Multifunctional test unit and test method thereof

Abstract

The invention belongs to the technical field of steel rolling, and relates to a multifunctional test unit and a test method thereof.The test unit comprises a left coiling machine, a left side platform device, a multifunctional rolling mill, a right side platform device, a right coiling machine, a left side single-piece feeding device and a right side single-piece feeding device; the multifunctional rolling mill can be switched between a four-roller system and a six-roller system; when the multifunctional rolling mill is a six-roller system, the left coiling machine, the left side platform device, the multifunctional rolling mill, the right side platform device and the right coiling machine are sequentially arranged in the rolling direction to form a coiling rolling unit. When the multifunctional rolling mill is a four-roller system, the left single-piece feeding device, the multifunctional rolling mill and the right single-piece feeding device are sequentially arranged in the rolling direction to form a single-piece rolling unit. According to the invention, the functions of single-sheet rolling / flattening and coiled rolling / flattening are integrated, so that the utilization rate of equipment is improved, and the construction and use costs are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of steel rolling, and relates to a multi-functional test unit and a test method thereof. Background Art

[0002] In the iron and steel industry, cold rolling of strip steel and skin pass rolling of strip steel are key links in the production of high-quality steel. In order to develop or verify new processes and new methods in this field, pilot tests are particularly important. Pilot tests can comprehensively evaluate and optimize the performance of new materials and new processes under conditions close to the actual production environment, so as to provide a reliable technical basis for large-scale production. However, the test units in reality often face many challenges. Due to the variety of pilot tests, parameters such as raw material steel grades, incoming thickness, and finished thickness are different. Therefore, the test unit needs to have a high degree of adaptability and flexibility. However, traditional test units are usually designed with strong pertinence and can only meet the test requirements of specific types. When different types or specifications of tests need to be carried out, it is often necessary to make major adjustments to the unit or replace equipment, which not only takes time and effort but also greatly increases the test cost.

[0003] In addition, in order to meet the increasingly diverse test requirements, an ideal test unit should have multi-functionality. However, traditional steel rolling test equipment is usually designed with a single function, such as only being able to perform coiling rolling or single-piece skin pass rolling. This design limits the application range of the equipment and cannot meet the requirement of quickly switching between rolling and skin pass modes on the same equipment. In actual operation, when it is necessary to switch from one working mode to another, it often takes a lot of time and manpower to adjust or replace the equipment, seriously affecting the test efficiency and flexibility.

[0004] On the other hand, there are also many problems in dealing with single-piece materials in existing equipment. Especially in the feeding device, its stability and accuracy are often insufficient. During rolling or skin pass rolling, the accurate feeding of single-piece materials is the key to ensuring the reliability of test results. However, due to design defects or insufficient control accuracy of the feeding device, problems such as material deviation or unsmooth conveying are likely to occur. These problems not only affect the smooth progress of the test but may also lead to deviations in test results, thus reducing the reliability and accuracy of the test.

[0005] Therefore, it is particularly important to develop a multi-functional test unit that can quickly switch working modes and adapt to various process requirements. Such a unit should possess a high degree of flexibility and versatility, being able to easily handle test requirements for different raw material steel grades, incoming material thicknesses, and finished product thicknesses. At the same time, its feeding device should have good stability and accuracy to ensure the accurate feeding and smooth conveyance of single-piece materials. Such a multi-functional test unit can not only improve test efficiency and accuracy but also significantly reduce test costs, providing strong technical support for new material development, new process verification, and product quality control. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a multi-functional test unit and its test method. Through modular design and a quick switching mechanism, various functions such as coiling rolling, coiling leveling, single-piece rolling, and single-piece leveling are realized, thereby improving the flexibility and test efficiency of the test unit.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] A multi-functional test unit includes a left coiler, a left side platform device, a multi-functional rolling mill, a right side platform device, a right coiler, a left single-piece feeding device, and a right single-piece feeding device, and the multi-functional rolling mill can switch between a four-high roll system and a six-high roll system.

[0009] When the multi-functional rolling mill is in a six-high roll system, the left coiler, the left side platform device, the multi-functional rolling mill, the right side platform device, and the right coiler are arranged in sequence along the rolling direction to form a coiling rolling unit.

[0010] When the multi-functional rolling mill is in a four-high roll system, the left single-piece feeding device, the multi-functional rolling mill, and the right single-piece feeding device are arranged in sequence along the rolling direction to form a single-piece rolling unit.

[0011] Further, the multi-functional rolling mill includes:

[0012] A frame;

[0013] A four-high roll system, composed of a pair of leveling rolls and a pair of common backup rolls;

[0014] A six-high roll system, composed of a pair of work rolls, a pair of intermediate rolls, and a pair of common backup rolls;

[0015] A roll changing device, configured on one side of the bottom of the frame, for supporting the free switching of the four-high roll system and the six-high roll system in the frame;

[0016] Among them, the sum of the diameters of the intermediate rolls and the working rolls in the six-roll roll system is equal to the diameter of the smoothing roll in the four-roll roll system, and the bearing seats of the intermediate rolls, the working rolls and the smoothing rolls are designed with equal width to achieve free switching between the four-roll roll system and the six-roll roll system in the frame.

[0017] Furthermore, the multifunctional rolling mill further comprises:

[0018] A working roll positive bending roll arranged in the frame;

[0019] The intermediate roll / smoothing roll positive bending roll is shared by the intermediate roll and the smoothing roll, and the opening width of the intermediate roll / smoothing roll positive bending roll and the working roll positive bending roll is the same.

[0020] Furthermore, the multifunctional rolling mill further comprises:

[0021] Four sets of intermediate roller axial transverse movement devices fixedly installed on one side of the frame, respectively corresponding to the upper intermediate rollers and the lower intermediate rollers in pairs, thereby realizing the axial movement of the intermediate rollers;

[0022] Among them, the intermediate roller / leveling roller bending roller is fixedly installed in the frame to keep the intermediate roller / leveling roller bending roller stationary when the intermediate roller is transversely moved, thereby reducing the width design size of the intermediate roller / leveling roller bending roller.

[0023] Furthermore, the intermediate roller axial transverse displacement pumping device comprises an oil cylinder, a frame, a slider and a locking pin, the frame is fixedly mounted on the frame, the oil cylinder adopts an inverted structure, and has a built-in displacement sensor, the slider is slidably mounted in the frame and connected to the piston of the oil cylinder to drive the sliding transverse movement;

[0024] Connecting blocks are provided on both sides of the bearing seat of the intermediate roller to respectively connect the two intermediate roller axial transverse movement pulling devices, and a first pin hole is provided on the connecting block, and a second pin hole corresponding to the first pin hole is provided in the slider, and the locking pin penetrates the first pin hole and the second pin hole to lock the bearing seat of the intermediate roller and the slider, and then the axial transverse movement of the intermediate roller is driven by the oil cylinder.

[0025] Furthermore, the structures of the left platform device and the right platform device are the same, and both include a mounting base, a platform sliding frame slidably arranged on the mounting base, and a hydraulic cylinder for driving the platform sliding frame to slide horizontally, so as to push the left platform device and the right platform device to switch between the working position and the standby position;

[0026] The mounting base is provided with a single-sheet feeding device mounting hole, so that when the multifunctional rolling mill is a four-roller roller system, the left-side single-sheet feeding device and the right-side single-sheet feeding device are respectively mounted on the mounting base;

[0027] A swing guide plate for connecting the coiler and the multi-functional rolling mill, a speed measuring roller, a tension meter and a thickness gauge for detecting the parameters of the steel coil are provided on the platform sliding frame body.

[0028] Further, the left single-piece feeding device and the right single-piece feeding device have the same structure, and both include:

[0029] Fixed slide rails, detachably installed on the mounting bases on both sides of the multi-functional rolling mill;

[0030] A sliding frame body, slidably arranged on the fixed slide rails;

[0031] A conveyor belt, arranged around the sliding frame body to convey the strip to the rolling mill inlet;

[0032] A pressing flower roller device, installed above the conveyor belt and arranged at one end of the conveyor belt close to the rolling mill;

[0033] An elastic slide plate, arranged below the pressing flower roller device, installed inside the sliding frame body, and forming a clamping space with the pressing flower roller device to clamp the conveyor belt;

[0034] A fixed slide seat, installed on the frame of the multi-functional rolling mill and slidably connected to the sliding frame body;

[0035] A push-pull oil cylinder, with both ends respectively connected to the fixed slide seat and the sliding frame body to drive the sliding frame body to move close to or away from the rolling mill along the fixed slide rails.

[0036] Further, the pressing flower roller device includes roller seats installed on the sliding frame body and located on both sides of the conveyor belt, and several flower rollers rotatably connected between the roller seats to press the strip on the conveyor belt.

[0037] Further, the elastic slide plate includes a slide plate and a fixed seat arranged at the bottom of the slide plate and fixedly connected to the sliding frame body. The fixed seat is connected to the slide plate through a telescopic sleeve, and a spring is arranged in the telescopic sleeve to adapt to strips of different thicknesses.

[0038] A test method for a multi-functional test unit, providing the multi-functional test unit as described above. This test method includes the following modes:

[0039] Coiling rolling mode: Switch the multi-functional rolling mill to a six-high roll system, adjust the left platform device and the right platform device to the working position, load the steel coil into the left coiler, lead the strip head through the left platform device, the multi-functional rolling mill and the right platform device and enter the right coiler. After setting the roll gap and establishing the tension, start the multi-functional rolling mill for reversible rolling;

[0040] Coiled leveling mode: Switch the multi-functional rolling mill to the four-high roll system, adjust the left platform device and the right platform device to the working position, load the steel coil into the left coiler, let the leading end pass through the left platform device, the multi-functional rolling mill and the right platform device and enter the right coiler. After setting the pressure and establishing the tension, start the multi-functional rolling mill for single-pass leveling;

[0041] Single-sheet rolling mode: Switch the multi-functional rolling mill to the six-high roll system, adjust the left platform device and the right platform device to the standby position and install the left single-sheet feeding device and the right single-sheet feeding device. Place the single-sheet steel plate on the conveyor belt of the left single-sheet feeding device. After setting the roll gap, start the unit for reciprocating rolling;

[0042] Single-sheet leveling mode: Switch the multi-functional rolling mill to the four-high roll system, adjust the left platform device and the right platform device to the standby position and install the left single-sheet feeding device and the right single-sheet feeding device. Place the single-sheet steel plate on the conveyor belt of the left single-sheet feeding device. After setting the roll gap, start the unit for single-pass leveling.

[0043] The beneficial effects of the present invention are as follows:

[0044] 1. This technical solution provides a multi-functional test unit and test method, equipped with a four / six-high double roll system, which can flexibly meet the cold rolling and leveling test requirements of small-size and small-batch specimens of various metal materials such as plain carbon steel, stainless steel, high-strength steel, automotive sheet, silicon steel, and aluminum alloy. Compared with the limitations of the single-function of traditional test equipment, this unit innovatively integrates the single-sheet rolling and coiled rolling functions, which not only improves the equipment utilization rate but also reduces the construction and use costs. This double roll system design enables it to quickly adapt to different test modes, providing an integrated solution for various process researches, demonstrating excellent practicality and economic benefits, and is especially suitable for scientific research institutions and enterprises to carry out diversified tests.

[0045] 2. In the six-high state, this unit, as a typical UC rolling mill, uses smaller work rolls and has the ability to roll extremely thin strips, meeting the test requirements of high-precision thin strip production. The various plate shape adjustment means (such as intermediate roll shifting and bending roll devices) it is equipped with significantly enhance the plate shape control ability, ensuring the high precision and stability of the rolling process. In the four-high state, the unit is converted into a typical leveling machine, using large-diameter leveling rolls, which are designed specifically for studying the leveling process, the leveling roll texturing technology, and the influence of the surface morphology of the textured roll on the steel plate surface and subsequent processes. This innovative design of dual-mode switching enables the unit to perform excellently in both thin strip rolling and leveling process verification, providing a reliable experimental platform for process optimization.

[0046] 3. The multi-functional rolling mill in the test unit realizes the free switching between four-high and six-high modes through its unique double-roll system design and efficient concept of component sharing. The equipment can flexibly meet various process requirements such as cold rolling and temper rolling, greatly improving its versatility and being particularly suitable for diverse scenarios such as pilot tests. The shared design of the backup rolls and the bending roll device reduces redundant components, not only lowering the manufacturing and maintenance costs, but also optimizing the equipment structure through the fixed bending roll cylinder and the compact roll-changing device, reducing the floor area. This compact design not only meets the high requirements for space in modern production but also reflects the forward-looking and innovative nature of the technology, bringing a new breakthrough to traditional rolling equipment;

[0047] The single-piece feeding device firmly presses the single-piece strip on the conveyor belt through the pressing flower roll device, thus significantly increasing the friction between the strip and the belt. This design not only enhances the conveying force, ensuring the stability of the strip during transportation without slipping, but also forms a certain tension between the strip and the belt when the strip enters the rolling mill, effectively improving the flatness of rolling and reducing waviness or warping. This innovative pressing method optimizes the conveying effect, directly improving the accuracy and surface quality of the rolled product, reflecting the practical value of the technical solution in improving production quality.

[0048] Other advantages, objectives, and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be learned from the practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings, where:

[0050] Figure 1 FIG. 15 is a schematic plan view of a multi-functional test unit in the state of a coiling rolling mill in the embodiment;

[0051] Figure 2 FIG. 19 is a front view of a multi-functional test unit in the state of a coiling rolling mill in the embodiment;

[0052] Figure 3 FIG. 23 is a schematic plan view of a multi-functional test unit in the state of a single-piece rolling mill in the embodiment;

[0053] Figure 4 FIG. 27 is a front view of a multi-functional test unit in the state of a single-piece rolling mill in the embodiment;

[0054] Figure 5 FIG. 31 is a schematic plan view of the left platform device in the embodiment;

[0055] Figure 6 Schematic plan view of the left platform device in the embodiment;

[0056] Figure 7 Schematic structural view of the multi-functional rolling mill in the embodiment;

[0057] Figure 8 Diagram of the multi-functional rolling mill in the six-high rolling state and the four-high leveling state respectively in the embodiment;

[0058] Figure 9 Schematic structural view of the multi-functional rolling mill in the six-high rolling state and the four-high leveling state respectively in the embodiment;

[0059] Figure 10 Schematic structural view of the positive bending roll in the multi-functional rolling mill in the embodiment;

[0060] Figure 11 Axonometric view of the intermediate roll axial transverse shifting device in the multi-functional rolling mill in the embodiment;

[0061] Figure 12 Cross-sectional view of the intermediate roll axial transverse shifting device in the multi-functional rolling mill in the embodiment;

[0062] Figure 13 Schematic structural view of the upper intermediate roll in the multi-functional rolling mill in the embodiment

[0063] Figure 14 Schematic structural view of the rolling line adjustment device in the multi-functional rolling mill in the embodiment;

[0064] Figure 15 Schematic structural view of the roll changing device in the multi-functional rolling mill in the embodiment.

[0065] Figure 16 Schematic structural view of the left single-piece feeding device in the embodiment;

[0066] Figure 17 Axonometric view of the left single-piece feeding device in the embodiment;

[0067] Figure 18 Schematic structural view of the belt tensioning device in the embodiment;

[0068] Figure 19 Schematic side cross-sectional view of the belt tensioning device in the embodiment;

[0069] Figure 20 Axonometric view of the centering device in the embodiment;

[0070] Figure 21 Axonometric view of the pressing flower roll device in the embodiment;

[0071] Figure 22Schematic structural diagram of the elastic skateboard in the embodiment.

[0072] Reference numerals: left coiler 1, left platform device 2, multi-functional rolling mill 3, right platform device 4, right coiler 5, left single-sheet feeding device 6, right single-sheet feeding device 7;

[0073] Left platform device 2: swing guide plate 21, platform turning roller 22, speed measuring roller 23, tensiometer 24, thickness gauge 25, platform centering device 26, mounting base 27, platform sliding frame body 28, single-sheet feeding device mounting hole 29, hydraulic cylinder 210, slide rail 211;

[0074] Multi-functional rolling mill 3: motor 31, gearbox 32, transmission shaft 33, frame 34, intermediate roll axial transverse shifting device 35, screw-down cylinder 36, rolling roll 37, roll changing device 38, rolling line adjusting device 39;

[0075] Intermediate roll axial transverse shifting device 35: oil cylinder 351, frame 352, slider 353, locking pin 354, sliding sleeve 355, connecting block 356, first pin hole 357;

[0076] Rolling roll 37: upper common support roll 371, lower common support roll 372, upper intermediate roll 373, lower intermediate roll 374, upper working roll 375, lower working roll 376, upper leveling roll 377, lower leveling roll 378, upper intermediate roll / leveling roll positive bending cylinder block 379, lower intermediate roll / leveling roll positive bending cylinder block 3710, upper working roll positive bending cylinder block 3711, lower working roll positive bending cylinder block 3712;

[0077] Roll changing device 38: high roll changing bench 381, low roll changing bench 382, drive motor 383;

[0078] Rolling line adjusting device 39: encoder 391, lead screw 392, lifting platform 393, moving wedge 394, fixed wedge 395, copper nut 396, hydraulic motor 397;

[0079] Left single-sheet feeding device 6: fixed slide rail 61, motor and drive roller 62, conveyor belt 63, belt tensioning device 64, centering device 65, pressing flower roller device 66, push-pull oil cylinder 67, fixed slide base 68, sliding frame body 69, roller 610, elastic skateboard 611;

[0080] Motor and drive roller 62: electric motor 621, drive roller 622;

[0081] Belt tensioning device 64: tensioning seat 641, fixed roller 642, adjusting roller 643, adjusting bolt 644;

[0082] Centering device 65: centering hydraulic motor 651, centering lead screw 652, centering nut 653, right push plate 654, left push plate 655, guide rod 656, fixed seat 657;

[0083] Pressing pattern roller device 66: roller seat 661, pattern roller 662, centering adjustment cross bar 663, centering adjustment baffle 664, outlet pressure plate 665;

[0084] Elastic slide plate 611: slide plate 6111, fixed seat 6112, telescopic sleeve 6113, spring 6114. Specific implementation mode

[0085] The following uses specific specific examples to illustrate the implementation mode of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0086] Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to the present invention; in order to better illustrate the embodiments of the present invention, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0087] In the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or position relationship, it is based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only for illustrative purposes and should not be construed as a limitation to the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0088] Please refer to Figures 1 to 22 , which is a multi-functional test unit, including a left coiler 1, a left side platform device 2, a multi-functional rolling mill 3, a right side platform device 4, a right coiler 5, a left single-piece feeding device 6 and a right single-piece feeding device 7, and the multi-functional rolling mill 3 can be switched between a four-high roll train and a six-high roll train;

[0089] When the multi-functional rolling mill 3 has a six-high roll train, the left coiler 1, the left side platform device 2, the multi-functional rolling mill 3, the right side platform device 4 and the right coiler 5 are arranged in sequence along the rolling direction to form a coiling rolling mill unit;

[0090] When the multi-functional rolling mill 3 has a four-high roll train, the left single-sheet feeding device 6, the multi-functional rolling mill 3 and the right single-sheet feeding device 7 are arranged in sequence along the rolling direction to form a single-sheet rolling mill unit.

[0091] The multi-functional rolling mill includes

[0092] a frame 34;

[0093] a four-high roll train, which consists of a pair of temper rolls and a pair of common backup rolls;

[0094] a six-high roll train, which consists of a pair of work rolls, a pair of intermediate rolls and a pair of common backup rolls;

[0095] a roll changing device 38, which is arranged on one side of the bottom of the frame and is used to support the free switching between the four-high roll train and the six-high roll train in the frame;

[0096] Wherein, the sum of the diameters of the intermediate roll and the work roll in the six-high roll train is equal to the diameter of the temper roll in the four-high roll train, and the bearing seats of the intermediate roll, the work roll and the temper roll adopt an equal-width design to realize the free switching between the four-high roll train and the six-high roll train in the frame.

[0097] The left coiler 1 and the right coiler 5 have the same structure, mainly composed of a motor, a speed reducer, a coiler barrel, a pressure roll, etc., and are equipped with a special loading and unloading coil lifting trolley, whose function is to apply tension to the strip steel and play an auxiliary rolling role. The coiler used in this application is a commonly used coiler in the prior art, so it will not be described in detail.

[0098] The left side platform device 2 and the right side platform device 4 have the same structure, and are transition devices connecting the coiler to the multi-functional rolling mill. The platform device used in this application is a commonly used platform device in the prior art, so it will not be described in detail. It mainly includes a swing guide plate 21, a platform turning roll 22 and a platform centering device 26 for connecting the coiler and the multi-functional rolling mill, a speed measuring roll 23, a tension meter 24 and a thickness gauge 25 for detecting the steel coil parameters;

[0099] The main difference from the rest of the prior art is that it further includes an installation base 27, a platform sliding frame 28 slidably arranged on the installation base 27, and a hydraulic cylinder 210 for driving the platform sliding frame 28 to slide horizontally. The installation base 27 and the platform sliding frame 28 are horizontally slidably connected through a slide rail 211. The swing guide plate 21, the platform turning roller 22, the speed measuring roller 23, the tensiometer 24, the thickness gauge 25, and the platform centering device 26 are all arranged on the platform sliding frame 28. The hydraulic cylinder 210 is used to drive the platform device to switch between the working position and the standby position, and bolt fixing positions are provided at both the working position and the standby position to facilitate the fixing of the platform sliding frame 28.

[0100] Further, the installation base 27 is provided with single-piece feeding device installation holes 29, so that when the multi-functional rolling mill has a four-high roll train, the left single-piece feeding device 6 and the right single-piece feeding device 7 are respectively installed on the corresponding installation bases.

[0101] The left single-piece feeding device 6 and the right single-piece feeding device 7 have the same structure, and both include:

[0102] A fixed slide rail 61, detachably installed on the installation bases 27 on both sides of the multi-functional rolling mill;

[0103] A sliding frame 69, slidably arranged on the fixed slide rail 61;

[0104] A conveyor belt 63, arranged around the sliding frame 69 to convey the strip to the entrance of the multi-functional rolling mill;

[0105] A pressing flower roller device 66, installed above the conveyor belt and arranged at one end of the conveyor belt close to the rolling mill;

[0106] An elastic sliding plate 611, arranged below the pressing flower roller device 66 and installed inside the sliding frame 69, and forming a clamping space with the pressing flower roller device 66 to clamp the conveyor belt;

[0107] A fixed slide seat 68, installed on the frame of the rolling mill;

[0108] A push-pull oil cylinder 67, with both ends respectively connected to the fixed slide seat 68 and the sliding frame 69 to drive the sliding frame 69 to move close to or away from the rolling mill along the fixed slide rail 61.

[0109] Embodiment 1

[0110] This embodiment shows a specific application of a multi-functional rolling mill with a six-high roll train, which is particularly suitable for high-precision rolling and shape control of strip steel in the cold rolling process.

[0111] 1. The equipment configuration is as follows:

[0112] 1.1 Configuration of the six-high roll train

[0113] The multi-functional rolling mill of this embodiment includes a frame 34 and a six-roll roll train. The six-roll roll train consists of the following components:

[0114] Work rolls: an upper work roll 375 and a lower work roll 376, with a specification of Φ100×500mm, a material of 9Cr2Mo, a hardness of HS95±2, a surface roughness of Ra0.4 - 0.8, a bearing housing material of 35CrMo, forged steel, and the bearings are needle roller + thrust ball bearings.

[0115] Intermediate rolls: an upper intermediate roll 373 and a lower intermediate roll 374, with a specification of Φ320×500mm, a material of 9Cr2Mo, a hardness of HS85±2, a surface roughness of Ra0.4 - 0.8, a bearing housing material of 35CrMo, forged steel, and the bearings are tapered roller bearings.

[0116] Common support rolls: an upper common support roll 371 and a lower common support roll 372, with a specification of Φ630×450mm, a material of 70Cr3Mo, a hardness of HS75±2, a surface roughness of Ra0.8 - 1.6, a bearing housing material of ZG35, and the bearings are cylindrical roller bearings.

[0117] Drive system: The upper intermediate roll 373 and the lower intermediate roll 374 serve as drive rolls and are sequentially connected to a gearbox 32 and a motor 31 (with a power of 400KW) through a transmission shaft 33 to achieve power transmission.

[0118] Bending roll device: It includes a positive bending roll for work rolls (with an upper work roll positive bending cylinder block 3711 and a lower work roll positive bending cylinder block 3712, a cylinder diameter of Φ50mm, and a stroke of 31mm), a positive bending roll for the upper intermediate roll / leveling roll (with an upper intermediate roll / leveling roll positive bending cylinder block 379, a cylinder diameter of Φ65mm, and a stroke of 54mm), and a positive bending roll for the lower intermediate roll / leveling roll (with a lower intermediate roll / leveling roll positive bending cylinder block 3710, a cylinder diameter of Φ65mm, and a stroke of 54mm).

[0119] Screw-down cylinder: A hydraulic automatic gauge control screw-down cylinder, which is one of the most important core actuators in the automatic control system for strip thickness. It controls the displacement and pressure of the hydraulic cylinder through an electro-hydraulic servo valve, enabling the rolling rolls to move up and down, thereby precisely controlling the roll gap and further achieving precise control of the sheet thickness. Its characteristics include a high response frequency, low friction, and high control accuracy. The screw-down cylinder uses an in-built high-precision displacement sensor to detect the displacement of the piston, and is also equipped with a pressure detection sensor. The cylinder type is a piston cylinder, and the piston size (cylinder diameter * stroke): Φ450×50mm, and the working oil pressure: 20MPa.

[0120] 1.2 Configuration of the platform device and the coiler

[0121] The structures of the left platform device 2 and the right platform device 4 are the same. Taking the left platform device 2 as an example, the length * diameter of the platform turning roller 22 is 500 * φ230 mm; the length * diameter of the speed measuring roller 23 is 500 * φ200 mm; the centering range of the platform centering device 26 is 120 - 400 mm, and the driving device is an oil motor; the hydraulic cylinder 210 has a stroke of 2000 m and a piston diameter of φ100 mm;

[0122] The structures of the left coiler 1 and the right coiler 5 are the same. Taking the left coiler 1 as an example, the coiler motor power: 75 KW, the maximum coiling tension: 20 KN, the coiler reel diameter: φ508 mm, the maximum reel speed: 100 rpm, the effective length of the reel: 530 mm.

[0123] 1.3. Configuration of the single - sheet feeding device

[0124] The structures of the left single - sheet feeding device 6 and the right single - sheet feeding device 7 are the same, and are used to feed the strip into the rolling mill for rolling or leveling. Taking the left single - sheet feeding device 6 as an example, it includes the following components: a fixed slide rail 61, a sliding frame body 69, a conveyor belt 63, a pressing flower roller device 66, an elastic slide plate 611, a fixed slide seat 68, a push - pull oil cylinder 67, and other auxiliary components.

[0125] Fixed slide rail 61 and sliding frame body 69: The fixed slide rail 61 is made of high - strength steel, is strip - shaped, and is fixedly installed on the inlet side of the rolling mill frame as the support foundation of the whole device. The sliding frame body 69 is a rectangular frame structure and can be slidably connected to the fixed slide rail 61 through sliders or rollers 610 to ensure its smooth movement on the fixed slide rail 61.

[0126] Conveyor belt 63: The conveyor belt 63 is made of wear - resistant rubber material and is wound around the sliding frame body 69. Its width is 500 mm, and its length is designed to be about 3000 mm according to the size of the sliding frame body 69. The conveyor belt 63 is driven by a driving roller 622 and a turning roller. The driving roller 622 is installed at one end of the sliding frame body 69 away from the rolling mill, and the turning roller is installed at one end close to the rolling mill. The surface of the driving roller 622 is knurled, and its diameter is The length is 380 mm to increase the friction with the conveyor belt 63, and the diameter of the turning roller is The length is 380 mm. The driving roller 622 is connected to the motor 621 installed on the sliding frame body 69 through a roller chain. The power of the motor 621 is 1.1 kW, the speed is 1400 revolutions per minute, and the belt transportation speed is controlled at 0 - 45 m / min.

[0127] Pressing Pattern Roll Device 66: The pressing pattern roll device 66 is installed above the conveyor belt 63, near one end of the rolling mill, and is used to press the strip onto the conveyor belt 63. This device includes a roll seat 661 and a pattern roll 662. There are two roll seats 661, which are respectively fixed on the sliding frame body 69 and located on both sides of the conveyor belt 63. The two pattern rolls 662 are rotatably connected between the roll seats 661 through bearings. The roll shaft diameter of each pattern roll 662 is The roll diameter is 450 mm in length. The surface of the roll is provided with patterns to enhance the gripping force. Each pattern roll has three rolls. In addition, a centering adjustment cross bar 663 is provided between the roll seats 661. A strip-shaped hole is opened on the centering adjustment cross bar 663, and the centering adjustment baffle 664 is slidably connected through bolts. The centering adjustment baffle 664 can adjust its position left and right along the strip-shaped hole, and the centering range is 100 - 380 mm to prevent the strip from running off during transportation.

[0128] Furthermore, an outlet pressure plate 665 is provided at the outlet of the pressing pattern roll device 66 to prevent the strip from warping and further ensure the reliability of transporting the strip.

[0129] Elastic Slide Plate 611: The elastic slide plate 611 is arranged below the pressing pattern roll device 66, installed inside the sliding frame body 69, and forms a clamping space with the pattern roll 662 to clamp the conveyor belt 63. The elastic slide plate 611 includes a slide plate 6111 and a fixed seat 6112. The slide plate 6111 is a flat steel plate, 450 mm long and 500 mm wide; the fixed seat 6112 is welded to the sliding frame body 69 and is connected to the slide plate 6111 through a telescopic sleeve 6113. A spring 6114 is provided inside the telescopic sleeve 6113, and the elastic coefficient of the spring 6114 is 50 N / mm, so that the slide plate 6111 can float up and down by about 20 mm to adapt to different strips with a thickness between 2 mm and 10 mm.

[0130] Fixed Slide Seat 68 and Push-Pull Oil Cylinder 67: The fixed slide seat 68 is a steel member, fixed on the rolling mill frame, and is slidably connected to the sliding frame body, and also plays a role in supporting the sliding frame body. The push-pull oil cylinder 67 is a hydraulic drive device, with a cylinder diameter of The stroke is 1000 mm. One end of it is hinged to the fixed slide seat 68, and the other end is hinged to the sliding frame body 69, and is used to drive the sliding frame body 69 to move closer to or away from the rolling mill along the fixed slide rail 61.

[0131] Centering device 65: The centering device 65 is arranged on the side of the pressing roller device 66 away from the rolling mill, and is used to adjust the plate strip to the center position of the conveyor belt 63. The device includes a centering hydraulic motor 651, a centering screw 652, a centering nut 653, a right push plate 644, a left push plate 655, a guide rod 656 and a fixed seat 657. Two fixed seats 657 are fixed on the sliding frame 69 and are located on both sides of the conveyor belt 63. The centering screw 652 is 1000mm long, with left-handed and right-handed threads at both ends, respectively, and is connected to the centering hydraulic motor 651 (power 3kW). The guide rod 656 is parallel to the centering screw 652, and assists the right push plate 644 and the left push plate 655 to move. The right push plate 644 and the left push plate 655 are threadedly connected to the centering screw 652 through the centering nut 653. When the centering screw 652 rotates, the two push plates move inward or outward synchronously to adjust the position of the plate belt.

[0132] Belt tensioning device 64: The belt tensioning device 64 is installed on the lower side of the sliding frame 69 and is used to adjust the tension of the conveying belt 63. The device includes a tensioning seat 641, two fixed rollers 642 and an adjustment roller 643. The tensioning seat 641 is a steel frame, and the diameter of the fixed roller 642 is Rotatably mounted at both ends of the tensioning seat 641. The diameter of the adjustment roller 643 is Located between the two fixed rollers 642, it is slidably connected to the tensioning seat 641 through a vertical slide groove. The adjustment roller 643 is threadedly connected to the adjusting bolt 644, and the diameter of the adjusting bolt 644 is By rotating the adjusting bolt 644 , the adjusting roller 643 can be moved up and down by about 50 mm, thereby adjusting the tension of the conveying belt 63 .

[0133] The specific parameters of the unit in this mode are as follows:

[0134] Maximum rolling pressure: 5000KN

[0135] Rolling speed: 0~150m / min

[0136] Pressing method: full hydraulic pressing

[0137] Press down cylinder diameter:

[0138] Maximum opening: 20mm

[0139] Material thickness: 1-4mm

[0140] Finished product thickness: 0.1-2.0mm

[0141] Intermediate roller axial lateral movement distance: 160mm

[0142] Frame arch section: 420mm×390mm

[0143] Main drive motor: 400KW

[0144] Rolling torque: 20KN*m.

[0145] 2. The operation process is as follows:

[0146] Roll change preparation: A roll change device 38 is used. The roll change device 38 adopts a simple gantry structure (conventional structure, no further description is given), including a high roll change gantry 381 and a low roll change gantry 382, ​​with a transmission motor 383 (power 3KW, with a lead screw device arranged in the roll change gantry for pushing or pulling the roll). The upper intermediate roll 373 and the lower intermediate roll 374, the upper working roll 375 and the lower working roll 376 are respectively installed in pairs in the frame 34. When changing the rolls, the lower intermediate roll 374 and the lower working roll 376 carry the upper working roll 375 and the upper intermediate roll 373 respectively through the pad, and are pushed out or pushed into the frame along the roll change track, and the upper intermediate roll 373 and the lower intermediate roll 374 are installed first, and then the upper working roll 375 and the lower working roll 376 are installed.

[0147] When changing the intermediate roll, the high roll changing stand 381 is used alone, and the track on the stand is flush with the track of the lower intermediate roll in the frame. When changing the working roll, the high roll changing stand 381 is combined and connected with the low roll changing stand 382, ​​and the track on the stand is flush with the track of the lower working roll in the frame.

[0148] Axial lateral adjustment of the intermediate roller: The axial adjustment of the intermediate roller is achieved through four sets of intermediate roller axial lateral displacement pumping devices 35 (corresponding to the upper intermediate roller 373 and the lower intermediate roller 374 respectively). Each set of devices includes a cylinder 351 (cylinder diameter Φ100mm, stroke 160mm, built-in displacement sensor), a frame 352, a slider 353 and a locking pin 354. The slider 353 is locked with the connecting block 356 on the intermediate roller bearing seat by the locking pin 354, and the cylinder 351 drives the slider 353 to move horizontally, with an adjustment range of 0-160mm to ensure that it can adapt to strips of different widths.

[0149] This embodiment uses an intermediate roller as a transmission roller, so the intermediate roller axial transverse movement pulling device 35 needs to avoid the transmission shaft. By adopting four sets of intermediate roller axial transverse movement pulling devices 35, which are arranged in pairs on both sides of the bearing seats of the upper intermediate roller 373 and the lower intermediate roller 374, the transmission shaft is avoided and the lateral movement of the upper intermediate roller 373 and the lower intermediate roller 374 is achieved; and a displacement sensor is installed in the oil cylinder 351 to accurately control the axial transverse movement distance of the intermediate roller; and the oil cylinder 351 adopts an inverted structure, which makes the maintenance of the subsequent oil cylinder 351 simpler.

[0150] Specifically, a first pin hole 357 is provided on the connecting block 356, a second pin hole corresponding to the first pin hole 357 is provided in the slider 353, and the locking pin 354 passes through the first pin hole and the second pin hole to lock the bearing seat of the intermediate roll with the slider, and then the axial transverse movement of the intermediate roll is driven by the oil cylinder; a sliding sleeve 355 is provided in the second pin hole to facilitate the insertion and extraction of the locking pin 354.

[0151] Adjustment of the rolling line height: The rolling line height is adjusted by using the rolling line adjustment device 39, which includes an encoder 391, a lead screw 392, a lifting platform 393, a moving wedge 394, a fixed wedge 395, a copper nut 396 and a hydraulic motor 397. The lifting platform is vertically slidably arranged in the frame and is used to place the bearing seat of the lower common support roll, so as to adjust the rolling line height by adjusting the height of the lifting platform. The hydraulic motor 97 (working oil pressure 10 MPa) drives the lead screw 392 to rotate, so that the two moving wedges 394 move relative to or towards each other (the inclined wedge angle is 11°, and the horizontal stroke is 300 mm), and the height of the lifting platform 393 is adjusted, thereby accurately controlling the rolling line height.

[0152] Its working principle is as follows: Two fixed wedges are fixed to the bottom surface of the frame window, and copper nuts are installed in both of the two moving wedges, and the copper nuts are fixed together with the moving wedges. The threads in the two copper nuts are left-handed threads and right-handed threads respectively. The lead screw has two sections of threads, which are left-handed threads and right-handed threads respectively, and are matched with the corresponding copper nuts; the lead screw connects the two copper nuts together with the two moving wedges. The lead screw is driven by a hydraulic motor. When the lead screw rotates, the two moving wedges will move relative to or towards each other along the axial direction of the lead screw. Under the action of the mating inclined surfaces of the moving wedges and the fixed wedges, the moving wedges and the lifting platform will change in height.

[0153] The relationship between the target value of the height change and the number of turns of the lead screw rotation is calculated through the lead screw pitch, inclined surface angle, etc. The start and stop of the hydraulic motor are controlled by the encoder counting, so as to realize the closed-loop control of the rolling line height adjustment.

[0154] In another embodiment, the lifting of the lifting platform 393 can also be driven by replacing the driving mechanism composed of an encoder, a lead screw, two moving wedges, two fixed wedges, two copper nuts and a hydraulic motor with other driving devices.

[0155] Gauge control: The gauge cylinder 36 (piston size Φ450×50 mm, working oil pressure 20 MPa) is arranged on the top of the frame and presses down the upper common support roll 371. High-precision displacement sensors and pressure detection sensors are built in the oil cylinder, and the roll gap is controlled by an electro-hydraulic servo valve to ensure uniform strip thickness.

[0156] Specifically, it includes the following two test modes:

[0157] 2.1 Coiled rolling mode:

[0158] The left platform device 2 and the right platform device 4 are in their working positions by using their respective hydraulic cylinders 210.

[0159] The steel coil is loaded onto the left coiler 1 by a trolley, and the leading end passes through the left platform device 2, the multi-functional rolling mill 3, and the right platform device 4 and enters the right coiler 5.

[0160] Set the roll gap according to the process requirements, press the strip steel, and the left and right coilers tighten the strip steel to establish tension.

[0161] Start the multi-functional rolling mill 3 to complete reversible rolling according to the process.

[0162] 2.2 Single-piece rolling mode:

[0163] The left platform device 2 and the right platform device 4 leave their working positions and enter the standby position by using their respective hydraulic cylinders 210; and the left single-piece feeding device 6 and the right single-piece feeding device 7 are installed on the left and right sides of the multi-functional rolling mill.

[0164] Place a single steel plate on the conveyor belt 63 of the left single-piece feeding device 6.

[0165] Set the roll gap according to the process requirements, adjust the roll gap, start the unit, and the conveyor belt 63 feeds the steel plate into the roll gap for rolling.

[0166] After rolling, the steel plate enters the right single-piece feeding device 7 and then undergoes reciprocating rolling according to the process.

[0167] Furthermore, the unit is also equipped with a displacement sensor for detecting the roll gap, a pressure sensor for measuring the rolling force, a tensiometer for measuring the tension, a speedometer, etc., and has a roll gap control mode, an AGC control mode, a second flow control mode, etc., and can simultaneously measure and record the data during the rolling process.

[0168] Among them, the working process of the single-piece feeding device is as follows:

[0169] The push-pull oil cylinder 67 expands and contracts to drive the sliding frame body 69 to move along the fixed slide rail 61 to a working position close to the rolling mill.

[0170] The motor 621 drives the transmission roller 622 through a roller chain to start the conveyor belt 63.

[0171] The operator places the strip on the conveyor belt 63, and the strip moves towards the rolling mill entrance along with the conveyor belt 63.

[0172] The centering device 65 is started, the centering hydraulic motor 651 drives the centering lead screw 652 to rotate, and the right push plate 644 and the left push plate 655 move inwards synchronously to adjust the strip to the center of the conveyor belt 63.

[0173] When the strip reaches the pressing flower roll device 66, the flower roll 662 presses it against the conveyor belt 63, and the centering adjustment baffle 664 prevents the strip from running off track.

[0174] The elastic slide plate 611 supports the conveyor belt 63 through the elastic action of the spring 6114 and adapts to the thickness of the strip, ensuring that the strip is closely attached to the conveyor belt 63.

[0175] Finally, the strip is smoothly fed into the mill entrance for subsequent processing.

[0176] 3. Technical advantages

[0177] High-precision shape control: Through the coordinated action of the work roll positive bending roll and the intermediate roll positive bending roll, as well as the axial transverse shift adjustment of the intermediate roll, multi-dimensional shape control is achieved.

[0178] Compact design: The intermediate roll / skin pass roll positive bending roll is fixedly installed, reducing the width of the housing window and making the equipment more miniaturized.

[0179] Process flexibility: The small-diameter work roll (Φ100mm) is suitable for high-precision cold rolling and meets the production requirements of thin strip steel.

[0180] Embodiment 2

[0181] This embodiment demonstrates the specific application of a multi-functional mill under a four-roll roll system, which is particularly suitable for skin pass treatment of strip steel and improvement of surface quality. The differences between this embodiment and Embodiment 1 are as follows:

[0182] 1. The equipment configuration is as follows:

[0183] 1.1. Configuration of the four-roll skin pass mode

[0184] The multi-functional mill in this embodiment includes a housing 34 and a four-roll roll system. The four-roll roll system consists of the following components:

[0185] Skin pass rolls: The upper skin pass roll 377 and the lower skin pass roll 378, with specifications of Φ420×500mm, made of 9Cr2Mo, hardness of HS95±2, surface roughness of Ra0.4 - 0.8, and the bearing housing material is 35CrMo, forged steel, and the bearings use tapered roller bearings.

[0186] Common support rolls: The upper common support roll 371 and the lower common support roll 372, with specifications of Φ630×450mm, made of 70Cr3Mo, hardness of HS75±2.

[0187] Drive system: The upper skin pass roll 377 and the lower skin pass roll 378 serve as drive rolls and are connected to the gearbox 32 and the motor 31 through the drive shaft 33.

[0188] Bending roll device: Positive bending roll for upper intermediate roll / planishing roll (with upper intermediate roll / planishing roll positive bending cylinder block 379, cylinder diameter Φ65mm, stroke 54mm) and positive bending roll for lower intermediate roll / planishing roll (with lower intermediate roll / planishing roll positive bending cylinder block 3710, cylinder diameter Φ65mm, stroke 54mm), shared with the six-roll mode.

[0189] Bending cylinder: The hydraulic automatic gauge control bending cylinder is one of the most important core actuators in the automatic strip thickness control system. It controls the displacement and pressure of the hydraulic cylinder through an electro-hydraulic servo valve, causing the roll to move up and down, thereby precisely controlling the roll gap and then achieving precise control of the sheet thickness. Its characteristics include high response frequency, low friction, and high control accuracy. The bending cylinder uses a built-in high-precision displacement sensor to detect the displacement of the piston, and is also equipped with a pressure detection sensor. The cylinder type is a piston cylinder, and the piston size (cylinder diameter * stroke): Φ450×50mm, working oil pressure: 20MPa;

[0190] 1.2 Configuration of single-piece feeding device

[0191] The structures of the left single-piece feeding device 6 and the right single-piece feeding device 7 are the same, and are used to feed the strip into the rolling mill for rolling or planishing. Taking the left single-piece feeding device 6 as an example, the structure of this embodiment is basically the same as that of Embodiment 1, except for the following detailed adjustments to meet different production requirements.

[0192] Difference description

[0193] Pressing flower roll device 66: In this embodiment, the pressing flower roll device 66 includes three flower rolls 662 or six flower rolls 662, and the diameter of each flower roll 662 is 450mm in length. Compared with Embodiment 1, the number of flower rolls is increased. This design is suitable for transporting wider or heavier strips (such as strips with a width exceeding 600mm) to provide a more uniform pressing force.

[0194] Centering device 65: The centering hydraulic motor 651 is replaced with a model with a larger power (5kW) to provide a stronger driving force to meet the centering requirements of strips with a width of up to 800mm or a greater weight.

[0195] Conveyor belt 63: The width of the conveyor belt 63 is increased to 600mm to match the transportation requirements of wider strips. Correspondingly, the width of the sliding frame body needs to be increased to 700mm.

[0196] The specific parameters of the unit in this mode are as follows:

[0197] Maximum rolling pressure: 5000KN

[0198] Rolling speed: 0~150m / min

[0199] Pressing method: full hydraulic pressing

[0200] Diameter of the pressing cylinder:

[0201] Maximum opening: 20 mm

[0202] Raw material thickness: 1 - 4 mm

[0203] Finished product thickness: 0.1 - 2.0 mm

[0204] Axial transverse movement distance of the intermediate roll: 160 mm

[0205] Cross-section of the housing: 420 mm × 390 mm

[0206] Main drive motor: 400 KW

[0207] Rolling torque: 20 KN*m.

[0208] 2. Operating process

[0209] Roll changing preparation: Using the high roll changing bench 381 in the roll changing device 38, cooperating with the drive motor 383, install the upper leveling roll 377 and the lower leveling roll 378 in pairs into the housing 34. During roll changing, the lower leveling roll 378 is carried on the upper leveling roll 377 through a spacer block and is pushed out or into the housing along the roll changing track.

[0210] Adjustment of the rolling line height: Similar to Embodiment 1, use the rolling line adjustment device 39 to adjust the height of the lifting platform 393 to ensure correct contact between the leveling roll and the strip steel.

[0211] Pressing control: The pressing cylinder 36 controls the pressure of the upper common backup roll 371 through an electro-hydraulic servo valve to adjust the roll gap and ensure the flatness of the strip steel.

[0212] Bending roll adjustment: Adjust the bending degree of the leveling roll through the intermediate roll / leveling roll positive bending roll device to optimize the strip shape and surface quality.

[0213] Specifically, it includes the following two test modes:

[0214] 2.1 Coiling and leveling mode:

[0215] The left platform device and the right platform device use their respective hydraulic cylinders 210 to be in the working position;

[0216] Load the steel coil onto the left coiler 1 using a trolley, and let the leading end pass through the left platform device 2, the multi-functional rolling mill 3, the right platform device 4 and enter the right coiler 5;

[0217] Set the pressure according to the process requirements, clamp the strip steel, and the left and right coilers tighten the strip steel to establish tension;

[0218] Start the multi-functional rolling mill 3 to carry out single-pass skin pass rolling according to the process.

[0219] 2.2 Single-piece skin pass mode:

[0220] The left platform device 2 and the right platform device 4 use their respective hydraulic cylinders 210 to move away from the working position and enter the standby position; and the left single-piece feeding device 6 and the right single-piece feeding device 7 are installed on the left and right sides of the multi-functional rolling mill;

[0221] Place a single steel plate on the conveyor belt 63 of the left single-piece feeding device 6;

[0222] The steel plate after skin pass rolling enters the right single-piece feeding device 7; Skin pass rolling is generally only carried out in one pass. If secondary or multiple skin pass rolling is required, repeat the above operations;

[0223] 3. Technical advantages

[0224] Excellent skin pass effect: The large-diameter skin pass roll (Φ420mm) enhances the skin pass ability of the strip steel and improves the surface finish.

[0225] Component commonality: Sharing the backup roll and the positive bending roll device with the six-high mode reduces the equipment cost.

[0226] Convenient operation: The bench-type roll changing device simplifies the skin pass roll changing process and adapts to various process requirements.

[0227] Through the above two embodiments, the application of the multi-functional rolling mill in the six-high rolling mode and the four-high skin pass mode is fully demonstrated. In Embodiment 1, high-precision cold rolling is achieved in the six-high mode through small-diameter work rolls and multiple means of shape control. In Embodiment 2, the strip steel surface quality is optimized in the four-high mode by using large-diameter skin pass rolls. Through the double roll system design, shared components and compact structure, the equipment takes into account flexibility and economy, reflecting the practicality and innovation of this application.

[0228] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A multifunctional testing unit, characterized in that: It includes a left coiler, a left platform device, a multifunctional rolling mill, a right platform device, a right coiler, a left single-sheet feeding device and a right single-sheet feeding device, and the multifunctional rolling mill can switch between a four-roller system and a six-roller system; When the multifunctional rolling mill is a six-roller system, the left coiler, the left platform device, the multifunctional rolling mill, the right platform device and the right coiler are arranged in sequence along the rolling direction to form a coiling rolling unit; When the multifunctional rolling mill is a four-roller system, the left-side single-sheet feeding device, the multifunctional rolling mill and the right-side single-sheet feeding device are arranged in sequence along the rolling direction to form a single-sheet rolling unit.

2. The multifunctional testing machine set according to claim 1, characterized in that: The multifunctional rolling mill comprises: frame; Four-roller system, consisting of a pair of leveling rollers and a pair of common support rollers; The six-roller system consists of a pair of working rolls, a pair of intermediate rolls and a pair of common support rolls; A roll changing device, arranged at one side of the bottom of the frame, for supporting free switching between a four-roller system and a six-roller system in the frame; Among them, the sum of the diameters of the intermediate rolls and the working rolls in the six-roll roll system is equal to the diameter of the smoothing roll in the four-roll roll system, and the bearing seats of the intermediate rolls, the working rolls and the smoothing rolls are designed with equal width to achieve free switching between the four-roll roll system and the six-roll roll system in the frame.

3. The multifunctional testing machine set according to claim 2, characterized in that: The multifunctional rolling mill also includes: A working roll positive bending roll arranged in the frame; The intermediate roll / smoothing roll positive bending roll is shared by the intermediate roll and the smoothing roll, and the opening width of the intermediate roll / smoothing roll positive bending roll and the working roll positive bending roll is the same.

4. The multifunctional testing machine set according to claim 3, characterized in that: The multifunctional rolling mill also includes: Four sets of intermediate roller axial transverse movement devices fixedly installed on one side of the frame, respectively corresponding to the upper intermediate rollers and the lower intermediate rollers in pairs, thereby realizing the axial movement of the intermediate rollers; Among them, the intermediate roller / leveling roller bending roller is fixedly installed in the frame to keep the intermediate roller / leveling roller bending roller stationary when the intermediate roller is transversely moved, thereby reducing the width design size of the intermediate roller / leveling roller bending roller.

5. The multifunctional testing machine set according to claim 4, characterized in that: The intermediate roller axial transverse movement pumping device comprises an oil cylinder, a frame, a slider and a locking pin. The frame is fixedly mounted on the frame. The oil cylinder adopts an inverted structure and has a built-in displacement sensor. The slider is slidably mounted in the frame and connected to the piston of the oil cylinder to drive the sliding transverse movement. Connecting blocks are provided on both sides of the bearing seat of the intermediate roller to respectively connect the two intermediate roller axial transverse movement pulling devices, and a first pin hole is provided on the connecting block, and a second pin hole corresponding to the first pin hole is provided in the slider, and the locking pin penetrates the first pin hole and the second pin hole to lock the bearing seat of the intermediate roller and the slider, and then the axial transverse movement of the intermediate roller is driven by the oil cylinder.

6. The multifunctional testing machine set according to claim 1, characterized in that: The left platform device and the right platform device have the same structure, both of which include a mounting base, a platform sliding frame slidably arranged on the mounting base, and a hydraulic cylinder for driving the platform sliding frame to slide horizontally, so as to push the left platform device and the right platform device to switch between the working position and the standby position; The mounting base is provided with a single-sheet feeding device mounting hole, so that when the multifunctional rolling mill is a four-roller roller system, the left-side single-sheet feeding device and the right-side single-sheet feeding device are respectively mounted on the mounting base; The platform sliding frame is provided with a swinging guide plate for connecting the coiler and the multifunctional rolling mill, and a speed measuring roller, a tension meter and a thickness gauge for detecting the parameters of the steel coil.

7. The multifunctional testing machine set according to claim 6, characterized in that: The left-side single-piece feeding device and the right-side single-piece feeding device have the same structure, and both include: Fixed slide rails, which can be detachably mounted on the mounting bases on both sides of the multifunctional rolling mill; A sliding frame is slidably disposed on the fixed slide rail; A conveyor belt is disposed on the sliding frame in a loop to convey the plate strip to the entrance of the rolling mill; A pressing pattern roller device is installed above the conveyor belt and arranged at one end of the conveyor belt close to the rolling mill; An elastic slide plate is arranged below the pressing pattern roller device and installed inside the sliding frame, and forms a clamping space with the pressing pattern roller device to clamp the conveyor belt; The fixed slide is installed on the frame of the multifunctional rolling mill and is slidably connected with the sliding frame body; The push-pull oil cylinder has two ends respectively connected to the fixed slide and the sliding frame to drive the sliding frame to move closer to or away from the rolling mill along the fixed slide rail.

8. The multifunctional testing machine set according to claim 7, characterized in that: The pressing pattern roller device comprises roller seats installed on the sliding frame and located on both sides of the conveying belt and a plurality of pattern rollers rotatably connected between the roller seats to press the plate belt onto the conveying belt.

9. The multifunctional testing machine set according to claim 7, characterized in that: The elastic slide plate comprises a slide plate and a fixing seat arranged at the bottom of the slide plate and fixedly connected to the sliding frame body. The fixing seat is connected to the slide plate via a telescopic sleeve, and a spring is arranged in the telescopic sleeve to adapt to plate strips of different thicknesses.

10. A test method for a multifunctional test unit, characterized in that: A multifunctional testing machine according to any one of claims 1 to 9 is provided, wherein the testing method comprises the following modes: Coil rolling mode: switch the multifunctional rolling mill to the six-roller system, adjust the left platform device and the right platform device to the working position, load the steel coil into the left coiler, and lead the steel coil through the left platform device, the multifunctional rolling mill and the right platform device to enter the right coiler. After setting the roll gap and establishing the tension, start the multifunctional rolling mill for reversible rolling. Coil leveling mode: switch the multifunctional rolling mill to the four-roller system, adjust the left platform device and the right platform device to the working position, load the steel coil into the left coiler, and lead the steel coil through the left platform device, the multifunctional rolling mill and the right platform device to enter the right coiler. After setting the pressure and establishing the tension, start the multifunctional rolling mill for single-pass leveling; Single-sheet rolling mode: switch the multifunctional rolling mill to the six-roller system, adjust the left platform device and the right platform device to the standby position, install the left single-sheet feeding device and the right single-sheet feeding device, place the single steel plate on the conveyor belt of the left single-sheet feeding device, set the roll gap and start the unit for reciprocating rolling; Single-piece leveling mode: switch the multifunctional rolling mill to the four-roller system, adjust the left platform device and the right platform device to the standby position and install the left single-piece feeding device and the right single-piece feeding device, place the single steel plate on the conveyor belt of the left single-piece feeding device, set the roll gap and start the unit for single-pass leveling.

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