An outlet section of a continuous rolling mill

Abstract

The application provides a continuous rolling mill exit section device, and relates to the technical field of steel rolling equipment.The continuous rolling mill exit section device comprises an exit pinch roll device and a pre-cutting pinch roll device arranged in sequence along the strip conveying direction.The exit pinch roll device comprises a pinch roll group, a driving assembly and a lifting and pressing assembly.The pinch roll group comprises an upper pinch roll and a lower pinch roll.The pre-cutting pinch roll device comprises a frame, a pre-cutting pinch roll group and an elastic buffer.The pre-cutting pinch roll group comprises a pre-cutting upper pinch roll and a pre-cutting lower pinch roll.The frame is arranged on both sides of the pre-cutting upper pinch roll and the pre-cutting lower pinch roll.The bearing seat of the pre-cutting upper pinch roll is fixedly arranged in the frame.The bearing seat of the pre-cutting lower pinch roll is slidingly arranged in the frame.The elastic buffer is arranged between the bearing seat of the pre-cutting upper pinch roll and the bearing seat of the pre-cutting lower pinch roll.The continuous rolling mill exit section device solves the problem of speed difference between the pinch roll and the strip when the speed of the strip changes, reduces the surface scratches and improves the stability of the tension control.

Description

Technical Field

[0001] This invention relates to the field of steel rolling equipment technology, and more specifically, to an outlet section device for a continuous rolling mill. Background Technology

[0002] As the core equipment of modern metal processing production lines, continuous rolling mills play a crucial role in the steel and non-ferrous metals industries, efficiently rolling metal billets into finished products of predetermined specifications through continuous, coordinated operation of multiple stands. Maintaining stable strip tension and ensuring continuous conveying in the exit section of the continuous rolling mill—the area between the last stand and the flying shear—is a critical aspect of ensuring product quality. Current technologies commonly employ a single passive pressure roll for tension control. This roll lacks active driving capability, relying solely on the strip for rotation, resulting in an inability to form an effective wrap angle between the roll and the strip. During strip speed changes, such as acceleration or deceleration, a speed difference easily arises between the roll and the strip, leading to relative slippage. This relative slippage not only causes surface scratches on the strip, significantly increasing the scrap rate, but also becomes more pronounced in the production of ultra-thin strips due to the lower overall tension level, making it difficult to meet the demands of high-precision production. In addition, most existing pre-shear clamping devices adopt a swing-type structure design, whose mechanical structure limits the output capacity of clamping force and cannot adapt to dynamic tension fluctuations during the production process. This further aggravates the instability of tension control and affects the continuity and surface quality of strip steel conveying. Summary of the Invention

[0003] The purpose of this invention is to provide a continuous rolling mill exit section device that solves the problem of speed difference between the pressure roller and the strip when the strip speed changes, reduces surface scratches, and improves tension control stability.

[0004] This invention provides equipment for the exit section of a continuous rolling mill, including an exit pinching device and a pre-shear pinching device arranged sequentially along the strip conveying direction; the exit pinching device includes a pinching roll group, an active drive assembly, and a lifting and pressing assembly; the pinching roll group includes an upper pinching roll and a lower pinching roll; the active drive assembly is drivenly connected to the upper and lower pinching rolls to actively drive them to rotate; the lifting and pressing assembly is connected to the lower pinching roll to drive it closer to or further away from the lower pinching roll. The pre-shearing clamping device includes a frame, a pre-shearing roller assembly, and an elastic buffer. The pre-shearing roller assembly includes an upper pre-shearing roller and a lower pre-shearing roller. Both ends of the upper and lower pre-shearing rollers are provided with bearing seats. The frame is located on both sides of the upper and lower pre-shearing rollers. The bearing seat of the upper pre-shearing roller is fixedly located within the frame, and the bearing seat of the lower pre-shearing roller is slidably located within the frame. The elastic buffer is located between the bearing seats of the upper and lower pre-shearing rollers.

[0005] Optionally, the active drive assembly includes an upper roller motor, a lower roller motor, an upper roller connecting shaft, and a lower roller connecting shaft. The upper roller motor is connected to the clamping upper roller via the upper roller connecting shaft, and the lower roller motor is connected to the clamping lower roller via the lower roller connecting shaft. Both the upper roller connecting shaft and the lower roller connecting shaft are covered with protective covers.

[0006] Optionally, the upper roll motor and the lower roll motor are each equipped with an encoder, and the continuous rolling mill exit section equipment also includes a control module. The control module is connected to the encoder, the upper roll motor and the lower roll motor respectively to adjust the linear speed of the pinch roll and the pinch roll according to the strip speed.

[0007] Optionally, the lifting and clamping assembly includes a hydraulic cylinder and a proportional valve. The output end of the hydraulic cylinder is connected to the clamping lower roller, and the proportional valve is located in the hydraulic line of the hydraulic cylinder to adjust the output pressure of the hydraulic cylinder.

[0008] Optionally, both the upper pinch roll and the lower pinch roll are steel rolls, and the roll surfaces of the upper pinch roll and the lower pinch roll have a set roll shape that matches the width direction of the strip.

[0009] Optionally, the outlet clamping device further includes a safety pin located below the clamping lower roller to secure the clamping lower roller during maintenance.

[0010] Optionally, the pre-shear clamping device further includes a pre-shear hydraulic cylinder, which is located within the frame and connected to the bearing seat of the pre-shear lower roller to drive the pre-shear lower roller to rise and fall.

[0011] Optionally, a thickness gauge and a strip roll are sequentially provided between the outlet clamping device and the pre-shear clamping device along the strip conveying direction.

[0012] Optionally, the equipment at the exit section of this continuous rolling mill may also include a flying shear, an exit guide roller, and a coiler, which are arranged sequentially downstream of the pre-shear clamping device along the strip conveying direction.

[0013] Optionally, the elastic buffer is a disc spring.

[0014] The present invention provides an outlet section device for a continuous rolling mill, which, compared with the prior art, has, but is not limited to, the following beneficial effects: The continuous rolling mill exit section equipment described in this invention, through the installation of an actively driven exit clamping device, can apply stable active tension to the strip. During strip slitting, the position where the pre-tension is applied to the mill is closer to the mill work rolls, resulting in a more significant effect on strip stability and thus improving indicators such as product thickness variation. Simultaneously, it effectively avoids the surface scratches and high scrap rate caused by the relative sliding between the traditional passive pressure rolls and the strip. Furthermore, the elastic buffer design of the pre-shear clamping device enhances the stable clamping of the strip and reduces pre-shear vibration, thereby improving the conveying accuracy and shearing quality of ultra-thin strip and meeting the demands of high-precision production. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the outlet section equipment of the continuous rolling mill according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the pre-shear clamping device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the pre-shear roller assembly according to an embodiment of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1. Pinch roll assembly; 11. Upper pinch roll; 12. Lower pinch roll; 2. Active drive assembly; 21. Upper roll motor; 22. Upper roll motor; 23. Upper roll connecting shaft; 24. Lower roll connecting shaft; 3. Frame; 4. Pre-shear roll assembly; 41. Upper pre-shear roll; 42. Lower pre-shear roll; 5. Protective cover; 6. Elastic buffer; 7. Hydraulic cylinder; 8. Thickness gauge; 9. Plate roll; 100. Flying shear; 200. Exit guide roll; 300. Coiler; 400. Mill end stand. Detailed Implementation

[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0018] In the description of this invention, the orientations or positional relationships indicated by terms such as "up," "down," "left," "right," "top," "bottom," "front," "back," "inner," and "outer" are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this invention. They are not intended to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this invention.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] In the description of this specification, references to terms such as "embodiment," "one embodiment," and "one implementation" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or implementation of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.

[0021] Furthermore, in the attached diagram, the X-axis represents the horizontal direction, that is, the left and right position, and the positive direction of the X-axis represents the left, and the negative direction of the X-axis represents the right; in the attached diagram, the Z-axis represents the vertical direction, that is, the up and down position, and the positive direction of the Z-axis represents the up, and the negative direction of the Z-axis represents the down.

[0022] It should also be noted that the aforementioned X-axis and Z-axis representations are only for the purpose of facilitating the description of the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0023] like Figures 1 to 3As shown in the figure, the continuous rolling mill exit section equipment of this invention includes: an exit pinching device and a pre-shear pinching device arranged sequentially along the strip conveying direction; the exit pinching device includes a pinching roller group 1, an active drive assembly 2, and a lifting and pressing assembly; the pinching roller group 1 includes an upper pinching roller 11 and a lower pinching roller 12; the active drive assembly 2 is tractively connected to the upper pinching roller 11 and the lower pinching roller 12 to actively drive the upper pinching roller 11 and the lower pinching roller 12 to rotate; the lifting and pressing assembly is connected to the lower pinching roller 12 to drive the lower pinching roller 12 to move closer to or away from the strip. The clamping upper roller 11 is described above; the pre-shear clamping device includes a frame 3, a pre-shear roller group 4, and an elastic buffer 6. The pre-shear roller group 4 includes a pre-shear upper roller 41 and a pre-shear lower roller 42. Both ends of the pre-shear upper roller 41 and the pre-shear lower roller 42 are provided with bearing seats. The frame 3 is located on both sides of the pre-shear upper roller 41 and the pre-shear lower roller 42. The bearing seat of the pre-shear upper roller 41 is fixedly located in the frame 3, and the bearing seat of the pre-shear lower roller 42 is slidably located in the frame 3. The elastic buffer 6 is located between the bearing seats of the pre-shear upper roller 41 and the bearing seats of the pre-shear lower roller 42.

[0024] In this embodiment, in conjunction with the appendix Figure 1 Appendix Figure 2 and attached Figure 3 As shown, the exit pinching device is configured to clamp and actively drive the strip in the strip conveying direction to provide stable tension and control the strip conveying speed. The pinch roll group 1 is the core component of the exit pinching device, consisting of an upper pinch roll 11 and a lower pinch roll 12. It applies pressure to the strip and actively rotates to achieve effective clamping and conveying of the strip. The active drive assembly 2 provides power to the pinch roll group 1, enabling it to rotate actively, thereby overcoming the friction between the strip and the roll surface and achieving precise speed control and tension maintenance of the strip. The lifting and clamping assembly is configured to adjust the distance between the lower pinch roll 12 and the upper pinch roll 11, thereby controlling the clamping force on the strip to adapt to the rolling requirements of strips of different thicknesses. The pre-shear pinching device is located downstream of the exit pinching device to further clamp and stabilize the strip before it enters the flying shear 100, ensuring the accuracy of the shearing process. The frame 3 provides structural support for the pre-shear pinching device and carries the bearing housing of the pre-shear roll group 4, ensuring the stable operation of the roll group. The pre-shear roll group 4 consists of an upper pre-shear roll 41 and a lower pre-shear roll 42. Its function is to assist in clamping the strip steel before shearing, so as to reduce the vibration and displacement of the strip steel. The elastic buffer 6 is set between the bearing seats of the pre-shear roll group 4 to absorb the impact and vibration that may be generated during the shearing process, thereby protecting the equipment and improving the shearing quality.

[0025] In this embodiment, the exit section equipment of the continuous rolling mill is configured with an exit pinch device and a pre-shear pinch device sequentially arranged along the strip conveying direction. The exit pinch device is located after the strip leaves the last stand 400 of the mill and is used for preliminary tension control and speed adjustment of the strip. The pre-shear pinch device is located downstream of the exit pinch device and is used to further stabilize the strip before shearing. It should be noted that the last stand 400 of the mill refers to the last mill. A continuous rolling mill may have 5 or 6 mills, and the last stand 400 is the last mill.

[0026] The outlet clamping device includes a clamping roller assembly 1, an active drive assembly 2, and a lifting and pressing assembly. The clamping roller assembly 1 is configured to directly contact the strip and apply clamping force. The active drive assembly 2 provides power to the clamping roller assembly 1, enabling it to rotate actively. The lifting and pressing assembly adjusts the clamping force of the clamping roller assembly 1. The clamping roller assembly 1 consists of an upper clamping roller 11 and a lower clamping roller 12. The upper clamping roller 11 and the lower clamping roller 12 are configured to be opposite each other, forming a clamping channel through which the strip is clamped. The active drive assembly 2 is configured to be driveably connected to the upper clamping roller 11 and the lower clamping roller 12 to actively drive their rotation. For example, power can be provided by one or more motors, transmitting torque to the upper clamping roller 11 and the lower clamping roller 12 via a transmission mechanism such as gears, chains, or belts, thereby achieving synchronous or independent rotation of the rollers. The lifting and clamping assembly is configured to connect to the lower clamping roller 12 to drive the lower clamping roller 12 closer to or further away from the upper clamping roller 11. Specifically, the lifting and lowering of the lower clamping roller 12 can be achieved by a mechanical screw mechanism, a hydraulic cylinder, or a simple lever mechanism, thereby adjusting the clamping force on the strip.

[0027] The pre-shear clamping device includes a frame 3, a pre-shear roller assembly 4, and an elastic buffer 6. The frame 3 provides structural support for the entire pre-shear clamping device. The pre-shear roller assembly 4 is configured to assist in clamping the strip. The elastic buffer 6 absorbs impact. The pre-shear roller assembly 4 consists of an upper pre-shear roller 41 and a lower pre-shear roller 42. The upper pre-shear roller 41 and the lower pre-shear roller 42 are arranged vertically opposite each other, forming a channel for the strip to pass through. Bearing seats are provided at both ends of the upper pre-shear roller 41 and the lower pre-shear roller 42, which support the roller body and allow its rotation. The frame 3 is located on both sides of the upper pre-shear roller 41 and the lower pre-shear roller 42, providing mounting positions for the bearing seats. The bearing seat of the upper pre-shear roller 41 is fixedly installed within the frame 3 to ensure the stability of the upper pre-shear roller 41's position. The bearing seat of the lower pre-shear roller 42 is slidably installed within the frame 3, allowing the lower pre-shear roller 42 to rotate vertically (see attached diagram). Figure 1The shearing machine moves along the Z-axis. An elastic buffer 6 is positioned between the bearing housings of the upper shearing roller 41 and the lower shearing roller 42. For example, a buffer such as a disc spring, rubber pad, or air bladder can be used to provide cushioning during the shearing process and reduce vibration transmission.

[0028] An elastic buffer 6 is installed between the bearing seats of the upper pre-shear roll 41 and the lower pre-shear roll 42. Through pre-compression, a continuous and stable elastic clamping force is generated, ensuring reliable clamping of the strip. When the flying shear 100 performs instantaneous shearing, it generates impact loads and vibrations. The elastic buffer 6 absorbs the impact energy through elastic deformation, preventing rigid collisions from damaging the roll surface, bearings, shear blades, and frame. This suppresses strip vibration, reduces shearing errors of the flying shear 100, improves cross-sectional quality, compensates for strip thickness fluctuations, roll surface wear, and bearing clearance changes, and maintains effective roll gap and clamping force at all times, eliminating the need for frequent manual adjustments and reducing downtime for maintenance.

[0029] The continuous rolling mill exit section equipment of this invention, by setting up an actively driven exit clamping device, can apply stable active tension to the strip steel, effectively avoiding the problems of surface scratches and high scrap rates caused by the relative sliding between the traditional passive pressure rollers and the strip steel. Simultaneously, the elastic buffer design of the pre-shear clamping device enhances the stable clamping of the strip steel and reduces pre-shear vibration, thereby improving the conveying accuracy and shearing quality of ultra-thin strip steel and meeting the requirements of high-precision production.

[0030] Optionally, the active drive assembly 2 includes an upper roller motor 21, a lower roller motor 22, an upper roller connecting shaft 23, and a lower roller connecting shaft 24. The upper roller motor 21 is connected to the clamping upper roller 11 via the upper roller connecting shaft 23, and the lower roller motor 22 is connected to the clamping lower roller 12 via the lower roller connecting shaft 24. Both the upper roller connecting shaft 23 and the lower roller connecting shaft 24 are covered with protective covers 5.

[0031] In this embodiment, in conjunction with the appendix Figure 2As shown, the upper roller motor 21 and the lower roller motor 22 are independent power sources used to drive the pinch upper roller 11 and the pinch lower roller 12. This independent drive design allows for separate speed and torque control of the pinch upper roller 11 and the pinch lower roller 12 to adapt to different strip specifications and process requirements. For example, AC servo motors or DC motors can be used, and high-precision speed synchronization or differential operation can be achieved through a precise control system, thereby optimizing the strip conveying process. The upper roller connecting shaft 23 and the lower roller connecting shaft 24 are transmission components that connect the motors to the pinch rollers, responsible for transmitting the rotational power of the upper roller motor 21 and the lower roller motor 22 to the pinch upper roller 11 and the pinch lower roller 12. These connecting shafts are typically made of high-strength alloy steel and precision machined to ensure transmission accuracy and reliability under high-speed, heavy-load conditions, while also compensating for certain installation errors and vibrations. The protective cover 5 is installed outside the upper roller connecting shaft 23 and the lower roller connecting shaft 24, and its main function is to provide physical protection for these critical transmission components. In the harsh working environment of a continuous rolling mill, the protective cover 5 effectively blocks splashed coolant, iron oxide scale, dust, and other impurities from corroding and wearing the connecting shaft. It also prevents accidental contact with the high-speed rotating shaft, improving equipment stability and operational safety. The protective cover 5 can be made of sheet metal or high-strength engineering plastics and is designed for easy disassembly and maintenance.

[0032] Optionally, the upper roller motor 21 and the lower roller motor 22 are respectively equipped with encoders, and the continuous rolling mill exit section equipment also includes a control module. The control module is connected to the encoder, the upper roller motor 21 and the lower roller motor 22 respectively to adjust the linear speed of the pinching upper roller 11 and the pinching lower roller 12 according to the strip speed.

[0033] In this embodiment, an encoder is a device that converts mechanical motion (such as rotation) into electrical signals, enabling real-time and accurate detection of the rotational speed and / or position information of a shaft connected to a motor or roller. For example, an incremental rotary encoder can be used, which converts the shaft's rotational angle into a series of pulse signals using photoelectric or magnetoelectric principles. The frequency of these pulse signals is proportional to the shaft's rotational speed. By counting and processing these pulse signals, real-time rotational speed data of the upper and lower clamping rollers 11 and 12 can be obtained. The control module is an electronic unit integrating hardware and software, responsible for receiving and processing signals from the encoder and sending control commands to the motor according to preset control logic. The control module can be a programmable logic controller (PLC), a local unit of a distributed control system (DCS), or a dedicated motion controller. Internally, it typically includes a data acquisition unit, processor, memory, and communication interface, capable of executing complex control algorithms.

[0034] The control module is connected to the encoder, the upper roller motor 21, and the lower roller motor 22 respectively to adjust the linear speed of the pinch roller 11 and the pinch roller 12 according to the strip speed. This means that the control module receives the actual rotational speed feedback signal of the pinch roller from the encoder, and simultaneously obtains the current strip speed (which can be provided by upstream equipment or detected by other sensors). The control module compares the actual pinch roller linear speed (calculated from the roller diameter and rotational speed) with the target strip speed, and based on the deviation between the two, adjusts the output power or frequency of the upper roller motor 21 and the lower roller motor 22 in real time using PID (proportional-integral-derivative) or other advanced control algorithms, thereby precisely controlling the rotational speed of the pinch roller 11 and the pinch roller 12 to keep their linear speed consistent with the strip speed.

[0035] Optionally, the lifting and pressing assembly includes a hydraulic cylinder 7 and a proportional valve. The output end of the hydraulic cylinder 7 is connected to the clamping lower roller 12, and the proportional valve is located in the hydraulic line of the hydraulic cylinder 7 to adjust the output pressure of the hydraulic cylinder 7.

[0036] In this embodiment, in conjunction with the appendix Figure 2 As shown, the hydraulic cylinder 7 is an actuator that converts hydraulic energy into mechanical energy. It drives a piston rod to move under the pressure of hydraulic oil, thereby generating thrust or pull. In this embodiment, the output end of the hydraulic cylinder 7, i.e., the piston rod, is connected to the clamping lower roller 12. When the hydraulic cylinder 7 is working, the extension and retraction of its piston rod directly drives the clamping lower roller 12 to rise and fall, achieving the clamping or releasing of the strip. The hydraulic cylinder 7 typically has advantages such as compact structure, large output force, and fast response speed, providing a stable and reliable lifting driving force for the clamping lower roller 12. A proportional valve is a valve that can continuously and proportionally control the flow or pressure in a hydraulic system according to the magnitude of the input electrical signal. In this embodiment, the proportional valve is installed in the hydraulic pipeline of the hydraulic cylinder 7. By adjusting the electrical signal input to the proportional valve, the pressure of the hydraulic oil entering or exiting the hydraulic cylinder 7 can be precisely controlled, thereby achieving stepless adjustment of the output force of the hydraulic cylinder 7. For example, when increased clamping force is required, the control system sends a signal to the proportional valve to increase the pressure. The proportional valve then adjusts, increasing the pressure within the hydraulic cylinder 7, thereby increasing the clamping force of the lower clamping roller 12 on the strip. Conversely, the clamping force is reduced.

[0037] Thus, the upper pinch roller 11 is a fixed roller, and the lower pinch roller 12 is an oscillating roller, driven by the hydraulic cylinder 7. The hydraulic cylinder 7 is equipped with a proportional valve, which can adjust the clamping force online. The clamping force can be adjusted according to the strip thickness and speed. Since the linear speed of the roller can be consistent with the strip speed, the lower pinch roller 12 can be opened and clamped at any time. There are three usage methods: First, clamping is only used before strip cutting. After the flying shear 100 cuts the strip, clamping provides pre-tension. When the strip enters the coiler 300 and is wound 2 to 3 times on the drum, the coiler 300 can establish tension with the rolling mill, and then the pinch roll group 1 is opened. This mode is used to produce strip with a thickness of less than or equal to 0.2 mm. Second, the pinch lower roll 12 is always open, and only the pinch upper roll 11 is used as a pressure roll. This mode is used to produce strip with a thickness greater than 0.2 mm. Third, the pinch lower roll 12 is always clamped. In this case, the pinch roll group 1 acts as a squeeze roll. This mode is used when there is a lot of residual emulsion on the surface of the strip at the rolling mill exit, which cannot be removed by the subsequent blowing system. The pinch roll group 1 is used to squeeze out the residual emulsion on the surface of the strip.

[0038] Optionally, both the upper pinch roll 11 and the lower pinch roll 12 are steel rolls, and the roll surfaces of the upper pinch roll 11 and the lower pinch roll 12 have a set roll shape that matches the width direction of the strip.

[0039] In this embodiment, in conjunction with the appendix Figure 2 As shown, both the upper pinch roll 11 and the lower pinch roll 12 are made of steel, designed to provide sufficient strength, hardness, and wear resistance to withstand the high-speed passage and pinching pressure of the strip during continuous rolling. Steel rolls typically have a high modulus of elasticity, ensuring that the roll body shrinks during pinching, thereby maintaining a stable pinch gap and pinching force. Furthermore, the surface properties of the steel rolls can be further optimized through finishing, heat treatment, or coating, for example, by improving the coefficient of friction or corrosion resistance, to adapt to different strip materials and process requirements. Simultaneously, the roll surfaces of the upper pinch roll 11 and the lower pinch roll 12 have a pre-designed roll shape that matches the width direction of the strip. This pre-designed roll shape refers to the specific geometry pre-designed along the axial direction (i.e., parallel to the width direction of the strip) of the roll surfaces of the pinch rolls 11 and 12. This roll shape aims to ensure optimal contact between the pinch rolls 11 and 12 and the strip, thereby achieving a uniform pinching pressure distribution and avoiding uneven stress on the edges or center of the strip. For example, for wider strips, the roll surface can be designed with a slight convex or concave shape to compensate for the elastic deformation of the roll body under stress, or to accommodate the slight thickness changes of the strip in the width direction, ensuring effective clamping across the entire width.

[0040] Optionally, the outlet clamping device further includes a safety pin located below the clamping lower roller 12 to secure the clamping lower roller 12 during maintenance.

[0041] In this embodiment, the safety pin is a mechanical locking device designed to physically prevent unintended movement of components. Specifically, the safety pin can be a robust metal pin, a bolt, or a wedge, which, by inserting into a pre-set hole or slot, mechanically blocks the movement of the lower clamping roller 12. During implementation, the safety pin should be made of a material with sufficient strength and rigidity to withstand the weight of the lower clamping roller 12 and any potential impact forces. Simultaneously, the hole or slot for inserting the safety pin should be precisely machined and fit the safety pin to ensure smooth insertion and reliable fixation. The safety pin is located below the lower clamping roller 12; this position ensures that the safety pin can effectively support the lower clamping roller 12 from below, preventing it from falling due to gravity. In practical applications, a support structure or guide groove can be integrated into the main frame of the outlet clamping device to facilitate the insertion and positioning of the safety pin. Once the lower clamping roller 12 is raised to the required height for maintenance by the lifting and pressing assembly, the safety pin can be manually or automatically inserted into a preset position to physically lock the lower clamping roller 12. The function of the safety pin is to secure the lower clamping roller 12 during maintenance. This means that during maintenance, inspection, cleaning, or component replacement of the outlet clamping device, the safety pin provides independent and reliable mechanical support. Even if the hydraulic system of the lifting and pressing assembly loses pressure or the electrical control system malfunctions, the lower clamping roller 12 can be safely fixed in the designated position, preventing accidental falls.

[0042] Optionally, the pre-shear clamping device further includes a pre-shear hydraulic cylinder, which is located inside the frame 3 and connected to the bearing seat of the pre-shear lower roller 42 to drive the pre-shear lower roller 42 to rise and fall.

[0043] In this embodiment, the pre-shear hydraulic cylinder is an actuator capable of converting hydraulic energy into mechanical energy. It controls the pressure and flow rate of hydraulic oil to achieve the reciprocating linear motion of the piston rod, thereby generating thrust or pull. In this embodiment, the pre-shear hydraulic cylinder is designed to provide sufficient lifting force to overcome the weight of the lower pre-shear roller 42, friction, and the clamping force on the strip, and to withstand the impact load generated when the strip passes through. It can be a single-acting or double-acting hydraulic cylinder, the specific choice depending on the required control precision and reset method. The magnitude of the force provided by the hydraulic cylinder can be adjusted online via a proportional pressure reducing valve.

[0044] Integrating the pre-shear hydraulic cylinder within frame 3 helps optimize the overall structural layout of the equipment, making it more compact and stable. This arrangement effectively protects the hydraulic cylinder from external environmental contamination and mechanical damage, while ensuring that the thrust or pull of the hydraulic cylinder can act directly and efficiently on the bearing housing of the pre-shear lower roller 42, reducing energy loss and backlash in the transmission process.

[0045] The output end of the hydraulic cylinder before shearing, such as the piston rod, is connected to the bearing housing of the lower roller 42 before shearing via a mechanical connection (such as a pin, bolt connection, or integrated structure). This connection method ensures that the movement of the hydraulic cylinder can be directly transmitted to the bearing housing of the lower roller 42 before shearing, thereby achieving precise lifting and lowering control of the lower roller 42. The design of the connection should consider sufficient strength and rigidity to withstand the working load and ensure transmission accuracy.

[0046] Optionally, the outlet clamping device and the pre-shear clamping device are positioned along the strip conveying direction (see attached diagram). Figure 1 A thickness gauge 8 and a plate roller 9 are sequentially installed in the opposite direction of the X-axis.

[0047] In this embodiment, in conjunction with the appendix Figure 1 As shown, the thickness gauge 8 is a device used for online measurement of strip thickness. It can be implemented using various technologies; for example, it can be an X-ray thickness gauge, which determines the thickness by emitting X-rays that penetrate the strip and measuring their attenuation; it can also be an isotope thickness gauge, which uses a radioactive isotope source and detector for measurement; or it can be an ultrasonic thickness gauge, which calculates the thickness by the propagation time of ultrasonic waves in the strip. The thickness gauge 8 is designed to provide real-time data on strip thickness for precise monitoring of the rolling process.

[0048] The strip shape roller 9 is a specialized roller used to detect the shape (straightness) of strip steel. This roller typically consists of multiple independent measuring units or sensors distributed along the roller's axial direction, capable of measuring the tension distribution at different locations along the strip's width. As the strip passes through the roller 9, if shape defects exist (such as edge waviness, center waviness, or warping), the tension in the strip will change at different width locations. These changes are captured by the sensors on the roller 9 and converted into electrical signals, thus reflecting the strip's shape condition. The strip shape roller 9 is designed to provide real-time feedback on strip shape, providing a basis for shape control.

[0049] Optionally, the equipment at the exit section of this continuous rolling mill also includes a flying shear 100, an exit guide roller 200, and a coiler 300, which are arranged sequentially downstream of the pre-shear clamping device along the strip conveying direction.

[0050] In this embodiment, in conjunction with the appendix Figure 1As shown, the flying shear 100 is a device used for transverse shearing of strip steel during continuous movement. Its main function is to precisely shear continuous strip steel to a preset length without interrupting the production line, thereby forming independent sheets or providing strip steel segments of fixed length for subsequent coiling. The flying shear 100 typically consists of a shearing mechanism, a drive mechanism, and a control system. The shearing mechanism can use rotary or reciprocating shears, achieving high-speed, high-precision shearing by moving synchronously with the strip steel speed. The drive mechanism provides the power required for shearing, while the control system precisely controls the shearing timing and length according to production instructions and strip steel speed.

[0051] The exit guide roller 200 is located downstream of the flying shear 100. Its function is to guide the sheared strip or continuous strip to change its conveying direction or maintain a stable conveying path, allowing it to smoothly and accurately enter the subsequent coiler 300. The exit guide roller 200 is typically one or more rollers with a certain diameter, and its surface can be specially treated to increase friction or prevent strip damage. By adjusting the position, angle, or number of exit guide rollers 200, the running trajectory and tension of the strip can be precisely controlled, ensuring that the strip does not deviate, accumulate, or scrape during high-speed operation.

[0052] The coiler 300 is the end-of-line equipment in a continuous rolling production line, used to wind sheared and guided strip steel into tight coils. The coiler 300 typically includes a retractable drum, pressure rollers, a guide device, and a tension control system. Under tension, the strip steel is evenly wound onto the drum to form a regular coil. The coiler 300 enables high-speed winding and ensures that the coil ends are neat and the coil shape is good, facilitating subsequent handling, storage, and further processing.

[0053] Optionally, the elastic buffer 6 is a disc spring.

[0054] In this embodiment, in conjunction with the appendix Figure 3 As shown, a disc spring, also known as a disc spring, is a ring-shaped elastic element with a conical cross-section. Its main characteristics are compact structure, high load-bearing capacity, short stroke, and adjustable stiffness. The disc spring provides elastic buffering force by deforming under compression through its conical structure. In the pre-shear clamping device, designing the elastic buffer 6 as a disc spring allows for sufficient buffering force within a limited space, utilizing its high load-bearing capacity and compactness to absorb the impact load generated during shearing. The stiffness of the disc spring can be precisely adjusted by changing its thickness, outer diameter, inner diameter, and stacking method (such as series, parallel, or mixed stacking), thus enabling its buffering characteristics to better adapt to the needs of different strip specifications and shearing conditions.

[0055] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A continuous rolling mill outlet section equipment, characterized in that, The device includes an outlet clamping device and a pre-shear clamping device arranged sequentially along the strip conveying direction; the outlet clamping device includes a clamping roller group (1), an active drive assembly (2), and a lifting and pressing assembly. The clamping roller group (1) includes an upper clamping roller (11) and a lower clamping roller (12). The active drive assembly (2) is connected to the upper clamping roller (11) and the lower clamping roller (12) to actively drive the upper clamping roller (11) and the lower clamping roller (12) to rotate. The lifting and pressing assembly is connected to the lower clamping roller (12) to drive the lower clamping roller (12) to move closer to or away from the upper clamping roller (11); the pre-shear clamping device... The assembly includes a frame (3), a pre-shear roller group (4), and an elastic buffer (6). The pre-shear roller group (4) includes an upper pre-shear roller (41) and a lower pre-shear roller (42). Both ends of the upper pre-shear roller (41) and the lower pre-shear roller (42) are provided with bearing seats. The frame (3) is located on both sides of the upper pre-shear roller (41) and the lower pre-shear roller (42). The bearing seat of the upper pre-shear roller (41) is fixedly located in the frame (3), and the bearing seat of the lower pre-shear roller (42) is slidably located in the frame (3). The elastic buffer (6) is located between the bearing seat of the upper pre-shear roller (41) and the bearing seat of the lower pre-shear roller (42).

2. The continuous rolling mill outlet section equipment according to claim 1, characterized in that, The active drive assembly (2) includes an upper roller motor (21), a lower roller motor (22), an upper roller connecting shaft (23), and a lower roller connecting shaft (24). The upper roller motor (21) is connected to the clamping upper roller (11) via the upper roller connecting shaft (23), and the lower roller motor (22) is connected to the clamping lower roller (12) via the lower roller connecting shaft (24). Both the upper roller connecting shaft (23) and the lower roller connecting shaft (24) are covered with protective covers (5).

3. The equipment at the outlet section of the continuous rolling mill according to claim 1, characterized in that, The upper roller motor (21) and the lower roller motor (22) are respectively equipped with encoders. The equipment at the exit section of the continuous rolling mill also includes a control module. The control module is connected to the encoder, the upper roller motor (21) and the lower roller motor (22) respectively to adjust the linear speed of the pinching upper roller (11) and the pinching lower roller (12) according to the strip speed.

4. The equipment at the outlet section of the continuous rolling mill according to claim 1, characterized in that, The lifting and pressing assembly includes a hydraulic cylinder (7) and a proportional valve. The output end of the hydraulic cylinder (7) is connected to the clamping lower roller (12). The proportional valve is located in the hydraulic pipeline of the hydraulic cylinder (7) to adjust the output pressure of the hydraulic cylinder (7).

5. The continuous rolling mill outlet section equipment according to claim 1, characterized in that, Both the upper pinch roll (11) and the lower pinch roll (12) are steel rolls, and the roll surfaces of the upper pinch roll (11) and the lower pinch roll (12) have a set roll shape that matches the width direction of the strip.

6. The equipment at the exit section of the continuous rolling mill according to claim 1, characterized in that, The outlet clamping device also includes a safety pin located below the clamping lower roller (12) to secure the clamping lower roller (12) during maintenance.

7. The continuous rolling mill outlet section equipment according to claim 1, characterized in that, The pre-shear clamping device also includes a pre-shear hydraulic cylinder, which is located inside the frame (3) and connected to the bearing seat of the pre-shear lower roller (42) to drive the pre-shear lower roller (42) to rise and fall.

8. The continuous rolling mill outlet section equipment according to claim 1, characterized in that, A thickness gauge (8) and a strip roll (9) are sequentially installed between the outlet clamping device and the pre-shear clamping device along the strip conveying direction.

9. The continuous rolling mill outlet section equipment according to claim 1, characterized in that, It also includes a flying shear (100), an exit guide roller (200), and a coiler (300) arranged sequentially downstream of the shearing clamping device along the strip conveying direction.

10. The continuous rolling mill outlet section equipment according to claim 1, characterized in that, The elastic buffer (6) is a disc spring.

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