A steel strip rolling mill and a steel strip rolling method

Abstract

The application provides a steel strip rolling mill and a steel strip rolling method. The steel strip rolling mill comprises a rack, a work roller assembly and a pressure regulating roller assembly arranged on the rack. The work roller assembly comprises an upper work roller and a lower work roller which can rotate relative to the rack, and a rolling channel is formed between the upper work roller and the lower work roller. The pressure regulating roller assembly comprises a first pressure regulating roller arranged above the upper work roller, and the first pressure regulating roller is provided with a first roller surface at one end close to an operation side, and the first roller surface is arranged tangentially with a work roller surface of the upper work roller. By arranging the pressure regulating roller assembly, the first roller surface of the first pressure regulating roller close to the operation side is arranged to press the upper work roller, and the rolling pressure of the upper work roller away from the driving side can overcome the reaction force generated in the process of rolling the steel strip, so that the rolling channel of the work roller assembly can be kept stable in the process of rolling the steel strip, and the deviation of the transverse thickness of the steel strip can be avoided, so that the quality of the steel strip can be ensured and the rolling efficiency can be improved.

Description

Technical Field

[0001] This invention relates to the technical field of steel strip rolling, and more specifically, to a steel strip rolling mill and a steel strip rolling method. Background Technology

[0002] In current steel strip rolling mills, strip shape is divided into strip surface shape and strip cross-sectional shape. The former is called straightness or waviness, and the latter is called strip crown or transverse thickness difference distribution. The straightness of the strip crown or transverse thickness difference distribution depends on the distribution shape of the mill roll gap during rolling, the straightness of the plate material before rolling, and the transverse thickness tolerance of the plate. The center crown and edge thinning in the same cross-section of the steel strip are caused by the deformation of various parts due to the rolling reaction force on the mill during rolling, resulting in uneven distribution of the roll gap. Therefore, to change the cross-sectional shape of the plate material being rolled, it is first necessary to improve the distribution shape of the work roll gap.

[0003] Therefore, most steel strip rolling mills currently use a single-sided drive system. The side where the drive unit is located along the center line of the rolling roll is typically called the drive side, and the side where the control panel is located is called the operating side or working side. However, because the rolling rolls are rotated by the drive unit, the reaction force from the steel strip during rolling can cause insufficient rolling pressure at the end of the working roll furthest from the drive side. This results in less thinning of the strip near the operating side, leading to a deviation in the transverse thickness of the strip and affecting its quality. Summary of the Invention

[0004] Therefore, in order to solve the problem that the reaction force of the steel strip during the rolling process of the aforementioned steel strip rolling mill leads to insufficient rolling pressure at the end of the work roll away from the drive side, resulting in deviations in the transverse thickness of the steel strip, this invention provides a steel strip rolling mill and a steel strip rolling method, the specific technical solution of which is as follows:

[0005] A steel strip rolling mill includes a frame with a pressure roll track, a work roll assembly disposed within the pressure roll track, and a pressure adjusting roll assembly disposed on the frame; the work roll assembly includes an upper work roll and a lower work roll that can rotate relative to the frame, and a roll pressing channel is formed between the upper work roll and the lower work roll; the pressure adjusting roll assembly includes a first pressure adjusting roll disposed above the upper work roll, the first pressure adjusting roll having a first roll surface at one end near the operating side, the first roll surface being tangential to the work roll surface of the upper work roll.

[0006] The aforementioned steel strip rolling mill, by setting up a pressure adjusting roll assembly, allows the first pressure adjusting roll to press against the upper work roll at the first roll surface near the operating side. This enables the rolling pressure at the upper work roll away from the drive side to overcome the reaction force generated during the rolling of the steel strip. Consequently, the roll pressure channel of the work roll assembly remains stable during the rolling of the steel strip, thus avoiding deviations in the transverse thickness of the steel strip, ensuring the quality of the steel strip, and improving rolling efficiency.

[0007] Furthermore, the first roller surface of the first pressure regulating roller includes a first contact surface and a second contact surface arranged sequentially from the operating side to the driving side, wherein the roughness of the first contact surface is greater than the roughness of the second contact surface.

[0008] Furthermore, the first pressure regulating roller includes a first roller body and a roller cylinder connected to the hub of the first roller body, the first contact surface is disposed on the roller cylinder, and the second contact surface is disposed on the first roller body.

[0009] Furthermore, the pressure adjusting roller assembly includes an axial adjustment group and adjustment seats disposed on both sides of the first pressure adjusting roller. The axial adjustment group includes a support and a worm gear and a worm shaft disposed on the support. The worm shaft is provided with a gear end, and the adjustment seat is provided with a toothed portion adapted to the toothed end. The worm gear drives the worm shaft to rotate, thereby driving the adjustment seat to move axially.

[0010] Furthermore, the work roll assembly includes an upper bearing seat assembly slidably connected to the frame and a synchronous drive assembly connected to the upper bearing seat assembly; the upper bearing seat assembly is disposed on both sides of the upper work roll; the synchronous drive assembly includes two hinge seats arranged at intervals and a synchronous shaft passing through the hinge seats, the two hinge seats being connected to the upper bearing seat assembly.

[0011] Furthermore, the synchronous drive assembly also includes a horizontal detection group, which is disposed on the synchronous shaft.

[0012] Furthermore, the strip mill also includes a hydraulic fine-tuning assembly and a work roll balancing assembly. The work roll assembly includes upper bearing housings disposed on both sides of the upper work roll and lower bearing housings disposed on both sides of the lower work roll. The hydraulic fine-tuning assembly is installed at the bottom of the frame and its top is connected to the lower bearing housings on both sides of the lower work roll. The work roll balancing assembly is installed between the upper and lower bearing housings to maintain the relative balance between the upper and lower work rolls.

[0013] Furthermore, the work roll balancing assembly includes a central spring, a guide sleeve, a helical spring, an upper pressure sleeve, and a lower pressure sleeve. The guide sleeve has a central hole and a helical track on its outer wall. The central spring is installed in the central hole, and the helical spring is disposed within the helical track. The upper pressure sleeve and the lower pressure sleeve are respectively fitted onto the upper and lower ends of the guide sleeve. The bottom of the upper bearing seat assembly and the top of the lower bearing seat assembly are provided with guide holes adapted to the guide sleeve, and the guide holes are provided with circular protrusions for pressing against the central spring.

[0014] Furthermore, the steel strip rolling mill includes a drive device, which includes a drive assembly and a connecting assembly; the drive assembly is provided with a first drive shaft and a second drive shaft; the connecting assembly includes a first connector and a second connector; the work roll assembly is provided with a work drive end, and the pressure adjusting roll assembly is provided with a pressure adjusting drive end; the first drive shaft is connected to the work drive end through the first connector and drives the work roll assembly to rotate; the second drive shaft is connected to the pressure adjusting drive end through the second connector and drives the pressure adjusting roll assembly to rotate.

[0015] On the other hand, a method for rolling steel strip includes the following steps:

[0016] The steel strip is subjected to sample rolling;

[0017] Analyze the thickness deviation of the steel strip at the same cross section;

[0018] Adjust the first pressure roller and press it against the upper work roller to make the rolling pressure on the steel strip uniform.

[0019] The steel strip is rolled. Attached Figure Description

[0020] The invention will be further understood from the following description taken in conjunction with the accompanying drawings. The components in the drawings are not necessarily drawn to scale, but rather the emphasis is on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0021] Figure 1 This is a schematic diagram of the structure of a steel strip rolling mill according to an embodiment of the present invention. Figure 1 ;

[0022] Figure 2 This is a cross-sectional view of the steel strip rolling mill according to an embodiment of the present invention. Figure 1 ;

[0023] Figure 3 This is a cross-sectional view of the steel strip rolling mill according to an embodiment of the present invention. Figure 2 ;

[0024] Figure 4 This is a schematic diagram of the structure of a steel strip rolling mill according to an embodiment of the present invention. Figure 2 ;

[0025] Figure 5 This is a structural cross-sectional view of the work roll assembly and the pressure regulating roll assembly according to an embodiment of the present invention;

[0026] Figure 6 This is a structural cross-sectional view of the work roll balancing assembly according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the synchronous drive assembly in a rolling mill according to an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the axial adjustment group in a rolling mill according to an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1-Frame, 2-Work roll assembly, 3-Pressure adjusting roll assembly, 4-Hydraulic fine-tuning assembly;

[0031] 5-Work roll balancing assembly; 6-Drive device;

[0032] 21-Upper working roll, 22-Lower working roll, 23-Upper bearing housing assembly, 24-Synchronous drive assembly;

[0033] 25 - Lower bearing housing assembly;

[0034] 235 - Guide hole;

[0035] 241-Hinged joint, 242-Synchronous shaft, 243-Horizontal detection group;

[0036] 31-First pressure adjusting roller, 32-Axial adjustment group, 33-Adjusting seat;

[0037] 301 - First roller surface;

[0038] 3011 - First contact surface, 3012 - Second contact surface;

[0039] 311 - First roller body, 312 - Roller;

[0040] 321-Support, 322-Worm gear, 323-Worm;

[0041] 41 - Output component; 42 - Driver component;

[0042] 51-Center spring, 52-Guide sleeve, 53-Helical spring, 54-Upper pressure sleeve, 55-Lower pressure sleeve;

[0043] 521 - Center hole, 522 - Spiral track;

[0044] 61-Driver component; 62-Connection component;

[0045] 611 - First drive shaft, 612 - Second drive shaft;

[0046] 621 - First connector, 622 - Second connector. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to its embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of protection of the invention.

[0048] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0050] In this invention, "first" and "second" do not represent a specific quantity or order, but are merely used to distinguish names.

[0051] like Figure 1 and Figure 2 , Figure 3 , Figure 5 As shown, a steel strip rolling mill according to one embodiment of the present invention includes a frame 1 with a pressure roll track, a work roll assembly 2 disposed within the pressure roll track, and a pressure adjusting roll assembly 3 disposed on the frame 1; the work roll assembly 2 includes an upper work roll 21 and a lower work roll 22 that can rotate relative to the frame 1, and a roll pressing channel is formed between the upper work roll 21 and the lower work roll 22; the pressure adjusting roll assembly 3 includes a first pressure adjusting roll 31 disposed above the upper work roll 21, the first pressure adjusting roll 31 having a first roll surface 301 at one end near the operating side, the first roll surface 301 being tangentially disposed to the work roll surface of the upper work roll 21.

[0052] The aforementioned steel strip rolling mill, by setting up a pressure adjusting roller assembly 3, allows the first pressure adjusting roller 31 to press against the upper work roll 21 near the first roller surface 301 at the operating side end. This enables the rolling pressure at the end of the upper work roll 21 away from the drive side to overcome the reaction force generated during the rolling of the steel strip. Consequently, the roller pressure channel of the work roll assembly 2 remains stable during the rolling of the steel strip, thereby avoiding deviations in the transverse thickness of the steel strip, ensuring the quality of the steel strip, and improving rolling efficiency.

[0053] In one embodiment, the first roll surface 301 of the first pressure adjusting roll 31 includes a first contact surface 3011 and a second contact surface 3012 arranged sequentially from the operating side to the driving side. The roughness of the first contact surface 3011 is greater than that of the second contact surface 3012. Thus, by setting the first contact surface 3011 with a larger roughness, the frictional force between the upper work roll 21 and the first pressure adjusting roll 31 is increased. This allows the rolling pressure at the end of the upper work roll 21 away from the driving side to overcome the reaction force generated during the rolling of the steel strip, avoiding deviations in the transverse thickness of the steel strip, thereby ensuring the quality of the steel strip and improving rolling efficiency.

[0054] like Figure 5 As shown, in one embodiment, the first pressure adjusting roller 31 includes a first roller body 311 and a roller 312 connected to the hub of the first roller body 311. A first contact surface 3011 is disposed on the roller 312, and a second contact surface 3012 is disposed on the first roller body 311. Specifically, the hub connection is one or more of a keyed connection, splined connection, pin connection, or interference fit connection. Thus, by disposing of the first contact surface 3011 and the second contact surface 3012 on different components, the processing of the first pressure adjusting roller 31 is facilitated, and production costs are reduced.

[0055] In one embodiment, the first contact surface 3011 is provided with contact teeth, which are a plurality of protrusions distributed in a toothed pattern along the circumference of the roller 312. Specifically, the upper working roller 21 is provided with a sleeve that is adapted to the contact teeth and is detachable. In this way, by cooperating with the sleeve, the first pressure regulating roller 31 and the upper working roller 21 can maintain a stable relative movement.

[0056] In one embodiment, the first pressure adjusting roll 31 and the upper work roll 21 have the same roll surface diameter. This ensures that the first pressure adjusting roll 31 and the upper work roll 21 maintain stable relative motion, allowing the rolling pressure at the end of the upper work roll 21 away from the drive side to overcome the reaction force generated during the rolling of the steel strip, avoiding deviations in the transverse thickness of the steel strip, thereby ensuring the quality of the steel strip and improving rolling efficiency.

[0057] like Figure 3As shown, in one embodiment, a first pressure adjusting roller 31 and an intermediate roller are simultaneously arranged above the upper work roll 21. In this way, the intermediate roller provides the necessary rolling pressure to the upper work roll 21, and the first pressure adjusting roller 31 adjusts the rolling pressure distribution on the upper work roll 21.

[0058] like Figure 8 As shown, in one embodiment, the pressure adjusting roll assembly 3 includes an axial adjustment group 32 and adjustment seats 33 disposed on both sides of the first pressure adjusting roll 31. The axial adjustment group 32 includes a support 321 and a worm gear 322 and a worm 323 disposed on the support 321. The worm 323 has a gear end, and the adjustment seat 33 has a toothed portion adapted to the toothed end. The worm gear 322 drives the worm 323 to rotate, thereby driving the adjustment seat 33 to move axially. Thus, because the rolling conditions are different, the position of the reaction force generated during the rolling of the steel strip is also different. By driving the adjustment seat 33 to move axially through the axial adjustment group 32, the force position of the first roll surface 301 pressing against the upper work roll 21 is adjusted, thereby avoiding deviations in the transverse thickness of the steel strip, thus ensuring the quality of the steel strip and improving rolling efficiency.

[0059] In one embodiment, the worm gear component 323 includes a worm, a worm support sleeve, a worm locking screw, and a worm locking nut. The worm support sleeve is mounted on a support 321, and the position of the adjusting screw on the support 321 is adjusted using the worm locking screw and worm locking nut. The adjusting seat 33 is a bearing seat with a helical gear on its outer ring. Both ends of the worm can be rotated, thereby driving the bearing seat with the helical gear on its outer ring to rotate, thus achieving axial movement of the bearing seat with the helical gear on its outer ring. In this way, the adjustment of the transmission between the worm gear component 322 and the worm gear component 323 is achieved through the worm locking screw and worm locking nut.

[0060] like Figure 7 As shown, in one embodiment, the work roll assembly 2 includes an upper bearing seat assembly 23 slidably connected to the frame 1 and a synchronous drive assembly 24 connected to the upper bearing seat assembly 23; the upper bearing seat assembly 23 is disposed on both sides of the upper work roll 21; the synchronous drive assembly 24 includes two hinge seats 241 arranged at intervals and a synchronous shaft 242 passing through the hinge seats 241, and the two hinge seats 241 are connected to the upper bearing seat assembly 23. Thus, by setting the synchronous shaft 242, the synchronization rate on both sides of the upper work roll 21 can be effectively guaranteed, ensuring the uniform thickness of the rolled steel strip, thereby guaranteeing the quality of the steel strip and improving rolling efficiency.

[0061] In one embodiment, the synchronous drive assembly 24 further includes a level detection group 243 disposed on the synchronous shaft 242. Thus, by detecting the levelness of the synchronous shaft 242 through the level detection group 243, the levelness of the upper work roll 21 is monitored, ensuring that both sides of the upper work roll 21 remain on the same rolling level plane, ensuring consistent thickness of the rolled steel strip, thereby guaranteeing steel strip quality and improving rolling efficiency.

[0062] In one embodiment, the level detection group 243 includes two spaced-apart mounting plates, each equipped with a level gauge. The upper interfaces of both level gauges are open to the outside atmosphere, and their lower interfaces are interconnected via pipes. The two level gauges and the pipes together form a communicating vessel for holding and measuring liquid. The two mounting plates are respectively connected to both ends of the synchronous shaft 242 to detect the levelness of the synchronous shaft 242 by measuring the level values ​​of the two level gauges during its ascent or descent. This method of detecting the levelness of the synchronous shaft 242 using level gauges is simple in structure and easy to maintain; the detection accuracy and level of automation can be improved by adding photoelectric sensors.

[0063] like Figure 2 As shown, in one embodiment, the strip mill further includes a hydraulic fine-tuning assembly 4 and a work roll balancing assembly 5. The work roll assembly 2 includes upper bearing seat groups 23 disposed on both sides of the upper work roll 21 and lower bearing seat groups 25 disposed on both sides of the lower work roll 22. The hydraulic fine-tuning assembly 4 is installed at the bottom of the frame 1, and the output component 41 of the hydraulic fine-tuning assembly 4 is connected to the lower bearing seat groups 25 on both sides of the lower work roll 22. The work roll balancing assembly 5 is installed between the upper bearing seat groups 23 and the lower bearing seat groups 25 to maintain the relative balance between the upper work roll 21 and the lower work roll 22. Thus, by adjusting the levelness of the lower work roll 22 through the hydraulic fine-tuning assembly 4, the supporting force provided by the lower work roll 22 during rolling is ensured to remain in a horizontal state. In addition, by keeping both sides of the upper work roll 21 balanced through the work roll balancing assembly 5, the thickness of the rolled steel strip is ensured to be consistent, thereby ensuring the quality of the steel strip and improving rolling efficiency.

[0064] In one embodiment, the hydraulic fine-tuning assembly 4 includes a drive member 42 and an output member 41. Specifically, the drive member 42 is a hydraulic cylinder, and the output member 41 is a wedge assembly. Thus, by extending or retracting the cylinder rod of the hydraulic cylinder, the upper end face of the wedge assembly is pushed up or down, thereby adjusting the horizontal height of the lower bearing seat assembly 25.

[0065] like Figure 6As shown, in one embodiment, the work roller balancing assembly 5 includes a central spring 51, a guide sleeve 52, a helical spring 53, an upper pressure sleeve 54, and a lower pressure sleeve 55. The guide sleeve 52 has a central hole 521 and a helical track 522 on its outer wall. The central spring 51 is installed in the central hole 521, and the helical spring 53 is installed in the helical track 522. The upper pressure sleeve 54 and the lower pressure sleeve 55 are respectively fitted on the upper and lower ends of the guide sleeve 52. The bottom of the upper bearing seat assembly 23 and the top of the lower bearing seat assembly 25 are provided with guide holes 235 adapted to the guide sleeve 52. The guide holes 235 are provided with round protrusions for pressing the central spring 51. Thus, the guide sleeve 52 and the guide hole 235 guide each other, preventing the center spring 51 and the helical spring 53 from disengaging. At the same time, the double buffering effect of the center spring 51 and the helical spring 53 keeps the two sides of the upper work roll 21 balanced, ensuring that the thickness of the rolled steel strip is consistent, thereby ensuring the quality of the steel strip and improving the rolling efficiency.

[0066] like Figure 4 As shown, in one embodiment, the strip mill includes a drive device 6, which includes a drive assembly 61 and a connecting assembly 62. The drive assembly 61 is provided with a first drive shaft 611 and a second drive shaft 612. The connecting assembly 62 includes a first connector 621 and a second connector 622. The work roll assembly 2 is provided with a work drive end, and the pressure regulating roll assembly 3 is provided with a pressure regulating drive end. The first drive shaft 611 is connected to the work drive end through the first connector 621 and drives the work roll assembly 2 to rotate. The second drive shaft 612 is connected to the pressure regulating drive end through the second connector 622 and drives the pressure regulating roll assembly 3 to rotate.

[0067] In one embodiment, the first connecting member 621 and the second connecting member 622 are spherical gear couplings. Specifically, the spherical gear coupling includes joint ends, a connecting plate, and a pair of spherical gears; the pair of spherical gears includes a concave spherical gear and a convex spherical gear that mesh with each other. Both the concave and convex spherical gears include a spherical crown, on the circumference of which involute gear teeth are evenly distributed. A mounting shaft is provided at the bottom of the spherical crown. A cross-shaped groove is provided at the top of the spherical crown of the concave spherical gear, and a cross-shaped protrusion is provided at the top of the spherical crown of the convex spherical gear. The cross-shaped protrusion matches the cross-shaped groove. There are two joint ends, and the mounting shafts of the concave and convex spherical gears are rotatably disposed inside the two joint ends respectively. Pivots are provided at both ends of the connecting plate, and the two joint ends are rotatably connected to the corresponding pivots respectively. In this way, the cross-shaped protrusion and the cross-shaped groove can withstand greater torque during the centering transmission process, ensuring smooth transmission under high load conditions.

[0068] On the other hand, a steel strip rolling method according to one embodiment of the present invention includes the following steps:

[0069] S1. Perform sample rolling on the steel strip;

[0070] S2. Analyze the thickness deviation of the steel strip at the same cross section;

[0071] S3. Adjust the first pressure roller and press it against the upper work roller to make the rolling pressure on the steel strip uniform.

[0072] S4. Perform steel strip rolling.

[0073] The above-mentioned steel strip rolling method uses a first pressure adjusting roller assembly to press the upper work roll against the first roller surface near the operating side. This allows the rolling pressure at the end of the upper work roll away from the drive side to overcome the reaction force generated during the steel strip rolling process. As a result, the roll pressure channel of the work roll assembly remains stable during the steel strip rolling process, thereby avoiding deviations in the transverse thickness of the steel strip, ensuring the quality of the steel strip, and improving rolling efficiency.

[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A steel strip rolling mill characterized in that, It includes a frame with a pressure roller track, a work roller assembly set in the pressure roller track, and an adjusting roller assembly set on the frame; The work roll assembly includes an upper work roll and a lower work roll that are rotatable relative to the frame, and a roll pressing channel is formed between the upper work roll and the lower work roll; The pressure adjusting roller assembly includes a first pressure adjusting roller disposed above the upper working roller. The first pressure adjusting roller has a first roller surface at one end near the operating side, and the first roller surface is tangential to the working roller surface of the upper working roller. The first roller surface of the first pressure regulating roller includes a first contact surface and a second contact surface arranged sequentially from the operating side to the driving side, and the roughness of the first contact surface is greater than the roughness of the second contact surface. The first pressure regulating roller includes a first roller body and a roller cylinder connected to the hub of the first roller body. The first contact surface is disposed on the roller cylinder, and the second contact surface is disposed on the first roller body. The pressure adjusting roller assembly includes an axial adjustment group and adjustment seats disposed on both sides of the first pressure adjusting roller. The axial adjustment group includes a support and a worm gear and a worm shaft disposed on the support. The worm shaft is provided with a gear end, and the adjustment seat is provided with a toothed portion adapted to the toothed end. The worm gear drives the worm shaft to rotate, thereby driving the adjustment seat to move axially.

2. A strip rolling mill as claimed in claim 1, characterised in that, The work roll assembly includes an upper bearing housing group slidably connected to the frame and a synchronous drive assembly connected to the upper bearing housing group; The upper bearing housing assembly is disposed on both sides of the upper working roller; The synchronous drive assembly includes two hinge seats spaced apart and a synchronous shaft passing through the hinge seats. The two hinge seats are connected to the upper bearing seat assembly.

3. A steel strip rolling mill according to claim 2, characterized in that, The synchronous drive assembly also includes a horizontal detection group, which is disposed on the synchronous shaft.

4. A steel strip rolling mill according to claim 1, characterized in that, The steel strip mill also includes a hydraulic fine-tuning assembly and a work roll balancing assembly. The working roll assembly includes an upper bearing seat assembly disposed on both sides of the upper working roll and a lower bearing seat assembly disposed on both sides of the lower working roll. The hydraulic fine-tuning assembly is installed at the bottom of the frame and the top of the hydraulic fine-tuning assembly is connected to the lower bearing seat assembly on both sides of the lower work roller. The work roll balancing assembly is installed between the upper bearing housing and the lower bearing housing to maintain the relative balance between the upper and lower work rolls.

5. A steel strip rolling mill according to claim 4, characterized in that, The work roll balancing assembly includes a central spring, a guide sleeve, a helical spring, an upper pressure sleeve, and a lower pressure sleeve. The guide sleeve has a central hole and a helical track on its outer wall. The central spring is installed in the central hole, and the helical spring is disposed within the helical track. The upper pressure sleeve and the lower pressure sleeve are respectively fitted onto the upper and lower ends of the guide sleeve; The bottom of the upper bearing housing assembly and the top of the lower bearing housing assembly are provided with guide holes adapted to the guide sleeve, and the guide holes are provided with round protrusions for pressing the central spring.

6. A steel strip rolling mill according to claim 1, characterized in that, The steel strip rolling mill includes a drive device, which includes a drive assembly and a connecting assembly; The drive assembly includes a first drive shaft and a second drive shaft; the connection assembly includes a first connector and a second connector. The working roller assembly is provided with a working drive end, and the pressure regulating roller assembly is provided with a pressure regulating drive end; The first drive shaft is connected to the working drive end via a first connector and drives the working roller assembly to rotate; The second drive shaft is connected to the pressure regulating drive end via a second connector and drives the pressure regulating roller assembly to rotate.

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