An automatic calibration and accuracy testing device and method for hot-rolled side guide plates

Abstract

This invention discloses an automatic calibration and accuracy detection device and method for hot-rolled side guide plates, relating to the field of automatic control technology for side guide plates. It includes a swing arm servo motor mounted on a base located outside the operating side guide plate. A roller conveyor is provided between the operating side guide plate and the transmission side guide plate. The swing arm servo motor is connected to the swing arm on the base via a coupling. A rotating rod support is mounted at the other end of the swing arm. A rotating rod motor with a built-in encoder and a rotating rod are mounted on the rotating rod support. A laser rangefinder is mounted at the lower end of the rotating rod. After implementation, operators can safely, efficiently, and accurately complete the automatic calibration of the opening degree of the hot-rolling line side guide plate with a single click. During the process, the mechanical clearance of the guide plate and the parallelism deviation between the guide plate and the rolling center line are measured. No manual intervention is required, solving the problems of low efficiency, long time consumption, and high operational difficulty in existing manual calibration methods.

Description

Technical Field

[0001] This invention relates to the field of automatic control technology for hot rolling line side guide plates, specifically to an automatic calibration and accuracy detection device and method for hot rolling line side guide plates. Background Technology

[0002] The front guide plate of the hot rolling coiler is used to assist the strip in aligning with the center line as it enters the coiler, and together with the pinch rolls, it clamps the strip to reduce the tapering of the coil. Currently, most equipment in the hot rolling coiling area (pinch rolls, coiling aid rolls, etc.) uses a fully automatic calibration method, but the front guide plate of the coiler still uses manual calibration.

[0003] Furthermore, as the equipment wears out and ages, the mechanical clearance increases, the positional accuracy of the side guide plate gradually decreases, and the deviation of the inlet and outlet openings becomes larger, failing to meet production requirements. Currently, the accuracy values ​​still need to be measured and analyzed manually.

[0004] like Figure 1 As shown: Basic structure and configuration of the front guide plate of the coiler:

[0005] The guide plate consists of a guide beam and a wear-resistant plate mounted on the inner side of the guide beam. It is installed above the roller table in front of the pinch roller and is divided into an operating side guide plate and a transmission side guide plate. Each side guide plate is equipped with two hydraulic cylinders, one at the inlet and one at the outlet. Each side outlet hydraulic cylinder is equipped with one displacement sensor. The hydraulic cylinders on each side are synchronized by a mechanical linkage.

[0006] The displacement sensor is used to display the current position of the hydraulic cylinder. Generally, after installation, a hydraulic cylinder stroke calibration is performed (the displacement sensor is calibrated when the hydraulic cylinder is fully retracted). S 1 Once the part is in normal working order (=0mm), no further calibration is required.

[0007] The calibration of the guide plate refers to determining the distance between the inner surface of the wear-resistant plate of the guide beam and the rolling center line. The guide plate is generally replaced weekly. Due to the machining accuracy of the guide beam and factors such as wear and deformation, the guide plate must be calibrated after each replacement to ensure that the actual opening of the guide plate matches the measured value.

[0008] The manual calibration process for the guide plate is as follows: The operator opens the guide plate to its maximum position and uses a steel tape measure to find the center point of the roller; the operator closes the guide plate to its smaller position, measures the horizontal distance from the inner side of the guide plate beam to the center point of the roller, and manually writes the number into the HMI screen system.

[0009] Manual calibration has several disadvantages. First, it requires human intervention throughout the process, with one person at the control panel and at least two people on-site to assist with the measurement. Second, the on-site measurement personnel need to stand on the roller conveyor, posing a safety hazard. Third, the accuracy of manual measurement cannot be guaranteed. Fourth, the entire calibration process is inefficient and time-consuming. Fifth, if the deviation of the inlet and outlet openings needs to be measured, the workload is further increased. Sixth, measuring mechanical clearances is difficult. Summary of the Invention

[0010] The purpose of this invention is to provide an automatic calibration and accuracy detection device and method for hot-rolled side guide plates, which can safely, efficiently and accurately complete the automatic calibration of the opening degree of the hot-rolling line side guide plates with one click, and measure the mechanical clearance of the guide plates and the parallelism deviation between the guide plates and the rolling center line during the process. No manual intervention is required during the process, so as to solve the problems mentioned in the background art.

[0011] To achieve the above objectives, the present invention provides the following technical solution:

[0012] An automatic calibration and accuracy testing device for hot-rolled side guide plates includes a swing arm servo motor, a swing arm, a rotating rod support, a rotating rod, a rotating rod motor with a built-in encoder, a laser rangefinder, and a base. The swing arm servo motor is mounted on the base and connected to the swing arm via a coupling. The rotating rod support is mounted on the other end of the swing arm. The rotating rod motor with the built-in encoder and the rotating rod are mounted on the rotating rod support, and the rotating rod is driven by the rotating rod motor with the built-in encoder. A laser rangefinder is mounted on the lower end of the rotating rod.

[0013] Furthermore, the base is located outside the operating side guide plate, and a transmission side guide plate is provided corresponding to the operating side guide plate. A roller conveyor is provided between the transmission side guide plate and the operating side guide plate.

[0014] Furthermore, the swing arm is a fork-shaped hollow strip structure driven by a swing arm servo motor. One end of the swing arm is mounted on the base through two trunnions, and one trunnion is connected to the swing arm servo motor through a coupling. Under the drive of the swing arm servo motor, it rotates within a 90° working range with the trunnion as the pivot.

[0015] Furthermore, the rotating rod support is cylindrical, and is mounted on the fork-shaped swing arm via trunnions on both sides. The trunnions of the rotating rod support and the swing arm are connected by rolling bearings.

[0016] Furthermore, the rotating rod is vertically installed inside the rotating rod support and is engaged with the rotating rod support via a thrust bearing.

[0017] Furthermore, the rotary rod motor with the built-in encoder is fixedly mounted on the rotary rod support and connected to the rotary rod via a miniature coupling.

[0018] Furthermore, when the swing arm swings down to the horizontal position, the central axis of the rotating rod intersects perpendicularly with the center line of the roller conveyor group, and the entire device is in the calibrated working position. The rotating rod motor with built-in encoder is used to drive the rotating rod to rotate at low speed in both directions.

[0019] Furthermore, the laser rangefinder is connected to the PLC system via a cable, and the PLC system converts the 4-20mA signal from the laser rangefinder into millimeter units through a current signal acquisition template.

[0020] This invention provides another technical solution: an automatic calibration and accuracy detection method for hot-rolled side guide plates, including an automatic calibration and accuracy detection device for hot-rolled side guide plates, the specific steps of which are as follows:

[0021] S1: Set an automatic calibration button on the main control console HMI, edit the PLC program, and implement the button function;

[0022] S2: After the operator presses the button, the automatic calibration control process is activated. Before calibration begins, the two guide plates are in any position, the swing arm is in a position perpendicular to the horizontal plane, the laser rangefinder is perpendicular to the guide plate, and the lens is facing the transmission side.

[0023] S3: After calibration begins, first open both guide plates to their maximum opening position. The method for determining whether they are opened to the maximum position is the stroke of the hydraulic cylinder. S 1 ≤5mm, which means it is close to complete retraction;

[0024] S4: Define the angle when the swing arm is in its original vertical position as 0. o The angle after being completely horizontal is 90 degrees. o When the opening on both sides of the guide plate reaches its maximum position, the swing arm servo motor drives the swing arm to rotate at high speed in the forward direction for 5 seconds. o / s, angle exceeding 85 o Then switch to low speed rotation 1 o / s, rotation distance reaches 90 o When the rotation stops, the swing arm is in a horizontal position, and the rotating rod is perpendicular to the center of the roller conveyor group due to gravity.

[0025] S5: The laser rangefinder is currently perpendicular to the guide beam, with the lens pointing towards the transmission side. The angle at this point is defined as 0. o The distance from the laser rangefinder lens to the center point of the rotating rod is defined as... L c The guide plates on both sides are moved inward by 400mm from their maximum opening position.

[0026] S6: PLC reads laser rangefinder values L ds0, where is the vertical distance from the laser rangefinder lens to the guide beam on the transmission side. At this point, the opening degree of the guide beam on the transmission side is . S ds0 = L ds0 + L c The PLC calibrates the opening degree of the current drive-side guide plate as follows: S ds0 ;

[0027] S7: Rotate the lever counterclockwise by 60 degrees. o The PLC reads the laser rangefinder value at this time. L ds60 The angular distance from laser rangefinder 1 to the guide plate transmission side is S ds60 = L ds60 + L c The PLC records this distance;

[0028] S8: Rotate the lever counterclockwise by 60 degrees. o The PLC reads the laser rangefinder value at this time. L os60 At this point, the angular distance from the laser rangefinder to the operating side of the guide plate is... S os60 = L os60 + L c The PLC records this distance;

[0029] S9: Rotate the lever counterclockwise by 60 degrees. o At this moment, the laser rangefinder lens is perpendicular to and oriented towards the operating side guide beam, and the PLC reads the laser rangefinder value. L os0 The distance on the operating side of the calibration guide plate is then... S os0 = L os0 + L c ;

[0030] S10: If S os60 -2 S os0 The absolute value is less than x If the operating side guide plate is parallel to the rolling center line, it is considered to be in good condition. S ds60 -2 S ds0 The absolute value is less than x, it is determined that the drive-side guide plate is parallel to the rolling center line and in good condition; if the absolute value of the difference on one side is greater than or equal to x , an alarm for out-of-synchronization of the inlet and outlet of the guide plate beam on one side is issued. x The parameter selection is set according to process requirements.

[0031] S11: After determining that the synchronization of both sides is good, the PLC controls both guide plates to open simultaneously by 100 mm.

[0032] S12: The PLC reads the value of the laser rangefinder L os0x , which is the vertical distance from the lens of the laser rangefinder to the operating-side guide plate beam. At this time, the opening degree of the operating side of the guide plate is S os0x = L os0x + L c ;

[0033] S13: Rotate the rotating rod clockwise by 180 degrees, and the laser rangefinder will be exactly perpendicular to the guide plate beam, with the lens facing the drive side.

[0034] S14: The PLC reads the value of the laser rangefinder L ds0x , which is the vertical distance from the lens of the laser rangefinder to the drive-side guide plate beam. At this time, the opening degree of the operating side of the guide plate is S ds0x = L ds0x + L c ;

[0035] S15: If ( S os0 + 100) - S os0x < y , and ( S ds0 + 100) - S ds0x < y, then the mechanical clearances of both guide plates meet the requirements; if ( S os0 + 100) - S os0x > y , or ( S ds0 + 100) - S ds0x > y , an alarm for large mechanical clearance of one side of the guide plate is output. y The parameter selection is set according to process requirements.

[0036] S16: PLC controls the guide plates on both sides to open to the maximum opening position;

[0037] S17: The swing arm servo motor drives the swing arm to rotate in the opposite direction at high speed. o / s, less than 5 o Switch to low speed rotation 1 o / s, rotation angle reaches 0 o Stop rotating at that time;

[0038] S18: The process of calibrating the guide plate, measuring the mechanical clearance of the guide plate, and measuring the horizontal deviation from the rolling center line is completed.

[0039] Compared with the prior art, the beneficial effects of the present invention are:

[0040] This invention provides an automatic calibration and accuracy detection device and method for hot-rolled side guide plates. After implementation, operators can safely, efficiently, and accurately complete the automatic calibration of the opening degree of the hot-rolling line side guide plates with one click. During the process, the size of the mechanical clearance of the guide plate and the parallelism deviation between the guide plate and the rolling center line are measured. No manual intervention is required during the process, which solves the problems of low efficiency, long time consumption, and high operation difficulty of existing manual calibration. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the existing winding guide plate in operation.

[0042] Figure 2 This is a structural diagram of the side guide plate and guide plate calibration device of the present invention;

[0043] Figure 3 This is a structural diagram of the guide plate calibration device of the present invention;

[0044] Figure 4 This is a front view of the guide plate calibration device of the present invention before calibration begins;

[0045] Figure 5 This is a side view of the guide plate calibration device of the present invention before calibration begins;

[0046] Figure 6 This is a side view of the state during the calibration process of the guide plate calibration device of the present invention.

[0047] In the diagram: 1. Laser rangefinder; 2. Rotating rod; 3. Rotating rod support; 4. Rotating rod motor with built-in encoder; 5. Transmission side guide plate; 6. Roller conveyor group; 7. Operation side guide plate; 8. Swing arm servo motor; 9. Base; 10. Swing arm. Detailed Implementation

[0048] The technical solutions of the embodiments 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] Please see Figure 2-6 This invention provides an automatic calibration and accuracy testing device for hot-rolled side guide plates, including a swing arm servo motor 8, a swing arm 10, a rotating rod support 3, a rotating rod 2, a rotating rod motor 4 with a built-in encoder, a laser rangefinder 1, and a base 9. The swing arm servo motor 8 is mounted on the base 9 and is connected to the swing arm 10 on the base 9 via a coupling. It can drive the swing arm 10 to rotate from a vertical position to a horizontal position at the start of calibration and then drive the swing arm 10 back from the horizontal position to the original vertical position after calibration. The device includes a built-in encoder. The rotating rod motor 4 can accurately detect the position of the swing arm 10 at any time; the other end of the swing arm 10 is equipped with a rotating rod support 3, and the rotating rod support 3 is equipped with a rotating rod motor 4 with a built-in encoder and a rotating rod 2. The rotating rod 2 is connected to the rotating rod motor 4 with a built-in encoder; a laser rangefinder 1 is installed at the lower end of the rotating rod 2, which can accurately measure the distance from the object to the lens; the base 9 is located outside the operating side guide plate 7, and a transmission side guide plate 5 is provided corresponding to the operating side guide plate 7. A roller conveyor group 6 is provided between the transmission side guide plate 5 and the operating side guide plate 7.

[0050] In this embodiment of the invention, the swing arm 10 is a fork-shaped hollow strip structure driven by the swing arm servo motor 8. One end of the swing arm 10 is mounted on the base 9 through two trunnions, and one side of the trunnion is connected to the swing arm servo motor 8 through a coupling. Under the drive of the swing arm servo motor 8, it rotates within a 90° working range with the trunnion as the pivot. Designing the swing arm 10 as a fork-shaped hollow structure can reduce the weight of the swing arm 10 and provide storage space for the rotating rod 2.

[0051] In this embodiment of the invention, the rotating rod support 3 is cylindrical and is mounted on the fork-shaped swing arm 10 via trunnions on both sides. The trunnions of the rotating rod support 3 and the swing arm 10 are connected by rolling bearings. Therefore, the rotating rod support 3 can rotate freely on the swing arm 10 around its own trunnion axis.

[0052] In this embodiment of the invention, the rotating rod 2 is vertically installed inside the rotating rod support 3 and is engaged with the rotating rod support 3 through a thrust bearing. It can rotate freely around its own axis. At the same time, the rotating rod 2 can swing freely with the rotating rod support 3 at the end of the swing arm 10. The angle formed with the swing arm 10 can change continuously. Under the action of gravity, the rotating rod 2 always remains vertical. When the swing arm 10 is in the original vertical position, the rotating rod 2 is parallel to the swing arm 10 and is located between the forks of the swing arm 10. During the process of the swing arm 10 turning from vertical to horizontal, the rotating rod 2 still remains perpendicular to the horizontal plane. When the swing arm 10 reaches the horizontal position, the rotating rod 2 is perpendicular to the swing arm 10.

[0053] In this embodiment of the invention, the rotary rod motor 4 with built-in encoder is fixedly mounted on the rotary rod support 3 and connected to the rotary rod 2 through a miniature coupling to drive the rotary rod 2 to rotate. The rotation angle is accurately measured by the motor encoder.

[0054] In this embodiment of the invention, when the swing arm 10 swings down to the horizontal position, the central axis of the rotating rod 2 intersects perpendicularly with the center line of the roller group 6, and the entire device is in the calibration working position. The rotating rod motor 4 with built-in encoder is used to drive the rotating rod 2 to rotate at low speed in both directions.

[0055] In this embodiment of the invention, the laser rangefinder 1 is connected to the PLC system via a cable. The PLC system converts the 4-20mA signal of the laser rangefinder 1 into millimeter units through a current signal acquisition template.

[0056] To further explain the embodiments of the present invention, an automatic calibration and accuracy detection method for hot-rolled side guide plates is also provided. First, the manufacturing of the automatic calibration and accuracy detection device for hot-rolled side guide plates and the compilation of the PLC program are completed off-line. The power line and signal line are pre-positioned at the installation location. On maintenance days, the entire device can be installed, wired, and debugged. It can then be put into normal use when side guide plate calibration is required. The specific steps are as follows:

[0057] S1: Set an automatic calibration button on the main control console HMI, edit the PLC program, and implement the button function;

[0058] S2: After the operator presses the button, the automatic calibration control process is activated. Before calibration begins, the two guide plates are in any position, the swing arm 10 is in a position perpendicular to the horizontal plane, the laser rangefinder 1 is perpendicular to the guide plate, and the lens is facing the transmission side.

[0059] S3: After calibration begins, first open both guide plates to their maximum opening position. The method for determining whether they are opened to the maximum position is the stroke of the hydraulic cylinder. S 1 ≤5mm, which means it is close to complete retraction;

[0060] S4: Define the angle of the swing arm 10 when it is in its original vertical position as 0. o The angle after being completely horizontal is 90 degrees. o When the opening on both sides of the guide plate reaches its maximum position, the swing arm servo motor 8 drives the swing arm 10 to rotate at high speed in the forward direction. o / s, angle exceeding 85 o Then switch to low speed rotation 1 o / s, rotation distance reaches 90 o When the rotation stops, the swing arm 10 is in a horizontal position, and the rotating rod 2 is perpendicular to the center of the roller conveyor group 6 due to gravity;

[0061] S5: Laser rangefinder 1 is currently perpendicular to the guide beam, with the lens pointing towards the transmission side. The angle at this point is defined as 0°. o The distance from the lens of laser rangefinder 1 to the center point of the rotating rod is defined as... L c The guide plates on both sides are moved inward by 400mm from their maximum opening position.

[0062] S6: PLC reads the value from laser rangefinder 1 L ds0 , where is the vertical distance from the lens of laser rangefinder 1 to the beam of the transmission-side guide plate 5. At this time, the opening degree of the transmission side of the guide plate is . S ds0 = L ds0 + L c The PLC calibrates the opening degree of the current transmission side guide plate 5 as follows: S ds0 ;

[0063] S7: Rotate the lever counterclockwise by 260 degrees. o The PLC reads the value of laser rangefinder 1 at this time. L ds60 The angular distance from laser rangefinder 1 to the guide plate transmission side is S ds60 = L ds60 + L c The PLC records this distance;

[0064] S8: Rotate the lever counterclockwise by 260 degrees. o The PLC reads the value of laser rangefinder 1 at this time. L os60 At this time, the angular distance from laser rangefinder 1 to the operating side of the guide plate is... S os60 = L os60 + L cThe PLC records this distance;

[0065] S9: Rotate the lever counterclockwise by 260 degrees. o At this moment, the lens of laser rangefinder 1 is perpendicular to and oriented towards the operating side guide plate 7 beam, and the PLC reads the value of laser rangefinder 1. L os0 The distance on the operating side of the calibration guide plate is then... S os0 = L os0 + L c ;

[0066] S10: If S os60 -2 S os0 The absolute value is less than x If the operating side guide plate 7 is parallel to the rolling center line, it is considered to be in good condition. S ds60 -2 S ds0 The absolute value is less than x If the transmission side guide plate 5 is parallel to the rolling center line, it is considered to be in good condition; if the absolute value of the difference on one side is greater than or equal to... x If the inlet and outlet of a certain side guide beam are out of sync, an alarm will be issued. x Parameter selection is set according to process requirements;

[0067] S11: After determining that the synchronization between the two sides is good, the PLC controls the guide plates on both sides to open by 100mm at the same time.

[0068] S12: PLC reads the value from laser rangefinder 1 L os0x , where is the vertical distance from the lens of laser rangefinder 1 to the beam of the operating side guide plate 7. At this time, the opening degree of the operating side of the guide plate is . S os0x = L os0x + L c ;

[0069] S13: Rotate the rotating rod 2 clockwise by 180 degrees, and the laser rangefinder 1 will be exactly perpendicular to the guide beam, with the lens facing the transmission side;

[0070] S14: PLC reads the value from laser rangefinder 1 L ds0x , where is the vertical distance from the lens of laser rangefinder 1 to the beam of the transmission-side guide plate 5. At this time, the opening degree of the operating side of the guide plate is . S ds0x = L ds0x+ L c ;

[0071] S15: If ( S os0 + 100)- S os0x < y , and ( S ds0 + 100)- S ds0x < y, then the mechanical clearances of the side guides meet the requirements; if ( S os0 + 100)- S os0x > y , or ( S ds0 + 100)- S ds0x > y , then output an alarm for large mechanical clearance of a certain side guide, y The parameter selection is set according to the process requirements;

[0072] S16: The PLC controls the side guides to open to the maximum opening position;

[0073] S17: The swing arm servo motor 8 drives the swing arm 10 to rotate in the reverse direction at a high speed of 5 o / s, and when it is less than 5 o it changes to rotate at a low speed of 1 o / s, and stops rotating when the rotation angle reaches 0 o ;

[0074] S18: The processes of calibrating the guides, measuring the mechanical clearances of the guides, and measuring the horizontal deviation from the rolling center line are completed.

[0075] In summary: An automatic calibration and precision detection device and method for hot rolling side guides provided by the present invention enable operators to automatically calibrate the opening of the hot rolling line side guides safely, efficiently, and accurately with one key, and measure the mechanical clearances of the guides and the parallelism deviation between the guides and the rolling center line during the process, without manual intervention during the process, solving the problems of low efficiency, long time consumption, and high operation difficulty existing in the existing manual calibration.

[0076] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. An automatic calibration and accuracy testing device for hot-rolled side guide plates, characterized in that: The system includes a swing arm servo motor (8), a swing arm (10), a rotating rod support (3), a rotating rod (2), a rotating rod motor (4) with a built-in encoder, a laser rangefinder (1), and a base (9). The swing arm servo motor (8) is mounted on the base (9), and the swing arm servo motor (8) is connected to the swing arm (10) on the base (9) via a coupling. The other end of the swing arm (10) is mounted on the rotating rod support (3). The rotating rod motor (4) with a built-in encoder and the rotating rod (2) are mounted on the rotating rod support (3). The rotating rod (2) is connected to the rotating rod motor (4) with a built-in encoder. 4) Transmission connection; a laser rangefinder (1) is installed at the lower end of the rotating rod (2); the base (9) is located outside the operating side guide plate (7), and a transmission side guide plate (5) is provided corresponding to the operating side guide plate (7). A roller conveyor group (6) is provided between the transmission side guide plate (5) and the operating side guide plate (7); when the swing arm (10) swings down to the horizontal position, the central axis of the rotating rod (2) intersects perpendicularly with the center line of the roller conveyor group (6), and the whole device is in the calibration working position. The rotating rod motor (4) with built-in encoder is used to drive the rotating rod (2) to rotate at low speed in both directions.

2. The automatic calibration and accuracy testing device for hot-rolled side guide plates as described in claim 1, characterized in that: The swing arm (10) is a fork-shaped hollow strip structure driven by a swing arm servo motor (8). One end of the swing arm (10) is mounted on the base (9) through two trunnions, and one side of the trunnion is connected to the swing arm servo motor (8) through a coupling. Under the drive of the swing arm servo motor (8), it rotates within a 90° working range with the trunnion as the pivot.

3. The automatic calibration and accuracy detection device for hot-rolled side guide plates as described in claim 2, characterized in that: The rotating rod support (3) is cylindrical. The rotating rod support (3) is mounted on the fork-shaped swing arm (10) through trunnions on both sides. The trunnions of the rotating rod support (3) and the swing arm (10) are connected by rolling bearings.

4. The automatic calibration and accuracy detection device for hot-rolled side guide plates as described in claim 1, characterized in that: The rotating rod (2) is vertically installed inside the rotating rod support (3) and is connected to the rotating rod support (3) by a thrust bearing.

5. The automatic calibration and accuracy detection device for hot-rolled side guide plates as described in claim 1, characterized in that: The rotary rod motor (4) with built-in encoder is fixedly installed on the rotary rod support (3) and connected to the rotary rod (2) through a miniature coupling.

6. The automatic calibration and accuracy detection device for hot-rolled side guide plates as described in claim 1, characterized in that: The laser rangefinder (1) is connected to the PLC system via a cable. The PLC system converts the 4-20mA signal of the laser rangefinder (1) into millimeter units through a current signal acquisition template.

7. A method for automatic calibration and accuracy testing of hot-rolled side guide plates, comprising the automatic calibration and accuracy testing device for hot-rolled side guide plates as described in any one of claims 1-6, characterized in that: The specific steps are as follows: S1: Set an automatic calibration button on the main control console HMI, edit the PLC program, and implement the button function; S2: After the operator presses the button, the automatic calibration control process is activated. Before the calibration starts, the two guide plates are in any position, the swing arm (10) is in a position perpendicular to the horizontal plane, the laser rangefinder (1) is perpendicular to the guide plate, and the lens is facing the transmission side. S3: After calibration begins, first open both guide plates to their maximum opening position. The method for determining whether they are opened to the maximum position is the stroke of the hydraulic cylinder. S 1 ≤5mm, which means it is close to complete retraction; S4: Define the angle of the swing arm (10) when it is in the vertical original position as 0. o The angle after being completely horizontal is 90 degrees. o When the opening on both sides of the guide plate reaches its maximum position, the swing arm servo motor (8) drives the swing arm (10) to rotate in the forward high speed for 5 seconds. o / s, angle exceeding 85 o Then switch to low speed rotation 1 o / s, rotation distance reaches 90 o When the rotation stops, the swing arm (10) is in a horizontal state, and the rotating rod (2) is perpendicular to the center of the roller conveyor group (6) due to gravity; S5: Laser rangefinder (1) is currently perpendicular to the guide beam, with the lens facing the transmission side. The angle at this time is defined as 0. o The distance from the lens of the laser rangefinder (1) to the center point of the rotating rod is defined as... L c The guide plates on both sides are moved inward by 400mm from their maximum opening position. S6: PLC reads the laser rangefinder (1) value L ds0 , is the vertical distance from the lens of the laser rangefinder (1) to the beam of the transmission side guide plate (5). At this time, the opening degree of the transmission side of the guide plate is . S ds0 = L ds0 + L c The PLC calibrates the opening degree of the current transmission side guide plate (5) as follows: S ds0 ; S7: Rotate the rotating rod counterclockwise (2) 60 o The PLC reads the value of the laser rangefinder (1) at this time. L ds60 The angular distance from the laser rangefinder (1) to the guide plate transmission side is S ds60 = L ds60 + L c The PLC records this distance; S8: Rotate the lever counterclockwise again (2) 60 o The PLC reads the value of the laser rangefinder (1) at this time. L os60 At this time, the angular distance from the laser rangefinder (1) to the operating side of the guide plate is... S os60 = L os60 + L c The PLC records this distance; S9: Rotate the lever counterclockwise again (2) 60 o At this time, the lens of the laser rangefinder (1) is perpendicular to and facing the beam of the operating side guide plate (7), and the PLC reads the value of the laser rangefinder (1) at this time. L os0 The distance on the operating side of the calibration guide plate is then... S os0 = L os0 + L c ; S10: If S os60 -2 S os0 The absolute value is less than x If the operating side guide plate (7) is parallel to the rolling center line, it is in good condition. S ds60 -2 S ds0 The absolute value is less than x If the transmission side guide plate (5) is parallel to the rolling center line, it is in good condition; if the absolute value of the difference on one side is greater than or equal to x If the inlet and outlet of a certain side guide beam are out of sync, an alarm will be issued. x Parameter selection is set according to process requirements; S11: After determining that the synchronization between the two sides is good, the PLC controls the guide plates on both sides to open by 100mm at the same time. S12: PLC reads the value of laser rangefinder (1) L os0x , is the vertical distance from the lens of the laser rangefinder (1) to the beam of the operating side guide plate (7). At this time, the opening degree of the operating side of the guide plate is . S os0x = L os0x + L c ; S13: Rotate the rotating rod (2) 180 degrees clockwise, and the laser rangefinder (1) will be perpendicular to the guide beam, with the lens facing the transmission side; S14: PLC reads the laser rangefinder (1) value L ds0x , is the vertical distance from the lens of the laser rangefinder (1) to the beam of the transmission side guide plate (5). At this time, the opening degree of the operating side of the guide plate is . S ds0x = L ds0x + L c ; S15: If ( S os0 + 100) - S os0x < y , and ( S ds0 + 100) - S ds0x < y, then the mechanical clearances of the two side guide plates meet the requirements; If ( S os0 + 100) - S os0x > y , or ( S ds0 + 100) - S ds0x > y , then output an alarm for large mechanical clearance of a certain side guide plate, y The parameter selection is set according to process requirements; S16: PLC controls the guide plates on both sides to open to the maximum opening position; S17: The swing arm servo motor (8) drives the swing arm (10) to rotate in the opposite direction at high speed for 5 seconds. o / s, less than 5 o Switch to low speed rotation 1 o / s, rotation angle reaches 0 o Stop rotating at that time; S18: The process of calibrating the guide plate, measuring the mechanical clearance of the guide plate, and measuring the horizontal deviation from the rolling center line is completed.

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