Roll bending and roll shifting integrated cooperative control device for hot continuous rolling finishing mill group

Abstract

The invention discloses a roll bending and roll shifting integrated cooperative control device for a hot continuous rolling finishing mill group. The problems that an existing roll bending and shifting control device of a rolling mill is complex in structure and short in service life are solved. The device comprises two blocks installed on a rack, a roll bending hydraulic cylinder is arranged in each block, four roll shifting hydraulic cylinders are arranged on the outer sides of the two blocks, and locking hydraulic cylinders are correspondingly arranged on the exteriors of the four roll shifting hydraulic cylinders correspondingly; buffer sleeves are arranged between the block body and the bending roller cylinder body and between the block body and the lower guide sleeve; the device is simple and compact in overall structure, high in integration level, convenient to disassemble and assemble and low in cost, the plate shape regulation and control capacity of the rolling mill is optimized, and the strip steel quality and production efficiency are improved; the roller bending hydraulic cylinder is of an independent floating type structure, the roller bending hydraulic cylinder is designed to be an independent unit and installed in the buffer sleeve embedded in the block body in a floating mode, the radial force borne between the piston rod and the cylinder body is avoided, the mechanical stress of a hydraulic cylinder body is reduced, and the service life of a core component is prolonged.

Description

Technical Field

[0001] This application relates to the field of metallurgical rolling equipment technology, specifically to an integrated collaborative control device for bending rolls and shifting rolls in a hot continuous rolling mill finishing unit. Background Technology

[0002] The rolling profile is a crucial step in the production of steel plates and strips, directly impacting overall quality and application performance. A high-quality profile ensures the flatness, dimensional accuracy, and surface finish of the steel, meeting the demands of various high-end applications. During rolling, the quality of the profile not only affects the appearance of the steel but also directly influences its mechanical properties, service life, and subsequent processing capabilities. The CVC (Continuous Variable Crown) bending and shifting roll system in hot strip finishing mills effectively adjusts and controls the roll gap shape during the rolling process by controlling the bending and shifting of the rolls.

[0003] The existing bending roller system has the following problems in use:

[0004] 1. Existing hydraulic cylinders for bending and swaying rollers suffer from problems such as high working pressure, high-frequency operation, and large radial impact, which significantly reduces the service life of the hydraulic cylinders for bending and swaying rollers.

[0005] 2. In existing movable bending and shifting mechanisms, although the shifting roller cylinder is integrated onto the bending roller block and moves with it, its front end is connected to the archway via a fixed seat. Theoretically, the bending and shifting block is pressed tightly against the fixed seat, and the shifting roller cylinder is only responsible for driving the bending and shifting block to move horizontally, without bearing radial force. However, in actual operation, due to the gap between the bending roller blocks on both sides and the work roll bearing housing, the impact and vibration of the rolls may cause the shifting roller cylinder to be subjected to radial force due to factors such as lubricating oil adhesion on the contact surface, vacuum adsorption, and locking. These problems may lead to a series of failures such as cylinder head seal damage, cylinder head fixing screw failure, piston rod breakage, and bolt rod fixing bolt loosening and breakage.

[0006] 3. The existing integrated bending roll block of the rolling mill is mainly connected to the rolling mill stand by screws and keys to ensure fastening and positioning. Multiple keyways are usually made on the bending roll block and the original rolling mill stand. However, because the keyways need to be machined on-site, this significantly increases the difficulty of the modification project and prolongs the modification time. At the same time, the keyways also occupy the block space of the bending roll device cylinder, limiting the cylinder diameter of the bending roll cylinder.

[0007] 4. The existing anti-rotation guide structure of the lateral displacement device is fixed on the operating side frame, including upper and lower guide plates and a lower support plate welded to the moving sleeve. The overall structure is complex, requires a large amount of processing, and has high cost.

[0008] 5. Existing shaft clamping devices are typically fixed to the transmission side frame, leading to numerous problems during use, such as: 1) Insufficient clamping force, causing shaft slippage due to wedge wear and friction plate aging; 2) Poor alignment, resulting in abnormal wear and vibration of the cross-shaped clamps due to installation errors or roll misalignment; 3) Heat deformation jamming, as the high temperature of the rolls is conducted to the clamping mechanism, affecting its operational flexibility; 4) Frequent maintenance, as mechanical parts (such as the flat end and sleeve) wear rapidly due to fretting friction and poor lubrication, requiring periodic replacement. These problems directly affect rolling accuracy and equipment operating rate. Summary of the Invention

[0009] Therefore, this application provides an integrated collaborative control device for bending and shifting rolls in a hot continuous rolling mill, in order to solve the problems of complex structure and short service life of existing bending and shifting roll control devices in rolling mills.

[0010] An integrated control device for bending rolls and shifting rolls in a hot continuous rolling mill is installed at one end of the working roll operating side, and the other end of the working roll is the transmission side. The working roll includes an upper working roll and a lower working roll arranged sequentially, and the upper working roll and the lower working roll are both provided with bearing seats on their exteriors.

[0011] The integrated control device for bending and shifting rollers includes two blocks mounted on the frame and located at the inlet and outlet of the working rollers, respectively denoted as the inlet first block and the outlet first block. A bending roller hydraulic cylinder is correspondingly installed inside each of the inlet first block and the outlet first block. Shifting roller hydraulic cylinders are correspondingly installed on the upper and lower parts of the outer side of the inlet first block, the upper part of the outer side of the outlet first block, and the lower part of the outer side of the outlet first block. The two shifting roller hydraulic cylinders on the upper part of the inlet and outlet first blocks are connected via an upper bearing seat outside the upper working roller, and the two shifting roller hydraulic cylinders on the lower part of the inlet and outlet first blocks are connected via a lower bearing seat outside the lower working roller. Locking hydraulic cylinders are correspondingly installed on the exterior of each of the four shifting roller hydraulic cylinders.

[0012] The block is provided with mounting holes for installing the bending roller hydraulic cylinder in the vertical direction. The bending roller hydraulic cylinder includes a bending roller cylinder body and a bending roller piston rod disposed inside the bending roller cylinder body. An upper guide sleeve and a lower guide sleeve are respectively provided on the upper and lower parts of the bending roller cylinder body. The bottom of the bending roller piston rod is connected to a connecting rod, and the bottom of the connecting rod is connected to the lower guide sleeve. A buffer sleeve is provided between the block and the bending roller cylinder body and the lower guide sleeve respectively.

[0013] Compared with the prior art, this application has at least the following beneficial effects:

[0014] 1. Based on further analysis and research of existing technical problems, this application provides an integrated collaborative control device for bending rolls and shifting rolls in a hot continuous rolling mill. This integrated collaborative control device is installed on the block of the mill stand. The overall structure is simple and compact, with high integration, convenient disassembly and assembly, and low cost. It optimizes the mill's strip shape control capability and improves strip quality and production efficiency. The bending roll hydraulic cylinder adopts an independent floating structure and a buffer sleeve is set inside the block. By designing the bending roll hydraulic cylinder as an independent unit and floating it in the buffer sleeve embedded in the block, it has the following advantages: the horizontal impact of rolling is absorbed by the buffer sleeve, avoiding the radial force between the piston rod and the cylinder body, and reducing the mechanical stress of the hydraulic cylinder body, thus extending the service life of the core components.

[0015] 2. A sealing ring is provided between the bending roll cylinder body and the bending roll piston rod in this application. The sealing ring is a variable cross-section anti-extrusion sealing ring, with an arc-shaped first protrusion and a second protrusion on its outer and inner surfaces, respectively. The double arc structure effectively prevents extrusion under low load and long stroke conditions, which not only ensures the sealing effect, but also allows for a larger gap between metal moving parts, thereby effectively overcoming the influence of bore diameter and shaft diameter deviation, and significantly improving the performance and service life of the sealing ring. Furthermore, a dustproof ring is also provided between the bending roll cylinder body and the bending roll piston rod. The dustproof ring has a serrated structure, which scrapes and blocks external contaminants with the serrated edge while maintaining the seal, improving the cleanliness and sealing life of the entire system. In addition, the sealing ring and the dustproof ring are made of HPU material, which has better wear resistance. The bending roll hydraulic cylinder improves its reliability and service life through the innovative design of independent floating structure + copper sleeve buffer + HPU wear-resistant seal, which is especially suitable for high impact and dusty and wet rolling mill conditions.

[0016] 3. The roller shifting device of this application has a more compact design space, does not occupy the frame space, and all positioning structures are integrated on the block, with high dimensional accuracy and convenient disassembly and maintenance.

[0017] 4. The locking of the work roll in this application adopts a rotary locking method. The rotating sleeve of the shifting roll is sleeved outside the cylinder of the shifting roll, and the rotating sleeve is driven to rotate by the locking hydraulic cylinder, thereby achieving locking. This structure has a larger load-bearing component, and the rotating sleeve bushing of the shifting roll has strong anti-contamination ability and lower precision requirements. In addition, the locking hydraulic cylinder does not directly bear the locking force and impact force, thereby improving the stability and durability of the overall structure.

[0018] 5. This application improves the block by lengthening it axially and adding stops at both ends to form a groove structure. Axial positioning is achieved by directly fitting the stop surfaces on both sides to the outside of the frame, completely eliminating the keyway design of the traditional frame. The lengthened block can accommodate more existing mating holes, reducing the need for new drilling, lowering costs, and improving overall strength. Eliminating the keyway eliminates the risk of hydraulic cylinder oil leakage, and the hollowed-out design avoids the installation area of ​​the bending roller hydraulic cylinder, further reducing the weight of the block and lowering costs.

[0019] 6. The shaft clamping device of this application is integrated on the block on the transmission side. The overall structure is simple, the cost is low, and the operation is convenient. The shaft positioning and clamping device adopts hydraulic drive technology. The clamping body (clamping claw) is pushed by the hydraulic cylinder to realize the rapid locking and releasing of the roll shaft. Its core working principle is to use the high pressure oil of the hydraulic system to drive the clamping mechanism with the hydraulic cylinder as the main body, so that the clamping body and the flat head of the shaft at the end of the work roll form a stable engagement, ensuring the efficient transmission of torque.

[0020] 1) The modular design of the four clamping bodies (four clamping claws) is arranged vertically to enhance the overall rigidity and stability; 2) The precision axial positioning system prevents the rotation of the working roll shaft through the working roll cylinder sleeve and keyway structure, ensuring the stability and safety of the rolling process; 3) The optimized spatial layout design perfectly adapts to the needs of the rolling mill's roll shifting mechanism, avoiding roll changing interference. Its outstanding advantages are: (1) Driven by a servo hydraulic cylinder, its clamping / releasing action is fast (response time < 1 second), greatly improving the roll changing efficiency; (2) Driven by a servo hydraulic cylinder, its clamping force is as high as 500kN or more, ensuring the reliability of high torque rolling; (3) Wear-resistant alloy liners (pallet pads) are used, and the service life can be up to 3 times that of traditional devices; the clamping pallet inlet side and outlet side can be interchanged. Attached Figure Description

[0021] To more intuitively illustrate the prior art and this application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be considered as limiting conditions for implementing this application.

[0022] Figure 1 A schematic diagram of the integrated coordinated control device for bending rolls and shifting rolls provided in one embodiment of this application. Figure 1 ;

[0023] Figure 2 A schematic diagram of the integrated coordinated control device for bending rolls and shifting rolls provided in one embodiment of this application. Figure 2 ;

[0024] Figure 3 for Figure 1 The vertical sectional view of the hydraulic cylinder of the bending roller shown;

[0025] Figure 4 for Figure 1 The horizontal cross-sectional view of the hydraulic cylinder of the roller shown;

[0026] Figure 5 for Figure 1 A partial schematic diagram of one end of the working roll on the operating side;

[0027] Figure 6 for Figure 5 Schematic diagram of the locking hydraulic cylinder and the roller hydraulic cylinder;

[0028] Figure 7 for Figure 5 Cross-sectional view of the hydraulic cylinders for the bending roller and the lateral roller at the first block of the inlet;

[0029] Figure 8 for Figure 5 Cross-sectional view of the hydraulic cylinders for the bending roller and the lateral roller at the first block of the outlet;

[0030] Figure 9 for Figure 5 Schematic diagram of the internal structure of the hydraulic cylinder of the bending roller;

[0031] Figure 10 for Figure 5 A schematic diagram of the hydraulic cylinder of the bending roller with a buffer sleeve;

[0032] Figure 11 for Figure 5 Schematic diagram of the sealing ring and dustproof ring;

[0033] Figure 12 for Figure 11 Schematic diagram of the middle sealing ring;

[0034] Figure 13 for Figure 11 Schematic diagram of the dustproof ring;

[0035] Figure 14 for Figure 5 Front sectional view of the hydraulic cylinder of the intermediate roller;

[0036] Figure 15 for Figure 5 Top view of the first block at the inlet, the hydraulic cylinder for the traversing roller, and the hydraulic cylinder for locking;

[0037] Figure 16 for Figure 15 A partial schematic diagram of the first block of the central entrance;

[0038] Figure 17 for Figure 5 Schematic diagram of the upper and lower bearing housings Figure 1 ;

[0039] Figure 18 for Figure 5 Schematic diagram of the upper and lower bearing housings Figure 2 ;

[0040] Figure 19 for Figure 5 Schematic diagram of the guide post;

[0041] Figure 20 for Figure 19 A cross-sectional view at the two guide pillars;

[0042] Figure 21 for Figure 1 A partial schematic diagram of one end of the drive side of the intermediate working roll;

[0043] Figure 22 for Figure 21 Longitudinal sectional view of the central shaft clamping device;

[0044] Figure 23 for Figure 21 A schematic diagram of the keyway and tray positioning block;

[0045] Figure 24 for Figure 21 A partial view of the connection between the clamping tray and the clamping piston rod;

[0046] Figure 25 for Figure 21 A schematic diagram of the second block at the central inlet and the clamping structure.

[0047] Explanation of reference numerals in the attached figures:

[0048] 1. Frame; 2. Work roll; 21. Upper work roll; 22. Lower work roll; 23. Work roll cylinder sleeve; 231. Keyway; 3. Block; 31. First inlet block; 32. First outlet block; 33. Second inlet block; 34. Second outlet block; 35. First stop; 36. Second stop; 37. Hollowed-out section; 38. Mounting block; 4. Upper bearing housing; 41. Upper seat body; 42. Upper lifting block; 43. Slide groove; 44. Wear-resistant part; 5. Lower bearing housing; 51. Lower seat body; 52. Lower lifting block; 53. Slide column; 6. Bending roll hydraulic cylinder; 61. Bending roll cylinder body; 62. Bending roll piston rod; 63. Upper guide sleeve; 64. Lower guide sleeve; 65. Connecting rod; 66. Buffer sleeve; 67. Sealing ring; 671. First protrusion; 672. Second protrusion; 68. Dustproof ring; 7. Roller shifting hydraulic cylinder 71. Roller cylinder; 72. Roller piston rod; 73. Roller support sleeve; 74. First limiting block; 75. Roller guide sleeve; 76. Roller rotating sleeve; 761. First plane; 762. Second plane; 77. Roller cylinder cover; 78. Roller sleeve; 79. Roller cylinder rear cover; 710. Roller piston rod sleeve; 711. Roller cylinder locking sleeve; 712. Roller piston buffer sleeve; 713. Second rear cover; 714. Displacement sensor; 8. Locking fluid 81. Cylinder; 82. Locking cylinder body; 83. Locking piston rod; 9. Rotating block; 9. Shaft clamping device; 91. Clamping structure; 911. Clamping plate; 912. Upper through-hole; 913. Lower through-hole; 914. Clamping body; 915. Upper connecting body; 916. Lower connecting body; 92. Clamping cylinder; 921. Clamping cylinder body; 922. Clamping piston rod; 923. Clamping piston; 924. Sliding sleeve; 925. First guide sleeve; 926. Second... Limit block; 927, outer sleeve; 928, first rear cover; 929, clamping cylinder head; 930, screw; 93, clamping pallet; 931, fork head; 94, clamping claw; 95, pallet pad; 96, pallet positioning block; 10, anti-rotation device; 101, guide post; 102, double-ended stud; 103, sliding bearing; 104, pressure cap; 105, dustproof sealing ring; 106, connecting block; 107, nut; 108, protective cover; 11, oil inlet block;

[0049] A. Operating side; B. Transmission side. Detailed Implementation

[0050] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] In the description of this application: unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," etc., used in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (e.g., they should not be construed as an emphasis on importance or order). Expressions such as "including," "comprising," and "having" also mean "not limited to" (certain units, components, materials, steps, etc.). Terms such as "upper," "lower," "left," "right," and "middle" used in this application are generally indications of general relative positional relationships for ease of visual understanding with reference to the accompanying drawings, and are not absolute limitations on positional relationships in the actual product.

[0052] One embodiment of this application, such as Figures 1-25 As shown, an integrated control device for bending rolls and shifting rolls in a hot continuous rolling mill is installed at one end of the working roll 2 on the operating side A of the mill, and the other end of the working roll 2 is the transmission side B. The working roll 2 includes an upper working roll 21 and a lower working roll 22 arranged sequentially, and bearing seats are provided on the outside of both the upper working roll 21 and the lower working roll 22.

[0053] The integrated control device for bending and shifting rollers includes two blocks 3 mounted on the frame 1. The two blocks 3 are symmetrically arranged at the inlet and outlet of the work roll 2, and are respectively designated as the inlet first block 31 and the outlet first block 32. Bending roller hydraulic cylinders 6 are respectively arranged vertically inside the inlet first block 31 and the outlet first block 32. Shifting rollers are respectively arranged on the upper part of the outer side of the inlet first block 31, the lower part of the outer side of the inlet first block 31, the upper part of the outer side of the outlet first block 32, and the lower part of the outer side of the outlet first block 32. Hydraulic cylinders 7 are provided, and the two roller hydraulic cylinders 7 on the upper part of the first inlet block 31 and the first outlet block 32 are connected by an upper bearing seat 4, and the two roller hydraulic cylinders 7 on the lower part of the first inlet block 31 and the first outlet block 32 are connected by a lower bearing seat 5. The upper bearing seat 4 and the lower bearing seat 5 are respectively sleeved on the outside of the upper working roller 21 and the lower working roller 22. The two ends of the lower bearing seat 5 are set on the track at the bottom of the frame 1, and can move axially along the track. Locking hydraulic cylinders 8 are respectively provided on the outside of the four roller hydraulic cylinders 7.

[0054] Block 3 has mounting holes along the vertical direction for installing the bending roller hydraulic cylinder 6, such as... Figures 7-9As shown, the bending roller hydraulic cylinder 6 includes a bending roller cylinder body 61 and a bending roller piston rod 62 disposed inside the bending roller cylinder body 61. An upper guide sleeve 63 and a lower guide sleeve 64 are respectively disposed on the upper and lower parts of the bending roller cylinder body 61. The top of the bending roller piston rod 62 is connected to the upper guide sleeve 63, the bottom of the bending roller piston rod 62 is connected to the connecting rod 65, and the bottom of the connecting rod 65 is connected to the lower guide sleeve 64. Buffer sleeves 66 are disposed between the inner wall of the block 3 and the outer wall of the bending roller cylinder body 61, and between the inner wall of the block 3 and the outer wall of the lower guide sleeve 64.

[0055] The above-mentioned: Bending roller hydraulic cylinders 6 are vertically installed inside the first inlet block 31 and the first outlet block 32, respectively designated as the first bending roller hydraulic cylinder and the second bending roller hydraulic cylinder; the upper and lower outer parts of the inlet first block 31 are respectively designated as the first upper bending roller hydraulic cylinder and the first lower bending roller hydraulic cylinder; the upper and lower outer parts of the outlet first block 32 are respectively designated as the second upper bending roller hydraulic cylinder and the second lower bending roller hydraulic cylinder. These four bending roller hydraulic cylinders 7 act on the inlet and outlet of the upper working roller 21 and the inlet and outlet of the lower working roller 22, respectively, and are integrated with the corresponding blocks 3. The hydraulic cylinder has a stroke of 310mm and an adjustment range of ±150mm. The first and second upper roller hydraulic cylinders are connected by an upper bearing seat 4, and the first and second lower roller hydraulic cylinders are connected by a lower bearing seat 5. The locking hydraulic cylinders 8 externally mounted on the first, second, and third upper roller hydraulic cylinders are respectively designated as the first upper locking hydraulic cylinder, the first lower locking hydraulic cylinder, the second upper locking hydraulic cylinder, and the second lower locking hydraulic cylinder. The frame 1 is also equipped with an upper support roller located above the upper working roller 21 and a lower support roller located below the lower working roller 22. Taking the first bending roller hydraulic cylinder as an example, the bending roller piston rod 62 drives the bending roller cylinder body 61 and the upper guide sleeve 63 to move upward, thereby causing the upper guide sleeve 63 to lift the upper bearing seat 4, which in turn causes the upper working roller 21 to rise.

[0056] The bending roller hydraulic cylinder 6 adopts an independent floating structure and a buffer sleeve 66 is set inside the block 3. The shell of the buffer sleeve 66 is made of copper. By designing the bending roller hydraulic cylinder 6 as an independent unit and floating it in the buffer sleeve 66 embedded in the block 3, it has the following advantages: the horizontal impact of rolling is absorbed by the copper sleeve, avoiding the radial force between the piston rod and the cylinder body, reducing the mechanical stress of the hydraulic cylinder body, and extending the service life of the core components.

[0057] To address the issue of maintaining a good sealing effect even when the gap in the sealing of the bending roller cylinder changes during operation, a variable cross-section anti-extrusion sealing ring 67 was designed.

[0058] like Figures 9-13As shown, the sealing ring 67 is disposed between the bending roller cylinder 61 and the bending roller piston rod 62. The outer and inner surfaces of the sealing ring 67 are respectively provided with a first protrusion 671 and a second protrusion 672, as shown in the figure. Figure 12 The first protrusion 671 and the second protrusion 672 are arc-shaped. The sealing ring 67 specifically includes a sealing ring body with an annular structure and a top surface and a bottom surface disposed on the sealing ring body and parallel to each other to ensure stable installation. The first protrusion 671 and the second protrusion 672 are respectively disposed on the outer surface and the inner surface of the sealing ring body and are arc-shaped.

[0059] The outer surface of the sealing ring body is provided with an arc-shaped first protrusion 671, which can effectively prevent extrusion under low-load, long-stroke sealing conditions. In addition, the inner surface of the sealing ring body is also designed with an arc-shaped second protrusion 672, which further enhances the anti-extrusion effect. The double arc structure effectively prevents extrusion under low-load, long-stroke conditions, which not only ensures the sealing effect, but also allows for a larger gap between metal moving parts, thereby effectively overcoming the effects of bore diameter and shaft diameter deviations, and significantly improving the performance and service life of the sealing ring 67.

[0060] Furthermore, to improve the wear resistance and dustproof performance of the sealing system, the sealing ring 67 is made of high-wear-resistant HPU material. Even more preferably, such as... Figure 13 As shown, a dustproof ring 68 is also provided between the bending roller cylinder 61 and the bending roller piston rod 62. The dustproof ring 68 is located below the sealing ring 67, and the outer wall of the dustproof ring 68 has a serrated structure and is made of HPU material.

[0061] The dust seal 68 plays a crucial role in preventing external contaminants from entering the sealing system. The dust seal 68 is installed between the cylinder and the piston rod and spaced apart from the sealing ring 67 to form an optimal sealing and dust prevention system. The serrated dust seal 68 is designed to maintain a seal while scraping away and blocking external contaminants with its serrated edges, thereby improving the cleanliness and sealing life of the entire system.

[0062] The bending roll hydraulic cylinder 6 features an innovative design with an independent floating structure, copper sleeve buffer, and HPU wear-resistant seal. This optimizes the radial load-bearing path and significantly suppresses wear on key components. This solution provides a highly reliable and long-life hydraulic actuation solution for fixed bending mechanisms, making it particularly suitable for high-impact, dusty, and wet rolling mill conditions.

[0063] Preferably, such as Figure 7 , Figure 8 , Figure 14As shown, the roller shifting hydraulic cylinder 7 includes a roller shifting cylinder barrel 71, a roller shifting piston rod 72 disposed inside the roller shifting cylinder barrel 71, and a roller shifting cylinder cover 77 disposed at the end of the roller shifting cylinder barrel 71. A roller shifting support sleeve 73 is disposed outside the roller shifting cylinder barrel 71. A roller shifting guide sleeve 75 and a roller shifting rotating sleeve 76 are disposed outside the roller shifting support sleeve 73. A first limiting block 74 is disposed at the end of the roller shifting support sleeve 73, which is used to contact the end face of the bearing seat. A roller shifting sleeve 78 is disposed outside the roller shifting guide sleeve 75. A second rear cover 713 (roller shifting cylinder rear cover) is also disposed at the end of the roller shifting piston rod 72. The rear cover and rear cover 79 of the roller cylinder are provided; a roller piston rod sleeve 710 is provided between the second rear cover 713 and the roller piston rod 72. The roller piston rod sleeve 710 is used for positioning. The roller piston rod sleeve 710 has a threaded structure inside, which is connected to the external thread at the end of the roller piston rod 72 to realize the positioning function. There is a threaded hole on the top of the roller piston rod sleeve 710, which is connected to the second rear cover 713 by screws to realize the fixing and anti-rotation function; a roller cylinder locking sleeve 711 is also provided at the end of the roller piston rod 72, and a roller piston buffer sleeve 712 is provided on the outside of the roller piston rod 72.

[0064] During operation, when the rotating sleeve 76 of the traverse roller locks the bearing seat under the action of the locking hydraulic cylinder 8, the piston rod 72 of the traverse roller drives the traverse roller guide sleeve 75, the rotating sleeve 76 of the traverse roller and the traverse roller support sleeve 73 outside the traverse roller cylinder 71 to move axially as a whole, and drives the bearing seat to move axially, thereby causing the working roller to move axially.

[0065] Preferably, the hydraulic cylinder 7 for the roller shifting also includes a displacement sensor 714 disposed along the axial direction (see...). Figure 14 The displacement sensor 714 is used to detect the displacement of the piston rod 72 of the roller shifting cylinder in real time. In addition, the rear cover 79 of the roller shifting cylinder is made of acrylic material, so the status of the displacement sensor 714 can be seen from the outside, and adjustments can be made in real time.

[0066] In the bending roll system of a hot strip mill finishing mill, the displacement sensor is a key monitoring element to ensure precise axial movement of the rolls. Firstly, it provides closed-loop feedback to the control system by real-time detection of the displacement of the piston rod of the roll-shifting cylinder (accuracy up to ±0.01mm), ensuring that the axial position of the rolls strictly adheres to process requirements (e.g., ±5mm fine-tuning to control strip edge thinning). Secondly, the sensor dynamically captures position fluctuations during rolling with a millisecond-level response speed (≥1kHz sampling frequency), working in conjunction with a servo valve to quickly adjust hydraulic pressure, effectively suppressing vibrations caused by sudden changes in rolling force. Finally, the sensor also has a safety protection function; when roll movement exceeds limits (e.g., mechanical limit failure) or an abnormal signal is detected, an alarm is immediately triggered and the machine is shut down to prevent equipment damage. Modern systems often use high-temperature resistant (150℃) and vibration-resistant (IP67 protection) magnetostrictive or grating sensors, transmitting data via digital signals (e.g., SSI interface). Compared to traditional analog sensors, these sensors offer stronger resistance to electromagnetic interference and superior long-term stability, providing a reliable guarantee for high-precision strip shape control.

[0067] More preferably, such as Figure 6 As shown, the locking hydraulic cylinder 8 is located outside the rotating sleeve 76 of the shifting roller; the locking hydraulic cylinder 8 includes a locking cylinder body 81 and a locking piston rod 82 located inside the locking cylinder body 81. The end of the locking piston rod 82 is provided with a rotating block 83, which is rotatably connected to the rotating sleeve 76 of the shifting roller; the rotating sleeve 76 of the shifting roller is rotatably connected to the cylinder 71 of the shifting roller. When the working roller 2 moves axially into position, the locking hydraulic cylinder 8 drives the rotating sleeve 76 of the shifting roller to rotate, thereby limiting the bearing seat; the locking hydraulic cylinder 8 is also fixed to the rotating sleeve 73 of the shifting roller through a connecting piece.

[0068] like Figure 19 As shown, the outer wall of the rotating sleeve 76 near the work roll 2 has two first planes 761 and second planes 762 at a certain angle. When the locking hydraulic cylinder 8 is in the retracted state, the first plane 761 of the rotating sleeve 76 is vertical and the second plane 762 is inclined, allowing the bearing seat outside the work roll 2 to pass through. When the work roll 2 is installed in place, the locking hydraulic cylinder 8 extends. At this time, the rotating sleeve 76 rotates under the action of the locking hydraulic cylinder 8, the first plane 761 becomes inclined and the second plane 762 becomes vertical, and just locks the bearing seat, thereby achieving the locking of the work roll 2.

[0069] More preferably, such as Figure 19 , Figure 20 As shown, the roller support sleeve 73 is equipped with an anti-rotation device 10 to prevent the roller support sleeve 73 from rotating. The anti-rotation device 10 includes a guide post 101, a double-ended stud 102, a sliding bearing 103, and a pressure cap 104.

[0070] Taking the first inlet block 31 as an example, the guide post 101 penetrates the roller support sleeve 73. A double-ended stud 102 is installed along the length of the guide post 101. One end of the double-ended stud 102 is screwed into the first inlet block 31 to fix and support the entire anti-rotation device. A sliding bearing 103 is installed between the roller support sleeve 73 and the guide post 101. A pressure cap 104 is installed on the roller support sleeve 73, bolted to it. The pressure cap 104 has a dustproof groove, and a dustproof sealing ring 105 is placed in the groove to isolate dust. The guide post 101... A connecting block 106 is provided at the end (the end away from the first block 31 of the inlet). The connecting block 106 fits tightly with the two upper and lower guide posts 101 to fix the relative position of the two guide posts 101 again. The connecting block 106 is provided with an O-ring groove to place an O-ring seal to prevent water from entering the interior. The end of the double-ended stud 102 (the end away from the first block 31 of the inlet) is also provided with a nut 107 and a protective cover 108. The nut 107 is used to press the connecting block 106, and the protective cover 108 is used to protect the nut 107 and the double-ended stud 102 from corrosion.

[0071] Two guide posts 101 are respectively arranged axially on the outer side of the first inlet block 31 and the first outlet block 32, for a total of four guide posts. The four guide posts 101 correspond to the roller support sleeves 73 that pass through the first upper roller hydraulic cylinder, the first lower roller hydraulic cylinder, the second upper roller hydraulic cylinder, and the second lower roller hydraulic cylinder, respectively, and are used to prevent the corresponding roller support sleeves 73 from rotating. Specifically, the guide posts 101 corresponding to the first upper roller hydraulic cylinder and the first lower roller hydraulic cylinder are arranged on the side close to each other, and the ends of the two guide posts 101 are connected by a connecting block 106. The guide posts 101 corresponding to the second upper roller hydraulic cylinder and the second lower roller hydraulic cylinder are arranged on the side close to each other, and the ends of the two guide posts 101 are connected by a connecting block 106.

[0072] During the rotation of the roller rotating sleeve 76 of the aforementioned roller-shifting hydraulic cylinder 7, the roller-shifting support sleeve 73 may be driven to rotate. Therefore, the traditional anti-rotation guide form of the roller-shifting hydraulic cylinder 7 is changed from planar guide to cylindrical surface guide. The new structure eliminates the upper / lower guide plates fixed on the operating side A frame 1 and the lower support plate welded to the moving sleeve, and eliminates the machining of the keyway, engagement threaded hole, and guide plate engagement plane on the outer surface of the operating side A frame 1, reducing the amount of online machining and saving costs. Guided by guide posts 101, using cylindrical surface guide, the upper and lower guide posts 101 are fixed to the operating side A block 3 (fixed block) by bolts. The guide posts 101 and the block 3 adopt an interference fit, and the ends of the upper and lower guide posts 101 are connected by connecting blocks 106 to stabilize the structure of the guide posts 101.

[0073] The sliding bearing adopts imported self-lubricating bearings, which have good sliding effect, strong load-bearing capacity, eliminate the need for dry oil piping, have a simple structure, low maintenance cost, stable and reliable operation, and long service life; the sliding bearing is also equipped with dustproof sealing plugs on both sides, which can effectively protect the sliding surface and the working environment of the bearing, and extend its service life.

[0074] Compared to traditional structures, this structure's roller shifting device has a more compact design space, does not occupy the space of frame 1, and all positioning structures are integrated on the fixed block, resulting in high dimensional accuracy and convenient disassembly and maintenance.

[0075] The locking of the aforementioned work roll 2 employs a rotary locking method. The rotating sleeve 76 is fitted over the outside of the rotating sleeve cylinder 71, and the locking hydraulic cylinder 8 drives the rotating sleeve 76 (locking sleeve) to rotate, thereby achieving locking. This structure features relatively large load-bearing components, and the rotating sleeve 76 bushing has strong anti-contamination capabilities and lower precision requirements. Furthermore, the locking hydraulic cylinder 8 does not directly bear the locking force and impact force, thus improving the overall structural stability and durability. The locking force can be dynamically adjusted according to the rolling force, preventing excessive tightening that could lead to guide rail wear.

[0076] Preferably, such as Figure 15 , Figure 16 As shown, the block 3 has a first stop 35 and a second stop 36 on its two sides respectively. The first stop 35 and the second stop 36 are respectively snapped onto the two sides of the frame 1. The block 3 has a hollow part 37 at the position corresponding to the second stop 36. The upper and lower parts of the block 3 are respectively provided with mounting blocks 38, which are connected to the frame 1 by screws.

[0077] To minimize modifications to the frame 1 and shorten the modification cycle, this application improves the block 3 by axially lengthening it and adding stops at both ends to form a groove structure. Axial positioning is achieved by directly fitting the stop surfaces on both sides to the outside of the frame 1, completely eliminating the keyway design of the traditional frame 1. The lengthened block 3 can accommodate more existing fitting holes, reducing the need for new drilling, lowering costs, and improving the overall strength of the block 3. Eliminating the keyway eliminates the risk of hydraulic cylinder oil leakage, and the design of the hollow part 37 avoids the installation area of ​​the bending roller hydraulic cylinder 6, further reducing the weight of the block 3 and lowering costs.

[0078] Preferably, such as Figure 16 , Figure 17 As shown, the upper bearing seat 4 includes an upper seat body 41 and an upper lifting block 42 disposed on the upper seat body 41, with both ends of the upper lifting block 42 located at the upper part of the two upper guide sleeves 63 respectively; the lower bearing seat 5 includes a lower seat body 51 and a lower lifting block 52 disposed on the lower seat body 51, with both ends of the lower lifting block 52 located at the bottom of the two lower guide sleeves 64 respectively.

[0079] More preferably, wear-resistant parts 44 are provided at both ends of the upper lifting block 42 and the lower lifting block 52; at the same time, the oil supply of the above-mentioned hydraulic cylinders is uniformly completed through the integrated oil inlet block 11.

[0080] In a further preferred embodiment, the bottom of the upper bearing seat 4 is provided with a sliding groove 43, and the upper part of the lower seat 51 is provided with a sliding column 53, which drives the lower bearing seat 5 to move axially along the sliding groove 43.

[0081] In this application, a locking hydraulic cylinder 8 is added to the bearing housing on the operating side A, and the two ends of the bearing housing are extended (i.e., the two ends of the upper lifting block 42 are extended) to form a large-area contact working surface with the guide sleeve, which not only provides a friction surface for the bending roller, but also realizes the locking of the operating side A. The structure integrates positioning and force transmission.

[0082] Preferably, such as Figures 21-25 As shown, the transmission side B is provided with an inlet second block 33, an outlet second block 34, and inlet clamping structures 91 and outlet clamping structures 91 symmetrically arranged outside the inlet second block 33 and outlet second block 34. The inlet second block 33 and outlet second block 34 are located at the inlet and outlet of the work roll 2, respectively. The inlet second block 33 and outlet second block 34 are equipped with bending roller hydraulic cylinders 6, whose internal structures are the same as those on the operation side A. The upper parts of the inlet clamping structure 91 and outlet clamping structure 91 are respectively symmetrically provided with a first upper clamping cylinder located at the inlet of the work roll 2 and a second upper clamping cylinder located at the outlet of the work roll 2. The lower parts of the inlet clamping structure 91 and outlet clamping structure 91 are respectively symmetrically provided with a first lower clamping cylinder located at the inlet of the work roll 2 and a second lower clamping cylinder located at the outlet of the work roll 2.

[0083] The aforementioned clamping structure 91 and clamping cylinder 92 are referred to as the shaft clamping device 9. The clamping structure 91 includes a clamping plate 911, with an upper through-hole 912 and a lower through-hole 913 respectively on its upper and lower parts. The upper through-hole 912 is used to pass through the first upper clamping cylinder or the second upper clamping cylinder, and the lower through-hole 913 is used to pass through the first lower clamping cylinder or the second lower clamping cylinder. The clamping cylinder 92 includes a clamping cylinder body 921, which passes through the aforementioned through-hole and is fixedly connected to the clamping plate 911. A clamping piston is provided inside the clamping cylinder body 921. The rod 922 has clamping trays 93 at its end. The two upper clamping trays 93 clamp the upper working roll 21 under the action of the two upper clamping cylinders 92 (the first upper clamping cylinder and the second upper clamping cylinder), and the two lower clamping trays 93 clamp the lower working roll 22 under the action of the two lower clamping cylinders 92 (the first lower clamping cylinder and the second lower clamping cylinder). When the working roll 2 is clamped, the bending roller cylinder makes a micro-movement in the vertical direction to adjust the plate shape by finely adjusting the roll gap convexity.

[0084] The clamping plate 911 is located in the middle of the clamping body 914 and the upper connecting body 915 and lower connecting body 916 are respectively set on the upper and lower ends of the clamping body 914. The clamping body 914 is connected to the upper connecting body 915 and lower connecting body 916 by vertical bolts, which facilitates the installation and disassembly of the clamping cylinder 92, and also facilitates transportation and storage.

[0085] The clamping cylinder 92 (shaft support cylinder) includes a clamping cylinder body 921 and a clamping cylinder cover 929 disposed at the end of the clamping cylinder body 921. The clamping cylinder body 921 passes through the above-mentioned through-hole and is fixedly connected to the clamping plate 911. A clamping piston rod 922 is disposed inside the clamping cylinder body 921. A clamping piston 923 is disposed between the clamping piston rod 922 and the clamping cylinder body 921. A clamping tray 93 is disposed at the end of the clamping piston rod 922. Clamping claws 94 are respectively disposed at the four corners of the clamping tray near the working roller. A tray pad 95 is disposed on the clamping claws 94 near the working roller.

[0086] A sliding sleeve 924 and a first guide sleeve 925 are provided between the clamping cylinder 921 and the clamping plate 911. The sliding sleeve 924 is fixedly connected to the clamping tray 93 by screws. A second limiting block 926, an outer sleeve 927, and a first rear cover 928 are sequentially provided on the outer wall of the clamping cylinder 921 on the side away from the sliding sleeve 924. When the clamping piston rod 922 slides in the clamping cylinder 921, it drives the clamping tray 93 to slide closer to the work roller. Under the action of the clamping tray 93, the clamping claw 94 gradually approaches the work roller and finally clamps the work roller. When the clamping piston rod 922 moves in the opposite direction, it drives the clamping piston rod 922, the clamping tray 93, and the clamping claw 94 to slide away from the work roller. When the clamping claw 94 moves away from the work roller, the second limiting block 926 on the outer wall of the clamping cylinder 921 plays a limiting role to prevent the clamping claw 94 from moving excessively and ensure that the clamping claw 94 is disengaged from the work roller.

[0087] After the clamping piston rod 922 and the fork head 931 of the clamping tray 93 are assembled and tightened, a screw 930 can be passed through to achieve a loosening effect (see [link]). Figure 24 Furthermore, in this application, all mating surfaces requiring screws and nuts can be laser-clad, which is rust-proof and wear-resistant, significantly improving the service life and reliability of these components.

[0088] See Figure 23The outer side of the working roller is provided with a working roller cylinder sleeve 23. The outer wall of the working roller cylinder sleeve 23 is provided with a keyway 231. The side of the clamping tray 93 near the working roller is also provided with a tray positioning block 96 (anti-rotation block). The position of the tray positioning block 96 corresponds exactly to the keyway 231. When the clamping claw 94 is in contact with the outer wall of the working roller cylinder sleeve 23, the tray positioning block 96 is just embedded in the keyway 231, thereby restricting the rotation of the working roller cylinder sleeve 23 and preventing the working roller shaft from rotating.

[0089] The cooperation between the pallet positioning block 96 and the keyway 231 improves the stability of equipment operation, effectively prevents unnecessary rotation of the work roll during operation, and ensures the stability and safety of the rolling process.

[0090] Meanwhile, the block 3 (inlet second block 33, outlet second block 34) of the transmission side B only contains the bending roller hydraulic cylinder 6, which is fixed on the frame 1 (archway) as a whole, and its internal structure is the same as that of the operation side A; the bending roller system adopts a short-stroke high-rigidity hydraulic cylinder to reduce the delay caused by hydraulic oil compression and improve dynamic response.

[0091] In the above embodiment, before changing the roll, the locking hydraulic cylinder 8 is in a retracted state, the bending roll hydraulic cylinder 6 is in a retracted state, and the shifting roll hydraulic cylinder 7 is in a calculated position. This position allows the groove between the shifting roll support sleeve 73 and the shifting roll rotating sleeve 76 to align with the bearing seat protrusion (upper lifting block 42 / lower lifting block 52) on the end face of the new roll after it has been pushed into place, so as to perform the next locking action.

[0092] During the roll changing process, the new work roll 2 and bearing housing move axially under the action of the track and enter the installation position of the frame 1. When it reaches the roller shifting hydraulic cylinder 7 on the operating side A, the roller shifting rotating sleeve 76 rotates under the action of the locking hydraulic cylinder 8 to lock the work roll 2. Then, the bending roller hydraulic cylinders 6 on the operating side A and the transmission side B are pushed out, separating the upper work roll 21 and the lower work roll 22. After that, the lower work roll 22 continues to move along the track towards the transmission side until the end faces of the upper and lower work rolls are aligned.

[0093] During the rolling process (with the shaft clamping device 9 on the transmission side B clamping the work roll 2), the bending roll hydraulic cylinder 6 raises and lowers the upper work roll 21 by pushing out and retracting, which can be used to control the distance between the upper and lower work rolls and thus control the plate shape; specifically, the bending roll piston rod 62 drives the bending roll cylinder body 61 and the upper guide sleeve 63 to move vertically upward, which drives the upper guide sleeve 63 to lift the upper lifting block 42 of the upper bearing seat 4, thereby causing the upper work roll 21 to be slightly raised, realizing precise fine adjustment of the roll gap crown and plate shape correction; the axial position of the upper and lower work rolls can be controlled by the four roller hydraulic cylinders 7 (first upper roller hydraulic cylinder, first lower roller hydraulic cylinder, second upper roller hydraulic cylinder and second lower roller hydraulic cylinder) respectively, which is used to control the plate shape.

[0094] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should be considered to be within the scope of this specification.

Claims

1. An integrated control device for bending and shifting rolls in a hot continuous rolling mill finishing unit, installed at one end of the working roll's operating side, with the other end of the working roll being the transmission side, wherein the working roll includes an upper working roll and a lower working roll arranged sequentially vertically, and both the upper and lower working rolls are provided with bearing seats on their exteriors; characterized in that, The integrated control device for bending and shifting rollers includes two blocks mounted on the frame and located at the inlet and outlet of the working rollers, respectively denoted as the inlet first block and the outlet first block. A bending roller hydraulic cylinder is correspondingly installed inside each of the inlet first block and the outlet first block. Shifting roller hydraulic cylinders are correspondingly installed on the upper and lower parts of the outer side of the inlet first block, the upper part of the outer side of the outlet first block, and the lower part of the outer side of the outlet first block. The two shifting roller hydraulic cylinders on the upper part of the inlet and outlet first blocks are connected via an upper bearing seat outside the upper working roller, and the two shifting roller hydraulic cylinders on the lower part of the inlet and outlet first blocks are connected via a lower bearing seat outside the lower working roller. Locking hydraulic cylinders are correspondingly installed on the exterior of each of the four shifting roller hydraulic cylinders. The block is provided with mounting holes for installing the bending roller hydraulic cylinder in the vertical direction. The bending roller hydraulic cylinder includes a bending roller cylinder body and a bending roller piston rod disposed inside the bending roller cylinder body. An upper guide sleeve and a lower guide sleeve are respectively provided on the upper and lower parts of the bending roller cylinder body. The bottom of the bending roller piston rod is connected to a connecting rod, and the bottom of the connecting rod is connected to the lower guide sleeve. A buffer sleeve is provided between the block and the bending roller cylinder body and the lower guide sleeve respectively.

2. The integrated control device for bending and shifting rolls in a hot continuous rolling mill as described in claim 1, characterized in that, A sealing ring is provided between the bending roller cylinder and the bending roller piston rod. The sealing ring has an annular structure, and a first protrusion and a second protrusion are respectively provided on the outer surface and the inner surface of the sealing ring. The first protrusion and the second protrusion are arc-shaped.

3. The integrated coordinated control device for bending rolls and shifting rolls in a hot continuous rolling mill as described in claim 2, characterized in that, The buffer sleeve is made of copper. A dustproof ring is also provided between the bending roller cylinder and the bending roller piston rod. The outer wall of the dustproof ring has a serrated structure and is made of HPU material.

4. The integrated coordinated control device for bending rolls and shifting rolls in a hot continuous rolling mill as described in claim 1, characterized in that, The roller shifting hydraulic cylinder includes a roller shifting cylinder barrel and a roller shifting piston rod disposed inside the roller shifting cylinder barrel. A roller shifting support sleeve is disposed outside the roller shifting cylinder barrel. A roller shifting guide sleeve and a roller shifting rotating sleeve are disposed outside the roller shifting support sleeve. A first limiting block is disposed at the end of the roller shifting support sleeve. The first limiting block is used to contact the end face of the bearing seat.

5. The integrated control device for bending and shifting rolls in a hot continuous rolling mill as described in claim 4, characterized in that, The locking hydraulic cylinder is located outside the rotating sleeve of the roller; The locking hydraulic cylinder includes a locking cylinder body and a locking piston rod disposed inside the locking cylinder body. A rotating block is provided at the end of the locking piston rod, and the rotating block is rotatably connected to the rotating sleeve of the roller.

6. The integrated control device for bending and shifting rolls in a hot continuous rolling mill as described in claim 4 or 5, characterized in that, It also includes an anti-rotation device for preventing the rotation of the roller support sleeve. The anti-rotation device includes guide posts and double-headed studs. The four guide posts are symmetrically placed in pairs on the upper and lower parts of the outer side of the first inlet block and the first outlet block, and are correspondingly connected to the four roller support sleeves. The double-ended stud is disposed inside the guide post, with one end of the double-ended stud screwed into the block body and the other end provided with a nut and a protective cover; a sliding bearing is also provided between the roller support sleeve and the guide post.

7. The integrated control device for bending and shifting rolls in a hot continuous rolling mill as described in claim 4 or 5, characterized in that, The hydraulic cylinder for the shunting roller also includes a displacement sensor arranged along the axial direction for real-time detection of the displacement of the piston rod of the shunting roller.

8. The integrated coordinated control device for bending rolls and shifting rolls in a hot continuous rolling mill as described in claim 1, characterized in that, The block has a first stop and a second stop on its two sides, which are respectively engaged with the two sides of the frame. The block has a hollowed-out part corresponding to the position of the second stop.

9. The integrated coordinated control device for bending rolls and shifting rolls in a hot continuous rolling mill as described in claim 1, characterized in that, The upper bearing housing includes an upper seat body and an upper lifting block disposed on the upper seat body, with both ends of the upper lifting block located on the upper parts of the two upper guide sleeves respectively; The lower bearing housing includes a lower housing body and a lower lifting block disposed on the lower housing body, with both ends of the lower lifting block located at the bottom of the two lower guide sleeves respectively.

10. The integrated control device for bending rolls and shifting rolls in a hot continuous rolling mill as described in claim 1, characterized in that, The transmission side is provided with an inlet second block and an outlet second block, and the inlet second block and the outlet second block are provided with bending roller hydraulic cylinders. The inlet second block and the outlet second block are provided with a shaft clamping device. The shaft clamping device includes a clamping structure and a clamping cylinder. The clamping cylinder includes a clamping cylinder body, a clamping cylinder cover disposed at the end of the clamping cylinder body, and a clamping piston rod disposed inside the clamping cylinder body. The end of the clamping piston rod is provided with a clamping tray, and clamping claws are respectively disposed at the four corners of the clamping tray. The working roller is provided with a working roller cylinder sleeve on its outside. The outer wall of the working roller cylinder sleeve is provided with a keyway. The clamping tray is provided with a tray positioning block on the side near the working roller. The position of the tray positioning block corresponds to the keyway.

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