CN115283452A - A kind of production control method of hot rolled variable thickness strip - Google Patents
A kind of production control method of hot rolled variable thickness strip Download PDFInfo
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- 238000000195 production control method Methods 0.000 title claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 95
- 239000010959 steel Substances 0.000 claims abstract description 95
- 230000008859 change Effects 0.000 claims abstract description 84
- 230000008719 thickening Effects 0.000 claims abstract description 55
- 238000005096 rolling process Methods 0.000 claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000005098 hot rolling Methods 0.000 claims abstract description 11
- 230000036962 time dependent Effects 0.000 claims description 6
- 238000009966 trimming Methods 0.000 claims description 6
- 230000001960 triggered effect Effects 0.000 claims 2
- 238000005520 cutting process Methods 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
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Abstract
本申请的实施例提供了一种热轧变厚度带钢的生产控制方法，所述方法包括：根据热连轧带钢的产品需求，设定带钢的厚度变化参数，所述厚度变化参数用于表征带钢生产过程中的厚度变化情况；获取带钢生产参数，所述带钢生产参数包括中间坯参数、切头量、切尾量、成品带钢厚度以及实时轧制速度；基于所述厚度变化参数以及所述带钢生产参数，确定所述带钢在变厚段的随时间厚度变化速率；在触发针对所述带钢的变厚连轧信号后，根据所述随时间厚度变化速率进行变厚度热连轧。本申请实施例的技术方案能够在不增加任何硬件产品和投资的情况下生产变厚度带钢。
An embodiment of the present application provides a method for controlling the production of hot-rolled strip with variable thickness, the method comprising: setting a thickness variation parameter of the strip according to product requirements of the hot-rolled strip, wherein the thickness variation parameter is determined by using It is used to characterize the thickness change in the strip steel production process; obtain the strip steel production parameters, the strip steel production parameters include the intermediate billet parameters, the cutting head amount, the cutting tail amount, the finished strip steel thickness and the real-time rolling speed; based on the The thickness change parameter and the strip production parameter are used to determine the time thickness change rate of the strip in the thickening section; after triggering the thickening continuous rolling signal for the strip, according to the time thickness change rate Perform variable thickness hot rolling. The technical solutions of the embodiments of the present application can produce variable-thickness strip steel without adding any hardware products and investment.
Description
技术领域technical field
本申请涉及热连轧技术领域，具体而言，涉及一种热轧变厚度带钢的生产控制方法。The present application relates to the technical field of continuous hot rolling, in particular to a production control method of hot-rolled variable-thickness steel strips.
背景技术Background technique
随着变壁厚连续油管的市场需求日益增长，原有产线无法满足变厚度带钢的生产，而重新进行产线设计或者产线改造所需成本过于庞大，严重制约变壁厚连续油管产业的发展。With the increasing market demand for variable-wall-thickness coiled tubing, the original production line cannot meet the production of variable-thickness strip steel, and the cost of redesigning or revamping the production line is too large, which seriously restricts the variable-wall-thickness coiled tubing industry development of.
基于此，本领域技术人员急需一种热轧变厚度带钢的生产控制方法，能够在不增加任何硬件产品和投资的情况下生产变厚度带钢。Based on this, those skilled in the art urgently need a production control method for hot-rolled variable-thickness steel strips, which can produce variable-thickness steel strips without adding any hardware products and investment.
发明内容Contents of the invention
本申请的实施例提供了种热轧变厚度带钢的生产控制方法，进而至少在一定程度能够在不增加任何硬件产品和投资的情况下生产变厚度带钢。The embodiments of the present application provide a production control method for hot-rolled variable-thickness steel strips, so that variable-thickness steel strips can be produced at least to a certain extent without adding any hardware products and investment.
本申请的其他特性和优点将通过下面的详细描述变得显然，或部分地通过本申请的实践而习得。Other features and advantages of the present application will become apparent from the following detailed description, or in part, be learned by practice of the present application.
根据本申请实施例的一个方面，提供了一种热轧变厚度带钢的生产控制方法，所述方法包括：根据热连轧带钢的产品需求，设定带钢的厚度变化参数，所述厚度变化参数用于表征带钢生产过程中的厚度变化情况；获取带钢生产参数，所述带钢生产参数包括中间坯参数、切头量、切尾量、成品带钢厚度以及实时轧制速度；基于所述厚度变化参数以及所述带钢生产参数，确定所述带钢在变厚段的随时间厚度变化速率；在触发针对所述带钢的变厚连轧信号后，根据所述随时间厚度变化速率进行变厚度热连轧。According to an aspect of the embodiment of the present application, a production control method of hot-rolled variable-thickness steel strip is provided, the method includes: setting the thickness variation parameters of the strip according to the product demand of hot-rolled strip steel, the said The thickness change parameter is used to characterize the thickness change in the strip steel production process; obtain the strip steel production parameters, the strip steel production parameters include intermediate billet parameters, trimming amount, trimming amount, finished strip thickness and real-time rolling speed ; Based on the thickness change parameter and the strip steel production parameter, determine the thickness change rate of the strip steel in the thickening section with time; after triggering the thickening continuous rolling signal for the strip steel, according to the Time thickness change rate for variable thickness hot rolling.
在本申请的一些实施例中，所述厚度变化参数包括：头部和尾部厚度变化量、厚度平直段头部长度以及厚度平直段尾部长度。In some embodiments of the present application, the thickness variation parameters include: head and tail thickness variation, head length of the straight thickness section, and tail length of the straight thickness section.
在本申请的一些实施例中，所述基于所述厚度变化参数以及所述带钢生产参数，确定所述带钢在变厚段的随时间厚度变化速率，包括：基于所述厚度变化参数以及所述带钢生产参数，确定所述带钢的预测成品长度；基于所述厚度变化参数以及所述预测成品长度，计算所述带钢在变厚段的随时间厚度变化速率。In some embodiments of the present application, the determining the rate of thickness change over time of the strip in the thickening section based on the thickness change parameter and the strip steel production parameter includes: based on the thickness change parameter and the The strip steel production parameters determine the predicted finished product length of the strip steel; based on the thickness change parameters and the predicted finished product length, calculate the time-dependent thickness change rate of the strip steel in the thickening section.
在本申请的一些实施例中，基于前述方案，所述基于所述厚度变化参数以及所述带钢生产参数，确定所述带钢的预测成品长度，包括：In some embodiments of the present application, based on the foregoing solution, the determination of the predicted finished length of the strip based on the thickness variation parameter and the strip production parameter includes:
按照以下公式计算所述带钢的预测成品长度：The predicted finished length of the strip is calculated according to the following formula:
其中，L2为所述带钢的预测成品长度，l1为所述厚度平直段头部长度，l2为所述厚度平直段尾部长度，L1为所述带钢的中间坯长度，h2为所述成品带钢厚度，h1为中间坯厚度，x为所述切头量，y为所述切尾量，Δh为所述头部和尾部厚度变化量。Wherein, L 2 is the predicted finished product length of the strip steel, l 1 is the head length of the straight section of the thickness, l 2 is the tail length of the straight section of the thickness, and L 1 is the intermediate billet length of the strip steel , h 2 is the thickness of the finished strip, h 1 is the thickness of the intermediate slab, x is the amount of the cut head, y is the amount of the tail cut, and Δh is the change in the thickness of the head and tail.
在本申请的一些实施例中，基于前述方案，所述基于所述厚度变化参数以及所述预测成品长度，计算所述带钢在变厚段的随时间厚度变化速率，包括：基于所述头部和尾部厚度变化量、所述厚度平直段头部长度、所述厚度平直段尾部长度以及所述预测成品长度，计算所述带钢在变厚段随长度的厚度变化率；基于所述带钢在变厚段随长度的厚度变化率以及实时轧制速度，计算所述带钢在变厚段的随时间厚度变化速率。In some embodiments of the present application, based on the foregoing solution, the calculation of the thickness change rate of the strip steel in the thickening section over time based on the thickness change parameter and the predicted finished product length includes: based on the head Head and tail thickness variation, the head length of the straight section of the thickness, the length of the tail of the straight section of the thickness and the predicted finished product length, calculate the thickness change rate of the strip steel in the thickening section along with the length; The thickness change rate of the strip steel in the thickening section along with the length and the real-time rolling speed are calculated to calculate the thickness change rate of the strip steel in the thickening section with time.
在本申请的一些实施例中，基于前述方案，所述基于所述头部和尾部厚度变化量、所述厚度平直段头部长度、所述厚度平直段尾部长度以及所述预测成品长度，计算所述带钢在变厚段随长度的厚度变化率，包括：In some embodiments of the present application, based on the aforementioned solution, the thickness variation of the head and tail, the length of the head of the straight section of thickness, the length of the tail of the straight section of thickness and the predicted finished product length , calculating the thickness change rate of the strip steel in the thickening section along with the length, including:
按照以下公式计算所述带钢在变厚段的随长度的厚度变化率：According to the following formula, the thickness change rate of the strip steel in the thickening section along with the length is calculated:
rate1＝Δh/(L2-l1-l2)rate1=Δh/(L 2 -l 1 -l 2 )
其中，rate1为所述带钢在变厚段随长度的厚度变化率，Δh为所述头部和尾部厚度变化量，l1为所述厚度平直段头部长度，l2为所述厚度平直段尾部长度。Wherein, rate 1 is the thickness change rate of the strip steel in the thickening section along with the length, Δh is the thickness variation of the head and tail, l 1 is the head length of the straight section of the thickness, and l 2 is the head length of the straight section of the thickness. Thickness Straight segment tail length.
在本申请的一些实施例中，基于前述方案，所述基于所述带钢在变厚段随长度的厚度变化率以及实时轧制速度，计算所述带钢在变厚段的随时间厚度变化速率，包括：In some embodiments of the present application, based on the foregoing solution, the thickness change rate of the strip steel in the thickening section with time and the real-time rolling speed are calculated based on the thickness change rate of the strip steel in the thickening section with time rate, including:
按照以下公式计算所述带钢在变厚段的随时间厚度变化速率：Calculate the rate of change in thickness over time of the strip steel in the thickening section according to the following formula:
rate2＝rate1×Vrate 2 = rate 1 ×V
其中，rate2为所述带钢在变厚段随时间的厚度变化速率，rate1为所述带钢在变厚段随长度的厚度变化率，V为所述实时轧制速度。Wherein, rate 2 is the thickness change rate of the strip in the thickening section with time, rate 1 is the thickness change rate of the strip in the thickening section with length, and V is the real-time rolling speed.
在本申请的一些实施例中，基于前述方案，所述触发针对所述带钢的变厚连轧信号，包括：如果所述带钢的头部出轧机长度大于所述厚度平直段头部长度，则触发针对所述带钢的变厚连轧信号。In some embodiments of the present application, based on the foregoing solution, the triggering of the thickening continuous rolling signal for the strip includes: if the length of the head of the strip out of the rolling mill is longer than the head of the straight section of thickness length, then trigger the thickening continuous rolling signal for the strip.
在本申请的一些实施例中，所述方法还包括：当所述带钢完成热连轧后，复位所有参数设定。In some embodiments of the present application, the method further includes: after the continuous hot rolling of the steel strip is completed, resetting all parameter settings.
基于上述方案，本申请提供的技术方案至少有以下优点和进步之处：Based on the above scheme, the technical scheme provided by the application has at least the following advantages and improvements:
在本申请中，通过轧制过程中的各种参数以及成品规格数据，确定厚度变化速率，将计算得到的厚度变化速率输入热连轧控制逻辑，可以实现不增加任何硬件产品和投资的情况下，通过该控制方法的开发，实现生产纵向厚度连续均匀变化的热轧带钢产品的目的，并可以控制头、尾厚度保持段长度，全长带钢厚度变化量。In this application, the thickness change rate is determined through various parameters in the rolling process and finished product specification data, and the calculated thickness change rate is input into the hot rolling control logic, which can be achieved without any increase in hardware products and investment. , through the development of this control method, the purpose of producing hot-rolled steel strip products with continuous and uniform longitudinal thickness changes can be realized, and the length of the head and tail thickness maintenance sections and the variation of the full-length strip thickness can be controlled.
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本申请。It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
附图说明Description of drawings
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本申请的实施例，并与说明书一起用于解释本申请的原理。显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。在附图中：The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description serve to explain the principles of the application. Apparently, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative efforts. In the attached picture:
图1示出了根据本申请一个实施例的热轧变厚度带钢的生产控制方法的产品要求简图；Fig. 1 shows the product requirement diagram of the production control method of the hot-rolled variable-thickness steel strip according to one embodiment of the present application;
图2示出了根据本申请一个实施例的热轧变厚度带钢的生产控制方法的流程简图；Fig. 2 shows a schematic flow chart of a production control method for a hot-rolled variable-thickness strip according to an embodiment of the present application;
图3示出了根据本申请一个实施例的热轧变厚度带钢的生产控制方法的流程简图；Fig. 3 shows a schematic flow chart of a production control method for a hot-rolled variable-thickness strip according to an embodiment of the present application;
图4示出了根据本申请一个实施例的热轧变厚度带钢的生产控制方法的流程简图；Fig. 4 shows a schematic flow chart of a production control method for a hot-rolled variable-thickness strip according to an embodiment of the present application;
图5示出了根据本申请一个实施例的热轧变厚度带钢的生产控制方法的实际厚度变化图。Fig. 5 shows the actual thickness change diagram of the production control method of hot-rolled variable-thickness steel strip according to an embodiment of the present application.
具体实施方式Detailed ways
现在将参考附图更全面地描述示例实施方式。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的范例；相反，提供这些实施方式使得本申请将更加全面和完整，并将示例实施方式的构思全面地传达给本领域的技术人员。Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concepts of example embodiments to those skilled in the art.
请参阅图1。See Figure 1.
图1示出了根据本申请一个实施例的热轧变厚度带钢的生产控制方法的产品要求简图，如图1所示，卷最内圈变壁厚段分为A、B、C三个阶段，A段为薄壁区，B段为厚度渐变区，C段为厚壁区。因为类似产品沿带钢长度方向有均匀的厚度变化，现有的热连轧产线只能轧制厚度相对一致的带钢，但是可以通过本申请提供的生产控制方法进行变厚度带钢的生产。Fig. 1 has shown the product requirement diagram of the production control method of the hot-rolled variable-thickness steel strip according to an embodiment of the present application, as shown in Fig. In the first stage, section A is the thin-walled area, section B is the thickness gradient area, and section C is the thick-walled area. Because similar products have uniform thickness variation along the strip length direction, the existing hot continuous rolling production line can only roll strips with relatively uniform thickness, but the production control method provided by this application can be used to produce strips with variable thickness .
在本申请中，通过轧制过程中的各种参数以及成品规格数据，确定厚度变化速率，将计算得到的厚度变化速率输入热连轧控制逻辑，可以实现不增加任何硬件产品和投资的情况下，通过该控制方法的开发，实现生产纵向厚度连续均匀变化的热轧带钢产品的目的，并可以控制头、尾厚度保持段长度，全长带钢厚度变化量。In this application, the thickness change rate is determined through various parameters in the rolling process and finished product specification data, and the calculated thickness change rate is input into the hot rolling control logic, which can be achieved without any increase in hardware products and investment. , through the development of this control method, the purpose of producing hot-rolled steel strip products with continuous and uniform longitudinal thickness changes can be realized, and the length of the head and tail thickness maintenance sections and the variation of the full-length strip thickness can be controlled.
请参阅图2。See Figure 2.
图2示出了根据本申请一个实施例的热轧变厚度带钢的生产控制方法的流程简图，所述方法可以包括步骤S201-S204：Fig. 2 shows a schematic flowchart of a production control method for hot-rolled variable-thickness steel strip according to an embodiment of the present application, and the method may include steps S201-S204:
步骤S201，根据热连轧带钢的产品需求，设定带钢的厚度变化参数，所述厚度变化参数用于表征带钢生产过程中的厚度变化情况。Step S201 , according to the product requirements of the hot continuous rolled steel strip, set the thickness variation parameters of the strip steel, and the thickness variation parameters are used to characterize the thickness variation in the production process of the strip steel.
步骤S202，获取带钢生产参数，所述带钢生产参数包括中间坯参数、切头量、切尾量、成品带钢厚度以及实时轧制速度。Step S202, obtaining strip steel production parameters, said strip steel production parameters including intermediate billet parameters, head trimming amount, tail trimming amount, finished strip steel thickness and real-time rolling speed.
步骤S203，基于所述厚度变化参数以及所述带钢生产参数，确定所述带钢在变厚段的随时间厚度变化速率。Step S203, based on the thickness change parameter and the strip steel production parameter, determine the time-dependent thickness change rate of the strip steel in the thickening section.
步骤S204，在触发针对所述带钢的变厚连轧信号后，根据所述随时间厚度变化速率进行变厚度热连轧。Step S204, after triggering the thickening continuous rolling signal for the steel strip, performing thickness variable hot rolling according to the thickness change rate over time.
在本申请中，所述厚度变化参数可以包括：头部和尾部厚度变化量、厚度平直段头部长度以及厚度平直段尾部长度。In the present application, the thickness variation parameters may include: head and tail thickness variation, length of the head of the straight section of thickness, and length of tail of the straight section of thickness.
在本申请中，所述中间坯参数可以包括中间坯长度和中间坯厚度。需要说明的是，本申请所述的中间坯为连铸坯经粗轧机进行轧制后的出品，然后此出品作为坯料供精轧机进行精轧，所以称为中间坯。中间坯的参数数据对于整体热连轧十分重要，粗轧以及精轧的机架设置往往需要根据中间坯参数进行设计。In the present application, the intermediate blank parameters may include intermediate blank length and intermediate blank thickness. It should be noted that the intermediate slab described in this application is the product obtained after the continuous casting slab is rolled by a rough rolling mill, and then this product is used as a billet for finishing rolling by a finishing mill, so it is called an intermediate slab. The parameter data of the intermediate billet is very important for the overall continuous hot rolling, and the stand settings for rough rolling and finishing rolling often need to be designed according to the intermediate billet parameters.
请参阅图3。See Figure 3.
图3示出了根据本申请一个实施例的热轧变厚度带钢的生产控制方法的流程简图，如图3所示，在步骤S203中，所述基于所述厚度变化参数以及所述带钢生产参数，确定所述带钢在变厚段的随时间厚度变化速率的方法可以包括步骤S301-S302：Fig. 3 shows a simplified flow chart of a production control method for hot-rolled variable-thickness steel strip according to an embodiment of the present application. As shown in Fig. 3, in step S203, the Steel production parameters, the method for determining the thickness change rate of the strip steel in the thickening section with time may include steps S301-S302:
步骤S301，基于所述厚度变化参数以及所述带钢生产参数，确定所述带钢的预测成品长度。Step S301, based on the thickness variation parameter and the strip production parameter, determine the predicted finished length of the strip.
步骤S302，基于所述厚度变化参数以及所述预测成品长度，计算所述带钢在变厚段的随时间厚度变化速率。Step S302, based on the thickness change parameter and the predicted finished product length, calculate the time-dependent thickness change rate of the strip in the thickening section.
在本申请中，在步骤S301中，所述基于所述厚度变化参数以及所述带钢生产参数，确定所述带钢的预测成品长度的方法可以包括：In the present application, in step S301, the method for determining the predicted finished product length of the strip based on the thickness variation parameter and the strip production parameter may include:
按照以下公式计算所述带钢的预测成品长度：The predicted finished length of the strip is calculated according to the following formula:
其中，L2为所述带钢的预测成品长度，l1为所述厚度平直段头部长度，l2为所述厚度平直段尾部长度，L1为所述带钢的中间坯长度，h2为所述成品带钢厚度，h1为中间坯厚度，x为所述切头量，y为所述切尾量，Δh为所述头部和尾部厚度变化量。Wherein, L 2 is the predicted finished product length of the strip steel, l 1 is the length of the head of the straight section of the thickness, l 2 is the tail length of the straight section of the thickness, and L 1 is the length of the middle billet of the strip steel , h 2 is the thickness of the finished strip, h 1 is the thickness of the intermediate slab, x is the amount of the cut head, y is the amount of the tail cut, and Δh is the change in the thickness of the head and tail.
请参阅图4。See Figure 4.
图4示出了根据本申请一个实施例的热轧变厚度带钢的生产控制方法的流程简图，如图4所示，在步骤S302中，所述基于所述厚度变化参数以及所述预测成品长度，计算所述带钢在变厚段的随时间厚度变化速率的方法可以包括步骤S401-S402：Fig. 4 shows a simplified flow chart of a production control method for hot-rolled variable-thickness strip steel according to an embodiment of the present application. As shown in Fig. 4, in step S302, the Finished product length, the method for calculating the thickness change rate of the strip steel in the thickening section with time may include steps S401-S402:
步骤S401，基于所述头部和尾部厚度变化量、所述厚度平直段头部长度、所述厚度平直段尾部长度以及所述预测成品长度，计算所述带钢在变厚段随长度的厚度变化率。Step S401, based on the change in thickness of the head and tail, the length of the head of the straight section of thickness, the length of the tail of the straight section of thickness, and the predicted length of the finished product, calculate the length of the strip in the thickening section. thickness change rate.
步骤S402，基于所述带钢在变厚段随长度的厚度变化率以及实时轧制速度，计算所述带钢在变厚段的随时间厚度变化速率。Step S402 , based on the thickness change rate of the strip in the thickening section along with the length and the real-time rolling speed, calculate the time-dependent thickness changing rate of the strip in the thickening section.
在本申请中，在步骤S401中，所述基于所述头部和尾部厚度变化量、所述厚度平直段头部长度、所述厚度平直段尾部长度以及所述预测成品长度，计算所述带钢在变厚段随长度的厚度变化率的方法可以包括：In this application, in step S401, the calculation is based on the head and tail thickness variation, the head length of the thickness straight section, the tail length of the thickness straight section and the predicted finished product length. The method for describing the thickness change rate of the strip in the thickening section with the length may include:
按照以下公式计算所述带钢在变厚段的随长度的厚度变化率：According to the following formula, the thickness change rate of the strip steel in the thickening section along with the length is calculated:
rate1＝Δh/(L2-l1-l2)rate1=Δh/(L 2 -l 1 -l 2 )
其中，rate1为所述带钢在变厚段随长度的厚度变化率，Δh为所述头部和尾部厚度变化量，l1为所述厚度平直段头部长度，l2为所述厚度平直段尾部长度。Wherein, rate 1 is the thickness change rate of the strip steel in the thickening section along with the length, Δh is the thickness variation of the head and tail, l 1 is the head length of the straight section of the thickness, and l 2 is the head length of the straight section of the thickness. Thickness Straight segment tail length.
在本申请中，在步骤S402中，所述基于所述带钢在变厚段随长度的厚度变化率以及实时轧制速度，计算所述带钢在变厚段的随时间厚度变化速率的方法包括：In the present application, in step S402, the method of calculating the thickness change rate of the strip steel in the thickening section with time based on the thickness change rate of the strip steel in the thickening section along with the length and the real-time rolling speed include:
按照以下公式计算所述带钢在变厚段的随时间厚度变化速率：Calculate the rate of change in thickness over time of the strip steel in the thickening section according to the following formula:
rate2＝rate1×Vrate 2 = rate 1 ×V
其中，rate2为所述带钢在变厚段随时间的厚度变化速率，rate1为所述带钢在变厚段随长度的厚度变化率，V为所述实时轧制速度。Wherein, rate 2 is the thickness change rate of the strip in the thickening section with time, rate 1 is the thickness change rate of the strip in the thickening section with length, and V is the real-time rolling speed.
在本申请中，可以根据厚度变化参数以及带钢生产参数计算厚度随带钢长度的变化，即轧制一米带钢时，带钢厚度变化多少，当确定了所述带钢在变厚段随长度的厚度变化率后，再计算变厚段随长度的厚度变化率和实时轧制速度的乘积，不难得到所述带钢在变厚段的随时间厚度变化速率。计算所得的厚度变化速率可以作为随时间变化厚度偏差补偿目标值，通过跟踪判断当头部出轧机长度大于a后，开始附加rate2将其作为AGC厚度偏差输入实现变厚度控制。In this application, the variation of the thickness with the length of the strip can be calculated according to the thickness variation parameters and the strip production parameters, that is, how much the thickness of the strip changes when one meter of strip is rolled. After the thickness change rate along the length, calculate the product of the thickness change rate over the length of the thickened section and the real-time rolling speed, and it is not difficult to obtain the thickness change rate of the strip steel in the thickened section over time. The calculated thickness change rate can be used as the target value of thickness deviation compensation over time. By tracking and judging that when the length of the head out of the rolling mill is greater than a, start adding rate 2 and use it as the AGC thickness deviation input to realize variable thickness control.
在本申请中，所述触发针对所述带钢的变厚连轧信号的方法包括：如果所述带钢的头部出轧机长度大于所述厚度平直段头部长度，则触发针对所述带钢的变厚连轧信号。In the present application, the method for triggering the thickening continuous rolling signal for the strip includes: if the head exit length of the strip is greater than the head length of the straight section of thickness, triggering the signal for the strip Strip thickening continuous rolling signal.
在本申请中，如果所述带钢的头部出轧机长度大于所述厚度平直段头部长度说明所述带钢已经进入变厚段，需要及时进行厚度控制补偿，以成功轧制出变厚度的带钢。In this application, if the head exit length of the strip steel is greater than the head length of the straight section of thickness, it means that the strip steel has entered the thickened section, and thickness control compensation needs to be carried out in time to successfully roll out the variable section. Thickness of strip steel.
请参阅图5。See Figure 5.
图5示出了根据本申请一个实施例的热轧变厚度带钢的生产控制方法的实际厚度变化图，如图5所示，在采用本申请提供的生产控制方法后，带钢在进入变厚段之后，厚度发生相对均匀的变化，说明成功针对变厚度带钢进行热连轧。Fig. 5 shows the actual thickness change diagram of the production control method of the hot-rolled variable-thickness strip according to an embodiment of the present application. After the thick section, there is a relatively uniform change in thickness, indicating successful hot rolling for variable thickness strip.
在本申请中，所述方法还包括：当所述带钢完成热连轧后，复位所有参数设定。当本块带钢轧制完成后，后续再进行轧制的钢种规格或者成品规格容易产生差异，因此需要根据不同厚度变化参数以及带钢生产参数进行厚度变化率的重新计算以及重新设定。In the present application, the method further includes: after the continuous hot rolling of the steel strip is completed, resetting all parameter settings. After the rolling of this piece of strip steel is completed, the specifications of steel grades or finished product specifications for subsequent rolling are likely to be different. Therefore, it is necessary to recalculate and reset the thickness change rate according to different thickness change parameters and strip steel production parameters.
本领域技术人员在考虑说明书及实践这里公开的实施方式后，将容易想到本申请的其它实施方案。本申请旨在涵盖本申请的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本申请的一般性原理并包括本申请未公开的本技术领域中的公知常识或惯用技术手段。Other embodiments of the present application will be readily apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any modification, use or adaptation of the application, these modifications, uses or adaptations follow the general principles of the application and include common knowledge or conventional technical means in the technical field not disclosed in the application .
应当理解的是，本申请并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本申请的范围仅由所附的权利要求来限制。It should be understood that the present application is not limited to the precise constructions which have been described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
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| CN108655182A (en) * | 2017-03-29 | 2018-10-16 | 宝山钢铁股份有限公司 | A kind of hot-strip production method of overall length thickness consecutive variations |
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| JP2006272386A (en) * | 2005-03-29 | 2006-10-12 | Jfe Steel Kk | Thickness control method of deformed steel plate |
| CN103785692A (en) * | 2012-10-31 | 2014-05-14 | 宝山钢铁股份有限公司 | Method of producing strip steel with various target thicknesses in length direction through hot continuous rolling mill set |
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