A method for controlling the pressure of a hot rolling coiling guide rule

Abstract

The application provides a pressure control method for hot rolling and coiling a guide ruler, comprising the following steps: obtaining a layer number of a product to be rolled; adding a guide ruler pressure parameter data variable according to the layer number, wherein the guide ruler pressure parameter data variable comprises N groups of data, N is an integer and N>=1; according to the working condition of a coiling machine, the N groups of data are correspondingly distributed to N coiling machines; a product to be rolled is input into an i-th coiling machine, and the guide ruler pressure of the i-th coiling machine is calculated according to the data distributed by the i-th coiling machine and the parameter information of the product to be rolled, wherein i is an integer and 1<=i<=N, so that corresponding guide ruler pressures are implemented for different steel grades, thereby avoiding problems such as cracks and wax sticking on the edges of the strip, and the guide ruler is replaced when the rolled steel grade changes, time is saved, and the productivity is improved.

Description

Technical Field

[0001] This invention relates to the field of steel rolling equipment technology, and more particularly to a pressure control method for hot rolling coil guides. Background Technology

[0002] Guide rulers are essential devices on hot rolling mills. Their function is to align the strip with the rolling centerline and feed it into the pinch rolls. As the strip enters the pinch rolls, the guide ruler clamps it, reducing coil stacking and ensuring the strip enters the coiler correctly and smoothly. On the 1580 production line, the coiling guide ruler is controlled by pressure on the working side and position on the drive side. Because the primary computer program cannot differentiate between strip grades to calculate guide ruler pressure separately, the same guide ruler pressure control for different steel grades can easily cause edge cracks and wax buildup in the strip. This is particularly evident when rolling silicon steel on the 1580 line, easily leading to coil shape defects and jamming accidents. Replacing the coiling guide ruler according to the rolling steel grade and strip thickness and width, especially when rolling silicon steel, requires 10-15 minutes of guide ruler replacement time per cycle, increasing the overall frequency of guide ruler replacement and raising costs.

[0003] Therefore, it is of great significance to prevent wax buildup on the guide ruler, coil defects, and steel jamming accidents that occur under the same guide ruler pressure control for different steel grades, reduce the frequency and time of guide ruler replacement, improve rolling stability, and reduce costs.

[0004] In view of this, the present invention provides a pressure control method for hot rolling coiling guide. Summary of the Invention

[0005] To address the aforementioned shortcomings, this invention provides a pressure control method for hot-rolled coiling guides. The invention primarily utilizes optimized and improved data structures in a secondary model, expanding the data structure and adding guide pressure parameter data variables to the set structure. Secondly, by modifying the coiling model program, the model program performs layer-by-layer calculations based on steel grade, thickness, and width. In the communication program, the data is transmitted to the primary stage via a memory-image network address according to the model data structure. The primary stage program modification is to change the original fixed guide pressure calculation method to a layer-by-layer method based on the secondary stage, allowing for differentiated calculations after transmission to the primary stage. This enables the application of corresponding guide pressures to different steel grades, thereby avoiding problems such as strip edge cracks and wax buildup, and reducing the need to replace guides when the rolled steel grade changes, saving time and improving productivity.

[0006] The technical means employed in this invention are as follows:

[0007] This invention provides a pressure control method for hot-rolled coiling guides, comprising:

[0008] Obtain the layer number of the product to be rolled;

[0009] Add guide ruler pressure parameter data variables according to the layer number. The guide ruler pressure parameter data variables include N sets of data, where N is an integer and N≥1.

[0010] Based on the operating conditions of the winding machines, the N sets of data are allocated to the N winding machines accordingly;

[0011] The product to be rolled is input into the i-th coiler. Based on the data allocated by the i-th coiler and the parameter information of the product to be rolled, the guide pressure of the i-th coiler is calculated, where i is an integer and 1≤i≤N.

[0012] Preferably, the layer number of the product to be rolled is a three-dimensional array consisting of the steel grade, thickness, and width of the product to be rolled.

[0013] Preferably, the guide ruler pressure parameter data variable is integer data, floating-point data, or character data.

[0014] Preferably, the parameter information of the product to be rolled includes: the thickness, width, length and density of the product to be rolled.

[0015] Preferably, the guide pressure of the i-th coiler is calculated based on the data allocated by the i-th coiler and the parameter information of the product to be rolled, in the following manner:

[0016] F i = (h×10) -3 ×w×10 -3 ×l×ρ×g / 100+C1)×C2×D i

[0017] Among them, F i Let h be the guide pressure of the i-th coiler (in hundreds of N), h be the thickness of the product to be rolled (in mm), w be the width of the product to be rolled (in mm), l be the length of the product to be rolled (in m), and ρ be the density of the product to be rolled (in kg / m³). 3 g is a physical constant of 9.8 N / kg, C1 is the first constant, C1∈(100,1000), C2 is the second constant, C2∈(0.1-20), D i The data allocated to the i-th winding machine, D i ∈(0.01-2).

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. The present invention provides a pressure control method for hot-rolled coiling guide rulers, which solves problems such as waxing on guide rulers, coil defects, and steel jamming accidents that occur under the same guide ruler pressure control for different steel grades.

[0020] 2. The present invention provides a pressure control method for hot rolling coiling guides, which reduces the need to replace guides when the rolled steel grade changes, reduces downtime, saves costs, and improves productivity. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic flowchart of a pressure control method for a hot-rolled coiling guide provided by the present invention. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0025] Reference Figure 1 , Figure 1 This is a flowchart illustrating a pressure control method for a hot-rolled coiling guide provided by the present invention, to illustrate a specific embodiment of the pressure control method for a hot-rolled coiling guide provided by the present invention, including:

[0026] Obtain the layer number of the product to be rolled;

[0027] Add guide gauge pressure parameter data variables according to the layer number. The guide gauge pressure parameter data variables include N sets of data, where N is an integer and N≥1.

[0028] Based on the operating conditions of the winding machines, N sets of data are allocated to N winding machines.

[0029] Input the product to be rolled into the i-th coiler. Calculate the guide pressure of the i-th coiler based on the data allocated by the i-th coiler and the parameter information of the product to be rolled, where i is an integer and 1≤i≤N.

[0030] Understandably, this invention optimizes and improves the data structure in the secondary model, expanding the data structure and adding guide pressure parameter data variables to the set structure. Secondly, it modifies the coiling model program to perform layer-by-layer calculations based on steel grade, thickness, and width. In the communication program, the data is transmitted to the primary stage via a memory-image network address according to the model data structure. The primary stage program modification is to change the original fixed guide pressure calculation method to a layer-by-layer method based on the secondary stage, allowing for differentiated calculations after transmission to the primary stage. This enables the application of corresponding guide pressures to different steel grades, thereby avoiding problems such as strip edge cracks and wax buildup, reducing the need to replace guides when rolling different steel grades, saving time, and improving productivity.

[0031] Specifically, using the pressure control method for hot-rolled coiling guides provided in this embodiment, the wax coating rate of silicon steel has decreased from 95% to 5%, a reduction of 90%. Issues such as edge cracks and burr indentation causing defective or scrap products have been resolved. The replacement frequency of coiling guides has significantly decreased, by 90% compared to existing technologies. There is no longer time for stopping rolling and grinding guides during the silicon steel rolling cycle, resulting in a substantial reduction in spare parts costs. After improving the quality of the strip edge, the strip shape in front of the coiler is normal, and there are no abnormalities such as flying, warping, or breakage in front of the coiler, reducing the accident rate and increasing output. Statistics show that in 2022, 150,000 tons of silicon steel were rolled, with 800 tons rolled per cycle for a total of 200 cycles. Previously, three coiling guides had to be replaced after each cycle, taking 10 minutes each time. With the pressure control method for hot-rolled coiling guides provided in this embodiment, it is no longer necessary to specifically replace the guides after rolling silicon steel.

[0032] In some optional embodiments, the layer number of the product to be rolled is a three-dimensional array consisting of the steel grade, thickness, and width of the product to be rolled.

[0033] In some optional embodiments, the guide gauge pressure parameter data variable is integer data, floating-point data, or character data.

[0034] Understandably, Table 1 shows the guide pressure parameters for the No. 1 coiler for silicon steel, but it is not limited to these parameters.

[0035] The silicon steel is known to have 13 layers, 6 thickness layers, and 2-5 width layers. The guide pressure coefficient is set to 25 to prevent wax from adhering to the guide during the rolling of silicon steel and to avoid the risk of steel jamming.

[0036] Table 1. Guide ruler pressure parameters for silicon steel coilers No. 1, 2, and 3.

[0037]

[0038] Table 2. Guide ruler pressure parameters for coilers No. 1, 2, and 3 for other steel grades

[0039]

[0040] In some alternative embodiments, the parameter information of the product to be rolled includes: the thickness, width, length and density of the product to be rolled.

[0041] In some optional embodiments, the guide pressure of the i-th coiler is calculated based on the data allocated to the i-th coiler and the parameter information of the product to be rolled, in the following manner:

[0042] F i = (h×10) -3 ×w×10 -3 ×l×ρ×g / 100+C1)×C2×D i

[0043] Among them, F i Let h be the guide pressure of the i-th coiler (in hundreds of N), h be the thickness of the product to be rolled (in mm), w be the width of the product to be rolled (in mm), l be the length of the product to be rolled (in m), and ρ be the density of the product to be rolled (in kg / m³). 3 g is a physical constant of 9.8 N / kg, C1 is the first constant, C1∈(100,1000)-unit N, C2 is the second constant, C2∈(0.1-20), D i The data allocated to the i-th winding machine, D i ∈(0.01-2).

[0044] It should be noted that the guide pressure in the existing technology is calculated in the following way:

[0045] F=(h×10 -3 ×w×10 -3 ×l×ρ×g / 100+C1)×C2×C3

[0046] Where F is the guide pressure in hundreds of N, C1 is the first constant, C1∈(100,1000) in N, C2 is the second constant, C2∈(0.1-20), and C3 is the third constant, C3∈(0.1-30).

[0047] Comparative experiments were conducted using the method of this invention and existing technologies, and the changes in the silicon steel guide ruler were obtained as shown in Table 3.

[0048] Table 3. Comparison of test results between the method of the present invention and the prior art

[0049]

[0050] As shown in Table 3, the method in this embodiment takes into account the working conditions of different coilers and adjusts the guide pressure according to the parameter information of the product to be rolled, thereby effectively solving problems such as guide waxing, coil defects, and steel jamming accidents that occur under the same guide pressure control for different steel grades.

[0051] For variations in guide gauges of other steel grades and specifications, please refer to Table 4:

[0052] Table 4. Comparison of test results between the method of the present invention and the prior art

[0053]

[0054] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0055] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pressure control method for a hot-rolled coil guide, characterized in that, include: Obtain the layer number of the product to be rolled; Add guide ruler pressure parameter data variables according to the layer number. The guide ruler pressure parameter data variables include N sets of data, where N is an integer and N≥1. Based on the operating conditions of the winding machines, the N sets of data are allocated to the N winding machines accordingly; The product to be rolled is input into the i-th coiler. Based on the data allocated by the i-th coiler and the parameter information of the product to be rolled, the guide pressure of the i-th coiler is calculated, where i is an integer and 1≤i≤N. Based on the data allocated to the i-th coiler and the parameter information of the product to be rolled, the guide pressure of the i-th coiler is calculated in the following manner: F i =( h × w × l ×ρ×C1 / C2+C3)×C5× D i in, F i The guide pressure of the i-th winding machine is... h The thickness of the product to be rolled. w The width of the product to be rolled. l Let ρ be the length of the product to be rolled, ρ be the density of the product to be rolled, C1 be a first constant, C2 be a second constant, C3 be a third constant, and C5 be a fifth constant. D i The data allocated to the i-th winding machine.

2. The pressure control method for a hot-rolled coiling guide according to claim 1, characterized in that, The layer number of the product to be rolled is a three-dimensional array consisting of the steel grade, thickness, and width of the product to be rolled.

3. The pressure control method for a hot-rolled coiling guide according to claim 1 or 2, characterized in that, The guide gauge pressure parameter data variables can be integer data, floating-point data, or character data.

4. The pressure control method for a hot-rolled coiling guide according to claim 1, characterized in that, The parameter information of the product to be rolled includes: the thickness, width, length and density of the product to be rolled.

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