Method and related equipment for preventing plate blank from clamping steel

Abstract

The invention discloses a method and related equipment for preventing plate blank steel jamming, and relates to the technical field of hot rolling procedures, the method comprises the steps that plate blank head width parameters and a strip body width mean value of each rough rolling pass are obtained; under the condition that a vertical roll width reduction pass exists after the current rough rolling pass, the belt body width reduction amount, the maximum width reduction amount and the width reduction amount of the widest position of the head corresponding to the vertical roll width reduction pass are obtained; judging whether the slab head width parameter is valid based on the head width standard deviation; under the condition that the plate blank head width parameter is effective and the width reduction amount of the widest position of the head is larger than the maximum width reduction amount, the head vertical roll gap compensation value is determined; and based on the head vertical roll gap compensation value, the short-stroke roll gap value of the vertical roll width reduction pass is adjusted to adapt to the plate blank head width exceeding state. According to the method, the vertical roll steel clamping accident is effectively prevented when the plate blank is wide, the production interruption risk is reduced, and the rolling efficiency and the equipment safety are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hot rolling process, and particularly relates to a method for preventing slab sticking and related equipment. BACKGROUND

[0002] In the hot rolling production process, the width control is realized through the cooperation of the width setting mill and the edger mill, and the edger mill is widely used to control the width and edge shape of the slab. However, due to the difference in the flowability of the head and tail metals of the slab, the head and tail narrow size problem is prone to occur during rolling.

[0003] The prior art usually adopts the short stroke function to compensate for the narrow size, but when the short stroke parameter is set too large, the roll gap over-compensation will cause the head and tail width to exceed the standard (width over). Once the head and tail width exceeds, the slab may be stuck in the roll gap during the subsequent edging rolling due to the width over-limit, which will cause the slab sticking accident and seriously affect the production continuity and equipment stability. Therefore, there is an urgent need for a method for preventing slab sticking to solve the above-mentioned technical problems. SUMMARY

[0004] A series of simplified concepts are introduced in the summary section, which will be further described in detail in the specific embodiment section. The summary section of the present application does not mean to attempt to limit the key features and necessary technical features of the claimed technical solution, and even less to determine the protection scope of the claimed technical solution.

[0005] In a first aspect, the present application provides a method for preventing slab sticking, the method comprising:

[0006] obtaining the slab head width parameters and the strip width average of each rough rolling pass, wherein the slab head width parameters include the head width average, the head width maximum value and the head width standard deviation;

[0007] when there is an edger width reduction pass after the current rough rolling pass, obtaining the strip width reduction amount, the maximum width reduction amount and the head widest position width reduction amount corresponding to the edger width reduction pass;

[0008] determining whether the slab head width parameters are valid based on the head width standard deviation;

[0009] when the slab head width parameters are valid and the head widest position width reduction amount is greater than the maximum width reduction amount, determining the head edger roll gap compensation value based on the head width maximum value, the strip width average, the strip width reduction amount and the maximum width reduction amount;

[0010] adjusting the short stroke roll gap value of the edger width reduction pass based on the head edger roll gap compensation value to adapt to the slab head width over-limit state.

[0011] In some embodiments, determining whether the slab head width parameter is valid based on the head width standard deviation includes:

[0012] comparing the head width standard deviation with a preset standard deviation threshold range;

[0013] determining that the slab head width parameter is valid if the head width standard deviation is within the preset standard deviation threshold range;

[0014] determining that the slab head width parameter is invalid if the head width standard deviation is beyond the preset standard deviation threshold range.

[0015] In some embodiments, in a case where the slab head width parameter is valid and the head widest position reduction amount is greater than the maximum reduction amount, determining the head stand roll gap compensation value based on the head width maximum value, the strip width average value, the strip reduction amount, and the maximum reduction amount includes:

[0016] generating a first difference value based on a difference operation result of the head width maximum value and the strip width average value in a case where the slab head width parameter is valid and the head widest position reduction amount is greater than the maximum reduction amount;

[0017] generating a second difference value based on a difference operation result of the maximum reduction amount and the strip reduction amount;

[0018] determining the head stand roll gap compensation value based on a difference operation result of the first difference value and the second difference value.

[0019] In some embodiments, the head widest position reduction amount is determined based on the head width maximum value, the strip width average value, and the strip reduction amount.

[0020] In some embodiments, adjusting the short stroke roll gap value of the stand reduction pass based on the head stand roll gap compensation value to adapt to the slab head width overrunning state includes:

[0021] obtaining an initial head short stroke roll gap value of the stand reduction pass;

[0022] determining a target roll gap value based on the head stand roll gap compensation value and the initial head short stroke roll gap value;

[0023] adjusting the short stroke roll gap value of the stand reduction pass to the target roll gap value to adapt to the slab head width overrunning state.

[0024] In some embodiments, obtaining the slab head width parameter and the strip width average value of each rough rolling pass includes:

[0025] collecting initial width data of the slab head and the strip width average value;

[0026] The initial width data is filtered based on a sliding window algorithm to obtain a head width mean value, a head width maximum value and a head width standard deviation, which are used as the slab head width parameters.

[0027] The slab head width parameters and the strip width mean value are stored for subsequent pass calling.

[0028] In some embodiments, after adjusting the short stroke roll gap value of the edger pass, the method further comprises:

[0029] The rolling load and the vibration amplitude of the edger mill are monitored.

[0030] If the rolling load is greater than a preset safe load threshold or the vibration amplitude is greater than a preset safe vibration threshold, the edger mill is stopped and an alarm signal is generated.

[0031] In a second aspect, the application provides a device for preventing slab jamming, which comprises:

[0032] A rough rolling pass data acquisition unit is configured to acquire slab head width parameters and strip width mean values of each rough rolling pass, wherein the slab head width parameters include a head width mean value, a head width maximum value and a head width standard deviation.

[0033] A reduction amount data acquisition unit is configured to acquire a strip reduction amount, a maximum reduction amount and a head widest position reduction amount corresponding to the edger reduction pass when the edger reduction pass exists after the current rough rolling pass.

[0034] A parameter validity determination unit is configured to determine whether the slab head width parameters are valid based on the head width standard deviation.

[0035] A roll gap compensation value determination unit is configured to determine a head edger roll gap compensation value based on the head width maximum value, the strip width mean value, the strip reduction amount and the maximum reduction amount when the slab head width parameters are valid and the head widest position reduction amount is greater than the maximum reduction amount.

[0036] A short stroke roll gap adjustment unit is configured to adjust a short stroke roll gap value of the edger reduction pass based on the head edger roll gap compensation value to adapt to the slab head width overrunning state.

[0037] In a third aspect, an electronic device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor is configured to implement the steps of the method for preventing slab jamming according to any one of the first aspect when executing the computer program stored in the memory.

[0038] In a fourth aspect, the application provides a computer readable storage medium having a computer program stored thereon, wherein the computer program is executable by a processor to implement the method for preventing slab jamming according to any one of the first aspect.

[0039] In summary, the present application collects the slab head width parameters (average value, maximum value, standard deviation) of the rough rolling pass and the strip width average value, combines the set reduction amount and the maximum reduction amount of the edger reduction pass, dynamically calculates the head edger roll gap compensation value, and adjusts the short stroke roll gap based on the effectiveness determination. When the reduction amount of the widest position of the head exceeds the maximum reduction capacity of the edger, the compensation value accurately corrects the roll gap to avoid overloading of the rolling force caused by the width overrun. The standard deviation check ensures data reliability, and the real-time adjustment mechanism effectively prevents the edger from being stuck with steel when the slab width exceeds, reduces the risk of production interruption, and improves rolling efficiency and equipment safety. BRIEF DESCRIPTION OF DRAWINGS

[0040] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are merely illustrative and are not considered to be limiting in any sense. Throughout the drawings, like reference numerals refer to similar parts. In the drawings:

[0041] Figure 1 A method for preventing slab sticking provided by an embodiment of the present application is shown in the flowchart;

[0042] Figure 2 A device structure diagram for preventing slab sticking provided by an embodiment of the present application is shown in the flowchart;

[0043] Figure 3 An electronic device structure diagram for preventing slab sticking provided by an embodiment of the present application is shown in the flowchart. DETAILED DESCRIPTION

[0044] The terms "first", "second", "third", "fourth" and the like in the description and in the claims of the present application, if any, of the above-described drawings (if any) are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of the terms so construed can interchange, under appropriate circumstances, to refer to a similarly differentiated object. Moreover, the terms "comprise", "comprising", "have", "having", "include", "including", and "contains", "containing" as well as any variations thereof are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or apparatus that comprises a list of steps or units not necessarily limited to those explicitly listed, but can include other steps or units not expressly listed or inherent to such process, method, product, or apparatus. The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all embodiments.

[0045] Please refer to Figure 1A method for preventing slab sticking provided by the embodiment of the present application, and the method can specifically include the following steps.

[0046] In S110, slab head width parameters and strip width average value of each rough rolling pass are acquired, wherein the slab head width parameters include head width average value, head width maximum value and head width standard deviation.

[0047] Exemplarily, in the hot rolling rough rolling process, the core purpose of acquiring the slab head width parameters and the strip width average value of each pass is to dynamically monitor the actual fluctuation characteristics of the slab head width, so as to provide a data basis for the roll gap compensation of the subsequent edger reducing pass. The head width average value reflects the average width level of the slab head, the maximum value represents the extreme width overrunning state, and the standard deviation is used to evaluate the stability and measurement effectiveness of the width data. The strip width average value is used as a reference value to distinguish the difference between the head width overrunning and the normal width of the strip body. Through continuous acquisition and storage of multi-pass data, dynamic representation of the slab head width state is formed, and real-time basis is provided for judging whether to trigger the roll gap compensation mechanism.

[0048] The principle of this step is that in the rough rolling process, the slab head is prone to local width abnormalities (such as width overrunning) due to the metal flow characteristics, and the preset value of the short stroke parameter cannot completely adapt to the actual fluctuation. By comparing the head width maximum value with the strip average value, the width overrunning amplitude can be quantified; the standard deviation check excludes invalid data caused by measurement noise or abnormal interference, ensuring the reliability of the subsequent calculation of the compensation value. This process converts the physical deformation characteristics of the slab head into quantifiable parameters, and builds a key data link for the width control from static preset to dynamic adaptation.

[0049] In S120, in the case that there is an edger reducing pass after the current rough rolling pass, the strip reducing amount, the maximum reducing amount and the head widest position reducing amount corresponding to the edger reducing pass are acquired.

[0050] Exemplarily, in the edger reducing pass, the core of acquiring the strip reducing amount and the maximum reducing amount is to determine the reducing capacity boundary of the current pass. The strip reducing amount reflects the preset reduction target of the slab overall width by the process model, while the maximum reducing amount is determined by the mechanical strength and rolling force of the equipment, and represents the upper limit of the reducing capacity of the edger in the pass. The head widest position reducing amount (i.e. head width overrunning amount) is formed by adding the strip reducing amount to the difference between the head width maximum value and the strip average value of the current pass, and is used to quantify the additional increment of the head width overrunning to the reducing demand.

[0051] The logic of this step is that the actual reduction of the vertical roll needs to meet the target reduction of the strip body and the compensation demand of the head width over. When the reduction amount at the widest position of the head exceeds the maximum reduction amount, it indicates that the pre-set reduction capacity cannot cover the additional rolling load caused by the head width over, and there is a risk of steel jamming. By comparing the two parameters, the roll gap increment that needs to be compensated can be identified in advance, providing a decision basis for dynamic adjustment, so as to establish a balance relationship between process constraints and equipment limits.

[0052] S130, determining whether the slab head width parameter is valid based on the head width standard deviation;

[0053] For example, the core of determining the validity of the parameter based on the head width standard deviation is to screen out reliable data that conforms to the statistical law, and to avoid misjudgment caused by measurement abnormalities or local fluctuations. The head width standard deviation reflects the dispersion degree of the width of each point of the slab head in the same pass. If the standard deviation exceeds the pre-set interval, it indicates that the width data has a violent fluctuation or measurement interference, and the mean value and the maximum value collected at this time may not truly represent the overall width state of the head, so such abnormal data needs to be excluded to ensure the accuracy of subsequent compensation calculation.

[0054] As a statistical index, the standard deviation can quantify the concentration and stability of the width data. When the standard deviation is within a reasonable threshold range, it indicates that the head width fluctuation conforms to the process characteristics, and at this time the head width parameter is reliable. If the standard deviation is abnormally large, it may be caused by sensor failure, slab surface defects or rolling instability, and the compensation logic needs to be suspended to avoid roll gap adjustment based on incorrect data, so as to maintain the robustness of the control system.

[0055] S140, in the case that the slab head width parameter is valid and the reduction amount at the widest position of the head is greater than the maximum reduction amount, determining the roll gap compensation value of the head vertical roll based on the head width maximum value, the strip width mean value, the strip reduction amount and the maximum reduction amount;

[0056] For example, in the case that the head width parameter is valid and the reduction demand exceeds the limit, the core of determining the roll gap compensation value is to quantify the difference between the head width over amplitude and the vertical roll reduction capacity. The difference between the head width maximum value and the strip mean value is added to the model of the strip reduction amount, forming the actual reduction demand at the widest position of the head. The maximum reduction amount represents the process limit of the current pass of the vertical roll. By comparing the difference between the actual demand and the equipment limit, the roll gap increment that needs to be compensated is dynamically calculated to offset the rolling force overload risk caused by the width over.

[0057] The essence of the above content is to convert the reduction load that exceeds the equipment capacity into a roll gap increment, so that the vertical roll gap actively adapts to the head width over mode and avoids steel jamming caused by forced reduction. This process integrates process constraints and real-time data to realize dynamic redistribution of rolling capacity.

[0058] S150. Based on the roll gap compensation value of the head vertical roller, adjust the short-stroke roll gap value of the vertical roller width reduction pass to adapt to the over-width state of the slab head.

[0059] For example, in scenarios where the slab's head width exceeds and compensation is required, the core mechanism for adjusting the short-stroke roll gap is to dynamically modify the preset vertical roll gap value to proactively adapt to the actual deformation of the head width. The head vertical roll gap compensation value represents the difference between the width excess and the vertical roll's remaining width reduction capacity. When this value is added to the initial short-stroke roll gap value, the effect is to increase the vertical roll gap opening, relieve the rolling pressure caused by the excessive head width, and thus avoid interference contact between the slab and the rolls.

[0060] The incremental adjustment of the short-stroke roll gap directly affects the physical roll gap of the vertical mill, dynamically matching the roll gap opening to the actual width of the slab head. By linearly superimposing the compensation value on the preset roll gap, excess width that originally exceeds the width reduction capacity of the vertical rolls is converted into a roll gap increment, offsetting the width interference of over-wide slabs as they enter the vertical rolls. This allows smooth rolling of over-wide slabs without exceeding the rolling force limit, preventing the occurrence of steel jamming chain reactions.

[0061] In summary, in the embodiment of the present application, by dynamically collecting the actual width parameters of the slab head and the mean width of the strip during the roughing pass, combined with the process parameters of the vertical roller width reduction pass, a roll gap adaptive compensation mechanism driven by real-time data is constructed. Its core benefits are: verifying the validity of the data through the standard deviation of the head width, eliminating measurement noise and abnormal interference, and ensuring the reliability of the compensation logic; when the width reduction demand at the widest position of the head exceeds the maximum width reduction capacity of the vertical roller, the roll gap compensation value is accurately calculated and dynamically superimposed on the short-stroke roll gap set value, so that the vertical roller roll gap actively adapts to the width excess shape of the slab head, avoiding rolling force exceeding the limit and steel jamming accidents caused by forced width reduction; at the same time, by linking the compensated roll gap adjustment with the rolling mill load safety monitoring, the adaptability of width control is improved while ensuring the stability of equipment operation. This solution deeply integrates process preset parameters with real-time rolling data, breaking through the limitations of traditional static compensation, and realizing closed-loop control of the entire process from monitoring, judgment to dynamic suppression of width excess risk, reducing the production accident rate and improving rolling efficiency.

[0062] In some examples, obtaining the slab head width parameter and the strip width average value of each rough rolling pass includes:

[0063] Collect the initial width data of the slab head and the average width of the strip body;

[0064] The initial width data is filtered based on the sliding window algorithm to obtain the head width mean, head width maximum and head width standard deviation as the slab head width parameters;

[0065] The slab head width parameters and the strip body width average are stored for subsequent calls.

[0066] Exemplarily, in the hot rough rolling process, the accurate acquisition of the slab head width parameter is the basis of dynamic compensation control. By deploying a laser range finder or an infrared width measuring device on both sides of the rolling line, the initial width data of the slab head and the average width of the strip body are collected in real time. The initial width data is the width sampling value of the slab head continuously distributed along the rolling direction, covering a specific area of the head; the average width of the strip body is the average width of the middle region of the slab in the current pass stable rolling stage. During the data collection process, the measuring device continuously scans at a fixed sampling frequency to ensure complete capture of the head width fluctuation and provide the original data basis for subsequent processing.

[0067] To eliminate measurement noise and abnormal point interference, a sliding window algorithm is used to filter the initial width data. The sliding window length is dynamically matched with the slab moving speed, and the window is updated frame by frame in the direction of the slab travel. In each window, the width sampling sequence is calculated by moving average to obtain the head width average, and the maximum value in the window is taken as the head width maximum, and the standard deviation of the data in the window is calculated as the head width dispersion index. This algorithm dynamically updates the window data, effectively suppresses transient interference signals, extracts the trend item reflecting the true width characteristics, and ensures the stability and reliability of the parameter calculation.

[0068] The slab head width parameter generated after filtering contains three key indicators: the head width average represents the overall width level of the head, which is used to evaluate the width overrunning trend; the head width maximum identifies the extreme state of the widest point of the head, which is directly related to the stand roll reduction compensation demand; the head width standard deviation quantifies the dispersion degree of the width data, which is used as a parameter validity criterion. The average width of the strip body is used as a reference value to distinguish the width difference between the head and the strip body. Through the above parameter combination, a multi-dimensional representation system of the slab head width state is constructed, providing a quantitative basis for the roll gap compensation of the stand roll reduction pass.

[0069] After completing the parameter calculation, the slab head width parameter and the average width of the strip body are stored in the real-time database or distributed storage system. The storage is indexed by the rough rolling pass number and the time stamp to ensure that the historical data can be quickly retrieved for the subsequent stand roll reduction pass. For example, when entering the n+1 pass stand rolling, the system automatically retrieves the head width parameter stored in the n pass, and performs compensation calculation combined with the process set value of the current pass. This data chain calling mechanism ensures the timeliness and consistency of the cross-pass parameter transmission, supporting the closed-loop control of dynamic roll gap adjustment.

[0070] In some examples, in the case that there is a stand roll reduction pass after the current rough rolling pass, the strip body reduction amount, the maximum reduction amount, and the head widest position reduction amount corresponding to the stand roll reduction pass are obtained, including:

[0071] Exemplarily, the acquisition of the strip width reduction amount is based on preset parameters of a rolling process model. Before the start of the stand reduction pass, the rolling mill secondary automation system retrieves the preset width reduction process parameters of the current pass from the process database, and the strip width reduction amount is the width reduction set value of the slab strip part (i.e. the non-head and tail area), the value of which is determined by the width control strategy in the rolling schedule. Specifically, according to the target finished product width, the cumulative width expansion amount of rough rolling and the stand roll gap setting algorithm, the strip width reduction amount required to be applied in the current stand pass is calculated. The parameter is transmitted to the basic automation system through the OPC protocol as the reference input value of the roll gap adjustment, ensuring that the strip width meets the process target.

[0072] The acquisition of the maximum width reduction amount depends on the equipment capability parameters of the stand rolling mill. The maximum allowable width reduction amount of the stand rolling mill is determined by the mechanical structure strength, the main motor torque limit and the rolling force safety threshold, and is stored in the equipment safety parameter database. In the preparation stage of the stand pass, the control system acquires the current roll wear amount, oil film bearing load margin and motor temperature rise data by real-time inquiry of the rolling mill state monitoring module, and dynamically corrects the static maximum width reduction amount parameter. For example, when the roll wear amount exceeds the preset threshold, the maximum width reduction amount is proportionally reduced by 5%-10% to prevent the risk of overload due to equipment performance degradation. The parameter serves as a rigid constraint for the width reduction operation, ensuring that the rolling process is within the equipment safety window.

[0073] The calculation of the width reduction amount at the widest position of the head is based on the slab head feature parameters collected in the rough rolling pass. According to the stored maximum head width and the average strip width, the head width excess amount is first calculated as the maximum head width minus the average strip width. In combination with the strip width reduction amount, the width reduction amount at the widest position of the head is equal to the head width excess amount plus the strip width reduction amount. This calculation logic reflects the additional width reduction amount that needs to be applied to the head width excess area during stand rolling, and its physical meaning is that on the basis of the standard width reduction of the strip, further width deviation caused by the head width excess needs to be eliminated to make the head width converge to the target range.

[0074] The above-mentioned parameters are verified in coordination through a real-time data bus. At the moment of activation of the stand width reduction pass, the control system synchronously reads the strip width reduction amount, the maximum width reduction amount and the width reduction amount at the widest position of the head to construct a width reduction amount decision matrix. When the width reduction amount at the widest position of the head is greater than the maximum width reduction amount, the roll gap compensation mechanism is triggered, and at this time the actual width reduction requirement exceeds the equipment capability, so the short stroke setting needs to be adjusted through the head stand roll gap compensation value. This parameter acquisition mechanism dynamically integrates the process setting, equipment limit and real-time detection data to form a closed-loop control condition, ensuring the accuracy of the width excess compensation and the safety of the equipment.

[0075] In some examples, based on the head width standard deviation, it is determined whether the slab head width parameter is valid, including:

[0076] comparing the head width standard deviation with a preset standard deviation threshold range;

[0077] If the head width standard deviation is within the preset standard deviation threshold range, it is determined that the slab head width parameter is valid.

[0078] If the head width standard deviation exceeds the preset standard deviation threshold range, it is determined that the slab head width parameter is invalid.

[0079] For example, the determination logic of the head width standard deviation is based on the principle of statistical quality control. The preset standard deviation threshold range is determined by analyzing historical rolling data, and the lower limit value ensures that the measurement data has sufficient sensitivity, and the upper limit value is set according to the equipment measurement error tolerance and process stability. The threshold range is stored in the process parameter database and can be dynamically adjusted according to the rolling steel grade, specification and sensor accuracy. During the determination, the current pass head width standard deviation σ is real-time retrieved through the data bus, and compared with the preset threshold interval [σ_min, σ_max] to form the data basis of the validity criterion.

[0080] The comparison process of the standard deviation threshold is executed by the logic processing unit of the control system. When the head width standard deviation σ satisfies σ_min≤σ≤σ_max, it is determined that the slab head width parameter is valid, indicating that the head width fluctuation is within the normal process tolerance range, and the measurement data is not disturbed by abnormal interference. At this time, the head width mean value, maximum value and standard deviation σ are all marked as valid data, allowing them to enter the subsequent roll gap compensation calculation process. This determination mechanism excludes abnormal discrete data caused by sensor transient failure, slab surface oxide scale shedding or head warping, ensuring the reliability of the compensation decision.

[0081] In the case of valid parameters, the system stores the head width parameters associated with the strip body width mean value in the real-time database and generates a data validity identifier. Valid data is stored encrypted by pass number and time stamp for subsequent stand roll reduction pass calls. For example, when entering the nth pass of the stand roll, the valid head width parameters of the n-1th pass are automatically retrieved as input variables for roll gap compensation calculation. This mechanism, through the synergy of data validity checking and storage, builds a closed-loop control data integrity protection system.

[0082] If the head width standard deviation σ exceeds the preset threshold range, it is determined that the slab head width parameter is invalid, triggering the data abnormality processing mechanism. Invalid data is marked as unusable and is prohibited from participating in roll gap compensation calculation. The system automatically switches to the redundant control mode, using the valid parameters of the previous pass or the preset values of the process model for alternative calculation to ensure rolling continuity. In addition, the standard deviation overrun event is recorded in the fault log for subsequent equipment inspection and process optimization analysis, forming a positive feedback link for quality control.

[0083] In some examples, in a case that the slab head width parameter is valid and the head widest position reduction amount is greater than the maximum reduction amount, determining a head roll stand roll gap compensation value based on a difference operation result of the head width maximum value and the strip width average value, includes:

[0084] In a case that the slab head width parameter is valid and the head widest position reduction amount is greater than the maximum reduction amount, generating a first difference value based on a difference operation result of the head width maximum value and the strip width average value;

[0085] Generating a second difference value based on a difference operation result of the maximum reduction amount and the strip reduction amount;

[0086] Determining the head roll stand roll gap compensation value based on a difference operation result of the first difference value and the second difference value.

[0087] For example, the generation of the first difference value is based on the quantitative calculation of the slab head width overage. According to the maximum value in the valid head width parameter and the strip width average value, a difference operation is performed to generate a first difference value representing the actual head width overage. The difference reflects the overage of the slab head relative to the normal width of the strip, which is related to the additional head width overage that needs to be eliminated by the roll reduction pass, and is the original input variable of the roll gap compensation calculation.

[0088] The second difference value represents the remaining margin of the roll reduction capacity. The second difference value is generated by a difference operation of the maximum reduction amount and the strip reduction amount. This calculation logic explicitly indicates the reduction capacity of the roll that is not occupied in the current pass, which defines the additional reduction space that the device can withstand after completing the standard reduction of the strip, and serves as a constraint boundary for the compensation value calculation.

[0089] The determination of the head roll stand roll gap compensation value is based on the dynamic balance between the overage demand and the remaining capacity. The first difference value and the second difference value are subjected to a second difference operation to obtain the compensation value. The physical meaning of the compensation value is that when the head width overage exceeds the remaining reduction capacity of the roll, the width amount released by the roll gap needs to be increased, and the value is equal to the excess reduction demand. This calculation model converts the conflict between process demand and device limit into an executable roll gap adjustment amount.

[0090] In some examples, based on the head roll stand roll gap compensation value, adjusting the short stroke roll gap value of the roll reduction pass to adapt to the slab head width overage state, includes:

[0091] Obtaining an initial head short stroke roll gap value of the roll reduction pass;

[0092] Determining a target roll gap value based on the head roll stand roll gap compensation value and the initial head short stroke roll gap value;

[0093] Adjusting the short stroke roll gap value of the roll reduction pass to the target roll gap value to adapt to the slab head width overage state.

[0094] The initial head short stroke roll gap value is obtained based on a preset model of a rolling process. The second automatic system of the edger mill retrieves the preset initial head roll gap value of the current pass from a short stroke control parameter library, which is calculated according to the steel grade characteristics, target width and rolling force distribution strategy. The system reads the parameter in real time through the OPC communication protocol and verifies the matching of the parameter with the current pass equipment state, to ensure the accuracy and timeliness of the data call.

[0095] The calculation of the target roll gap value follows the compensation superposition principle. The head edger roll gap compensation value is algebraically added to the initial roll gap value to generate the target roll gap value. The physical meaning of the calculation model is that the compensation value is equal to the part of the head width excess that exceeds the remaining edging capacity of the edger, which is directly converted into an incremental adjustment amount of the roll gap opening. The roll gap opening is adapted to the actual width excess shape of the head of the slab.

[0096] The dynamic adjustment of the short stroke roll gap value is realized through a servo control system. The target roll gap value is issued to the edger hydraulic APC (automatic position control) system through a bus, to drive the hydraulic cylinder to execute roll gap adjustment with a precision of 0.01 mm. During the adjustment process, the hydraulic cylinder displacement sensor feeds back the actual roll gap value in real time, and performs PID closed-loop control with the target value, to ensure that the roll gap positioning accuracy is ≤±0.05 mm. The adjustment is completed 200-500 ms before the head of the slab enters the edger bite-in area, to ensure the timing matching.

[0097] In some examples, after adjusting the short stroke roll gap value of the edging pass of the edger, the method further comprises:

[0098] monitoring the rolling load and vibration amplitude of the edger mill;

[0099] if the rolling load is greater than a preset safe load threshold or the vibration amplitude is greater than a preset safe vibration threshold, controlling the edger mill to stop and generating an alarm signal.

[0100] In some examples, after adjusting the short stroke roll gap value of the edging pass of the edger, the rolling load and vibration amplitude are monitored in real time by pressure sensors and acceleration sensors integrated on the edger mill. The pressure sensors are installed at the edger bearing seat to directly measure the vertical load borne by the roll system during rolling; the acceleration sensors are fixed at key positions of the mill stand to collect vibration acceleration signals during the operation of the mill, and are converted into vibration amplitude values through integral operation. The sensor data is transmitted to the central control unit at a fixed sampling frequency to form a continuous set of running state monitoring data.

[0101] The preset safe load threshold and the preset safe vibration threshold are set based on the mechanical performance parameters and historical working condition data of the edger mill, for example, the safe load threshold is 120% of the rated load, and the safe vibration threshold is 0.5 mm / s 2The central control unit compares the monitoring data with the preset threshold in real time: if the rolling load exceeds the safe load threshold or the vibration amplitude exceeds the safe vibration threshold, it is determined that the edger mill is in an unsafe running state. At this time, the control unit immediately sends an emergency stop command to the mill drive system, cuts off the rolling power and starts the brake device; at the same time, an alarm signal containing the type of exception, the time stamp and the data curve is generated, which is pushed synchronously through the human-machine interface and the remote monitoring platform, and the operator is notified to intervene in the processing.

[0102] After triggering the stop and alarm, the system automatically records the rolling load, vibration amplitude and roll gap adjustment data within a set time window before and after the triggering time, forms a fault log and stores it in the database. The log is used for subsequent fault root cause analysis, such as determining whether the load is abnormal due to excessive roll gap compensation value or the vibration is excessive due to equipment mechanical wear. In addition, abnormal data can be fed back to the rolling process model to dynamically correct the preset safety threshold or optimize the roll gap compensation algorithm, improving the robustness of the system. For example, if the same compensation value triggers an alarm multiple times, the maximum width reduction setting value of the pass is automatically reduced to avoid repeated failures.

[0103] The technical solutions of the present application will be further described in detail through specific embodiments.

[0104] In the rough rolling process, a certain coiled strip steel is processed using a "1+5" rolling mode, i.e., one initial rough rolling pass is followed by five subsequent rolling passes. In the fourth pass, the width data of the head of the slab is collected in real time by a laser width gauge, and the maximum head width is measured to be 1320 mm, and the average width of the strip body is measured to be 1300 mm, which is used as a reference value.

[0105] The sixth pass is a stand roll width reduction pass. According to the rolling process model, the planned width reduction of this pass is 25 mm, i.e., the edger mill needs to reduce the width of the slab by 25 mm. At the same time, the maximum width reduction allowed for this pass is 30 mm, indicating the maximum width reduction capability that the edger mill can execute under the current working condition. At this time, the remaining width reduction capability of the edger is the maximum width reduction minus the planned width reduction, i.e., 30 mm minus 25 mm, which is 5 mm.

[0106] In the case of the fourth pass head width over (the maximum value of the head width exceeds the average value of the strip body), the head width over is calculated as the maximum value of the head minus the average value of the strip body, that is, 1320 mm minus 1300 mm, and the result is 20 mm. Since the head width over is 20 mm, which is greater than the remaining width reduction capacity of the edger roll of 5 mm, the compensation value of the head edger roll gap needs to be calculated. The compensation value is the head width over minus the remaining width reduction capacity, that is, 20 mm minus 5 mm, and the result is 15 mm. The initial short stroke roll gap value of the sixth pass is 3 mm, and the adjusted target roll gap value is the initial value plus the compensation value, that is, 3 mm plus 15 mm, and the result is 18 mm. By adjusting the short stroke roll gap to 18 mm, the edger mill provides sufficient space for the wide-over head of the slab, thereby effectively avoiding the risk of steel jamming in the sixth pass and ensuring continuous and stable rolling.

[0107] Please refer to Figure 2 A device structure diagram for preventing slab steel jamming is provided for the embodiments of the present application, comprising:

[0108] The rough rolling pass data acquisition unit 21 is configured to acquire the slab head width parameters and the average value of the strip body width of each rough rolling pass, wherein the slab head width parameters include the average value of the head width, the maximum value of the head width, and the standard deviation of the head width.

[0109] The width reduction amount data acquisition unit 22 is configured to acquire the strip body width reduction amount, the maximum width reduction amount, and the width reduction amount of the widest position of the head corresponding to the edger width reduction pass in the case that there is an edger width reduction pass after the current rough rolling pass.

[0110] The parameter validity determination unit 23 is configured to determine whether the slab head width parameters are valid based on the standard deviation of the head width.

[0111] The roll gap compensation value determination unit 24 is configured to determine the compensation value of the head edger roll gap based on the maximum value of the head width, the average value of the strip body width, the strip body width reduction amount, and the maximum width reduction amount in the case that the slab head width parameters are valid and the width reduction amount of the widest position of the head is greater than the maximum width reduction amount.

[0112] The short stroke roll gap adjustment unit 25 is configured to adjust the short stroke roll gap value of the edger width reduction pass based on the compensation value of the head edger roll gap, so as to adapt to the slab head width over state.

[0113] Please refer to Figure 3 The embodiments of the present application also provide an electronic device 300, which comprises a memory 310, a processor 320, and a computer program 311 stored in the memory 310 and capable of running on the processor. When the processor 320 executes the computer program 311, the steps of any method for preventing slab steel jamming are implemented.

[0114] ​Since the electronic device described in the embodiment is the device used in the implementation of the device for preventing the slab from clamping the steel, and based on the method described in the embodiment, those skilled in the art can understand the specific implementation of the electronic device and various changes thereof, so how the electronic device implements the method in the embodiment will not be described in detail here, as long as the device used by those skilled in the art to implement the method in the embodiment belongs to the scope of protection of the present application.

[0115] In the implementation process, the computer program 311 can implement any embodiment of the first aspect when executed by the processor.

[0116] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0117] Those skilled in the art should understand that the embodiments of the present application can provide methods, systems or computer program products. Therefore, the present application can take the form of a completely hardware embodiment, a completely software embodiment or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-readable storage media containing computer-readable program code.

[0118] The present application is described with reference to flowcharts and / or block diagrams according to the method, device (system) and computer program product of the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams can be implemented by computer program instructions, and the combination of the flows and / or blocks in the flowcharts and / or block diagrams. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing devices to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices produce a means for implementing the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 an apparatus that performs the functions specified in one or more flows and / or blocks.

[0119] These computer program instructions can also be stored in a computer-readable memory that can guide the computer or other programmable data processing devices to work in a specific way, so that the instructions stored in the computer-readable memory produce a product including instruction apparatus, which implements the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 an apparatus that performs the functions specified in one or more flows and / or blocks.

[0120] These computer program instructions can also be loaded into a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 The flowchart blocks or blocks Figure 1 The flowchart blocks or blocks

[0121] The embodiments of the present application also provide a computer program product, which comprises computer software instructions, when the computer software instructions are run on a processing device, causing the processing device to perform Figure 1 The flowchart of the method for preventing slab from sticking to steel in the corresponding embodiment.

[0122] The computer program product comprises one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flowchart or function according to the embodiments of the present application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired or wireless mode. The computer readable storage medium can be any available medium that the computer can store or be integrated into a data storage device such as a server, data center and the like containing one or more available media sets. The available media can be magnetic media, optical media or semiconductor media, etc.

[0123] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0124] In several embodiments provided in the present application, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the apparatus embodiments described above are only schematic. The division of units is only a logical function division. Actual implementation can have another division manner. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or components shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0125] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, i.e., may be located in one place, or may be distributed to multiple network units. Part or all of the units may be selected according to actual needs to achieve the purpose of the embodiment.

[0126] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present alone, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware and / or software functional units.

[0127] If the integrated unit is realized in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for causing a computer device to execute all or part of the steps of the embodiments of the present application.

[0128] The above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

[0129] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to the embodiments once they know the basic creative concept. Therefore, the appended claims are intended to include the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0130] Obviously, those skilled in the art can make various modifications and changes to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and changes of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and changes.

Claims

1. A method of preventing plate clamping of a slab, characterized by, The method comprises: obtaining slab head width parameters and strip width average value of each rough rolling pass, wherein the slab head width parameters comprise head width average value, head width maximum value and head width standard deviation; in the case that there is an edger reducing pass after the current rough rolling pass, obtaining strip reducing amount, maximum reducing amount and head widest position reducing amount corresponding to the edger reducing pass; determining whether the slab head width parameters are valid based on the head width standard deviation; in the case that the slab head width parameters are valid and the head widest position reducing amount is greater than the maximum reducing amount, determining head edger gap compensation value based on the head width maximum value, the strip width average value, the strip reducing amount and the maximum reducing amount; adjusting short stroke gap value of the edger reducing pass based on the head edger gap compensation value to adapt to slab head width overrunning state.

2. The method of claim 1, wherein, The determination of whether the slab head width parameters are valid based on the head width standard deviation comprises: comparing the head width standard deviation with a preset standard deviation threshold range; if the head width standard deviation is within the preset standard deviation threshold range, determining that the slab head width parameters are valid; if the head width standard deviation exceeds the preset standard deviation threshold range, determining that the slab head width parameters are invalid.

3. The method of claim 1, wherein, The determination of head edger gap compensation value based on the head width maximum value, the strip width average value, the strip reducing amount and the maximum reducing amount in the case that the slab head width parameters are valid and the head widest position reducing amount is greater than the maximum reducing amount comprises: generating a first difference value based on difference operation result of the head width maximum value and the strip width average value in the case that the slab head width parameters are valid and the head widest position reducing amount is greater than the maximum reducing amount; generating a second difference value based on difference operation result of the maximum reducing amount and the strip reducing amount; determining head edger gap compensation value based on difference operation result of the first difference value and the second difference value.

4. The method of claim 1, wherein, The head widest position reducing amount is determined based on the head width maximum value, the strip width average value and the strip reducing amount.

5. The method of claim 1, wherein, The adjustment of short stroke gap value of the edger reducing pass based on the head edger gap compensation value to adapt to slab head width overrunning state comprises: obtaining initial head short stroke gap value of the edger reducing pass; determining target gap value based on the head edger gap compensation value and the initial head short stroke gap value; adjusting short stroke gap value of the edger reducing pass to the target gap value to adapt to slab head width overrunning state.

6. The method of claim 1, wherein, The obtaining of slab head width parameters and strip width average value of each rough rolling pass comprises: collecting initial width data of slab head and strip width average value; performing filtering processing on the initial width data based on sliding window algorithm to obtain head width average value, head width maximum value and head width standard deviation as the slab head width parameters; storing the slab head width parameters and the strip width average value for subsequent pass calling.

7. The method of claim 1, wherein, After adjusting the short-stroke roll gap value of the edger reducing pass, further comprising: monitoring the rolling load and the vibration amplitude of the edger mill; if the rolling load is greater than a preset safe load threshold or the vibration amplitude is greater than a preset safe vibration threshold, controlling the edger mill to stop and generating an alarm signal.

8. An apparatus for preventing plate clamping of a steel sheet, characterized by comprising: a plate clamping preventing device according to any one of claims 1 to 7. The device comprises: a rough rolling pass data acquisition unit configured to acquire slab head width parameters and strip width average value of each rough rolling pass, wherein the slab head width parameters comprise head width average value, head width maximum value and head width standard deviation; a reduction amount data acquisition unit configured to acquire strip reduction amount, maximum reduction amount and head widest position reduction amount corresponding to the edger reducing pass if the edger reducing pass exists after the current rough rolling pass; a parameter validity judgment unit configured to judge whether the slab head width parameters are valid based on the head width standard deviation; a roll gap compensation value determination unit configured to determine head edger roll gap compensation value based on the head width maximum value, the strip width average value, the strip reduction amount and the maximum reduction amount if the slab head width parameters are valid and the head widest position reduction amount is greater than the maximum reduction amount; a short-stroke roll gap adjustment unit configured to adjust the short-stroke roll gap value of the edger reducing pass based on the head edger roll gap compensation value to adapt to slab head width overrunning state.

9. An electronic device comprising: A memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor is configured to implement the steps of the method for preventing slab sticking steel according to any one of claims 1 to 7 when executing the computer program stored in the memory.

10. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the method for preventing slab sticking steel according to any one of claims 1 to 7.

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