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CN115016578B - Strip steel quality regulation and control method based on edge temperature control - Google Patents

Strip steel quality regulation and control method based on edge temperature control Download PDF

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CN115016578B
CN115016578B CN202210941025.6A CN202210941025A CN115016578B CN 115016578 B CN115016578 B CN 115016578B CN 202210941025 A CN202210941025 A CN 202210941025A CN 115016578 B CN115016578 B CN 115016578B
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temperature
edge
stress
model
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CN115016578A (en
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姬亚锋
张国鹏
刘光明
李华英
刘瑜
王晓军
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Taiyuan University of Science and Technology
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
    • G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract

本发明公开了一种基于边部温度控制的带钢质量调控方法，包括：温升控制机构，风冷机构，检测机构。温升控制机构包括电磁边部加热器；风冷机构包括活塞式空气压缩机；检测机构为X射线应力检测仪；建立温度‑应力模型，运用模糊规则对现场出风喷嘴的出风量进行调节；电磁边部加热器与活塞式空气压缩机均通过信号方式连接协调控制。本发明通过电磁边部加热器与活塞式空气压缩机协调控制，获取温度均匀的带钢。建立应力‑温度增量模型，将温升模型与对流换热温降模型的温度控制与带钢应力建立一定的联系，从而保证带钢边部温度在合理的范围内，确保带钢内部应力均匀，实现整个系统的调节。

Figure 202210941025

The invention discloses a strip steel quality control method based on edge temperature control, comprising: a temperature rise control mechanism, an air cooling mechanism and a detection mechanism. The temperature rise control mechanism includes an electromagnetic edge heater; the air cooling mechanism includes a piston air compressor; the detection mechanism is an X-ray stress detector; a temperature-stress model is established, and fuzzy rules are used to adjust the air output of the on-site air outlet nozzle; Both the electromagnetic side heater and the piston air compressor are coordinated and controlled through signal connection. The invention obtains strip steel with uniform temperature through the coordinated control of the electromagnetic edge heater and the piston air compressor. Establish a stress-temperature increment model, and establish a certain relationship between the temperature control of the temperature rise model and the convective heat transfer temperature drop model and the strip stress, so as to ensure that the edge temperature of the strip is within a reasonable range and the internal stress of the strip is uniform. , to achieve the adjustment of the entire system.

Figure 202210941025

Description

一种基于边部温度控制的带钢质量调控方法A strip quality control method based on edge temperature control

技术领域technical field

本发明属于板形轧制控制技术领域，特别是涉及一种基于边部温度控制的带钢质量调控方法。The invention belongs to the technical field of flat rolling control, in particular to a strip steel quality control method based on edge temperature control.

背景技术Background technique

科学技术的进步促进了钢铁行业的迅猛发展，在带钢生产中，对于带钢板形，尺寸精度，工艺性能与力学性能有了更高的要求，所生产的高质量带钢被应用于汽车制造、航天工程、建筑和化工等各个领域，极大的促进了国民经济的发展。The advancement of science and technology has promoted the rapid development of the steel industry. In the production of strip steel, there are higher requirements for the shape, dimensional accuracy, process performance and mechanical properties of the strip steel, and the high-quality strip steel produced is used in automobile manufacturing. , aerospace engineering, construction and chemical industries, which greatly promoted the development of the national economy.

在带钢经过轧机进行轧制过程中，带钢的厚度不断减薄，由于带钢边部的散热面积相较于带钢中部的散热面积更大，因此带钢边部的温降会比带钢中部的温降更大。为解决上述问题，人们在带钢轧制过程中设置了带钢边部加热器来补偿带钢边部的温降，但在加热过程中，由传统的电磁边部加热器与水冷结合的方法将会造成冷却水溅落在带钢表面导致宽度方向两侧实际温度低于中间的现象。During the rolling process of the strip through the rolling mill, the thickness of the strip is continuously reduced. Since the heat dissipation area of the strip edge is larger than the heat dissipation area of the middle strip, the temperature drop of the strip edge will be lower than that of the strip. The temperature drop in the middle of the steel is greater. In order to solve the above problems, people set up a strip edge heater to compensate the temperature drop of the strip edge during the strip rolling process, but in the heating process, the traditional electromagnetic edge heater and water cooling method are combined. It will cause the cooling water to splash on the surface of the strip, causing the actual temperature on both sides of the width direction to be lower than the middle.

发明内容SUMMARY OF THE INVENTION

本发明的目的是提供一种基于边部温度控制的带钢质量调控方法，以解决上述现有技术存在的问题。The purpose of the present invention is to provide a strip quality control method based on edge temperature control, so as to solve the problems existing in the above-mentioned prior art.

为实现上述目的，本发明提供了一种基于边部温度控制的带钢质量调控方法，包括：In order to achieve the above object, the present invention provides a kind of strip steel quality control method based on edge temperature control, comprising:

构建温升模型，带钢经过电磁边部加热器时，测温计读取带钢边部温度值、带钢中部温度值，判断所述带钢边部温度值与所述带钢中部温度值的差值是否超过温度阈值，若所述差值超过温度阈值，则基于所述温升模型确定最终加热温度值，对所述带钢的边部进行加热，并获取加热后带钢边部温度值和加热后带钢中部温度值；Build a temperature rise model. When the strip passes through the electromagnetic edge heater, the thermometer reads the temperature value of the edge of the strip and the temperature value of the middle of the strip, and judges the temperature value of the edge of the strip and the temperature of the middle of the strip. Whether the difference exceeds the temperature threshold, if the difference exceeds the temperature threshold, the final heating temperature value is determined based on the temperature rise model, the edge of the strip is heated, and the temperature of the edge of the strip after heating is obtained. value and the temperature value in the middle of the strip after heating;

构建带钢动态温度-应力模型；Build a strip dynamic temperature-stress model;

基于所述加热后带钢边部温度值和所述加热后带钢中部温度值获取风冷机构单位时间内的出风量；Obtain the air output per unit time of the air-cooling mechanism based on the temperature value of the edge of the strip after heating and the temperature value of the middle of the strip after heating;

构建对流换热温降模型，基于所述带钢动态温度-应力模型与应力阈值，所述应力阈值根据带钢构成确定，确定轧制进程中对带钢边部的冷却量，获得温度均匀的带钢。Convective heat transfer temperature drop model is constructed, based on the dynamic temperature-stress model of the strip and the stress threshold, the stress threshold is determined according to the composition of the strip, and the amount of cooling to the edge of the strip during the rolling process is determined to obtain a uniform temperature. strip.

可选的，所述温升模型为：Optionally, the temperature rise model is:

Figure 795605DEST_PATH_IMAGE001
Figure 795605DEST_PATH_IMAGE001

式中，

Figure 447166DEST_PATH_IMAGE002
为所述最终加热温度值，
Figure 899007DEST_PATH_IMAGE003
为测温计测得的带钢中部温度值，
Figure 231899DEST_PATH_IMAGE004
为测温计测得的带钢边部温度值，
Figure 780693DEST_PATH_IMAGE005
为带钢经过后续轧制的终轧温度，
Figure 71997DEST_PATH_IMAGE006
为工艺影响系 数，
Figure 807871DEST_PATH_IMAGE006
的取值与轧制道次、每道次下压量有关，为直接测得。 In the formula,
Figure 447166DEST_PATH_IMAGE002
is the final heating temperature value,
Figure 899007DEST_PATH_IMAGE003
is the temperature value in the middle of the strip measured by the thermometer,
Figure 231899DEST_PATH_IMAGE004
is the temperature value of the strip edge measured by the thermometer,
Figure 780693DEST_PATH_IMAGE005
is the final rolling temperature of the strip after subsequent rolling,
Figure 71997DEST_PATH_IMAGE006
is the process influence coefficient,
Figure 807871DEST_PATH_IMAGE006
The value of is related to the number of rolling passes and the amount of pressing down in each pass, and is directly measured.

可选的，所述带钢动态温度-应力模型的构建过程包括：划分非等距离网格，将温度波动大的区域划分网格密度加大，按照网格划分相邻温度梯度的分布影响着轧件内部的应力状态，以增量方程表示：Optionally, the construction process of the strip dynamic temperature-stress model includes: dividing non-equidistant grids, dividing regions with large temperature fluctuations to increase the grid density, and dividing adjacent temperature gradients according to the grids that affect the distribution of temperature gradients. The stress state inside the rolling stock, expressed as an incremental equation:

Figure 475613DEST_PATH_IMAGE007
Figure 475613DEST_PATH_IMAGE007

式中，

Figure 816596DEST_PATH_IMAGE008
为当前温度下的被轧金属模量，
Figure 278801DEST_PATH_IMAGE009
为相邻网格中心距离，
Figure 501972DEST_PATH_IMAGE010
为带钢温度对应力分布影响函数的增量，
Figure 973405DEST_PATH_IMAGE011
为轧件内部应力的增量； In the formula,
Figure 816596DEST_PATH_IMAGE008
is the rolled metal modulus at the current temperature,
Figure 278801DEST_PATH_IMAGE009
is the distance between adjacent grid centers,
Figure 501972DEST_PATH_IMAGE010
is the increment of the effect function of strip temperature on stress distribution,
Figure 973405DEST_PATH_IMAGE011
is the increment of the internal stress of the rolled piece;

其中相邻网格温度对应力分布影响函数为：The influence function of adjacent grid temperature on stress distribution is:

Figure 168894DEST_PATH_IMAGE012
Figure 168894DEST_PATH_IMAGE012

式中，

Figure 67580DEST_PATH_IMAGE013
表示带钢边部与带钢中部随时间变化产生的综合应力状态，
Figure 778047DEST_PATH_IMAGE009
为相邻网格中心距离，
Figure 522012DEST_PATH_IMAGE014
为前一时刻带钢应力分布系数，
Figure 634324DEST_PATH_IMAGE015
为当前时刻带钢应 力分布系数，
Figure 438332DEST_PATH_IMAGE016
为带钢前一时刻带钢边部应力，
Figure 636095DEST_PATH_IMAGE017
为带钢前一时刻中部应力，
Figure 183751DEST_PATH_IMAGE018
为带 钢当前时刻带钢边部应力，
Figure 150570DEST_PATH_IMAGE019
为带钢当前时刻带钢中部应力，
Figure 391059DEST_PATH_IMAGE020
为带钢当前时刻中部 应力分布系数随时间的变化量，
Figure 607276DEST_PATH_IMAGE021
是带钢当前时刻边部应力分布系数随时间的变化量，
Figure 958623DEST_PATH_IMAGE022
为带钢前一时刻带钢中部应力分布系数随时间的变化量，
Figure 779949DEST_PATH_IMAGE023
是带钢前一时刻边部应 力分布系数随时间的变化量。 In the formula,
Figure 67580DEST_PATH_IMAGE013
Represents the comprehensive stress state of the edge of the strip and the middle of the strip over time,
Figure 778047DEST_PATH_IMAGE009
is the distance between adjacent grid centers,
Figure 522012DEST_PATH_IMAGE014
is the strip stress distribution coefficient at the previous moment,
Figure 634324DEST_PATH_IMAGE015
is the strip stress distribution coefficient at the current moment,
Figure 438332DEST_PATH_IMAGE016
is the strip edge stress at the previous moment of the strip,
Figure 636095DEST_PATH_IMAGE017
is the middle stress of the strip at the previous moment,
Figure 183751DEST_PATH_IMAGE018
is the strip edge stress at the current moment of the strip,
Figure 150570DEST_PATH_IMAGE019
is the stress in the middle of the strip at the current moment of the strip,
Figure 391059DEST_PATH_IMAGE020
is the time change of the stress distribution coefficient in the middle of the strip at the current moment,
Figure 607276DEST_PATH_IMAGE021
is the variation of the stress distribution coefficient at the edge of the strip with time at the current moment,
Figure 958623DEST_PATH_IMAGE022
is the variation of the stress distribution coefficient in the middle of the strip with time at the previous moment of the strip,
Figure 779949DEST_PATH_IMAGE023
is the variation of the stress distribution coefficient at the edge of the strip with time at the previous moment.

可选的，基于模糊控制原理获取所述单位时间内的出风量。Optionally, the air outlet volume per unit time is acquired based on the fuzzy control principle.

可选的，所述对流换热温降模型为：Optionally, the convective heat transfer temperature drop model is:

Figure 191339DEST_PATH_IMAGE024
Figure 191339DEST_PATH_IMAGE024

式中，

Figure 98115DEST_PATH_IMAGE025
为冷却量，
Figure 987573DEST_PATH_IMAGE026
为带钢边部温度，
Figure 928985DEST_PATH_IMAGE027
为空气的温度，
Figure 511276DEST_PATH_IMAGE028
为强迫对流热 交换系数，
Figure 905348DEST_PATH_IMAGE029
为带钢比重，
Figure 598497DEST_PATH_IMAGE030
为比热容，
Figure 863257DEST_PATH_IMAGE031
为从边部加热到风冷装置的距离，
Figure 616449DEST_PATH_IMAGE032
为带钢厚 度，
Figure 497817DEST_PATH_IMAGE033
为带钢运行速度，
Figure 994658DEST_PATH_IMAGE034
为压缩空气喷射角度修正系数。 In the formula,
Figure 98115DEST_PATH_IMAGE025
is the cooling amount,
Figure 987573DEST_PATH_IMAGE026
is the strip edge temperature,
Figure 928985DEST_PATH_IMAGE027
is the temperature of the air,
Figure 511276DEST_PATH_IMAGE028
is the forced convection heat exchange coefficient,
Figure 905348DEST_PATH_IMAGE029
is the specific gravity of the strip,
Figure 598497DEST_PATH_IMAGE030
is the specific heat capacity,
Figure 863257DEST_PATH_IMAGE031
is the distance from the edge heating to the air cooling device,
Figure 616449DEST_PATH_IMAGE032
is the strip thickness,
Figure 497817DEST_PATH_IMAGE033
is the strip running speed,
Figure 994658DEST_PATH_IMAGE034
Correction factor for the injection angle of compressed air.

可选的，所述非等距离网格的划分依据差分法的网格。Optionally, the division of the non-equidistant grid is based on the grid of the difference method.

可选的，所述非等距离网格的划分算法为：Optionally, the division algorithm of the non-equidistant grid is:

Figure 645082DEST_PATH_IMAGE035
Figure 645082DEST_PATH_IMAGE035

式中，

Figure 303596DEST_PATH_IMAGE036
表示第
Figure 672261DEST_PATH_IMAGE037
个厚度或宽度方向坐标值，
Figure 707213DEST_PATH_IMAGE038
为从1开始的正整数。In the formula,
Figure 303596DEST_PATH_IMAGE036
means the first
Figure 672261DEST_PATH_IMAGE037
a thickness or width direction coordinate value,
Figure 707213DEST_PATH_IMAGE038
is a positive integer starting from 1.

可选的，所述单位时间内的出风量的获取过程包括：定义带钢边部与带钢中部的温差与温差随时间的动态变化，建立模糊控制规则与模糊关系，基于模糊控制规则和模糊关系建立查询表，基于查询表获取模糊集合，采用最大隶属度法中最大值法对模糊集合判决，得到出风量的总控制查询表，对响应曲线进行调整，得到最终的模糊控制表，根据模糊控制表对单位时间内的出风量进行控制。Optionally, the process of obtaining the air output per unit time includes: defining the temperature difference between the edge of the strip and the middle of the strip and the dynamic change of the temperature difference with time, establishing a fuzzy control rule and a fuzzy relationship, and based on the fuzzy control rule and fuzzy relationship. The query table is established based on the query table, the fuzzy set is obtained based on the query table, the fuzzy set is judged by the maximum value method in the maximum membership degree method, and the total control query table of the air output is obtained, and the response curve is adjusted to obtain the final fuzzy control table. The control table controls the air volume per unit time.

可选的，所述温度阈值为30摄氏度。Optionally, the temperature threshold is 30 degrees Celsius.

本发明的技术效果为：The technical effect of the present invention is:

本发明通过电磁边部加热器与活塞式空气压缩机协调控制，获取温度均匀的带钢。本文还建立应力-温度增量模型，将上述温升模型与对流换热温降模型的温度控制与带钢应力建立一定的联系，从而保证带钢边部温度在合理的范围内；确保带钢内部应力均匀，实现整个系统的调节。The invention obtains strip steel with uniform temperature through the coordinated control of the electromagnetic edge heater and the piston air compressor. This paper also establishes a stress-temperature increment model, and establishes a certain connection between the temperature control of the above-mentioned temperature rise model and convective heat transfer temperature drop model and the strip stress, so as to ensure that the edge temperature of the strip is within a reasonable range; The internal stress is uniform, and the adjustment of the whole system is realized.

附图说明Description of drawings

构成本申请的一部分的附图用来提供对本申请的进一步理解，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：The accompanying drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the attached image:

图1为本发明实施例中的立体结构示意图；1 is a schematic diagram of a three-dimensional structure in an embodiment of the present invention;

图2为本发明实施例中的工作流程图。FIG. 2 is a working flowchart in an embodiment of the present invention.

附图标记：1为输送辊，2为带钢中部测温探头，3为被研究对象（带钢），4为出风喷嘴，5为电磁边部加热器，6为电磁线圈，7为活塞式空气压缩机，8为带钢边部测温探头，9为控制柜。Reference signs: 1 is the conveying roller, 2 is the temperature measuring probe in the middle of the strip, 3 is the research object (strip), 4 is the air outlet nozzle, 5 is the electromagnetic edge heater, 6 is the electromagnetic coil, and 7 is the piston type air compressor, 8 is the temperature probe at the edge of the strip, and 9 is the control cabinet.

具体实施方式Detailed ways

需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本申请。It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

需要说明的是，在附图的流程图示出的步骤可以在诸如一组计算机可执行指令的计算机系统中执行，并且，虽然在流程图中示出了逻辑顺序，但是在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤。It should be noted that the steps shown in the flowcharts of the accompanying drawings may be executed in a computer system, such as a set of computer-executable instructions, and, although a logical sequence is shown in the flowcharts, in some cases, Steps shown or described may be performed in an order different from that herein.

实施例一Example 1

如图1-2所示，本实施例中提供一种基于边部温度控制的带钢质量调控方法，包括：As shown in Figure 1-2, the present embodiment provides a method for controlling the quality of strip steel based on edge temperature control, including:

构建温升模型，带钢经过电磁边部加热器时，测温计读取带钢边部温度值、带钢中部温度值，判断带钢边部温度值与带钢中部温度值的差值是否超过温度阈值，若差值超过温度阈值，则基于温升模型确定最终加热温度值，对带钢的边部进行加热，并获取加热后带钢边部温度值和加热后带钢中部温度值；Build a temperature rise model. When the strip passes through the electromagnetic edge heater, the thermometer reads the temperature value of the edge of the strip and the temperature value of the middle of the strip, and judges whether the difference between the temperature value of the edge of the strip and the temperature value of the middle of the strip is not. If the temperature threshold is exceeded, if the difference exceeds the temperature threshold, the final heating temperature value is determined based on the temperature rise model, the edge of the strip is heated, and the temperature value of the edge of the strip after heating and the temperature value of the middle of the strip after heating are obtained;

构建带钢动态温度-应力模型；Build a strip dynamic temperature-stress model;

基于加热后带钢边部温度值和加热后带钢中部温度值获取风冷机构单位时间内的出风量；Obtain the air output per unit time of the air cooling mechanism based on the temperature value of the edge of the strip after heating and the temperature value of the middle of the strip after heating;

构建对流换热温降模型，基于带钢动态温度-应力模型与应力阈值，确定轧制进程中对带钢边部的冷却量，获得温度均匀的带钢。A convective heat transfer temperature drop model was constructed, and based on the dynamic temperature-stress model of the strip and the stress threshold, the cooling amount to the edge of the strip during the rolling process was determined to obtain a strip with uniform temperature.

基于带钢动态温度-应力模型计算带钢边部温度值与带钢中部温度值的差值对应的内部应力，计算加热后带钢边部温度值和加热后带钢中部温度值的差值对应的内部应力，保证内部应力不超过应力阈值。Based on the dynamic temperature-stress model of the strip, calculate the internal stress corresponding to the difference between the temperature value at the edge of the strip and the temperature value in the middle of the strip, and calculate the corresponding difference between the temperature value at the edge of the strip after heating and the temperature value in the middle of the strip after heating. The internal stress ensures that the internal stress does not exceed the stress threshold.

在一些实施例中，温升模型为：In some embodiments, the temperature rise model is:

Figure 477723DEST_PATH_IMAGE001
Figure 477723DEST_PATH_IMAGE001

式中，

Figure 307139DEST_PATH_IMAGE002
为最终加热温度值，
Figure 163099DEST_PATH_IMAGE003
为测温计测得的带钢中部温度值，
Figure 1742DEST_PATH_IMAGE004
为测 温计测得的带钢边部温度值，
Figure 361179DEST_PATH_IMAGE005
为带钢经过后续轧制的终轧温度，
Figure 627076DEST_PATH_IMAGE006
为工艺影响系数，
Figure 501491DEST_PATH_IMAGE006
的取值与轧制道次、每道次下压量有关，为直接测得。 In the formula,
Figure 307139DEST_PATH_IMAGE002
is the final heating temperature value,
Figure 163099DEST_PATH_IMAGE003
is the temperature value in the middle of the strip measured by the thermometer,
Figure 1742DEST_PATH_IMAGE004
is the temperature value of the strip edge measured by the thermometer,
Figure 361179DEST_PATH_IMAGE005
is the final rolling temperature of the strip after subsequent rolling,
Figure 627076DEST_PATH_IMAGE006
is the process influence coefficient,
Figure 501491DEST_PATH_IMAGE006
The value of is related to the number of rolling passes and the amount of pressing down in each pass, and is directly measured.

在一些实施例中，单位时间内的出风量通过模糊控制原理获得。In some embodiments, the air outlet volume per unit time is obtained through the fuzzy control principle.

在一些实施例中，温度阈值为30摄氏度。In some embodiments, the temperature threshold is 30 degrees Celsius.

实施例二Embodiment 2

如图1-2所示，本实施例中提供一种基于边部温度控制的带钢质量调控方法，包括：As shown in Figure 1-2, the present embodiment provides a method for controlling the quality of strip steel based on edge temperature control, including:

本实施例提供一种基于张力-温度控制的板形调控模型及装置，所研究的带钢3由输送辊1经过电磁边部加热器5加热后运送到测温探头2和测温探头8，对加热后的温度进行读取，将读取的数值通过信号系统与风冷系统的对流换热模型计算后经过活塞式空气压缩机7时由喷嘴4喷出压缩空气对边部进行冷却，9控制柜为操作人员可视界面用于监控各个环节的参数。This embodiment provides a plate shape control model and device based on tension-temperature control. The strip steel 3 under study is heated by the conveying roller 1 through the electromagnetic edge heater 5 and then transported to the temperature measuring probe 2 and the temperature measuring probe 8, The temperature after heating is read, and the read value is calculated by the convection heat exchange model between the signal system and the air-cooling system. When passing through the piston air compressor 7, the compressed air is sprayed from the nozzle 4 to cool the edge. 9 The control cabinet is a visual interface for the operator to monitor the parameters of each link.

本发明通过电磁边部加热器与活塞式空气压缩机协调控制，获取温度均匀的带钢。本文还建立应力-温度增量模型，将上述温升模型与对流换热温降模型的温度控制与带钢应力建立一定的联系，从而保证带钢边部温度在合理的范围内；确保带钢内部应力均匀，实现整个系统的调节。The invention obtains strip steel with uniform temperature through the coordinated control of the electromagnetic edge heater and the piston air compressor. This paper also establishes a stress-temperature increment model, and establishes a certain connection between the temperature control of the above-mentioned temperature rise model and convective heat transfer temperature drop model and the strip stress, so as to ensure that the temperature of the strip edge is within a reasonable range; The internal stress is uniform, and the adjustment of the whole system is realized.

建立基于温度-应力增量方程：Establish a temperature-stress increment equation based on:

以差分法的网格划分非等距离网格，将温度波动大的区域划分网格密度加大，非等距网格的划分算法为：The non-equidistant grid is divided by the grid of the difference method, and the grid density is increased in the area with large temperature fluctuation. The non-equidistant grid division algorithm is:

Figure 143825DEST_PATH_IMAGE035
Figure 143825DEST_PATH_IMAGE035

按照网格划分相邻温度梯度的分布影响着轧件内部的应力状态，以增量方程表示：The distribution of adjacent temperature gradients according to the meshing affects the stress state inside the rolling stock, which is expressed by the incremental equation:

Figure 623347DEST_PATH_IMAGE039
Figure 623347DEST_PATH_IMAGE039

式中，

Figure 60145DEST_PATH_IMAGE008
为当前温度下的被轧金属模量，
Figure 828381DEST_PATH_IMAGE009
为相邻网格中心距离，
Figure 805564DEST_PATH_IMAGE040
为带钢温度对应力分布影响函数的增量。 In the formula,
Figure 60145DEST_PATH_IMAGE008
is the rolled metal modulus at the current temperature,
Figure 828381DEST_PATH_IMAGE009
is the distance between adjacent grid centers,
Figure 805564DEST_PATH_IMAGE040
is the increment of the effect function of strip temperature on stress distribution.

其中相邻网格温度对应力分布影响函数为：The influence function of adjacent grid temperature on stress distribution is:

Figure 139594DEST_PATH_IMAGE041
Figure 139594DEST_PATH_IMAGE041

式中，

Figure 747292DEST_PATH_IMAGE009
为相邻网格中心距离，
Figure 799562DEST_PATH_IMAGE014
为前一时刻带钢应力分布系数，
Figure 518119DEST_PATH_IMAGE015
为 当前时刻带钢应力分布系数，
Figure 972234DEST_PATH_IMAGE016
为带钢前一时刻带钢边部应力，
Figure 750835DEST_PATH_IMAGE017
为带钢前一时刻中 部应力，
Figure 290400DEST_PATH_IMAGE018
为带钢当前时刻带钢边部应力，
Figure 812649DEST_PATH_IMAGE019
为带钢当前时刻带钢中部张力。 In the formula,
Figure 747292DEST_PATH_IMAGE009
is the distance between adjacent grid centers,
Figure 799562DEST_PATH_IMAGE014
is the strip stress distribution coefficient at the previous moment,
Figure 518119DEST_PATH_IMAGE015
is the strip stress distribution coefficient at the current moment,
Figure 972234DEST_PATH_IMAGE016
is the strip edge stress at the previous moment of the strip,
Figure 750835DEST_PATH_IMAGE017
is the middle stress of the strip at the previous moment,
Figure 290400DEST_PATH_IMAGE018
is the strip edge stress at the current moment of the strip,
Figure 812649DEST_PATH_IMAGE019
It is the tension in the middle of the strip at the current moment of the strip.

经过现场统计带钢边部与带钢中部温度差值对板形的影响，确定在接下来轧制进程中对带钢边部的冷却量，实现对带钢边部温度的精确控制。Through the on-site statistics of the influence of the temperature difference between the strip edge and the strip center on the shape of the strip, the cooling amount of the strip edge in the next rolling process is determined, and the precise control of the strip edge temperature is realized.

综合研究结果，可得出带钢边部与压缩空气对流换热的温降为：Based on the comprehensive research results, it can be concluded that the temperature drop of the convective heat transfer between the edge of the strip and the compressed air is:

Figure 855691DEST_PATH_IMAGE042
Figure 855691DEST_PATH_IMAGE042

式中，

Figure 70772DEST_PATH_IMAGE004
为带钢边部温度，
Figure 832054DEST_PATH_IMAGE028
为强迫对流热交换系数，
Figure 157993DEST_PATH_IMAGE029
为带钢比重，
Figure 55542DEST_PATH_IMAGE030
为比 热容，
Figure 175945DEST_PATH_IMAGE031
为从边部加热到风冷装置的距离，
Figure 690103DEST_PATH_IMAGE032
为带钢厚度，
Figure 554154DEST_PATH_IMAGE033
为带钢运行速度，
Figure 571788DEST_PATH_IMAGE034
为压缩 空气喷射角度修正系数。 In the formula,
Figure 70772DEST_PATH_IMAGE004
is the strip edge temperature,
Figure 832054DEST_PATH_IMAGE028
is the forced convection heat exchange coefficient,
Figure 157993DEST_PATH_IMAGE029
is the specific gravity of the strip,
Figure 55542DEST_PATH_IMAGE030
is the specific heat capacity,
Figure 175945DEST_PATH_IMAGE031
is the distance from the edge heating to the air cooling device,
Figure 690103DEST_PATH_IMAGE032
is the strip thickness,
Figure 554154DEST_PATH_IMAGE033
is the strip running speed,
Figure 571788DEST_PATH_IMAGE034
Correction factor for the injection angle of compressed air.

模糊推理定义带钢边部与带钢中部的温差与温差随时间动态变化，根据两者综合计算出风喷嘴的单位时间出风量。Fuzzy reasoning defines the temperature difference between the edge of the strip and the middle of the strip and the temperature difference changes dynamically with time, and the air output per unit time of the air nozzle is comprehensively calculated according to the two.

模糊控制规则如表1所示。The fuzzy control rules are shown in Table 1.

Figure 128672DEST_PATH_IMAGE043
Figure 128672DEST_PATH_IMAGE043

模糊关系为：The fuzzy relationship is:

Figure 864546DEST_PATH_IMAGE044
Figure 864546DEST_PATH_IMAGE044

总的模糊关系为

Figure 532288DEST_PATH_IMAGE045
，其中
Figure 404429DEST_PATH_IMAGE046
表示第
Figure 132214DEST_PATH_IMAGE047
个模糊矩阵。当 偏差、偏差变化分别去模糊集E和EC时，输出的控制量的变化U根据模糊推理运算
Figure 355385DEST_PATH_IMAGE048
，计算E,EC所有分档，从小到大排序为
Figure 561238DEST_PATH_IMAGE049
，根 据分档确定单位时间的出风量，O代表喷嘴关闭，PB代表所有冷却喷嘴单位时间出风量最 大。 The total fuzzy relation is
Figure 532288DEST_PATH_IMAGE045
,in
Figure 404429DEST_PATH_IMAGE046
means the first
Figure 132214DEST_PATH_IMAGE047
a fuzzy matrix. When the deviation and deviation change are de-fuzzy sets E and EC respectively, the change U of the output control quantity is calculated according to the fuzzy inference
Figure 355385DEST_PATH_IMAGE048
, calculate all the bins of E and EC, and sort them from small to large as
Figure 561238DEST_PATH_IMAGE049
, according to the classification to determine the air volume per unit time, O means the nozzle is closed, PB means the maximum air volume per unit time of all cooling nozzles.

建立查询表，计算E,EC论域中所有分档组合对应的模糊集合，即：A look-up table is established to calculate the fuzzy sets corresponding to all bin combinations in the E and EC universes, namely:

Figure 553465DEST_PATH_IMAGE050
Figure 553465DEST_PATH_IMAGE050

采用最大隶属度法中最大值法对输出模糊集合判决，得到出风量的总控制查询表，再通过Matlab仿真对相应曲线进行调整。得到最终的模糊控制表，将表存在计算机中，用查表法进行控制。The maximum value method in the maximum membership degree method is used to judge the output fuzzy set, and the total control look-up table of the air output is obtained, and then the corresponding curve is adjusted through Matlab simulation. Get the final fuzzy control table, store the table in the computer, and use the table lookup method to control.

在实际控制时，将带钢边部温度与预设的调整温度进行比较得到偏差

Figure 452151DEST_PATH_IMAGE051
，计算 得出的偏差变化率
Figure 897039DEST_PATH_IMAGE052
，经过量化处理，变成查询表中所需的
Figure 703321DEST_PATH_IMAGE053
和
Figure 815633DEST_PATH_IMAGE054
值，再与 查询表中数据进行比较，得到所需的控制量的量化值
Figure 619641DEST_PATH_IMAGE055
，
Figure 817404DEST_PATH_IMAGE055
再乘以比例因子
Figure 341623DEST_PATH_IMAGE056
即 可得到全部的出风量。 In the actual control, the deviation of the strip edge temperature is compared with the preset adjustment temperature
Figure 452151DEST_PATH_IMAGE051
, the calculated deviation rate of change
Figure 897039DEST_PATH_IMAGE052
, after quantification, becomes the required in the look-up table
Figure 703321DEST_PATH_IMAGE053
and
Figure 815633DEST_PATH_IMAGE054
value, and then compare it with the data in the look-up table to obtain the quantified value of the required control quantity
Figure 619641DEST_PATH_IMAGE055
,
Figure 817404DEST_PATH_IMAGE055
Multiply by the scale factor
Figure 341623DEST_PATH_IMAGE056
You can get all the air output.

所研究的板形情况可由X2350A型应力测定仪观察，测定仪通过离线测量带钢内的残余应力来确定所研究带钢的板形情况。The shape of the studied strip can be observed by the X2350A stress tester, which determines the shape of the strip under study by measuring the residual stress in the strip off-line.

最终找到合适带钢边部与带钢中部温差阈值，实现良好的板形控制。本发明综合考虑应力与温度对带钢的影响，实现应力-温度板形综合控制系统的模型化设定，有效提高带钢板形质量。Finally, a suitable temperature difference threshold between the edge of the strip and the middle of the strip is found to achieve good shape control. The invention comprehensively considers the influence of stress and temperature on the strip steel, realizes the modeling setting of the stress-temperature shape comprehensive control system, and effectively improves the shape quality of the strip steel.

以上所述，仅为本申请较佳的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应该以权利要求的保护范围为准。The above are only the preferred specific embodiments of the present application, but the protection scope of the present application is not limited to this. Substitutions should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (5)

1.一种基于边部温度控制的带钢质量调控方法，其特征在于，包括以下步骤：1. a strip quality control method based on edge temperature control, is characterized in that, comprises the following steps: 构建温升模型，带钢经过电磁边部加热器时，测温计读取带钢边部温度值、带钢中部温度值，判断所述带钢边部温度值与所述带钢中部温度值的差值是否超过温度阈值，若所述差值超过温度阈值，则基于所述温升模型确定最终加热温度值，对所述带钢的边部进行加热，并获取加热后带钢边部温度值和加热后带钢中部温度值；Build a temperature rise model. When the strip passes through the electromagnetic edge heater, the thermometer reads the temperature value of the edge of the strip and the temperature value of the middle of the strip, and judges the temperature value of the edge of the strip and the temperature of the middle of the strip. Whether the difference exceeds the temperature threshold, if the difference exceeds the temperature threshold, the final heating temperature value is determined based on the temperature rise model, the edge of the strip is heated, and the temperature of the edge of the strip after heating is obtained. value and the temperature value in the middle of the strip after heating; 构建带钢动态温度-应力模型；Build a strip dynamic temperature-stress model; 基于所述加热后带钢边部温度值和所述加热后带钢中部温度值获取风冷机构单位时间内的出风量；Obtain the air output per unit time of the air-cooling mechanism based on the temperature value of the edge of the strip after heating and the temperature value of the middle of the strip after heating; 构建对流换热温降模型，基于所述对流换热温降模型、所述带钢动态温度-应力模型及应力阈值，得到后续轧制进程中对带钢边部的冷却量，基于所述冷却量控制带钢温度，获得应力均匀的带钢，其中，所述应力阈值根据带钢构成确定；Constructing a convective heat transfer temperature drop model, based on the convective heat transfer temperature drop model, the strip dynamic temperature-stress model and the stress threshold, the cooling amount to the strip edge in the subsequent rolling process is obtained, based on the cooling The temperature of the strip steel is quantitatively controlled to obtain a strip steel with uniform stress, wherein the stress threshold is determined according to the composition of the strip steel; 所述温升模型为：The temperature rise model is:
Figure 944832DEST_PATH_IMAGE001
Figure 944832DEST_PATH_IMAGE001
 式中，
Figure 150685DEST_PATH_IMAGE002
为所述最终加热温度值，
Figure 142912DEST_PATH_IMAGE003
为测温计测得的带钢中部温度值，
Figure 41598DEST_PATH_IMAGE004
为测温 计测得的带钢边部温度值，
Figure 486486DEST_PATH_IMAGE005
为带钢经过后续轧制的终轧温度，
Figure 496030DEST_PATH_IMAGE006
为工艺影响系数，
Figure 608342DEST_PATH_IMAGE006
的 取值与轧制道次、每道次下压量有关，为直接测得； In the formula,
Figure 150685DEST_PATH_IMAGE002
is the final heating temperature value,
Figure 142912DEST_PATH_IMAGE003
is the temperature value in the middle of the strip measured by the thermometer,
Figure 41598DEST_PATH_IMAGE004
is the temperature value of the strip edge measured by the thermometer,
Figure 486486DEST_PATH_IMAGE005
is the final rolling temperature of the strip after subsequent rolling,
Figure 496030DEST_PATH_IMAGE006
is the process influence coefficient,
Figure 608342DEST_PATH_IMAGE006
The value of is related to the rolling pass and the amount of pressing down in each pass, which is directly measured; 所述带钢动态温度-应力模型的构建过程包括：划分非等距离网格，将温度波动大的区域划分网格密度加大，按照网格划分相邻温度梯度的分布影响着轧件内部的应力状态，以增量方程表示：The construction process of the strip dynamic temperature-stress model includes: dividing non-equidistant grids, dividing areas with large temperature fluctuations to increase the grid density, and dividing adjacent temperature gradients according to grids. Stress state, expressed as an incremental equation:
Figure 677930DEST_PATH_IMAGE007
Figure 677930DEST_PATH_IMAGE007
 式中，
Figure 875693DEST_PATH_IMAGE008
为当前温度下的被轧金属模量，
Figure 423349DEST_PATH_IMAGE009
为相邻网格中心距离，
Figure 390168DEST_PATH_IMAGE010
为 带钢温度对应力分布影响函数的增量，
Figure 365077DEST_PATH_IMAGE011
为轧件内部应力的增量； In the formula,
Figure 875693DEST_PATH_IMAGE008
is the rolled metal modulus at the current temperature,
Figure 423349DEST_PATH_IMAGE009
is the distance between adjacent grid centers,
Figure 390168DEST_PATH_IMAGE010
is the increment of the effect function of strip temperature on stress distribution,
Figure 365077DEST_PATH_IMAGE011
is the increment of the internal stress of the rolled piece; 其中相邻网格温度对应力分布影响函数为：The influence function of adjacent grid temperature on stress distribution is:
Figure 253398DEST_PATH_IMAGE012
Figure 253398DEST_PATH_IMAGE012
 式中，
Figure 604745DEST_PATH_IMAGE013
表示带钢边部与带钢中部随时间变化产生的综合应力状态，
Figure 426071DEST_PATH_IMAGE009
为相 邻网格中心距离，
Figure 837461DEST_PATH_IMAGE014
为前一时刻带钢应力分布系数，
Figure 744237DEST_PATH_IMAGE015
为当前时刻带钢应力分布 系数，
Figure 633695DEST_PATH_IMAGE016
为带钢前一时刻带钢边部应力，
Figure 575107DEST_PATH_IMAGE017
为带钢前一时刻中部应力，
Figure 891818DEST_PATH_IMAGE018
为带钢当前时 刻带钢边部应力，
Figure 285891DEST_PATH_IMAGE019
为带钢当前时刻带钢中部应力，
Figure 979040DEST_PATH_IMAGE020
为带钢当前时刻中部应力分布 系数随时间的变化量，
Figure 769098DEST_PATH_IMAGE021
是带钢当前时刻边部应力分布系数随时间的变化量，
Figure 522291DEST_PATH_IMAGE022
为带 钢前一时刻带钢中部应力分布系数随时间的变化量，
Figure 403659DEST_PATH_IMAGE023
是带钢前一时刻边部应力分布系 数随时间的变化量； In the formula,
Figure 604745DEST_PATH_IMAGE013
Represents the comprehensive stress state of the edge of the strip and the middle of the strip over time,
Figure 426071DEST_PATH_IMAGE009
is the distance between adjacent grid centers,
Figure 837461DEST_PATH_IMAGE014
is the strip stress distribution coefficient at the previous moment,
Figure 744237DEST_PATH_IMAGE015
is the strip stress distribution coefficient at the current moment,
Figure 633695DEST_PATH_IMAGE016
is the strip edge stress at the previous moment of the strip,
Figure 575107DEST_PATH_IMAGE017
is the middle stress of the strip at the previous moment,
Figure 891818DEST_PATH_IMAGE018
is the strip edge stress at the current moment of the strip,
Figure 285891DEST_PATH_IMAGE019
is the stress in the middle of the strip at the current moment of the strip,
Figure 979040DEST_PATH_IMAGE020
is the time change of the stress distribution coefficient in the middle of the strip at the current moment,
Figure 769098DEST_PATH_IMAGE021
is the variation of the stress distribution coefficient at the edge of the strip with time at the current moment,
Figure 522291DEST_PATH_IMAGE022
is the variation of the stress distribution coefficient in the middle of the strip with time at the previous moment of the strip,
Figure 403659DEST_PATH_IMAGE023
is the variation of the edge stress distribution coefficient with time at the previous moment of the strip; 基于模糊控制原理获取所述单位时间内的出风量；Based on the fuzzy control principle, the air output volume per unit time is obtained; 所述对流换热温降模型为：The convective heat transfer temperature drop model is:
Figure 634920DEST_PATH_IMAGE024
Figure 634920DEST_PATH_IMAGE024
 式中，
Figure 285345DEST_PATH_IMAGE025
为冷却量，
Figure 209438DEST_PATH_IMAGE004
为带钢边部温度，
Figure 843682DEST_PATH_IMAGE026
为空气的温度，
Figure 878634DEST_PATH_IMAGE027
为强迫对流热交换系 数，
Figure 383565DEST_PATH_IMAGE028
为带钢比重，
Figure 478560DEST_PATH_IMAGE029
为比热容，
Figure 334520DEST_PATH_IMAGE030
为从边部加热到风冷装置的距离，
Figure 907584DEST_PATH_IMAGE031
为带钢厚度，
Figure 532600DEST_PATH_IMAGE032
为带 钢运行速度，
Figure 798497DEST_PATH_IMAGE033
为压缩空气喷射角度修正系数。 In the formula,
Figure 285345DEST_PATH_IMAGE025
is the cooling amount,
Figure 209438DEST_PATH_IMAGE004
is the strip edge temperature,
Figure 843682DEST_PATH_IMAGE026
is the temperature of the air,
Figure 878634DEST_PATH_IMAGE027
is the forced convection heat exchange coefficient,
Figure 383565DEST_PATH_IMAGE028
is the specific gravity of the strip,
Figure 478560DEST_PATH_IMAGE029
is the specific heat capacity,
Figure 334520DEST_PATH_IMAGE030
is the distance from the edge heating to the air cooling device,
Figure 907584DEST_PATH_IMAGE031
is the strip thickness,
Figure 532600DEST_PATH_IMAGE032
is the strip running speed,
Figure 798497DEST_PATH_IMAGE033
Correction factor for the injection angle of compressed air. 2.根据权利要求1所述的基于边部温度控制的带钢质量调控方法，其特征在于，所述非等距离网格的划分依据差分法的网格。2 . The strip quality control method based on edge temperature control according to claim 1 , wherein the division of the non-equidistant grid is based on the grid of the difference method. 3 . 3.根据权利要求1所述的基于边部温度控制的带钢质量调控方法，其特征在于，所述非等距离网格的划分算法为：3. the strip quality control method based on edge temperature control according to claim 1, is characterized in that, the division algorithm of described non-equidistant grid is:
Figure DEST_PATH_IMAGE034
Figure DEST_PATH_IMAGE034
 式中，
Figure DEST_PATH_IMAGE035
表示第
Figure DEST_PATH_IMAGE036
个厚度或宽度方向坐标值，
Figure DEST_PATH_IMAGE037
为从1开始的正整数。In the formula,
Figure DEST_PATH_IMAGE035
means the first
Figure DEST_PATH_IMAGE036
a thickness or width direction coordinate value,
Figure DEST_PATH_IMAGE037
is a positive integer starting from 1. 4.根据权利要求1所述的基于边部温度控制的带钢质量调控方法，其特征在于，所述单位时间内的出风量的获取过程包括：定义带钢边部与带钢中部的温差与温差随时间的动态变化，建立模糊控制规则与模糊关系，基于模糊控制规则和模糊关系建立查询表，基于查询表获取模糊集合，采用最大隶属度法中最大值法对模糊集合判决，得到出风量的总控制查询表，对响应曲线进行调整，得到最终的模糊控制表，根据模糊控制表对单位时间内的出风量进行控制。4. the strip quality control method based on edge temperature control according to claim 1, is characterized in that, the acquisition process of the air outlet volume in described unit time comprises: the temperature difference of defining strip edge and strip middle and The dynamic change of temperature difference with time, establish fuzzy control rules and fuzzy relationship, establish a look-up table based on fuzzy control rules and fuzzy relationship, obtain fuzzy set based on look-up table, use the maximum value method in the maximum membership method to judge the fuzzy set, and obtain the air volume The total control look-up table is obtained, the response curve is adjusted, and the final fuzzy control table is obtained, and the air volume per unit time is controlled according to the fuzzy control table. 5.根据权利要求1所述的基于边部温度控制的带钢质量调控方法，其特征在于，所述温度阈值为30摄氏度。5 . The strip quality control method based on edge temperature control according to claim 1 , wherein the temperature threshold is 30 degrees Celsius. 6 .
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