Method for adjusting the bending shape of a work roll

Abstract

The application provides a work roll bending shape adjusting method, which comprises the following steps: distributing a required input signal; determining validity of the required input signal; determining a maximum force and a minimum force of the work roll; determining a required permission; setting a work roll bending force increment of the work roll to a pre-calculated value by using a preset signal; setting a work roll bending force limit value according to a current dynamic range set by a roll gap control; calculating a delta value in KN units by using an i-unit value of an output register and a bending influence coefficient; determining a PI controller algorithm; adjusting a bending force of C4 according to the PI controller algorithm; and distributing a required output signal to adjust the work roll bending shape. The application can more quickly respond to defects of a plate shape and effectively adjust the work roll bending shape, so that the utility of the whole plate shape control system is improved.

Description

Technical Field

[0001] This invention belongs to the field of strip steel production technology, and in particular relates to a method for adjusting the bending shape of a work roll. Background Technology

[0002] The cold-rolled steel sheet rolling process involves the elastic deformation of the rolling mill and the plastic deformation of the rolled piece to obtain the desired qualified profile. Sheet shape is a crucial indicator of cold-rolled steel sheets, encompassing three aspects: flatness, cross-sectional convexity, and edge thinning. Rolling production is rapidly evolving towards higher precision, continuous operation, higher speed, larger scale, automation, informatization, and intelligence, fundamentally changing the control of the rolling process.

[0003] To effectively address the strip shape issue after rolling, a comprehensive analysis of the factors influencing it is essential. Metal undergoes a series of deformation processes under the action of rotating rolls to be rolled into the desired strip or sheet material. Strip shape is a recurring issue throughout the entire production process, and the final product's shape is affected by numerous factors. These factors can be broadly categorized into internal factors (the inherent properties of the metal) and external factors (rolling conditions). The physical properties of the metal itself (such as hardening characteristics and deformation resistance), the metal's geometry, especially the width-to-thickness ratio of the sheet and the crown of the raw material, all significantly impact the final product's strip shape.

[0004] The effects of rolling conditions are more complex, and sheet shape is influenced by numerous factors, such as the original roll crown, bending force, rolling speed, incoming material condition, and cooling conditions. The essence of sheet shape control is controlling the shape of the loaded roll gap during rolling. To achieve this, one can focus on both process and equipment. Process-wise, the sheet shape can be improved by altering the rolling schedule; equipment-wise, the sheet shape can be controlled by optimizing the original roll shape, using hydraulic bending rolls, and employing new rolling mills. The magnitude of the rolling force, the reduction in each pass, and the magnitude and distribution of tensile stress directly affect roll wear and thermal crown, thus influencing the loaded roll gap of the rolling mill. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by providing a method for adjusting the bending shape of a work roll.

[0006] This invention provides a method for adjusting the bending shape of a work roll, comprising:

[0007] Distribute the required input signals;

[0008] Determine the validity of the required input signal;

[0009] Determine the maximum and minimum forces on the work roll;

[0010] Determine the required license;

[0011] Set the incremental work roll bending force to a pre-calculated value using a preset signal;

[0012] Set the limit value of the work roll bending force according to the current dynamic range determined by the roll gap control;

[0013] Calculate the delta value in KN using the i-unit value of the output register and the bending influence coefficient;

[0014] Determine the PI controller algorithm;

[0015] Adjust the bending force of C4 according to the PI controller algorithm;

[0016] Allocate the required output signals to adjust the work roll bending shape.

[0017] Furthermore, the allocation of the required input signals includes:

[0018] Obtain the C2 correction output signal of the output register. If it is 0, output AFCX WRB delta ref as delta i-units. If it is 1, output AFCX C2 error as delta i-units, where -30 < delta i-units < 30, to obtain i-units_D_I; the i-units_D_I is the delta i-unita of the output register.

[0019] Furthermore, the determination of the validity of the required input signals includes:

[0020] When i-units_D_I is greater than 0, set the temporary boolean GT to 1. When i-units_D_I is not greater than 0, set the temporary boolean GT to 0; when i-units_D_I is less than 0, set the temporary booleanLT to 1. When i-units_D_I is not less than 0, set the temporary boolean LT to 0; when both the temporary booleanGT and the temporary boolean LT are set to 1, regard the boolean as an invalid input.

[0021] Furthermore, the determination of the maximum and minimum forces of the work roll includes:

[0022] Calculate the maximum and minimum forces of the work roll according to the following formula:

[0023]

[0024]

[0025] where, Fmax GS5W_MAX is the maximum force of the work roll; GS5W_MAX is the maximum adjustment value of the bending force of the S5 work roll; MMP is the percentage of the ratio of the maximum force to the minimum force of the work roll; MAX_FA is the maximum force allowed by comp; DFO is the delta force output; GS5W_B is the bending force of the S5 work roll; M-input2 is the bending force correction coefficient; MIN-FA is the minimum force allowed by comp.

[0026] Furthermore, determining the required license includes:

[0027] Determine the Select_4 signal; if it is 0, output Cascade input as SEL_4; if it is 1, output input4 as SEL_4.

[0028] Determine if Select_3 signal is 0, then output SEL_4 as SEL_3; if it is 1, then output input3 as SEL_3.

[0029] Determine the Select_2 signal; if it is 0, output SEL_3 as SEL_2; if it is 1, output input2 as SEL_2.

[0030] Determine the Select_1 signal; if it is 0, output SEL_2 as SEL_1; if it is 1, output input1 as SEL_1.

[0031] Output SEL_1 is used for the work roll bending force mode and work roll bending force control state. When the AFXC WRBDelta determination is true, the boolean input is valid, and the shape heartbeat mechanism at the AFC outlet is valid, the Delta enable is high. Input1, input2, input3, and input4 are all external input signals. SEL_1, SEL_2, and SEL_3 are output values ​​after SEL calculation. AFCX WRB Control Enable enables AFCX WRB control. Enable for thiscontroller enables the controller.

[0032] Furthermore, the step of setting the work roll bending force increment to a pre-calculated value using a preset signal includes:

[0033] Determine the Sel2 signal; if it is 0, output Casc1.0 as SEL_2; if it is 1, output in2 as SEL_2.

[0034] Determine the Sel1 signal; if it is 0, output SEL_2 as SEL_1; if it is 1, output input 1 as SEL_1. SEL_1 → Preset_Gain_Pos.

[0035] Judge the Sel2 signal. If it is 0, output Casc0.75 as SEL_2; if it is 1, output in2 as SEL_2.

[0036] Judge the Sel1 signal. If it is 0, output SEL_2 as SEL_1; if it is 1, output input 1 as SEL_1, and SEL_1→Preset_Gain_Neg.

[0037] When the Delta force output is greater than 0, then Delta force output÷Preset_Gain_Pos = the preset value of the PI controller.

[0038] When the Delta force output is less than 0, then Delta force output÷Preset_Gain_Geg = the preset value of the PI controller.

[0039] Further, calculating the delta value in KN by using the i-unit value of the output register and the bending influence coefficient includes:

[0040] Current delta value÷i-units_L_X = delta force input. Judge whether dlta is positive or negative. If the roll gap control is at the lower limit and the dlta force input is negative, then the PI enable is high-level effective; if the roll gap control is at the upper limit and the dlta force input is positive, then the PI enable is high-level effective.

[0041] Further, determining the PI controller algorithm includes:

[0042] Calculate the proportional gain Kp-P of the PI controller according to the following formula:

[0043]

[0044]

[0045] Among them, A_r is the bending actuator response; RT is the required total response time; D_st is the distance from the bracket to the instrument; S_rl is the belt length response distance; SP is the rolling speed at the bracket outlet; when 0.001 < 1 / RT < 1.2, 1 / RT = K_pi; K_pi is the integral gain of the PI controller; 5 < SP < S_bk; S_bk is the speed breakpoint to the response time.

[0046] When the PI enable is effective high level or after enabling the preset value of the PI controller, the average value of the input and the last scanned input is equal to half of the sum of input X and input X_1; the product of the average value of the input and the last scanned input and the total gain of the pi block is defined as IN_kg, and then multiplying IN_kg by the proportional gain to obtain the current value of the proportional part.

[0047] A_ccr = S_T × K_Int + A_ccr_1;

[0048] Where, S_T is the scan time for the execution of the program block; K_Int is the integrator gain; both A_ccr and A_ccr_1 are the current values of the integrator part; LOW_l < A_ccr < UP_l; LOW_l is the lower limit of the program block, and UP_l is the upper limit of the program block;

[0049] If the sum of the value of the proportional part and the value of the integrator part is between the upper and lower limits of the program block, then output it as the composite output of the program block. If the composite output of the program block is greater than the upper limit of the program block, then detect the upper limit and clamp it. If the composite output of the program block is less than the lower limit of the program block, then detect the lower limit and clamp it.

[0050] Further, adjusting the bending force of C4 according to the PI controller algorithm includes:<�

[0051] When the minimum force < Delta force output < the maximum force, output the Delta force output, and obtain L_AFCX_WRB_TRIMREF, M_AFCX_WRB_TRIMREF, and G_AFCX_WRB_TRIMREF under DLM when the output enable is high-level valid; L_AFCX_WRB_TRIMREF is the force fine-tuning sent to the roll gap controller; M_AFCX_WRB_TRIMREF is sent to the human-machine interface to display the calculated force adjustment value;

[0052] When the Delta force output is between the C4 maximum bending force limit and the C4 minimum bending force limit, directly output the Delta force output. When the Delta force output is greater than the C4 maximum bending force limit, obtain the result trimgtcmax. When the Delta force output is less than the C4 minimum bending force limit, obtain the result trimltcmin; When neither trimgtcmax nor trimltcmin holds, it means the C4 bending adjustment is confirmed.

[0053] Further, distributing the required output signals to adjust the bending shape of the work roll includes:

[0054] When i-units_L_X is not equal to 0, the bending force of the S5 work roll is divided by i-units_L_X, and L_AFCX_WRB_SIMIUNITS is obtained when the output enable is active high. L_AFCX_WRB_SIMIUNITS is sent as feedback to the simulator. C_AFCX_WRB_DREF, M_AFCX_WRB_TRIMREF and M_AFCX_WRB_TRIMREF are sent to the human-machine interface to display the calculated i_units fine-tuning. When the PI enable is active high, the AFCX WRB control is enabled and activated, the AFCXWRB regulator is activated, and the AFCX WRB control is intervened or frozen.

[0055] This invention provides a method for adjusting the bending shape of a work roll, including: allocating the required input signal; determining the validity of the required input signal; determining the maximum and minimum forces of the work roll; determining the required allowable force; setting the work roll bending force increment to a pre-calculated value using a preset signal; setting the work roll bending force limit value according to the current dynamic range determined by roll gap control; calculating the delta value in kN using the i-unit value of the output register and the bending influence coefficient; determining the PI controller algorithm; adjusting the bending force of C4 according to the PI controller algorithm; and allocating the required output signal to adjust the bending shape of the work roll. This invention can react more quickly to plate shape defects and effectively adjust the bending shape of the work roll, thereby improving the overall efficiency of the plate shape control system. Attached Figure Description

[0056] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0057] Figure 1 A flowchart illustrating a method for adjusting the bending shape of a work roll according to an embodiment of the present invention;

[0058] Figure 2 A diagram showing the positional relationship of multiple working rollers provided in an embodiment of the present invention;

[0059] Figure 3 This is a schematic diagram of a working roller bending shape adjustment system provided in an embodiment of the present invention. Detailed Implementation

[0060] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the scope of protection of the present invention.

[0061] In one embodiment, as Figure 1 and Figure 2 shown, the embodiment of the present invention provides an adjustment of the bending shape of a work roll, including:

[0062] Step 101, allocate the required input signal.

[0063] Obtain the C2 correction output signal of the output register (GFI). If it is 0, output AFCXWRB deltaref as deltai-units. If it is 1, output AFCX C2 error as deltai-units, where -30 < delta i-units < 30, and obtain i-units_D_I; the i-units_D_I is the delta i-unita of the output register.

[0064] Convert i-units to the influence coefficient of bending force. The value obtained by dividing the transfer function from the AFC work roll to i-unit by 3 is between -50 and 50, which is i-units_L_X (the influence coefficient of iunit on force).

[0065] Step 102, determine the validity of the required input signal.

[0066] When i-units_D_I (delta i-unita from GFI) is greater than 0, set the temporary boolean GT to 1. When i-units_D_I is not greater than 0, set the temporary boolean GT to 0; when i-units_D_I is less than 0, set the temporary boolean LT to 1. When i-units_D_I is not less than 0, set the temporary boolean LT to 0; when both the temporary boolean GT and the temporary boolean LT are set to 1, set the boolean as an invalid input.

[0067] Step 103, determine the maximum and minimum forces of the work roll.

[0068] The rolling speed must be higher than a predetermined minimum value to enable the work roll bending force (WRB) control function. The actual rolling speed is equal to the rolling speed at the exit of the support. The rolling speed at the exit of the support must be higher than 55 to reach the required rolling speed.

[0069] For example, the maximum and minimum forces of the work roll are calculated according to the following formulas:

[0070]

[0071]

[0072] Among them, F max GS5W_MAX is the maximum force of the work roll; GS5W_MAX is the maximum adjustment value of the bending force of the S5 work roll; MMP is the percentage of the ratio of the maximum force to the minimum force of the work roll; MAX_FA is the maximum force allowed by comp; DFO is the delta force output; GS5W_B is the bending force of the S5 work roll; M-input2 is the bending force correction coefficient; MIN-FA is the minimum force allowed by comp.

[0073] Generally, MAX_FA means that the maximum force allowed by comp is 500KN, MMP means that the ratio of maximum force to minimum force is 85%, and MIN_FA means that the minimum force allowed by comp is -400KN.

[0074] Step 104: Determine the required license.

[0075] In this step, the Select_4 (OFF BIT normally closed) signal is checked. If it is 0, the Cascade input is output as SEL_4; if it is 1, the input4 is output as SEL_4.

[0076] Determine if the Select_3 (OFF BIT normally closed) signal is 0, then output SEL_4 as SEL_3; if it is 1, output input3 as SEL_3.

[0077] Determine the Select_2 (AFCX WRB Control Enable b Parallel Enable for this controller) signal. If it is 0, output SEL_3 as SEL_2; if it is 1, output input2 as SEL_2.

[0078] Determine the Select_1 (AFCX WRB Control Enable b Parallel Enable for this controller) signal. If it is 0, output SEL_2 as SEL_1; if it is 1, output input1 as SEL_1.

[0079] Output SEL_1 is used for the work roll bending force mode and work roll bending force control state. When the AFXC WRBDelta determination is true, the boolean input is valid, and the shape heartbeat mechanism at the AFC outlet is valid, the Delta enable is high. Input1, input2, input3, and input4 are all external input signals. SEL_1, SEL_2, and SEL_3 are output values ​​after SEL calculation. AFCX WRB Control Enable enables AFCX WRB control. Enable for thiscontroller enables the controller.

[0080] Enables control delta; high level = active, low level = inactive. A boolean value indicates whether the delta value is normal. High level = ON, low level = OFF. This output will be enabled when the control system is active and the WRB automatic control function is enabled. Resets the PI controller; high level = resets the PI controller, low level = does not reset. The PI controller is only reset in two situations: when the output is not enabled and when there is no metal on the bracket.

[0081] Step 105: Use a preset signal to set the work roll bending force increment to a pre-calculated value.

[0082] In this step, the Sel2 signal is judged. If it is 0, the output Casc1.0 is SEL_2; if it is 1, the output in2 is SEL_2.

[0083] Determine the Sel1 signal. If it is 0, output SEL_2 as SEL_1. If it is 1, output input 1 as SEL_1. SEL_1 → Preset_Gain_Pos.

[0084] Determine the Sel2 signal; if it is 0, output Casc0.75 as SEL_2; if it is 1, output in2 as SEL_2.

[0085] Determine the Sel1 signal. If it is 0, output SEL_2 as SEL_1. If it is 1, output input 1 as SEL_1. SEL_1 → Preset_Gain_Neg.

[0086] When the Delta force output is greater than 0, then Delta force output ÷ Preset_Gain_Pos = the preset value of the PI controller.

[0087] When the Delta force output is less than 0, then Delta force output ÷ Preset_Gain_Geg = the preset value of the PI controller.

[0088] During the conversion process, a preset value is enabled. If the bend trimming is positive, the value is retained; if the bend trimming is negative, the value is deleted.

[0089] The preset signal is used to set the WRB increment to a pre-calculated value, which is located in the variable preset_value. If the difference between the Worl Roll and the Intermediate Roll Delta is greater than a certain amount, the delta is preset to bring them closer together. When the absolute value of the AFC WRB adjustment reference value minus the FC IR adjustment reference value is greater than or equal to 20, and other conditions are determined, the PI normal preset conditions are determined.

[0090] Step 106: Set the working roll bending force limit value according to the current dynamic range determined by the roll gap control.

[0091] When S5 WRB is activated by jogging, the roll gap control WRB will be used in manual jogging mode. When S5 IRB is activated by jogging, the switch can also be closed to manually jog the roll gap control WRB. When S5 WRB is at the lower limit, the roll gap control is also at the lower limit. When S5 WRB is at the upper limit, the roll gap control is also at the upper limit.

[0092] If either the WRB or IRB regulator is jogging, both regulators are disabled simultaneously. To enable the PI controller, a high level indicates it is enabled; a low level indicates it is disabled. The PI controller will be enabled when the WRB reference is not jogging, indicating control is enabled.

[0093] Step 107: Calculate the delta value in kN using the i-unit value of the output register and the bending influence coefficient.

[0094] When the delta value is invalid, there is no need to reset the delta value. When the delta enable is active high, the delta i-units input from GFI is set to the current delta value.

[0095] The current delta value ÷ i-units_L_X (the influence of i-unit on force) = delta force input. Determine whether delta is positive or negative. If the roll gap control is at the lower limit and the delta force input is negative, then the PI enable is active high. If the roll gap control is at the upper limit and the delta force input is positive, then the PI enable is active high.

[0096] Step 108: Determine the PI controller algorithm.

[0097] In this step, for example, the proportional gain Kp-P of the PI controller is calculated according to the following formula:

[0098]

[0099]

[0100] Among them, A_r is the bending actuator response; RT is the required total response time; D_st is the distance from the bracket to the instrument; S_rl is the belt length response distance; SP is the bracket outlet rolling speed; when 0.001 < 1 / RT < 1.2, 1 / RT = K_pi; K_pi is the integral gain of the PI controller; 5 < SP < S_bk; S_bk is the speed breakpoint to the response time.

[0101] When the PI is enabled with an effective high level or after the preset value of the PI controller is enabled, the average value of the input and the last scanned input is equal to half of the sum of the input X and the input X_1; the product of the average value of the input and the last scanned input and the total gain of the pi block is defined as IN_kg, and then the current value of the proportional part is obtained by multiplying IN_kg by the proportional gain.

[0102] A_ccr = S_T × K_Int + A_ccr_1;

[0103] Among them, S_T is the scan time for the execution of the program block; K_Int is the integrator gain; both A_ccr and A_ccr_1 are the current values of the integrator part; LOW_l < A_ccr < UP_l; LOW_l is the lower limit of the program block, and UP_l is the upper limit of the program block.

[0104] If the sum of the value of the proportional part and the value of the integrator part is between the upper and lower limits of the program block, its output is the composite output of the program block. If the composite output of the program block is greater than the upper limit of the program block, the upper limit is detected and clamped. If the composite output of the program block is less than the lower limit of the program block, the lower limit is detected and clamped.

[0105] Step 109, adjust the bending force of C4 according to the PI controller algorithm.

[0106] When the minimum force (Min_Froce_Out) < Delta force output < the maximum force (Max_Froce_Out), the Delta force output is output, and when the output enable high level is effective, L_AFCX_WRB_TRIMREF, M_AFCX_WRB_TRIMREF, and G_AFCX_WRB_TRIMREF are obtained under the DLM; L_AFCX_WRB_TRIMREF is the force fine-tuning sent to the roll gap controller, and M_AFCX_WRB_TRIMREF is sent to the human-machine interface to display the calculated force adjustment value.

[0107] Calculate the limits for C4 bending correction: When the Delta force output is between the maximum bending force limit and the minimum bending force limit of C4, directly output the Delta force output; when the Delta force output is greater than the maximum bending force limit of C4, obtain the result trimgtcmax; when the Delta force output is less than the minimum bending force limit of C4, obtain the result trimltcmin; when neither trimgtcmax nor trimltcmin is true, it indicates that the C4 bending adjustment is confirmed.

[0108] Step 1010: Assign the required output signal to adjust the bending shape of the work roll.

[0109] When i-units_L_X is not equal to 0, the bending force of the S5 work roll is divided by i-units_L_X, and L_AFCX_WRB_SIMIUNITS is obtained when the output enable is active high. L_AFCX_WRB_SIMIUNITS is sent as feedback to the simulator. C_AFCX_WRB_DREF, M_AFCX_WRB_TRIMREF and M_AFCX_WRB_TRIMREF are sent to the human-machine interface to display the calculated i_units fine-tuning. When the PI enable is active high, the AFCX WRB control is enabled and activated, the AFCXWRB regulator is activated, and the AFCX WRB control is intervened or frozen.

[0110] The present invention provides a method for adjusting the bending shape of the work roll, which can react more quickly to plate shape defects and effectively adjust the bending shape of the work tube to improve the efficiency of the entire plate shape control system.

[0111] In another embodiment, based on the same inventive concept, the present invention also provides a system for adjusting the bending shape of a work roll. Since the principle of this system in solving the problem is similar to that of the method for adjusting the bending shape of a work roll, the implementation of this system can refer to the implementation of the method for adjusting the bending shape of a work roll, and the repeated parts will not be described again.

[0112] In another embodiment, the work roll bending shape adjustment system provided in this invention, such as... Figure 3 As shown, it includes:

[0113] The first signal distribution module 10 is used to distribute the required input signals.

[0114] The signal validity determination module 20 is used to determine the validity of the required input signal.

[0115] Roller force determination module 30 is used to determine the maximum and minimum forces of the work roll.

[0116] License determination module 40 is used to determine the required license.

[0117] The bending force setting module 50 is used to set the work roll bending force increment to a pre-calculated value using a preset signal.

[0118] The bending force control module 60 is used to set the bending force limit of the work roll according to the current dynamic range determined by the roll gap control.

[0119] The calculation module 70 is used to calculate the delta value in kN using the i-unit value of the output register and the bending influence coefficient.

[0120] Algorithm determination module 80 is used to determine the PI controller algorithm.

[0121] The bending force adjustment module 90 is used to adjust the bending force of C4 according to the PI controller algorithm.

[0122] The second signal distribution module 100 is used to distribute the required output signal to adjust the bending shape of the work roll.

[0123] For more detailed information on the working process of each of the above modules, please refer to the relevant content disclosed in the foregoing embodiments, which will not be repeated here.

[0124] In another embodiment, the present invention provides a computer device including a processor and a memory; wherein the processor executes a computer program stored in the memory to implement the steps of the above-described method for adjusting the bending shape of the work roll.

[0125] For more detailed information on the above methods, please refer to the relevant content disclosed in the foregoing embodiments, which will not be repeated here.

[0126] In another embodiment, the present invention provides a computer-readable storage medium for storing a computer program; when the computer program is executed by a processor, it implements the steps of the above-described method for adjusting the bending shape of the work roll.

[0127] For more detailed information on the above methods, please refer to the relevant content disclosed in the foregoing embodiments, which will not be repeated here.

[0128] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The systems, devices, and storage media disclosed in the embodiments are described simply because they correspond to the methods disclosed in the embodiments; relevant details can be found in the method section.

[0129] Those skilled in the art will clearly understand that the techniques in the embodiments of the present invention can be implemented using software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solutions in the embodiments of the present invention, or the parts that contribute to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments or certain parts of the embodiments of the present invention.

[0130] The present invention has been described in detail above with reference to specific embodiments and exemplary examples; however, these descriptions should not be construed as limiting the present invention. Those skilled in the art will understand that various equivalent substitutions, modifications, or improvements can be made to the technical solutions and embodiments of the present invention without departing from the spirit and scope of the invention, and all such modifications and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims.

Claims

1. A method for adjusting the bending shape of a work roll, characterized in that, include: Allocate the required input signals, including: obtain the C2 correction output signal of the output register. If it is 0, output AFCX WRBdelta ref as delta i-units. If it is 1, output AFCX C2 error as delta i-units, and obtain i-units_D_I. Determine the validity of the required input signal; Determine the maximum and minimum forces on the work roll; Determine the required permission, including: judge the Select_4 signal, if it is 0, output Cascade input as SEL_4, if it is 1, output input4 as SEL_4; Determine the Select_3 signal; if it is 0, output SEL_4 as SEL_3; if it is 1, output input3 as SEL_3. Determine the Select_2 signal; if it is 0, output SEL_3 as SEL_2; if it is 1, output input2 as SEL_2. Determine the Select_1 signal; if it is 0, output SEL_2 as SEL_1; if it is 1, output input1 as SEL_1. Output SEL_1 is used for the work roll bending force mode and work roll bending force control state. When the AFCX WRB Delta judgment is true, the boolean input is valid, and the shape heartbeat mechanism at the AFC outlet is valid, the Delta enable is high. Input1, input2, input3, and input4 are all external input signals. SEL_1, SEL_2, and SEL_3 are output values ​​after SEL calculation. AFCX WRB Control Enable enables AFCX WRB control. Enable for this controller enables the controller. Select_4 is the normally closed OFF BIT signal, Select_3 is the normally closed OFF BIT signal, Select_2 is the AFCXWRB Control Enable b in parallel with the Enable for this controller signal, and Select_1 is the AFCX WRBControl Enable b in parallel with the Enable for this controller signal. The work roll bending force increment is set to a pre-calculated value using a preset signal: when the Delta force output is greater than 0, then Delta force output ÷ Preset_Gain_Pos = the preset value of the PI controller; when the Delta force output is less than 0, then Delta force output ÷ Preset_Gain_Neg = the preset value of the PI controller. Set the working roll bending force limit value according to the current dynamic range determined by the roll gap control; The delta value in kN is calculated using the i-units value of the output register and the bending effect coefficient. Determine the PI controller algorithm; Adjust the bending force of C4 according to the PI controller algorithm: When the minimum force < Delta force output < the maximum force, output Delta force output, and obtain L_AFCX_WRB_TRIMREF, M_AFCX_WRB_TRIMREF, and G_AFCX_WRB_TRIMREF under DLM when the output enable is high; L_AFCX_WRB_TRIMREF is the force fine-tuning sent to the roll gap controller; M_AFCX_WRB_TRIMREF is sent to the human-machine interface to display the calculated force adjustment value. Allocate the required output signals to adjust the bending shape of the work roll, including: When i-units_L_X is not equal to 0, divide the S5 work roll bending force by i-units_L_X and obtain L_AFCX_WRB_SIMIUNITS when the output enable is high; L_AFCX_WRB_SIMIUNITS is sent as feedback to the simulator; C_AFCX_WRB_DREF, M_AFCX_WRB_TRIMREF, and G_AFCX_WRB_TRIMREF are sent to the human-machine interface to display the calculated i-units fine-tuning; When the PI enable is high, the AFCX WRB control enable is activated, the AFCX WRB regulator is activated, and the AFCX WRB control intervention or freezing occurs.

2. The method for adjusting the bending shape of the work roll according to claim 1, characterized in that, In the step of allocating the required input signals: -30 < delta i-units < 30, and the i-units_D_I is the delta i-units of the output register.

3. The method for adjusting the bending shape of the work roll according to claim 1, characterized in that, Determine the validity of the required input signals, including: When i-units_D_I is greater than 0, set the temporary boolean GT to 1; when i-units_D_I is not greater than 0, set the temporary boolean GT to 0; when i-units_D_I is less than 0, set the temporary boolean LT to 1; when i-units_D_I is not less than 0, set the temporary boolean LT to 0; when both the temporary boolean GT and the temporary boolean LT are set to 1, set the boolean as an invalid input.

4. The method for adjusting the bending shape of the work roll according to claim 1, characterized in that, Determine the maximum and minimum forces of the work roll, including: Calculate the maximum and minimum forces of the work roll according to the following formula: ； ； in, F max This is the maximum force of the work roller; GS 5 W _ MAX This is the maximum adjustment value for the bending force of the S5 work roll; MMP This represents the percentage ratio of the maximum and minimum forces on the work roll. MAX _ FA The maximum force allowed by comp; DFO For delta force output; GS 5 W _ B For the S5 working bending roller force; This is the correction factor for the bending roller force; MIN - FA The minimum force allowed by comp.

5. The method for adjusting the bending shape of the work roll according to claim 1, characterized in that, Set the work roll bending force increment to the pre-calculated value by using the preset signal, including: Judge the Sel2 signal, if it is 0, output Casc1.0 as SEL_2, if it is 1, output in2 as SEL_2; Judge the Sel1 signal, if it is 0, output SEL_2 as SEL_1, if it is 1, output input 1 as SEL_1, SEL_1 → Preset_Gain_Pos; Determine the Sel2 signal; if it is 0, output Casc0.75 as SEL_2; if it is 1, output in2 as SEL_2. Determine the Sel1 signal. If it is 0, output SEL_2 as SEL_1. If it is 1, output input 1 as SEL_1. SEL_1 → Preset_Gain_Neg.

6. The method for adjusting the bending shape of the work roll according to claim 1, characterized in that, The calculation of the delta value in kN using the i-units value of the output register and the bending influence coefficient includes: The current delta value ÷ i - units_L_X = delta force input. Determine whether delta is positive or negative. If the roll gap control is at the lower limit and the delta force input is negative, then the PI enable is active high. If the roll gap control is at the upper limit and the delta force input is positive, then the PI enable is active high. Converting i-units to bending influence coefficients, the value obtained by dividing the transfer function from the AFC work roll to i-units by 3, which is between -50 and 50, is the bending influence coefficient i-units_L_X.

7. The method for adjusting the bending shape of the work roll according to claim 1, characterized in that, The algorithm for determining the PI controller includes: Calculate the proportional gain of the PI controller using the following formula. : ； ； in, A_r For the response of the bending actuator; RT For the required total response time; D_st The distance from the bracket to the instrument; S _ rl For longer response distance; SP For the support outlet rolling speed; when 0.001 < 1 / RT When <1.2, 1 / RT=K_pi ; K_pi The integral gain of the PI controller; 5< SP < S _ bk ; S _ bk The speed breakpoint to response time; When the PI enable is active high or the preset value of the PI controller is enabled, the average value of the input and the last scan of the input is equal to half of the sum of input X and input X_1; the product of the average value of the input and the last scan of the input and the total gain of the PI block is defined as IN_kg, and then IN_kg is multiplied by the proportional gain to obtain the current value of the proportional part. A _ CCR = S _ T × K _ Int + A _ CCR _1； Among them, S _ T is the scan time for the execution of the program block; K _ Int is the integrator gain; A _ CCR and A _ CCR _1 are both the current values of the integrator part; LOW_l< A _ CCR <UP_l; LOW_l is the lower limit of the program block, and UP_l is the upper limit of the program block; If the sum of the proportional part value and the integrator part value is between the upper and lower limits of the program block, then it is output as the composite output of the program block. If the composite output of the program block is greater than the upper limit of the program block, then the upper limit is detected and clamped. If the composite output of the program block is less than the lower limit of the program block, then the lower limit is detected and clamped.

8. The method for adjusting the bending shape of the work roll according to claim 1, characterized in that, The adjustment of the bending force of C4 according to the PI controller algorithm includes: When the Delta force output is between the maximum bending force limit and the minimum bending force limit of C4, the Delta force output is directly output. When the Delta force output is greater than the maximum bending force limit of C4, the result trimgtcmax is obtained; when the Delta force output is less than the minimum bending force limit of C4, the result trimltcmin is obtained; when neither trimgtcmax nor trimltcmin is true, it indicates that the C4 bending adjustment is confirmed.

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