Method for avoiding deviation and belt breakage in cold continuous rolling specification changing and related equipment

Abstract

The invention discloses a method for avoiding deviation and strip breakage in cold continuous rolling specification changing and related equipment, and relates to the technical field of automatic control in the rolling process. On the basis of the steel grade number, an adjustment plan suitable for rolling completion of the cold tandem mill is determined according to a preset steel grade transition rule, the preset steel grade transition rule is constructed on the basis of a steel grade material corresponding to the steel grade number, and the adjustment plan comprises production parameters of the to-be-adjusted steel; determining whether the steel grade materials of the adjacent steel grades in the adjustment plan meet a preset transition requirement or not; and under the condition that the steel grade materials of the adjacent steel grades meet the preset transition requirement, cold continuous rolling is conducted on the steel on the basis of the adjustment plan.

Description

Technical Field

[0001] The present application relates to the technical field of automatic control of rolling processes, and in particular to a method and related equipment for preventing deviation and strip breakage during cold rolling specification change. Background Art

[0002] At present, with the continuous development of industry, the demand for high-strength steel continues to rise in many fields. With its excellent properties, such as high strength, good toughness and corrosion resistance, high-strength steel plays a vital role in the automotive manufacturing, aerospace, construction engineering and other industries. With the rapid increase in the output of high-strength steel and the rapid expansion of varieties and specifications, market competition is becoming increasingly fierce.

[0003] However, in the production process, due to the tight delivery period and inventory, it is impossible to guarantee that there will be suitable transition materials every time the rolling mill changes specifications. This situation has brought many problems to production and seriously affected production efficiency and product quality. When the front and rear roll welds are in the process of changing specifications of the rolling mill, due to the large changes in rolling parameters, undesirable conditions such as rolling leakage, deviation, and roller strangulation often occur. Each strip break will cause about 5 tons of scrap and affect the operation time by 30 minutes. The strip was once broken due to the transition problem of the rolling mill, which took up to 36 hours to handle. In addition, roller marks are prone to appear during the start-up and shutdown process of the rolling mill, which further affects production operation and product quality. Therefore, it is necessary to propose a method to avoid deviation and strip breakage in cold rolling specification change, so as to at least solve some of the above problems. Summary of the invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further described in detail in the Detailed Description of the Invention section. The Summary of the Invention section of this application does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0005] In a first aspect, an embodiment of the present application provides a method for preventing deviation and strip breakage during cold rolling. The method comprises:

[0006] Get the steel grade;

[0007] Based on the steel grade, according to the preset steel grade transition rule, an adjustment plan suitable for the cold rolling mill to complete rolling is determined, wherein the preset steel grade transition rule is constructed based on the steel grade material corresponding to the steel grade, and the adjustment plan includes production parameters of the steel to be adjusted;

[0008] Determine whether the steel grade materials of adjacent steel grades in the adjustment plan meet the preset transition requirements;

[0009] When the steel material of adjacent steel grades meets the preset transition requirements, the steels are subjected to continuous cold rolling based on the adjustment plan.

[0010] In one embodiment of the present invention, the step of obtaining the steel grade comprises:

[0011] Get the initial steel grade;

[0012] Testing and analyzing the steel corresponding to the steel grade and brand to obtain analysis results;

[0013] The initial steel grade is subdivided according to the analysis result to obtain the steel grade.

[0014] In one embodiment of the present invention, the step of performing continuous cold rolling on the steel based on the adjustment plan comprises:

[0015] Adjusting the value of the roll gap of a stand for rolling steel to obtain a first adjustment result;

[0016] Adjusting the rack tension value based on the first adjustment result to obtain a second adjustment result;

[0017] Acquire a roller shifting variation based on the second adjustment result;

[0018] Based on the roll shifting variation, an additional roll bending compensation roll shifting compensation is operated to obtain an operation result;

[0019] Based on the operation result, adjusting the weld of the steel material to obtain a first adjustment result;

[0020] Adjusting the specifications of the steel material based on the first adjustment result to obtain a second adjustment result;

[0021] The steel material is subjected to tandem cold rolling based on the second adjustment result.

[0022] In one embodiment of the present invention, the step of adjusting the specification of the steel material based on the first adjustment result to obtain the second adjustment result includes:

[0023] Based on the first adjustment result, the yield strength of the steel is adjusted to within the preset yield strength, the rolling force of the frame rolling the steel is adjusted to the preset rolling force, the roll gap change of the frame is adjusted to the preset threshold, the tension of the frame is increased by a preset ratio, the fine gap control speed of the frame is adjusted to the preset speed, the bending roll force of the frame is adjusted to the preset bending roll force and the rolling speed of the steel is adjusted to obtain a second adjustment result.

[0024] In one embodiment of the present invention, the method further comprises:

[0025] Get the steel grade material corresponding to the steel grade;

[0026] Classifying the steel grade material to obtain a classification result;

[0027] Based on the classification results, preset steel grade transition rules are determined.

[0028] In one embodiment of the present invention, the step of determining a preset steel grade transition rule based on the classification result comprises:

[0029] Determine the transition material according to the classification result of the steel grade material;

[0030] In the case that the steel materials corresponding to any two steel grades reach the transition material, it is determined that the steels corresponding to the any two steel grades can be connected when rolled using the cold rolling mill.

[0031] In one embodiment of the present invention, the preset yield strength is 200 MPa.

[0032] In the second aspect, the present application proposes a system for preventing deviation and strip breakage during cold rolling specification change, the system comprising: a data acquisition module, a judgment module and a rolling module;

[0033] The data acquisition module is configured to: acquire the steel grade; based on the steel grade, determine an adjustment plan suitable for the cold rolling mill to complete rolling according to a preset steel grade transition rule, wherein the preset steel grade transition rule is constructed based on the steel grade material corresponding to the steel grade, and the adjustment plan includes production parameters of the steel to be adjusted;

[0034] The judgment module is configured to: determine whether the steel grade material of adjacent steel grades in the adjustment plan meets the preset transition requirements;

[0035] The rolling module is configured to perform cold continuous rolling on the steel based on the adjustment plan when the steel material of adjacent steel grades meets the preset transition requirements.

[0036] In a third aspect, an electronic device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor is used to implement the steps of a method for avoiding deviation and strip breakage in cold rolling specification change as described in any one of the first aspects when executing the computer program stored in the memory.

[0037] In a fourth aspect, the present application further proposes a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any one of the methods of the first aspect for avoiding deviation and strip breakage during cold rolling specification change.

[0038] In summary, an embodiment of the present application avoids deviation and strip breakage during cold rolling specification change, and determines an adjustment plan suitable for the cold rolling mill to complete rolling by pre-setting steel grade transition rules. When the steel material of adjacent steel grades meets the preset transition requirements, the steel is cold rolled based on the adjustment plan, thereby reducing empty coils and strip breakage caused by transition reasons.

[0039] The method for avoiding deviation and strip breakage during cold rolling specification change proposed in this application, and other advantages, objectives and features of this application will be reflected in part through the following description, and in part will be understood by technical personnel in this field through research and practice of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present specification. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0041] Figure 1 A schematic diagram of a process for preventing deviation and strip breakage during cold rolling specification change provided in an embodiment of the present application;

[0042] Figure 2 A schematic diagram of a system structure for preventing deviation and strip breakage during cold rolling specification change provided in an embodiment of the present application;

[0043] Figure 3 A schematic diagram of the structure of an electronic device for preventing deviation and strip breakage during cold rolling with varying specifications provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0045] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0046] See also Figure 1 , which is a schematic diagram of a process for preventing deviation and strip breakage in cold rolling specification change provided by an embodiment of the present application, which may specifically include:

[0047] S110, obtaining steel grade;

[0048] For example, obtain the steel grade and make an Excel template for planning and review. In this template, select some key parameters such as thickness, width, yield strength, curling temperature, etc. according to actual needs. These parameters are very critical for the variable specification operation of the rolling mill during production. By reviewing and monitoring these parameters, the rationality and feasibility of the production plan can be better guaranteed. When the transition changes of parameters such as width, steel grade, thickness, etc. are involved in the production process, if there are risks beyond the capacity of the rolling mill or there are risks, an alarm will be triggered. This can promptly remind operators to pay attention to potential problems so that they can take appropriate measures to ensure safe and stable production.

[0049] S120, based on the steel grade and in accordance with a preset steel grade transition rule, determining an adjustment plan suitable for the cold rolling mill to complete rolling, wherein the preset steel grade transition rule is constructed based on the steel grade material corresponding to the steel grade, and the adjustment plan includes production parameters of the steel to be adjusted;

[0050] Exemplarily, based on the steel grade and in accordance with the preset steel grade transition rules, an adjustment plan is determined to enable the cold rolling mill to successfully complete the steel rolling. Among them, the preset steel grade transition rules are constructed according to the steel grade material corresponding to the steel grade, that is, different steel grade materials determine how to transition between different steel grades during the rolling process of the cold rolling mill. The adjustment plan is to ensure that the cold rolling mill can operate efficiently and stably when rolling steels of different steel grades, and produce products that meet the requirements. This adjustment plan includes various production parameters of the steel to be adjusted. By adjusting these production parameters, the cold rolling mill can adapt to the rolling requirements of different steel grades, ensuring the smooth progress of the production process and the stability of product quality.

[0051] S130, determining whether the steel grade material of adjacent steel grades in the adjustment plan meets the preset transition requirements;

[0052] For example, by determining whether the steel grade materials of adjacent steel grades in the adjustment plan meet the preset transition requirements, the steel grade switching can be reasonably arranged during the production process, the production efficiency can be improved, the product quality can be guaranteed, and the production cost can be reduced.

[0053] S140. When the steel material of adjacent steel grades meets the preset transition requirements, the steels are subjected to continuous cold rolling based on the adjustment plan.

[0054] For example, when the steel material of adjacent steel grades meets the preset transition requirements, cold rolling of the steels based on the adjustment plan can ensure the smooth progress of the production process and improve product quality and production efficiency.

[0055] In summary, the method for avoiding deviation and strip breakage during cold rolling with specification changes proposed in the embodiment of the present application determines an adjustment plan suitable for the cold rolling mill to complete rolling by presetting steel grade transition rules. When the steel grade materials of adjacent steel grades meet the preset transition requirements, the steel is cold rolled based on the adjustment plan, thereby reducing empty coils and strip breakage caused by transition reasons. The roll gap and tension changes during steel grade transition are developed into a visible and adjustable HMI interface. The expanded steel grades are refined and classified to improve the accuracy of rolling parameter setting, and a set of specific adjustment plans for changing specifications are summarized. The steel grades produced by 2230 acid rolling cover almost all domestic varieties, and the invention is more comprehensive and authoritative. It ensures that the operating parameters have a basis to rely on, which is more accurate and scientific than the previous operation based on experience.

[0056] In some examples, the step of obtaining the steel grade includes:

[0057] Get the initial steel grade;

[0058] Testing and analyzing the steel corresponding to the steel grade and brand to obtain analysis results;

[0059] The initial steel grade is subdivided according to the analysis result to obtain the steel grade.

[0060] Exemplarily, obtaining the initial steel grade is a preliminary identification of the steel type, and the steel corresponding to the steel grade is tested and analyzed to obtain the analysis results. Through the testing and analysis of the steel, it is found that different batches or parts of steel have differences in certain characteristics. Based on these differences, that is, the analysis results, the initial steel grade is further subdivided to obtain the steel grade, so as to more accurately identify and distinguish steels with different characteristics.

[0061] The existing 77 initial steel grades are refined into 182 steel grades. The purpose of this is to avoid similar steel grades sharing the same rolling parameters. Because if similar steel grades share the same rolling parameters, it will not be able to accurately meet the specific needs of each steel grade. After refining the steel grades, more targeted parameters can be formulated for each steel grade, thereby improving the setting accuracy.

[0062] In some examples, the step of performing continuous cold rolling on the steel based on the adjustment plan includes:

[0063] Adjusting the value of the roll gap of a stand for rolling steel to obtain a first adjustment result;

[0064] Adjusting the rack tension value based on the first adjustment result to obtain a second adjustment result;

[0065] Acquire a roller shifting variation based on the second adjustment result;

[0066] Based on the roll shifting variation, an additional roll bending compensation roll shifting compensation is operated to obtain an operation result;

[0067] Based on the operation result, adjusting the weld of the steel material to obtain a first adjustment result;

[0068] Adjusting the specifications of the steel material based on the first adjustment result to obtain a second adjustment result;

[0069] The steel material is subjected to tandem cold rolling based on the second adjustment result.

[0070] For example, during the cold rolling process, the size of the stand roll gap directly affects the thickness of the steel. By adjusting the value of the stand roll gap, the degree of deformation of the steel during the rolling process can be changed, thereby achieving the required steel thickness. The 1-5# stand roll gap opening program is added to the HMI interface, and the adjustment can be intervened. The open roll gap is a positive value, the closed roll gap is a negative value, and the limit is modified by ±1.0mm to reduce the roll gap fluctuation during the transition between the front and rear rolls, and obtain the first adjustment result.

[0071] The frame tension has an important influence on the shape, dimensional accuracy and rolling force distribution of steel during cold rolling. After adjusting the roll gap value, the deformation of the steel has changed, and the frame tension value needs to be adjusted accordingly. According to the impact of the roll gap adjustment in the first adjustment result, determine the appropriate tension adjustment strategy to ensure the stability and quality of the steel during the rolling process. After the adjustment, the second adjustment result is obtained. Specifically: Add tension change judgment and intervention operation: Add the front and rear roll tension difference alarm display in the HMI interface, prompting the operator to take speed reduction or manual tension adjustment measures according to different specifications to achieve manual intervention in tension.

[0072] Roll shifting is an operation to adjust the position of the rolls, which can change the contact state between the rolls and the steel, thus affecting the shape and surface quality of the steel. The appropriate roll shifting change is calculated based on the tension adjustment in the second adjustment result. While performing the roll shifting operation, in order to further optimize the shape and quality of the steel, it is necessary to perform compensation operations on the additional bending rolls. According to the roll shifting change, the additional bending rolls are operated to compensate for the roll shifting, so as to ensure the stability of the shape and good surface quality of the steel during the rolling process. The operation results are obtained after the operation. Specifically: Add the next roll shifting change display and operation method: According to the next roll shifting change, operate the additional bending roll to compensate for the roll shifting.

[0073] According to the above operation results, the weld of the steel is adjusted, and the first adjustment result is obtained after the adjustment. Specifically, the original weld is located at 50% of the wedge transition zone, and the strip steel changes from one specification to another. By debugging the secondary model, the rolling force is sent down, so that 80% of the wedge transition zone is completed on the high-strength steel before the weld.

[0074] According to the first adjustment result of the weld adjustment, the specification of the steel is further adjusted to obtain a second adjustment result. Finally, according to the steel specification parameters and other production adjustment conditions in the second adjustment result, the steel is again subjected to cold rolling operation.

[0075] In some examples, the step of adjusting the specification of the steel material based on the first adjustment result to obtain the second adjustment result includes:

[0076] Based on the first adjustment result, the yield strength of the steel is adjusted to within the preset yield strength, the rolling force of the frame rolling the steel is adjusted to the preset rolling force, the roll gap change of the frame is adjusted to the preset threshold, the tension of the frame is increased by a preset ratio, the fine gap control speed of the frame is adjusted to the preset speed, the bending roll force of the frame is adjusted to the preset bending roll force and the rolling speed of the steel is adjusted to obtain a second adjustment result.

[0077] Exemplarily, yield strength is an important mechanical property index of steel, which reflects the stress value at which steel begins to produce obvious plastic deformation when subjected to stress. According to the first adjustment result, it will be found that the yield strength of the current steel is not within the ideal range and needs to be adjusted. The yield strength of the steel is adjusted to within the preset yield strength, and the outlet thickness is within 0.5mm and the width is within 250mm. The rolling force of the stand for rolling the steel is adjusted to the preset rolling force, that is, the unit rolling force of the rolling mill 5 stand is modified to 6.5kn / mm (this value is the median of the previous roll and the next roll to prevent the rolling force from crossing and causing a sudden change in plate shape). The roll gap variation of the stand is adjusted to the preset threshold, that is, the roll gap variation of the rolling mill is modified to 0.7mm for stand 1 and 0.5mm for stand 2 / 3 / 4 in the rolling information interface. Increase the tension of the stand by a preset ratio, that is, increase the tension setting value between stands 1-5 by 10% in the next roll information. Adjust the fine gap control speed of the frame to the preset speed, that is, select the manual FGC speed of the rolling mill and modify it to 120mpm. Adjust the bending roll force of the frame to the preset bending roll force and adjust the rolling speed of the steel to obtain the second adjustment result. When the weld passes through the rolling mill, according to the position of the weld, manually gradually reduce the bending roll force of the working rolls of the 1-2 frames by 50KN, the bending roll force of the intermediate roll by 40KN, and reduce the bending roll force of the working rolls and intermediate rolls of the 3rd and 4th frames by 30KN each. If the tension drops low, operate the tension of the 4th frame and the roll speed of the 5th frame to prevent tension loss. After the weld passes through the 5th frame, the rolling mill speed is increased to 300mpm. According to the change of roll shifting, the manually increased bending roll compensation is gradually restored to 0. When the roll shifting is adjusted to the secondary setting value, the rolling mill speed is increased to the maximum speed. Restore the compensated tension, the modified roll gap change, and the rolling speed, and recalculate the rolling information to prevent entering the setting value of the next roll.

[0078] After that, the innovation of changing rolls to narrow, wide and change specifications is carried out: from the first roll to the mill stop, the rolling force of the 5-stand is modified to a constant value of 4.5kn / mm (small rolling force can suppress the middle wave in the process of narrowing and widening). The mill specification change speed is changed to 150mpm. When the weld reaches the mill, according to the width change of 1200mm≤W<1400mm, the bending roll is reduced by 30KN, 1400mm<W≤1600mm, the bending roll is reduced by 50KN, 1600mm≤W<1800mm, the bending roll is reduced by 70KN, and 1800mm≤W<2100mm, the bending roll is reduced by 100KN. When the maximum width is reached, cancel the shearing, select the upper and lower lines, ensure that the middle wave is less than 6IU, the side wave is less than 10IU, and ensure that the plate shape between the stands is good before the mill stops, about 25 meters is preferred, and the mill starts to change rolls.

[0079] In some examples, the method further includes:

[0080] Get the steel grade material corresponding to the steel grade;

[0081] Classifying the steel grade material to obtain a classification result;

[0082] Based on the classification results, preset steel grade transition rules are determined.

[0083] Exemplarily, a steel grade represents a specific type of steel, and each steel grade corresponds to a specific steel material, that is, a combination of characteristics such as the chemical composition, organizational structure, and mechanical properties of the steel. The steel material is classified to obtain a classification result. By classifying the steel material, steels with similar characteristics can be grouped into one category, which is convenient for unified processing and management during production, processing, and use. The classification results obtained after classification are different steel categories, each of which has specific material characteristics. Because different types of steel have different requirements and characteristics in the production process, it is necessary to determine the preset steel transition rules based on the classification results.

[0084] In some examples, the step of determining a preset steel grade transition rule based on the classification result includes:

[0085] Determine the transition material according to the classification result of the steel grade material;

[0086] In the case that the steel materials corresponding to any two steel grades reach the transition material, it is determined that the steels corresponding to the any two steel grades can be connected when rolled using the cold rolling mill.

[0087] Exemplarily, the transition material is determined according to the classification result of the steel grade material. This transition material is a key reference standard for judging whether different steel grades can be connected. If the steel grade material corresponding to any two steel grades meets the standard of this transition material, it can be determined that the steel grades corresponding to any two steel grades can be connected for continuous production when rolling using a cold rolling mill. Specifically: sort out the steel grades with high transition risks produced in the 15 years since the 2230 was put into production. Since the steel grades produced by 2230 acid rolling almost cover all domestic cold rolling steel grades, it is more comprehensive and applicable. Combined with the sorting out of the transition of steel grades with high historical break risks, it is convenient to adjust the plan sequence. For example: BE type steel cannot transition with high-strength steel, and AC and BC ordinary steel must be used in the middle. Q235B and # steel cannot transition with ordinary steel, and low alloys such as 340LA and 260LA must be used for transition. CF and AF type hot-formed steels use DP590 for transition. SLZW cannot transition with ordinary steel, and phosphorus-containing high-strength steel is required. Phosphorus-containing steels below 220Y can be transitioned with common steel and IF steel, while 250P1 needs to be transitioned with low alloy high strength steels from 340LA and above. Ultra-high strength transition must be gradual transition from CQ715 to CQ713 to CN713 to DP590.

[0088] In some examples, the preset yield strength is 200 MPa.

[0089] For example, yield strength is an important mechanical property index of steel, which reflects the stress value at which steel begins to produce obvious plastic deformation when subjected to stress. According to the first adjustment result, it is found that the yield strength of the current steel is not within the ideal range and needs to be adjusted. The yield strength of the steel is adjusted to within the preset yield strength, where the preset yield strength is 200Mpa.

[0090] This application reduces the annual benefit of empty coils and broken strips caused by transition (the amount of scrap produced in the original transition process - the amount of scrap caused by the current transition) × the average monthly benefit difference of the type of steel (the price difference between genuine and scrap) × 12 = 20t × 1653 × 12 = 396,700 yuan. The annual benefit of reducing the production time saved by breaking strips and deviations in the rolling mill (production time saved) × the average monthly benefit of tons of steel × the average hourly output × 12 = 3 × 195 × 350t × 12 = 2.457 million yuan. In summary, the total annual added benefit is 2.8537 million yuan.

[0091] like Figure 2 As shown, the present application proposes a system for preventing deviation and strip breakage during cold rolling specification change, the system comprising: a data acquisition module 21, a judgment module 22 and a rolling module 23;

[0092] The data acquisition module 21 is configured to: acquire the steel grade; based on the steel grade, determine an adjustment plan suitable for the cold rolling mill to complete rolling according to a preset steel grade transition rule, wherein the preset steel grade transition rule is constructed based on the steel grade material corresponding to the steel grade, and the adjustment plan includes production parameters of the steel to be adjusted;

[0093] The judgment module 22 is configured to: determine whether the steel grade material of adjacent steel grades in the adjustment plan meets the preset transition requirements;

[0094] The rolling module 23 is configured to perform cold continuous rolling on the steel based on the adjustment plan when the steel material of adjacent steel grades meets the preset transition requirements.

[0095] The effects of the above-mentioned system when applying the above-mentioned method can be found in the description of the above-mentioned method embodiment, which will not be repeated here.

[0096] like Figure 3 As shown, the embodiment of the present application also provides an electronic device 300, including a memory 310, a processor 320, and a computer program 311 stored in the memory 310 and executable on the processor. When the processor 320 executes the computer program 311, the steps of any of the above-mentioned methods for avoiding deviation or belt breakage in cold rolling specification variation are implemented.

[0097] Since the electronic device introduced in this embodiment is a device used to implement a device for avoiding deviation and belt breakage in cold rolling specifications in the embodiment of the present application, based on the method introduced in the embodiment of the present application, the technical personnel in this field can understand the specific implementation mode of the electronic device of this embodiment and its various variations. Therefore, how the electronic device implements the method in the embodiment of the present application will not be introduced in detail here. As long as the equipment used by the technical personnel in this field to implement the method in the embodiment of the present application is within the scope of protection of this application.

[0098] In the specific implementation process, when the computer program 311 is executed by the processor, it can achieve Figure 1 Any implementation manner in the corresponding embodiments.

[0099] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0100] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-readable program code.

[0101] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, 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 computer, or other programmable data processing device to generate 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 flowchart and / or block diagram. 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.

[0102] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate 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 A function specified in one or more boxes.

[0103] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0104] An embodiment of the present application also provides a computer program product, which includes computer software instructions. When the computer software instructions are executed on a processing device, the processing device executes the process of the LDPC decoding method of the solid-state hard disk controller.

[0105] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can store or a data storage device such as a server or a data center that includes one or more available media integration. The available medium can be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state drive (SSD)), etc.

[0106] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0107] In the several embodiments provided in the present application, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0108] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0109] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0110] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0111] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0112] Although the preferred embodiments of this specification 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 this specification.

[0113] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalents, this specification is also intended to include these modifications and variations.

Claims

1. A method for preventing deviation and strip breakage during cold rolling specification change, characterized in that: The method comprises: Get the steel grade; Based on the steel grade, according to the preset steel grade transition rule, an adjustment plan suitable for the cold rolling mill to complete rolling is determined, wherein the preset steel grade transition rule is constructed based on the steel grade material corresponding to the steel grade, and the adjustment plan includes production parameters of the steel to be adjusted; Determine whether the steel grade materials of adjacent steel grades in the adjustment plan meet the preset transition requirements; When the steel material of adjacent steel grades meets the preset transition requirements, the steel is subjected to continuous cold rolling based on the adjustment plan.

2. The method for preventing deviation and strip breakage during cold rolling specification change according to claim 1 is characterized in that: The step of obtaining the steel grade comprises: Get the initial steel grade; Testing and analyzing the steel corresponding to the steel grade and brand to obtain analysis results; The initial steel grade is subdivided according to the analysis result to obtain the steel grade.

3. The method for preventing deviation and strip breakage during cold rolling specification change according to claim 1 is characterized in that: The step of cold rolling the steel based on the adjustment plan comprises: Adjusting the value of the roll gap of a stand for rolling steel to obtain a first adjustment result; Adjusting the rack tension value based on the first adjustment result to obtain a second adjustment result; Acquire a roller shifting variation based on the second adjustment result; Based on the roll shifting variation, an additional roll bending compensation roll shifting compensation is operated to obtain an operation result; Based on the operation result, adjusting the weld of the steel material to obtain a first adjustment result; Adjusting the specifications of the steel material based on the first adjustment result to obtain a second adjustment result; The steel material is subjected to tandem cold rolling based on the second adjustment result.

4. The method for preventing deviation and strip breakage during cold rolling specification change according to claim 1 is characterized in that: The step of adjusting the specification of the steel material based on the first adjustment result to obtain the second adjustment result comprises: Based on the first adjustment result, the yield strength of the steel is adjusted to within the preset yield strength, the rolling force of the frame rolling the steel is adjusted to the preset rolling force, the roll gap change of the frame is adjusted to the preset threshold, the tension of the frame is increased by a preset ratio, the fine gap control speed of the frame is adjusted to the preset speed, the bending roll force of the frame is adjusted to the preset bending roll force and the rolling speed of the steel is adjusted to obtain a second adjustment result.

5. The method for preventing deviation and strip breakage during cold rolling specification change according to claim 1 is characterized in that: The method further comprises: Get the steel grade material corresponding to the steel grade; Classifying the steel grade material to obtain a classification result; Based on the classification results, preset steel grade transition rules are determined.

6. The method for preventing deviation and strip breakage during cold rolling specification change according to claim 5 is characterized in that: The step of determining a preset steel grade transition rule based on the classification result comprises: Determine the transition material according to the classification result of the steel grade material; In the case that the steel materials corresponding to any two steel grades reach the transition material, it is determined that the steels corresponding to the any two steel grades can be connected when rolled using the cold rolling mill.

7. The method for preventing deviation and strip breakage during cold rolling specification change according to claim 4 is characterized in that: The preset yield strength is 200Mpa.

8. A system for preventing deviation and belt breakage during cold rolling, characterized in that: The system comprises: a data acquisition module, a judgment module and a rolling module; The data acquisition module is configured to: acquire the steel grade; based on the steel grade, determine an adjustment plan suitable for the cold rolling mill to complete rolling according to a preset steel grade transition rule, wherein the preset steel grade transition rule is constructed based on the steel grade material corresponding to the steel grade, and the adjustment plan includes production parameters of the steel to be adjusted; The judgment module is configured to: determine whether the steel grade material of adjacent steel grades in the adjustment plan meets the preset transition requirements; The rolling module is configured to perform cold continuous rolling on the steel based on the adjustment plan when the steel material of adjacent steel grades meets the preset transition requirements.

9. An electronic device, comprising: A memory and a processor, characterized in that the processor is used to implement the steps of a method for avoiding deviation and strip breakage in cold rolling specification change as described in any one of claims 1 to 7 when executing the computer program stored in the memory.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, the steps of a method for avoiding deviation and strip breakage in cold rolling specification change as described in any one of claims 1 to 7 are implemented.

Images