A method and system for shear control of irregular head of a steel sheet

Abstract

This invention belongs to the field of steel plate head shearing technology, specifically relating to a shearing control method and control system for irregular steel plate heads. The method includes: as the steel plate is conveyed, the moving distance of the steel plate is acquired in real time from the top of the irregular head, and simultaneously, a contour image of the steel plate head is acquired in real time; based on the contour image, the angle α between the line connecting the contour edges of two adjacent frames of the contour image and the length direction of the steel plate is acquired; if several consecutive α values ​​are less than a threshold, the shearing position is determined; based on the shearing position and the total number of frames of the corresponding contour image and the corresponding moving distance, the length of the irregular head of the steel plate is further acquired; based on this length, shearing is performed after the irregular head of the steel plate moves to the shearing position of the shearing device. This invention can improve the shearing efficiency and accuracy of the production line, reduce the labor intensity of operators, and reduce shearing deviations caused by operation.

Description

Technical Field

[0001] This invention belongs to the field of steel plate head shearing technology, specifically relating to a shearing control method and shearing control system for irregular heads of steel plates. Background Technology

[0002] The production process of medium and heavy plates generally consists of several main steps, including heating, rolling, and shearing. During the rolling process, the steel plate will develop irregular shapes at the head, such as... Figure 1 As shown, for products delivered in fixed lengths, the irregular portions at the head of the steel plate generally need to be removed. The length and shape of these irregular portions are influenced by many factors during the rolling process, and are generally inconsistent across each steel plate. In previous production processes, head removal was typically done by operators visually estimating and manually adjusting the cutting position.

[0003] This operating method has several drawbacks: 1. It is entirely manual, requiring each steel plate to be processed individually in an assembly line operation, resulting in a large workload and increased labor intensity for operators; 2. Manual adjustment of the shearing position sometimes fails to achieve the correct position in one go, necessitating repeated adjustments of the roller conveyor, which affects adjustment time and wastes energy; 3. Operators typically adjust remotely from a control room via camera, which is affected by factors such as personal experience and camera network latency, making precise positioning difficult. Insufficient head removal necessitates a second cut, while excessive removal leads to waste.

[0004] Therefore, in this field, how to achieve automatic detection and shearing of irregular head lengths of steel plates through effective means and methods is of great significance for improving production efficiency and shearing accuracy. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies in achieving precise shearing of irregular steel plate heads, and to provide a shearing control method and control system for irregular steel plate heads. This method can improve the shearing efficiency and accuracy of the production line, reduce the labor intensity of operators, and reduce shearing deviations caused by operation.

[0006] To achieve the above objectives, in a first aspect, the present invention provides a method for controlling the shearing of irregular heads of steel plates, comprising:

[0007] As the steel plate is conveyed, the moving distance of the steel plate is acquired in real time, starting from the top of the irregular head of the steel plate, and the contour image of the head of the steel plate is acquired in real time at the same time; each frame of the contour image corresponds to a moving distance.

[0008] Based on the contour image, the angle α between the line connecting the contour edges of two adjacent contour images and the length direction of the steel plate is obtained respectively.

[0009] Along the length of the steel plate, as the steel plate is conveyed, if several consecutive α values ​​are less than the threshold, then the corresponding position of the steel plate is the shearing position of the irregular head of the steel plate.

[0010] Based on the shearing position and the total number of frames of its corresponding contour image and the corresponding moving distance, the length of the irregular head of the steel plate is further obtained.

[0011] Based on the length of the irregular head, shearing is performed after the irregular head of the steel plate moves to the shearing position of the shearing device.

[0012] In some preferred embodiments, obtaining the angle α between the line connecting the contour edges of two adjacent contour images and the length direction of the steel plate based on the contour image includes:

[0013] Based on several frames of contour images acquired in real time, the overall image of the irregular head of the steel plate is obtained.

[0014] Based on the overall image, obtain the contour edge connection line between two adjacent contour images in the overall image;

[0015] Based on the line connecting the edges of the contour, obtain the angle α between it and the length direction of the steel plate.

[0016] In some preferred embodiments, the moving distance is 0.3-0.8 mm, the plurality of α is 3-6 α, and the corresponding threshold is -5° to 5°.

[0017] In some preferred embodiments, the step of further obtaining the length of the irregular head of the steel plate based on the shearing position and the total number of frames of its corresponding contour image and the corresponding moving distance includes:

[0018] As the steel plate is conveyed, the total forward distance S of the steel plate is obtained, the total number of pulses W detected by the encoder during the forward movement of the steel plate, the number of pulses w corresponding to one revolution of the conveyor roller, and the circumference s of a single roller of the conveyor roller are obtained simultaneously.

[0019] Based on the aforementioned S, W, w, and s, the slippage factor β is further obtained;

[0020] Based on the slippage factor β and the total number of frames N of the contour image corresponding to the shearing position and the corresponding moving distance S1, the length L1 of the irregular head of the steel plate is obtained.

[0021] More preferably, β = S / (W×s / w).

[0022] More preferably, L1 = N × S1 × β.

[0023] In some preferred embodiments, the step of shearing the steel plate after the irregular head has moved to the shearing position of the shearing device, based on the length of the irregular head, includes:

[0024] The monitoring distance between the monitoring location and the shearing position of the shearing device is obtained in advance;

[0025] Based on the monitoring distance and the length of the irregular head, the shearing distance that the steel plate needs to move to reach the shearing position after reaching the monitoring position is obtained.

[0026] From the moment the steel plate reaches the monitoring position, after the steel plate moves the shearing distance again, the irregular head of the steel plate is sheared at the shearing position.

[0027] In some preferred embodiments, obtaining the shearing distance required for the steel plate to move to the shearing position after reaching the monitoring position, based on the monitoring distance and the length of the irregular head, further includes:

[0028] Obtain the correction distance value when abnormal situations occur during the movement of the steel plate;

[0029] Based on the corrected distance value, the monitoring distance, and the length of the irregular head, the shearing distance that the steel plate needs to move to reach the shearing position after reaching the monitoring position is obtained.

[0030] Secondly, the present invention provides a shearing control system for irregular heads of steel plates, comprising:

[0031] A shearing device having a shearing position for shearing irregular heads of steel plates;

[0032] The conveyor rollers, with their transport direction facing the shearing device, are used to transport the irregular head of the steel plate from the shearing position to the shearing position.

[0033] A laser light curtain is installed between the shearing device and the conveyor rollers to monitor whether the steel plate has reached the monitoring position;

[0034] A profile measuring instrument is set between the laser light curtain and the conveyor roller, and its height is higher than that of the conveyor roller. It is used to continuously photograph the profile of the steel plate to further obtain the length of the irregular head of the steel plate.

[0035] An encoder, located below and electrically connected to the contour measuring instrument and fixed on the conveyor roller, is clock-synchronized with the contour measuring instrument to detect the moving distance of the steel plate each time a contour image is captured and to obtain the number of pulses in real time.

[0036] The PLC control system is electrically connected to the shearing device, conveyor rollers, laser light curtain, contour measuring instrument, and encoder, and executes the shearing control method as described in the first aspect.

[0037] In some preferred embodiments, there are multiple contour measuring instruments arranged at intervals along the width of the steel plate, used to photograph the overall contour of the irregular head of the steel plate to obtain an overall contour image of the irregular head of the steel plate.

[0038] This invention, by employing a single frame of contour image corresponding to a specific moving distance, enables shooting over short or extremely short moving distances. Furthermore, it specifically uses the angle α between the line connecting the contour edges of two adjacent frames and the length direction of the steel plate as a crucial basis for subsequent length measurement of irregular heads. This allows for precise identification of the boundary between irregular heads and regular areas of the steel plate, thereby achieving accurate automatic cropping. This invention also offers the following advantages:

[0039] 1) This invention can automatically and accurately measure the length of irregular heads of steel plates and automatically transport the steel plates to the shearing position of the shearing device, thereby improving the shearing accuracy of irregular heads, reducing the scrap removed during shearing, increasing the yield, and generating better economic benefits.

[0040] 2) This invention can detect the length of irregular heads of steel plates online, which can avoid the operator from manually positioning the steel plate back and forth repeatedly to move it to the accurate position if the positioning is inaccurate. This reduces the number of movements, improves positioning and production efficiency, and reduces the power consumption of the process.

[0041] 3) After measuring the length of the irregular head of the steel plate, it is easy to achieve automatic positioning and automatic cutting, which can greatly reduce the amount of work for operators and reduce the intensity of manual labor.

[0042] In summary, this invention can improve the shearing efficiency and accuracy of the production line, while reducing the labor intensity of operators and the shearing deviation caused by operation.

[0043] In a preferred embodiment, the present invention considers and determines a slippage factor to address potential slippage situations and correlates it with the length of the irregular head of the steel plate, which facilitates more accurate measurement of the length of the irregular head of the steel plate, thereby enabling more precise automatic shearing. Attached Figure Description

[0044] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a picture of the actual shape of the head of the rolled steel plate.

[0046] Figure 2 This is a front view of a specific embodiment of the shearing control system of the present invention.

[0047] Figure 3 This is a schematic diagram of the process of measuring the irregular head of a steel plate using a contour measuring instrument.

[0048] Figure 4 This is a feedback graph showing the measurement results of the profile measuring instrument on the length of the irregular head of the steel plate.

[0049] Figure 5 This is a top view of a specific embodiment of the shearing control system of the present invention.

[0050] Explanation of reference numerals in the attached figures

[0051] 1. Steel plate, 2. Conveyor roller, 3. Contour measuring instrument, 4. Encoder, 5. Laser light curtain, 6. Shearing device. Detailed Implementation

[0052] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0053] In a first aspect, the present invention provides a method for controlling the shearing of irregular heads of steel plates, comprising:

[0054] As the steel plate is conveyed, the moving distance of the steel plate is acquired in real time, starting from the top of the irregular head of the steel plate, and the contour image of the head of the steel plate is acquired in real time at the same time; each frame of the contour image corresponds to a moving distance.

[0055] Based on the contour image, the angle α between the line connecting the contour edges of two adjacent contour images and the length direction of the steel plate is obtained respectively.

[0056] Along the length of the steel plate, as the steel plate is conveyed, if several consecutive α values ​​are less than the threshold, then the corresponding position of the steel plate is the shearing position of the irregular head of the steel plate.

[0057] Based on the shearing position and the total number of frames of its corresponding contour image and the corresponding moving distance, the length of the irregular head of the steel plate is further obtained.

[0058] Based on the length of the irregular head, shearing is performed after the irregular head of the steel plate moves to the shearing position of the shearing device.

[0059] It should be understood that, as the steel plate is conveyed, the moving distance of the steel plate is acquired in real time from the top of the irregular head of the steel plate, and the contour image of the head of the steel plate is acquired in real time at the same time. This means that multiple frames of contour images of the head of the steel plate are continuously acquired in real time from the top of the irregular head of the steel plate, and multiple moving distances of the steel plate are acquired at the same time. Each frame of contour image corresponds to a moving distance. The moving distances corresponding to different contour images can be the same or different, preferably the same.

[0060] In a preferred embodiment, it can be first detected whether the top of the irregular head of the steel plate has reached the location for acquiring the contour image. If it has, the acquisition of the contour image and the acquisition of the moving distance are initiated.

[0061] In some preferred embodiments, the step of obtaining the angle α between the line connecting the contour edges of two adjacent contour images and the length direction of the steel plate based on the contour image includes: obtaining an overall image of the irregular head of the steel plate based on several frames of contour images acquired in real time; obtaining the line connecting the contour edges of two adjacent contour images in the overall image based on the overall image; and obtaining the angle α between the line connecting the contour edges and the length direction of the steel plate based on the line connecting the contour edges.

[0062] In this invention, the phrase "a number of consecutively acquired α values ​​all less than a threshold" refers to a predetermined number of α values ​​all being less than a preset threshold. Those skilled in the art can select the number of consecutively acquired α values ​​and an appropriate threshold value based on actual circumstances to determine the boundary between the irregular head and the regular area of ​​the steel plate. It is understood that the "a number of consecutively acquired α values" refers to multiple α values ​​acquired consecutively along the length direction of the steel plate.

[0063] In some preferred embodiments, the moving distance is 0.3-0.8 mm, the plurality of α is 3-6 α, and the corresponding threshold is -5° to 5°.

[0064] In some preferred embodiments, the step of further obtaining the length of the irregular head of the steel plate based on the shearing position and the total number of frames of its corresponding contour image and the corresponding moving distance includes:

[0065] As the steel plate is conveyed, the total forward distance S of the steel plate is obtained, the total number of pulses W detected by the encoder during the forward movement of the steel plate, the number of pulses w corresponding to one revolution of the conveyor roller, and the circumference s of a single roller of the conveyor roller are obtained simultaneously.

[0066] Based on the aforementioned S, W, w, and s, the slippage factor β is further obtained;

[0067] Based on the slippage factor β, the total number of frames N of the contour image corresponding to the shearing position, and the corresponding moving distance S1, the length L1 of the irregular head of the steel plate is obtained. In this preferred embodiment, the slippage of the steel plate during the conveyor roller transport process is fully considered, and it is correlated with the length L1 of the irregular head to achieve accurate measurement.

[0068] More preferably, β = S / (W×s / w).

[0069] More preferably, L1 = N × S1 × β.

[0070] In some preferred embodiments, the step of shearing the steel plate after the irregular head moves to the shearing position of the shearing device based on the length of the irregular head includes: pre-obtaining the monitoring distance between the monitoring position and the shearing position of the shearing device; obtaining the shearing distance that the steel plate needs to move to reach the shearing position after reaching the monitoring position based on the monitoring distance and the length of the irregular head; and shearing the irregular head of the steel plate at the shearing position after the steel plate moves the shearing distance from the monitoring position.

[0071] It is understandable that the monitoring position is used to monitor whether the head of the steel plate has reached the designated position, so as to provide a starting point for subsequent automatic shearing measurement.

[0072] It is understood that the shearing distance is the sum of the length of the irregular head of the steel plate and the monitoring distance.

[0073] In some preferred embodiments, the step of obtaining the shearing distance required for the steel plate to move to the shearing position after reaching the monitoring position based on the monitoring distance and the length of the irregular head further includes: obtaining a correction distance value when an abnormal situation occurs during the movement of the steel plate; and obtaining the shearing distance required for the steel plate to move to the shearing position after reaching the monitoring position based on the correction distance value, the monitoring distance, and the length of the irregular head.

[0074] It is understood that the shearing distance is the sum of the length of the irregular head of the steel plate and the monitoring distance and correction distance values.

[0075] Those skilled in the art can determine the correction distance value based on the impact of abnormal conditions on the total forward distance S of the conveyed steel plate; when there are no abnormal conditions, the correction distance value is 0.

[0076] Secondly, the present invention provides a shearing control system for irregular heads of steel plates, comprising:

[0077] A shearing device having a shearing position for shearing irregular heads of steel plates;

[0078] The conveyor rollers, with their transport direction facing the shearing device, are used to transport the irregular head of the steel plate from the shearing position to the shearing position.

[0079] A laser light curtain is installed between the shearing device and the conveyor rollers to monitor whether the steel plate has reached the monitoring position and to provide a starting point measurement position for subsequent automatic shearing measurement.

[0080] A profile measuring instrument is set between the laser light curtain and the conveyor roller, and its height is higher than that of the conveyor roller. It is used to continuously photograph the profile of the steel plate to further obtain the length of the irregular head of the steel plate.

[0081] An encoder, located below and electrically connected to the contour measuring instrument and fixed on the conveyor roller, is clock-synchronized with the contour measuring instrument to detect the moving distance of the steel plate each time a contour image is captured and to obtain the number of pulses in real time; it can be understood that it also obtains the total forward distance S.

[0082] The PLC control system is electrically connected to the shearing device, conveyor rollers, laser light curtain, contour measuring instrument, and encoder, and executes the shearing control method as described in the first aspect.

[0083] Understandably, the profile measuring instrument is located on one side of the conveyor roller conveyor.

[0084] This invention uses an encoder and a contour measuring instrument to measure the length of the irregular head of a steel plate passing through a certain area. After the PLC control system acquires the length of the irregular head, it initiates automatic head positioning when the steel plate head reaches the laser light curtain position. (Since the length of the irregular head is known, after reaching the monitoring position, the steel plate can move a definite distance to achieve precise automatic shearing.) Specifically, when the top of the steel plate head (i.e., the leading edge position in the length direction) exceeds the shearing position by a distance exactly equal to the measured length of the irregular head, it indicates that the shearing position has been reached and the shearing conditions are met. At this point, the shearing function in the PLC control system is triggered (or manually confirmed). The PLC control system then controls the shearing device to perform the shearing, thus completing the automatic shearing of the irregular head of the steel plate.

[0085] It is understood that the present invention controls the shutter time of the profile measuring instrument camera by using the moving speed fed back by the encoder to achieve the capture of a moving distance corresponding to each frame of profile image.

[0086] In this invention, the encoder is preferably a rotary encoder. The profile measuring instrument is preferably an infrared profile measuring instrument (e.g., a high-speed line-frame camera), which uses the infrared imaging principle to measure the edge position of the steel plate, obtain the real-time width, profile, and included angle α, and further calculate the length of the irregular head of the steel plate. The profile measuring instrument performs rapid continuous shooting at a preset time (generally the time corresponding to the steel plate conveying distance), and the continuous profile images are as follows: Figure 3 As shown, the length of the irregular head of the steel plate generally does not exceed 1 meter.

[0087] In some preferred embodiments, there are multiple contour measuring instruments, such as... Figure 2 As shown, the probes are arranged at intervals along the width of the steel plate to capture the overall contour of the irregular head of the steel plate, thereby obtaining an image of the overall contour of the irregular head of the steel plate. This preferred solution can accommodate situations where the width of the steel plate exceeds the field of view of a single probe measuring instrument. The contour images captured by multiple probe measuring instruments are stitched together to form the overall contour of the irregular head of the steel plate, thus achieving contour measurement.

[0088] It is understood that the laser light curtain has a light curtain transmitter and a receiver. The structures of the shearing device, conveyor roller, laser light curtain, contour measuring instrument, and encoder of this invention can all adopt existing instrument structures, as long as they can achieve the aforementioned corresponding functions.

[0089] Those skilled in the art can set up multiple operable functional modules in the PLC control system according to actual needs. For example, the "automatic shearing" button can be used to realize automatic positioning and shearing after the length of the irregular head is determined, and the "automatic calculation" button can be used to calculate the shearing distance, etc., thereby realizing one-button control of automated control.

[0090] In some specific embodiments of the present invention, such as Figures 2-4 In the shear control system shown, the following shear control method is implemented:

[0091] (1) Steel plate 1 moves towards shearing device 6 on conveyor roller 2. When profile measuring instrument 3 detects that steel plate 1 has reached the field of view of profile measuring instrument 3, profile measuring instrument 3 and encoder 4 start synchronously. When encoder 4 detects that conveyor roller 2 has moved 0.5mm (in normal transportation, 0.5mm movement of conveyor roller 2 means that steel plate 1 has moved forward 0.5mm, that is, the moving distance is 0.5mm), profile measuring instrument 3 takes one picture. With the continuous conveying of steel plate 1, profile measuring instrument 3 takes 2000 effective pictures continuously. Then the captured profile images are stitched together to form a complete profile. Figure 3The image shown demonstrates high-precision measurement at 0.5mm intervals (i.e., each moving distance), thereby obtaining a complete contour image of the irregular head of the steel plate 1. The contour measuring instrument 3 then calculates the angle α (or edge slope) between the line connecting the width edges of the steel plate 1 captured in each frame of the contour image and the length direction of the steel plate 1. Figure 3 As shown. When three consecutive α values ​​are all less than the threshold (-5° to 5°), the boundary point between the regular area and the irregular head of steel plate 1 is determined, and the length of the irregular head of steel plate 1 is considered to have been measured. The length measurement result is shown in the figure. Figure 4 As shown. It is understandable that when the contour measuring instrument 3 and encoder 4 start up and measure the length of the irregular head of the steel plate 1, the steel plate 1 continues to move towards the shearing position.

[0092] (2) Figure 5 As shown, steel plate 1 moves along the path before reaching the monitoring position or the shearing position. Figure 5 The steel plate 1 moves in the direction of the middle arrow towards the shearing device 6. Before the steel plate 1 reaches the monitoring position of the laser light curtain 5, the length of the irregular head is transmitted to the PLC control system for the shearing process. When the laser light curtain 5 detects the top of the head of the steel plate 1 (i.e., the leading edge position of the head in the length direction of the steel plate 1), the steel plate 1 can be precisely sheared and positioned. That is, the distance that the steel plate 1 moves forward is: the length of the irregular head of the steel plate 1 L1 + the monitoring distance between the laser light curtain 5 and the shearing position L2 + the correction distance value (in actual applications, to prevent errors caused by special circumstances, the operator will set a correction value in the program according to the actual situation). This means that the irregular head of the steel plate 1 has reached the shearing position, and then shearing is performed, thus completing the automatic and precise positioning of the irregular head before shearing.

[0093] Understandably, before the steel plate moves onto the shearing device on the conveyor rollers, the center of the steel plate is aligned with the shearing position so that it can be smoothly and accurately sheared when it is transported to the shearing position.

[0094] This invention obtains the length of the irregular head of the steel plate using a contour measuring instrument and an encoder, which can directly guide the PLC control system to perform subsequent automatic shearing. Through automatic measurement and precise control of the irregular head of the steel plate, multiple economic and social benefits are achieved, such as improved shearing efficiency, enhanced accuracy, and increased automation, thereby reducing labor intensity.

[0095] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A method for controlling the shearing of irregular heads of steel plates, characterized in that, include: As the steel plate is conveyed, the moving distance of the steel plate is acquired in real time, starting from the top of the irregular head of the steel plate, and the contour image of the head of the steel plate is acquired in real time at the same time; each frame of the contour image corresponds to a moving distance. Based on the contour image, the angle α between the line connecting the contour edges of two adjacent contour images and the length direction of the steel plate is obtained respectively. Along the length of the steel plate, as the steel plate is conveyed, if several consecutive α values ​​are less than the threshold, then the corresponding position of the steel plate is the shearing position of the irregular head of the steel plate. Based on the shearing position and the total number of frames of its corresponding contour image and the corresponding moving distance, the length of the irregular head of the steel plate is further obtained. Based on the length of the irregular head, shearing is performed after the irregular head of the steel plate moves to the shearing position of the shearing device.

2. The shear control method of claim 1, wherein, The step of obtaining the angle α between the line connecting the contour edges of two adjacent contour images and the length direction of the steel plate based on the contour image includes: Based on several frames of contour images acquired in real time, the overall image of the irregular head of the steel plate is obtained. Based on the overall image, obtain the contour edge connection line between two adjacent contour images in the overall image; Based on the line connecting the edges of the contour, obtain the angle α between it and the length direction of the steel plate.

3. The shear control method of claim 1, wherein, The moving distance is 0.3-0.8 mm, the plurality of α is 3-6 α, and the corresponding threshold is -5° to 5°.

4. The shear control method of claim 1, wherein The length of the irregular head of the steel plate is further obtained based on the total number of frames and the corresponding movement distance of the shearing position and its corresponding contour image, including: As the steel plate is conveyed, the total forward distance S of the steel plate is obtained, the total number of pulses W detected by the encoder during the forward movement of the steel plate, the number of pulses w corresponding to one revolution of the conveyor roller, and the circumference s of a single roller of the conveyor roller are obtained simultaneously. Based on the aforementioned S, W, w, and s, the slippage factor β is further obtained; Based on the slippage factor β and the total number of frames N of the contour image corresponding to the shearing position and the corresponding moving distance S1, the length L1 of the irregular head of the steel plate is obtained.

5. The shear control method of claim 4, wherein, β = S / (W×s / w).

6. The shear control method of claim 4, wherein, L1 = N × S1 × β.

7. The shear control method of claim 1, wherein, The step of shearing the steel plate after the irregular head moves to the shearing position of the shearing device, based on the length of the irregular head, includes: The monitoring distance between the monitoring location and the shearing position of the shearing device is obtained in advance; Based on the monitoring distance and the length of the irregular head, the shearing distance that the steel plate needs to move to reach the shearing position after reaching the monitoring position is obtained. From the moment the steel plate reaches the monitoring position, after the steel plate moves the shearing distance again, the irregular head of the steel plate is sheared at the shearing position.

8. The shear control method of claim 7, wherein, The step of obtaining the shearing distance required for the steel plate to move to the shearing position after reaching the monitoring position based on the monitoring distance and the length of the irregular head further includes: Obtain the correction distance value when abnormal situations occur during the movement of the steel plate; Based on the corrected distance value, the monitoring distance, and the length of the irregular head, the shearing distance that the steel plate needs to move to reach the shearing position after reaching the monitoring position is obtained.

9. A shear control system for irregular heads of steel sheets, characterized by, include: A shearing device having a shearing position for shearing irregular heads of steel plates; The conveyor rollers, with their transport direction facing the shearing device, are used to transport the irregular head of the steel plate from the shearing position to the shearing position. A laser light curtain is installed between the shearing device and the conveyor rollers to monitor whether the steel plate has reached the monitoring position; A profile measuring instrument is set between the laser light curtain and the conveyor roller, and its height is higher than that of the conveyor roller. It is used to continuously photograph the profile of the steel plate to further obtain the length of the irregular head of the steel plate. An encoder, located below and electrically connected to the contour measuring instrument and fixed on the conveyor roller, is clock-synchronized with the contour measuring instrument to detect the moving distance of the steel plate each time a contour image is captured and to obtain the number of pulses in real time. The PLC control system is electrically connected to the shearing device, conveyor rollers, laser light curtain, contour measuring instrument, and encoder, and executes the shearing control method as described in any one of claims 1-8.

10. The shear control system of claim 9, wherein, Multiple contour measuring instruments are arranged at intervals along the width of the steel plate to capture the overall contour of the irregular head of the steel plate, thereby obtaining an overall contour image of the irregular head of the steel plate.

Images