Temperature control method and device for steel processing

Abstract

The invention discloses a temperature control method and device for steel machining, and relates to the technical field of temperature control. Acquiring a temperature parameter corresponding to the target steel to determine cooling control; determining a first temperature interval and a second temperature interval according to the material information of the target steel; the first temperature of the target steel is obtained and compared with the first temperature interval and the second temperature interval, and the cooling mode for the target steel is determined according to the comparison result and the cooling duration; if it is determined that the cooling mode of the target steel is the water-oil alternate cooling mode, the spraying system is controlled to conduct cooling operation on the target steel according to the first temperature interval, and the second temperature of the target steel is obtained; when the second temperature is within the first temperature interval, it is determined that the oil cooling system is controlled to cool the target steel according to the second temperature interval, and a third temperature is obtained; and if it is determined that the third temperature is within the second temperature interval, it is determined that cooling operation of the target steel is completed. According to the technical scheme, the comprehensive performance of a final product is improved.

Description

Technical Field

[0001] The present application relates to the field of temperature control technology, and in particular to a temperature control method and device for steel processing. Background Art

[0002] In the field of steel material processing, different application scenarios have differentiated requirements for the geometric dimensions, mechanical properties and microstructure of products. This requires that steel raw materials be processed into products that meet specific technical standards through plastic processing processes such as rolling and forging. During the hot working process, precise control of temperature parameters is crucial. If the process temperature exceeds the critical range, a series of metallurgical defects will be triggered: overheating will cause abnormal growth of austenite grains, significantly reducing the strength, toughness and other mechanical properties of the material; overburning will cause grain boundary oxidation and even local melting, resulting in irreversible material failure. These defects not only affect the product qualification rate, but also lead to production interruptions and additional process rework, seriously affecting production efficiency and cycle costs.

[0003] At present, the existing cooling processes mostly adopt fixed cooling methods, which cannot meet the cooling requirements of different steel materials and processing stages, resulting in a mismatch between the cooling effect and the steel processing stage, which in turn affects the overall performance of the final product.

[0004] Therefore, there is an urgent need for a temperature control method and device for steel processing that can solve the above technical problems. Summary of the Invention

[0005] The present application provides a temperature control method and device for steel processing. The method solves the problem of mismatch between cooling effect and processing stage caused by traditional fixed cooling method by dynamically adjusting the cooling method, thereby improving the overall performance of the final product.

[0006] In the first aspect, the present application provides a temperature control method for steel processing, the method comprising: obtaining temperature parameters corresponding to target steel, determining cooling control of the target steel according to the temperature parameters, wherein the target steel is steel in the processing stage; obtaining material information of the target steel, determining a first temperature interval and a second temperature interval according to the material information, wherein the first temperature interval is a cooling temperature interval required for water cooling, and the second temperature interval is a cooling temperature interval required for oil cooling, and the minimum value of the first temperature interval is greater than the maximum value of the second temperature interval; obtaining a first temperature of the target steel, comparing the first temperature with the first temperature interval and the second temperature interval, and obtaining a comparison result, wherein the first temperature is a temperature difference between the target steel and the target steel using an infrared thermometer. The temperature obtained by scanning is determined; based on the comparison result and the cooling time, the cooling method for the target steel is determined, and the cooling methods include water cooling, oil cooling and water-oil alternating cooling; if the cooling method of the target steel is determined to be the water-oil alternating cooling method, the spray system is controlled to cool the target steel according to the first temperature range to obtain a second temperature of the target steel; it is determined whether the second temperature is within the first temperature range; when the second temperature is within the first temperature range, the oil cooling system is controlled to cool the target steel according to the second temperature range to obtain a third temperature; it is determined whether the third temperature is within the second temperature range; if the third temperature is determined to be within the second temperature range, it is determined that the target steel has completed the cooling operation.

[0007] By adopting the above technical solution, the material information of the target steel is first obtained, and the first and second temperature ranges for water cooling and oil cooling are determined based on the material information. The first temperature of the target steel is then obtained in real time through an external temperature meter and dynamically compared with the first and second temperature ranges to obtain a comparison result. Based on the comparison result, water cooling, oil cooling, and alternating water and oil cooling are dynamically selected. This solves the problem that traditional cooling methods are fixed and cannot adapt to material differences. For high-temperature areas, the steel temperature is quickly reduced to the first temperature range through a spray system to achieve efficient heat dissipation and reduce the risk of high-temperature oxidation or decarburization. After the steel temperature drops to the second temperature range, it switches to oil cooling to slow the cooling rate and avoid structural stress concentration or increased brittleness caused by rapid cooling. After cooling, the cooling process is ensured to meet expectations by determining whether the second temperature after cooling is within the first temperature range and whether the third temperature is within the second temperature range. If the second or third temperature does not meet the standard, the cooling parameters can be adjusted or the cooling time can be extended in a timely manner to avoid substandard performance due to insufficient cooling or cracking risks due to excessive cooling, thereby ensuring the overall performance of the final product.

[0008] Optionally, the spray system is controlled to perform cooling operation on the target steel according to the first temperature range, specifically including: calculating the Reynolds number corresponding to the target flow medium according to the first formula, the target flow medium includes a water medium or an oil medium; calculating the Prandtl number corresponding to the target flow medium according to the second formula; calculating the internal energy change value corresponding to the internal structure of the target steel according to the third formula; calculating the heat loss value caused by evaporation of the target flow medium according to the fourth formula; obtaining the surface area and ambient temperature of the target steel, and calculating the heat change value corresponding to the target steel according to the surface area, the first temperature and the ambient temperature; determining the convective heat transfer coefficient corresponding to the target flow medium according to the Reynolds number, and the convective heat transfer coefficient includes The method includes the steps of: obtaining a laminar heat transfer coefficient and a turbulent heat transfer coefficient; obtaining a heat exchange area between a target flow medium and a target steel, obtaining a flow velocity corresponding to the target flow medium, and obtaining an average value from a first temperature interval; obtaining an initial temperature corresponding to the target flow medium according to the first temperature; calculating a first cooling temperature corresponding to the target flow medium according to the initial temperature, the convective heat transfer coefficient, the first temperature, the average value, the heat change value, the internal energy change value, and the heat loss value; sending a first temperature adjustment instruction to the spray system so as to control the spray system to adjust the initial temperature to the first cooling temperature, and cooling the target steel according to the first cooling temperature, where the initial temperature is the starting temperature corresponding to the water in the spray system.

[0009] By adopting the above technical solution to calculate the Reynolds number, Prandtl number and convective heat transfer coefficient, the physical properties and heat transfer capacity of the target flow medium can be accurately understood. Combined with the initial temperature, heat transfer area, flow rate and average value of the first temperature range of the target flow medium, the cooling temperature of the target flow medium can be accurately calculated, which helps to ensure that the steel achieves the required structure and performance during the cooling process, reduce the thermal stress and deformation of the iron during the cooling process, and thus improve the quality and dimensional accuracy of steel products.

[0010] Optionally, the Reynolds number is calculated using the following first formula: ; Wherein, Re represents the Reynolds number of the target flow medium, p represents the density of the target flow medium, v1 represents the flow velocity of the target flow medium, d represents the pipe diameter, and μ represents the dynamic viscosity of the target flow medium; The Prandtl number is calculated by the following second formula: ; Wherein, Pr represents the Prandtl number of the target flow medium, c1 represents the specific heat capacity of the target flow medium, μ represents the dynamic viscosity of the target flow medium, and λ represents the thermal conductivity of the target flow medium; The internal energy change is calculated using the following third formula: ΔQ1=m*ΔH; where ΔQ1 represents the internal energy change of the target steel, m represents the mass of the target steel, and ΔH represents the amount of heat absorbed per unit mass of the target steel during phase change. The heat loss value is calculated using the following fourth formula: ΔQ2=η*M*L; where ΔQ2 represents the heat loss value of the target flow medium, η represents the evaporation efficiency of the target flow medium, M represents the evaporation mass of the target flow medium, and L represents the heat absorbed by the target flow medium during the conversion. The heat change value is calculated using the following formula: ; Among them, ΔQ3 represents the heat change value of the target steel, represents the Stefan-Boltzmann constant, represents the emissivity of the target steel surface, A1 represents the surface area of ​​the target steel, T1 represents the first temperature of the target steel, T3 represents the ambient temperature, and t represents the cooling time. The convective heat transfer coefficient is calculated using the following formula: ; ; Wherein, h1 represents the laminar heat transfer coefficient in the convective heat transfer coefficient, h represents the turbulent heat transfer coefficient in the convective heat transfer coefficient, λ represents the thermal conductivity of the target flow medium, d represents the outer diameter of the tube, Re represents the Reynolds number of the target flow medium, and Rr represents the Prandtl number of the target flow medium; The first cooling temperature is calculated by the following formula: ; Among them, T m represents the first cooling temperature corresponding to the target flow medium, T0 represents the initial temperature corresponding to the target flow medium, T1 represents the first temperature of the target steel, T2 represents the average value corresponding to the first temperature interval, c1 represents the specific heat capacity corresponding to the target flow medium, h represents the convective heat transfer coefficient, when the Reynolds number is greater than the preset threshold, the convective heat transfer coefficient is the turbulent heat transfer coefficient h2, when the Reynolds number is less than or equal to the preset threshold, the convective heat transfer coefficient is the laminar heat transfer coefficient h1, A2 represents the heat transfer area, m represents the mass of the target steel, ΔQ1 represents the internal energy change value, ΔQ2 represents the heat loss value, and ΔQ3 represents the heat change value.

[0011] By adopting the above technical solution and using the Reynolds number formula, the flow state of the target flow medium in the pipeline, i.e. laminar flow or turbulent flow, can be accurately predicted. The Prandtl number reflects the relative size of the momentum diffusion capacity and heat diffusion capacity of the fluid, and is an important dimensionless number in heat transfer analysis. Calculate the internal energy change value of the target steel. The internal energy change value can fully grasp the energy change of the target steel during the cooling process, and then calculate the heat loss value of the target flow medium to avoid cooling temperature deviation due to heat loss not being considered. Calculate the heat change value of the target steel to fully consider the heat transfer during the cooling process, making the cooling temperature more accurate. By calculating the Prandtl number, the heat transfer characteristics of the fluid can be better understood; according to the size of the Reynolds number, select the appropriate convective heat transfer coefficient formula for calculation, which can more accurately calculate the heat transfer rate between the fluid and the solid surface, taking into account the initial temperature, convective heat transfer coefficient, target temperature, etc. The first temperature of the target steel, the average value of the first temperature range, specific heat capacity, heat exchange area and steel mass, heat change value of the steel, internal energy change value and heat loss of the flow medium are taken into consideration, so that the calculated first cooling temperature can accurately reflect the temperature that the target flow medium should reach during the actual cooling process. Based on the precise first cooling temperature, a temperature adjustment instruction is sent to the spray system, which can enable the steel to be cooled according to a predetermined temperature curve during the cooling process, avoiding problems such as uneven steel structure and performance, excessive residual stress, etc. caused by inappropriate cooling temperature, improving cooling efficiency and quality, and ensuring the comprehensive performance of the final product.

[0012] Optionally, after sending a first temperature adjustment instruction to the spray system to control the spray system to adjust the initial temperature to the first cooling temperature and perform a cooling operation on the target steel according to the first cooling temperature, the method further includes: obtaining target temperatures of the target steel at multiple time points to obtain a temperature change curve; calculating the temperature difference between the target temperatures corresponding to any two adjacent time points to obtain multiple temperature differences; determining whether the first temperature difference and the second temperature difference are both less than a preset temperature threshold, the first temperature difference and the second temperature difference being any two adjacent temperature differences among the multiple temperature differences; when the first temperature difference and the second temperature difference are both less than the preset temperature threshold, determining that the cooling rate of the target steel has reached a stable cooling state; obtaining a fourth temperature corresponding to the temperature change curve in the stable cooling state; calculating a second cooling temperature corresponding to the target flow medium based on the first cooling temperature, the fourth temperature, the average value corresponding to the first temperature interval, the convective heat transfer coefficient, the heat change value, the internal energy change value, and the heat loss value; generating a second temperature adjustment instruction based on the second cooling temperature, and sending the second temperature adjustment instruction to the spray system to cause the spray system to adjust the first cooling temperature to the second cooling temperature and perform cooling control on the target steel according to the second cooling temperature.

[0013] By adopting the above technical solution, the target temperature of the target steel is obtained at multiple time points and a temperature change curve is plotted, providing an intuitive and comprehensive understanding of the temperature change trend of the steel during the cooling process. The temperature difference between the target temperatures corresponding to any two adjacent time points is calculated, and it is determined whether the temperature difference between any two adjacent temperature differences is less than a preset temperature threshold. When this condition is met, the cooling rate of the target steel is determined to have reached a stable cooling state. This determination method can accurately identify the moment when the cooling process enters a stable stage, avoiding inaccurate operations during unstable cooling stages. After determining that the cooling process has entered a stable cooling state, a fourth temperature corresponding to the temperature change curve at this state is obtained. The fourth temperature is then incorporated into the calculation of the second cooling temperature, making the calculation result more consistent with actual cooling requirements. The second cooling temperature corresponding to the target flow medium is calculated based on multiple parameters such as the first cooling temperature, the fourth temperature, the average value corresponding to the first temperature interval, the convective heat transfer coefficient, the heat change value, the internal energy change value, and the heat loss value. This calculation method, which comprehensively considers multiple factors, can more accurately determine the temperature that the flow medium should reach in the stable cooling state, ensuring that the cooling process proceeds according to the expected cooling curve and improving cooling accuracy.

[0014] Optionally, determining a cooling method for the target steel based on the comparison result and the cooling time specifically includes: obtaining a volume corresponding to the target steel and obtaining an ambient temperature; calculating a cooling efficiency corresponding to the target steel based on the cooling time, the volume, the ambient temperature, and the first temperature; determining whether the cooling efficiency is within a preset first efficiency range, where the preset first efficiency range is a cooling efficiency range achievable by a water cooling method; when the cooling efficiency is within the preset first efficiency range, determining that the cooling method for the target steel is a water cooling method; When the cooling efficiency is not in the preset first efficiency range, determine whether the cooling efficiency is in the preset second efficiency range, and the preset second efficiency range is the cooling efficiency range that can be achieved by the water-oil alternating cooling method; when the cooling efficiency is in the preset second efficiency range, determine that the cooling method of the target steel is the water-oil alternating cooling method; when the cooling efficiency is not in the preset second efficiency range, determine whether the cooling efficiency is in the preset third efficiency range, and the preset third efficiency range is the cooling efficiency range that can be achieved by the oil cooling method; when the cooling efficiency is in the preset third efficiency range, determine that the cooling method of the target steel is the oil cooling method.

[0015] Using the above technical solution, the cooling efficiency is compared with different preset efficiency ranges to determine whether to use water cooling, alternating water-oil cooling, or oil cooling. Because different cooling methods have different cooling characteristics, the cooling efficiency calculation takes into account multiple factors such as cooling time, the volume of the target steel, ambient temperature, and the first temperature. These factors will affect the cooling process of the target steel. Comprehensive consideration of these factors can more accurately reflect the actual situation of the steel during the cooling process, thereby providing a more reliable basis for the selection of cooling method. Accurately selecting a cooling method can effectively reduce defects generated during the cooling process, such as thermal stress cracks and coarse microstructure. The appropriate cooling method can make the temperature change of steel more uniform during the cooling process, reduce internal stress, reduce the occurrence of defects, and improve the product qualification rate.

[0016] Optionally, calculate the cooling efficiency using the following formula: ; Wherein, E represents the cooling efficiency, A2 represents the heat exchange area, V represents the volume of the target steel, T1 represents the first temperature, T3 represents the ambient temperature, t represents the cooling time, P represents the density of the target steel, a represents the constant of the ambient fluid, v2 represents the ambient fluid velocity, c2 represents the specific heat capacity of the target steel, h3 represents the natural convection heat transfer coefficient, f (A2, V, K) represents the shape correction coefficient of the target steel, and K represents the degree of irregularity of the shape of the target steel.

[0017] The above technical solution comprehensively considers various factors that affect the cooling effect, introduces the constants and velocity of the ambient fluid, and makes the calculation of the cooling efficiency closer to the actual cooling environment. The shape correction parameter considers the influence of the shape and irregularity of the target steel on the cooling efficiency. Based on the comparison between the calculated cooling efficiency and the efficiency range corresponding to different preset cooling methods, it can scientifically determine which cooling method to use. Accurate selection of the cooling method can meet the cooling needs of different steels during the processing process.

[0018] Optionally, based on the comparison result and the cooling time, a cooling method for the target steel is determined, specifically including: when the first temperature is not in the first temperature range and the first temperature is not in the second temperature range, obtaining a first threshold from the first temperature range, the first threshold being the maximum value in the first temperature range; judging whether the first temperature is greater than the first threshold; when the first temperature is greater than the first threshold, judging whether the cooling time is equal to a preset time; when the cooling time is equal to the preset time, determining that the cooling method for the target steel is a water-oil alternating cooling method.

[0019] By employing this technical solution, the target steel's first temperature is first determined to be within the first and second temperature ranges. If the first temperature exceeds the first and second temperature ranges, a comparison with a first threshold within the first temperature range, combined with a determination of the cooling duration, determines whether to employ alternating water-oil cooling. This intelligent switching mechanism ensures the target steel receives the most effective cooling method within the appropriate temperature range. Alternating water-oil cooling combines the advantages of both water and oil cooling media, achieving optimal results at different cooling stages.

[0020] In a second aspect of the present application, a temperature control device for steel processing is provided, the device comprising an acquisition unit, a processing unit and a determination unit; the acquisition unit acquires temperature parameters corresponding to the target steel, and determines cooling control of the target steel according to the temperature parameters, the target steel being the steel in the processing stage; the material information of the target steel is acquired, and a first temperature interval and a second temperature interval are determined according to the material information, the first temperature interval being the cooling temperature interval required for water cooling, the second temperature interval being the cooling temperature interval required for oil cooling, and the minimum value of the first temperature interval being greater than the maximum value of the second temperature interval; the first temperature of the target steel is acquired, the first temperature is compared with the first temperature interval and the second temperature interval to obtain a comparison result, the first temperature being the temperature measured using infrared temperature measurement. The instrument scans the target steel and obtains the temperature; the processing unit determines the cooling method for the target steel according to the comparison result and the cooling time, and the cooling methods include water cooling, oil cooling and water-oil alternating cooling; if it is determined that the cooling method of the target steel is the water-oil alternating cooling method, the spray system is controlled to cool the target steel according to the first temperature range to obtain a second temperature of the target steel; it is determined whether the second temperature is within the first temperature range; when the second temperature is within the first temperature range, the oil cooling system is controlled to cool the target steel according to the second temperature range to obtain a third temperature; it is determined whether the third temperature is within the second temperature range; if the determination unit determines that the third temperature is within the second temperature range, it is determined that the cooling operation of the target steel has been completed.

[0021] In a third aspect of the present application, an electronic device is provided, which includes a processor, a memory, a user interface and a network interface, the memory is used to store instructions, the user interface and the network interface are used to communicate with other devices, and the processor is used to execute the instructions stored in the memory, so that an electronic device executes any one of the methods described above in the present application.

[0022] In a fourth aspect of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores instructions, and when the instructions are executed, any one of the above methods of the present application is executed.

[0023] In summary, one or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: 1. First, obtain the material information of the target steel. Based on this material information, determine the first and second temperature ranges for water cooling and oil cooling, respectively. Then, use an external thermometer to obtain the target steel's first temperature in real time and dynamically compare it with the first and second temperature ranges to obtain a comparison result. Based on the comparison result, dynamically select water cooling, oil cooling, or alternating water-oil cooling. This solves the problem of traditional cooling methods being fixed and unable to adapt to material differences. For high-temperature areas, a spray system is used to quickly lower the steel temperature to the first temperature range, achieving efficient heat dissipation and reducing the risk of high-temperature oxidation or decarburization. After the steel temperature drops to the second temperature range, oil cooling is switched to slow the cooling rate to avoid stress concentration or increased brittleness caused by rapid cooling. After cooling, the cooling process is ensured to meet expectations by determining whether the second temperature after cooling is within the first temperature range and whether the third temperature is within the second temperature range. If the second or third temperature does not meet the standard, the cooling parameters can be adjusted or the cooling time can be extended. This can avoid substandard performance due to insufficient cooling or cracking due to excessive cooling, ensuring the overall performance of the final product.

[0024] 2. Calculating the Reynolds number, Prandtl number, and convective heat transfer coefficient can accurately understand the physical properties and heat transfer capacity of the target flow medium. Combined with the initial temperature, heat transfer area, flow rate, and average value of the first temperature interval of the target flow medium, the cooling temperature of the target flow medium can be accurately calculated, which helps to ensure that the steel achieves the required structure and performance during the cooling process, reduce the thermal stress and deformation of the iron during the cooling process, and thus improve the quality and dimensional accuracy of the steel products. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a flow chart of a temperature control method for steel processing provided in an embodiment of the present application; Figure 2 This is a schematic structural diagram of a temperature control device for steel processing provided in an embodiment of the present application; Figure 3 This is a structural diagram of an electronic device disclosed in an embodiment of the present application.

[0026] Explanation of the reference numerals: 201, acquisition unit; 202, processing unit; 203, determination unit; 300, electronic device; 301, processor; 302, memory; 303, user interface; 304, network interface; 305, communication bus. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments.

[0028] In the description of the embodiments of this application, words such as "for example" or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "for example" or "for instance" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "for example" or "for instance" is intended to present the relevant concepts in a concrete manner.

[0029] In the description of the embodiments of the present application, the term "multiple" means two or more. For example, multiple systems refer to two or more systems, and multiple screen terminals refer to two or more screen terminals. In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0030] During the processing of steel materials, since different application scenarios have different requirements for product size and mechanical properties, steel raw materials are processed into products that meet technical standards through different processing techniques. When hot processing steel, after the steel is heated to meet the requirements, the heated steel needs to be cooled, but the current cooling methods mostly adopt a fixed method, and the fixed method cannot meet the cooling requirements of different steels, resulting in performance defects in the cooled products. The present application provides a temperature control method for steel processing. When cooling steel, the cooling method is dynamically adjusted according to the actual situation of the steel. By adjusting the cooling method in time, substandard performance due to insufficient cooling or the risk of cracking due to excessive cooling can be avoided, thereby ensuring the comprehensive performance of the final product. The technical solution of the present application is described in detail. The embodiment of the present application provides a temperature control method for steel processing, which is applied to the terminal of the processing equipment. The terminal of the present application can be a platform that provides temperature control services for steel processing, Figure 1 This is a flow chart of a temperature control method for steel processing provided in an embodiment of the present application, with reference to Figure 1 The method includes the following steps S101-S109.

[0031] S101: Acquire temperature parameters corresponding to target steel, and determine cooling control for the target steel according to the temperature parameters.

[0032] In S101 above, the target steel refers to steel undergoing a hot-working process. An infrared thermometer is used to scan the target steel during this process, obtaining its surface temperature as a temperature parameter. Infrared thermometers can measure surface temperature non-contact and are suitable for steel processing in high-temperature environments. For example, if the target steel is undergoing a hot-rolling process, a surface temperature of 850°C may be obtained by scanning the target steel using an infrared thermometer.

[0033] In addition, after obtaining the temperature parameters corresponding to the target steel, the temperature parameters are judged to determine whether cooling control is required. The temperature parameters corresponding to the target steel are obtained, and cooling control of the target steel is determined according to the temperature parameters, specifically including: obtaining the target deformation and the first temperature corresponding to the target steel, the target deformation is the change in the target structure of the target steel during the processing process, and the target structure includes a geometric shape and an internal structure, and the first temperature and the target deformation are output as temperature parameters; determining the preset working temperature and the preset deformation according to the process requirements of the target steel; judging whether the first temperature is greater than or equal to the preset working temperature, and whether the target deformation is greater than or equal to the preset deformation; when the first temperature is greater than or equal to the preset working temperature, and the target deformation is greater than or equal to the preset deformation, determining to cool the target steel.

[0034] Specifically, the target structure of the target steel will change during processing. The target structure refers only to its geometric shape and internal structure. The change in the target structure, i.e., the target deformation, can be obtained. The target deformation can be obtained using measurement tools, such as a laser rangefinder or a 3D scanner. Alternatively, the deformation of the target steel can be monitored in real time during processing, and the target deformation value recorded. The specific method used to obtain the target deformation can be selected based on actual conditions and is not specifically defined here. A temperature sensor is then used to measure the temperature of the target steel in real time to obtain a first temperature. The temperature sensor, such as a thermocouple or infrared thermometer, outputs the obtained first temperature and the target deformation as temperature parameters. For example, during processing, the deformation of the target steel is measured using a 3D scanner and the target deformation is 0.5 mm. The temperature of the target steel is then measured using a thermocouple and the first temperature is 850°C. The first temperature of 850°C and the target deformation of 0.5 mm are output as temperature parameters. The processing requirements of the target steel are then analyzed, including the material properties, the stress-strain state during processing, and the performance requirements of the final product. Based on process requirements, a preset operating temperature and a preset deformation are determined. The preset operating temperature is the temperature range that the target steel should reach or maintain during processing, and the preset deformation is the maximum deformation allowed during processing. For example, if the processing of the target steel requires plastic deformation at high temperatures and the final product has high dimensional accuracy, the preset operating temperature is determined to be 800°C to 900°C, and the preset deformation is determined to be 0.8mm. A first temperature and a target deformation are obtained from the output temperature parameters. The first temperature is compared with the preset operating temperature to determine whether it is greater than or equal to the preset operating temperature. The target deformation is compared with the preset deformation to determine whether it is greater than or equal to the preset deformation. If the first temperature is greater than the preset operating temperature and the target deformation is greater than or equal to the preset deformation, the hot working of the target steel is deemed to have met the processing requirements, and cooling control is performed on the target steel. Cooling control can be achieved through a spray system, oil cooling system, or other cooling device. A corresponding cooling control instruction is generated and sent to the cooling system to execute the cooling operation. In addition, if the first temperature is lower than the preset working temperature, or the target deformation is lower than the preset deformation, it is assumed that the target steel still needs to be hot-processed. At this time, the target steel has not yet met the hot processing requirements. The target steel can only be cooled and controlled when the first temperature is higher than the preset working temperature and the target deformation is higher than or equal to the preset deformation.

[0035] S102: Obtain material information of the target steel, and determine a first temperature range and a second temperature range based on the material information, wherein the first temperature range is a cooling temperature range to be reached by water cooling, and the second temperature range is a cooling temperature range to be reached by oil cooling.

[0036] In S102 above, after determining that cooling control is required for the target steel, material information of the target steel, such as steel grade and chemical composition, can be obtained. Steel can be categorized based on its core components into carbon structural steel, low-alloy high-strength steel, stainless steel, tool steel, and high-temperature alloys. After hot processing of the target steel, different steel materials correspond to different temperatures. When cooling the target steel, the cooling method is selected based on the steel's current temperature. Therefore, based on the material information, a relevant heat treatment manual or database is consulted to determine the first and second temperature ranges corresponding to the steel material. The first temperature range refers to the temperature range to be achieved after water cooling, and the second temperature range refers to the temperature range to be achieved after oil cooling. The database stores historical cooling methods used for steel materials with different material information during processing, as well as the temperature ranges corresponding to each cooling method. Typically, the minimum value of the first temperature range is greater than the maximum value of the second temperature range to ensure differentiation between water cooling and oil cooling.

[0037] For example, the target steel is carbon structural steel. After consulting the manual, it is determined that its first temperature range is 250°C to 150°C, that is, the temperature range reached after cooling with water, and the second temperature range is 50°C to 140°C, that is, the temperature range reached after cooling with oil. Different material information corresponds to different first and second temperature ranges. It is necessary to select the first and second temperature ranges that match the material information.

[0038] S103: Acquire a first temperature of the target steel, compare the first temperature with the first temperature interval and the second temperature interval, and obtain a comparison result.

[0039] In the above S103, after the target steel is scanned using an infrared thermometer to obtain a first temperature, the first temperature refers to the current temperature corresponding to the target steel, and then the first temperature is compared with the first temperature interval and the second temperature interval to determine in which interval the first temperature is located or whether it is located outside the two intervals.

[0040] S104: Determine a cooling method for the target steel based on the comparison result and the cooling time.

[0041] In S104, the cooling method for the target steel is determined based on the comparison result and the cooling time. The cooling time is determined based on the heat treatment process requirements. Cooling methods include water cooling, oil cooling, and alternating water-oil cooling. Water cooling involves using water for the entire cooling process; oil cooling involves using oil for the entire cooling process; and alternating water-oil cooling involves using both water and oil throughout the cooling process. The target steel is first rapidly cooled using water, then slowly cooled using oil after cooling to a certain intermediate temperature.

[0042] In addition, based on the comparison result and the cooling time, the cooling method for the target steel is determined, specifically including: obtaining the volume corresponding to the target steel and obtaining the ambient temperature; calculating the cooling efficiency corresponding to the target steel based on the cooling time, volume, ambient temperature and first temperature; judging whether the cooling efficiency is in a preset first efficiency range, the preset first efficiency range is the cooling efficiency range achievable by the water cooling method; when the cooling efficiency is in the preset first efficiency range, determining that the cooling method of the target steel is the water cooling method; when the cooling efficiency is not in the preset first efficiency range, judging whether the cooling efficiency is in a preset second efficiency range, the preset second efficiency range is the cooling efficiency range achievable by the water-oil alternating cooling method, and the preset first efficiency range is greater than the preset second efficiency range; when the cooling efficiency is in the preset second efficiency range, determining that the cooling method of the target steel is the water-oil alternating cooling method; when the cooling efficiency is not in the preset second efficiency range, judging whether the cooling efficiency is in a preset third efficiency range, the preset third efficiency range is the cooling efficiency range achievable by the oil cooling method, and the preset second efficiency range is greater than the preset third efficiency range; when the cooling efficiency is in the preset third efficiency range, determining that the cooling method of the target steel is the oil cooling method.

[0043] Specifically, the volume can be obtained according to the geometric shape of the target steel. The corresponding geometric volume formula can be selected for calculation according to different geometric shapes, such as cuboid, cylinder, etc. The volume of cuboid V=length*width*height, the volume of cylinder V=πr 2 h, where r is the bottom radius and h is the height. If the target steel has an irregular shape, the surface of the target steel can be scanned using 3D scanning technology, and then the volume can be calculated using 3D modeling software. A temperature sensor is installed in the cooling environment where the target steel is located in advance. The temperature sensor can measure the ambient temperature in real time and send the ambient temperature. When calculating the cooling efficiency corresponding to the target steel based on the cooling time, volume, ambient temperature and the first temperature, first determine the calculation formula for the cooling efficiency, and calculate the cooling efficiency using the following formula: ; Wherein, E represents cooling efficiency, which is the ratio of the heat transferred during the cooling process of the target steel to the total heat of the target steel, and measures the cooling effect. A2 represents the heat exchange area, V represents the volume of the target steel, T1 represents the first temperature, T3 represents the ambient temperature, t represents the cooling time, P represents the density of the target steel, a represents the constant of the ambient fluid, v2 represents the ambient fluid velocity, c2 represents the specific heat capacity of the target steel, h3 represents the natural convection heat transfer coefficient, f (A2, V, K) represents the shape correction coefficient of the target steel, K represents the degree of irregularity of the shape of the target steel, V represents the volume of the target steel, the heat exchange area A2 can be obtained by measuring the surface area of ​​the target steel, the cooling time t refers to the time required according to the process requirements for the target steel, the first temperature T1 can be obtained by measuring the surface temperature of the target steel with an infrared thermometer, the specific heat capacity c2 of the target steel can be found in the relevant material manual according to the material of the target steel, and the natural convection heat transfer coefficient h3 can be obtained from experimental measurements. The shape correction factor f(A2, V, K) can be obtained by establishing a database of shape correction factors for steels of different shapes and irregularities through experiments or numerical simulations, and then looking it up from the database based on the specific shape and irregularity K of the target steel. It can also be calculated based on a specific mathematical model. The above cooling efficiency calculation formula is obtained by converting it into the following formula: ; Formula decomposition: Part 1, convective heat transfer formula: D=h4*A2*(T1-T3)*t, where h4 represents the heat transfer coefficient, taking into account the effects of natural convection and forced convection, A2 represents the heat transfer area, T1-T3 represents the temperature difference driving force, and t represents the cooling time.

[0044] The second part is the heat storage formula of the target steel: D=m*c2, where m represents the mass of the target steel, which can be measured by weighing equipment, m=PV, and C2 represents the specific heat capacity of the target steel.

[0045] In the improved part, the heat transfer coefficient h4=h3+a*v2, where h3 represents the heat transfer coefficient of natural convection, av2 is the forced convection term related to the fluid velocity v2, and the shape correction coefficient f(A2,V,K) takes into account the influence of the shape and irregularity K of the target steel on the cooling efficiency. Therefore, by introducing the calculation formulas obtained in the first part, the second part and the improved part, the cooling efficiency of the target steel under specific conditions can be accurately quantified, making the calculation results more accurate.

[0046] This embodiment is used in a scenario where target steel undergoes heat treatment. After reaching a certain temperature, cooling is required. During this cooling process, the required cooling efficiency of the target steel must be calculated, and then an appropriate cooling method is selected based on this efficiency. This cooling efficiency calculation not only considers parameters related to heat, but also the shape and irregularity of the target steel, known as the shape correction factor. The following experimental set of tests demonstrates that the shape and irregularity of the target steel affect cooling efficiency, which is why this embodiment incorporates the shape correction factor into the aforementioned calculation formula.

[0047] The relationship between the changes in various parameters in the shape correction factor and the target steel cooling efficiency was determined based on the following five sets of experiments: A2=2.0m in experimental group 1 2 ,V=0.040m 3 , K=1, this is the baseline group, assuming that the target steel is a regular body (such as a standard plate or a regular cylinder), with a moderate surface area A2, a medium volume V, and a very regular shape (K=1.00), for subsequent comparison. In experimental group 2, A2=1.8m 2 ,V=0.040m 3 , K = 1.2, the volume V remains unchanged, the surface area A2 is slightly reduced, and the shape irregularity coefficient K is increased to 1.2 (such as the surface has protrusions or holes). At this time, the experimental group 3 verifies the inhibitory effect of irregular bodies on cooling efficiency. In the experimental group 3, A2 = 2.5m 2 ,V=0.080m 3 , K=1, large volume and large surface area regular body (such as large steel plate), used to analyze the change of cooling efficiency after the overall geometric enlargement. In experimental group 4, A2=2.0m 2 ,V=0.040m 3 , K=1.5, based on experimental group 1, the irregular coefficient K is significantly increased to test the cooling efficiency of highly irregular bodies. In experimental group 5, A2=2.0m 2 ,V=0.040m 3 , K=2, based on experimental group 1, the irregularity coefficient (K=2) is extremely increased to test the cooling efficiency limit of highly complex structures.

[0048] The above experiments show that, given the same volume, the larger the surface area and the more regular the shape, the higher the calculated cooling efficiency. This is because more surface area is in contact with the medium. For the same surface area, as the volume V increases, the calculated cooling efficiency decreases. When the surface area and volume remain constant, K increases and E significantly decreases, and the cooling efficiency of irregular bodies (such as porous and complex parts) decreases. Cooling efficiency is low for large volumes or high irregularities. Therefore, the above experimental set of results confirms that the shape and irregularity K of the target steel affect cooling efficiency.

[0049] For example, the target steel's first temperature T1 = 200°C = 473.15K, the ambient temperature T3 = 20°C = 293.15K, and the target steel density P = 7850kg / m 3 , the volume of target steel is V=1m 3 , target steel specific heat capacity c2 = 500 J (kg.k), heat transfer area A2 = 2m 2 , convection heat transfer coefficient h3=10W / (m 2 .K), cooling time t=60s, ambient fluid constant a=5W / m 2 , ambient fluid velocity v2 = 2m / s, assuming the target steel shape is a simple geometric body, the correction factor is a constant, and the shape correction factor f (A2, V, K) = 1.2. Substitute each parameter into the cooling efficiency calculation formula to calculate the cooling efficiency E, the calculation formula is: ; Substitute into the numerical calculation: First calculate the heat transfer coefficient h4=h3+av2, substitute the value h4=10+5*2=20W / (m 2 .K), then calculate the mass of steel m=PV, substitute the value m=7850*0.01=78.5kg (0.01 is obtained by converting the unit of volume), and then calculate the cooling efficiency E, the calculation formula is: ; Substitute the data, h4=20W / (m 2 .K), A2=2m 2 , T1-T3=180K, t=60s, m=78.5kg, c=500J / kg, calculate E=(20*2*180*60) / 78.5*500=11, then introduce the shape correction parameter f(A2,V,K)=1.2, E1=E*f(A2,V,K)=11*1.2=13.2w, and the final cooling efficiency is 13.2w.

[0050] After obtaining the cooling efficiency corresponding to the target steel using the cooling efficiency calculation formula, the calculated cooling efficiency is compared with a preset first efficiency range. This preset first efficiency range is the cooling efficiency range achievable by water cooling, determined through experiments or theoretical analysis. When the cooling efficiency is within the preset first efficiency range, water cooling is determined for the target steel. The control system sends a start command to the water cooling system, and the water cooling system begins operating to cool the target steel. A water cooling system typically includes equipment such as a water pump, water pipes, and nozzles. The water pump delivers water to the nozzles, which spray water onto the surface of the target steel to achieve rapid cooling. In the above example, if E = 13.2, the preset first efficiency range can be defined as [10.1-20]. At this point, the cooling efficiency is within the preset first efficiency range, so the water cooling system is activated to cool the target steel using water cooling.

[0051] Furthermore, when the cooling efficiency is not within the preset first efficiency range, the cooling efficiency is compared with a preset second efficiency range. This preset second efficiency range is a predetermined range of cooling efficiencies achievable with the water-oil alternating cooling method. When the cooling efficiency is within this second range, the water-oil alternating cooling method is determined to be employed for the target steel. A water-oil alternating cooling system typically consists of a water cooling subsystem and an oil cooling subsystem, with the control system controlling the timing and sequence of the alternating spraying of water and oil. For example, if the cooling efficiency E = 7.8 calculated in another run, the preset second efficiency range can be set to [4.1-10]. Since 7.8 is within this range, the water-oil alternating cooling method is determined to be employed for the target steel. The water-oil alternating cooling method involves spraying water for a period of time, then stopping the water spraying and spraying oil for a period of time, and repeating this cycle.

[0052] Furthermore, when the cooling efficiency is neither within the preset first efficiency range nor within the preset second efficiency range, a determination is made as to whether the cooling efficiency is within a preset third efficiency range. The preset third efficiency range is a predetermined cooling efficiency range achievable by the oil cooling method. If the cooling efficiency is within the preset third cooling efficiency range, the target steel is determined to be cooled using oil cooling. The control system sends a start command to the oil cooling system, and the oil cooling system begins operating. The oil cooling system typically includes an oil pump, oil pipes, and nozzles. The oil pump delivers oil to the nozzles, which spray the oil onto the target steel surface to achieve cooling. For example, if the cooling efficiency E is calculated again and is 2.3, the preset third efficiency range can be set to [0-4]. In this case, the cooling efficiency is within the preset third efficiency range, and oil cooling is determined to be appropriate for the target steel. The control system activates the oil cooling system, and oil is sprayed from the nozzles to cool the target steel. During cooling, water cooling usually has a higher cooling efficiency because water has a high thermal conductivity and can quickly take away heat, so the cooling efficiency corresponding to the water cooling method is the highest; the cooling efficiency of oil cooling is relatively low because the thermal conductivity of oil is smaller than that of water; the cooling efficiency of water-oil alternating cooling is between the two, and will vary according to the alternating time and ratio, that is, the preset first efficiency interval is greater than the preset second efficiency interval, and the preset second efficiency interval is greater than the preset third efficiency interval.

[0053] In one possible embodiment, based on the comparison result and the cooling time, the cooling method for the target steel is determined, specifically including: when the first temperature is not in the first temperature interval and the first temperature is not in the second temperature interval, obtaining a first threshold value from the first temperature interval, the first threshold value being the maximum value in the first temperature interval; judging whether the first temperature is greater than the first threshold value; when the first temperature is greater than the first threshold value, judging whether the cooling time is greater than or equal to a preset time; when the cooling time is greater than or equal to the preset time, determining that the cooling method for the target steel is a water-oil alternating cooling method. Specifically, first clarify the range of the first temperature interval and the second temperature interval. For example, the first temperature interval can be set to 150°C to 250°C, and the second temperature interval can be set to 500°C to 140°C. Obtain the current first temperature of the target steel, and then judge whether the first temperature falls within the first temperature interval or the second temperature interval. In the above example, the current first temperature of the target steel is 260°C. The first temperature is compared with the first and second temperature intervals. 260°C is not within the first temperature interval (150°C to 250°C) or the second temperature interval (50°C to 1400°C). Based on the settings for the first temperature interval, a first threshold is determined. The first threshold is the maximum value within the first temperature interval, and the maximum value is directly read from the first temperature interval as the first threshold. The current first temperature of the target steel is compared with the first threshold. For example, if the current first temperature of the target steel is 260°C and the first threshold is 250°C, and the first temperature is greater than the first threshold, the cooling time required for the target steel (i.e., the cooling time) is determined based on process requirements. The cooling time is then compared with a preset time, which is the time required for water-oil alternating cooling. If the first temperature is greater than the first threshold and the cooling time is equal to the preset time, the target steel is determined to be cooled using water-oil alternating cooling. For example, the cooling time is 2 minutes and the preset time is 1 minute. At this time, the preset time refers to the time spent on cooling using the water-oil cooling method. At this time, it can be determined that the target steel will be cooled using the water-oil alternating cooling method.

[0054] Furthermore, when the first temperature is less than or equal to a first threshold, a determination is made as to whether the first temperature is greater than a second threshold, which is the maximum value within the second temperature range. When the first temperature is greater than the second threshold, a determination is made as to whether the cooling time is less than a preset time. If the cooling time is less than the preset time, the target steel is determined to be cooled using water cooling. If the cooling time is greater than the preset time, the target steel is determined to be cooled using oil cooling. Specifically, a temperature sensor measures the current temperature of the target steel, i.e., the first temperature, in real time. A first threshold is determined based on the first temperature range, which is the maximum value within the first temperature range. The first temperature is compared with the first threshold to determine whether the first temperature is less than or equal to the first threshold. If the first temperature is less than or equal to the first threshold, a second threshold is determined based on the second temperature range, which is the maximum value within the second temperature range. If the first temperature is less than or equal to the first threshold, the first temperature is compared with the second threshold to determine whether the first temperature is greater than the second threshold. For example, if the first temperature is 145°C and the first threshold is 250°C, the first temperature is less than the first threshold, and the second threshold is 140°C, the first temperature is greater than the second threshold. When the first temperature is greater than the second threshold, the cooling time is compared with a preset time to determine whether it is less than the preset time. Since the preset time refers to the time required for alternating water and oil cooling, if the cooling time is less than the preset time, water cooling is determined to be appropriate for the target steel. Since water cooling is faster than oil cooling, water cooling is selected when the cooling time is short. For example, if the cooling time is 50 seconds and the preset time is 1 minute, water cooling is selected if the cooling time is less than the preset time. If the cooling time is greater than the preset time, oil cooling is determined to be appropriate for the target steel, since oil cooling is slower.

[0055] S105: If it is determined that the cooling method of the target steel is the water-oil alternating cooling method, the spray system is controlled to perform a cooling operation on the target steel according to the first temperature range to obtain a second temperature of the target steel.

[0056] In S105, after comparing the results and the cooling time to determine the appropriate cooling method for the target steel, if the cooling method is alternating water-oil cooling, the spray system is activated, using water as the cooling medium to spray cool the target steel. The spray system's flow rate, pressure, and spray time are controlled to ensure that the temperature of the target steel decreases to near the lower limit of the first temperature range at a predetermined rate. During or after the cooling process, the target steel is scanned again using an infrared thermometer to obtain a second temperature.

[0057] In addition, the spray system is controlled to perform a cooling operation on the target steel according to the first temperature range, specifically including: calculating the Reynolds number corresponding to the target flow medium according to the first formula, the target flow medium including a water medium or an oil medium; calculating the Prandtl number corresponding to the target flow medium according to the second formula; calculating the internal energy change value corresponding to the internal structure of the target steel according to the third formula; calculating the heat loss value caused by evaporation of the target flow medium according to the fourth formula; obtaining the surface area and ambient temperature of the target steel, and calculating the heat change value corresponding to the target steel according to the surface area, the first temperature and the ambient temperature; determining the convective heat transfer coefficient corresponding to the target flow medium according to the Reynolds number, and the convective heat transfer coefficient includes laminar heat transfer coefficient and turbulent heat transfer coefficient; obtaining a heat exchange area between a target flow medium and a target steel, and obtaining a flow velocity corresponding to the target flow medium, and obtaining an average value from a first temperature interval; obtaining an initial temperature corresponding to the target flow medium according to the first temperature; calculating a first cooling temperature corresponding to the target flow medium according to the initial temperature, the convective heat transfer coefficient, the first temperature, the average value, the heat change value, the internal energy change value, and the heat loss value; sending a first temperature adjustment instruction to the spray system to control the spray system to adjust the initial temperature to the first cooling temperature, and cooling the target steel according to the first cooling temperature, where the initial temperature is the starting temperature corresponding to the water in the spray system.

[0058] Specifically, if a spray system is used to cool the target steel, the water in the spray system will serve as the target flow medium. If an oil cooling system is used to cool the target steel, the oil in the oil cooling system will serve as the target flow medium. Therefore, the target flow medium is determined according to the cooling method currently corresponding to the target steel. Since a spray system is currently used to cool the target steel, the initial temperature for water cooling the target steel is determined according to the first temperature. After the water is set to the initial temperature, the target steel begins to be cooled. After the target steel is cooled at the initial temperature, the target steel is monitored in real time. The temperature of the target flow medium can be dynamically adjusted so that the temperature of the target flow medium is adjusted according to the cooling of the target steel, thereby avoiding the problem of poor cooling effect due to the fixed temperature of the target flow medium. The cooling temperature currently corresponding to the target flow medium can be determined by the following cooling temperature calculation formula. At this time, the target flow medium is a water medium. The first formula is then used to calculate the Reynolds number of the target flow medium. The Reynolds number is calculated by the following first formula: Where Re represents the Reynolds number of the target flow medium, p represents the density of the target flow medium, v1 represents the flow velocity of the target flow medium, d represents the pipe diameter, and μ represents the dynamic viscosity of the target flow medium. For water or oil, the density p and dynamic viscosity μ can be obtained by consulting relevant manuals or using measuring instruments. The flow velocity v can be measured using a flow meter, while the pipe diameter d is a known design parameter. Since water is sprayed onto the target steel through a pipe for cooling, oil can also be delivered to the target steel through a pipe and then poured or sprinkled onto it. For example, assuming the target flow medium is water with a density p = 1000 kg / m3, a dynamic viscosity μ = 0.001 Pa / cm2, a flow velocity v1 = 2 m / s, and a pipe diameter d = 0.05 m, the Reynolds number can be calculated using the first formula: Re = (1000 * 2 * 0.05) / 0.001 = 100,000.

[0059] Then, the Prandtl number corresponding to the target flow medium is calculated according to the second formula. The Prandtl number can be calculated by the following second formula: Where Pr represents the Prandtl number of the target flow medium, c1 represents the specific heat capacity of the target flow medium, μ represents the dynamic viscosity of the target flow medium, and λ represents the thermal conductivity of the target flow medium. Specific heat capacity c and thermal conductivity λ can be obtained by consulting relevant manuals or using measuring instruments. For example, assuming the specific heat capacity of water is c1 = 4186 J / (kg / cdotpK), dynamic viscosity μ = 0.001 Pa / cdotps, and thermal conductivity λ = 0.6 W / (m / cdotpK), then substituting these parameters into the second formula to calculate the Prandtl number: Rr = (4182 * 0.001) / 0.6 = 6.977.

[0060] Then, the convective heat transfer coefficient corresponding to the target flow medium is determined based on the Reynolds number. The convective heat transfer coefficient includes the laminar heat transfer coefficient and the turbulent heat transfer coefficient. The size of the Reynolds number can be used to determine whether the flow state is laminar or turbulent. Usually, when the Reynolds number is greater than the preset threshold, the convective heat transfer coefficient is the turbulent heat transfer coefficient. When the Reynolds number is less than or equal to the preset threshold, the convective heat transfer coefficient is the laminar heat transfer coefficient. The preset threshold is a critical value that can be set based on historical conditions. Select the corresponding convective heat transfer coefficient formula according to the flow state. The convective heat transfer coefficient can be calculated using the following formula: ; Where h1 represents the laminar heat transfer coefficient in the convective heat transfer coefficient, h represents the turbulent heat transfer coefficient in the convective heat transfer coefficient, λ represents the thermal conductivity of the target flow medium, d represents the outer diameter of the tube, Re represents the Reynolds number of the target flow medium, and Rr represents the Prandtl number of the target flow medium. For example, if the Reynolds number Re = 100000 and the preset threshold is set to 2300, the Reynolds number is greater than the preset threshold, and the convective heat transfer coefficient is determined to be the turbulent heat transfer coefficient. Using the turbulent heat transfer coefficient to calculate h2 = 0.023 * (0.6 / 0.05) * 100000 0.8 *6.977 0.4 =1200w.

[0061] At high temperatures, phase transformation or other internal structural changes (such as grain reorganization) in the target steel will result in the absorption or release of heat. The change in internal energy is calculated using the following third formula: ΔQ1 = m * ΔH. Here, ΔQ1 represents the change in internal energy of the target steel, m represents the mass of the target steel (which can be measured), and ΔH represents the amount of heat absorbed per unit mass of the target steel during the phase transformation. The amount of heat absorbed or released during the phase transformation can be monitored to determine the heat value. For example, if the target steel has a mass of m = 100 kg and no phase transformation occurs, the phase transformation heat ΔH = 0 J / kg. Using the third formula, the change in internal energy is calculated as ΔQ1 = 1000 * 0 = 0 J.

[0062] When the target cooling medium (such as water or oil) evaporates, it absorbs a large amount of heat. The heat loss value is calculated using the following fourth formula: ΔQ2 = η * M * L. Here, ΔQ2 represents the heat loss value of the target flow medium, η represents the evaporation efficiency of the target flow medium, M represents the evaporation mass of the target flow medium, and L represents the heat absorbed by the target flow medium during the conversion. The evaporation efficiency and evaporation mass of the target flow medium, as well as the heat absorbed by evaporation, are measured. For example, if the target flow medium is water, the evaporation efficiency η of water is 0.8, and the evaporation mass M is 0.2 kg. The heat absorbed by evaporation, L, is 2260 J / kg. The heat loss value calculated using the fourth formula is ΔQ2 = 0.8 * 0.2 * 2260 * 10 3 =361600J.

[0063] During the high-temperature cooling process, radiation heat transfer cannot be ignored. The heat change value is calculated using the following formula: ; Among them, ΔQ3 represents the heat change value of the target steel, represents the Stefan-Boltzmann constant, which is 5.67*10 -8 W / m 2 k 4 ; The emissivity of the target steel surface, A1, the surface area of ​​the target steel, T1, the first temperature of the target steel, T3, the ambient temperature, and t, the cooling time, can be obtained by measuring the surface area A1, the first temperature T1, and the ambient temperature T3 of the target steel. For example, the surface area A1 of the target steel is 1.5m 2 , first temperature T1 = 200 ℃ = 473.15K, ambient temperature T3 = 20 ℃ = 293.15K, cooling time t = 60s, emissivity =0.7, =5.67*10 -8 W / m 2 k 4 , Substitute each parameter into the heat change value calculation formula, ΔQ3=5.67*10 -8 *0.7*1.5*(473.15 4 -293.15 4 )*60=1.21*10 6 J. Obtain the heat exchange area between the target flow medium and the target steel, and obtain the flow rate of the target flow medium, and obtain the average value from the first temperature interval. The heat exchange area can be obtained by actual measurement, and the flow rate v can be measured by a flow meter. To obtain the average value from the first temperature interval, the maximum and minimum values ​​of the first temperature interval can be obtained, and then the average of the maximum and minimum values ​​can be calculated, and the average value can be output as the average value of the first temperature interval. For example, the heat exchange area A2=1.5m 2 , flow velocity v1 = 2 m / s (used for Reynolds number calculation), and the average value of the first temperature interval is T2 = 110°C = 383.15K.

[0064] The initial temperature corresponding to the target flow medium is obtained according to the first temperature. When the target steel is cooled by water cooling in the water-oil alternating cooling, the starting temperature corresponding to the water in the spray system is determined according to the first temperature, that is, the initial temperature. The initial temperature can be set according to the process requirements.

[0065] Finally, the obtained initial temperature, convective heat transfer coefficient, first temperature, average value, heat change value, internal energy change value, and heat loss value are calculated to obtain the first cooling temperature corresponding to the target flow medium. The first cooling temperature can be calculated using the following formula: ; Among them, T mrepresents the first cooling temperature corresponding to the target flow medium, T0 represents the initial temperature corresponding to the target flow medium, T1 represents the first temperature of the target steel, T2 represents the average value corresponding to the first temperature interval, c1 represents the specific heat capacity corresponding to the target flow medium, h represents the convective heat transfer coefficient, when the Reynolds number is greater than the preset threshold, the convective heat transfer coefficient is the turbulent heat transfer coefficient h2, when the Reynolds number is less than or equal to the preset threshold, the convective heat transfer coefficient is the laminar heat transfer coefficient h1, A2 represents the heat transfer area, m represents the mass of the target steel, ΔQ1 represents the internal energy change value, ΔQ2 represents the heat loss value, and ΔQ3 represents the heat change value.

[0066] For example, the parameters obtained in the above steps are substituted into the formula to calculate the first cooling temperature T m , the first temperature of the target steel is T1 = 200℃ = 473.15K, the convection heat transfer coefficient is h = h2 = 1200w, and the heat transfer area is A2 = 1.5m 2 , the average value of the first temperature interval is T2 = 110℃ = 383.15K, the initial temperature is T0 = 20℃ = 293.15K, c1 = 4186J, m = 100kg, ΔQ1 = 0J, ΔQ2 = 361600J, ΔQ3 = 1.21*10 6 J, calculate the first cooling temperature T m =293.15-(1200*1.5(473.15-383.15)) / 4186*100+(1.21*10 6 +0) / 4186*100-(361600 / 4186*100)=293.15-0.387+2.90-0.865=294.80K, and then convert 294.80K to Celsius: Tm=294.80-273.15=21.65℃.

[0067] After determining the first cooling temperature corresponding to the target steel, the control system sends a first temperature adjustment command to the spray system, adjusting the initial temperature of the water in the spray system to the first cooling temperature. Based on this command, the spray system adjusts its operating parameters (such as valve opening and pump flow rate) to adjust the water temperature from the initial temperature to the first cooling temperature and begins cooling the target steel. For example, the control system sends a command to the spray system to set the first cooling temperature to 21.65°C. The spray system adjusts its operating parameters to gradually reduce the water temperature from 25°C to 21.65°C and begins spray cooling the target steel. During the cooling process, the target steel is scanned again using an infrared thermometer to obtain a second temperature. This second temperature refers to the temperature at which the target steel is being spray-cooled.

[0068] In one possible implementation, after determining to perform a cooling operation on the target steel, it is necessary to constantly monitor the current temperature of the target steel. When the cooling rate of the target steel reaches a stable cooling state, it can be assumed that the first cooling temperature cannot meet the cooling demand of the target steel, and the cooling temperature of the target flow medium needs to be recalculated, and then the cooling temperature of the target flow medium is dynamically adjusted to match the cooling demand of the target steel. Specifically, the steps include: obtaining the target temperature of the target steel at multiple time points to obtain a temperature change curve; calculating the temperature difference between the target temperatures corresponding to any two adjacent time points to obtain multiple temperature differences; and determining whether the first temperature difference and the second temperature difference are both less than a preset temperature. threshold, the first temperature difference and the second temperature difference are any two adjacent temperature differences among the multiple temperature difference values; when the first temperature difference and the second temperature difference are both less than the preset temperature threshold, it is determined that the cooling rate of the target steel reaches a stable cooling state; the fourth temperature corresponding to the temperature change curve in the stable cooling state is obtained; according to the first cooling temperature, the fourth temperature, the average value corresponding to the first temperature interval and the convection heat transfer coefficient, the second cooling temperature corresponding to the target flow medium is calculated; according to the second cooling temperature, a second temperature adjustment instruction is generated, and the second temperature adjustment instruction is sent to the spray system, so that the spray system adjusts the first cooling temperature to the second cooling temperature, and controls the cooling of the target steel according to the second cooling temperature.

[0069] Specifically, when the target flow medium is adjusted to a first cooling temperature and the target steel is cooled using the first cooling temperature, a temperature measuring device such as a thermocouple or infrared thermometer is used during the cooling process to measure the temperature of the target steel at multiple preset time points. The temperature value measured at each time point is recorded to form a series of time-temperature data points. A temperature change curve can be drawn based on the recorded time-temperature data points using drawing software or programming tools. For example, at 0 seconds, 10 seconds, 20 seconds, 30 seconds, 40 seconds, and 50 seconds, the temperature of the target steel is 350°C, 310°C, 270°C, 250°C, 220°C, and 210°C, respectively. These data points are recorded and a temperature change curve is drawn. For any two adjacent time points on the temperature change curve, the difference between their corresponding target temperatures is calculated. The temperature difference between each adjacent time point is recorded. For example, calculate the temperature difference between adjacent time points: 350°C - 310°C = 40°C, 310°C - 270°C = 40°C, 270°C - 250°C = 20°C, 250°C - 220°C = 30°C, and 220°C - 210°C = 10°C. Based on process requirements or experience, set a preset temperature threshold, perhaps 10°C. Randomly select two adjacent temperature differences (the first temperature difference and the second temperature difference) from the recorded temperature differences and compare whether they are both below the preset temperature threshold. If two consecutive temperature differences are both below the preset temperature threshold, the target steel is considered to have reached a stable cooling rate. For example, at two consecutive time points, such as 50 and 60 seconds, if the temperature at 60 seconds is 202°C, the difference is 8°C. The first temperature difference is 10°C, and the second temperature difference is 8°C. At this point, both the first and second temperature differences are below the preset temperature threshold, confirming that the target steel has reached a stable cooling rate. Read the temperature value of the target steel corresponding to the stable cooling state from the temperature change curve, that is, the fourth temperature. For example, in the stable cooling state (such as at the 50th and 60th seconds), the temperature of the target steel is 210°C and 202°C. At this time, 202°C can be used as an example as the fourth temperature. Then use the above calculation formula for calculating the first cooling temperature, substitute the first cooling temperature, the fourth temperature, the average value corresponding to the first temperature interval, and the convection heat transfer coefficient into the formula to calculate the second flow temperature corresponding to the target flow medium. For example, the first temperature of the target steel is T1 = 202℃ = 475.15K, the convection heat transfer coefficient is h = h2 = 1200w, and the heat exchange area is A2 = 1.5m 2, the average value of the first temperature interval is T2 = 110℃ = 383.15K, the initial temperature is T0 = 21.65℃ = 294.80K, c1 = 4186J, m = 100kg, and the internal energy change value corresponding to the target steel is ΔQ1 = 5J, the heat loss value is ΔQ2 = 361600J, ΔQ3 = 1.21*10 6 J, at this time calculate the first cooling temperature T m =294.80-(1200*1.5(475.15-383.15)) / 4186*100+(1.21*10 6 +5) / 4186*100-(361600 / 4186*100)=294.80-0.395+14.83-0.863=308.37K, then convert 308.37K to Celsius T m =308.37 - 275.15 = 33.2°C. Based on the calculated second cooling temperature, a second temperature adjustment command is generated and sent to the spray system via a control system (such as a PLC or DCS). Upon receiving the command, the spray system adjusts its operating parameters (such as valve opening and water pump flow) to adjust the first cooling temperature to the second cooling temperature. The spray system then controls the cooling of the target steel based on the adjusted cooling temperature. If either the first temperature difference or the second temperature difference is not less than a preset temperature threshold, the target steel's cooling rate is determined to have not reached a stable state. The target steel's temperature change is continuously monitored until it is confirmed to have reached a stable state. The target steel's corresponding fourth temperature is then re-obtained, and the second cooling temperature is calculated using the aforementioned formula. This second cooling temperature is then sent to the spray system, allowing the spray system to adjust the water temperature from the first to the second.

[0070] S106: Determine whether the second temperature is within the first temperature range.

[0071] In the above S106, after obtaining the second temperature corresponding to the target steel, the second temperature is compared with the first temperature range to determine whether the second temperature is within the first temperature range.

[0072] For example, if the second temperature is 180°C and the first temperature range is 150°C to 250°C, it is determined whether 180°C is between 150°C and 250°C. Since 180°C is within the first temperature range, it is determined that the water cooling of the target steel has reached the temperature requirement for water cooling. That is, the first temperature range can be understood as the temperature range to which the target steel needs to be lowered after water cooling. This determines that the water cooling in the water-oil alternating cooling method is terminated.

[0073] S107: When the second temperature is within the first temperature range, determine and control the oil cooling system to perform a cooling operation on the target steel according to the second temperature range to obtain a third temperature.

[0074] In S107, after confirming that the second temperature is within the first temperature range, the water cooling in the alternating water-oil cooling method is completed, and the spray system is shut down. The oil cooling system is activated, and the target steel is immersed in oil or cooled using an oil spray system. A third cooling temperature is determined based on the second temperature. The third cooling temperature refers to the starting temperature of the oil medium during oil cooling of the target steel. The third cooling temperature can be determined based on actual process requirements. The fourth cooling temperature is calculated using the same method as described above for calculating the first cooling temperature. The fourth cooling temperature is calculated using the formula above, except that the second temperature, the third cooling temperature, the average value of the second temperature range, and the convective heat transfer coefficient of the target steel are obtained. Since the calculation process is similar to the calculation process for the first cooling temperature, only the corresponding values ​​of the various parameters are changed, further details are omitted here. Based on the fourth cooling temperature calculated above, a temperature adjustment command is sent to the oil cooling system, causing the oil cooling system to adjust the oil medium from the third cooling temperature to the fourth cooling temperature, and then continue cooling the target steel at the fourth cooling temperature. During the cooling process, the target steel is scanned again using an infrared thermometer to obtain its third temperature.

[0075] In addition, when the second temperature is not within the first temperature range, the spray system is continued to be used to cool the target steel until the second temperature of the target steel is within the first temperature range, and then the spray system is stopped to cool the target steel.

[0076] For example, the target steel is cooled using an oil spray system for a period of time, and then scanned using an infrared thermometer to obtain a third temperature of 130°C.

[0077] S108: Determine whether the third temperature is within the second temperature range.

[0078] In the above S108, the third temperature is compared with the second temperature range to determine whether the third temperature is within the second temperature range. For example, if the third temperature is 130°C and the second temperature range is 50°C-140°C, then 130°C is within the second temperature range.

[0079] S109: If it is determined that the third temperature is within the second temperature range, it is determined that the target steel has completed the cooling operation.

[0080] In S109, upon confirming that the third temperature is within the second temperature range, the oil cooling in the alternating water-oil cooling method has concluded, and the oil cooling system may be shut down. At this point, the alternating water-oil cooling method for the target steel has concluded, confirming that the target steel has been completely cooled, and the target steel may be removed for subsequent processing. If the third temperature is not within the second temperature range, the oil cooling system continues to cool the target steel until the third temperature of the target steel is within the second temperature range, at which point the oil cooling system is discontinued.

[0081] This embodiment focuses on the need to control the cooling of the target steel after the hot processing stage. During the cooling process, the cooling method is dynamically selected based on the material information and cooling time of the target steel to solve the problem that the traditional cooling method is fixed and cannot adapt to material differences. When selecting a suitable cooling method to cool the target steel, the current required cooling temperature of the target steel can be accurately calculated based on the temperature of the target steel, the initial temperature of the cooling medium, the heat exchange area, the flow rate and the average value. During the cooling process, the temperature of the target steel is monitored in real time at each time point to determine whether the target steel has reached a stable cooling state. After determining that the target steel has reached a stable state, the cooling temperature of the cooling medium is recalculated, allowing the cooling temperature to be dynamically adjusted according to the actual cooling situation of the target steel, ensuring that the cooling process always meets the process requirements.

[0082] The present application also provides a temperature control device for steel processing. Figure 2 This is a schematic diagram of a temperature control device for steel processing provided in an embodiment of the present application. Figure 2 The device includes an acquisition unit 201, a processing unit 202 and a determination unit 203.

[0083] An acquisition unit 201 acquires temperature parameters corresponding to target steel, and determines cooling control of the target steel based on the temperature parameters, where the target steel is steel in a processing stage; acquires material information of the target steel, and determines a first temperature range and a second temperature range based on the material information, where the first temperature range is a cooling temperature range to be reached by water cooling, and the second temperature range is a cooling temperature range to be reached by oil cooling, and the minimum value of the first temperature range is greater than the maximum value of the second temperature range; acquires a first temperature of the target steel, and compares the first temperature with the first temperature range and the second temperature range to obtain a comparison result, where the first temperature is a temperature obtained by scanning the target steel using an infrared thermometer.

[0084] The processing unit 202 determines a cooling method for the target steel based on the comparison result and the cooling time, where the cooling methods include water cooling, oil cooling, and water-oil alternating cooling. If the cooling method of the target steel is determined to be the water-oil alternating cooling method, the processing unit 202 controls the spray system to cool the target steel according to the first temperature range to obtain a second temperature of the target steel. The processing unit 202 determines whether the second temperature is within the first temperature range. When the second temperature is within the first temperature range, the processing unit 202 controls the oil cooling system to cool the target steel according to the second temperature range to obtain a third temperature. The processing unit 202 determines whether the third temperature is within the second temperature range.

[0085] The determining unit 203 determines that the target steel has completed the cooling operation if it is determined that the third temperature is within the second temperature range.

[0086] In one possible embodiment, the processing unit 202 is used to calculate the Reynolds number corresponding to the target flow medium according to the first formula, where the target flow medium includes a water medium or an oil medium; calculate the Prandtl number corresponding to the target flow medium according to the second formula; calculate the internal energy change value corresponding to the internal structure of the target steel according to the third formula; calculate the heat loss value caused by evaporation of the target flow medium according to the fourth formula; obtain the surface area and ambient temperature of the target steel, and calculate the heat change value corresponding to the target steel based on the surface area, the first temperature and the ambient temperature; determine the convective heat transfer coefficient corresponding to the target flow medium according to the Reynolds number, where the convective heat transfer coefficient includes the laminar heat transfer coefficient and the turbulent heat transfer coefficient. ; The acquisition unit 201 is used to obtain the heat exchange area between the target flow medium and the target steel, and obtain the flow rate corresponding to the target flow medium, and obtain the average value from the first temperature interval; obtain the initial temperature corresponding to the target flow medium according to the first temperature; the processing unit is used to calculate the first cooling temperature corresponding to the target flow medium according to the initial temperature, the convection heat transfer coefficient, the first temperature, the average value, the heat change value, the internal energy change value and the heat loss value; send a first temperature adjustment instruction to the spray system to control the spray system to adjust the initial temperature to the first cooling temperature, and cool the target steel according to the first cooling temperature, where the initial temperature is the starting temperature corresponding to the water in the spray system. In one possible embodiment, the Reynolds number is calculated by the following first formula: ; Wherein, Re represents the Reynolds number of the target flow medium, p represents the density of the target flow medium, v1 represents the flow velocity of the target flow medium, d represents the pipe diameter, and μ represents the dynamic viscosity of the target flow medium; The Prandtl number is calculated by the following second formula: ; Wherein, Pr represents the Prandtl number of the target flow medium, c1 represents the specific heat capacity of the target flow medium, μ represents the dynamic viscosity of the target flow medium, and λ represents the thermal conductivity of the target flow medium; The internal energy change value is calculated by the following third formula: ΔQ1=m*ΔH; wherein ΔQ1 represents the internal energy change value of the target steel, m represents the mass of the target steel, and ΔH represents the heat value absorbed by a unit mass of the target steel during phase change; The heat loss value is calculated using the following fourth formula: ΔQ2=η*M*L; where ΔQ2 represents the heat loss value of the target flow medium, η represents the evaporation efficiency of the target flow medium, M represents the evaporation mass of the target flow medium, and L represents the heat absorbed by the target flow medium during the conversion. The heat change value is calculated using the following formula: ; Among them, ΔQ3 represents the heat change value of the target steel, represents the Stefan-Boltzmann constant, represents the emissivity of the target steel surface, A1 represents the surface area of ​​the target steel, T1 represents the first temperature of the target steel, T3 represents the ambient temperature, and t represents the cooling time; The convective heat transfer coefficient is calculated by the following formula: ; ; Wherein, h1 represents the laminar heat transfer coefficient in the convective heat transfer coefficient, h represents the turbulent heat transfer coefficient in the convective heat transfer coefficient, λ represents the thermal conductivity of the target flow medium, d represents the outer diameter of the tube, Re represents the Reynolds number of the target flow medium, and Rr represents the Prandtl number of the target flow medium; The first cooling temperature is calculated by the following formula: ; Among them, T mrepresents the first cooling temperature corresponding to the target flow medium, T0 represents the initial temperature corresponding to the target flow medium, T1 represents the first temperature of the target steel, T2 represents the average value corresponding to the first temperature interval, c1 represents the specific heat capacity corresponding to the target flow medium, h represents the convective heat transfer coefficient, when the Reynolds number is greater than the preset threshold, the convective heat transfer coefficient is the turbulent heat transfer coefficient h2, when the Reynolds number is less than or equal to the preset threshold, the convective heat transfer coefficient is the laminar heat transfer coefficient h1, A2 represents the heat transfer area, m represents the mass of the target steel, ΔQ1 represents the internal energy change value, ΔQ2 represents the heat loss value, and ΔQ3 represents the heat change value. In a possible embodiment, the acquisition unit 201 is used to obtain the target temperature of the target steel at multiple time points to obtain a temperature change curve; the processing unit 202 is used to calculate the temperature difference between the target temperatures corresponding to any two adjacent time points to obtain multiple temperature differences; judge Whether the first temperature difference and the second temperature difference are both less than a preset temperature threshold, the first temperature difference and the second temperature difference are any two adjacent temperature differences among a plurality of temperature differences; the determination unit 203 is used to determine that the cooling rate of the target steel reaches a stable cooling state when the first temperature difference and the second temperature difference are both less than the preset temperature threshold; the acquisition unit 201 is used to obtain a fourth temperature corresponding to the temperature change curve in the stable cooling state; the processing unit 202 is used to calculate the second cooling temperature corresponding to the target flow medium according to the first cooling temperature, the fourth temperature, the average value corresponding to the first temperature interval, the convective heat transfer coefficient, the heat change value, the internal energy change value and the heat loss value, generate a second temperature adjustment instruction according to the second cooling temperature, and send the second temperature adjustment instruction to the spray system so that the spray system adjusts the first cooling temperature to the second cooling temperature, and controls the cooling of the target steel according to the second cooling temperature.

[0087] In one possible embodiment, the acquisition unit 201 is used to obtain the volume corresponding to the target steel and the ambient temperature; the processing unit is used to calculate the cooling efficiency corresponding to the target steel according to the cooling time, volume, ambient temperature and first temperature at 201; determine whether the cooling efficiency is in a preset first efficiency range, the preset first efficiency range being the cooling efficiency range achievable by the water cooling method; the determination unit is used to determine 203 that the cooling method of the target steel is water cooling when the cooling efficiency is in the preset first efficiency range; when the cooling efficiency is not in the preset first efficiency range, determine whether the cooling efficiency is in a preset second efficiency range, the preset second efficiency range being the cooling efficiency range achievable by the water-oil alternating cooling method; when the cooling efficiency is in the preset second efficiency range, determine that the cooling method of the target steel is water-oil alternating cooling; when the cooling efficiency is not in the preset second efficiency range, determine whether the cooling efficiency is in a preset third efficiency range, the preset third efficiency range being the cooling efficiency range achievable by the oil cooling method; when the cooling efficiency is in the preset third efficiency range, determine that the cooling method of the target steel is oil cooling.

[0088] In one possible implementation, the cooling efficiency is calculated using the following formula: ; Wherein, E represents cooling efficiency, A2 represents heat exchange area, V represents volume of target steel, T1 represents first temperature, T3 represents ambient temperature, t represents cooling time, P represents density of target steel, a represents constant of ambient fluid, v2 represents ambient fluid velocity, c2 represents specific heat capacity of target steel, h3 represents natural convection heat transfer coefficient, f(A2,V,K) represents shape correction coefficient of target steel, and K represents irregularity of shape of target steel.

[0089] In one possible embodiment, the acquisition unit 201 is used to obtain a first threshold value from the first temperature interval when the first temperature is not in the first temperature interval and the first temperature is not in the second temperature interval, and the first threshold value is the maximum value in the first temperature interval; the processing unit 202 is used to determine whether the first temperature is greater than the first threshold value; when the first temperature is greater than the first threshold value, determine whether the cooling time is equal to the preset time length; the determination unit 203 is used to determine that the cooling method of the target steel is a water-oil alternating cooling method when the cooling time is equal to the preset time length.

[0090] It should be noted that the above embodiments provide devices that implement their functions using only the division of the above functional modules as examples. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the device and method embodiments provided in the above embodiments are based on the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0091] This application also discloses an electronic device. Figure 3 , Figure 3 The electronic device 300 may include: at least one processor 301 , at least one network interface 304 , a user interface 303 , a memory 302 , and at least one communication bus 305 .

[0092] The communication bus 305 is used to realize the connection and communication between these components.

[0093] The user interface 303 may include a display screen (Display) and a camera (Camera). Optionally, the user interface 303 may also include a standard wired interface and a wireless interface.

[0094] The network interface 304 may optionally include a standard wired interface or a wireless interface (such as a WI-FI interface).

[0095] The processor 301 may include one or more processing cores. Using various interfaces and circuits, the processor 301 connects to various components within the server. It executes instructions, programs, code sets, or instruction sets stored in the memory 302, as well as accesses data stored in the memory 302, to perform various server functions and process data. Optionally, the processor 301 may be implemented using at least one of the following hardware forms: a digital signal processing (DSP), a field-programmable gate array (FPGA), or a programmable logic array (PLA). The processor 301 may integrate one or a combination of a central processing unit (CPU), a graphics processing unit (GPU), and a modem. The CPU primarily processes the operating system, user interface, and application requests; the GPU is responsible for rendering and drawing content displayed on the display screen; and the modem handles wireless communications. It is understood that the modem may also be implemented independently of the processor 301 and implemented as a separate chip.

[0096] Memory 302 may include random access memory (RAM) or read-only memory (ROM). Optionally, memory 302 may include non-transitory computer-readable storage medium. Memory 302 may be used to store instructions, programs, codes, code sets, or instruction sets. Memory 302 may include a program storage area and a data storage area. The program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the aforementioned method embodiments, and the data storage area may store data involved in the aforementioned method embodiments. Memory 302 may also optionally be at least one storage device located remotely from the aforementioned processor 301.

[0097] like Figure 3 As shown, the memory 302 as a computer storage medium may include an operating system, a network communication module, a user interface module, and an application program for temperature control of steel processing.

[0098] exist Figure 3 In the electronic device 300 shown, the user interface 303 is mainly used to provide an input interface for the user and obtain data input by the user; and the processor 301 can be used to call the application for temperature control of steel processing stored in the memory 302. When executed by one or more processors, the electronic device executes one or more methods described in the above embodiments.

[0099] It should be noted that for the aforementioned method embodiments, for simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required for this application.

[0100] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0101] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods, 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 through some service interfaces, and the indirect coupling or communication connection of the devices or units can be electrical or other forms.

[0102] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0103] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0104] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of this application, or the portion that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory and includes several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of this application. The aforementioned memory includes various media that can store program code, such as USB flash drives, mobile hard drives, magnetic disks, or optical disks.

[0105] The above is only an exemplary embodiment of the present disclosure and cannot be used to limit the scope of the present disclosure. That is, any equivalent changes and modifications made according to the teachings of the present disclosure are still within the scope of the present disclosure. After considering the disclosure of the specification and the truth of practice, those skilled in the art will easily think of other embodiments of the present disclosure. This application is intended to cover any variation, use or adaptive change of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the technical field not recorded in the present disclosure.

Claims

1. A temperature control method for steel processing, characterized in that: The method comprises: Acquiring temperature parameters corresponding to target steel, and determining cooling control of the target steel based on the temperature parameters, wherein the target steel is steel in a processing stage; Obtaining material information of the target steel, and determining a first temperature range and a second temperature range based on the material information, wherein the first temperature range is a cooling temperature range to be reached by water cooling, the second temperature range is a cooling temperature range to be reached by oil cooling, and a minimum value of the first temperature range is greater than a maximum value of the second temperature range; Obtaining a first temperature of the target steel, and comparing the first temperature with the first temperature interval and the second temperature interval to obtain a comparison result, wherein the first temperature is a temperature obtained by scanning the target steel using an infrared thermometer; Determining a cooling method for the target steel according to the comparison result and the cooling time, wherein the cooling method includes a water cooling method, an oil cooling method, and a water-oil alternating cooling method; If it is determined that the cooling method of the target steel is the water-oil alternating cooling method, controlling the spray system to perform a cooling operation on the target steel according to the first temperature range to obtain a second temperature of the target steel; determining whether the second temperature is within the first temperature range; When the second temperature is within the first temperature range, determining to control the oil cooling system to perform a cooling operation on the target steel according to the second temperature range to obtain a third temperature; determining whether the third temperature is within the second temperature range; If it is determined that the third temperature is within the second temperature range, it is determined that the target steel has completed the cooling operation.

2. The method according to claim 1, characterized in that The controlling the spray system to cool the target steel according to the first temperature range specifically includes: Calculating the Reynolds number corresponding to the target flow medium according to the first formula, wherein the target flow medium includes a water medium or an oil medium; Calculating the Prandtl number corresponding to the target flow medium according to the second formula; Calculating the internal energy change value corresponding to the target steel internal structure according to the third formula; Calculating the heat loss value caused by evaporation of the target flow medium according to the fourth formula; Obtaining the surface area and ambient temperature of the target steel, and calculating a heat change value corresponding to the target steel based on the surface area, the first temperature, and the ambient temperature; determining a convective heat transfer coefficient corresponding to the target flow medium according to the Reynolds number, wherein the convective heat transfer coefficient includes a laminar heat transfer coefficient and a turbulent heat transfer coefficient; Obtaining a heat exchange area between the target flow medium and the target steel, and obtaining a flow velocity corresponding to the target flow medium, and obtaining an average value from the first temperature range; Obtaining an initial temperature corresponding to the target flow medium according to the first temperature; calculating a first cooling temperature corresponding to the target flow medium according to the initial temperature, the convective heat transfer coefficient, the first temperature, the average value, the heat change value, the internal energy change value, and the heat loss value; A first temperature adjustment instruction is sent to the spray system to control the spray system to adjust the initial temperature to the first cooling temperature and to cool the target steel according to the first cooling temperature, wherein the initial temperature is a starting temperature corresponding to water in the spray system.

3. The method according to claim 2, characterized in that The Reynolds number is calculated by the following first formula: ; Where Re represents the Reynolds number of the target flow medium, p represents the density of the target flow medium, v1 represents the flow velocity of the target flow medium, d represents the pipe diameter, and μ represents the dynamic viscosity of the target flow medium; The Prandtl number is calculated by the following second formula: ; Wherein, Pr represents the Prandtl number of the target flow medium, c1 represents the specific heat capacity of the target flow medium, μ represents the dynamic viscosity of the target flow medium, and λ represents the thermal conductivity of the target flow medium; The internal energy change value is calculated using the following third formula: ΔQ1=m*ΔH; wherein ΔQ1 represents the internal energy change value of the target steel, m represents the mass of the target steel, and ΔH represents the heat value absorbed by a unit mass of the target steel during phase change; The heat loss value is calculated using the following fourth formula: ΔQ2=η*M*L; wherein ΔQ2 represents the heat loss value of the target flow medium, η represents the evaporation efficiency of the target flow medium, M represents the evaporation mass of the target flow medium, and L represents the heat absorbed by the target flow medium during conversion. The heat change value is calculated using the following formula: ; Wherein, ΔQ3 represents the heat change value of the target steel, represents the Stefan-Boltzmann constant, represents the emissivity of the target steel surface, A1 represents the surface area of ​​the target steel, T1 represents the first temperature of the target steel, T3 represents the ambient temperature, and t represents the cooling time; The convective heat transfer coefficient is calculated by the following formula: ; ; Wherein, h1 represents the laminar heat transfer coefficient in the convective heat transfer coefficient, h represents the turbulent heat transfer coefficient in the convective heat transfer coefficient, λ represents the thermal conductivity of the target flow medium, d represents the outer diameter of the tube, Re represents the Reynolds number of the target flow medium, and Rr represents the Prandtl number of the target flow medium; The first cooling temperature is calculated by the following formula: ; Among them, T m represents the first cooling temperature corresponding to the target flow medium, T0 represents the initial temperature corresponding to the target flow medium, T1 represents the first temperature of the target steel, T2 represents the average value corresponding to the first temperature range, c1 represents the specific heat capacity corresponding to the target flow medium, h represents the convection heat transfer coefficient, when the Reynolds number is greater than the preset threshold, the convection heat transfer coefficient is the turbulent heat transfer coefficient h2, when the Reynolds number is less than or equal to the preset threshold, the convection heat transfer coefficient is the laminar heat transfer coefficient h1, A2 represents the heat exchange area, m represents the mass of the target steel, ΔQ1 represents the internal energy change value, ΔQ2 represents the heat loss value, and ΔQ3 represents the heat change value.

4. The method according to claim 2, characterized in that After sending a first temperature adjustment instruction to the spray system to control the spray system to adjust the initial temperature to the first cooling temperature and performing a cooling operation on the target steel according to the first cooling temperature, the method further includes: Obtaining target temperatures of the target steel at multiple time points to obtain a temperature change curve; Calculating the temperature difference between the target temperatures corresponding to any two adjacent time points to obtain multiple temperature difference values; Determining whether a first temperature difference and a second temperature difference are both less than a preset temperature threshold, the first temperature difference and the second temperature difference being any two adjacent temperature differences among a plurality of the temperature differences; When the first temperature difference and the second temperature difference are both less than the preset temperature threshold, determining that the cooling rate of the target steel reaches a stable cooling state; Acquire a fourth temperature corresponding to the temperature change curve in the stable cooling state; Calculating a second cooling temperature corresponding to the target flow medium according to the first cooling temperature, the fourth temperature, the average value corresponding to the first temperature range, the convective heat transfer coefficient, the heat change value, the internal energy change value, and the heat loss value; A second temperature adjustment instruction is generated according to the second cooling temperature, and the second temperature adjustment instruction is sent to the spray system so that the spray system adjusts the first cooling temperature to the second cooling temperature, and controls the cooling of the target steel according to the second cooling temperature.

5. The method according to claim 3, characterized in that Determining a cooling method for the target steel based on the comparison result and the cooling time specifically includes: Obtaining the volume corresponding to the target steel and obtaining the ambient temperature; Calculating a cooling efficiency corresponding to the target steel according to the cooling time, the volume, the ambient temperature, and the first temperature; Determining whether the cooling efficiency is within a preset first efficiency range, where the preset first efficiency range is a cooling efficiency range achievable by the water cooling method; When the cooling efficiency is within the preset first efficiency range, determining that the cooling method of the target steel is the water cooling method; When the cooling efficiency is not within the preset first efficiency range, determining whether the cooling efficiency is within a preset second efficiency range, the preset second efficiency range being a cooling efficiency range achievable by the water-oil alternating cooling method; When the cooling efficiency is within the preset second efficiency range, determining that the cooling method of the target steel is the water-oil alternating cooling method; When the cooling efficiency is not within the preset second efficiency range, determining whether the cooling efficiency is within a preset third efficiency range, the preset third efficiency range being a cooling efficiency range achievable by the oil cooling method; When the cooling efficiency is within the preset third efficiency range, the cooling method of the target steel is determined to be the oil cooling method.

6. The method according to claim 5, characterized in that The cooling efficiency is calculated by the following formula: ; Wherein, E represents the cooling efficiency, A2 represents the heat exchange area, V represents the volume of the target steel, T1 represents the first temperature, T3 represents the ambient temperature, t represents the cooling time, P represents the density of the target steel, a represents the constant of the ambient fluid, v2 represents the ambient fluid velocity, c2 represents the specific heat capacity of the target steel, h3 represents the natural convection heat transfer coefficient, f(A2, V, K) represents the shape correction coefficient of the target steel, and K represents the degree of irregularity of the shape of the target steel.

7. The method according to claim 1, characterized in that Determining a cooling method for the target steel based on the comparison result and the cooling time specifically includes: When the first temperature is not within the first temperature interval and the first temperature is not within the second temperature interval, obtaining a first threshold value from the first temperature interval, where the first threshold value is a maximum value in the first temperature interval; determining whether the first temperature is greater than the first threshold; When the first temperature is greater than the first threshold, determining whether the cooling time is equal to a preset time; When the cooling time is greater than or equal to the preset time, the cooling method of the target steel is determined to be the water-oil alternating cooling method.

8. A temperature control device for steel processing, characterized in that: The device comprises an acquisition unit (201), a processing unit (202) and a determination unit (203); The acquisition unit (201) acquires temperature parameters corresponding to target steel, and determines cooling control of the target steel according to the temperature parameters, wherein the target steel is steel in a processing stage; Obtaining material information of the target steel, determining a first temperature interval and a second temperature interval based on the material information, wherein the first temperature interval is a cooling temperature interval to be reached by water cooling, the second temperature interval is a cooling temperature interval to be reached by oil cooling, and a minimum value of the first temperature interval is greater than a maximum value of the second temperature interval; obtaining a first temperature of the target steel, comparing the first temperature with the first temperature interval and the second temperature interval to obtain a comparison result, wherein the first temperature is a temperature obtained by scanning the target steel using an infrared thermometer; The processing unit (202) determines a cooling method for the target steel according to the comparison result and the cooling time, wherein the cooling method includes a water cooling method, an oil cooling method, and a water-oil alternating cooling method; if the cooling method of the target steel is determined to be the water-oil alternating cooling method, the spray system is controlled to perform a cooling operation on the target steel according to the first temperature range to obtain a second temperature of the target steel; and it is determined whether the second temperature is within the first temperature range; when the second temperature is within the first temperature range, the oil cooling system is controlled to perform a cooling operation on the target steel according to the second temperature range to obtain a third temperature; and it is determined whether the third temperature is within the second temperature range; The determining unit (203) determines that the target steel has completed the cooling operation if it is determined that the third temperature is within the second temperature range.

9. An electronic device, characterized in that: The electronic device (300) comprises a processor (301), a memory (302), a user interface (303) and a network interface (304), wherein the memory (302) is used to store instructions, the user interface (303) and the network interface (304) are used to communicate with other devices, and the processor (301) is used to execute the instructions stored in the memory (302) so that the electronic device (300) executes the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores instructions, and when the instructions are executed, the method according to any one of claims 1 to 7 is executed.

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