Automatic centering device for cold-rolled steel strip

Abstract

The present application relates to cold-rolled steel strip processing equipment technical field, especially provide cold-rolled steel strip automatic centering device, including fixed base, linear guide, movable fulcrum seat, fulcrum drive motor, swing frame, centering guide roller, pressure sensor, servo electric cylinder, strip photoelectric sensor and controller;The linear guide is fixed on the upper end surface of the fixed base, the movable fulcrum seat is slidably adapted to the linear guide, the fulcrum drive motor is fixed on the fixed base, and the movable fulcrum seat is driven to reciprocating displacement adjustment along the linear guide;The swing frame is hinged above the movable fulcrum seat, when the large deviation or the tension is higher, the swing frame can be switched to the long drive arm, short load arm state, so that the output force of the servo electric cylinder is converted into larger correction torque through lever structure, for improving the action stability when large load correction.

Description

Technical Field

[0001] This invention relates to the field of cold-rolled steel strip processing equipment, and particularly to an automatic centering device for cold-rolled steel strip. Background Technology

[0002] During continuous production, cold-rolled steel strip is prone to lateral deviation during feeding and conveying due to factors such as raw material shape deviation, conveyor roller assembly errors, production line vibration, and steel strip tension fluctuations. If continuous deviation is not corrected in time, it can easily lead to quality defects such as edge wear, surface wrinkles, localized steel accumulation, and uneven tension. In severe cases, it can even cause production line shutdowns, affecting the continuous operation efficiency and finished product qualification rate of the cold rolling production line. Currently, commonly used steel strip correction devices mostly employ a fixed fulcrum lever adjustment structure. This structure is relatively simple and can meet the basic correction requirements under normal stable operating conditions, making it quite common in steel strip conveyor production lines.

[0003] Existing fixed-fulcrum type correction equipment uses constant lever arm ratios and has a fixed and singular adjustment mode, making it difficult to accommodate the various operating conditions during cold rolling production, such as high-speed switching and high-tension alternation. Under conditions of high-speed, small-amplitude strip deviation, the constant lever arm structure lacks sufficient adjustment sensitivity and fine-tuning accuracy, easily leading to correction lag, overcorrection, or undercorrection, potentially causing scratches on the strip surface. Conversely, under conditions of large-amplitude strip deviation and high-tension offset, the constant lever arm structure cannot amplify torque, resulting in insufficient correction driving force and difficulty in overcoming the offset resistance of the high-tension strip, thus reducing correction stability. Summary of the Invention

[0004] To address the above problems, the present invention provides an automatic centering device for cold-rolled steel strip, comprising a fixed base, a linear guide rail, a movable fulcrum seat, a fulcrum drive motor, a swing frame, a centering guide roller, a pressure sensor, a servo electric cylinder, a strip photoelectric sensor, and a controller. The linear guide rail is fixed to the upper surface of the fixed base, the movable fulcrum seat is slidably adapted to the linear guide rail, and the fulcrum drive motor is fixed to the fixed base and drives the movable fulcrum seat to move back and forth along the linear guide rail for adjustment. The swing frame is hinged above the movable fulcrum base, and the swing frame is provided with a guide groove. The servo electric cylinder is hinged to the fixed base, and its telescopic end is slidably engaged with the guide groove. The steel strip is fed through the centering guide roller. The centering guide roller is connected to the swing frame and is parallel to the top of the swing frame. The telescopic end of the servo electric cylinder slides in the guide groove, so that the swing frame drives the centering guide roller to switch between horizontal and inclined states around the hinge support, so as to form the lateral correction force required for the steel strip to be corrected. The movable fulcrum seat is equipped with a pressure sensor at each end of the swing frame. The two pressure sensors are respectively abutted against the bottom of the swing frame to collect the pressure difference signal formed by the tilt of the swing frame. The centering guide roller is equipped with two sets of strip photoelectric sensors on the feeding side, corresponding to the two sides of the steel strip, to detect the amount and speed of the steel strip deviation. The controller can adjust the position of the movable fulcrum seat by regulating the fulcrum drive motor according to the detection signals of the bar photoelectric sensor and the pressure sensor, dynamically change the ratio of the driving force arm and load force arm of the swing frame relative to both sides of the hinge support, and simultaneously control the servo electric cylinder to drive the swing frame to drive the centering guide roller to deflect, thereby realizing the centering and correction of the steel strip.

[0005] As a further preferred embodiment: the output end of the fulcrum drive motor is connected to an adjusting screw, the adjusting screw is arranged along the extension direction of the linear guide rail, the movable fulcrum seat is threadedly assembled on the adjusting screw, and the fulcrum drive motor drives the movable fulcrum seat to perform high-precision linear sliding adjustment along the linear guide rail by the forward and reverse rotation of the adjusting screw.

[0006] As a further preferred embodiment: the tail of the servo electric cylinder is hinged with an electric cylinder hinge seat, which is fixedly installed on the fixed base, so that the servo electric cylinder can adapt to the angle fine adjustment and maintain a horizontal lateral push-pull posture, providing driving force for the horizontal and deflection of the swing frame.

[0007] As a further preferred embodiment: the top surface of the movable fulcrum is fixed with a hinge support, the middle part of the swing frame is hinged to the hinge support, the guide groove is opened at one end near the servo cylinder, the telescopic end of the servo cylinder is provided with a sliding slider, and the sliding slider is slidably engaged in the guide groove.

[0008] As a further preferred embodiment: the two ends of the swing frame are fixed with U-shaped supports, and the centering guide roller is composed of an internal metal shaft and a rubber rolling element that rotates around the outside of the metal shaft, wherein the two ends of the metal shaft are fixedly connected to the two U-shaped supports.

[0009] As a further preferred embodiment: the two side walls of the movable fulcrum are symmetrically fixed with support arms, the two support arms are located at the bottom of the two sides of the swing frame, one set of pressure sensors is mounted on the support arm on the same side relative to the bottom of one side of the swing frame, and the other set of pressure sensors is mounted on the support arm on the other side relative to the bottom of the other side of the swing frame.

[0010] As a further preferred embodiment, the fulcrum drive motor and the servo electric cylinder are respectively located on opposite sides of the movable fulcrum base.

[0011] As a further preferred embodiment: the pressure sensor is fixedly embedded in the upper end face of the corresponding side support arm, and the two sets of pressure sensors are symmetrically arranged on the left and right sides of the hinge support, with the sensing end face of the pressure sensor facing vertically upward and in perpendicular contact with the bottom surface of the swing frame.

[0012] The advantages of this invention compared to the prior art are: This device employs a variable lever arm structure for adjustment, overcoming the limitation of fixed lever arm structures in terms of limited adjustment options under different operating conditions. It adaptively switches the length ratio of the drive arm and load arm of the swing frame according to varying deviation amplitudes and tension states of the steel strip. By switching to a short drive arm and long load arm structure, the mechanism's adjustment sensitivity is enhanced, enabling flexible fine-tuning with small strokes, adapting to high-speed, small-amplitude steel strip deviation conditions and reducing impact during correction. Under conditions of large deviations or high tension, the swing frame can be switched to a long drive arm and short load arm configuration, converting the output force of the servo cylinder into a larger correction torque via the lever structure, improving operational stability under heavy loads. Real-time monitoring of steel strip deviation dynamics by a strip photoelectric sensor and real-time feedback of the swing frame's skewed force state by a pressure sensor form a dual-parameter collaborative closed-loop control, improving correction response and detection stability, and adapting to high-speed continuous operation conditions in cold rolling production lines. The sliding adaptation structure between the telescopic end and the guide groove reduces adjustment interference and jamming risks, resulting in smoother overall operation. This also helps reduce surface scratches caused by steel strip deviation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram from a first-view perspective of the automatic centering device for cold-rolled steel strip described in an embodiment of the present invention; Figure 2 This is a schematic diagram from a second perspective of the automatic centering device for cold-rolled steel strip described in an embodiment of the present invention; Figure 3 This is a front view schematic diagram of the automatic centering device for cold-rolled steel strip described in an embodiment of the present invention; Figure 4 This is a side view of the automatic centering device for cold-rolled steel strip described in an embodiment of the present invention; Figure 5 This is a schematic diagram showing the automatic centering device for cold-rolled steel strip described in an embodiment of the present invention after it has been disconnected.

[0014] In the diagram: 1. Fixed base; 2. Linear guide rail; 3. Movable fulcrum seat; 4. Fulcrum drive motor; 5. Swing frame; 6. Centering guide roller; 7. Pressure sensor; 8. Servo electric cylinder; 9. Strip photoelectric sensor; 10. Controller; 11. U-shaped support; 12. Guide groove; 13. Hinge support; 14. Adjusting screw; 15. Electric cylinder hinge seat; 16. Sliding slider; 17. Metal shaft; 18. Rubber rolling element; 19. Support arm. Detailed Implementation

[0015] The above and other embodiments and advantages of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0016] In one implementation, such as Figures 1-5 As shown: This embodiment provides an automatic centering device for cold-rolled steel strip, including a fixed base 1, a linear guide rail 2, a movable fulcrum base 3, a fulcrum drive motor 4, a swing frame 5, a centering guide roller 6, a pressure sensor 7, a servo electric cylinder 8, a strip photoelectric sensor 9, and a controller 10. The linear guide rail 2 is fixed to the upper surface of the fixed base 1, the movable fulcrum seat 3 is slidably adapted to the linear guide rail 2, the fulcrum drive motor 4 is fixed to the fixed base 1, and the movable fulcrum seat 3 is driven to move back and forth along the linear guide rail 2 for adjustment. The swing frame 5 is hinged above the movable fulcrum 3. The swing frame 5 has a guide groove 12. The servo electric cylinder 8 is hinged to the fixed base 1, and its telescopic end is slidably engaged with the guide groove 12. The steel strip is fed through the centering guide roller 6. The centering guide roller 6 is transferred to the swing frame 5 and is parallel to the top of the swing frame 5. The extension end of the servo electric cylinder 8 slides in the guide groove 12, so that the swing frame 5 drives the centering guide roller 6 to switch between horizontal and inclined states around the hinge support 13, so as to form the lateral correction force required for the steel strip correction. A pressure sensor 7 is installed at each end of the swing frame 5 on the movable fulcrum 3. The two pressure sensors 7 are respectively abutted against the bottom of the swing frame 5 to collect the pressure difference signal formed by the tilt of the swing frame 5. Two sets of strip photoelectric sensors 9 are installed on the feed side of the centering guide roller 6, corresponding to the two sides of the steel strip, to detect the amount and speed of the steel strip deviation. The controller 10 can adjust the position of the movable fulcrum seat 3 by regulating the fulcrum drive motor 4 according to the detection signals of the bar photoelectric sensor 9 and the pressure sensor 7, dynamically change the ratio of the driving force arm and load force arm of the swing frame 5 relative to both sides of the hinge support 13, and simultaneously control the servo electric cylinder 8 to drive the swing frame 5 to drive the centering guide roller 6 to deflect, thereby realizing the centering and correction of the steel strip.

[0017] Of the aforementioned components, the linear guide rail 2 is fixedly arranged on the upper surface of the fixed base 1 along the conveying direction of the steel belt. The movable fulcrum seat 3 is slidably fitted onto the linear guide rail 2. The fulcrum drive motor 4 is fixedly installed on the fixed base 1 and is used to drive the movable fulcrum seat 3 to perform reciprocating adjustment along the linear guide rail 2. A hinged support 13 is provided above the movable fulcrum seat 3, and the swing frame 5 is hingedly fitted onto the hinged support 13, enabling the swing frame 5 to deflect and swing with the hinged support 13 as the fulcrum. A guide groove 12 is provided on the swing frame 5, and the servo cylinder 8 is integrally hinged onto the fixed base 1. The telescopic end of the servo cylinder 8 forms a sliding engagement with the guide groove 12. During the telescopic drive of the servo cylinder 8, its telescopic end can slide relative to the guide groove 12, adapting to the deflection posture of the swing frame 5, reducing transmission jamming, and ensuring continuous swing adjustment. The centering guide roller 6 is mounted above and parallel to the swing frame 5, and the steel strip feed end relies on the centering guide roller 6 for feeding. The servo electric cylinder 8 drives the swing frame 5 through the sliding cooperation between its telescopic end and the guide groove 12, causing the swing frame 5 to drive the centering guide roller 6 to switch between horizontal and inclined states around the hinge support 13. The tilting of the centering guide roller 6 generates the lateral correction force required for steel strip correction, thus realizing the correction of steel strip deviation. A set of pressure sensors 7 are respectively mounted on the movable fulcrum base 3 at the lower positions of both ends of the swing frame 5. The tops of the two sets of pressure sensors 7 abut against the bottom end face of the swing frame 5, which can collect the pressure difference signal generated at both ends during the deflection of the swing frame 5 in real time. Two sets of bar photoelectric sensors 9 are set on the feed side of the centering guide roller 6. The two sets of bar photoelectric sensors 9 are respectively arranged on both sides of the steel strip edge, which are used to detect the deviation amount and deviation speed of the steel strip in real time, providing a detection basis for correction and control.

[0018] The working principle is described through three operating conditions: Operating Condition 1: Under normal production conditions, the cold-rolled steel strip is conveyed smoothly and centrally without any lateral deviation. At this time, the strip edge position data detected by the strip photoelectric sensor 9 is accurate, the swing frame 5 remains horizontal and straight, and the pressure sensors 7 at both ends experience uniform force with zero differential pressure. The controller 10 determines that the steel strip is in the centering state and does not output any correction action. The fulcrum drive motor 4 and servo cylinder 8 remain stationary, the movable fulcrum seat 3 is fixed in position, and the centering guide roller 6 maintains a horizontal posture, ensuring continuous and smooth conveying of the steel strip.

[0019] Operating Condition 2: When a slight deviation occurs in the steel belt conveyor, a minute offset occurs at the edge of the steel belt. The strip photoelectric sensor 9 captures the deviation amplitude and speed signals in real time and transmits them to the controller 10. The deviated steel belt exerts a weak lateral force on the centering guide roller 6, causing a slight tilt in the swing frame 5, which generates a differential pressure feedback signal from the pressure sensors 7 at both ends of the swing frame 5. The controller 10 combines the two detection signals to accurately determine the deviation condition and controls the fulcrum drive motor 4 to slightly shift the movable fulcrum seat 3, dynamically adjusting the fulcrum position of the hinge support 13, so that the swing frame 5 forms a force arm ratio structure with a short drive arm and a long load arm. Here, the drive arm refers to the frame section from the point of action of the servo electric cylinder 8 to the hinge support 13, and the load arm refers to the frame section from the point of force application of the centering guide roller 6 to the hinge support 13. Under this condition, the fulcrum is offset to the guide roller, the drive arm is short, and the load arm is long, and the mechanism has the characteristics of high sensitivity and fine-tuning stroke. Subsequently, the servo electric cylinder 8 is synchronously controlled to extend and retract, causing the centering guide roller 6 to tilt slightly, outputting a gentle lateral correction force to smoothly and flexibly correct the slight deviation of the steel strip under high-speed conditions.

[0020] Condition 3: When the steel strip experiences significant deviation and high tension offset, the deviation is large and the lateral force is strong. The strip photoelectric sensor 9 and pressure sensor 7 synchronously output a large deviation signal. The controller 10 adaptively adjusts the fulcrum drive motor 4, readjusts the position of the movable fulcrum seat 3, and switches the ratio of the drive arm and load arm of the swing frame 5, forming a lever structure with a long drive arm and a short load arm. Under this condition, the fulcrum shifts towards the servo cylinder, the length of the drive arm from the action point of the servo cylinder 8 to the hinge support 13 is longer, and the length of the load arm from the force point of the centering guide roller 6 to the hinge support 13 is shorter. By utilizing the change in the lever arm, the correction torque corresponding to the output force of the servo cylinder 8 is increased, enabling the swing frame 5 and the centering guide roller 6 to generate corresponding lateral correction force under large deviation, thereby overcoming the offset resistance of the high-tension steel strip and reducing the possibility of production abnormalities such as steel strip wrinkling, uneven wear, and steel piling. At the same time, the sliding fit structure can compensate for the deflection displacement, ensuring continuous correction action.

[0021] Once the steel belt deviation is corrected and the steel belt returns to the centered conveying state, the signal detected by the bar photoelectric sensor 9 returns to the centering reference, and at the same time, the differential pressure signal of the pressure sensors 7 on both sides of the swing frame 5 returns to zero. After the controller 10 detects that both signals have returned to the normal operating threshold, it determines that the correction action is complete, and then controls the servo cylinder 8 to retract and reset, driving the swing frame 5 and the centering guide roller 6 to automatically return from the tilted posture to the horizontal reference posture; at the same time, the fulcrum drive motor 4 resets the movable fulcrum seat 3 to the normal centering fulcrum position according to the system reference parameters, so that the swing frame 5 returns to the normal adaptive standby lever arm state, the equipment automatically resets, enters the real-time monitoring state, and waits for the next deviation adjustment, forming a continuous closed-loop automatic correction operation.

[0022] This device employs a movable fulcrum and variable lever arm structure, which overcomes the limitation of fixed lever arm structures in terms of adjustment methods under different working conditions. It adaptively switches the length ratio of the drive arm and load arm of the swing frame according to different deviation amplitudes and tension states of the steel strip. By switching to a short drive arm and long load arm structure, the adjustment sensitivity of the mechanism is improved, enabling flexible fine-tuning of small strokes, adapting to high-speed, small-amplitude steel strip deviation conditions, and reducing impact during the correction process. Under conditions of large deviation or high tension, the swing frame can be switched to a long drive arm and short load arm state, allowing the output force of the servo electric cylinder to be converted into a larger correction torque through the lever structure, improving the stability of the action during high-load correction. This device uses a strip photoelectric sensor to monitor the steel strip deviation dynamics in real time, and a pressure sensor to provide real-time feedback on the skew force state of the swing frame, forming a dual-parameter collaborative closed-loop control. This improves the correction response and detection stability, making it suitable for high-speed continuous operation conditions in cold rolling production lines. Simultaneously, the reasonable layout of each component and smooth transmission coordination, along with the sliding adaptation structure between the telescopic end and the guide groove, reduce adjustment interference and jamming risks, resulting in relatively stable overall operation. It helps reduce surface scratches caused by steel belt misalignment and improves the on-site applicability of the device.

[0023] Specifically: The output end of the fulcrum drive motor 4 is connected to an adjusting screw 14. The adjusting screw 14 is arranged along the extension direction of the linear guide rail 2. The movable fulcrum seat 3 is threadedly assembled on the adjusting screw 14. The fulcrum drive motor 4 drives the movable fulcrum seat 3 to make linear sliding adjustment along the linear guide rail 2 by the forward and reverse rotation of the adjusting screw 14.

[0024] The output end of the fulcrum drive motor 4 is equipped with an adjusting screw 14, which is horizontally arranged along the length of the linear guide rail 2. The bottom of the movable fulcrum seat 3 is fitted with a threaded assembly structure and threaded onto the adjusting screw 14, forming a screw-nut transmission pair. During operation, the fulcrum drive motor 4 can drive the adjusting screw 14 to rotate in both forward and reverse directions. This threaded transmission causes the movable fulcrum seat 3 to smoothly slide linearly along the linear guide rail 2, ensuring the stability of the fulcrum position adjustment and providing a structural basis for switching lever arm ratios.

[0025] Specifically: The tail of the servo electric cylinder 8 is hinged with an electric cylinder hinge seat 15, which is fixedly installed on the fixed base 1, so that the servo electric cylinder 8 can adapt to the deflection angle change of the swing frame 5 during the extension and retraction process, and apply a lateral pushing and pulling force to the swing frame 5.

[0026] The servo electric cylinder 8 is hinged at the tail and fitted with an electric cylinder hinge seat 15, which is securely mounted on the fixed base 1 at a preset installation position. Through the tail hinge structure, the servo electric cylinder 8 can make small angle adjustments according to the deflection angle of the swing frame 5 during the telescopic drive process, so as to maintain the lateral push-pull operation posture, reduce problems such as electric cylinder jamming, and make the driving force output by the servo electric cylinder 8 act on the deflection action of the swing frame 5.

[0027] Specifically: The top surface of the movable fulcrum 3 is fixed with a hinge support 13, the middle part of the swing frame 5 is hinged to the hinge support 13, the guide groove 12 is opened at one end of the servo cylinder 8, and the telescopic end of the servo cylinder 8 is provided with a sliding slider 16, which is slidably engaged in the guide groove 12.

[0028] A hinged support 13 is fixedly mounted on the top surface of the movable fulcrum 3. The center position of the swing frame 5 is hingedly mounted on the hinged support 13, allowing the swing frame 5 to swing left and right with the hinged support 13 as the rotation fulcrum. A guide groove 12 is provided at the end of the swing frame 5 near the servo cylinder 8. A sliding slider 16 is fixedly mounted on the telescopic end of the servo cylinder 8, and the sliding slider 16 is limited and slidably engaged inside the guide groove 12. During the telescopic push-pull process of the servo cylinder 8, the sliding slider 16 can slide along the guide groove 12 and compensate for the positional deviation caused by the deflection of the swing frame 5, reducing motion interference caused by rigid transmission and making the deflection action of the swing frame 5 smoother.

[0029] Specifically: the two ends of the swing frame 5 are fixed with U-shaped supports 11, and the centering guide roller 6 is composed of an internal metal shaft 17 and a rubber rolling element 18 that is rotatably fitted to the outside of the metal shaft 17, wherein the two ends of the metal shaft 17 are fixedly connected to the two U-shaped supports 11.

[0030] U-shaped supports 11 are fixedly installed at both ends of the swing frame 5. The two sets of U-shaped supports 11 are symmetrically arranged to support and install the centering guide roller 6. The centering guide roller 6 adopts a split composite structure, mainly composed of a metal shaft 17 and rubber rolling elements 18. The metal shaft 17 serves as the load-bearing base, and its two ends are fixedly connected to the U-shaped supports 11 on both sides, improving the overall structural stability of the guide roller. The rubber rolling elements 18 are rotatably fitted onto the outside of the metal shaft 17 and can rotate freely relative to the metal shaft 17. The metal shaft 17 ensures the structural strength and load-bearing rigidity of the guide roller and avoids deformation under heavy loads. The outer rubber rolling elements 18 are in direct contact with the steel belt, which increases the contact friction between the rubber rolling elements and the steel belt and reduces the surface scratches caused by direct contact between the hard metal roller and the steel belt.

[0031] Specifically: Support arms 19 are symmetrically fixed on both sides of the movable fulcrum seat 3. The two support arms 19 are located at the bottom of both sides of the swing frame 5. One set of pressure sensors 7 is installed on the support arm 19 on the same side relative to the bottom of one side of the swing frame 5, and the other set of pressure sensors 7 is installed on the support arm 19 on the other side relative to the bottom of the other side of the swing frame 5.

[0032] Two sets of support arms 19 extend horizontally outward and are respectively arranged at the bottom of both sides of the swing frame 5, forming a stable bottom support installation structure. A set of pressure sensors 7 are respectively installed on the two support arms 19. The two sets of pressure sensors 7 are symmetrically distributed at the bottom of both sides of the swing frame 5, respectively detecting the pressure state at the left and right ends of the swing frame 5. They are used to collect the pressure difference signal generated during the tilting process of the swing frame 5, providing force feedback basis for the device's correction and control.

[0033] Specifically: the fulcrum drive motor 4 and the servo electric cylinder 8 are respectively located on opposite sides of the movable fulcrum base 3.

[0034] This layout lays the foundation for the bidirectional lever arm partitioning of the swing frame 5. With the movable fulcrum 3 and the hinged support 13 as the dividing line, the side where the servo cylinder 8 is located constitutes the driving lever arm side of the device, and the side where the centering guide roller 6 is located constitutes the load lever arm side. Relying on this opposing arrangement, the length of the lever arms on both sides can be dynamically switched by sliding the fulcrum left and right, forming a lever ratio structure with different lengths, which serves as the layout basis for the lever arm adjustment of this device.

[0035] Specifically: the pressure sensor 7 is fixedly embedded on the upper end face of the corresponding side support arm 19, and the two sets of pressure sensors 7 are symmetrically arranged on the left and right sides of the hinge support 13. The sensing end face of the pressure sensor 7 is vertically upward and in vertical contact with the bottom surface of the swing frame 5.

[0036] Two sets of pressure sensors 7 are symmetrically arranged around the hinged support 13. The sensing end face of the pressure sensor 7 is vertically upward and in close contact with the bottom surface of the swing frame 5. This installation method is beneficial for the pressure sensor 7 to collect pressure changes caused by the tilt of the swing frame 5, reduces detection errors caused by installation gaps or contact offsets, and improves the stability of differential pressure signal acquisition.

[0037] The above orientation references do not represent the specific orientations of each component in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme and to make relative descriptions based on the orientations of the references. In reality, the specific orientations of each component are based on their actual installation and use, as well as the orientation descriptions that are customary to those skilled in the art. This is hereby stated.

[0038] The specific embodiments described above further illustrate the inventive purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, or improvements made by those skilled in the art within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic centering device for cold-rolled steel strip, characterized in that, It includes a fixed base (1), a linear guide rail (2), a movable fulcrum base (3), a fulcrum drive motor (4), a swing frame (5), a centering guide roller (6), a pressure sensor (7), a servo electric cylinder (8), a strip photoelectric sensor (9), and a controller (10). The linear guide rail (2) is fixed to the upper surface of the fixed base (1), the movable fulcrum seat (3) is slidably adapted to the linear guide rail (2), the fulcrum drive motor (4) is fixed to the fixed base (1), and drives the movable fulcrum seat (3) to move back and forth along the linear guide rail (2) for adjustment; The swing frame (5) is hinged above the movable fulcrum seat (3). The swing frame (5) is provided with a guide groove (12). The servo electric cylinder (8) is hinged to the fixed base (1), and its telescopic end is slidably engaged with the guide groove (12). The steel strip is fed through the centering guide roller (6). The centering guide roller (6) is connected to the swing frame (5) and is parallel to the swing frame (5). The telescopic end of the servo cylinder (8) slides in the guide groove (12) to realize that the swing frame (5) drives the centering guide roller (6) to switch between horizontal and inclined states around the hinge support (13) to form the lateral correction force required for the steel strip correction. The movable fulcrum seat (3) is provided with a pressure sensor (7) at each end of the swing frame (5). The two pressure sensors (7) are respectively abutted against the bottom end of the swing frame (5) to collect the pressure difference signal formed by the tilt of the swing frame (5). The centering guide roller (6) is provided with two sets of strip photoelectric sensors (9) on the feeding side, corresponding to the two sides of the steel strip, to detect the amount and speed of the steel strip deviation. The controller (10) can adjust the position of the movable fulcrum seat (3) by regulating the fulcrum drive motor (4) according to the detection signals of the bar photoelectric sensor (9) and the pressure sensor (7), dynamically change the ratio of the driving force arm and the load force arm of the swing frame (5) relative to the hinge support (13), and synchronously control the servo electric cylinder (8) to drive the swing frame (5) to drive the centering guide roller (6) to deflect, thereby realizing the centering and correction of the steel strip.

2. The automatic centering device for cold-rolled steel strip according to claim 1, characterized in that: The output end of the fulcrum drive motor (4) is connected to an adjusting screw (14). The adjusting screw (14) is arranged along the extension direction of the linear guide rail (2). The movable fulcrum seat (3) is threadedly fitted onto the adjusting screw (14). The fulcrum drive motor (4) drives the movable fulcrum seat (3) to make linear sliding adjustment along the linear guide rail (2) by the forward and reverse rotation of the adjusting screw (14).

3. The automatic centering device for cold-rolled steel strip according to claim 2, characterized in that: The tail of the servo electric cylinder (8) is hinged with an electric cylinder hinge seat (15), which is fixedly installed on the fixed base (1) so that the servo electric cylinder (8) adapts to the deflection angle change of the swing frame (5) during the extension and retraction process and applies a lateral pushing and pulling force to the swing frame (5).

4. The automatic centering device for cold-rolled steel strip according to claim 3, characterized in that: The top surface of the movable fulcrum (3) is fixed with a hinge support (13), the middle part of the swing frame (5) is hinged to the hinge support (13), the guide groove (12) is opened at one end near the servo cylinder (8), the telescopic end of the servo cylinder (8) is provided with a sliding slider (16), and the sliding slider (16) is slidably engaged in the guide groove (12).

5. The automatic centering device for cold-rolled steel strip according to claim 4, characterized in that: The swing frame (5) is fixed with U-shaped supports (11) at both ends. The centering guide roller (6) is composed of an internal metal shaft (17) and a rubber rolling element (18) rotatably fitted to the outside of the metal shaft (17). The two ends of the metal shaft (17) are fixedly connected to the two U-shaped supports (11).

6. The automatic centering device for cold-rolled steel strip according to claim 5, characterized in that: The movable fulcrum seat (3) has symmetrical support arms (19) fixed on both sides. The two support arms (19) are located at the bottom of both sides of the swing frame (5). One set of pressure sensors (7) is installed on the support arm (19) on the same side relative to one side bottom of the swing frame (5), and the other set of pressure sensors (7) is installed on the support arm (19) on the other side relative to the other side bottom of the swing frame (5).

7. The automatic centering device for cold-rolled steel strip according to claim 6, characterized in that: The fulcrum drive motor (4) and the servo electric cylinder (8) are respectively located on opposite sides of the movable fulcrum base (3).

8. The automatic centering device for cold-rolled steel strip according to claim 7, characterized in that: The pressure sensor (7) is fixedly embedded on the upper end face of the corresponding side support arm (19), and the two sets of pressure sensors (7) are symmetrically arranged on the left and right sides of the hinge support (13). The sensing end face of the pressure sensor (7) is vertically upward and in contact with the bottom surface of the swing frame (5).

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