure sensor 35 is stable and consistent. If the surface of the thin strip 5 is uneven, the signal fed back by the pressure sensor 35 will be different, which can be used to determine the surface quality of the thin strip 5.

[0027] The structural design of the air-bearing flatness detection roller in this utility model primarily involves determining the width and number of segments of the roller ring 11, calculating and selecting the orifice size of the high-pressure air nozzle 34, selecting the air pressure sensor 35, and verifying the deflection of the core shaft 33. The number and width of the roller ring 11 are determined based on the actual strip width and detection accuracy. Experimental verification has shown that once the width of the roller ring 11 is determined, the greater the number of segments, the higher the detection accuracy. Generally, an odd number of segments is selected for the roller ring 11.

[0028] The deviation between the center axis of the roller ring 11 and the core shaft 33 due to its own weight is called eccentricity. The eccentricity is generally set at 0.5. Firstly, the roller ring 11, like a radial bearing, operates linearly within the eccentricity, which facilitates calibration of the test roller under no-load conditions. Secondly, it provides a buffer time for the roller ring 11 in the event of an overload or failure, preventing damage to the test roller caused by friction between the radial copper ring nest 14 embedded in the inner ring of the roller ring 11 and the core shaft 33. Once the width of each section of the roller ring 11 is determined, the maximum radial pressure F acting on the roller ring 11 can be calculated based on the material of the thin strip 5 using the formula: F = 2σHLsinΩ, where σ refers to the tensile stress of the thin strip 5; Ω refers to twice the wrap angle of the thin strip 5 around the plate-shaped roller; H refers to the thickness of the thin strip 5; and L refers to the width of the roller ring 11. Based on the curves corresponding to different loads and flows, the inner diameter d1 of the roller ring 11 can be determined by the width L of the roller ring 11 and the maximum radial pressure F. The outer diameter d2 of the roller ring 11 is confirmed using ANSYS simulation software, based on the principle of minimizing the deadweight of the roller ring 11 while ensuring the bearing capacity of the roller ring 11. The radial copper ring nest 14 embedded in the inner surface of the roller ring 11 is a high-strength copper sleeve structure. The purpose is to prevent friction between the rotating roller ring 11 and the fixed core shaft 33 in the event of an overload, which could lead to damage to the roller ring 11, the core shaft 33, or both. The copper ring nest 13 embedded in the end of each roller ring 11 is a high-strength copper ring structure to reduce the mutual friction between the roller rings 11. The key point in the design of the mandrel 33 lies in determining its length, inner diameter, and outer diameter: the length of the mandrel 33 depends on the detection width of the thin plate strip 5, and the outer diameter of the mandrel D = d1-2h, where h refers to the thickness of the high-pressure air belt ring 6; after the outer diameter of the mandrel 33 is determined, the mandrel stiffness is simulated using ANSYS simulation software to meet the requirements, and the inner diameter of the mandrel 33 is as large as possible to facilitate the insertion of the air pipe and the air pressure sensor wire. After the overall dimensions of the roller ring 11 and the mandrel 33 are determined, in order to ensure that the deflection of the detection roller meets the detection accuracy requirements, the detection roller composed of the mandrel 33 and the roller ring 11 needs to be calibrated for deflection. The formula for the maximum deflection f of the plate roller is:

[0029] f=5qw 4 / 384EI

[0030] Where q refers to the uniformly distributed load acting on the plate roller, w refers to the total length of the core shaft 33, E refers to the elastic modulus of the core shaft 33 material, and I refers to the moment of inertia of the core shaft 33. When the deflection is less than the detection accuracy, it proves that the overall design of the roller ring 11 and the core shaft 33 is reasonable. Otherwise, it is necessary to modify the structural dimensions of the roller ring 11 and the core shaft 33, and re-check the deflection until the design requirements are met. The size and throttling form of the throttle hole of the high-pressure gas nozzle 34 not only affect the gas consumption of the plate roller, but also determine the working stiffness of the detection roller. Therefore, only by reasonably matching the throttle hole flow resistance and the air film gap flow resistance can the detection roller have a certain stiffness. Therefore, the design of the throttle hole is the key to the design of the plate detection roller. In actual operation, the air supply pressure p is known, and the throttle hole diameter d can be calculated by the following formula: Win = 3.14dhCp, where Win refers to the gas flow rate in the input core shaft 33, h refers to the thickness of the high-pressure air ring 6, C refers to the flow coefficient, which can be obtained by looking up the table, and p refers to the air supply pressure.

[0031] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. An air bearing type flatness detection roller structure, characterized in that: The core shaft (33) of the core shaft structure unit (3) has two ends connected to the support frame unit (2), and the roller ring (11) of the roller ring structure unit (1) is sleeved on the core shaft (33); The roller ring structural unit (1) comprises a roller ring (11), a sealing ring (12), a roller ring end copper ring nest (13), and a roller ring inner cavity radial copper ring nest (14); the roller ring end copper ring nest (13) is connected to one end of the roller ring (11), the roller ring inner cavity radial copper ring nest (14) is embedded in the inner circumferential surface of the roller ring (11) and the roller ring end copper ring nest (13), and the sealing rings (12) at both ends of the roller ring (11) pass through the roller ring inner cavity radial copper ring nest (14) and are sealed at both ends of the roller ring (11).

2. The air bearing type flatness detection roller structure according to claim 1, characterized in that: The support frame unit (2) comprises a support base (21), a support base (22), a thin plate strip material protection plate (23), and a bracket (24). The support base (22) is fixed to the support base (21) by screws, the bracket (24) is fixed to the inner side of the support base (21) on both sides thereof, and the thin plate strip material protection plate (23) is fixed to the upper surface of the upper bracket (24) by screws.

3. The air bearing type flatness detection roller structure according to claim 1, wherein: The core shaft structure unit (3) comprises an end sealing plate (31), an end sealing ring (32), a core shaft (33), a high-pressure gas nozzle (34), an air pressure sensor (35) and a nut (36); the end sealing plate (31) is installed at both ends of the inner cavity of the core shaft (33), the end sealing ring (32) is installed between the outer circle of the end sealing plate (31) and the inner circle of the core shaft (33), the high-pressure gas nozzle (34) and the air pressure sensor (35) are fixed in the radially corresponding holes of the core shaft (33) through their own threads, and after the roller ring structure unit (1) is installed along the axial direction of the core shaft (33), the nuts (36) on both sides of the core shaft (33) are tightened to axially fix the roller ring structure unit (1).

4. The air bearing type flatness detection roller structure according to claim 3, characterized in that: The air pressure sensor (35) is arranged between the high-pressure air nozzles (34) on both sides thereof. Each group of air nozzle sensor combination units includes the air pressure sensor (35) and the high-pressure air nozzles (34) on both sides thereof. There are multiple groups of air nozzle sensor combination units, and the multiple groups of air nozzle sensor combination units are evenly distributed along the axial direction of the core shaft (33).

5. The air bearing type flatness detection roller structure according to claim 4, characterized in that: Each group of air nozzle sensor combination units is sheathed with a roller ring (11).

6. The air bearing type flatness detection roller structure according to claim 3, characterized in that: The centers of the end sealing plates (31) at both ends of the inner cavity of the core shaft (33) are respectively provided with an end sealing plate inner hole 1 (306) and an end sealing plate inner hole 2 (307). The end sealing plate inner hole 1 (306) and the end sealing plate inner hole 2 (307) are respectively passed through the air pipe and the sensor line, and then sealed with sealant.

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