Identification and alarm method and system for width insufficiency of burr plate of shear line

Abstract

The invention discloses a method and a system for identifying and alarming width insufficiency of a rough edge plate on a shearing line of a medium-thickness plate, which are used for identifying and alarming width insufficiency of the rough edge plate before double-side shearing caused by rolling deviation of a rolling line and the like in an occasion without a plane shape detection device or in an occasion in which a steel plate plane shape detection device PSG cannot be used. The method comprises the following steps: 1) carrying out double-side shear shearing setting according to an optimized shearing mathematical model, and judging the state of a steel plate plane shape detection device PSG and the width of a steel plate by using a program module; (2) when the PSG state is confirmed to be unavailable and the burr plate steel plate needs to be subjected to double-side shearing, the process control system L2 sends burr plate contract width data to the electrical basic control system L1, and (3) a magnetic head centering and positioning device is arranged to conduct centering and positioning on the steel plate; (4) arranging a double-side shear laser scriber, enabling the distance between two laser lines to be equal to the contract width of the burr plate, and judging whether the width of the burr plate reaches the standard or not through laser scribing, and (5) giving an alarm in time and performing offline treatment if the width is not enough.

Description

Technical Field

[0001] The present invention relates to a method and system for automatically controlling the production process of a medium and thick plate production line. Specifically, the present invention relates to a method and system for identifying and alarming insufficient width of rough-edged plates on a shearing line. More specifically, the present invention relates to a method and system for identifying and alarming insufficient width of rough-edged plates on a shearing line before double-sided shearing. The method is used for automatically setting double-sided shearing of a shearing line in a medium and thick plate finishing production line when there is no steel plate plane shape detection device or the steel plate plane shape detection device PSG cannot be used. The method identifies and alarms insufficient width of rough-edged plates before double-sided shearing caused by rolling deviation of a rolling line, thereby preventing medium and thick plates with substandard rough-edged plates from being sent to users, thereby improving the efficiency of automatic control of the production process of the medium and thick plate production line and reducing costs. Technical Background

[0002] Patent application number CN202110527605.6, "An Automatic Centering Control Method for a Steel Plate Double-Sided Magnetic Centering Device," provides an automatic centering control method for a steel plate double-sided shearing magnetic centering device. This method first installs a cold metal detector, two laser scribers, and several industrial cameras in the double-sided shearing magnetic centering area of ​​the steel plate. The cameras then take photos of the steel plate and laser line in the double-sided shearing magnetic centering area. The images are then spliced ​​and identified to determine the distance between the steel plate edge and the laser line. This solution focuses on automatic centering control methods and does not consider the detection and alarm of insufficient actual width of rough-edged plates when the steel plate plane shape detection device (PSG) is unavailable.

[0003] Patent application number: CN202221212712.6 "A device for measuring the effective length of medium and thick plates after rolling" uses a measuring mechanism on a set of side mounting plates, namely, with the aid of computer vision technology and laser scribing technology, to first align the steel plate. Then, the laser scribing pen can accurately measure the actual length of the medium and thick plate after rolling, after removing the burrs (arcs) at the head and tail of the steel plate. This solution does not consider the detection and alarm of insufficient width of the rough plate when the steel plate plane shape detection device PSG is unavailable. And because the laser scribing pen accurately measures the actual length of the medium and thick plate after rolling, after removing the burrs (arcs) at the head and tail of the steel plate, it does not involve the determination and alarm of whether the width is insufficient.

[0004] In addition, the actual length is fed back to the rolling mill's presser. If the actual length is insufficient, the presser can increase the actual length of the steel plate by reducing the nominal thickness of the steel plate or narrowing the steel plate width, thus avoiding the problem of insufficient length of medium and thick plates. Therefore, this method measures the steel plate length and does not involve comparing the contract width with the actual width, nor does it involve the detection and alarm of insufficient actual width of the rough plate when the plane shape detection device PSG is unavailable.

[0005] In this way, if the PSG equipment is abandoned, the shape and size of the steel plate cannot be accurately measured; L1 does not know the contract width of the rough edge plate, and does not call the laser detection device to indicate the width according to the contract width, resulting in unqualified products with insufficient width of the rough edge plate before double-sided shearing due to rolling deviation of the rolling line, etc., flowing into the hands of users.

[0006] To this end, all shear setting values ​​of each shearing machine are calculated based on the detected plate shape coordinate data and the steel plate defects detected by the ultrasonic flaw detector UST, combined with an effective shear model algorithm.

[0007] In the past, due to the lack of measured data on steel plate shape, the optimized shearing mathematical model could only rely on theoretical width when setting up double-sided shearing. For the width of the uncut rough-edged plate, there was no way of knowing whether its width met the contract requirements.

[0008] In addition, due to the insufficient width caused by rolling deviation of the rolling line, it is too late to discover the rough edge plate when it reaches the user, making it difficult to meet user requirements.

[0009] To this end, it is necessary to use an intuitive and fully automated method to detect the width of the rough-edged board, and to promptly identify and warn when the width is insufficient so that it can be processed offline and the product qualification rate can be improved. Summary of the Invention

[0010] To overcome the above problems, the present invention provides a method and system for identifying and alarming insufficient width of rough edge plate before double-sided shearing at the shear line during the production of medium and thick plates. The method and system are aimed at:

[0011] The shearing line does not have the steel plate plane shape detection device PSG or the plane shape detection device PSG is unavailable. For the width of the uncut rough edge plate, there is no way to know whether its width meets the contract requirements. In addition, for the situation where the rough edge plate width before double-sided shearing is insufficient due to rolling deviation of the rolling line, etc., it is impossible to detect the insufficient width of the rough edge plate in time, and an alarm is issued for the insufficient width of the rough edge plate on the shearing line.

[0012] According to the present invention, the steel plate is centered using a centering device. Based on the uncut width information sent to the electrical basic control system L1 by the shearing line process control system L2 of the medium and heavy plate production line, the position of the double-sided shearing laser scriber is adjusted so that the distance between the two laser lines equals the uncut width. This laser scriber can thus easily determine whether the uncut width of the plate before double-sided shearing meets the standard. If the width is insufficient, the plate is promptly removed from the production line for processing, preventing unqualified steel plates from being delivered to the user.

[0013] The technical solution of the method for identifying and alarming insufficient width of rough edge plate at shear line of medium and thick plate of the present invention is as follows:

[0014] A method for identifying and alarming insufficient width of rough edge plate at shearing line of medium and thick plate, applicable to the shearing line L2 optimized shearing mathematical model of medium and thick plate shearing system, characterized in that:

[0015] This method is used in situations where there is no steel plate plane shape detection device PSG or the steel plate plane shape detection device PSG cannot be used, and it can identify and alarm the insufficient width of the rough edge plate before double-sided shearing caused by rolling deviation of the rolling line, etc.

[0016] The alarm method comprises the following steps:

[0017] 1) Double-edge / split shear calculation program in the optimized shear mathematical model is set for double-edge shearing. When a steel plate plane shape detection device PSG is provided on the shear line, the program module is used to determine the status of the plane shape detection device PSG and the width of the steel plate based on the plate shape coordinate data detected by the steel plate plane shape detection device PSG and the steel plate defects detected by the ultrasonic flaw detector UST;

[0018] 2) When the PSG status is confirmed to be unavailable and the rough edge plate needs to be double-sided sheared, the medium and heavy plate production line shearing line process control system L2 sends the rough edge plate contract width data to the electrical basic control system L1 through the production organization control system L3.

[0019] 3) Set up a magnetic head centering and positioning device to center and position the steel plate through the basic control system L1;

[0020] 4) Set up the double-sided shear laser scriber and adjust it so that the distance between the two laser lines is equal to the contract width of the rough edge board. Use laser marking to judge whether the width of the rough edge board meets the standard.

[0021] 5) If the width is insufficient, an alarm will be issued in time and the plate will be taken offline to avoid sending medium and thick plates with substandard rough edge width to users.

[0022] According to the present invention, a method for identifying and alarming insufficient width of rough edge plate at shear line of medium and thick plate is characterized in that:

[0023] Based on the plate shape coordinate data detected by the steel plate plane shape detection device PSG and the steel plate defects detected by the ultrasonic flaw detector UST, the shear model optimization process is as follows:

[0024] Step 1). Start by waiting for new steel plates to be calculated.

[0025] If yes, the steel plate is calculated and processed. At the same time, after determining the event type, the PDI plan data is read;

[0026] Event category refers to the steel plate tracking event code sent by L1 electrical automation to L2, including: 100-ordinary plate, 110 received PSG results, 890 received UST results, 900-rough cut change, etc.

[0027] If the PDI plan data is read successfully, enter the basic shear data calculation,

[0028] If the PDI plan data reading fails, it will enter the error data management library;

[0029] Step 2). Enter the basic shear data calculation. If the basic shear data calculation is successful, enter the PSG data reading.

[0030] If the basic shear data calculation fails, the error data management library will be entered;

[0031] Step 3). Enter PSG data reading, read PSG data, and perform temperature conversion.

[0032] Determine whether the steel plate is a normal plate or a sickle-bent steel plate;

[0033] Ordinary plates refer to steel plates other than sickle-bent plates, including trimmed plates and rough-edged plates;

[0034] If the steel plate is judged to be an ordinary plate, the following procedures will be entered in sequence:

[0035] Steel plate cutting head / tail calculation → cutting head and random length calculation → double-sided cutting / splitting cutting calculation → cut-to-length and random width calculation → drawing to display cutting results and UST performance;

[0036] Step 4). If errors are displayed in the calculation of steel plate head / tail cutting, head cutting and random length calculation, double-sided cutting / splitting cutting calculation, and cut-to-length and random width calculation, the calculations will be entered into the error data management library respectively;

[0037] Step 5). In addition, rough cut change calculations can be performed as needed, and after updating the PDI record, the error data management library can be entered;

[0038] The data in the error data management library returns to the starting stage, waiting to enter the new steel plate calculation program. Data reading failure means that the data is incomplete.

[0039] In the double-edge shear / split shear calculation, the logic of the rough edge plate setting in the double-edge shear calculation module is optimized.

[0040] There are two reasons why calculations fail due to incorrect data: first, there is human error during the calculation, resulting in incomplete data. The correct manual method will be selected for recalculation; second, there are errors in the input data itself. If errors are still confirmed in the data after eliminating human intervention, in these two cases, it is necessary to return to the starting stage to obtain complete and correct data.

[0041] According to the present invention, a method for identifying and alarming insufficient width of rough edge plate at shear line of medium and thick plate is characterized in that:

[0042] Based on the plate shape coordinate data detected by the steel plate plane shape detection device PSG and the steel plate defects detected by the ultrasonic flaw detector UST, the shear setting values ​​of each shearing machine, including the crop shear (CS), double-sided / split shear (DSS / SS), and cut-to-length shear (DS), are calculated.

[0043] According to the present invention, a method for identifying and alarming insufficient width of rough edge plate at shear line of medium and thick plate is characterized in that:

[0044] The shear settings for double-edged / split shears related to the rough edge width include:

[0045]

[0046] According to the present invention, a method for identifying and alarming insufficient width of rough edge plate at shear line of medium and thick plate is characterized in that:

[0047] Based on the PSG measurement data, the CS shear point calculation is optimized, taking into account the operating constraints, the plate shape (normal plate or sickle bent plate) and the plate temperature, and the cutting head / tail points as well as the rough cutting points and the cut-to-length segmentation points are set.

[0048] According to the present invention, a method for identifying and alarming insufficient width of rough edge plate at shear line of medium and thick plate is characterized in that:

[0049] Optimize DSS and SS set point calculation: calculate the shear point of double-sided shear / split shear according to the steel plate shape and temperature after head and segment shearing.

[0050] According to the present invention, a method for identifying and alarming insufficient width of rough edge plate at shear line of medium and thick plate is characterized in that:

[0051] Optimized DS set point calculation: Calculate the shear point for cut-to-length shearing based on the plate shape and temperature after double-sided shearing and split shearing.

[0052] The method for identifying and alarming insufficient width of rough edge plate at shearing line of medium and thick plate according to the present invention is characterized in that:

[0053] In the absence of plate plane shape data, that is, when PSG is unavailable,

[0054] Calculation of shear setpoints for DSS and SS:

[0055] (1) Set the shearing machine according to the contract data obtained from L2:

[0056] Object: rough edge board——

[0057] The contract width value of the steel plate was corrected for width tolerance and converted from hot to cold during the initial calculation stage of the model;

[0058] When the steel plate is about to enter the DSS, the corrected contract width value of the steel plate is sent to the electric double-sided shear basic control system L1 via telex, and L1 sets the width of the laser marking device to the correct position;

[0059] After the steel plate is magnetically aligned, the operator will determine whether the width is insufficient based on the laser marking position. Qualified steel plates will pass through the shearing machine without being cut and proceed to the DS sizing process.

[0060] Unqualified steel plates will be downgraded or scrapped and hoisted to offline stacks for further processing.

[0061] (2) Except for the plate assembly pattern A, the rough edge plates or the plates that cannot be split will pass through the shearing machine directly without being sheared;

[0062] (3) Except for the above cases, the steel plates are sheared according to the following setting values:

[0063] DSS opening width = maximum product width

[0064] SS opening width = maximum product width on the operating side (when splitting is required),

[0065] Here, "plate assembly mode is A" means single-row plate assembly mode, and the sub-plates are arranged in sequence on the large plate, without the need to use a split shear to cut the steel plate in half in the width direction.

[0066] According to the present invention, a method for identifying and alarming insufficient width of rough edge plate at shearing line of medium and thick plate is characterized in that:

[0067] In the case of rough-edged plates, the steel plates are not completely cooled when unloaded from the cooling bed, and the shear length of the final finished steel plate is determined by the ambient temperature. Therefore, it is necessary to compensate for the length change caused by thermal expansion during shearing. The temperature prediction model will predict the steel plate temperature at the shearing equipment and send the predicted value to the shear position calculation model.

[0068] According to the present invention, the steel plate width conversion formula is:

[0069] Hot plate width = K H *Cold steel plate width,

[0070] Among them, K H =1.0+(H1*10 -4 *T-H2*10 -4 )

[0071] H1=0.09

[0072] H2=0

[0073] T = steel plate temperature (°C).

[0074] This avoids changes in the size of the finished steel plate caused by temperature changes.

[0075] According to the present invention: the process control system L2 formulates a corresponding shearing plan, i.e., the shearing setting value, for each shearing machine according to the latest steel plate arrangement. At the same time, the process control system L2 sends the formulated shearing plan to the basic automation PLC through the production organization control system L3. In addition, the printing data for the mother plate and the sample are also sent to the printer through the basic automation PLC.

[0076] A recognition and alarm system for insufficient width of rough edge plate before shearing of medium and heavy plates is used in situations where there is no plane shape detection device or the steel plate plane shape detection device PSG cannot be used. It can identify and alarm insufficient width of rough edge plate before double-sided shearing due to rolling deviation of the rolling line, etc.

[0077] It is characterized by:

[0078] The alarm system comprises:

[0079] Optimized shearing mathematical model for determining the plane shape and width of steel plates;

[0080] Optimize the shearing mathematical model to set up the double-edge / split shearing calculation program module. When the PSG status is confirmed to be unavailable and the rough-edged plate needs to be double-edge sheared, the rough-edged plate contract width data is sent to the electrical basic control system L1 through the medium and heavy plate production line shearing line process control system L2.

[0081] The magnetic head centering positioning device and double-sided shear laser scriber installed on the shearing line of the medium and thick plate shearing system can center the steel plate through the basic control system L1, adjust the double-sided shear laser scriber, and judge whether the width of the rough edge plate meets the standard through laser marking.

[0082] Therefore, if the width is insufficient, an alarm will be issued in time and the plate will be taken offline to avoid the delivery of medium and thick plates with substandard rough edge width to users.

[0083] The identification and alarm system for insufficient width of rough edge plate at shearing line of medium and thick plate according to the present invention is characterized in that:

[0084] When a steel plate plane shape detection device PSG for detecting plate shape coordinate data is provided on the shear line, the shear model optimization process is as follows based on the plate shape coordinate data detected by the steel plate plane shape detection device PSG and the steel plate defects detected by the ultrasonic flaw detector UST:

[0085] Start, wait for new steel plates to be calculated,

[0086] If yes, the steel plate is calculated and processed. At the same time, after judging the event type, the PDI, i.e. the planned data, is read;

[0087] If the PDI plan data is read successfully, enter the basic shear data calculation,

[0088] If the PDI plan data reading fails, it will enter the error data management library;

[0089] Enter the basic shear data calculation. If the basic shear data calculation is successful, enter the PSG data reading.

[0090] If the basic shear data calculation fails, the error data management library will be entered;

[0091] Enter PSG data reading, read PSG data, and perform temperature conversion.

[0092] Determine whether the steel plate is a normal plate or a sickle-bent steel plate;

[0093] Ordinary plates refer to steel plates other than sickle-bent plates, including trimmed plates and rough-edged plates.

[0094] If the steel plate is judged to be an ordinary plate, the following procedures will be entered in sequence:

[0095] Steel plate cutting head / tail calculation → cutting head and random length calculation → double-sided cutting / splitting cutting calculation → cut-to-length and random width calculation → drawing to display cutting results and UST performance;

[0096] If errors are displayed in the calculation of steel plate head / tail cutting, head cutting and random length calculation, double-sided cutting / splitting cutting calculation, and cut-to-length and random width calculation, they will be entered into the error data management library respectively;

[0097] If the steel plate is judged to be a sickle-bent steel plate after the temperature conversion, the sickle-bent steel plate calculation is performed;

[0098] In addition, rough cutting change calculations can be performed as needed, and after updating the PDI record, the error data management library can be entered;

[0099] The data in the error data management library returns to the starting stage, waiting to enter the new steel plate calculation program.

[0100] According to the present invention: the process control system L2 formulates a corresponding shearing plan, i.e., the shearing setting value, for each shearing machine according to the latest steel plate arrangement. At the same time, the process control system L2 sends the formulated shearing plan to the basic automation PLC through the production organization control system L3. In addition, the printing data for the mother plate and the sample are also sent to the printer through the basic automation PLC.

[0101] According to the present invention, the magnetic traverse device and laser marking device for the steel plate in front of the shear are manually positioned horizontally based on the optimization calculation results. The purpose of the traverse is to center the steel plate to prevent deviation during conveyance on the roller conveyor.

[0102] According to the present invention, a recognition and alarm system for insufficient width of rough edge plate at shearing line of medium and thick plate is characterized in that:

[0103] Based on the plate shape coordinate data detected by the steel plate plane shape detection device PSG and the steel plate defects detected by the ultrasonic flaw detector UST, the shear setting values ​​of each shearing machine, including the crop shear (CS), double side / split shear (DSS / SS), and cut-to-length shear (DS), are calculated according to the double side / split shear calculation logic model in the optimized shearing mathematical model.

[0104] The present invention is applicable to the optimized shearing model of thick plates, and the key points for controlling the shearing dimensions are as follows:

[0105] The length and width accuracy of steel plates cut on a thick plate shearing line is a key indicator of product quality. The diverse two-dimensional distribution of finished sub-plates on a mother plate—meaning a single rolled mother plate often contains several or many finished sub-plates with varying dimensions and tolerances—also complicates the automated measurement of each individual plate due to the non-rectangular or cambered shape of the rolled plate.

[0106] To realize the automation of thick plate shearing and ensure the length and width of the sheared steel plate, the following conditions must be met:

[0107] Accurate measurement technology to measure the actual planar shape of rolled steel plates;

[0108] Effective algorithms and models to measure the shape of steel plates in real time and provide the actual shape data of rolled steel plates;

[0109] Reliable control algorithm to determine the cutting position of each cutting device.

[0110] According to the present invention, in order to ensure the dimensional accuracy of thick plate shearing, the optimized shearing model of the secondary process computer comprehensively considers the dimensional specifications of the finished plate, such as: dimensional tolerances of all finished plates, sickle bend limits, and the straightness of the finished plates; however, there are limitations on the shearing dimension control equipment of the shearing line.

[0111] For example: the upper / lower tolerance limits on the length and width of the steel plate after shearing, the shearing capacity of the shearing machine on the thickness of the steel plate, the maximum / minimum trimming amount of the double-sided shearing, etc. Usually, the width of the steel plate after shearing is limited to 4.8 meters, the length is 50 meters, and the minimum trimming amount is 3 mm.

[0112] According to the present invention, the equipment related to shearing line shearing size control mainly includes:

[0113] Crop Shear: Used to cut the head and tail of the rolled plate, and roughly divide the rolled plate into several mother plates of appropriate length.

[0114] Double Side Trimming Shear (DSS): used to shear both sides of the motherboard.

[0115] Slitting Shear (SS): used to split the motherboard longitudinally.

[0116] Dividing Shear (DS): used to cut the mother plate into finished plates of appropriate length and complete the sampling of related steel plates at the same time.

[0117] The shearing sequence and scheme of the steel plate are shown in Figure 1 . Cutting order operation:

[0118] The steel plates are transported by rollers along the length direction to the cropping shear, double-edge / splitting shear, and cut-to-length shear, and are cut into different lengths and widths according to the settings.

[0119] Figure 1 In the example, the shears (1-4) at the CS of the crop shear are:

[0120] First head shear, second head shear, first motherboard shear, first tail shear and second motherboard shear,

[0121] The shear forces (5,6) at the double shear point are:

[0122] The first motherboard is trimmed, and the second motherboard is trimmed;

[0123] The shearing (7) at the splitting shear is the splitting of the second motherboard (conducted simultaneously with step 6);

[0124] The shearing of DS at the cut-to-length position and the shearing of the specimen (8-10) are:

[0125] The first head specimen shearing, the first contract plate shearing and the second contract plate shearing;

[0126] 11 to 13 are all shearing of contract boards (parallel shearing). In addition, in order to achieve the rectangularity of the contract board, additional shearing is required at the head and tail of each mother board.

[0127] According to the present invention, the shearing system has the following functions:

[0128] 1) Temperature prediction and size conversion,

[0129] 2) Calculation of shear position,

[0130] 3) Steel plate plane shape tracking.

[0131] Furthermore, the steel plate is not fully cooled when it is unloaded from the cooling bed, and the final shear length of the finished steel plate is determined by the ambient temperature. Therefore, it is necessary to compensate for the length change caused by thermal expansion during shearing. The temperature prediction model calculates the steel plate temperature at the shearing equipment and sends the predicted value to the shear position calculation model.

[0132] Width conversion formula:

[0133] Hot plate width = K H H*Cold steel plate width

[0134] K H =1.0+(H1*10 -4 *T-H2*10 -4 ),

[0135] H1=0.09,

[0136] H2=0,

[0137] T = steel plate temperature (°C).

[0138] The basic data flow of the model calculation of the present invention is as follows:

[0139] 1. For each steel plate heading to the PSG, L2 first sends the basic setting values ​​(such as the length, width and thickness of the current steel plate transmitted from the rolling line L2 computer) to the PSG and UST (ultrasonic flaw detector).

[0140] 2. After receiving the shape data of the steel plate from PSG, L2 determines the arrangement of the mother plate and the finished plate on the rolling plate based on the PDI (planned data) and the actual shape data of the steel plate (for example, sickle bend).

[0141] 3. L2 sends the optimized setting data (including the position and size of the finished board) to UST by telegram.

[0142] 4. The ultrasonic flaw detector UST evaluates steel plate defects, sets the inspection results for each finished plate and sends the UST inspection result text to L2.

[0143] 5. The L2 operating interface UST Check can display the plate shape, the arrangement of the mother plate (including the finished plate), the UST inspection results, the location and size of the main defects (the largest 50 defects), and the rough cutting position, etc.

[0144] The L2 operator can move the mother plate (including the finished plate) slightly in the vertical and horizontal directions of the rolled plate to avoid related defects in the finished plate. At the same time, the operator can insert or delete rough cuts (rough cut changes) according to actual needs on this screen.

[0145] 6. After the operator confirms his corrections (including correcting the position of the steel plate and changing the rough cut), L2 sends the updated data to UST.

[0146] 7. UST re-evaluates the defect results and sets the corresponding inspection results for each finished board based on the updated finished board position. At the same time, UST sends the result message to L2 again.

[0147] The above steps 5, 6, and 7 can be repeated.

[0148] The double side shear (DSS) / split shear (SS) shear model calculation of the present invention is mainly based on the plane shape tracking data of the steel plate after head shearing and segmented rough cutting, as well as the steel plate temperature measured by the temperature meter before double side shearing, combined with the temperature compensation model, to calculate the shearing position of double side shearing and split shearing.

[0149] The steel plates to be sheared can be divided into trimmed and rough-edged plates. The shearing machine instructions for double shearing and split shearing can be divided into double shearing + split shearing and double shearing. The various combinations of production conditions complicate the calculation of optimized shearing. However, in each case, the optimized shearing calculation must take into account the minimum and maximum trimming limits for double shearing. The minimum trimming limit is primarily determined by the trimming quality requirements, while the maximum trimming limit is based on the mechanical limits of the shearing machine. The magnetic plate transverse movement device and laser marking device in front of the shear are manually operated to horizontally position the steel plate according to the optimized calculation results. BRIEF DESCRIPTION OF THE DRAWINGS

[0150] Figure 1 The diagram is a schematic diagram of the shearing sequence and scheme of the steel plate;

[0151] Figure 2 Schematic diagram of the trimming method;

[0152] Figure 3 This is a schematic diagram of the non-cutting method;

[0153] Figure 4 Schematic diagram of the laser marking device used to indicate the shearing position on the steel plate before double-sided shearing.

[0154] Figure 5 This is the layout diagram of the magnetic centering device.

[0155] Figure 6 Calculation logic diagram for bilateral shearing.

[0156] Figure 7 Flowchart for optimized shearing model.

[0157] Figure 1 In the example, the shears (1-4) at the CS of the crop shear are:

[0158] First head shear, second head shear, first motherboard shear, first tail shear and second motherboard shear,

[0159] The shear forces (5,6) at the double shear point are:

[0160] The first motherboard is trimmed, and the second motherboard is trimmed;

[0161] The shearing (7) at the splitting shear is the splitting of the second motherboard (conducted simultaneously with step 6);

[0162] The shearing of DS at the cut-to-length position and the shearing of the specimen (8-10) are:

[0163] The first head specimen shearing, the first contract plate shearing and the second contract plate shearing;

[0164] 11 to 13 are all shearing of contract boards (parallel shearing). In addition, in order to achieve the rectangularity of the contract board, additional shearing is required at the head and tail of each mother board.

[0165] Figure 7 In the double-sided shear calculation time, the time is: 1) the steel plate enters the entrance roller of DSS, 2) the steel plate goes online to the entry side of DSS. DETAILED DESCRIPTION

[0166] Example 1

[0167] See Figure 1-Figure 7 A method and system for identifying and alarming insufficient burr width on a medium and heavy plate shearing line is disclosed. The method is applicable to the optimized shearing mathematical model of the shearing line L2 of a medium and heavy plate shearing system. The method is used in situations where there is no plane shape detection device or the steel plate plane shape detection device PSG cannot be used. The method identifies and alarms insufficient burr width before double-sided shearing due to rolling deviation, etc. The alarm method includes the following steps:

[0168] 1) Setting the double-sided shear / split shear calculation program module in the optimized shear mathematical model. Based on the plate shape coordinate data detected by the steel plate plane shape detection device PSG and the steel plate defects detected by the ultrasonic flaw detector UST, the program module is used to determine the status of the steel plate plane shape detection device PSG and the steel plate width.

[0169] 2) When the PSG status is confirmed to be unavailable and the rough edge plate needs to be double-sided sheared, the rough edge plate contract width data is sent to the electrical basic control system L1 through the medium and heavy plate production line shearing line process control system L2,

[0170] 3) Set up a magnetic head centering and positioning device to center and position the steel plate through the basic control system L1;

[0171] 4) Set up the double-sided shear laser scriber and adjust it so that the distance between the two laser lines is equal to the contract width of the rough edge board. Use laser marking to judge whether the width of the rough edge board meets the standard.

[0172] 5) If the width is insufficient, an alarm will be issued in time and the plate will be taken offline to avoid sending medium and thick plates with substandard rough edge width to users.

[0173] In this embodiment, based on the plate shape coordinate data detected by the steel plate plane shape detection device PSG and the steel plate defects detected by the ultrasonic flaw detector UST, the shear model optimization process is as follows:

[0174] Start, wait for new steel plates to be calculated,

[0175] If yes, the steel plate is calculated and processed. At the same time, after judging the event type, the PDI (plan data) is read;

[0176] If the planned data is read successfully, enter the basic shear data calculation,

[0177] If the planned data reading fails, the error data management library will be entered;

[0178] Enter the basic shear data calculation. If the basic shear data calculation is successful, enter the PSG data reading.

[0179] If the basic shear data calculation fails, the error data management library will be entered;

[0180] Enter PSG data reading, read PSG data, and perform temperature conversion.

[0181] Determine whether the steel plate is a normal plate or a sickle-bent steel plate;

[0182] Ordinary plates refer to steel plates other than sickle-bent plates, including trimmed plates and rough-edged plates.

[0183] If the steel plate is judged to be an ordinary plate, the following procedures will be entered in sequence:

[0184] Steel plate cutting head / tail calculation → cutting head and random length calculation → double-sided cutting / splitting cutting calculation → cut-to-length and random width calculation → drawing to display cutting results and UST performance;

[0185] If errors are displayed in the calculation of steel plate head / tail cutting, head cutting and random length calculation, double-sided cutting / splitting cutting calculation, and cut-to-length and random width calculation, they will be entered into the error data management library respectively;

[0186] If the steel plate is judged to be a sickle-bent steel plate after the temperature conversion, the sickle-bent steel plate calculation is performed;

[0187] In addition, rough cutting change calculations can be performed as needed, and after updating the PDI record, the error data management library can be entered;

[0188] The data in the error data management library returns to the starting stage, waiting to enter the new steel plate calculation program.

[0189] In this embodiment, the shear position calculation model includes the following program data:

[0190] -A-

[0191] add_rough_cut():cc_rough_cut_chge.c

[0192] AddToMessageLog():service.h,service.c

[0193] -C-

[0194] calc_ccs_basic():cc_prot.h,cc_calcs.c

[0195] calc_cs_cuts():cc_prot.h,cc_calcs.c

[0196] calc_falcate_draw():cc_prot.h,cc_falcate_draw.c

[0197] calc_mother_plate_len():cc_prot.h,cc_calcs.c

[0198] calc_mother_plate_wid():cc_prot.h,cc_calcs.c

[0199] calc_plate_draw():cc_prot.h,cc_calcs_draw.c

[0200] calcs_crop_bottom():cc_prot.h,cc_crop_len.c

[0201] calcs_crop_top():cc_prot.h,cc_crop_len.c

[0202] calcs_falcate_plate():cc_prot.h,cc_falcate_calcs.c

[0203] calcs_random_len():cc_random_size.c,cc_prot.h

[0204] calcs_random_wid():cc_random_size.c,cc_prot.h

[0205] calcs_shortage_len():cc_shortage_surplus.c,cc_calcs_cs.c

[0206] calcs_surplus_len():cc_shortage_surplus.c,cc_prot.h,cc_calcs_cs.c

[0207] cc_cut_chg():cc_prot.h

[0208] cc_ds_len():cc_prot.h,cc_calcs_ds.c

[0209] cc_dss_falcate_nontrim():cc_prot.h,cc_falcate_dss_ss.c

[0210] cc_dss_falcate_normal():cc_prot.h,cc_falcate_dss_ss.c

[0211] cc_dss_falcate_uo():cc_prot.h,cc_falcate_dss_ss.c

[0212] cc_dss_nontrim():cc_prot.h,cc_calcs_dss_ss.c

[0213] cc_dss_normal():cc_prot.h,cc_calcs_dss_ss.c

[0214] cc_dss_ss_calcs():cc_prot.h,cc_calcs_dss_ss.c

[0215] cc_dss_ss_falcate():cc_prot.h,cc_falcate_dss_ss.c

[0216] cc_dss_uo_plate():cc_prot.h,cc_calcs_dss_ss.c

[0217] CC_exit():cc_prot.h,cc.c

[0218] cc_falcate_autocut_chg():cc_cut_chg.c

[0219] cc_rough_cut_chge():cc_rough_cut_chge.c

[0220] CheckMsgFile():msg.c,LIB_PROT.H

[0221] CmdDebugService():service.c

[0222] CmdInstallService():service.c

[0223] CmdRemoveService():service.c

[0224] cold_hot_len():cc_t_convert.c,cc_t_comp.c,cc_prot.h

[0225] cold_hot_wid():cc_t_convert.c,cc_t_comp.c,cc_prot.h

[0226] ControlHandler():service.c

[0227] convert_monat_name():LIB_DBM.c

[0228] -D-

[0229] dbg_printf():msg.c,LIB_PROT.H

[0230] dbm_alert_signal():LIB_PROT.H,LIB_DBM.c

[0231] dbm_alert_waitany():LIB_PROT.H,LIB_DBM.c

[0232] dbm_commit():LIB_PROT.H,LIB_DBM.c

[0233] dbm_end():LIB_PROT.H,LIB_DBM.c

[0234] dbm_error():LIB_PROT.H,LIB_DBM.c

[0235] dbm_init():LIB_PROT.H,LIB_DBM.c

[0236] dbm_is_connected():LIB_PROT.H,LIB_DBM.c

[0237] dbm_register():LIB_PROT.H,LIB_DBM.c

[0238] dbm_remove():LIB_PROT.H,LIB_DBM.c

[0239] dbm_rollback():LIB_PROT.H,LIB_DBM.c

[0240] dbm_sel_next_msn():LIB_PROT.H

[0241] dbm_set_sm_status():LIB_PROT.H

[0242] dbm_upd_last_system_change():LIB_PROT.H

[0243] dbm_upd_node_status():LIB_PROT.H

[0244] determ_mother_plate_idx():cc_prot.h,cc_calcs.c

[0245] do_cc_drawing():cc_prot.h,CC_DRAWING.c

[0246] dummy_func():LIB_PROT.H,LIB_M.C

[0247] -F-

[0248] fetch_sample():cc_rough_cut_chge.c

[0249] FindString():LIB_PROT.H,LIB_M.C

[0250] -G-

[0251] g_flush_output():LIB_PROT.H

[0252] g_reopen_output():LIB_PROT.H

[0253] get_connect_string():LIB_PROT.H

[0254] GetDStr():LIB_PROT.H,LIB_M.C

[0255] GetDTStr():LIB_PROT.H,LIB_M.C

[0256] GetLastErrorText():service.c

[0257] GetMsgDTStr():LIB_PROT.H,LIB_M.C

[0258] GetTStr():LIB_PROT.H,LIB_M.C

[0259] -H-

[0260] hot_cold_len():cc_t_convert.c,cc_t_comp.c,cc_prot.h

[0261] hot_cold_wid():cc_t_convert.c,cc_t_comp.c,cc_prot.h

[0262] -L-

[0263] lib_com_atoi():LIB_M.C

[0264] lib_com_atos():LIB_M.C

[0265] lib_com_chg_dt():LIB_M.C

[0266] lib_com_conv_time():LIB_PROT.H,LIB_M.C

[0267] lib_com_determ_day():LIB_PROT.H,LIB_M.C

[0268] lib_com_itoa():LIB_PROT.H,LIB_M.C

[0269] lib_com_set_timer():LIB_M.C

[0270] lib_com_sys_time():LIB_PROT.H,LIB_M.C

[0271] lib_com_sys_time_to_orachar():LIB_M.C

[0272] -M-

[0273] main():service.h,service.c

[0274] -O-

[0275] OpenAndReadFile():LIB_PROT.H,LIB_M.C

[0276] OpenAndWriteFile():LIB_PROT.H,LIB_M.C

[0277] os_com_vms_set_timer():LIB_PROT.H

[0278] os_com_win_conv_time():LIB_PROT.H,LIB_M.C

[0279] os_com_win_set_timer():LIB_PROT.H,LIB_M.C

[0280] os_com_win_sys_time():LIB_PROT.H,LIB_M.C

[0281] -P-

[0282] pad_chars():LIB_PROT.H,LIB_DBM.c

[0283] -R-

[0284] read_cc_action():cc_prot.h,cc_dbm.c

[0285] reduce_rough_cut():cc_rough_cut_chge.c

[0286] ReportStatusToSCMgr():service.h,service.c

[0287] rlen():LIB_PROT.H,LIB_DBM.c

[0288] -S-

[0289] search_pic():cc_prot.h,cc_calcs.c

[0290] sel_param():cc_crop_len.c

[0291] sel_param_chg():cc_rough_cut_chge.c

[0292] sel_param_cs():cc_calcs_cs.c

[0293] sel_param_ds():cc_calcs_ds.c

[0294] sel_param_dss():cc_calcs_dss_ss.c

[0295] sel_param_falcate():cc_falcate_dss_ss.c

[0296] sel_paraml():cc_falcate_calcs.c

[0297] sel_paramn():cc_dbm.c

[0298] sel_paramt():cc_t_convert.c

[0299] sel_PDI():cc_prot.h,cc_dbm.c

[0300] sel_PSG():cc_prot.h,cc_dbm.c

[0301] service_ctrl():service.c

[0302] service_main():service.c

[0303] ServiceStart():service.h,cc.c

[0304] ServiceStop():service.h,cc.c

[0305] SVGCalcPx():cc_prot.h,cc_graphics_1024x768.c,CC_DRAWING.c

[0306] -T-

[0307] tcp_setsockopt():LIB_PROT.H

[0308] -W-

[0309] write_cc_graphic():cc_graphics_1024x768.c,cc_graphics.c.

[0310] See Figure 7 In this embodiment, the basic data flow of model calculation is as follows:

[0311] 1) For each steel plate heading to the PSG, L2 first sends basic setting values ​​(such as the length, width, and thickness of the current steel plate transmitted from the rolling line L2 computer) to the PSG and UST (ultrasonic flaw detector);

[0312] 2) After receiving the shape data of the steel plate from PSG, L2 determines the arrangement of the mother plate and / or finished plate on the rolling plate based on the PDI, i.e. the planned data, and the actual shape data of the steel plate (e.g. camber);

[0313] 3) In the process control system L2, the shearing setting value data is optimized and the optimized shearing setting value data (including the position and size of the finished plate) is sent to the UST by telegram;

[0314] 4) The ultrasonic flaw detector UST evaluates steel plate defects, sets the test results (flaw detection code, defect location, etc.) for each finished plate, and sends the UST test result message to the process control system L2;

[0315] 5) The shape of the steel plate, the arrangement of the mother plate and / or finished plate, the UST test results, the location and size of the main defects, and the rough cutting position are displayed on the L2 operation interface of the process control system UST Check;

[0316] During the above process, the operator of the process control system L2 can move the mother plate (or finished plate) in a small amount in the vertical and horizontal directions of the rolled plate to avoid related defects on the finished plate. At the same time, the operator can insert or delete rough cutting changes according to actual needs on the process control system L2 operation interface;

[0317] 6) After the operator confirms the revised shear setting value (including the revised steel plate position and the changed rough cut), the process control system L2 sends the updated data to the UST. The revised (updated) shear setting value includes the revised steel plate position and the changed rough cut.

[0318] 7) UST re-evaluates the defect results and sets the corresponding test results for each finished board according to the updated finished board position. UST then sends the test result message to L2 again.

[0319] See Figure 6 Based on the plate shape coordinate data detected by the steel plate plane shape detection device PSG and the steel plate defects detected by the ultrasonic flaw detector UST, the shear setting values ​​of each shearing machine, including the crop shear (CS), double side / split shear (DSS / SS), and cut-to-length shear (DS), are calculated according to the double side / split shear calculation logic model in the optimized shearing mathematical model.

[0320] The basic settings are mainly PDI production plan information, which is generally sent to measuring instruments.

[0321] The shearing setting value is sent to the three shearing devices after the model calculation, and includes processed data such as shearing size, sub-plate number, and printing information.

[0322] In the absence of plate plane shape data, that is, when PSG is unavailable,

[0323] Calculation of shear setpoints for DSS and SS:

[0324] (1) Set the shearing machine according to the contract data obtained from L2:

[0325] Object: rough edge board——

[0326] The contract width value of the steel plate was corrected for width tolerance and converted from hot to cold during the initial calculation stage of the model;

[0327] When the steel plate is about to enter the DSS, the corrected contract width value of the steel plate is sent to the electric double-sided shear basic control system L1 via telex, and L1 sets the width of the laser marking device to the correct position;

[0328] After the steel plate is magnetically aligned, the operator will determine whether the width is insufficient based on the laser marking position. Qualified steel plates will pass through the shearing machine without being cut and proceed to the DS sizing process.

[0329] Unqualified steel plates will be downgraded or scrapped and hoisted into offline stacks for further processing.

[0330] (2) Except for the steel plate assembly pattern A, the rough edge plates or the steel plates that cannot be split will pass through the shearing machine directly without being sheared.

[0331] (3) Except for the above cases, the steel plates are sheared according to the following setting values:

[0332] DSS opening width = maximum product width

[0333] SS opening width = maximum product width on the operating side (if splitting is required).

[0334] In the absence of plate plane shape data, i.e. when PSG is unavailable, the shear setting values ​​of DSS and SS are calculated as follows:

[0335] (1) Set the shearing machine according to the contract data obtained from L2:

[0336] Object: Special steel plate (a kind of rough edge plate)——

[0337] The contract width value of the steel plate was corrected for width tolerance and converted from hot to cold during the initial calculation stage of the model;

[0338] When the steel plate is about to enter the DSS, the corrected contract width value of the steel plate is sent to the electric double-sided shear basic control system L1 via telex, and L1 sets the width of the laser marking device to the correct position;

[0339] After the steel plate is magnetically aligned, the operator will determine whether the width is insufficient based on the laser marking position. Qualified steel plates will pass through the shearing machine without being cut and proceed to the DS sizing process.

[0340] Unqualified steel plates will be downgraded or scrapped and hoisted to offline stacks for further processing.

[0341] (2) Except for the plate assembly pattern A, the rough edge plates or the plates that cannot be split will pass through the shearing machine directly without being sheared;

[0342] (3) Except for the above cases, the steel plates are sheared according to the following setting values:

[0343] DSS opening width = maximum product width

[0344] SS opening width = maximum product width on the operating side (if splitting is required).

[0345] In this embodiment, the main parameters of the laser scribing device are:

[0346] Number of bridges: 2, number of laser generators on each bridge: 4 (2 on the fixed side and 2 on the movable side, arranged front to back),

[0347] The distance between the laser generator on the fixed side and the center line of the roller: 2450mm,

[0348] Transverse travel of the laser generator on the mobile side: max.3600 (1200-4800mm),

[0349] Traverse speed: 0-100mm / s,

[0350] Laser color: red.

[0351] Magnetic centering device Figure 5 The magnetic heads of the magnetic head centering device are located between the double-sided shear input rollers. Each head is mounted on a transverse carriage, and each head can be raised and lowered independently. The carriage moves on guide rails via a hydraulic cylinder equipped with a position sensor. The position of the magnetic heads is pre-set according to the actual width of the incoming material. When the magnetic heads lift the steel plate, the heads at the head and tail of the plate are responsible for the transverse movement of the plate. The head located in the middle of the plate supports the plate and automatically moves transversely with the head and tail heads. This device primarily adjusts the transverse position of the rough-cut mother plate on the rollers to meet the required trimming requirements.

[0352] In this embodiment, the main technical parameters of the magnetic centering device are:

[0353] Quantity: 7; Head moving distance: 650~2450mm (relative to the fixed side shear blade), lifting distance: -70~+50mm (relative to the +800mm roller surface); Single head thrust: 9,000kg, Single head lifting force: 13,000kg, Head size: 1,400×300mm.

[0354] In this embodiment, the temperature prediction model predicts the steel plate temperature at the shearing equipment and sends the predicted value to the shear position calculation model. Combined with the double-sided shearing model algorithm, all shear setting values ​​of each shear are calculated. The shearing equipment specifically refers to a set of rollers at the double-sided shear entrance.

[0355] In addition, when PSG detects the shape of rolled large plates and performs subsequent shearing operations, the steel plates are in a hot state (temperature limit 150°C), while the finished plates are ultimately delivered in a cold state. Therefore, when calculating the model, the hot coordinate data of the plate shape and the customer's cold order target size must be scientifically and reasonably unified, converted, and transported.

[0356] The conversion between hot and cold states is carried out according to the following formula:

[0357] Hot steel plate length = KN × cold steel plate length:

[0358] KN=1.0+(N1×10-7×(T-N4)2-N2×10-5×(T-N4)+N3×10-3)

[0359] Hot steel plate width = KH × cold steel plate width:

[0360] KH=1.0+(H1×10-4×T-H2×10-4)

[0361] in,

[0362] K N =hot and cold length conversion coefficient,

[0363] N1-N4 empirical parameters, T = temperature difference, H1 =, H2 = hot / cold surface heat exchange coefficient.

[0364] This avoids changes in the size of the finished steel plate caused by temperature changes, ultimately ensuring the cold order target size value required by the customer.

[0365] In this embodiment, the UST test results and main defects include:

[0366] Basic size information of steel plate, steel type, product code, defect code, defect quantity, and defect coordinates.

[0367] In this embodiment, the optimized shearing calculation takes into account the minimum and maximum trimming limits for double-sided shearing. The minimum trimming limit is primarily determined by trimming quality requirements, while the maximum trimming limit is based on the shearing machine's mechanical limits. The minimum and maximum trimming limits for double-sided shearing are inherent parameters of the equipment and are typically recorded in a constant table.

[0368] In this embodiment, a laser marking device and a magnetic centering device are provided, and management standards for the laser marking device are provided to display the shearing position on the steel plate before double-sided shearing.

[0369] Example 2

[0370] Except for the following differences, the other aspects are the same as those in Example 1:

[0371] In the absence of plate plane shape data, that is, when PSG is unavailable,

[0372] Calculation of shear setting values ​​for DSS and SS, using manual shear change

[0373]

[0374] Table 1

[0375]

[0376] M stands for burr.

[0377] According to Example 1 and Example 2, see Table 1, before implementation:

[0378] The measured rolling width of individual steel plates is smaller than the contract width. If this cannot be identified, it will cause quality disputes.

[0379] According to the present embodiment 1 and embodiment 2, after implementation:

[0380] When the steel plate reaches the entrance roller of the double shearing machine and is centered, L2 transmits the steel plate to the contracted width. L1 adjusts the position of the double shearing laser scriber so that the distance between the two laser lines is equal to the contracted width of the rough edge plate. Laser scribing can easily determine if the rough edge plate width is unqualified. If the measured width is less than the contracted width, the machine will be taken off the production line immediately for processing, avoiding quality issues caused by unqualified steel plates being delivered to users.

[0381] That is, the possibility of unqualified products with insufficient width of rough-edged plates before double-sided shearing due to rolling deviation of the rolling line, etc., flowing into the hands of users is reduced, the product qualification rate is improved, and the technical cost reduction potential of the production and operation process is tapped.

[0382] Reference Example

[0383] The following is a reference example, which shows the production process flow of a shearing line with the PSG measuring instrument intact, for comparison with Example 2. This example is of reference significance for understanding the inventive nature of the present invention, as well as for understanding the normal production sequence with the PSG measuring instrument and the value of the present invention in controlling product width precision under adverse conditions where the PSG is unavailable.

[0384] Reference Example 1 (Reference Example 1 is a production process flow of a shearing line with the PSG detection equipment intact, used for comparison with Example 2 to understand the value of the present invention in controlling product width precision under unfavorable conditions where the PSG is unavailable.)

[0385] Calculation of shear setting values ​​for DSS and SS (first case, when there is planar shape data, i.e. when PSG is available)

[0386] Target: Special steel plate (a type of rough edge plate)

[0387] If the width of the steel plate exceeds the upper limit of the steel plate width, the excess part must be cut off by DSS. Otherwise, it will pass through DSS without cutting. However, for steel plates with large sickle bend, some edges can be left uncut.

[0388] (1) Make the center line of the widest product consistent with the center line of the effective width of the mother plate (for split steel plates, the center of the sum of the widths of the two steel plates should be consistent with the center line of the effective width of the mother plate).

[0389] (2) If the steel plate width is insufficient (effective width < minimum target width), the steel plate will pass directly without being cut and will be downgraded or scrapped.

[0390] (3) Otherwise, check whether it is greater than the maximum target width (width upper limit). (Effective width >= minimum target width)

[0391] <Panel Mode: A>

[0392] If excess amount = maximum width - maximum target width > 0, the width exceeds the upper tolerance limit.

[0393] <Panel Mode: S>

[0394] Excess (operating side) = Maximum width (operating side) - Maximum target width (operating side) > 0, and

[0395] If excess (transmission side) = maximum width (transmission side) - maximum target width (transmission side) > 0, the width exceeds the upper tolerance limit.

[0396] (4) Setting when the width exceeds the upper tolerance

[0397] a) In this case, the DSS operation mode is set manually and DSS shearing can be used. When the plate assembly mode is S and SS is available,

[0398] SS opening width = maximum product width (operating side)

[0399] DSS opening width = maximum product width (operating side) + maximum product width (transmission side)

[0400] When the plate assembly mode is not S, or SS is not available (plate assembly mode: A, i.e. single plate assembly mode),

[0401] DSS opening width = maximum product width

[0402] (Panel assembly mode: S, i.e. side-by-side panel assembly mode)

[0403] DSS opening width = maximum product width (operating side) + maximum product width (transmission side)

[0404] b) Except for the above cases, the materials can pass through the shears directly without being cut.

[0405] (5) Setting when the width does not exceed the upper tolerance

[0406] a) In this case, the DSS operation mode is set manually and DSS cutting is available.

[0407] SS opening width = maximum shape width (operating side) + margin (**)

[0408] DSS opening width = maximum width (*) + margin (**) × 2

[0409] (*) Maximum shape width = Maximum shape width (operating side) + Maximum shape width (transmission side)

[0410] (**) Residue = constant + bulge

[0411] b) Except for the above cases, the materials can pass through the shears directly without being cut.

[0412] (Note) Minimum target width = lower tolerance limit + allowance, maximum target width = upper tolerance limit - allowance.

[0413] Reference Example 2 (illustrates the common processing logic for two types of rough-edged boards)

[0414] Logic for calculating shear setpoints for DSS and SS (second case, when plane shape data is available, i.e., PSG is available)

[0415] Object: Shearing mode of rough-edged plate (finished steel plate containing rough edges in the mother plate).

[0416] When the motherboard contains rough-edged boards, the edges are not trimmed. If there are no rough-edged boards, the edges are trimmed.

[0417] The width of the rough edge plate is allowed to exceed the width tolerance.

[0418] If the mother plate contains rough-edged plates, the shearing method is selected according to the width deviation between the rough-edged plates and the trimmed steel plates.

[0419] (1-1) Panel assembly mode

[0420] a) When the finished steel plate with the largest width in the current mother plate is a rough-edged plate, it is assumed that the mother plate is trimmed to the width required by the contract for the rough-edged plate.

[0421] If the other trimmed steel plates on the mother plate meet the width tolerance requirements,

[0422] -->If yes, select the non-cutting method

[0423] -->Otherwise select trimming mode

[0424] The width of the rough edge product = the width of the rough edge product + the edge allowance

[0425] b) When the largest width finished steel plate in the mother plate is a trimmed steel plate, the mother plate is trimmed according to the width of the trimmed steel plate. If the rough edges of the finished steel plate in the mother plate meet the contract width range,

[0426] -->If yes, select trimming method

[0427] Otherwise, assume that the mother plate is sheared according to the upper limit of the trimmed steel plate

[0428] If the rough edge plate meets the contract width requirements,

[0429] -->If yes, select trimming method

[0430] And, the target width of the trimmed steel plate = the width of the rough product steel plate + the allowance

[0431] Otherwise, select the non-trimming method.

[0432] (1-2) Panel assembly mode: S, side-by-side panel assembly mode

[0433] The judgment method for the operating side and transmission side steel plates is the same as that for plate assembly mode A (single-row plate assembly mode).

[0434] If the judgment results of both sides are to select the trimming method, the motherboard uses the trimming method; otherwise, the non-trimming method is used.

[0435] (1-3) Panel mode: G, A+S mode, a large board has both side-by-side panels and single-panel sub-boards

[0436] If all the steel plates in a block in the plate grouping pattern G belong to the same contract number, the selection method is the same as that for the steel plate classification code A. The shear plate width on this block is equal to the sum of the width of each product plate and the upper limit width tolerance.

[0437] (2) Non-cutting method

[0438] (2-1) The shear position is set so that the center line of the widest product coincides with the center line of the effective width of the motherboard.

[0439] (2-2) Width Check

[0440] a) If the following inequality holds, the width check result is normal.

[0441] Wu>=Wk+α

[0442]

[0443] b) If the check result is not satisfied, the motherboard will pass DSS and SS without shearing.

[0444] Wu=effective width of motherboard;

[0445] Wk = maximum product width of uncut steel plate;

[0446] α = trimming allowance under different conditions.

[0447] (2-3) Check the upper limit of the edge allowance of the rough edge plate

[0448] a) The width margin is exceeded if the following conditions are met:

[0449] No trimming on both sides: Ws>=Wk+J1

[0450] One side without trimming: Ws>=Wk+J2

[0451] Ws=effective width-minimum trimming amount for double-sided shearing x2

[0452] Wk: Maximum product width of rough-edged board

[0453] J1, J2: Upper limit of edge allowance of rough edge plate

[0454] b) Parameter settings of DSS and SS when the edge margin exceeds

[0455] DSS opening width = Wk + J1 (no trimming on both sides)

[0456] DSS opening width = Wk + J2 (uncut edge on one side)

[0457] When the plate mode is S and split shear is available,

[0458] SS opening width = WkF + J2 (no trimming on both sides or no trimming on the operating side)

[0459] SS opening width = WkF (except for the above cases);

[0460] WkF = width between shear blades;

[0461] (2-4) The width check passed and the width margin did not exceed

[0462] a) Except when the plate pattern is S or shear cannot be split

[0463] DSS opening width = Wmax + distance from cutting edge to steel plate edge + drum correction x 2

[0464] b) The plate pattern is S and can be split and sheared

[0465] No trimming on both sides

[0466] Meet the upper limit condition of SS-->Only split and cut

[0467] SS opening width = WkF + minimum distance between the cutting edge and the edge of the steel plate (constant)

[0468] DSS opening width = Wmax + minimum distance from the cutting edge to the edge of the steel plate (constant) x 2

[0469] Does not meet the upper limit condition of SS --> Perform bilateral and split shearing (the transmission side of DSS is cut through)

[0470] SS opening width = upper limit of product width on the operating side (constant) + required margin (constant)

[0471] DSS opening width = SS opening width + WMmax

[0472] When the operating side is not trimmed

[0473] Meet the upper limit condition of SS --> DSS and SS shear (the operating side of DSS is sheared)

[0474] SS opening width = WFmax + required margin (constant)

[0475] DSS opening width = SS opening width + WKM

[0476] WFmax = maximum width between cutting blades;

[0477] WKM=minimum product width;

[0478] Does not meet the upper limit condition of SS --> DSS and SS shear (DSS shears on both sides)

[0479] SS opening width = upper limit of product width on the operating side (constant) + required margin (constant)

[0480] DSS opening width = SS opening width + WKM

[0481] In the case of no cutting on the transmission side --> DSS and SS shearing

[0482] SS opening width = WkF

[0483] DSS opening width = SS opening width + WMmax + the minimum distance between the M side cutting edge and the edge of the steel plate (constant)

[0484] Reference Example 3 (illustrates the usual processing logic for trimming boards)

[0485] Calculation logic of shear setting values ​​for DSS and SS (third case, when there is plane shape data, i.e., PSG is available) Object: ordinary steel plate, object is steel plate other than rough edge plate (including special steel plate),

[0486] <Target>

[0487] Double-sided shearing is performed according to the maximum width of the steel plate in the mother plate.

[0488] <Operation requirements>

[0489] The motherboard is sheared and meets the maximum shear margin (SSmax) and minimum shear margin (SSmin) requirements as much as possible (complete shearing)

[0490] The trimming amount on the operating side and the transmission side should be as uniform as possible.

[0491] Even if the trimming amount of the steel plate does not meet the SSmax or SSmin requirements, it is better to complete the trimming of one side rather than leaving the steel plate blank.

[0492] (1)DSS cannot cut this steel plate → the steel plate passes directly

[0493] (2) Determine the trimming amount of the steel plate in the following order:

[0494] (2-1) Cutting position setting

[0495] Make the center line of the widest finished board coincide with the center line of the effective width of the motherboard.

[0496] (2-2) If the trimming amount is less than SSmin --> it is called "Insufficient trimming amount (width check)"

[0497] (2-3) If the trimming amount on both sides exceeds SSmax --> it is called "Trimming amount exceeds (both sides)"

[0498] (2-4) If only the trimming amount on the operating side exceeds SSmax, the shearing position will be moved toward the operating side to find a position that can meet the requirements of both SSmax and SSmin.

[0499] If this position can be found --> it is called "cuttable (after moving)"

[0500] If it cannot be found --> it is called "Cutting amount exceeds (operating side)"

[0501] (2-5) If only the cutting amount on the transmission side exceeds SSmax, the shearing position will be moved toward the transmission side to find a position that can meet the requirements of SSmax and SSmin at the same time.

[0502] If this position can be found --> it is called "cuttable (after moving)"

[0503] If it cannot be found --> it is called "Cutting amount exceeds (drive side)"

[0504] (2-6) If the trimming amount on both sides is less than Ssmax --> it is called "cuttable (no need to move)"

[0505] (3) “Determination of insufficient trimming amount”

[0506] In the "Insufficient trimming (width inspection)" in (2) above, the insufficient trimming will be checked. The trimming amount of the shears on the operating side is made to meet the SSmin requirement. In this case, the trimming amount is checked according to the maximum product width within the entire length of the motherboard. The trimming amount inspection is the same as (2-2), (2-3), (2-4) and (2-5). The test results are similar to those in (2), as follows:

[0507] "Insufficient trimming amount (Insufficient inspection)", "Excessive trimming amount (both sides)"

[0508] "Cutting edge exceeds (operating side)", "Cutting edge exceeds (transmission side)"

[0509] "Can be cut (after moving)", "Can be cut (without moving)"

[0510] (4) Shearing machine settings when the trimming amount is insufficient (insufficient detection)

[0511] For steel plates that are determined to have insufficient trimming (inadequate inspection) after the judgment according to (3), it is necessary to determine whether the trimming exceeds SSmax. DSS and SS are set based on the inspection results.

[0512] a) Except the following b), c), d)

[0513] Trimming line on the operating side: The trimming amount on the operating side meets SSmin

[0514] DSS opening width = maximum product width

[0515] SS opening width = maximum product width on the operating side

[0516] (Split line = trimming line on the operating side + maximum finished plate width on the operating side) (if splitting is required)

[0517] b) Excessive trimming (transmission side)

[0518] Cutting edge line on the transmission side: located at SSmax

[0519] Trimming line on the operating side: set according to (3) (judgment of insufficient trimming amount)

[0520] DSS opening width = distance between two cutting lines

[0521] SS opening width = maximum product width on the operating side

[0522] (Split line = trimming line on the operating side + maximum finished plate width on the operating side) (if splitting is required)

[0523] c) Trimming amount exceeds (operating side)

[0524] Trimming line on the operating side: at SSmax

[0525] Trimming line on the transmission side: set according to (3) (judgment of insufficient trimming amount)

[0526] DSS opening width = distance between two cutting lines

[0527] Splitting line: set according to (3) (determination of insufficient trimming amount)

[0528] SS opening width = the distance between the trimming line and the splitting line on the operating side (if splitting is required)

[0529] d) Excess trimming (on both sides)

[0530] Cutting edge line on the transmission side: located at SSmax

[0531] Trimming line on the operating side: at SSmax

[0532] DSS opening width = distance between two cutting lines

[0533] Splitting line: set according to (3) (determination of insufficient trimming amount)

[0534] SS opening width = the distance between the trimming line and the splitting line on the operating side (if splitting is required)

[0535] (5) Setting in case of “excess trimming amount”

[0536] Based on the judgment results of (2) "edge trimming amount judgment" and (3) "edge trimming amount insufficient judgment", DSS and SS are set for the "edge trimming amount excessive" steel plate.

[0537] In the following cases, "Cutting amount exceeds (both sides)", "Cutting amount exceeds (operating side)" and "Cutting amount exceeds (transmission side)" determine whether the edge of the steel plate can be completely cut.

[0538] If the trimming cannot be completed, the steel plate is directly cut or partially cut.

[0539] a) Shear setting for complete trimming

[0540] 1) The side that exceeds the maximum trimming amount SSmax is trimmed according to SSmax (complete trimming).

[0541] 2) If the center line of the maximum width product coincides with the center line of the effective width of the mother plate, the edge of the steel plate whose trimming amount does not exceed SSmax will be sheared.

[0542] 3) If the center line of the maximum width product coincides with the center line of the effective width of the motherboard, the splitting line is determined (if splitting is required)

[0543] b) In case of partial shearing (complete shearing is not possible)

[0544] 1) The side that exceeds the maximum trimming amount SSmax is trimmed according to SSmax (partial trimming).

[0545] 2) If the center line of the maximum width product coincides with the center line of the effective width of the mother plate, the edge of the steel plate whose trimming amount does not exceed SSmax will be sheared.

[0546] 3) If the center line of the product with the largest width coincides with the center line of the effective width of the motherboard, the splitting line (if splitting is required) will be determined.

[0547] (Note) When the DSS operating station is unmanned, the steel plate will pass directly even if full trimming is possible.

[0548] According to the present invention, a method and system for identifying and alarming insufficient width of rough edge plate before bilateral shearing on the shear line in the production process of medium and thick plates is provided. The method and system are used for identifying and alarming insufficient width of rough edge plate on the shear line in the case where there is no shear line or the steel plate plane shape detection device PSG is unavailable, and there is no way to know whether the width of the uncut rough edge plate meets the contract requirements; and the method and system are used for identifying and alarming insufficient width of rough edge plate on the shear line in the case where the width of rough edge plate before bilateral shearing is insufficient due to rolling deviation of the rolling line, and insufficient width of rough edge plate cannot be discovered in time.

[0549] According to the present invention, the steel plate is centered using a centering device. Based on the uncut width information sent to the electrical basic control system L1 by the shearing line process control system L2 of the medium and heavy plate production line, the position of the double-sided shearing laser scriber is adjusted so that the distance between the two laser lines equals the uncut width. This laser scriber can thus easily determine whether the uncut width of the plate before double-sided shearing meets the standard. If the width is insufficient, the plate is promptly removed from production and processed, preventing unqualified steel plates from being delivered to the user.

Claims

1. A method for identifying and alarming insufficient width of rough edged plate at the shearing line of medium and heavy plate, applicable to the shearing line L2 optimized shearing mathematical model of the medium and heavy plate shearing system, characterized in that: This method is used in situations where there is no steel plate plane shape detection device PSG or the steel plate plane shape detection device PSG cannot be used, and it can identify and alarm the insufficient width of the rough edge plate before double-sided shearing caused by rolling deviation of the rolling line, etc. The alarm method comprises the following steps: 1) Double-edge / split shear calculation program in the optimized shear mathematical model is set for double-edge shearing. When a steel plate plane shape detection device PSG is provided on the shear line, the program module is used to determine the status of the plane shape detection device PSG and the width of the steel plate based on the plate shape coordinate data detected by the steel plate plane shape detection device PSG and the steel plate defects detected by the ultrasonic flaw detector UST; 2) When the PSG status is confirmed to be unavailable and the rough edge plate needs to be double-sided sheared, the medium and heavy plate production line shearing line process control system L2 sends the rough edge plate contract width data to the electrical basic control system L1 through the production organization control system L3. 3) Set up a magnetic head centering and positioning device to center and position the steel plate through the basic control system L1; 4) Set up the double-sided shear laser scriber and adjust it so that the distance between the two laser lines is equal to the contract width of the rough edge board. Use laser marking to judge whether the width of the rough edge board meets the standard. 5) If the width is insufficient, an alarm will be issued in time and the plate will be taken offline to avoid sending medium and thick plates with substandard rough edge width to users.

2. The method for identifying and alarming insufficient width of rough edge of medium and thick plate shearing line according to claim 1 is characterized in that ； Based on the plate shape coordinate data detected by the steel plate plane shape detection device PSG and the steel plate defects detected by the ultrasonic flaw detector UST, the shear model optimization process is as follows: Step 1). Start by waiting for new steel plates to be calculated. If yes, the steel plate is calculated and processed. At the same time, after determining the event type, the PDI plan data is read; Event category refers to the steel plate tracking event code sent by L1 electrical automation to L2, including: 100-ordinary plate, 110 received PSG results, 890 received UST results, 900-rough cut change, etc. If the PDI plan data is read successfully, enter the basic shear data calculation, If the PDI plan data reading fails, it will enter the error data management library; Step 2). Enter the basic shear data calculation. If the basic shear data calculation is successful, enter the PSG data reading. If the basic shear data calculation fails, the error data management library will be entered; Step 3). Enter PSG data reading, read PSG data, and perform temperature conversion. Determine whether the steel plate is a normal plate or a sickle-bent steel plate; Ordinary plates refer to steel plates other than sickle-bent plates, including trimmed plates and rough-edged plates; If the steel plate is judged to be an ordinary plate, the following procedures will be entered in sequence: Steel plate cutting head / tail calculation → cutting head and random length calculation → double-sided cutting / splitting cutting calculation → cut-to-length and random width calculation → drawing to display cutting results and UST performance; Step 4). If errors are displayed in the calculation of steel plate head / tail cutting, head cutting and random length calculation, double-sided cutting / splitting cutting calculation, and cut-to-length and random width calculation, the calculations will be entered into the error data management library respectively; Step 5). In addition, rough cut change calculations can be performed as needed, and after updating the PDI record, the error data management library can be entered; The data in the error data management library returns to the starting stage, waiting to enter the new steel plate calculation program. Data reading failure means that the data is incomplete.

3. The method for identifying and alarming insufficient width of rough edge of medium and thick plate shearing line according to claim 2 is characterized in that ； Based on the plate shape coordinate data detected by the steel plate plane shape detection device PSG and the steel plate defects detected by the ultrasonic flaw detector UST, the shear setting values ​​of each shearing machine, including the crop shear (CS), double-sided / split shear (DSS / SS), and cut-to-length shear (DS), are calculated.

4. The method for identifying and alarming insufficient width of rough edge of medium and thick plate shearing line according to claim 3 is characterized in that ； The shear settings for double-edged / split shears related to the rough edge width include: PLATE_ID plate number / / used to identify the steel plate, BYPASS_FLAG_DSS Double-sided pass mark / / used to identify rough edge board, PLATE_WID plate width / / Get the theoretical width of the rolled steel plate, CUT_WID_DSS bilateral cutting width / / Bilateral cutting width calculated by the model.

5. A method for identifying and alarming insufficient width of rough edged plate at shearing line of medium and thick plate according to claim 1 or 2, characterized in that ； Based on the PSG measurement data, the CS shear point calculation is optimized, taking into account the operating constraints, the plate shape (normal plate or sickle bent plate) and the plate temperature, and the cutting head / tail points as well as the rough cutting points and the cut-to-length segmentation points are set.

6. A method for identifying and alarming insufficient width of rough edged plate at shearing line of medium and thick plate according to claim 1 or 2, characterized in that ； Optimize DSS and SS set point calculation: calculate the shear point of double-sided shear / split shear according to the steel plate shape and temperature after head and segment shearing.

7. A method for identifying and alarming insufficient width of rough edged plate at shearing line of medium and thick plate according to claim 1 or 2, characterized in that ； Optimized DS set point calculation: Calculate the shear point for cut-to-length shearing based on the plate shape and temperature after double-sided shearing and split shearing.

8. The method for identifying and alarming insufficient width of rough edged plate at shearing line of medium and thick plate according to claim 1, characterized in that: In the absence of plate plane shape data, that is, when PSG is unavailable, Calculation of shear setpoints for DSS and SS: (1) Set the shearing machine according to the contract data obtained from L2: Object: rough edge board—— The contract width value of the steel plate was corrected for width tolerance and converted from hot to cold during the initial calculation stage of the model; When the steel plate is about to enter the DSS, the corrected contract width value of the steel plate is sent to the electric double-sided shear basic control system L1 via telex, and L1 sets the width of the laser marking device to the correct position; After the steel plate is magnetically aligned, the operator will determine whether the width is insufficient based on the laser marking position. Qualified steel plates will pass through the shearing machine without being cut and proceed to the DS sizing process. Unqualified steel plates will be downgraded or scrapped and hoisted to offline stacks for further processing. (2) Except for the plate assembly pattern A, the rough edge plates or the plates that cannot be split will pass through the shearing machine directly without being sheared; (3) Except for the above cases, the steel plates are sheared according to the following setting values: DSS opening width = maximum product width SS opening width = maximum product width on the operating side (when splitting is required), Here, "plate assembly mode A" refers to a single-row plate assembly mode, in which the sub-plates are arranged in sequence on the large plate, without the need to use a splitting shear to cut the steel plate in half in the width direction.

9. A recognition and alarm system for insufficient width of rough edge plate before shearing of medium and heavy plates. This system is used in situations where there is no plane shape detection device or the steel plate plane shape detection device PSG cannot be used. It can identify and alarm insufficient width of rough edge plate before double-sided shearing due to rolling deviation of the rolling line, etc. It is characterized by: The alarm system comprises: Optimized shearing mathematical model for determining the plane shape and width of steel plates; Optimize the shearing mathematical model to set up the double-edge / split shearing calculation program module. When the PSG status is confirmed to be unavailable and the rough-edged plate needs to be double-edge sheared, the rough-edged plate contract width data is sent to the electrical basic control system L1 through the medium and heavy plate production line shearing line process control system L2. The magnetic head centering positioning device and double-sided shear laser scriber installed on the shearing line of the medium and thick plate shearing system can center the steel plate through the basic control system L1, adjust the double-sided shear laser scriber, and judge whether the width of the rough edge plate meets the standard through laser marking. Therefore, if the width is insufficient, an alarm will be issued in time and the plate will be taken offline to avoid the delivery of medium and thick plates with substandard rough edge width to users.

10. The identification and alarm system for insufficient width of rough edge of medium and thick plate shearing line according to claim 9, characterized in that: When a steel plate plane shape detection device PSG for detecting plate shape coordinate data is provided on the shear line, the shear model optimization process is as follows based on the plate shape coordinate data detected by the steel plate plane shape detection device PSG and the steel plate defects detected by the ultrasonic flaw detector UST: Start, wait for new steel plates to be calculated, If yes, the steel plate is calculated and processed. At the same time, after judging the event type, the PDI, i.e. the planned data, is read; If the PDI plan data is read successfully, enter the basic shear data calculation, If the PDI plan data reading fails, it will enter the error data management library; Enter the basic shear data calculation. If the basic shear data calculation is successful, enter the PSG data reading. If the basic shear data calculation fails, the error data management library will be entered; Enter PSG data reading, read PSG data, and perform temperature conversion. Determine whether the steel plate is a normal plate or a sickle-bent steel plate; Ordinary plates refer to steel plates other than sickle-bent plates, including trimmed plates and rough-edged plates. If the steel plate is judged to be an ordinary plate, the following procedures will be entered in sequence: Steel plate cutting head / tail calculation → cutting head and random length calculation → double-sided cutting / splitting cutting calculation → cut-to-length and random width calculation → drawing to display cutting results and UST performance; If errors are displayed in the calculation of steel plate head / tail cutting, head cutting and random length calculation, double-sided cutting / splitting cutting calculation, and cut-to-length and random width calculation, they will be entered into the error data management library respectively; If the steel plate is judged to be a sickle-bent steel plate after the temperature conversion, the sickle-bent steel plate calculation is performed; In addition, rough cutting change calculations can be performed as needed, and after updating the PDI record, the error data management library can be entered; The data in the error data management library returns to the starting stage, waiting to enter the new steel plate calculation program.

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