Method and device for determining thickness reduction value of temper mill with rolling force mode

Abstract

The present invention relates to the technical field of steel rolling production, and particularly to a method for determining the thickness reduction value of a rolling force mode skin pass mill, the method comprising: during the process of forming pickled plates from strip steel, obtaining the actual thickness of the strip steel after passing through a hot rolling mill, the finished product thickness of the strip steel after passing through a pickling process, the target pickling thickness reduction value of the strip steel in the pickling process, and the skin pass thickness reduction value of the strip steel in a tension leveling mill; and obtaining the skin pass thickness reduction value of the strip steel in a skin pass mill according to the actual thickness, the skin pass thickness reduction value, the target pickling thickness reduction value, and the finished product thickness. This method efficiently determines the thickness reduction value of pickled plates in the skin pass process of the rolling force mode, improves the accuracy of the thickness reduction value of pickled plates in the skin pass process, enables pickled plates to reach a high-precision thickness quality control level, and meets the application requirements of high-end pickled plates.

Description

Technical Field

[0001] The present invention relates to the technical field of steel rolling production, and particularly to a method and device for determining the thickness reduction value of a rolling force mode skin pass mill. Background Art

[0002] With the promotion of green manufacturing and energy conservation and emission reduction in the steel industry, pickled plates substituting cold rolling with hot rolling have become an important development direction today and are widely used in various industries. Since the pickled plates have extremely high precision requirements for thickness, the pickled plates can replace some cold rolled plates or some hot rolled plates, saving costs for enterprises. Moreover, the pickled plates have good surface quality, are convenient for welding, oiling and painting, improving the surface finish and enhancing the appearance effect.

[0003] In order to ensure the precision requirements for the thickness of pickled plates, it is usually necessary to accurately control the slab thickness in each production process of pickled plates. Currently, in the production process of pickled plates, by sampling the hot rolled coil before and after skin pass rolling, the thickness reduction value in the rolling force mode skin pass rolling process is obtained, resulting in the problem of low precision of the thickness reduction value of pickled plates in the rolling force mode skin pass rolling process. Summary of the Invention

[0004] By providing a method and device for determining the thickness reduction value of a rolling force mode skin pass mill, the embodiments of the present application solve the technical problem of low precision of the thickness reduction value of pickled plates in the rolling force mode skin pass rolling process in the prior art, and achieve the technical effects of efficiently determining the thickness reduction value of pickled plates in the rolling force mode skin pass rolling process, improving the precision of the thickness reduction value of pickled plates in the skin pass rolling process, enabling pickled plates to reach a high-precision thickness quality control level, and meeting the application requirements of high-end pickled plates.

[0005] In a first aspect, an embodiment of the present invention provides a method for determining the thickness reduction value of a rolling force mode skin pass mill, including:

[0006] During the process of forming a pickled plate from a strip steel, obtaining the actual thickness of the strip steel after passing through a hot rolling mill, the finished thickness of the strip steel after passing through a pickling process, the target pickling thickness reduction value of the strip steel in the pickling process, and the tension leveling thickness reduction value of the strip steel in a tension leveling mill;

[0007] According to the actual thickness, the tension leveling thickness reduction value, the target pickling thickness reduction value, and the finished thickness, obtaining the skin pass thickness reduction value of the strip steel in a skin pass mill.

[0008] Preferably, obtaining the target pickling thickness reduction value includes:

[0009] Obtaining the required thickness of the strip steel,

[0010] If the required thickness is not greater than the preset thickness threshold, the target pickling thickness reduction value is the first pickling thickness reduction value;

[0011] If the required thickness is greater than the preset thickness threshold, the target pickling thickness reduction value is the second pickling thickness reduction value, where the second pickling thickness reduction value is greater than the first pickling thickness reduction value.

[0012] Preferably, obtaining the skin pass thickness reduction value includes:

[0013] Obtaining the skin pass thickness reduction value according to the strip thickness at the inlet of the skin pass mill and the elongation rate of the skin pass mill.

[0014] Preferably, obtaining the actual thickness includes:

[0015] Measuring the actual thickness within a preset length range of the strip by using the edge drop gauge or thickness gauge of the hot rolling mill.

[0016] Preferably, obtaining the finished product thickness includes:

[0017] Measuring the finished product thickness within the finished product length range of the strip by using the edge drop gauge or thickness gauge in the pickling process.

[0018] Preferably, obtaining the skin pass thickness reduction value of the strip in the skin pass mill according to the actual thickness, the skin pass thickness reduction value, the target pickling thickness reduction value, and the finished product thickness includes:

[0019] Obtaining the skin pass thickness reduction value of the strip in the skin pass mill according to the actual thickness, the elongation rate of the skin pass mill corresponding to the skin pass thickness reduction value, the target pickling thickness reduction value, and the finished product thickness.

[0020] Based on the same inventive concept, in a second aspect, the present invention further provides a device for determining the skin pass thickness reduction value of a rolling force mode skin pass mill, including:

[0021] A first acquisition module, configured to acquire the actual thickness of the strip after passing through the hot rolling mill, the finished product thickness of the strip after passing through the pickling process, the target pickling thickness reduction value of the strip in the pickling process, and the skin pass thickness reduction value of the strip in the skin pass mill;

[0022] A second acquisition module, configured to obtain the skin pass thickness reduction value of the strip in the skin pass mill according to the actual thickness, the skin pass thickness reduction value, the target pickling thickness reduction value, and the finished product thickness.

[0023] Preferably, the first acquisition module is specifically configured to:

[0024] Obtain the required thickness of the strip steel.

[0025] If the required thickness is not greater than the preset thickness threshold, the target pickling thickness reduction value is the first pickling thickness reduction value.

[0026] If the required thickness is greater than the preset thickness threshold, the target pickling thickness reduction value is the second pickling thickness reduction value, where the second pickling thickness reduction value is greater than the first pickling thickness reduction value.

[0027] Preferably, the first acquisition module is specifically configured to:

[0028] Obtain the skin pass thickness reduction value, including:

[0029] Obtain the skin pass thickness reduction value according to the strip steel thickness at the inlet of the skin pass mill and the elongation of the skin pass mill.

[0030] Preferably, the second acquisition module is specifically configured to:

[0031] Obtain the skin pass thickness reduction value of the strip steel in the skin pass mill according to the actual thickness, the elongation of the skin pass mill corresponding to the skin pass thickness reduction value, the target pickling thickness reduction value, and the finished product thickness.

[0032] One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

[0033] In the embodiments of the present invention, during the process of forming pickled sheet from strip steel, first obtain the actual thickness of the strip steel after passing through the hot rolling mill, the finished product thickness of the strip steel after passing through the pickling process, the target pickling thickness reduction value of the strip steel in the pickling process, and the skin pass thickness reduction value of the strip steel in the skin pass mill. Here, through the existing equipment of the pickled sheet, the actual thickness, the finished product thickness, the target pickling thickness reduction value, and the skin pass thickness reduction value are obtained efficiently and quickly, and the accuracy of the above data obtained is relatively high, which lays a solid foundation for obtaining the skin pass thickness reduction value subsequently, and also saves production costs and production resources.

[0034] Then, according to the actual thickness, the skin pass thickness reduction value, the target pickling thickness reduction value, and the finished product thickness, obtain the skin pass thickness reduction value of the strip steel in the skin pass mill, so as to efficiently determine the thickness reduction value of the pickled sheet in the skin pass process of the rolling force mode, improve the accuracy of the thickness reduction value of the pickled sheet in the skin pass process, enable the pickled sheet to reach a high-precision thickness quality control level, and meet the application requirements of high-end pickled sheets. Moreover, through the method for determining the thickness reduction value of the rolling force mode skin pass mill in the embodiments of the present invention, it is also possible to conveniently and accurately determine the thickness reduction value of the rolling force mode skin pass mill for strip steels of various product specifications. Description of the Drawings

[0035] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0036] Figure 1 A schematic flow chart of the steps of a method for determining the thickness reduction value of a rolling force mode skin pass mill in an embodiment of the present invention is shown;

[0037] Figure 2 A schematic diagram of a preset length range of a strip steel in an embodiment of the present invention is shown;

[0038] Figure 3 A schematic diagram of the modules of a device for determining the thickness reduction value of a rolling force mode skin pass mill in an embodiment of the present invention is shown. Detailed Embodiments

[0039] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0040] Embodiment 1

[0041] The first embodiment of the present invention provides a method for determining the thickness reduction value of a rolling force mode skin pass mill, as Figure 1 shown, including:

[0042] S101, during the process of forming pickled plates from strip steel, obtain the actual thickness of the strip steel after passing through the hot rolling mill, the finished product thickness of the strip steel after passing through the pickling process, the target pickling thickness reduction value of the strip steel in the pickling process, and the skin pass thickness reduction value of the strip steel in the tension leveling mill;

[0043] S102, according to the actual thickness, the skin pass thickness reduction value, the target pickling thickness reduction value, and the finished product thickness, obtain the skin pass thickness reduction value of the strip steel in the skin pass mill.

[0044] The method for determining the thickness reduction value of the rolling force mode skin pass mill in this embodiment is applied to the production process of pickled plates. The production process of pickled plates is that the strip steel passes through the hot continuous rolling process (hot continuous rolling mill) - skin pass process (skin pass mill) - tension leveling process (tension leveling mill) - pickling process in sequence to form finished pickled plates.

[0045] It should also be noted that in the production process of pickled plates, the temper mill is a machine with low cost and high-efficiency tempering. Generally, a thickness gauge or edge drop gauge is not configured in the temper mill to measure the tempering thickness reduction value in the temper mill in order to save production costs. Since the thickness gauge or edge drop gauge is costly, configuring it in the temper mill will greatly increase the production cost of the production line. Therefore, through the method for determining the tempering thickness reduction value of the rolling force mode temper mill in this embodiment, not only can the tempering thickness reduction value of the strip in the temper mill be obtained efficiently and accurately, but also production costs and production resources can be saved.

[0046] Next, in combination with Figure 1 to introduce in detail the specific implementation steps of the method for determining the tempering thickness reduction value of the rolling force mode temper mill provided in this embodiment:

[0047] First, perform step S101. During the process of the strip forming a pickled plate, obtain the actual thickness of the strip after passing through the hot rolling mill, the finished thickness of the strip after passing through the pickling process, the target pickling thickness reduction value of the strip in the pickling process, and the skin pass thickness reduction value of the strip in the skin pass mill.

[0048] Specifically, during the process of the strip forming a pickled plate, the actual thickness of the strip after passing through the hot rolling mill is the thickness of the strip at the outlet of the hot continuous rolling mill after passing through the hot continuous rolling mill. The finished thickness of the strip after passing through the pickling process is the thickness of the formed finished pickled plate. Since the strip needs to be washed with oxide scale during the pickling process, the target pickling thickness reduction value of the strip in the pickling process is the thickness of the oxide scale washed off on the strip during pickling. Since the strip will be stretched in the skin pass mill, the skin pass thickness reduction value of the strip in the skin pass mill is the difference between the thickness of the strip at the inlet of the skin pass mill and the thickness at the outlet of the skin pass mill, that is, the thickness difference of the strip before and after skin pass.

[0049] The specific steps to obtain the actual thickness of the strip after passing through the hot rolling mill are as follows: within the preset length range of the strip, measure the actual thickness through the edge drop gauge or thickness gauge of the hot rolling mill. Among them, the preset length range is the distance range between the first measurement point at the first preset distance from the head of the strip passing through the hot continuous rolling mill and the second measurement point at the second preset distance from the tail of the strip passing through the hot continuous rolling mill. The specific values of the preset length range, the first preset distance, and the second preset distance are set according to actual requirements.

[0050] For example, as Figure 2As shown, the first measurement point is the measurement point 10 meters away from the head of the strip passing through the hot continuous rolling mill, and the second measurement point is the measurement point 10 meters away from the tail of the strip passing through the hot continuous rolling mill. The distance range between the first measurement point and the second measurement point is the preset length range. The selection of the preset length range is to avoid the influence of the unstable thickness at the head and tail of the strip.

[0051] In addition, within the preset length range of the strip, multiple thickness values of the strip passing through the hot rolling mill are measured by the edge drop gauge or thickness gauge in the hot rolling mill, and the average value or median value of the multiple thickness values is taken as the actual thickness.

[0052] In this embodiment, within the preset length range of the strip, the actual thickness is accurately obtained by the edge drop gauge or thickness gauge in the hot rolling mill, improving the accuracy of the obtained actual thickness. The accuracy of the actual thickness can reach 0.001 m.

[0053] The specific steps to obtain the finished product thickness of the strip after the pickling process are as follows: within the finished product length range of the strip, the finished product thickness is measured by the edge drop gauge or thickness gauge in the pickling process. Among them, the finished product length range is the distance range between the third measurement point, which is the third preset distance away from the head of the pickled sheet (the strip forms a finished product strip after passing through the pickling process, that is, the pickled sheet), and the fourth measurement point, which is the fourth preset distance away from the tail of the pickled sheet. The specific values of the finished product length range, the third preset distance, and the fourth preset distance are set according to actual requirements.

[0054] For example, the third measurement point is the measurement point 20 meters away from the head of the pickled sheet, the fourth measurement point is the measurement point 25 meters away from the tail of the pickled sheet, and the distance range between the third measurement point and the fourth measurement point is the finished product length range. The principle of obtaining the finished product length range is the same as that of obtaining the preset length range. The selection of the finished product length range is to avoid the unstable influence of the thickness at the head and tail of the pickled sheet.

[0055] In addition, within the finished product length range of the strip, multiple thickness values of the pickled sheet are measured by the edge drop gauge or thickness gauge in the pickling process, and the average value or median value of the multiple thickness values is taken as the finished product thickness.

[0056] In this embodiment, within the finished product length range of the strip, the finished product thickness is accurately obtained by the edge drop gauge or thickness gauge in the pickling process, improving the accuracy of the obtained finished product thickness. The accuracy of the finished product thickness can reach 0.001 mm.

[0057] The steps to obtain the target pickling thickness reduction value are as follows: First, obtain the required thickness of the strip. Here, the required thickness of the strip is the thickness of the pickled sheet to be produced. Then, judge the required thickness. If the required thickness is not greater than the preset thickness threshold, the target pickling thickness reduction value is the first pickling thickness reduction value. If the required thickness is greater than the preset thickness threshold, the target pickling thickness reduction value is the second pickling thickness reduction value, where the second pickling thickness reduction value is greater than the first pickling thickness reduction value. Among them, the preset thickness threshold, the first pickling thickness reduction value, and the second pickling thickness reduction value are set according to actual requirements. Usually, the preset thickness threshold is 3mm, the first pickling thickness reduction value is 0.01mm, and the second pickling thickness reduction value is 0.015mm.

[0058] For example, if the required thickness of the strip is 2mm, and 2mm is not greater than the preset thickness threshold of 3mm, that is, 2mm < 3mm, then the target pickling thickness reduction value is the first pickling thickness reduction value, that is, the target pickling thickness reduction value is 0.01mm. If the required thickness of the strip is 4mm, and 4mm is greater than the preset thickness threshold of 3mm, then the target pickling thickness reduction value is the second pickling thickness reduction value, that is, the target pickling thickness reduction value is 0.015mm.

[0059] During the pickling process, the pickling thickness reduction value is mainly the thickness of the scale removed from the strip by pickling. By measuring the scale thickness value, the scale thickness range on the upper or lower surface of the strip is 0.01 - 0.02mm. The scale thickness is directly related to the strip thickness. For strips with a required thickness not greater than 3mm, their pickling thickness reduction value is 0.01mm. For strips with a required thickness greater than 3mm, their pickling thickness reduction value is 0.015mm.

[0060] The specific steps to obtain the skin pass thickness reduction value are as follows: According to the strip thickness at the entrance of the skin pass mill and the elongation rate of the skin pass mill, obtain the skin pass thickness reduction value. Among them, the strip thickness at the entrance of the skin pass mill is determined according to the actual thickness and the temper rolling thickness reduction value. The strip thickness at the entrance of the skin pass mill is the thickness of the strip when the strip is at the entrance of the skin pass mill. The temper rolling thickness reduction value is the difference between the thickness of the strip when it is at the entrance of the temper mill and the thickness when it is at the exit of the temper mill, that is, the difference before and after the strip is tempered. Since the temper mill tempers the strip according to the rolling force of the temper mill, the temper rolling thickness reduction value is also the thickness reduction value corresponding to the rolling force of the temper mill.

[0061] Specifically, the thickness reduction value of the tension leveling = the strip thickness at the inlet of the tension leveling unit × the elongation rate of the tension leveling unit, where the elongation rate of the tension leveling unit is set according to actual process requirements. The strip thickness at the inlet of the tension leveling unit = the actual thickness - the thickness reduction value of the skin pass. Then, the thickness reduction value of the tension leveling = (the actual thickness - the thickness reduction value of the skin pass) × the elongation rate of the tension leveling unit.

[0062] Next, step S102 is executed to obtain the thickness reduction value of the strip in the skin pass unit according to the actual thickness, the thickness reduction value of the tension leveling, the target thickness reduction value of pickling, and the finished product thickness.

[0063] Specifically, the thickness reduction value of the strip in the skin pass unit is obtained according to the actual thickness, the elongation rate of the tension leveling unit corresponding to the thickness reduction value of the tension leveling, the target thickness reduction value of pickling, and the finished product thickness.

[0064] According to the thickness reduction process of the pickled sheet in the production process, the finished product thickness = the actual thickness - the thickness reduction value of the skin pass - the thickness reduction value of the tension leveling - the target thickness reduction value of pickling. Then, the thickness reduction value of the skin pass = the actual thickness - the finished product thickness - the thickness reduction value of the tension leveling - the target thickness reduction value of pickling. Among them, the thickness reduction value of the tension leveling = (the actual thickness - the thickness reduction value of the skin pass) × the elongation rate of the tension leveling unit.

[0065] The thickness reduction value of the skin pass = the actual thickness - (the finished product thickness + the target thickness reduction value of pickling) / (1 - the elongation rate of the tension leveling unit).

[0066] In this embodiment, in the case where no thickness detection instrument is configured at the outlet of the skin pass unit, through existing equipment and production processes, according to the actual thickness of the strip after passing through the hot rolling unit, the finished product thickness of the strip after passing through the pickling process, the target thickness reduction value of the strip in the pickling process, and the thickness reduction value of the strip in the tension leveling unit, the thickness reduction value of the strip in the skin pass unit is obtained, enabling the pickled sheet to reach a high-precision thickness quality control level and meet the application requirements of high-end pickled sheets.

[0067] It should also be noted that when the skin pass unit levels the strip, the rolling force of the skin pass unit is set manually according to actual requirements. For strips of different steel grades, the rolling force applied by the skin pass unit to strips of different steel grades is different. Or for strips of the same steel grade, according to actual requirements, the rolling force applied by the skin pass unit to it is also different. Therefore, through the method for determining the thickness reduction value of the skin pass of the rolling force mode in this embodiment, the thickness reduction value of the strip in the skin pass unit under each set rolling force of each strip can be determined.

[0068] Moreover, after determining the temper rolling thickness reduction value of each strip steel under each set rolling force in the temper rolling mill through the method for determining the temper rolling thickness reduction value of the temper rolling mill according to this embodiment, the temper rolling thickness reduction values of each strip steel under each set rolling force in the temper rolling mill can be formed into a table, so as to accurately control the thickness of the pickled plate and meet the application requirements of high-end pickled plates. The format of this table can be: the column of the table is the strip steel type specification - the set rolling force of the temper rolling mill - the temper rolling thickness reduction value.

[0069] Next, the determination method of this embodiment will be described through actual examples in the production process of pickled plates:

[0070] Example 1: The steel grade is SPHC, the required thickness specification is 2.0 mm, the elongation of the skin pass mill is 1%, the set value of the rolling force of the temper rolling mill: the target rolling force is 250 KN, the average thickness of the strip steel in the middle 150 m in the hot rolling process is collected by the system: 2.060 mm, the average thickness of the strip steel in the middle 150 m after the pickling process is collected by the system: 2.012 mm, the target pickling thickness reduction value: the pickling thickness reduction of the iron sheet is 0.01 mm.

[0071] The temper rolling thickness reduction value = actual thickness - (finished product thickness + target pickling thickness reduction value) / (1 - elongation of the skin pass mill) = 2.060 - (2.012 + 0.010) / (1 - 1%) = 0.018 mm. Therefore, the thickness reduction value of the temper rolling mill is set to 0.018 mm.

[0072] Example 2: The steel grade is SPHD, the required thickness specification is 3.5 mm, the elongation of the skin pass mill is 0.4%, the set value of the rolling force of the temper rolling mill: the target rolling force is 380 KN, the average thickness of the strip steel in the middle 150 m in the hot rolling process is collected by the system: 3.525 mm, the average thickness of the strip steel in the middle 150 m after the pickling process is collected by the system: 3.436 mm, the target pickling thickness reduction value: the pickling thickness reduction of the iron sheet is 0.015 mm.

[0073] The temper rolling thickness reduction value = actual thickness - (finished product thickness + target pickling thickness reduction value) / (1 - elongation of the skin pass mill) = 3.525 - (3.436 + 0.015) / (1 - 0.4%) = 0.060 mm. Therefore, the thickness reduction value of the temper rolling mill is set to 0.060 mm.

[0074] One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

[0075] In this embodiment, during the process of forming pickled sheets from strip steel, the actual thickness of the strip steel after passing through the hot rolling mill, the finished thickness of the strip steel after passing through the pickling process, the target pickling thickness reduction value of the strip steel during the pickling process, and the temper rolling thickness reduction value of the strip steel in the temper rolling mill are obtained first. Here, through the existing equipment for pickled sheets, the actual thickness, the finished thickness, the target pickling thickness reduction value, and the temper rolling thickness reduction value are obtained efficiently and quickly, and the accuracy of the above-mentioned data is relatively high, which provides a solid foundation for obtaining the skin pass thickness reduction value subsequently, and also saves production costs and production resources.

[0076] Then, based on the actual thickness, the temper rolling thickness reduction value, the target pickling thickness reduction value, and the finished thickness, the skin pass thickness reduction value of the strip steel in the skin pass mill is obtained, so as to efficiently determine the thickness reduction value of the pickled sheet in the skin pass process in the rolling force mode, improve the accuracy of the thickness reduction value of the pickled sheet in the skin pass process, enable the pickled sheet to reach a high-precision thickness quality control level, and meet the application requirements of high-end pickled sheets. Moreover, through the method for determining the thickness reduction value of the skin pass mill in the rolling force mode of this embodiment, the thickness reduction value of the skin pass mill of strip steels of various product specifications can also be determined conveniently and accurately.

[0077] Embodiment 2

[0078] Based on the same inventive concept, the second embodiment of the present invention also provides a device for determining the thickness reduction value of a skin pass mill in the rolling force mode, as Figure 3 shown, including:

[0079] A first acquisition module 201, configured to acquire the actual thickness of the strip steel after passing through the hot rolling mill, the finished thickness of the strip steel after passing through the pickling process, the target pickling thickness reduction value of the strip steel during the pickling process, and the temper rolling thickness reduction value of the strip steel in the temper rolling mill during the process of forming pickled sheets from strip steel;

[0080] A second acquisition module 202, configured to obtain the skin pass thickness reduction value of the strip steel in the skin pass mill according to the actual thickness, the temper rolling thickness reduction value, the target pickling thickness reduction value, and the finished thickness.

[0081] As an optional embodiment, the first acquisition module 201 is used for: acquiring the target pickling thickness reduction value, including:

[0082] acquiring the required thickness of the strip steel,

[0083] if the required thickness is not greater than a preset thickness threshold, then the target pickling thickness reduction value is the first pickling thickness reduction value;

[0084] If the required thickness is greater than the preset thickness threshold, the target pickling thickness reduction value is the second pickling thickness reduction value, where the second pickling thickness reduction value is greater than the first pickling thickness reduction value.

[0085] As an alternative embodiment, the first acquisition module 201 is configured to: acquire the skin pass thickness reduction value, including:

[0086] Obtain the skin pass thickness reduction value according to the strip thickness at the inlet of the skin pass mill and the elongation of the skin pass mill.

[0087] As an alternative embodiment, the first acquisition module 201 is configured to: acquire the actual thickness, including:

[0088] Measure the actual thickness within a preset length range of the strip by using the edge drop gauge or thickness gauge of the hot rolling mill.

[0089] As an alternative embodiment, the first acquisition module 201 is configured to: acquire the finished product thickness, including:

[0090] Measure the finished product thickness within the finished product length range of the strip by using the edge drop gauge or thickness gauge in the pickling process.

[0091] As an alternative embodiment, the second acquisition module 202 is configured to: obtain the skin pass thickness reduction value of the strip in the skin pass mill according to the actual thickness, the skin pass thickness reduction value, the target pickling thickness reduction value, and the finished product thickness, including:

[0092] Obtain the skin pass thickness reduction value of the strip in the skin pass mill according to the actual thickness, the elongation of the skin pass mill corresponding to the skin pass thickness reduction value, the target pickling thickness reduction value, and the finished product thickness.

[0093] Since the device for determining the skin pass thickness reduction value of the rolling force mode skin pass mill introduced in this embodiment is the device adopted for implementing the method for determining the skin pass thickness reduction value of the rolling force mode skin pass mill in Embodiment 1 of the present application, based on the method for determining the skin pass thickness reduction value of the rolling force mode skin pass mill introduced in Embodiment 1 of the present application, those skilled in the art can understand the specific implementation manners and various variations of the device for determining the skin pass thickness reduction value of the rolling force mode skin pass mill in this embodiment. Therefore, the implementation of how the device for determining the skin pass thickness reduction value of the rolling force mode skin pass mill implements the method in Embodiment 1 of the present application will not be described in detail here. As long as those skilled in the art implement the device adopted for the method for determining the skin pass thickness reduction value of the rolling force mode skin pass mill in Embodiment 1 of the present application, it falls within the scope of protection of the present application.

[0094] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can 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.) that contain computer-usable program code.

[0095] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows 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 the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in Figure 1 one or more of the flows Figure 1 or blocks or the combination of blocks.

[0096] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means that implement the functions specified in Figure 1 one or more of the flows Figure 1 or blocks or the combination of blocks.

[0097] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are performed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in Figure 1 one or more of the flows Figure 1 or blocks or the combination of blocks.

[0098] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications that fall within the scope of the present invention.

[0099] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims

1. A method for determining the thickness reduction value of a rolling force mode skin pass mill, characterized in that, Including: During the process of forming pickled sheets from strip steel, obtaining the actual thickness of the strip steel after passing through the hot rolling mill, the finished thickness of the strip steel after passing through the pickling process, the target pickling thickness reduction value of the strip steel in the pickling process, and the skin pass thickness reduction value of the strip steel in the skin pass mill; Based on the actual thickness, the skin pass thickness reduction value, the target pickling thickness reduction value, and the finished thickness, obtaining the skin pass thickness reduction value of the strip steel in the temper mill; Specifically, based on the actual thickness, the elongation of the skin pass mill corresponding to the skin pass thickness reduction value, the target pickling thickness reduction value, and the finished thickness, obtaining the skin pass thickness reduction value of the strip steel in the temper mill; Obtaining the actual thickness includes: Within a preset length range of the strip steel, measuring the actual thickness through the edge drop gauge or thickness gauge of the hot rolling mill; The preset length range is the distance range between a first measurement point at a first preset distance from the head of the strip steel passing through the hot continuous rolling mill and a second measurement point at a second preset distance from the tail of the strip steel passing through the hot continuous rolling mill; Obtaining the finished thickness includes: Within the finished length range of the strip steel, measuring the finished thickness through the edge drop gauge or thickness gauge in the pickling process; The finished length range is the distance range between a third measurement point at a third preset distance from the head of the finished strip steel pickled sheet and a fourth measurement point at a fourth preset distance from the tail of the pickled sheet.

2. The method according to claim 1, characterized in that, Obtaining the target pickling thickness reduction value includes: Obtaining the required thickness of the strip steel, If the required thickness is not greater than a preset thickness threshold, then the target pickling thickness reduction value is the first pickling thickness reduction value; If the required thickness is greater than the preset thickness threshold, then the target pickling thickness reduction value is the second pickling thickness reduction value, where the second pickling thickness reduction value is greater than the first pickling thickness reduction value.

3. The method according to claim 1, characterized in that, Obtaining the skin pass thickness reduction value includes: Based on the thickness of the strip steel at the inlet of the skin pass mill and the elongation of the skin pass mill, obtaining the skin pass thickness reduction value.

4. A device for determining the thickness reduction value of a rolling force mode skin pass mill, characterized in that, Including: A first obtaining module, configured to obtain the actual thickness of the strip steel after passing through the hot rolling mill, the finished thickness of the strip steel after passing through the pickling process, the target pickling thickness reduction value of the strip steel in the pickling process, and the skin pass thickness reduction value of the strip steel in the skin pass mill; A second obtaining module, configured to obtain the skin pass thickness reduction value of the strip steel in the temper mill according to the actual thickness, the skin pass thickness reduction value, the target pickling thickness reduction value, and the finished thickness; Specifically, based on the actual thickness, the elongation of the skin pass mill corresponding to the skin pass thickness reduction value, the target pickling thickness reduction value, and the finished thickness, obtaining the skin pass thickness reduction value of the strip steel in the temper mill; Obtaining the actual thickness includes: Within a preset length range of the strip steel, measuring the actual thickness through the edge drop gauge or thickness gauge of the hot rolling mill; The preset length range is the distance range between a first measurement point that is a first preset distance from the head of the strip passing through the hot continuous rolling mill and a second measurement point that is a second preset distance from the tail of the strip passing through the hot continuous rolling mill; Obtaining the finished product thickness includes: Within the finished product length range of the strip, measuring the finished product thickness through an edge drop gauge or a thickness gauge in the pickling process; The finished product length range is the distance range between a third measurement point that is a third preset distance from the head of the pickled plate of the finished product strip and a fourth measurement point that is a fourth preset distance from the tail of the pickled plate.

5. The device according to claim 4, characterized in that, The first acquisition module is specifically configured to: Obtain the required thickness of the strip, If the required thickness is not greater than a preset thickness threshold, the target pickling thickness reduction value is the first pickling thickness reduction value; If the required thickness is greater than the preset thickness threshold, the target pickling thickness reduction value is the second pickling thickness reduction value, where the second pickling thickness reduction value is greater than the first pickling thickness reduction value.

6. The device according to claim 4, characterized in that, The first acquisition module is specifically configured to: Obtain the skin pass thickness reduction value, including: Obtaining the skin pass thickness reduction value according to the strip thickness at the inlet of the skin pass mill and the elongation of the skin pass mill.

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