A method and device for correcting the wear of working rolls in an endless rolling line

Abstract

The present invention discloses a method and device for correcting the wear of working rolls in a headless rolling line. The method comprises: obtaining, for the working rolls of any stand in the headless rolling line, the current predicted wear of the current roll period and the historical actual wear and historical predicted wear of N historical roll periods corresponding to the current roll period, where N is a positive integer; obtaining the predicted deviation of the upper roll based on the historical actual wear and historical predicted wear of the upper roll; obtaining the predicted deviation of the lower roll based on the historical actual wear and historical predicted wear of the lower roll; correcting the current predicted wear of the upper roll based on the predicted deviations of the upper roll in N historical roll periods to obtain the corrected wear of the upper roll; and correcting the current predicted wear of the lower roll based on the predicted deviations of the lower roll in N historical roll periods to obtain the corrected wear of the lower roll. The present invention can correct the roll wear predicted by the existing prediction model, thereby improving the accuracy of plate shape control in the headless rolling line.

Description

Technical Field

[0001] The present invention relates to the technical field of steel rolling, and in particular to a method and device for correcting the wear of a working roll of a headless rolling line. Background Art

[0002] This endless rolling line features a three-stand roughing mill (H0-H2) and five-stand finishing mill (F1-F5) continuous rolling arrangement. Work rolls are categorized into three types based on mill layout and function: H0-H1 are large-diameter rolls, primarily used for adjusting crown distribution; H2-F2 are medium-diameter rolls, used to coordinate crown and flatness control; and F3-F5 are small-diameter rolls, used for flatness control. Two types are categorized based on roll changing cycles: roughing work rolls can be changed continuously for dozens of roll cycles, while finishing work rolls can be changed within a single roll cycle. Work roll profile types are categorized into three types: negative crown (applicable to all stands H0-F5), single-sided tapered rolls (applicable to stands F3-F5), and OSR (applicable to stands H2-F2). Work roll material types are categorized into two types: high-speed steel (widely used for work rolls in all stands) and high-chromium steel (used in limited quantities in stands H1 and H2). Different work roll shapes and materials can be used together, so there are many combinations of rolls for different roll cycles. At the same time, the wear of the rolls varies greatly when rolling different steel grades and cross-section specifications. There is also the problem of uneven wear of the upper and lower rolls. The current status of the deviation between the predicted and actual wear values for different steel grades and different stands is detailed in Figure 1 As shown in the figure (AA1, AA3, and AA5 are different steel grades). The current model does not take the above factors into account when predicting roll wear, and is unable to configure and predict wear by steel grade. A symmetrical method is also adopted for roll calculation. Generally, the model calculation values of the upper and lower rolls are equal. When the interference and restrictions of various conditions and factors on site are added, there will be a certain deviation in the actual wear of the upper and lower rolls. This makes the model calculation and verification very limited, resulting in a large deviation between the model-predicted wear and the actual wear, which seriously affects the model prediction accuracy and is seriously inconsistent with the actual wear situation. This causes a disconnect between wear control and actual wear conditions, restricting the model's ability to regulate plate shape.

[0003] Therefore, the existing prediction models have low accuracy in predicting roll wear and cannot be used accurately for plate shape control in headless rolling production lines. Summary of the Invention

[0004] In view of the above problems, the present invention proposes a method and device for correcting the wear of the working rolls of a headless rolling line, which can correct the wear of the rolling rolls predicted by the existing prediction model and improve the plate shape control accuracy in the headless rolling line.

[0005] In the first aspect, the present application provides the following technical solutions through an embodiment:

[0006] A method for correcting the wear of a working roll of an endless rolling line, comprising:

[0007] For the working rolls of any stand of the headless rolling production line, the current predicted wear amount of the current roll period and the historical actual wear amount and the historical predicted wear amount of N historical roll periods corresponding to the current roll period are obtained; the historical actual wear amount includes the historical actual wear amount of the upper roll and the historical actual wear amount of the lower roll, and the historical predicted wear amount includes the historical predicted wear amount of the upper roll and the historical predicted wear amount of the lower roll; the current predicted wear amount includes the current predicted wear amount of the upper roll and the current predicted wear amount of the lower roll; N is a positive integer; based on the historical actual wear amount of the upper roll and the historical predicted wear amount of the upper roll, the predicted deviation amount of the upper roll is obtained; based on the historical actual wear amount of the lower roll and the historical predicted wear amount of the lower roll, the predicted deviation amount of the lower roll is obtained; based on the historical actual wear amount of the lower roll and the historical predicted wear amount of the lower roll, the current predicted wear amount of the upper roll is corrected according to the predicted deviation amount of the upper roll in the N historical roll periods to obtain the corrected wear amount of the upper roll; based on the predicted deviation amount of the lower roll in the N historical roll periods, the current predicted wear amount of the lower roll is corrected to obtain the corrected wear amount of the lower roll; wherein, the corrected wear amount of the upper roll and the corrected wear amount of the lower roll are used as the control basis of the rolling mill roll.

[0008] Optionally, the correcting the current predicted wear amount according to the upper roller predicted deviation amount of the N historical roller periods to obtain the corrected wear amount of the upper roller includes:

[0009] Corresponding weights are assigned to the upper roller predicted deviations of the N historical roller periods; wherein, the larger the upper roller predicted deviation is, the larger the corresponding weight is; and the current predicted wear amount of the upper roller is corrected according to the weighted sum of the upper roller predicted deviations of the N historical roller periods to obtain the corrected wear amount of the upper roller.

[0010] Optionally, obtaining the predicted deviation of the lower roller according to the historical actual wear amount of the lower roller and the historical predicted wear amount of the lower roller includes:

[0011] Corresponding weights are assigned to the predicted deviations of the lower roller in the N historical roller periods; wherein, the larger the predicted deviation of the lower roller, the larger the corresponding weight; and the current predicted wear amount of the lower roller is corrected according to the weighted sum of the predicted deviations of the lower roller in the N historical roller periods to obtain the corrected wear amount of the lower roller.

[0012] Optionally, the correcting the current predicted wear amount of the upper roller according to the predicted deviation amount of the upper roller in the N historical roller periods to obtain the corrected wear amount of the upper roller; and correcting the current predicted wear amount of the lower roller according to the predicted deviation amount of the lower roller in the N historical roller periods to obtain the corrected wear amount of the lower roller, include:

[0013] According to the formula Determine the corrected wear amount of the upper roller; wherein, Correct the wear amount of the upper roller, The current predicted wear amount of the upper roller, is the predicted deviation of the upper roll of the j historical roll period of the i-th stand, α1~α N is the weight, the larger the upper roller prediction deviation is, the larger the corresponding weight is; according to the formula Determine the corrected wear amount of the lower roller; wherein, Correct the wear of the lower roller, The current predicted wear amount for the lower roller, is the predicted deviation of the lower roll of the j historical roll period of the i-th stand, β1~β N is the weight, and the larger the lower roller prediction deviation is, the larger the corresponding weight is.

[0014] Optionally, the number N of the historical rolling periods is greater than or equal to 3.

[0015] Optionally, after correcting the current predicted wear amount of the upper roller according to the predicted deviation amount of the upper roller in the N historical roller periods to obtain the corrected wear amount of the upper roller, the method further includes:

[0016] The current predicted wear amount of the upper roller is updated to the corrected wear amount of the upper roller, which is used as the predicted wear amount of the upper roller in the next roller period; the current predicted wear amount of the lower roller is updated to the corrected wear amount of the lower roller, which is used as the predicted wear amount of the upper roller in the next roller period.

[0017] In the second aspect, based on the same inventive concept, this application provides the following technical solution through an embodiment:

[0018] A device for correcting the wear of a working roll of an endless rolling line, comprising:

[0019] A parameter acquisition module is used to acquire, for the working roll of any stand of the headless rolling production line, the current predicted wear amount of the current roll period and the historical actual wear amount and historical predicted wear amount of N historical roll periods corresponding to the current roll period; the historical actual wear amount includes the historical actual wear amount of the upper roll and the historical actual wear amount of the lower roll, the historical predicted wear amount includes the historical predicted wear amount of the upper roll and the historical predicted wear amount of the lower roll; the current predicted wear amount includes the current predicted wear amount of the upper roll and the current predicted wear amount of the lower roll; N is a positive integer; a prediction deviation acquisition module is used to acquire the predicted wear amount of the upper roll according to the historical actual wear amount of the upper roll The actual wear amount of the upper roller and the historical predicted wear amount of the upper roller are used to obtain the predicted deviation of the upper roller; the predicted deviation of the lower roller is obtained according to the historical actual wear amount of the lower roller and the historical predicted wear amount of the lower roller; a deviation correction module is used to correct the current predicted wear amount of the upper roller according to the upper roller predicted deviation amounts of the N historical roller periods to obtain the corrected wear amount of the upper roller; the current predicted wear amount of the lower roller is corrected according to the lower roller predicted deviation amounts of the N historical roller periods to obtain the corrected wear amount of the lower roller; wherein the corrected wear amount of the upper roller and the corrected wear amount of the lower roller are used as the basis for controlling the rolling mill roller.

[0020] Optionally, the deviation correction module is further configured to:

[0021] Corresponding weights are assigned to the upper roller predicted deviations of the N historical roller periods; wherein, the larger the upper roller predicted deviation is, the larger the corresponding weight is; and the current predicted wear amount of the upper roller is corrected according to the weighted sum of the upper roller predicted deviations of the N historical roller periods to obtain the corrected wear amount of the upper roller.

[0022] Optionally, the deviation correction module is further configured to:

[0023] Corresponding weights are assigned to the predicted deviations of the lower roller in the N historical roller periods; wherein, the larger the predicted deviation of the lower roller, the larger the corresponding weight; and the current predicted wear amount of the lower roller is corrected according to the weighted sum of the predicted deviations of the lower roller in the N historical roller periods to obtain the corrected wear amount of the lower roller.

[0024] In the third aspect, based on the same inventive concept, this application provides the following technical solution through an embodiment:

[0025] A readable storage medium stores a computer program thereon, which, when executed by a processor, implements the steps of the method described in any one of the first aspects above.

[0026] A method and device for correcting the wear of working rolls of a headless rolling line provided in an embodiment of the present invention obtains, for the working rolls of any frame of the headless rolling line, the current predicted wear of the current roll period and the historical actual wear and historical predicted wear of N historical roll periods corresponding to the current roll period; the historical actual wear includes the historical actual wear of the upper roll and the historical actual wear of the lower roll, and the historical predicted wear includes the historical predicted wear of the upper roll and the historical predicted wear of the lower roll; the current predicted wear includes the current predicted wear of the upper roll and the current predicted wear of the lower roll; N is a positive integer; then, based on the historical actual wear of the upper roll and the historical predicted wear of the upper roll, a predicted deviation of the upper roll is obtained; based on the historical actual wear of the lower roll and the historical predicted wear of the lower roll, a predicted deviation of the lower roll is obtained; finally, based on the predicted deviation of the upper roll in N historical roll periods, the current predicted wear of the upper roll is corrected to obtain the corrected wear of the upper roll; based on the predicted deviation of the lower roll in N historical roll periods, the current predicted wear of the lower roll is corrected to obtain the corrected wear of the lower roll; the corrected wear of the upper roll and the corrected wear of the lower roll are used as a control basis for the rolling roll. The corrected wear amounts of the upper roll and the lower roll obtained are both the results of corrections based on the prediction results of the existing prediction model (current predicted wear amounts), and the upper roll and the lower roll are corrected differently, which is more accurate and reliable; and after multiple roll periods, the prediction results can converge and be closer to the actual wear amounts, effectively improving the plate shape control accuracy in the headless rolling production line.

[0027] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings:

[0029] Figure 1 A schematic diagram showing the deviation between the predicted wear amount and the actual wear amount for different steel grades and different racks in the prior art is shown;

[0030] Figure 2 A flow chart of a method for correcting the wear of a working roll of an endless rolling line provided by an embodiment of the present invention is shown;

[0031] Figure 3(a) to Figure 3(b) A schematic diagram showing the deviation between the predicted wear amount and the actual wear amount of different steel grades corresponding to a frame in the prior art is shown;

[0032] Figure 3(c) to Figure 3(d) A schematic diagram showing the deviation between the predicted wear amount and the actual wear amount of different steel grades corresponding to a frame in implementing the method of the present invention is shown;

[0033] Figure 4 A schematic structural diagram of a working roll wear correction device for a headless rolling line provided by an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0034] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0035] With the rise of headless rolling technology, it was discovered during the production and research and development process that headless rolling lines have long rolling kilometers and uniform roll widths, requiring high rolling precision. Therefore, the accuracy of the roll wear prediction is very important. To this end, the embodiment of the present invention provides a method and device for correcting the wear of the working rolls of a headless rolling line, which corrects the prediction results of the existing prediction model. After multiple consecutive corrections, the correction results can be closer to the actual wear amount, effectively improving the plate shape control accuracy in the headless rolling line. The following is a further explanation of the present invention through specific examples.

[0036] See also Figure 2 , Figure 2 A flow chart of a method for correcting the wear of a working roll of an endless rolling line provided in one embodiment of the present invention is shown. The method comprises:

[0037] Step S10: For the working rolls of any stand of the headless rolling line, obtain the current predicted wear amount of the current roll period and the historical actual wear amount and historical predicted wear amount of N historical roll periods corresponding to the current roll period; the historical actual wear amount includes the historical actual wear amount of the upper roll and the historical actual wear amount of the lower roll, the historical predicted wear amount includes the historical predicted wear amount of the upper roll and the historical predicted wear amount of the lower roll; the current predicted wear amount includes the current predicted wear amount of the upper roll and the current predicted wear amount of the lower roll; N is a positive integer;

[0038] Step S20: obtaining a predicted deviation of the upper roller based on the historical actual wear amount of the upper roller and the historical predicted wear amount of the upper roller; obtaining a predicted deviation of the lower roller based on the historical actual wear amount of the lower roller and the historical predicted wear amount of the lower roller;

[0039] Step S30: Correct the current predicted wear amount of the upper roller according to the predicted deviation amount of the upper roller in the N historical roller periods to obtain the corrected wear amount of the upper roller; correct the current predicted wear amount of the lower roller according to the predicted deviation amount of the lower roller in the N historical roller periods to obtain the corrected wear amount of the lower roller; wherein the corrected wear amount of the upper roller and the corrected wear amount of the lower roller are used as the basis for controlling the rolling mill roller.

[0040] In this embodiment, steps S10-S30 combine the historical actual wear and historical predicted wear of N historical roll periods to correct the current predicted wear. Furthermore, the corrections are performed differently for the top and bottom rolls. The final correction result is more accurate and closer to the actual wear, effectively improving the accuracy of plate shape control in the endless rolling line. Each step of the present invention is described in detail below.

[0041] Step S10: For the working rolls of any stand of the headless rolling production line, obtain the current predicted wear amount of the current roll period and the historical actual wear amount and historical predicted wear amount of N historical roll periods corresponding to the current roll period; the historical actual wear amount includes the historical actual wear amount of the upper roll and the historical actual wear amount of the lower roll, and the historical predicted wear amount includes the historical predicted wear amount of the upper roll and the historical predicted wear amount of the lower roll; the current predicted wear amount includes the current predicted wear amount of the upper roll and the current predicted wear amount of the lower roll; N is a positive integer.

[0042] In step S10, the current predicted wear amount for the current roll period is the predicted wear amount calculated by the system's original model (wear model). The method of this embodiment further modifies this predicted wear amount based on historical data to improve prediction accuracy. The steel type and rolling specification change data for the current roll period can be determined based on the production plan. Therefore, N historical roll periods can be determined based on this. These N historical roll periods can be candidate roll periods with the same or closest rolling steel type and rolling mileage. Then, from these candidate roll periods, the N rolling roll periods closest in rolling time to the current roll period are determined as the N historical roll periods. Furthermore, whether the rolling specification changes for the current roll period are similar can also be considered. If there is no roll period with the same rolling steel grade, the 1 to 2 grades closest to the current rolling steel grade can be used as the closest steel grade; if there is no roll period with the same rolling mileage, the roll period with a difference from the current rolling mileage less than the preset ratio threshold can be used as the closest rolling mileage roll period; the value range of the preset ratio threshold can be less than 20%, for example 10%, 15%, and so on.

[0043] The historically predicted wear values for each of the N historical roll periods are corrected wear values after corrections have been made during the corresponding roll period. Furthermore, the historically predicted wear values are the predicted values for the final strip rolled during the corresponding roll period, ensuring that the predicted results are closer to the actual results.

[0044] Furthermore, in this embodiment, the number N of historical roll period values selected should be greater than or equal to 3, which can avoid large fluctuations caused by distortion of individual data in the optimization process; preferably, the value of N can be determined to be 3 to 10, so as to avoid selecting too many similar steel grades or similar kilometres when there are no identical steel grades or identical rolling kilometres, which leads to a decrease in correction accuracy.

[0045] Step S20: obtaining an upper roller predicted deviation amount based on the upper roller's historical actual wear amount and the upper roller's historical predicted wear amount; obtaining a lower roller predicted deviation amount based on the lower roller's historical actual wear amount and the lower roller's historical predicted wear amount.

[0046] In step S20, the order in which the predicted deviation values of the upper and lower rollers are obtained is not restricted. Specifically, the difference between the historical actual wear value of the upper roller and the historical predicted wear value of the upper roller can be used as the predicted deviation value of the upper roller, and the difference between the historical actual wear value of the lower roller and the historical predicted wear value of the lower roller can be used as the predicted deviation value of the lower roller.

[0047] Step S30: Correct the current predicted wear amount of the upper roller according to the predicted deviation amount of the upper roller in the N historical roller periods to obtain the corrected wear amount of the upper roller; correct the current predicted wear amount of the lower roller according to the predicted deviation amount of the lower roller in the N historical roller periods to obtain the corrected wear amount of the lower roller; wherein the corrected wear amount of the upper roller and the corrected wear amount of the lower roller are used as the basis for controlling the rolling mill roller.

[0048] In step S30, the current predicted wear amount is corrected according to the predicted deviation amount of the upper roller in the N historical roller periods to obtain the corrected wear amount of the upper roller, which specifically includes:

[0049] Assign corresponding weights to the upper roller predicted deviations of N historical roller periods; the larger the upper roller predicted deviation, the larger the corresponding weight; correct the current predicted wear of the upper roller according to the weighted sum of the upper roller predicted deviations of N historical roller periods to obtain the corrected wear of the upper roller.

[0050] According to the actual historical wear of the lower roller and the predicted historical wear of the lower roller, a predicted deviation of the lower roller is obtained, including: assigning corresponding weights to the predicted deviations of the lower roller in N historical roller periods; the larger the predicted deviation of the lower roller, the larger the corresponding weight; and correcting the current predicted wear of the lower roller according to the weighted sum of the predicted deviations of the lower roller in N historical roller periods to obtain a corrected wear of the lower roller.

[0051] The aforementioned correction method for assigning weights to the predicted deviations for different historical roll periods comprehensively considers the impact of predicted deviations for each historical roll period. Furthermore, given that larger predicted deviations have a greater impact, a greater weight can be assigned to these larger predicted deviations when assigning weights. For example, in this embodiment, weights can be assigned according to an arithmetic progression from small to large, with the sum of the weights being 1. Furthermore, considering the specific impact of a specific predicted deviation, weights can be assigned based on the proportion of predicted deviations for different historical roll periods to the total predicted deviation, with the total predicted deviation being the sum of the predicted deviations for each historical roll period. This ensures that the final corrected wear amount is more accurate and reliable.

[0052] Furthermore, in step S30, the correction can be achieved by the following formula:

[0053] According to the formula Determine the corrected wear amount of the upper roller; where, Correct the wear of the upper roller, The current predicted wear of the upper roller, is the predicted deviation of the upper roll of the j historical roll period of the i-th stand, α1~α N is the weight. The larger the upper roller prediction deviation is, the larger the corresponding weight is.

[0054] According to the formula Determine the corrected wear amount of the lower roller; where, Correct the wear of the lower roller, The current predicted wear of the lower roller, is the predicted deviation of the lower roll of the j historical roll period of the i-th stand, β1~β N is the weight. The larger the lower roller prediction deviation is, the larger the corresponding weight is.

[0055] It should be noted that, since the corresponding upper roller and lower roller are in a cooperative relationship, in some implementations, α1 to α N and β1~β N Can correspond to the same.

[0056] Finally, after completing the correction of the current predicted wear amount, it also includes:

[0057] The current predicted wear of the top roll is updated as the corrected wear of the top roll, which is used as the predicted wear of the top roll for the next roll period. The current predicted wear of the bottom roll is updated as the corrected wear of the bottom roll, which is used as the predicted wear of the top roll for the next roll period. After the last strip of the current roll period is rolled, the actual wear of the top and bottom rolls is measured to obtain the actual wear. This is used as the historical actual wear for the correction calculation of the next roll period.

[0058] After rolling over multiple roll periods over a period of time, steps S10-S30 are executed for each roll period. The resulting corrected wear amount will gradually converge toward the actual wear amount, resulting in increasingly smaller deviations after correction. This improves the prediction accuracy of the wear model and roll crown model, significantly benefiting the control of plate shape and cross-sectional profile.

[0059] Furthermore, in this embodiment, the above dynamic correction process can be terminated by setting a corresponding termination condition. In one implementation, the current predicted deviation (the difference between the actual wear of the current roller period and the predicted wear, the current predicted deviation includes the predicted deviation of the upper roller and the predicted deviation of the lower roller) ΔWi can be determined. T and ΔWi B Are they all less than the preset termination threshold? For example, when ΔWi T and ΔWi B When both are less than 0.05 mm, the correction process of the method of this embodiment can be stopped, and the original model of the rolling mill system can be used for prediction to continuously ensure the accuracy and avoid the consumption of additional computing resources; when ΔWi T and ΔWi B When both are greater than the termination threshold, the correction process can be resumed.

[0060] In order to make the concept of the embodiment of the present invention easier to understand, a specific example is given below to illustrate:

[0061] For a headless rolling production line with three-stand roughing (H0-H2) and five-stand finishing (F1-F5) continuous rolling arrangement, first, according to the steel type and rolling mileage, find the three roll periods closest to the current roll period and with the shortest time interval. For the three roll periods found, read the actual wear history of the upper and lower rolls of the H0-F5 stands at once. The historical predicted wear of the upper and lower rolls of the last piece of strip steel in each rolling period Record the deviation between the actual wear of the upper / lower roller and the predicted wear of the upper / lower roller (i is the rack number: H0-F5).

[0062] Then, the actual wear of the upper / lower rolls of the last strip of the current roll period is recorded as Correct the predicted wear of the upper / lower rollers of each stand. Take the upper roller of the above stand as an example (the other rollers can be implemented accordingly and will not be described in detail): Among them, α1~α3 are the weight coefficients corresponding to the three closest roll periods being traced.

[0063] Then, record the corrected wear of the upper and lower rolls of the last strip rolled in the current rolling period as After the current roll period is finished and removed from the machine, the actual wear of the current roll period is recorded. And record the predicted deviation between the actual wear amount and the corrected wear amount (i is the frame number). Record the model-corrected wear amount, taking the upper roller of the above frame as an example (the rest are similar): It is convenient for correction and use in the next similar rolling period.

[0064] By correcting each roller period over a period of time through the above correction process, the predicted wear amount will continue to tend towards the actual wear amount, so that the deviation between the actual wear amount and the corrected calculated value will become smaller and smaller.

[0065] The F3 stand, which uses a single-sided tapered roller profile, was selected as an example for demonstration. The predicted and actual wear values for various steel grades (Q235B, Q345, SPHC, SPHT, 40Mn, and SPA-H) rolled on this stand were compared. The wear of the upper and lower rollers on the F3 stand before implementation of the method is shown in Figures 3(a) and 3(b). The actual wear values for both upper and lower rollers are significantly greater than those predicted by the original model, and there is also a certain difference between the wear values of the upper and lower rollers. This results in inaccurate wear predictions for the F3 stand and frequent unilateral wear.

[0066] After the method of the present invention is implemented, the wear conditions of the upper and lower rollers of the F3 stand can be referred to as shown in Figures 3(c) and 3(d). The deviation between the model-predicted wear and the actual wear of different steel grades is greatly reduced, the accuracy of the model wear prediction is improved, and the recurrence of unilateral waves is effectively avoided.

[0067] In summary, when the headless rolling line working roll wear correction method of this embodiment is adopted, the roll wear predicted by the existing prediction model can be corrected, and the plate shape control accuracy in the headless rolling line can be improved.

[0068] See also Figure 4 Based on the same inventive concept, another embodiment of the present invention further provides a working roll wear correction device 300 for an endless rolling line, comprising:

[0069] The parameter acquisition module 301 is used to obtain the current predicted wear amount of the current roll period and the historical actual wear amount and historical predicted wear amount of N historical roll periods corresponding to the current roll period for the working roll of any stand of the headless rolling production line; the historical actual wear amount includes the historical actual wear amount of the upper roll and the historical actual wear amount of the lower roll, the historical predicted wear amount includes the historical predicted wear amount of the upper roll and the historical predicted wear amount of the lower roll; the current predicted wear amount includes the current predicted wear amount of the upper roll and the current predicted wear amount of the lower roll; N is a positive integer; the predicted deviation amount acquisition module 302 is used to obtain the predicted wear amount of the upper roll according to the historical actual wear amount of the upper roll and the historical actual wear amount of the lower roll. The actual wear amount and the historical predicted wear amount of the upper roller are used to obtain the predicted deviation amount of the upper roller; the predicted deviation amount of the lower roller is obtained according to the historical actual wear amount of the lower roller and the historical predicted wear amount of the lower roller; the deviation correction module 303 is used to correct the current predicted wear amount of the upper roller according to the predicted deviation amount of the upper roller in the N historical roller periods to obtain the corrected wear amount of the upper roller; the current predicted wear amount of the lower roller is corrected according to the predicted deviation amount of the lower roller in the N historical roller periods to obtain the corrected wear amount of the lower roller; wherein the corrected wear amount of the upper roller and the corrected wear amount of the lower roller are used as the control basis of the rolling mill.

[0070] As an optional implementation manner, the deviation correction module 303 is further specifically configured to:

[0071] Corresponding weights are assigned to the upper roller predicted deviations of the N historical roller periods; wherein, the larger the upper roller predicted deviation is, the larger the corresponding weight is; and the current predicted wear amount of the upper roller is corrected according to the weighted sum of the upper roller predicted deviations of the N historical roller periods to obtain the corrected wear amount of the upper roller.

[0072] As an optional implementation manner, the deviation correction module 303 is further specifically configured to:

[0073] Corresponding weights are assigned to the predicted deviations of the lower roller in the N historical roller periods; wherein, the larger the predicted deviation of the lower roller, the larger the corresponding weight; and the current predicted wear amount of the lower roller is corrected according to the weighted sum of the predicted deviations of the lower roller in the N historical roller periods to obtain the corrected wear amount of the lower roller.

[0074] As an optional implementation manner, the deviation correction module 303 is further specifically configured to:

[0075] According to the formula Determine the corrected wear amount of the upper roller; wherein, Correct the wear amount of the upper roller, The current predicted wear amount of the upper roller, is the predicted deviation of the upper roll of the j historical roll period of the i-th stand, α1~α Nis the weight, the larger the upper roller prediction deviation is, the larger the corresponding weight is; according to the formula Determine the corrected wear amount of the lower roller; wherein, Correct the wear of the lower roller, The current predicted wear amount for the lower roller, is the predicted deviation of the lower roll of the j historical roll period of the i-th stand, β1~β N is the weight, and the larger the lower roller prediction deviation is, the larger the corresponding weight is.

[0076] As an optional implementation, the number N of the historical rolling periods is greater than or equal to 3.

[0077] As an optional embodiment, a parameter updating module is further included, which is used, after correcting the current predicted wear amount of the upper roller according to the predicted deviation amount of the upper roller in the N historical roller periods to obtain the corrected wear amount of the upper roller:

[0078] The current predicted wear amount of the upper roller is updated to the corrected wear amount of the upper roller, which is used as the predicted wear amount of the upper roller in the next roller period; the current predicted wear amount of the lower roller is updated to the corrected wear amount of the lower roller, which is used as the predicted wear amount of the upper roller in the next roller period.

[0079] The specific functions and beneficial effects achieved by each functional module in the headless rolling line working roll wear correction device 300 provided in this embodiment are the same as those in the aforementioned method embodiment. Therefore, reference may be made to the aforementioned method embodiment and no further details will be given in this embodiment.

[0080] Based on the same inventive concept, another embodiment of the present invention further provides a readable storage medium having a computer program stored thereon, characterized in that when the program is executed by a processor, the steps of the method described in any of the aforementioned method embodiments are implemented. It should be noted that in the readable storage medium provided in the embodiment of the present invention, when the program is executed by a processor, the specific implementation of each step and the technical effects produced are the same as those in the aforementioned method embodiments. For the sake of simplicity, for matters not mentioned in the device embodiment, reference may be made to the corresponding content in the aforementioned method embodiments.

[0081] The term "and / or" that appears in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the objects associated before and after are in an "or" relationship; the word "comprising" does not exclude the existence of elements or steps that are not listed in the claims. The word "one" or "an" placed before an element does not exclude the existence of multiple such elements. The present invention can be implemented with the aid of hardware comprising several different elements and with the aid of appropriately programmed computers. In a unit claim that lists several devices, several of these devices can be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names.

[0082] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0083] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0084] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0085] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0086] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0087] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for correcting the wear of working rolls in an endless rolling line, characterized in that: include: For a working roll of any stand of the headless rolling line, obtain the current predicted wear amount of the current roll period and the historical actual wear amount and historical predicted wear amount of N historical roll periods corresponding to the current roll period; the historical actual wear amount includes the historical actual wear amount of the upper roll and the historical actual wear amount of the lower roll, the historical predicted wear amount includes the historical predicted wear amount of the upper roll and the historical predicted wear amount of the lower roll; the current predicted wear amount includes the current predicted wear amount of the upper roll and the current predicted wear amount of the lower roll; N is a positive integer; Obtaining a predicted deviation of the upper roller based on the historical actual wear amount of the upper roller and the historical predicted wear amount of the upper roller; obtaining a predicted deviation of the lower roller based on the historical actual wear amount of the lower roller and the historical predicted wear amount of the lower roller; The current predicted wear amount of the upper roller is corrected according to the predicted deviation amount of the upper roller in the N historical roller periods to obtain the corrected wear amount of the upper roller; the current predicted wear amount of the lower roller is corrected according to the predicted deviation amount of the lower roller in the N historical roller periods to obtain the corrected wear amount of the lower roller; wherein the corrected wear amount of the upper roller and the corrected wear amount of the lower roller are used as the basis for controlling the rolling mill roller.

2. The method according to claim 1, characterized in that The correcting the current predicted wear amount according to the upper roller predicted deviation amount of the N historical roller periods to obtain the corrected wear amount of the upper roller includes: Assigning corresponding weights to the upper roll prediction deviations of the N historical roll periods; wherein, the greater the upper roll prediction deviation, the greater the corresponding weight; The current predicted wear amount of the upper roller is corrected according to the weighted sum of the upper roller predicted deviation amounts of the N historical roller periods to obtain the corrected wear amount of the upper roller.

3. The method according to claim 1, characterized in that The step of correcting the current predicted wear amount of the lower roller according to the predicted deviation amount of the lower roller in the N historical roller periods to obtain the corrected wear amount of the lower roller includes: Assigning corresponding weights to the lower roll prediction deviations of the N historical roll periods; wherein, the greater the lower roll prediction deviation, the greater the corresponding weight; The current predicted wear amount of the lower roller is corrected according to the weighted sum of the predicted deviation amounts of the lower roller in the N historical roller periods to obtain the corrected wear amount of the lower roller.

4. The method according to claim 1, wherein The method further comprises correcting the current predicted wear amount of the upper roller according to the predicted deviation amount of the upper roller in the N historical roller periods to obtain the corrected wear amount of the upper roller; Correcting the current predicted wear amount of the lower roller according to the predicted deviation amount of the lower roller in the N historical roller periods to obtain the corrected wear amount of the upper roller includes: According to the formula Determine the corrected wear amount of the upper roller; wherein, Correct the wear amount of the upper roller, The current predicted wear amount of the upper roller, is the predicted deviation of the upper roll of the j historical roll period of the i-th stand, α1~α N is the weight, and the larger the upper roller prediction deviation is, the larger the corresponding weight is; According to the formula Determine the corrected wear amount of the lower roller; wherein, Correct the wear of the lower roller, The current predicted wear amount for the lower roller, is the predicted deviation of the lower roll of the j historical roll period of the i-th stand, β1~β N is the weight, and the larger the lower roller prediction deviation is, the larger the corresponding weight is.

5. The method according to claim 1, wherein The number N of the historical roll periods is greater than or equal to 3.

6. The method according to claim 1, characterized in that After correcting the current predicted wear amount of the upper roller according to the predicted deviation amount of the upper roller in the N historical roller periods to obtain the corrected wear amount of the upper roller, the method further includes: Updating the current predicted wear amount of the upper roller to the corrected wear amount of the upper roller to be used as the predicted wear amount of the upper roller in the next rolling period; The current predicted wear amount of the lower roller is updated to the corrected wear amount of the lower roller, so as to be used as the predicted wear amount of the lower roller in the next roller period.

7. A device for correcting the wear of working rolls of an endless rolling line, characterized in that: include: a parameter acquisition module, configured to acquire, for a working roll of any stand of the headless rolling line, a current predicted wear amount of a current roll period and historical actual wear amounts and historical predicted wear amounts of N historical roll periods corresponding to the current roll period; the historical actual wear amounts include historical actual wear amounts of the upper roll and historical actual wear amounts of the lower roll; the historical predicted wear amounts include historical predicted wear amounts of the upper roll and historical predicted wear amounts of the lower roll; the current predicted wear amounts include current predicted wear amounts of the upper roll and current predicted wear amounts of the lower roll; and N is a positive integer; A predicted deviation amount acquisition module is used to obtain a predicted deviation amount of the upper roller based on the historical actual wear amount of the upper roller and the historical predicted wear amount of the upper roller; and to obtain a predicted deviation amount of the lower roller based on the historical actual wear amount of the lower roller and the historical predicted wear amount of the lower roller; The deviation correction module is used to correct the current predicted wear of the upper roller according to the predicted deviation of the upper roller in the N historical roller periods to obtain the corrected wear of the upper roller; and correct the current predicted wear of the lower roller according to the predicted deviation of the lower roller in the N historical roller periods to obtain the corrected wear of the lower roller; wherein the corrected wear of the upper roller and the corrected wear of the lower roller are used as the basis for controlling the rolling mill.

8. The device according to claim 7, characterized in that The deviation correction module is further specifically used for: Assigning corresponding weights to the upper roll prediction deviations of the N historical roll periods; wherein, the greater the upper roll prediction deviation, the greater the corresponding weight; The current predicted wear amount of the upper roller is corrected according to the weighted sum of the upper roller predicted deviation amounts of the N historical roller periods to obtain the corrected wear amount of the upper roller.

9. The device according to claim 7, characterized in that The deviation correction module is further specifically used for: Assigning corresponding weights to the lower roll prediction deviations of the N historical roll periods; wherein, the greater the lower roll prediction deviation, the greater the corresponding weight; The current predicted wear amount of the lower roller is corrected according to the weighted sum of the predicted deviation amounts of the lower roller in the N historical roller periods to obtain the corrected wear amount of the lower roller.

10. A readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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