Method and device for predicting power consumption per ton of steel

Abstract

The invention discloses a method and device for predicting power consumption per ton of steel, and relates to the technical field of metallurgy. According to the basic parameters, calculating the total power required to be output by a rolling mill motor to drive a roller in each pass; determining the power consumption of each pass according to the total power required to be output by a rolling mill motor transmission roller corresponding to all speed stages included in the rolling process of each pass; and determining the power consumption per ton of steel of the target plate according to the power consumption of each pass. Therefore, the power consumption per ton of steel determined by the method considers all stages of rolling, so that the accuracy of predicting the power consumption per ton of steel is improved. And the method does not depend on data in the existing rolling process, and the application range is wide.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgy, and in particular to a method and device for predicting electricity consumption per ton of steel. Background Art

[0002] The power consumption per ton of steel is the amount of electricity consumed to produce one ton of steel. A rolling mill is a device that realizes the metal rolling process, and generally refers to the equipment that completes the entire process of rolling production. However, there are many types of steel at present, and the incoming material specifications are different from the target specifications. In addition, due to the frequent start and stop of the rolling mill, the rolling process is also accompanied by the acceleration and deceleration process of the rolling mill, which makes the power during rolling not constant. The above situation increases the difficulty of predicting and calculating the power consumption per ton of steel.

[0003] The current research method for predicting the power consumption of rolling mills in the industry mainly uses existing production data to generate training samples, and predicts similar processes in the future through big data models such as linear regression, SVR, neural network regression, random forest regression model and Xgboost regression model. However, the above methods rely on existing data. The more training samples there are, the more accurate the prediction results. However, when developing new products and selecting rolling mills for new production lines, the power consumption data cannot be predicted due to the lack of training samples, and effective guidance cannot be provided for motor selection. Therefore, the existing power consumption prediction methods for tons of steel have low prediction accuracy when there is a lack of rich data, and are only applied to rolling mills with application data, limiting their scope of application. Summary of the invention

[0004] The embodiment of the present invention provides a method and device for predicting power consumption per ton of steel, and the power consumption per ton of steel determined takes into account all stages of rolling, thereby improving the accuracy of power consumption prediction per ton of steel. In addition, the present invention does not rely on data from existing rolling processes and has a wide range of applications.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] In a first aspect, the present invention provides a method for predicting power consumption per ton of steel, comprising: obtaining basic parameters, the basic parameters including a first process parameter of a rolling mill for rolling a target plate, a second process parameter of the target plate, a third process parameter representing a rolling target, and a fourth process parameter that changes with the third process parameter, the first process parameter and the second process parameter being factory setting parameters, and the third process parameter being a rolling target parameter input by a user; calculating the total power required to be output by a rolling mill motor-driven roller in each pass according to the basic parameters; determining the power consumption of each pass according to the total power required to be output by a rolling mill motor-driven roller corresponding to all speed stages included in each rolling process; and determining the power consumption per ton of steel of the target plate according to the power consumption of each pass.

[0007] Optionally, calculating the total power required to be output by the motor-driven rollers in each pass based on the basic parameters includes: calculating the rolling force of each pass in the rolling process based on the basic parameters; calculating the total rolling torque of each pass based on the rolling force of each pass and the basic parameters; calculating the total power required to be output by the motor-driven rollers in each pass based on the basic parameters and the total rolling torque of each pass.

[0008] Optionally, the calculation formula for calculating the rolling force of each pass in the rolling process according to the basic parameters includes:

[0009] P=1.15nσ s F

[0010] Where P represents the rolling force of any pass, n represents the proportionality coefficient, σ s represents the deformation resistance of the target plate, and F represents the area of ​​the target plate.

[0011] Optionally, the calculation formula for calculating the rolling force of each pass in the rolling process according to the basic parameters also includes:

[0012]

[0013]

[0014]

[0015]

[0016] F=Bl

[0017]

[0018] B=(B1+B2) / 2

[0019] Where D1 represents the working roll diameter, H represents the target plate thickness before rolling, σ0 represents the initial deformation resistance of the target plate at the factory set temperature, set deformation amount and set strain rate, T represents the rolling temperature, h represents the target plate thickness after rolling, v represents the rolling speed, B1 represents the target plate width before rolling, and B2 represents the target plate width after rolling.

[0020] Optionally, the calculation formula for calculating the total rolling torque of each pass according to the rolling force of each pass and the basic parameters includes:

[0021]

[0022] Where M 总 Represents the total rolling torque of each pass, M Z Indicates the torque required to complete rolling reduction, M mIt represents the additional friction torque required to overcome the bearing friction, M d Indicates the torque required for roller acceleration and deceleration, M K represents the idling torque, and i represents the transmission ratio of the reducer.

[0023] Optionally, the calculation formula for calculating the total rolling torque of each pass according to the rolling force of each pass and the basic parameters also includes:

[0024] M Z =Plb

[0025] P=1.15nσ s F

[0026]

[0027] M m =M R +M m1

[0028]

[0029]

[0030]

[0031]

[0032]

[0033]

[0034]

[0035]

[0036] GD 2 =mD 2

[0037] M K =0.06M 总

[0038] Where b represents the force arm coefficient of the rolling deformation zone, M R Denotes the friction torque of the backup roller bearing, M m1 represents the friction torque generated by the friction force in the working roll bearing, c represents the force arm of the support roll against the working roll, c frepresents the rolling friction arm between the working roll and the support roll, γ represents the angle between the centerline of the roll and the reaction force of the support roll on the working roll, θ represents the angle between the centerline of the working roll and the support roll and the vertical line, r1 represents the radius of the friction circle of the working roll bearing, r2 represents the radius of the friction circle of the support roll bearing, D2 represents the diameter of the support roll, e represents the offset of the axis of the working roll relative to the axis of the support roll, μ1 represents the friction coefficient of the rolling bearing, μ2 represents the friction coefficient of the liquid friction bearing, a j represents the angular acceleration, They respectively represent the flywheel torque of the main motor rotor of the rolling mill, the flywheel torque of the intermediate shaft, the flywheel torque of the working roll, the flywheel torque of the support roll, the flywheel torque of the rolled piece, and the flywheel torque of the universal joint. m represents the rotor mass, and D represents the rotor diameter.

[0039] Optionally, the calculation formula for calculating the total power required to be output by the motor-driven rollers in each pass according to the basic parameters and the total rolling torque of each pass includes:

[0040]

[0041] Where n 电 is the rolling mill motor speed.

[0042] Optionally, determining the power consumption of each pass based on the total power required to be output by the motor-driven rollers corresponding to all speed stages included in the rolling process of each pass includes: calculating the maximum rolling speed of each pass; determining the speed system of each pass based on the maximum rolling speed of each pass; determining all speed stages included in the rolling process of each pass based on the speed system; determining the power consumption of each pass based on the total power required to be output by the rolling mill motor-driven rollers corresponding to all speed stages included in the rolling process of each pass.

[0043] Optionally, the calculation formula for calculating the maximum rolling speed of each pass includes:

[0044]

[0045] Where V P_max Indicates the maximum rolling speed of each pass, a r represents the roller acceleration, L p Indicates the target board length, v in Indicates the bite speed.

[0046] Optionally, the speed system includes a trapezoidal speed system and a triangular speed system, and the speed system of each pass is determined according to the maximum rolling speed of each pass, including: judging whether the maximum rolling speed of the target pass in each pass exceeds the rolling speed corresponding to the maximum speed of the rolling mill motor of the basic parameter; if so, determining that the speed system of the target pass is a trapezoidal speed system; if not, determining that the speed system of the target pass is a triangular speed system.

[0047] Optionally, if the speed system of the current pass is a trapezoidal speed system, the calculation formula for determining the power consumption of each pass according to the total power required to be output by the rolling mill motor driving the rollers corresponding to all speed stages included in each pass during the rolling process includes:

[0048]

[0049] In the formula, Q i It represents the total rolling torque of each pass, t1 represents the time for the rolled piece to accelerate from rest to the biting speed, N k1 (t) represents the function of rolling no-load power corresponding to time t from static acceleration to biting speed, t2 represents the time when the rolled piece is accelerated to the maximum rolling speed, N a1 (t) represents the function of rolling acceleration power corresponding to time t, t3 represents the uniform rolling time of the rolled piece, N z (t) represents the function of the maximum rolling power corresponding to time t, t4 represents the time for the rolled piece to decelerate to the steel throwing speed, N a2 (t) represents the function of rolling deceleration power corresponding to time t, t5 represents the time from rolling stock throwing steel to stationary, N k2 (t) represents the function of the rolling no-load power from the time when the rolled piece is thrown to a standstill corresponding to the time t.

[0050] Optionally, if the speed system of the current pass is a triangular speed system, the calculation formula for determining the power consumption of each pass according to the total power required to be output by the rolling mill motor driving the roller corresponding to all speed stages included in each pass during the rolling process includes:

[0051]

[0052] Optionally, determining the power consumption per ton of steel of the target plate according to the power consumption of each pass includes: summing the power consumption of each pass to obtain the power consumed in rolling the target plate; calculating the ratio of the power consumed in rolling the target plate to the mass of the target plate to obtain the power consumption per ton of steel of the target plate.

[0053] Optionally, obtaining the basic parameters of the target plate includes: displaying part or all of the basic parameters and the predicted results of electricity consumption per ton of steel of the target plate on an interface; in response to triggering an export button, exporting the basic parameters and the predicted results of electricity consumption per ton of steel of the target plate displayed on the display interface in a preset manner.

[0054] Optionally, the first process parameters include the rough rolling start temperature, the finishing rolling start temperature, the working roll diameter, the bite speed, the rolling acceleration, the force arm of the support roll reaction force on the working roll, the rolling friction force arm between the working roll and the support roll, the support roll diameter, the rolling bearing friction coefficient, the liquid friction bearing friction coefficient, the offset of the working roll axis relative to the support roll axis, the rotor mass of the main motor, the rotor mass of the intermediate shaft, the rotor mass of the working roll, the rotor mass of the support roll, the rotor mass of the rolled piece, the rotor mass of the universal joint, the rotor diameter of the main motor, the rotor mass of the intermediate shaft, the rotor diameter of the working roll, the rotor diameter of the support roll, the rolling The rotor diameter of the component, the rotor diameter of the universal joint, the overload coefficient of the rolling mill motor, the rated power of a single motor of the rolling mill, the speed of the rolling mill motor, the rolling speed corresponding to the maximum speed of the motor, the factory set temperature, the set deformation amount and the set strain rate; the second process parameters include the plate thickness, the plate width, the plate length and the initial deformation resistance of the plate, and the initial deformation resistance of the plate is the deformation resistance of the plate and strip under a specific rolling temperature, a specific engineering strain amount and a specific strain rate; the third process parameters include the target plate thickness, the target plate width, the middle plate thickness and the target plate length, and the fourth process parameters include the rolling deformation zone force arm coefficient.

[0055] In a second aspect, the present invention provides a device for predicting power consumption per ton of steel, comprising: a parameter acquisition unit, suitable for acquiring basic parameters, the basic parameters including a first process parameter of a rolling mill for rolling a target plate, a second process parameter of the target plate, a third process parameter representing a rolling target, and a fourth process parameter that changes with the third process parameter, the first process parameter and the second process parameter being factory setting parameters, and the third process parameter being a rolling target parameter input by a user; a required total output power calculation unit, suitable for calculating the total power required to be output by the rolling mill motor-driven rollers in each pass according to the basic parameters; a power consumption determination unit for each pass, suitable for determining the power consumption for each pass according to the total power required to be output by the rolling mill motor-driven rollers corresponding to all speed stages included in each rolling process; a power consumption determination unit for a ton of steel, suitable for determining the power consumption for a ton of steel of the target plate according to the power consumption for each pass.

[0056] Optionally, the required total output power calculation unit includes: a rolling force calculation unit, suitable for calculating the rolling force of each pass in the rolling process according to the basic parameters; a total rolling torque calculation unit, suitable for calculating the total rolling torque of each pass according to the rolling force of each pass and the basic parameters; a required total output power sub-calculation unit, suitable for calculating the total power required to be output by the motor-driven rolling roller in each pass according to the basic parameters and the total rolling torque of each pass.

[0057] Optionally, the rolling force calculation unit calculates the rolling force of each pass in the rolling process using a calculation formula including:

[0058] P=1.15nσ s F

[0059] Where P represents the rolling force of any pass, n represents the proportionality coefficient, σ s represents the deformation resistance of the target plate, and F represents the area of ​​the target plate.

[0060] Optionally, the rolling force calculation unit may calculate the rolling force of each pass in the rolling process using a calculation formula that further includes:

[0061]

[0062]

[0063]

[0064]

[0065] F=Bl

[0066]

[0067] B=(B1+B2) / 2

[0068] Where D1 represents the working roll diameter, H represents the target plate thickness before rolling, σ0 represents the initial deformation resistance of the target plate at the factory set temperature, set deformation amount and set strain rate, T represents the rolling temperature, h represents the target plate thickness after rolling, v represents the rolling speed, B1 represents the target plate width before rolling, and B2 represents the target plate width after rolling.

[0069] Optionally, the total rolling torque calculation unit calculates the total rolling torque of each pass using a calculation formula including:

[0070]

[0071] Where M 总 Represents the total rolling torque of each pass, M Z Indicates the torque required to complete rolling reduction, M m It represents the additional friction torque required to overcome the bearing friction, M d Indicates the torque required for roller acceleration and deceleration, M K represents the idling torque, and i represents the transmission ratio of the reducer.

[0072] Optionally, the calculation formula for calculating the total rolling torque of each pass by the total rolling torque calculation unit also includes:

[0073] M Z =Plb

[0074] P=1.15nσ s F

[0075]

[0076] M m =M R +M m1

[0077]

[0078]

[0079]

[0080]

[0081]

[0082]

[0083]

[0084]

[0085] GD 2 =mD 2

[0086] M K =0.06M 总

[0087] Where b represents the force arm coefficient of the rolling deformation zone, M R Denotes the friction torque of the backup roller bearing, M m1 represents the friction torque generated by the friction force in the working roll bearing, c represents the force arm of the support roll against the working roll, c f represents the rolling friction arm between the working roll and the support roll, γ represents the angle between the centerline of the roll and the reaction force of the support roll on the working roll, θ represents the angle between the centerline of the working roll and the support roll and the vertical line, r1 represents the radius of the friction circle of the working roll bearing, r2 represents the radius of the friction circle of the support roll bearing, D2 represents the diameter of the support roll, e represents the offset of the axis of the working roll relative to the axis of the support roll, μ1 represents the friction coefficient of the rolling bearing, μ2 represents the friction coefficient of the liquid friction bearing, a j represents the angular acceleration, They respectively represent the flywheel torque of the main motor rotor of the rolling mill, the flywheel torque of the intermediate shaft, the flywheel torque of the working roll, the flywheel torque of the support roll, the flywheel torque of the rolled piece, and the flywheel torque of the universal joint. m represents the rotor mass, and D represents the rotor diameter.

[0088] Optionally, the calculation formula for calculating the total power required to be output by the motor-driven rollers in each pass according to the basic parameters and the total rolling torque of each pass includes:

[0089]

[0090] Where n 电 It is the speed of rolling mill motor, in r / min.

[0091] Optionally, the power consumption determination unit for each pass includes: a maximum rolling speed calculation unit, suitable for calculating the maximum rolling speed of each pass; a speed system determination unit, suitable for determining the speed system of each pass according to the maximum rolling speed of each pass; an all speed stage determination unit, suitable for determining all speed stages included in each pass in the rolling process according to the speed system; and a power consumption determination subunit for each pass, suitable for determining the power consumption of each pass according to the total power required to be output by the rolling mill motor driving the rolling rollers corresponding to all speed stages included in the rolling process of each pass.

[0092] Optionally, the maximum rolling speed calculation unit calculates the maximum rolling speed of each pass using a calculation formula including:

[0093]

[0094] Where V P_max Indicates the maximum rolling speed of each pass, a r represents the roller acceleration, L p Indicates the target board length, v in Indicates the bite speed.

[0095] Optionally, the speed system includes a trapezoidal speed system and a triangular speed system, and the speed system of each pass is determined according to the maximum rolling speed of each pass, including: judging whether the maximum rolling speed of the target pass in each pass exceeds the rolling speed corresponding to the maximum speed of the rolling mill motor of the basic parameter; if so, determining that the speed system of the target pass is a trapezoidal speed system; if not, determining that the speed system of the target pass is a triangular speed system.

[0096] Optionally, if the speed system of the current pass is a trapezoidal speed system, the calculation formula for determining the power consumption of each pass by the power consumption determination subunit of each pass includes:

[0097]

[0098] In the formula, Q i It represents the total rolling torque of each pass, t1 represents the time for the rolled piece to accelerate from rest to the biting speed, N k1 (t) represents the function of rolling no-load power corresponding to time t from static acceleration to biting speed, t2 represents the time when the rolled piece is accelerated to the maximum rolling speed, Na1 (t) represents the function of rolling acceleration power corresponding to time t, t3 represents the uniform rolling time of the rolled piece, N z (t) represents the function of the maximum rolling power corresponding to time t, t4 represents the time for the rolled piece to decelerate to the steel throwing speed, N a2 (t) represents the function of rolling deceleration power corresponding to time t, t5 represents the time from rolling stock throwing steel to stationary, N k2 (t) represents the function of the rolling no-load power from the time when the rolled piece is thrown to a standstill corresponding to the time t.

[0099] Optionally, if the speed system of the current pass is a triangular speed system, the calculation formula for determining the power consumption of each pass by the power consumption determination subunit includes:

[0100]

[0101] Optionally, the parameter acquisition unit includes: a third process parameter acquisition unit, suitable for responding to the user inputting the model of the target rolling mill, the steel grade and the rolling target parameters, to acquire the rolling target parameters as the third process parameters; a first process parameter acquisition unit, suitable for acquiring the first process parameters corresponding to the model of the target rolling mill from a first preset configuration file; and a second process parameter acquisition unit, suitable for acquiring the second process parameters of the target plate corresponding to the steel grade from a second preset configuration file.

[0102] Optionally, the electricity consumption per ton of steel prediction device provided by the present invention also includes: a display unit, suitable for displaying the basic parameters and the electricity consumption per ton of steel of the target plate on a user interface; and an export unit, suitable for exporting the basic parameters and the electricity consumption per ton of steel of the target plate in a preset manner in response to an operation of triggering an export button.

[0103] In a third aspect, the present invention provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the steps of the above method are implemented when the processor executes the program.

[0104] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of the above method when executed by a processor.

[0105] In an embodiment of the present invention, a method for predicting power consumption per ton of steel is provided, wherein the power consumption of each pass is determined by the total power required to be output by the rolling mill motor driving the rolling rollers corresponding to all speed stages, and the power consumption of a ton of steel of the target plate is determined based on the power consumption of each pass. It can be seen that the power consumption per ton of steel determined by the present invention takes into account all stages of rolling, thereby improving the accuracy of power consumption per ton of steel prediction. In addition, the present invention does not rely on data from existing rolling processes, but only relies on factory setting parameters of rolling mills and plates, so that the method can be applied to all rolling mills and plates, and is not limited to old equipment with existing data, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0106] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0107] Figure 1 A flowchart of a method for predicting electricity consumption per ton of steel provided in one embodiment of the present invention;

[0108] Figure 2 is a flowchart of step 100 in one embodiment of the present invention;

[0109] Figure 3 is a flow chart of step 200 in one embodiment of the present invention;

[0110] Figure 4 A flowchart of step 300 in one embodiment of the present invention;

[0111] Figure 5 A schematic diagram of a trapezoidal speed system for a complete rolling process in an embodiment of the present invention;

[0112] Figure 6 A schematic diagram of a triangular speed system for a complete rolling process according to an embodiment of the present invention;

[0113] Figure 7 A schematic diagram of the start and stop sequence of a single-pass rolling mill under a trapezoidal speed system in an embodiment of the present invention;

[0114] Figure 8 A flowchart of a method for predicting electricity consumption per ton of steel provided in another embodiment of the present invention;

[0115] Fig. 9 A schematic diagram of a display interface in one embodiment of the present invention;

[0116] Fig.10 A schematic diagram of a device for predicting electricity consumption per ton of steel provided in an embodiment of the present invention;

[0117] Fig.11 A schematic diagram of a computer device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0118] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0119] In the description of this specification, the terms "include", "including", "have", "contain", etc. are all open terms, which mean including but not limited to. The descriptions with reference to the terms "one embodiment", "a specific embodiment", "some embodiments", "for example", etc. mean that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The order of steps involved in each embodiment is used to schematically illustrate the implementation of the present application, and the order of steps is not limited and can be appropriately adjusted as needed.

[0120] Before explaining the technical solution of the present invention in detail, it should be noted that the acquisition, storage, use, and processing of data in the technical solution of the present invention are in compliance with the relevant provisions of national laws and regulations.

[0121] In order to facilitate understanding of the technical solution provided by this application, the relevant contents of the technical solution of this application are first explained below.

[0122] The present invention can be applied to the prediction of electricity consumption per ton of steel, especially to the prediction of electricity consumption per ton of steel for medium and thick plates. Thick plates are important steel varieties and are widely used in infrastructure construction, shipbuilding, engineering machinery, containers, energy, construction and other industries, and occupy an important position in national economic construction.

[0123] The thick plate rolling process usually includes multiple passes. When rolling steel, one pass is when the plate is rolled once by a rolling mill.

[0124] In order to solve the technical problems of low prediction accuracy and limited application scope of the electricity consumption prediction method per ton of steel in the prior art, an embodiment of the present invention provides a scheme for predicting electricity consumption per ton of steel. The present invention takes into account all stages of rolling, thereby improving the accuracy of the prediction of electricity consumption per ton of steel, and does not rely on data from the existing rolling process, but only relies on the factory setting parameters of the rolling mill and the plate, so that the method can be applied to all rolling mills and plates, and is not limited to old equipment with existing data, and has a wide range of applications.

[0125] like Figure 1 FIG. 1 is a flowchart of a method for predicting electricity consumption per ton of steel provided by an embodiment of the present invention. The method may include the following steps:

[0126] Step 100: Obtain basic parameters.

[0127] The basic parameters include the first process parameter of the rolling mill for rolling the target plate, the second process parameter of the target plate, the third process parameter indicating the rolling target, and the fourth process parameter that changes with the third process parameter. The first process parameter and the second process parameter are both factory setting parameters. As long as the rolling mill or the plate leaves the factory, these parameters are determined, so these parameters are fixed values. The third process parameter is the rolling target parameter input by the user.

[0128] The first process parameters include: rough rolling start temperature, finishing rolling start temperature, working roll diameter, bite speed, rolling acceleration, support roll reaction force arm of working roll, rolling friction force arm between working roll and support roll, support roll diameter, rolling bearing friction coefficient, liquid friction bearing friction coefficient, offset of working roll axis relative to support roll axis, main motor rotor mass, intermediate shaft rotor mass, working roll rotor mass, support roll rotor mass, workpiece rotor mass, universal joint rotor mass, main motor rotor diameter, intermediate shaft rotor mass, working roll rotor diameter, support roll rotor diameter, workpiece rotor diameter, universal joint rotor diameter, motor overload factor of rolling mill, rated power of single motor, motor speed and rolling speed corresponding to maximum motor speed.

[0129] It should be noted that the rolling temperature varies in different rolling stages, and the rolling temperature specifically refers to the rolling temperature in the current stage. For example, in the finishing stage of the rolling process, the rolling temperature is the finishing temperature.

[0130] The second process parameters include: plate thickness, plate width, plate length, rolling deformation zone force arm coefficient and plate initial deformation resistance. The plate initial deformation resistance is the deformation resistance of the plate strip at a specific rolling temperature, specific engineering strain and specific strain rate. The specific rolling temperature, specific engineering strain and specific strain rate set for different plates when leaving the factory are different. For example, the specific rolling temperature, specific engineering strain and specific strain rate set at the factory can be 1000℃, engineering strain 10%, strain rate 10s respectively. -1 The calculation formula of the deformation resistance of the plate will be described below, but it should be noted that as long as a specific rolling temperature, a specific engineering strain and a specific strain rate are set at the factory, the initial deformation resistance is a fixed value.

[0131] The third process parameters include target plate thickness (plate thickness after rolling), target plate width (plate width after rolling), intermediate plate thickness (reduced thickness) and target plate length (plate length after rolling).

[0132] The fourth process parameter includes the arm coefficient of the rolling deformation zone. The arm coefficient of the rolling deformation zone is calculated by the rolling mill based on the thickness of the intermediate plate. The calculation method is an existing technology and will not be repeated here.

[0133] It can be seen that the present invention only relies on the factory setting parameters of the plate and the rolling mill to predict the power consumption per ton of steel of the plate, and does not rely on the existing prediction data. This can be applied to the prediction of power consumption per ton of steel of various new and old plates in any rolling mill, and has a wide range of applications.

[0134] Step 200: Calculate the total power required to be output by the rolling mill motor driving the rolling rollers in each pass according to the basic parameters.

[0135] Step 300: Determine the power consumption of each pass according to the total power required to be output by the rolling mill motor driving the rollers corresponding to all speed stages included in each rolling process.

[0136] Step 400: Determine the power consumption per ton of steel of the target plate according to the power consumption of each pass.

[0137] The method for predicting power consumption per ton of steel provided by the embodiment of the present invention includes determining the power consumption of each pass based on the total power required to be output by the rolling mill motor driving the rolling rollers corresponding to all speed stages, and determining the power consumption per ton of steel of the target plate based on the power consumption of each pass. It can be seen that the power consumption per ton of steel determined by the present invention takes into account all stages of rolling, thereby improving the accuracy of power consumption per ton of steel prediction. In addition, the present invention does not rely on data from existing rolling processes, but only relies on factory setting parameters of rolling mills and plates, so that the method can be applied to all rolling mills and plates, and is not limited to old equipment with existing data, and has a wide range of applications.

[0138] Below Figure 1 The method for predicting electricity consumption per ton of steel shown is explained in detail.

[0139] In some embodiments, Figure 2 As shown, the above step 100 may specifically include:

[0140] Step 110: In response to the user inputting the model of the target rolling mill, the steel grade and the rolling target parameters in the user interface, the rolling target parameters are obtained as the third process parameters.

[0141] It is worth noting that the user can input the target mill model, steel grade and rolling target parameters by: inputting content in the input box or selecting from the option buttons. Of course, other input methods are also possible, and the above two input methods are only exemplary.

[0142] Step 120: Acquire a first process parameter corresponding to the model of the target rolling mill from a first preset configuration file.

[0143] Step 130: Obtain second process parameters of a target plate corresponding to the steel grade from a second preset configuration file.

[0144] The first process parameter, the second process parameter and the third process parameter are as described above and will not be described in detail here.

[0145] The first preset file stores first process parameters corresponding to all rolling mills (indicated by model) included in the market. The second preset file stores second process parameters corresponding to all plate rolling mills (indicated by steel grade) included in the market.

[0146] It can be seen from this that the embodiment of the present invention can achieve that the user can input the steel grade, rolling mill model and target rolling parameters, thereby selecting the factory setting parameters corresponding to the plate and rolling mill, so that the prediction of electricity consumption per ton of steel does not rely on existing data, and is not restricted to new or old types of rolling mills and plates. The application range is wide, and the user can input the plate type to be predicted, the rolling mill model and the rolling target, which can improve the user experience.

[0147] In some embodiments, Figure 3 As shown, step 200 may specifically include:

[0148] Step 210: Calculate the rolling force of each pass in the rolling process according to the basic parameters.

[0149] Furthermore, the rolling force of each pass in the rolling process is calculated based on the proportional coefficient, the deformation resistance of the target plate, the area of ​​the target plate, the rolling temperature, the factory set temperature, the set deformation amount, the set strain rate, the target plate thickness before rolling, the working roll diameter, the target plate thickness after rolling, the target plate width before rolling, the target plate width after rolling and the rolling speed.

[0150] The calculation formula for calculating the rolling force of each pass in the rolling process based on the basic parameters includes:

[0151] P=1.15nσ s F

[0152]

[0153]

[0154]

[0155]

[0156] F=Bl

[0157]

[0158] B=(B1+B2) / 2

[0159] Where P represents the rolling force of any pass, n represents the proportionality coefficient, σ s represents the deformation resistance of the target plate, F represents the area of ​​the target plate, D1 represents the diameter of the working roll, H represents the thickness of the target plate before rolling, and σ0 represents the initial deformation resistance of the target plate at the factory set temperature, set deformation and set strain rate (for example, the target plate at 1000℃, deformation 10%, strain rate 10s -1 where B1 represents the target plate width before rolling and B2 represents the target plate width after rolling.

[0160] Step 220: Calculate the total rolling torque of each pass according to the rolling force and basic parameters of each pass.

[0161] Specifically, the total rolling torque of each pass is calculated according to the rolling force of each pass and the rolling deformation zone arm coefficient, the friction torque of the support roll bearing, the friction torque generated by the friction force in the working roll bearing, the arm of the reaction force of the support roll on the working roll, the rolling friction arm between the working roll and the support roll, the angle between the centerline of the rolling roll and the reaction force of the support roll on the working roll, the angle between the centerline of the working roll and the support roll and the vertical line, the friction circle radius of the working roll bearing, the friction circle radius of the support roll bearing, the support roll diameter, the offset of the working roll axis relative to the support roll axis, the rolling bearing friction coefficient, the liquid friction bearing friction coefficient, angular acceleration, the flywheel torque of the main motor rotor of the rolling mill, the flywheel torque of the intermediate shaft, the flywheel torque of the working roll, the flywheel torque of the support roll, the flywheel torque of the rolled piece, the flywheel torque of the universal joint, the rotor mass and the rotor diameter.

[0162] The calculation formula for calculating the total rolling moment of each pass based on the rolling force and basic parameters of each pass includes:

[0163]

[0164] M Z =Plb

[0165] P=1.15nσ s F

[0166]

[0167] M m =M R +M m1

[0168]

[0169]

[0170]

[0171]

[0172]

[0173]

[0174]

[0175]

[0176] GD 2 =mD 2

[0177] M K =0.06M 总

[0178] Where M 总 Represents the total rolling torque of each pass, M Z Indicates the torque required to complete rolling reduction, M m It represents the additional friction torque required to overcome the bearing friction, M d Indicates the torque required for roller acceleration and deceleration, M K represents the idling torque, i represents the transmission ratio of the reducer, b represents the arm coefficient of the rolling deformation zone, M R Denotes the friction torque of the backup roller bearing, M m1 represents the friction torque generated by the friction force in the working roll bearing, c represents the force arm of the support roll against the working roll, c f represents the rolling friction arm between the working roll and the support roll, γ represents the angle between the centerline of the roll and the reaction force of the support roll on the working roll, θ represents the angle between the centerline of the working roll and the support roll and the vertical line, r1 represents the radius of the friction circle of the working roll bearing, r2 represents the radius of the friction circle of the support roll bearing, D2 represents the diameter of the support roll, e represents the offset of the axis of the working roll relative to the axis of the support roll, μ1 represents the friction coefficient of the rolling bearing, μ2 represents the friction coefficient of the liquid friction bearing, a j represents the angular acceleration, They respectively represent the flywheel torque of the main motor rotor of the rolling mill, the flywheel torque of the intermediate shaft, the flywheel torque of the working roll, the flywheel torque of the support roll, the flywheel torque of the rolled piece, and the flywheel torque of the universal joint. m represents the rotor mass, and D represents the rotor diameter.

[0179] Step 230: Calculate the total power required to be output by the motor-driven rollers in each pass according to the basic parameters and the total rolling torque of each pass.

[0180] Furthermore, the total power required to be output by the motor-driven rollers in each pass is calculated according to the motor speed of the rolling mill and the total rolling torque of each pass. The calculation formula includes:

[0181]

[0182] Where n 电 It is the speed of rolling mill motor, in r / min.

[0183] In some embodiments, Figure 4 As shown, step 300 may specifically include:

[0184] Step 310: Calculate the maximum rolling speed of each pass. The calculation formula for calculating the maximum rolling speed of each pass includes:

[0185]

[0186] Where V P_max Indicates the maximum rolling speed of each pass, a r represents the roller acceleration, L p Indicates the target board length, v in Indicates the bite speed.

[0187] Step 320: Determine the speed regime for each pass according to the maximum rolling speed for each pass.

[0188] Specifically: determine whether the maximum rolling speed of the target pass in each pass exceeds the rolling speed corresponding to the maximum speed of the rolling mill motor of the basic parameters. If so, determine that the speed system of the target pass is a trapezoidal speed system, and at this time, the maximum rolling speed of the target pass in each pass is the rolling speed corresponding to the maximum speed of the rolling mill motor. If the maximum rolling speed of the target pass in each pass does not exceed the rolling speed corresponding to the maximum speed of the rolling mill motor of the basic parameters, determine that the speed system of the target pass is a triangular speed system, and at this time, the maximum rolling speed of the target pass is the maximum rolling speed of the current pass.

[0189] The speed system in the embodiment of the present invention includes a trapezoidal speed system and a triangular speed system. The trapezoidal speed system of the complete rolling process is as follows: Figure 5 As shown in the figure, v in Indicates the bite speed, v out Indicates the throwing speed, v r Indicates the maximum rolling speed of each pass, t z ,t a ,t kThey represent the uniform rolling time, rolling acceleration and deceleration time, and no-load time. The triangular speed system of the complete rolling process is as follows: Figure 6 Further, the start-stop sequence diagram of the rolling mill for a single pass under the trapezoidal speed system is shown in Figure 7 As shown in the figure, t k1 ,t a1 ,t z ,t a2 ,t k2 They respectively represent the no-load acceleration time (the time from acceleration from rest to the biting speed), the biting acceleration time (the time for the rolled piece to accelerate to the maximum rolling speed), the uniform rolling time (the time for the rolled piece to roll at a uniform speed), the deceleration time (the time for the rolled piece to decelerate to the steel throwing speed) and the no-load deceleration time (the time for the rolled piece to drop steel to rest).

[0190] Step 330: Determine all speed stages included in each pass during the rolling process according to the speed system.

[0191] Generally speaking, the single-pass rolling process under the trapezoidal speed system can be divided into the following stages according to the time sequence: the single-pass rolling process can be divided into the no-load acceleration stage, the bite acceleration stage, the uniform rolling stage, the deceleration stage and the no-load deceleration stage according to the time sequence. Therefore, all the speed stages included in the trapezoidal speed system are: the no-load acceleration stage, the bite acceleration stage, the uniform rolling stage, the deceleration stage and the no-load deceleration stage.

[0192] In addition, under the trapezoidal speed system, the single-pass rolling process can be divided into the following stages according to the time sequence: the single-pass rolling process can be divided into the no-load acceleration stage, the bite acceleration stage, the deceleration stage and the no-load deceleration stage according to the time sequence. Therefore, all the speed stages included in the triangular speed system are: the no-load acceleration stage, the bite acceleration stage, the deceleration stage and the no-load deceleration stage.

[0193] Step 340: Determine the power consumption of each pass according to the total power required to be output by the rolling mill motor driving the rollers corresponding to all speed stages included in each pass during the rolling process.

[0194] If the speed system of the current pass is a trapezoidal speed system, the calculation formula for determining the power consumption of each pass according to the total power required to be output by the rolling mill motor driving the rollers corresponding to all speed stages included in each pass during the rolling process includes:

[0195]

[0196] In the formula, Q i It represents the total rolling torque of each pass, t1 represents the time for the rolled piece to accelerate from rest to the biting speed, N k1 (t) represents the function of rolling no-load power corresponding to time t from static acceleration to biting speed, t2 represents the time when the rolled piece is accelerated to the maximum rolling speed, Na1 (t) represents the function of rolling acceleration power corresponding to time t, t3 represents the uniform rolling time of the rolled piece, N z (t) represents the function of the maximum rolling power corresponding to time t, t4 represents the time for the rolled piece to decelerate to the steel throwing speed, N a2 (t) represents the function of rolling deceleration power corresponding to time t, t5 represents the time from rolling stock throwing steel to stationary, N k2 (t) represents the function of the rolling no-load power from the time when the rolled piece is thrown to a standstill corresponding to the time t.

[0197] If the speed system of the current pass is a triangular speed system, the calculation formula for determining the power consumption of each pass according to the total power required to be output by the rolling mill motor driving the rollers corresponding to all speed stages included in each pass during the rolling process includes:

[0198]

[0199] After obtaining the power consumption of each pass, the power consumption per ton of steel of the target plate is further determined according to the power consumption of each pass. Therefore, in some embodiments, step 400 may specifically include: firstly, summing the power consumption of each pass to obtain the power consumed by rolling the target plate, and the calculation formula includes: Then, the ratio of the power consumption of the target plate rolling to the target plate mass is calculated to obtain the power consumption per ton of steel of the target plate. The calculation formula includes: Where D represents the power consumption per ton of steel, and m represents the target plate mass, in tons (t).

[0200] In order to facilitate users to view the prediction results and basic parameters, in some embodiments, such as Figure 8 The method further comprises:

[0201] Step 500: Display the basic parameters and the power consumption per ton of steel of the target plate on the user interface. Further, part of the basic parameters and the power consumption per ton of steel of the target plate may be displayed.

[0202] The specific method of displaying the basic parameters and the power consumption per ton of steel of the target plate in the user interface can be set according to the actual application scenario, and the present invention does not limit this. For example, the prediction results of the power consumption per ton of steel of some basic parameters and the target plate are displayed in a table form. Fig. 9 As shown below. Fig. 9The meanings of some fields in the display interface shown are: PASS NO. (indicating the rolling pass sequence number), PASS STAGE (indicating the rough rolling or finishing rolling process), PLATECHICK (indicating the plate thickness), PLATE WIDTH (indicating the plate width), PLATE LEGTH (indicating the plate length), ROLLING FORCE (indicating the rolling force), ROLLING TORQUE (indicating the rolling torque), TORQUE RATED (indicating the torque overload coefficient), SPEED MAX (indicating the maximum rolling speed), ROLLING TEPM (indicating the rolling temperature), ROLLING TIME (indicating the rolling time), ANGLE BIT (indicating the bite angle), ROLLING POWER (indicating the rolling power), ROLLINGPOWER_MAX (indicating the maximum rolling power), ROLLING ENERGY (indicates the power consumption during rolling), steel grade (indicates the steel brand), slab thickness (indicates the plate thickness), slab width (indicates the plate width), slab length (indicates the plate length), intermediate billet thickness (indicates the intermediate plate thickness), steel plate thickness (indicates the target plate thickness), steel plate width (indicates the target plate width), etc.

[0203] Step 600: In response to the operation of triggering the export button, the basic parameters displayed in the display interface and the predicted results of the electricity consumption per ton of steel of the target plate are exported in a preset manner.

[0204] The preset method can be set according to the actual application scenario. For example, the preset method can be a report, which means that the basic parameters displayed in the display interface and the predicted results of the electricity consumption per ton of steel of the target plate are exported in the form of a report.

[0205] In this way, users can export the basic parameters and the electricity consumption per ton of steel predicted results of the target plate for storage.

[0206] It is worth noting that the method for predicting electricity consumption per ton of steel provided by the present invention can be further understood as providing a prediction software for electricity consumption per ton of steel of a plate. The user only needs to input the model of the target rolling mill, the steel grade and the rolling target parameters at the input end to predict the electricity consumption per ton of steel of the target plate, thereby improving the prediction efficiency of electricity consumption per ton of steel. And when applied, a large number of factory settings of the rolling mill and the plate will be obtained, thereby using a large amount of factory data as support to improve the prediction accuracy. And it is applicable to various new and old rolling mills and plates, as long as the factory setting parameters can be obtained, thereby improving the application scope of the prediction of electricity consumption per ton of steel.

[0207] The method for predicting electricity consumption per ton of steel proposed in the present invention is mainly used in the production scheduling and design selection of rolling mills. For example, in the previous design of rolling mills, the required power is calculated based on the rolling force given by the design target, and the calculation result is multiplied by a larger safety factor to ensure that the rolling mill motor has sufficient capacity to complete the rolling. However, this method is an extensive approach, and the calculated power of the rolling mill motor is inaccurate, which makes the power of the rolling mill motor too large, which will increase the cost of the motor and the working range of the motor is not the most stable. When the method for predicting electricity consumption per ton of steel of the present invention is used to select the rolling mill motor, it can be accurate to the maximum power that the motor needs to provide, and the safety factor can be appropriately smaller, thereby reducing the power of the rolling mill motor selection and reducing the cost of the rolling mill motor. At the same time, it can also select a suitable rolling mill motor according to the stable power output range of the rolling mill motor to increase the life of the rolling mill motor.

[0208] The present invention also provides a device for predicting electricity consumption per ton of steel, as described in the following embodiments. Since the principle of solving the problem by the device is similar to that of predicting electricity consumption per ton of steel, the implementation of the device can refer to the implementation of predicting electricity consumption per ton of steel, and the repeated parts will not be repeated.

[0209] Fig.10 This is a schematic diagram of a device for predicting electricity consumption per ton of steel provided in an embodiment of the present invention, the device comprising:

[0210] The parameter acquisition unit 10 is suitable for acquiring basic parameters, which include a first process parameter of a rolling mill for rolling a target plate, a second process parameter of the target plate and a third process parameter representing a rolling target, wherein the first process parameter and the second process parameter are factory setting parameters, and the third process parameter is a rolling target parameter input by a user.

[0211] The required total output power calculation unit 20 is adapted to calculate the total output power required for the rolling mill motor to drive the rolling rollers in each pass according to the basic parameters.

[0212] The power consumption determination unit 30 for each pass is adapted to determine the power consumption for each pass according to the total power required to be output by the rolling mill motor driving the rolling rollers corresponding to all speed stages included in the rolling process for each pass.

[0213] The power consumption per ton of steel determining unit 40 is adapted to determine the power consumption per ton of steel of the target plate according to the power consumption of each pass.

[0214] In some embodiments, the required total output power calculation unit 20 includes: a rolling force calculation unit, suitable for calculating the rolling force of each pass in the rolling process according to the basic parameters; a total rolling torque calculation unit, suitable for calculating the total rolling torque of each pass according to the rolling force of each pass and the basic parameters; a required total output power sub-calculation unit, suitable for calculating the total power required to be output by the motor-driven rolling roller in each pass according to the basic parameters and the total rolling torque of each pass.

[0215] In some embodiments, the rolling force calculation unit calculates the rolling force of each pass in the rolling process using a calculation formula including:

[0216] P=1.15nσ s F

[0217] Where P represents the rolling force of any pass, n represents the proportionality coefficient, σ s represents the deformation resistance of the target plate, and F represents the area of ​​the target plate.

[0218] In some embodiments, the rolling force calculation unit calculates the rolling force of each pass in the rolling process using a calculation formula that further includes:

[0219]

[0220]

[0221]

[0222]

[0223] F=Bl

[0224]

[0225] B=(B1+B2) / 2

[0226] Where D1 represents the working roll diameter, H represents the target plate thickness before rolling, and σ0 represents the target plate thickness at 1000°C, 10% deformation, and 10s strain rate. -1 T represents the deformation resistance under rolling temperature, h represents the target plate thickness after rolling, v represents the rolling speed, B1 represents the target plate width before rolling, and B2 represents the target plate width after rolling.

[0227] In some embodiments, the total rolling torque calculation unit calculates the total rolling torque of each pass using a calculation formula including:

[0228]

[0229] Where M 总 Represents the total rolling torque of each pass, M ZIndicates the torque required to complete rolling reduction, M m It represents the additional friction torque required to overcome the bearing friction, M d Indicates the torque required for roller acceleration and deceleration, M K represents the idling torque, and i represents the transmission ratio of the reducer.

[0230] In some embodiments, the calculation formula for calculating the total rolling torque of each pass by the total rolling torque calculation unit further includes:

[0231] M Z =Plb

[0232] P=1.15nσ s F

[0233]

[0234] M m =M R +M m1

[0235]

[0236]

[0237]

[0238]

[0239]

[0240]

[0241]

[0242]

[0243] GD 2 =mD 2

[0244] M K =0.06M 总

[0245] Where b represents the force arm coefficient of the rolling deformation zone, M R Denotes the friction torque of the backup roller bearing, M m1 represents the friction torque generated by the friction force in the working roll bearing, c represents the force arm of the support roll against the working roll, c frepresents the rolling friction arm between the working roll and the support roll, γ represents the angle between the centerline of the roll and the reaction force of the support roll on the working roll, θ represents the angle between the centerline of the working roll and the support roll and the vertical line, r1 represents the friction circle radius of the working roll bearing, r2 represents the friction circle radius of the support roll bearing, D2 represents, e represents, μ1 represents, μ2 represents, a j express, They respectively represent the flywheel torque of the main motor rotor of the rolling mill, the flywheel torque of the intermediate shaft, the flywheel torque of the working roll, the flywheel torque of the support roll, the flywheel torque of the rolled piece, and the flywheel torque of the universal joint. m represents the rotor mass, and D represents the rotor diameter.

[0246] In some embodiments, the calculation formula for calculating the total power required to be output by the motor-driven roller in each pass according to the basic parameters and the total rolling torque of each pass includes:

[0247]

[0248] Where n 电 It is the speed of rolling mill motor, in r / min.

[0249] In some embodiments, the power consumption determination unit 30 for each pass includes: a maximum rolling speed calculation unit, suitable for calculating the maximum rolling speed of each pass; a speed system determination unit, suitable for determining the speed system of each pass according to the maximum rolling speed of each pass; an all speed stage determination unit, suitable for determining all speed stages included in each pass in the rolling process according to the speed system; a power consumption determination subunit for each pass, suitable for determining the power consumption of each pass according to the total power required to be output by the rolling mill motor driving the rolling rollers corresponding to all speed stages included in the rolling process of each pass.

[0250] In some embodiments, the maximum rolling speed calculation unit calculates the maximum rolling speed of each pass using a calculation formula including:

[0251]

[0252] Where M 总 Represents the total rolling torque of each pass, M Z Indicates the torque required to complete rolling reduction, M m It represents the additional friction torque required to overcome the bearing friction, M d Indicates the torque required for roller acceleration and deceleration, M K represents the idling torque, and i represents the transmission ratio of the reducer.

[0253] In some embodiments, the speed system includes a trapezoidal speed system and a triangular speed system. Determining the speed system of each pass according to the maximum rolling speed of each pass includes: judging whether the maximum rolling speed of the target pass in each pass exceeds the rolling speed corresponding to the maximum speed of the rolling mill motor of the basic parameter; if so, determining that the speed system of the target pass is a trapezoidal speed system; if not, determining that the speed system of the target pass is a triangular speed system.

[0254] In some embodiments, if the speed system of the current pass is a trapezoidal speed system, the calculation formula for determining the power consumption of each pass by the power consumption determination subunit includes:

[0255]

[0256] In the formula, Q i It represents the total rolling torque of each pass, t1 represents the time for the rolled piece to accelerate from rest to the biting speed, N k1 (t) represents the function of rolling no-load power corresponding to time t from static acceleration to biting speed, t2 represents the time when the rolled piece is accelerated to the maximum rolling speed, N a1 (t) represents the function of rolling acceleration power corresponding to time t, t3 represents the uniform rolling time of the rolled piece, N z (t) represents the function of the maximum rolling power corresponding to time t, t4 represents the time for the rolled piece to decelerate to the steel throwing speed, N a2 (t) represents the function of rolling deceleration power corresponding to time t, t5 represents the time from rolling stock throwing steel to stationary, N k2 (t) represents the function of the rolling no-load power from the time when the rolled piece is thrown to a standstill corresponding to the time t.

[0257] In some embodiments, if the speed system of the current pass is a triangular speed system, the calculation formula for determining the power consumption of each pass by the power consumption determination subunit includes:

[0258]

[0259] In some embodiments, the power consumption per ton of steel determination unit 40 includes: a rolling power consumption determination unit, suitable for summing the power consumption of each pass to obtain the power consumed for rolling the target plate; a power consumption per ton of steel determination subunit, suitable for calculating the ratio of the power consumed for rolling the target plate to the mass of the target plate to obtain the power consumption per ton of steel of the target plate.

[0260] In some embodiments, the parameter acquisition unit 10 includes: a third process parameter acquisition unit, adapted to respond to a user inputting a target rolling mill model, a steel grade and a rolling target parameter, and acquire the rolling target parameter as the third process parameter; a first process parameter acquisition unit, adapted to acquire a first process parameter corresponding to the target rolling mill model from a first preset configuration file; and a second process parameter acquisition unit, adapted to acquire the second process parameter of the target plate corresponding to the steel grade from a second preset configuration file.

[0261] The device provided by the embodiment of the present invention includes a total power output required by the rolling mill motor driving the rolling rollers corresponding to all speed stages to determine the power consumption of each pass, and the power consumption per ton of steel of the target plate is determined according to the power consumption of each pass. It can be seen that the power consumption per ton of steel determined by the present invention takes into account all stages of rolling, thereby improving the accuracy of the power consumption per ton of steel prediction. In addition, the present invention does not rely on data from the existing rolling process, but only relies on the factory setting parameters of the rolling mill and the plate, so that the method can be applied to all rolling mills and plates, and is not limited to old equipment with existing data, and has a wide range of applications.

[0262] The embodiments of the present application also provide a specific implementation of an electronic device capable of implementing all steps in the method for predicting power consumption per ton of steel in the above embodiments, see Fig.11 , electronic equipment specifically includes the following:

[0263] Processor (processor) 1101, memory (memory) 1102, communication interface (CommunicationsInterface) 1103 and communication bus 1104;

[0264] The processor 1101, the memory 1102, and the communication interface 1103 communicate with each other via the communication bus 1104; the communication interface 1103 is used to realize information transmission between relevant devices such as the server-side device, the parameter acquisition device, and the user-side device.

[0265] The processor 1101 is used to call the computer program in the memory 1102. When the processor executes the computer program, all the steps in the method for predicting electricity consumption per ton of steel in the above embodiment are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0266] Step 100: Obtain basic parameters.

[0267] Step 200: Calculate the total power required to be output by the rolling mill motor driving the rolling rollers in each pass according to the basic parameters.

[0268] Step 300: Determine the power consumption of each pass according to the total power required to be output by the rolling mill motor driving the rollers corresponding to all speed stages included in each rolling process.

[0269] Step 400: Determine the power consumption per ton of steel of the target plate according to the power consumption of each pass.

[0270] From the above description, it can be seen that the electronic device in the embodiment of the present application proposes a method for predicting power consumption per ton of steel, in which the total power required to be output by the rolling mill motor driving the rolling rollers corresponding to all speed stages included determines the power consumption of each pass, and the power consumption of a ton of steel of the target plate is determined according to the power consumption of each pass. It can be seen that the power consumption per ton of steel determined by the present invention takes into account all stages of rolling, thereby improving the accuracy of the prediction of power consumption per ton of steel. In addition, the present invention does not rely on data from the existing rolling process, but only relies on the factory setting parameters of the rolling mill and the plate, so that the method can be applied to all rolling mills and plates, and is not limited to old equipment with existing data, and has a wide range of applications.

[0271] The embodiments of the present application also provide a computer-readable storage medium capable of implementing all the steps of the method for predicting electricity consumption per ton of steel in the above embodiments. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, all the steps of the method for predicting electricity consumption per ton of steel in the above embodiments are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0272] Step 100: Obtain basic parameters.

[0273] Step 200: Calculate the total power required to be output by the rolling mill motor driving the rolling rollers in each pass according to the basic parameters.

[0274] Step 300: Determine the power consumption of each pass according to the total power required to be output by the rolling mill motor driving the rollers corresponding to all speed stages included in each rolling process.

[0275] Step 400: Determine the power consumption per ton of steel of the target plate according to the power consumption of each pass.

[0276] From the above description, it can be seen that the computer-readable storage medium in the embodiment of the present application proposes a method for predicting power consumption per ton of steel, in which the total power required to be output by the rolling mill motor driving the rolling rollers corresponding to all speed stages included determines the power consumption of each pass, and the power consumption of a ton of steel of the target plate is determined according to the power consumption of each pass. It can be seen that the power consumption per ton of steel determined by the present invention takes into account all stages of rolling, thereby improving the accuracy of the prediction of power consumption per ton of steel. In addition, the present invention does not rely on data from the existing rolling process, but only relies on the factory setting parameters of the rolling mill and the plate, so that the method can be applied to all rolling mills and plates, and is not limited to old equipment with existing data, and has a wide range of applications.

[0277] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the hardware + program embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0278] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0279] Although the present application provides method operation steps such as embodiments or flow charts, more or fewer operation steps may be included based on conventional or non-creative labor. The order of steps listed in the embodiments is only one way of executing the order of many steps and does not represent the only execution order. When the device or user-end product in practice is executed, it can be executed in the order of the method shown in the embodiments or the drawings or in parallel (for example, in a parallel processor or multi-threaded processing environment).

[0280] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0281] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0282] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0283] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0284] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for predicting electricity consumption per ton of steel, characterized in that: include: Acquire basic parameters, wherein the basic parameters include a first process parameter of a rolling mill for rolling a target plate, a second process parameter of the target plate, a third process parameter indicating a rolling target, and a fourth process parameter that changes with the third process parameter, wherein the first process parameter and the second process parameter are factory setting parameters, and the third process parameter is a rolling target parameter input by a user; Calculate the total power required to be output by the rolling mill motor driving the rolling rollers in each pass according to the basic parameters; The power consumption of each pass is determined according to the total power required to be output by the rolling mill motor driving the rollers corresponding to all speed stages included in each rolling process; The power consumption per ton of steel of the target plate is determined according to the power consumption of each pass.

2. The method according to claim 1, characterized in that The calculation of the total power required to be output by the motor-driven rollers in each pass according to the basic parameters includes: Calculate the rolling force of each pass in the rolling process according to the basic parameters; Calculating the total rolling moment of each pass according to the rolling force of each pass and the basic parameters; The total power required to be output by the motor-driven rollers in each pass is calculated according to the basic parameters and the total rolling torque of each pass.

3. The method according to claim 2, characterized in that The calculation formula for calculating the rolling force of each pass in the rolling process according to the basic parameters includes: P=1.15nσ s F Where P represents the rolling force of any pass, n represents the proportionality coefficient, σ s represents the deformation resistance of the target plate, and F represents the area of ​​the target plate.

4. The method according to claim 3, characterized in that The calculation formula for calculating the rolling force of each pass in the rolling process according to the basic parameters also includes: F=Bl B=(B1+B2) / 2 Where D1 represents the working roll diameter, H represents the target plate thickness before rolling, and σ0 represents the initial deformation resistance of the target plate at the factory set temperature, set deformation amount and set strain rate. T represents the rolling temperature, h represents the target plate thickness after rolling, v represents the rolling speed, B1 represents the target plate width before rolling, and B2 represents the target plate width after rolling.

5. The method according to claim 2, characterized in that The calculation formula for calculating the total rolling torque of each pass according to the rolling force of each pass and the basic parameters includes: Where M 总 Represents the total rolling torque of each pass, M Z Indicates the torque required to complete rolling reduction, M m It represents the additional friction torque required to overcome the bearing friction, M d Indicates the torque required for roller acceleration and deceleration, M K represents the idling torque, and i represents the transmission ratio of the reducer.

6. The method according to claim 5, characterized in that The calculation formula for calculating the total rolling torque of each pass according to the rolling force of each pass and the basic parameters also includes: M Z =Plb P=1.15nσ s F M m =M R +M m1 GD 2 =mD 2 M K =0.06M 总 Where b represents the force arm coefficient of the rolling deformation zone, M R represents the friction torque of the backup roller bearing, M m1 represents the friction torque generated by the friction force in the working roll bearing, c represents the force arm of the support roll against the working roll, c f represents the rolling friction arm between the working roll and the support roll, γ represents the angle between the centerline of the roll and the reaction force of the support roll on the working roll, θ represents the angle between the centerline of the working roll and the support roll and the vertical line, r1 represents the radius of the friction circle of the working roll bearing, r2 represents the radius of the friction circle of the support roll bearing, D2 represents the diameter of the support roll, e represents the offset of the axis of the working roll relative to the axis of the support roll, μ1 represents the friction coefficient of the rolling bearing, μ2 represents the friction coefficient of the liquid friction bearing, a j represents the angular acceleration, They respectively represent the flywheel torque of the main motor rotor of the rolling mill, the flywheel torque of the intermediate shaft, the flywheel torque of the working roll, the flywheel torque of the support roll, the flywheel torque of the rolled piece, and the flywheel torque of the universal joint. m represents the rotor mass, and D represents the rotor diameter.

7. The method according to claim 2, characterized in that The calculation formula for calculating the total power required to be output by the motor-driven rollers in each pass according to the basic parameters and the total rolling torque of each pass includes: Where n 电 is the rolling mill motor speed.

8. The method according to claim 1, characterized in that The power consumption of each pass is determined according to the total power required to be output by the motor-driven rollers corresponding to all speed stages included in each rolling process, including: Calculate the maximum rolling speed for each pass; Determine the speed system of each pass according to the maximum rolling speed of each pass; Determine all speed stages included in each pass during the rolling process according to the speed system; The power consumption of each pass is determined according to the total power required to be output by the rolling mill motor driving the rolling rollers corresponding to all speed stages included in each pass during the rolling process.

9. The method according to claim 8, characterized in that The calculation formula for calculating the maximum rolling speed of each pass includes: Where V P_max Indicates the maximum rolling speed of each pass, a r represents the roller acceleration, L p Indicates the target board length, v in Indicates the bite speed.

10. The method according to claim 8, characterized in that The speed system includes a trapezoidal speed system and a triangular speed system. The speed system of each pass determined according to the maximum rolling speed of each pass includes: Determine whether the maximum rolling speed of the target pass in each pass exceeds the rolling speed corresponding to the maximum speed of the rolling mill motor of the basic parameter. If so, determine that the speed system of the target pass is a trapezoidal speed system; if not, determine that the speed system of the target pass is a triangular speed system.

11. The method according to claim 10, characterized in that If the speed system of the current pass is a trapezoidal speed system, the calculation formula for determining the power consumption of each pass is as follows: include: In the formula, Q i It represents the total rolling torque of each pass, t1 Indicates the time it takes for the rolled piece to accelerate from rest to the biting speed, N k1 (t) represents the function of rolling no-load power corresponding to time t from static acceleration to bite speed, t2 Indicates the time it takes for the rolled piece to accelerate to the maximum rolling speed, N a1 (t) represents the function of rolling acceleration power corresponding to time t, t3 Indicates the uniform rolling time of the rolled piece, N z (t) represents the function of the maximum rolling power corresponding to time t, t4 Indicates the time it takes for the rolled piece to decelerate to the throwing speed, N a2 (t) represents the function of rolling deceleration power corresponding to time t, t5 Indicates the time from the rolled piece being thrown to being stationary, N k2 (t) represents the function of the rolling no-load power from the time when the rolled piece is thrown to a standstill corresponding to the time t.

12. The method according to claim 10, characterized in that If the speed system of the current pass is a triangular speed system, the calculation formula for determining the power consumption of each pass is as follows: include:

13. The method according to claim 1, characterized in that Determining the power consumption per ton of steel of the target plate according to the power consumption of each pass includes: The power consumption of each pass is summed to obtain the power consumed by rolling the target plate; The ratio of the electric energy consumed in rolling the target plate to the mass of the target plate is calculated to obtain the electric energy consumption per ton of steel of the target plate.

14. The method according to claim 1, wherein: The basic parameters for obtaining the target plate include: In response to a user inputting a model of a target rolling mill, a steel grade, and a rolling target parameter, acquiring the rolling target parameter as the third process parameter; Acquire a first process parameter corresponding to the model of the target rolling mill from a first preset configuration file; The second process parameter of the target plate corresponding to the steel grade is obtained from a second preset configuration file.

15. The method according to claim 1, wherein: The method further comprises: Display part or all of the basic parameters and the predicted results of electricity consumption per ton of steel of the target plate on the interface; In response to the operation of triggering the export button, the basic parameters displayed on the display interface and the predicted results of the electricity consumption per ton of steel of the target plate are exported in a preset manner.

16. The method according to claim 1, wherein: The first process parameters include rough rolling start temperature, finish rolling start temperature, working roll diameter, bite speed, rolling acceleration, support roll reaction force arm of working roll, rolling friction force arm between working roll and support roll, support roll diameter, rolling bearing friction coefficient, liquid friction bearing friction coefficient, offset of working roll axis relative to support roll axis, rotor mass of main motor, rotor mass of intermediate shaft, rotor mass of working roll, rotor mass of support roll, rotor mass of rolled product, rotor mass of universal joint, rotor diameter of main motor, rotor mass of intermediate shaft, rotor diameter of working roll, rotor diameter of support roll, rotor diameter of rolled product, rotor diameter of universal joint, rolling mill motor overload factor, rated power of single motor of rolling mill, rolling mill motor speed, rolling speed corresponding to maximum motor speed, factory set temperature, set deformation and set strain rate; The second process parameters include plate thickness, plate width, plate length and initial deformation resistance of the plate, where the initial deformation resistance of the plate is the deformation resistance of the plate strip at a specific rolling temperature, a specific engineering strain and a specific strain rate; The third process parameters include target plate thickness, target plate width, middle plate thickness and target plate length; The fourth process parameter includes the rolling deformation zone force arm coefficient.

17. A device for predicting electricity consumption per ton of steel, characterized in that: include: a parameter acquisition unit, adapted to acquire basic parameters, the basic parameters including a first process parameter of a rolling mill for rolling a target plate, a second process parameter of the target plate, a third process parameter indicating a rolling target, and a fourth process parameter varying with the third process parameter, the first process parameter and the second process parameter being factory setting parameters, and the third process parameter being a rolling target parameter input by a user; A required total output power calculation unit, adapted to calculate the total output power required for the rolling mill motor to drive the rolling rollers in each pass according to the basic parameters; The power consumption determination unit for each pass is adapted to determine the power consumption for each pass according to the total power required to be output by the rolling mill motor driving the rollers corresponding to all speed stages included in the rolling process for each pass; The power consumption per ton of steel determining unit is adapted to determine the power consumption per ton of steel of the target plate according to the power consumption of each pass.

18. The device according to claim 17, characterized in that The required total output power calculation unit comprises: A rolling force calculation unit, adapted to calculate the rolling force of each pass in the rolling process according to the basic parameters; A total rolling moment calculation unit, adapted to calculate the total rolling moment of each pass according to the rolling force of each pass and the basic parameters; The required total output power sub-calculation unit is suitable for calculating the total output power required by the motor-driven rollers in each pass according to the basic parameters and the total rolling torque of each pass.

19. The device according to claim 18, characterized in that The calculation formula for the rolling force calculation unit to calculate the rolling force of each pass in the rolling process includes: P=1.15nσ s F Where P represents the rolling force of any pass, n represents the proportionality coefficient, σ s represents the deformation resistance of the target plate, and F represents the area of ​​the target plate.

20. The device according to claim 19, characterized in that The calculation formula for calculating the rolling force of each pass in the rolling process by the rolling force calculation unit also includes: F=Bl B=(B1+B2) / 2 Where D1 represents the working roll diameter, H represents the target plate thickness before rolling, and σ0 represents the initial deformation resistance of the target plate at the factory set temperature, set deformation amount and set strain rate. T represents the rolling temperature, h represents the target plate thickness after rolling, v represents the rolling speed, B1 represents the target plate width before rolling, and B2 represents the target plate width after rolling.

21. The device according to claim 18, characterized in that The calculation formula for calculating the total rolling torque of each pass by the rolling total torque calculation unit includes: Where M 总 Represents the total rolling torque of each pass, M Z Indicates the torque required to complete rolling reduction, M m It represents the additional friction torque required to overcome the bearing friction, M d Indicates the torque required for roller acceleration and deceleration, M K represents the idling torque, and i represents the transmission ratio of the reducer.

22. The device according to claim 21, characterized in that The calculation formula for calculating the total rolling torque of each pass by the total rolling torque calculation unit also includes: M Z =Plb P=1.15nσ s F M m =M R +M m1 GD 2 =mD 2 M K =0.06M 总 Where b represents the force arm coefficient of the rolling deformation zone, M R represents the friction torque of the backup roller bearing, M m1 represents the friction torque generated by the friction force in the working roll bearing, c represents the force arm of the support roll against the working roll, c f represents the rolling friction arm between the working roll and the support roll, γ represents the angle between the centerline of the roll and the reaction force of the support roll on the working roll, θ represents the angle between the centerline of the working roll and the support roll and the vertical line, r1 represents the radius of the friction circle of the working roll bearing, r2 represents the radius of the friction circle of the support roll bearing, D2 represents the diameter of the support roll, e represents the offset of the axis of the working roll relative to the axis of the support roll, μ1 represents the friction coefficient of the rolling bearing, μ2 represents the friction coefficient of the liquid friction bearing, a j represents the angular acceleration, They respectively represent the flywheel torque of the main motor rotor of the rolling mill, the flywheel torque of the intermediate shaft, the flywheel torque of the working roll, the flywheel torque of the support roll, the flywheel torque of the rolled piece, and the flywheel torque of the universal joint. m represents the rotor mass, and D represents the rotor diameter.

23. The device according to claim 18, characterized in that The calculation formula for calculating the total power required to be output by the motor-driven rollers in each pass according to the basic parameters and the total rolling torque of each pass includes: Where n 电 It is the speed of rolling mill motor, in r / min.

24. The device according to claim 17, characterized in that The power consumption determination unit for each pass includes: A maximum rolling speed calculation unit, suitable for calculating the maximum rolling speed of each pass; A speed system determination unit, adapted to determine the speed system of each pass according to the maximum rolling speed of each pass; All speed stage determination units, adapted to determine all speed stages included in each pass during the rolling process according to the speed regime; The power consumption determination subunit for each pass is adapted to determine the power consumption for each pass according to the total power required to be output by the rolling mill motor driving the rolling rollers corresponding to all speed stages included in each pass during the rolling process.

25. The device according to claim 24, characterized in that The maximum rolling speed calculation unit calculates the maximum rolling speed of each pass using the following calculation formula: Where V P_max Indicates the maximum rolling speed of each pass, a r represents the roller acceleration, L p Indicates the target board length, v in Indicates the bite speed.

26. The device according to claim 24, characterized in that The speed system includes a trapezoidal speed system and a triangular speed system. The speed system of each pass determined according to the maximum rolling speed of each pass includes: Determine whether the maximum rolling speed of the target pass in each pass exceeds the rolling speed corresponding to the maximum speed of the rolling mill motor of the basic parameter. If so, determine that the speed system of the target pass is a trapezoidal speed system; if not, determine that the speed system of the target pass is a triangular speed system.

27. The device according to claim 26, characterized in that If the speed system of the current pass is a trapezoidal speed system, the calculation formula for determining the power consumption of each pass by the power consumption determination subunit includes: In the formula, Q i It represents the total rolling torque of each pass, t1 Indicates the time it takes for the rolled piece to accelerate from rest to the biting speed, N k1 (t) represents the function of rolling no-load power corresponding to time t from static acceleration to bite speed, t2 Indicates the time it takes for the rolled piece to accelerate to the maximum rolling speed, N a1 (t) represents the function of rolling acceleration power corresponding to time t, t3 Indicates the uniform rolling time of the rolled piece, N z (t) represents the function of the maximum rolling power corresponding to time t, t4 Indicates the time it takes for the rolled piece to decelerate to the throwing speed, N a2 (t) represents the function of rolling deceleration power corresponding to time t, t5 Indicates the time from the rolled piece being thrown to being stationary, N k2 (t) represents the function of the rolling no-load power from the time when the rolled piece is thrown to a standstill corresponding to the time t.

28. The device according to claim 26, characterized in that If the speed system of the current pass is a triangular speed system, the calculation formula for determining the power consumption of each pass by the power consumption determination subunit includes:

29. The device according to claim 17, characterized in that The parameter acquisition unit comprises: a third process parameter acquisition unit, adapted to respond to a user inputting a model of a target rolling mill, a steel grade, and a rolling target parameter, and acquire the rolling target parameter as the third process parameter; A first process parameter acquisition unit, adapted to acquire a first process parameter corresponding to the model of the target rolling mill from a first preset configuration file; The second process parameter acquisition unit is adapted to acquire the second process parameter of the target plate corresponding to the steel grade from a second preset configuration file.

30. The device according to claim 17, characterized in that The device also includes: A display unit, adapted to display part or all of the basic parameters and the predicted result of power consumption per ton of steel of the target plate on an interface; The export unit is adapted to export the basic parameters displayed on the display interface and the predicted result of the electricity consumption per ton of steel of the target plate in a preset manner in response to the operation of triggering the export button.

31. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the method for predicting electricity consumption per ton of steel as described in any one of claims 1 to 16 are implemented.

32. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for predicting electricity consumption per ton of steel as described in any one of claims 1 to 16 are implemented.

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