Production control method, device and equipment for strip steel production line

Abstract

The invention discloses a production control method, device and equipment for a strip steel production line, the strip steel production line comprises a temper mill and a withdrawal and straightening machine, and the method comprises the steps that the actual tension of the temper mill is obtained; based on the actual tension and the set tension of the temper mill, the detected tension deviation of the temper mill is determined; if the detected tension deviation of the temper mill is within a preset first tension deviation range, first early warning information is output; if the detected tension deviation of the temper mill is within a preset second tension deviation range and the duration is larger than a first duration threshold value, first alarm information is output, a roll gap between the temper mill and the withdrawal and straightening machine is controlled to be opened, and the lower limit value of the second tension deviation range is larger than the upper limit value of the first tension deviation range. The technical problem that the production efficiency of a strip steel production line is low is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal processing, and particularly relates to a production control method, device and equipment for a strip production line. Background Art

[0002] The skin pass mill plays a crucial role in the metal processing industry, especially in steel production. Its main function is to further level and finish the rolled metal materials (such as strips, sheets, etc.) to improve the surface quality, dimensional accuracy and flatness of the products. Specifically, the functions of the skin pass mill can be summarized as follows: improving the surface quality, enhancing the dimensional accuracy, and strengthening the material properties. During the leveling process, certain plastic deformation will occur to the metal material, which helps to improve the mechanical properties of the material, such as increasing the yield strength, tensile strength and toughness. At the same time, leveling can also eliminate the residual stress inside the material and improve the overall performance of the material.

[0003] However, during the use of the skin pass mill in the strip production line, the strip on the skin pass mill is prone to breakage, resulting in a long downtime for maintenance and low production efficiency of the strip production line. Summary of the Invention

[0004] The embodiments of the present invention provide a production control method, device and equipment for a strip production line, which solve the technical problem of low production efficiency of the strip production line.

[0005] In a first aspect, the embodiments of the present invention provide a production control method for a strip production line, characterized in that the strip production line includes a skin pass mill and a tension leveling machine, and the method includes: obtaining the actual tension of the skin pass mill; determining the detected tension deviation of the skin pass mill based on the actual tension and the set tension of the skin pass mill; if the detected tension deviation of the skin pass mill is within a preset first tension deviation range, outputting a first warning message; if the detected tension deviation of the skin pass mill is within a preset second tension deviation range and the continuous duration is greater than a first duration threshold, outputting a first alarm message and controlling the roll gaps of the skin pass mill and the tension leveling machine to open, wherein the lower limit value of the second tension deviation range is greater than the upper limit value of the first tension deviation range.

[0006] In combination with the first aspect of the present invention, in some embodiments, the actual tension of the skin pass mill includes the actual tension at the outlet of the skin pass mill, and the set tension of the skin pass mill includes the set tension at the outlet of the skin pass mill; determining the detected tension deviation of the skin pass mill based on the actual tension and the set tension of the skin pass mill includes: taking the absolute value of the difference between the actual tension at the outlet of the skin pass mill and the set tension at the outlet of the skin pass mill as a first value; taking the quotient of the first value and the set tension at the outlet of the skin pass mill as a second value; determining the detected tension deviation at the outlet of the skin pass mill based on the second value; wherein, the detected tension deviation of the skin pass mill includes the detected tension deviation at the outlet of the skin pass mill.

[0007] In combination with the first aspect of the present invention, in some embodiments, the second tension deviation range includes the preset tension deviation range at the outlet of the skin pass mill; the method further includes: if the detected tension deviation at the outlet of the skin pass mill is within the tension deviation range at the outlet of the skin pass mill, determining that the detected tension deviation of the skin pass mill is within the second tension deviation range.

[0008] In combination with the first aspect of the present invention, in some embodiments, the actual tension of the skin pass mill further includes the actual tension at the inlet of the skin pass mill, the set tension of the skin pass mill further includes the set tension at the inlet of the skin pass mill, the detected tension deviation of the skin pass mill further includes the detected tension deviation at the inlet of the skin pass mill, and the second tension deviation range further includes the preset tension deviation range at the inlet of the skin pass mill; the method further includes: if the detected tension deviation at the inlet of the skin pass mill is within the tension deviation range at the inlet of the skin pass mill, determining that the detected tension deviation of the skin pass mill is within the second tension deviation range; wherein, the lower limit value of the tension deviation range at the inlet of the skin pass mill is greater than the lower limit value of the tension deviation range at the outlet of the skin pass mill.

[0009] In combination with the first aspect of the present invention, in some embodiments, it further includes: obtaining the rolling force on the drive side and the rolling force on the operator side of the skin pass mill; determining the rolling force deviation of the skin pass mill based on the rolling force on the drive side and the rolling force on the operator side of the skin pass mill; if the rolling force deviation of the skin pass mill is within a preset first rolling force deviation range, outputting a second warning message; if the rolling force deviation of the skin pass mill is within a preset second rolling force deviation range and the continuous duration is greater than a second duration threshold, outputting a second alarm message and controlling the roll gaps of the skin pass mill and the tension leveller to open, wherein the lower limit value of the second rolling force deviation range is greater than the upper limit value of the first rolling force deviation range.

[0010] In combination with the first aspect of the present invention, in some embodiments, it further includes: obtaining the actual torque of the upper support roll and the actual torque of the lower support roll of the planishing mill; taking the quotient of the actual torque of the upper support roll and the rated torque of the upper support roll as the torque output rate of the upper support roll; taking the quotient of the actual torque of the lower support roll and the rated torque of the lower support roll as the torque output rate of the lower support roll; if the torque output rate of the upper support roll and / or the lower support roll is within a preset first output rate range, outputting a third warning message; if the torque output rate of the upper support roll and / or the lower support roll is within a preset second output rate range and the duration is greater than a third duration threshold, outputting a third alarm message and controlling the roll gap of the planishing mill to open, where the lower limit value of the second output rate range is greater than the upper limit value of the first output rate range.

[0011] In combination with the first aspect of the present invention, in some embodiments, it further includes: determining the torque deviation between the upper support roll and the lower support roll based on the actual torque of the upper support roll and the actual torque of the lower support roll; if the torque deviation between the upper support roll and the lower support roll is within a preset first torque deviation range, outputting a fourth warning message; if the torque deviation between the upper support roll and the lower support roll is within a preset second torque deviation range and the duration is greater than a fourth duration threshold, outputting a fourth alarm message and controlling the roll gap of the planishing mill to open, where the lower limit value of the second torque deviation range is greater than the upper limit value of the first torque deviation range.

[0012] In combination with the first aspect of the present invention, in some embodiments, it further includes: obtaining the deviation amount of the strip steel on the planishing mill; if the deviation amount of the strip steel on the planishing mill is within a preset first deviation amount range, outputting a fifth warning message; if the deviation amount of the strip steel on the planishing mill is within a preset second deviation amount range and the duration is greater than a fifth duration threshold, outputting a fifth alarm message and controlling the roll gap of the planishing mill to open, where the lower limit value of the second deviation amount range is greater than the upper limit value of the first deviation amount range.

[0013] Second aspect, an embodiment of the present invention provides a production control device for a strip production line. The strip production line includes a temper mill and a tension leveling machine. The device includes: a tension acquisition unit for acquiring the actual tension of the temper mill; a tension deviation determination unit for determining the detected tension deviation of the temper mill based on the actual tension and the set tension of the temper mill; a first warning unit for outputting a first warning message if the detected tension deviation of the temper mill is within a preset first tension deviation range; a roll gap control unit for outputting a first alarm message and controlling the roll gaps of the temper mill and the tension leveling machine to open if the detected tension deviation of the temper mill is within a preset second tension deviation range and the duration is greater than a first duration threshold, and a lower limit value of the second tension deviation range is greater than an upper limit value of the first tension deviation range.

[0014] Third aspect, an embodiment of the present invention provides an electronic device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the method described in any item of the first aspect is implemented.

[0015] One or more technical solutions provided by the embodiments of the present invention at least achieve the following technical effects or advantages:

[0016] In the embodiment of the present invention, the actual tension of the temper mill is acquired; the detected tension deviation of the temper mill is determined based on the actual tension and the set tension of the temper mill; a first warning message is output if the detected tension deviation of the temper mill is within a preset first tension deviation range; a first alarm message is output and the roll gaps of the temper mill and the tension leveling machine are controlled to open if the detected tension deviation of the temper mill is within a preset second tension deviation range and the duration is greater than a first duration threshold, and a lower limit value of the second tension deviation range is greater than an upper limit value of the first tension deviation range. The detected tension deviation of the temper mill being within the preset second tension deviation range indicates a relatively high risk of strip breakage on the temper mill. For example, when the excessive tension causes the detected tension deviation of the temper mill to be within the second tension deviation range, the strip may break due to being unable to withstand the excessive tensile force. At this time, controlling the roll gaps of the temper mill and the tension leveling machine to open reduces the tensile force borne by the strip, thereby avoiding the situation of strip breakage on the temper mill and further avoiding shutdown for maintenance. Therefore, the production efficiency of the strip production line is improved. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a flowchart of the production control method for the strip steel production line in the embodiment of the present invention;

[0019] Figure 2 It is a functional module diagram of the production control device for the strip steel production line in the embodiment of the present invention;

[0020] Figure 3 It is a schematic structural diagram of the electronic device in the embodiment of the present invention. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0022] In the present invention, descriptions such as "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] The embodiment of the present invention provides a production control method for a strip steel production line. The strip steel production line includes a temper mill and a tension leveling machine. Refer to Figure 1 As shown, the method includes the following steps S101 to S104:

[0024] S101: Obtain the actual tension of the temper mill.

[0025] S102: Determine the detected tension deviation of the temper mill based on the actual tension and the set tension of the temper mill.

[0026] In some embodiments, the actual tension of the temper mill includes the actual tension at the outlet of the temper mill, and the set tension of the temper mill includes the set tension at the outlet of the temper mill; step S102 may include: taking the absolute value of the difference between the actual tension at the outlet of the temper mill and the set tension at the outlet of the temper mill as a first value; taking the quotient of the first value and the set tension at the outlet of the temper mill as a second value; determining the detected tension deviation at the outlet of the temper mill based on the second value; wherein, the detected tension deviation of the temper mill includes the detected tension deviation at the outlet of the temper mill. Among them, determining the detected tension deviation at the outlet of the temper mill based on the second value may be: taking the product of the second value and 100% as the detected tension deviation at the outlet of the temper mill.

[0027] In some embodiments, the actual tension of the temper mill further includes the actual tension at the inlet of the temper mill, and the set tension of the temper mill further includes the set tension at the inlet of the temper mill; step S102 may further include: taking the absolute value of the difference between the actual tension at the inlet of the temper mill and the set tension at the inlet of the temper mill as a third value; taking the quotient of the third value and the set tension at the inlet of the temper mill as a fourth value; determining the detected tension deviation at the inlet of the temper mill based on the fourth value; wherein, the detected tension deviation of the temper mill further includes the detected tension deviation at the inlet of the temper mill. Among them, determining the detected tension deviation at the inlet of the temper mill based on the fourth value may be: taking the product of the fourth value and 100% as the detected tension deviation at the inlet of the temper mill.

[0028] S103: If the detected tension deviation of the temper mill is within a preset first tension deviation range, output a first warning message.

[0029] It should be noted that the detected tension deviation of the temper mill being within the preset first tension deviation range indicates that there is a risk of strip breakage on the temper mill and the risk is relatively small. It should also be noted that when the detected tension deviation of the temper mill is within the preset first tension deviation range, outputting the first warning message can timely remind the on-site personnel to perform relevant operations to reduce the tension deviation, avoid the detected tension deviation of the temper mill from expanding to the second tension deviation range, thus avoiding the roll gaps of the temper mill and the tension leveling machine from opening, reducing the interference to the strip production line, and further improving the production efficiency of the strip production line.

[0030] It should be noted that the first tension deviation range may include the first tension deviation range at the inlet of the temper mill and the first tension deviation range at the outlet of the temper mill. The first tension deviation range at the inlet of the temper mill may be a tension deviation range greater than or equal to 10%, and the first tension deviation range at the outlet of the temper mill may be a tension deviation range greater than or equal to 6%.

[0031] S104: If the detected tension deviation of the temper mill is within a preset second tension deviation range and the duration is greater than a first duration threshold, output a first alarm message and control the roll gaps of the temper mill and the tension leveller to open. The lower limit value of the second tension deviation range is greater than the upper limit value of the first tension deviation range.

[0032] It should be noted that the detected tension deviation of the temper mill being within the preset second tension deviation range indicates a relatively high risk of strip breakage on the temper mill. The first duration threshold can be 0.5 seconds, 0.4 seconds, etc.

[0033] It should be noted that in the case of accidental errors in tension detection, it may lead to incorrect data of the detected tension deviation of the temper mill, and further lead to misjudging that the detected tension deviation of the temper mill is within the preset second tension deviation range. Therefore, the embodiments of the present invention also limit that it is necessary to satisfy that the duration is greater than the first duration threshold, avoiding misjudgment caused by accidental errors in tension detection, and thus improving the accuracy of the assessment of the strip breakage risk.

[0034] In some embodiments, the second tension deviation range may include a preset tension deviation range at the outlet of the temper mill; the method may further include: if the detected tension deviation at the outlet of the temper mill is within the tension deviation range at the outlet of the temper mill, determine that the detected tension deviation of the temper mill is within the second tension deviation range.

[0035] It should be noted that when the tension is too small, it may not be able to effectively maintain the stability of the strip during rolling, and the phenomenon of tension loss is likely to occur. Once the tension loss occurs, the strip may accumulate or jam due to the loss of tension support, thereby triggering a strip break. When the tension is too large, the strip may break due to being unable to withstand the excessive tensile force. After the temper mill processes the strip, the thickness of the strip at the outlet of the temper mill is smaller than that at the inlet of the temper mill, and the tension deviation is more likely to cause the thin strip to break, that is, the tension deviation is more likely to cause the strip at the outlet of the temper mill to break. Therefore, directly evaluating the strip breakage risk based on the detected tension deviation at the outlet of the temper mill reduces the amount of calculation and improves the accuracy of the assessment of the strip breakage risk.

[0036] In some embodiments, the second tension deviation range may further include a preset tension deviation range at the inlet of the temper mill; the method may further include: if the detected tension deviation at the inlet of the temper mill is within the tension deviation range at the inlet of the temper mill, determine that the detected tension deviation of the temper mill is within the second tension deviation range; wherein, the lower limit value of the tension deviation range at the inlet of the temper mill is greater than the lower limit value of the tension deviation range at the outlet of the temper mill.

[0037] It should be noted that if the detected tension deviation at the outlet of the skin pass mill is incorrect due to equipment failure, at this time, it is impossible to judge whether there is a risk of strip breakage based on the detected tension deviation at the outlet of the skin pass mill, and the incorrect data will lead to a low accuracy in the assessment of the strip breakage risk. Therefore, in order to solve this problem, the embodiment of the present invention adds a method for evaluating the strip breakage risk through the detected tension deviation at the inlet of the skin pass mill, realizes the evaluation of the strip breakage risk through diversified technical means, avoids the situation of evaluation errors caused by the failure of a single technical means, and thus improves the accuracy of the evaluation of the strip breakage risk. In addition, since the thickness of the strip at the outlet of the skin pass mill is smaller than that at the inlet of the skin pass mill, the tension deviation is not likely to cause the breakage of the thick strip, that is, the tension deviation is not likely to cause the breakage of the strip at the inlet of the skin pass mill. Therefore, the embodiment of the present invention limits the lower limit value of the tension deviation range at the inlet of the skin pass mill to be greater than the lower limit value of the tension deviation range at the outlet of the skin pass mill, realizes reducing the number of times of opening the roll gap while ensuring a low strip breakage risk, and thus reduces the interference to the strip production line, and further improves the efficiency of the strip production line. Therefore, it realizes taking into account the improvement of the accuracy of the evaluation of the strip breakage risk and the improvement of the efficiency of the strip production line.

[0038] It should be noted that the tension deviation range at the inlet of the skin pass mill can be a tension deviation range greater than or equal to 15%, and the tension deviation range at the outlet of the skin pass mill can be a tension deviation range greater than or equal to 11%.

[0039] In some embodiments, the production control method of the strip production line may further include: obtaining the driving side rolling force and the operating side rolling force of the skin pass mill; determining the rolling force deviation of the skin pass mill based on the driving side rolling force and the operating side rolling force of the skin pass mill; if the rolling force deviation of the skin pass mill is within a preset first rolling force deviation range, outputting a second warning message; if the rolling force deviation of the skin pass mill is within a preset second rolling force deviation range and the continuous duration is greater than a second duration threshold, outputting a second alarm message and controlling the roll gaps of the skin pass mill and the tension leveling machine to open, and the lower limit value of the second rolling force deviation range is greater than the upper limit value of the first rolling force deviation range.

[0040] It should be noted that the rolling force deviation of the skin pass mill may refer to the absolute value of the difference between the driving side rolling force and the operating side rolling force of the skin pass mill. The first rolling force deviation range may be a range between 8t and 13t, and the second rolling force deviation range may be a range greater than or equal to 13t.

[0041] It should be noted that when the rolling force deviation of the temper mill is within the preset first rolling force deviation range, it indicates that there is a risk of strip breakage on the temper mill and the risk is relatively small. When the rolling force deviation of the temper mill is within the preset second rolling force deviation range, it indicates that the risk of strip breakage on the temper mill is relatively large. It should also be noted that when the rolling force deviation of the temper mill is within the preset first rolling force deviation range, the second warning message is output, which can timely remind the on-site personnel to perform relevant operations to reduce the rolling force deviation, avoid the rolling force deviation of the temper mill from expanding to the second rolling force deviation range, thus avoiding the opening of the roll gaps of the temper mill and the tension leveller, reducing the interference to the strip production line, and further improving the production efficiency of the strip production line.

[0042] It should be noted that in the case of accidental errors in rolling force detection, it will lead to errors in the data of the rolling force deviation of the temper mill, and further lead to misjudging that the rolling force deviation of the temper mill is within the preset second rolling force deviation range. Therefore, the embodiment of the present invention defines that it is also necessary to satisfy that the continuous duration is greater than the second duration threshold, which avoids misjudgment caused by accidental errors in rolling force detection, and further improves the accuracy of the evaluation of the strip breakage risk.

[0043] In some embodiments, the production control method of the strip production line may further include: obtaining the actual torque of the upper backup roll and the actual torque of the lower backup roll of the temper mill; taking the quotient of the actual torque of the upper backup roll and the rated torque of the upper backup roll as the torque output rate of the upper backup roll; taking the quotient of the actual torque of the lower backup roll and the rated torque of the lower backup roll as the torque output rate of the lower backup roll; if the torque output rate of the upper backup roll and / or the lower backup roll is within the preset first output rate range, output the third warning message; if the torque output rate of the upper backup roll and / or the lower backup roll is within the preset second output rate range and the continuous duration is greater than the third duration threshold, output the third alarm message and control the opening of the roll gap of the temper mill, and the lower limit value of the second output rate range is greater than the upper limit value of the first output rate range.

[0044] It should be noted that the third duration threshold may be 2 seconds, the first output rate range may be (50%, 90%], and the second output rate range may be (90%, 100%]. When the torque output rate of the upper backup roll and / or the lower backup roll is within the preset first output rate range, it indicates that there is a risk of strip breakage on the temper mill and the risk is relatively small. When the torque output rate of the upper backup roll and / or the lower backup roll is within the preset second output rate range, it indicates that the risk of strip breakage on the temper mill is relatively large. In addition, in the case of jamming of the upper backup roll and / or the lower backup roll, the torque output rate of the upper backup roll and / or the lower backup roll will increase.

[0045] In some embodiments, the production control method of the strip production line may further include: determining the torque deviation between the upper backup roll and the lower backup roll based on the actual torque of the upper backup roll and the actual torque of the lower backup roll; if the torque deviation between the upper backup roll and the lower backup roll is within a preset first torque deviation range, outputting a fourth warning message; if the torque deviation between the upper backup roll and the lower backup roll is within a preset second torque deviation range and the continuous duration is greater than a fourth duration threshold, outputting a fourth alarm message and controlling the roll gap of the temper mill to open, wherein the lower limit value of the second torque deviation range is greater than the upper limit value of the first torque deviation range.

[0046] It should be noted that the torque deviation between the upper backup roll and the lower backup roll being within the preset first torque deviation range indicates that there is a risk of strip breakage on the temper mill and the risk is relatively small. The torque deviation between the upper backup roll and the lower backup roll being within the preset second torque deviation range indicates that the risk of strip breakage on the temper mill is relatively large.

[0047] In some embodiments, the production control method of the strip production line may further include: obtaining the deviation amount of the strip on the temper mill; if the deviation amount of the strip on the temper mill is within a preset first deviation amount range, outputting a fifth warning message; if the deviation amount of the strip on the temper mill is within a preset second deviation amount range and the continuous duration is greater than a fifth duration threshold, outputting a fifth alarm message and controlling the roll gap of the temper mill to open, wherein the lower limit value of the second deviation amount range is greater than the upper limit value of the first deviation amount range.

[0048] It should be noted that the first deviation amount range may be a range exceeding ±30 mm, and the second deviation amount range may be a range exceeding ±40 mm. The deviation amount of the strip on the temper mill being within the preset first deviation amount range indicates that there is a risk of strip breakage on the temper mill and the risk is relatively small. The deviation amount of the strip on the temper mill being within the preset second deviation amount range indicates that the risk of strip breakage on the temper mill is relatively large.

[0049] It should be noted that the embodiments of the present invention combine tension, rolling force, torque, and deviation amount to evaluate the risk of strip breakage, achieving the evaluation of the risk of strip breakage through diversified technical means, avoiding the situation of evaluation errors caused by the failure of a single technical means, and thus improving the evaluation accuracy of the risk of strip breakage.

[0050] The above are only the embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

[0051] In some embodiments, before controlling the roll gaps of the skin pass mill and the tension leveling machine to open, the production control method of the strip steel production line may further include: obtaining the running speed of the strip steel and the rolling force of the skin pass mill; if the running speed of the strip steel is greater than a preset speed threshold and the rolling force of the skin pass mill is greater than a preset rolling force threshold, allowing the control of the roll gaps of the skin pass mill and the tension leveling machine to open.

[0052] It should be noted that the running speed of the strip steel being greater than the preset speed threshold and the rolling force of the skin pass mill being greater than the preset rolling force threshold indicate that the strip steel production line is in an operating state. The preset speed threshold may be 0 m / min, and the preset rolling force threshold may be 0 t.

[0053] It should be noted that in the embodiments of the present invention, early warnings of parameters such as the tension, rolling force, and torque of the skin pass mill are combined, as well as the control strategies for the quick stop and quick opening of the skin pass mill. In case of an abnormal situation, the roll gap is opened immediately to avoid strip breakage accidents. In addition, the roll gap is not opened within 10 m before and after the original weld of the strip steel. When outputting the early warning information, it can be a pop-up window flashing warning above the skin pass mill on the process main interface. When outputting the alarm information, it can be a pop-up window flashing alarm above the skin pass mill on the process main interface. During the evaluation process of the strip breakage risk of the strip steel, if the hydraulic cylinder is in the position control or calibration mode, the risk can also be evaluated by whether the inclination of the HGC cylinder is greater than 3 mm. In the practical application of the embodiments of the present invention, the number of strip breakages of the skin pass mill is reduced from 3 times per year to 0. Calculating the benefits according to 4 hours of parking each time and 50 tons of defective products produced each time, the operating benefit: the hourly output is 50 tons, the benefit per ton of steel is 300 yuan, 3 times per year, and 4 hours of parking each time. The benefit

[0054] = 50 * 300 * 3 * 4 * 12 = 2.16 million. The benefit of defective products: 50 tons of defective products are produced each time, the benefit per ton of steel is 300 yuan, 3 times per year, and the benefit = 50 * 300 * 3 * 12 = 540,000 yuan. The total benefit = 2.16 + 0.54 = 2.7 million.

[0055] In an embodiment of the present invention, the actual tension of the temper mill is obtained; based on the actual tension and the set tension of the temper mill, the detected tension deviation of the temper mill is determined; if the detected tension deviation of the temper mill is within a preset first tension deviation range, a first warning message is output; if the detected tension deviation of the temper mill is within a preset second tension deviation range and the duration is greater than a first duration threshold, a first alarm message is output, and the roll gaps of the temper mill and the tension leveller are controlled to open, and the lower limit value of the second tension deviation range is greater than the upper limit value of the first tension deviation range. The detected tension deviation of the temper mill being within the preset second tension deviation range indicates a relatively high risk of strip breakage on the temper mill. For example, when the detected tension deviation of the temper mill is within the second tension deviation range due to excessive tension, the strip may break due to being unable to withstand the excessive tensile force. At this time, controlling the roll gaps of the temper mill and the tension leveller to open reduces the tensile force borne by the strip, thus avoiding the situation of strip breakage on the temper mill and further avoiding shutdown for maintenance. Therefore, the production efficiency of the strip production line is improved.

[0056] Based on the same inventive concept, as shown in Figure 2 In an embodiment of the present invention, a production control device 10 for a strip production line is provided. The strip production line includes a temper mill and a tension leveller. The production control device 10 of the strip production line includes: a tension acquisition unit 110 for acquiring the actual tension of the temper mill; a tension deviation determination unit 120 for determining the detected tension deviation of the temper mill based on the actual tension and the set tension of the temper mill; a first warning unit 130 for outputting a first warning message if the detected tension deviation of the temper mill is within a preset first tension deviation range; a roll gap control unit 140 for outputting a first alarm message and controlling the roll gaps of the temper mill and the tension leveller to open if the detected tension deviation of the temper mill is within a preset second tension deviation range and the duration is greater than a first duration threshold, and the lower limit value of the second tension deviation range is greater than the upper limit value of the first tension deviation range.

[0057] It can be understood that the actual tension of the temper mill includes the actual tension at the outlet of the temper mill, and the set tension of the temper mill includes the set tension at the outlet of the temper mill; the tension deviation determination unit 120 is specifically configured to: take the absolute value of the difference between the actual tension at the outlet of the temper mill and the set tension at the outlet of the temper mill as a first value; take the quotient of the first value and the set tension at the outlet of the temper mill as a second value; determine the detected tension deviation at the outlet of the temper mill based on the second value; wherein, the detected tension deviation of the temper mill includes the detected tension deviation at the outlet of the temper mill.

[0058] It can be understood that the second tension deviation range includes the preset tension deviation range at the exit of the temper mill; the production control device 10 of the strip steel production line further includes: a first determination unit configured to determine that the detected tension deviation of the temper mill is within the second tension deviation range if the detected tension deviation at the exit of the temper mill is within the tension deviation range at the exit of the temper mill.

[0059] It can be understood that the actual tension of the temper mill further includes the actual tension at the inlet of the temper mill, the set tension of the temper mill further includes the set tension at the inlet of the temper mill, the detected tension deviation of the temper mill further includes the detected tension deviation at the inlet of the temper mill, and the second tension deviation range further includes the preset tension deviation range at the inlet of the temper mill; the production control device 10 of the strip steel production line further includes: a second determination unit configured to determine that the detected tension deviation of the temper mill is within the second tension deviation range if the detected tension deviation at the inlet of the temper mill is within the tension deviation range at the inlet of the temper mill; wherein, the lower limit value of the tension deviation range at the inlet of the temper mill is greater than the lower limit value of the tension deviation range at the exit of the temper mill.

[0060] It can be understood that the production control device 10 of the strip steel production line further includes: a rolling force processing unit configured to obtain the driving side rolling force and the operating side rolling force of the temper mill; determine the rolling force deviation of the temper mill based on the driving side rolling force and the operating side rolling force of the temper mill; output a second warning message if the rolling force deviation of the temper mill is within the preset first rolling force deviation range; output a second alarm message and control the roll gaps of the temper mill and the tension leveling machine to open if the rolling force deviation of the temper mill is within the preset second rolling force deviation range and the continuous duration is greater than the second duration threshold, and the lower limit value of the second rolling force deviation range is greater than the upper limit value of the first rolling force deviation range.

[0061] It can be understood that the production control device 10 of the strip steel production line further includes: a first torque processing unit configured to obtain the actual torque of the upper backup roll and the actual torque of the lower backup roll of the temper mill; use the quotient of the actual torque of the upper backup roll and the rated torque of the upper backup roll as the torque output ratio of the upper backup roll; use the quotient of the actual torque of the lower backup roll and the rated torque of the lower backup roll as the torque output ratio of the lower backup roll; output a third warning message if the torque output ratio of the upper backup roll and / or the lower backup roll is within the preset first output ratio range; output a third alarm message and control the roll gap of the temper mill to open if the torque output ratio of the upper backup roll and / or the lower backup roll is within the preset second output ratio range and the continuous duration is greater than the third duration threshold, and the lower limit value of the second output ratio range is greater than the upper limit value of the first output ratio range.

[0062] It can be understood that the production control device 10 of the strip production line further includes: a second torque processing unit, configured to determine the torque deviation between the upper backup roll and the lower backup roll based on the actual torque of the upper backup roll and the actual torque of the lower backup roll; if the torque deviation between the upper backup roll and the lower backup roll is within a preset first torque deviation range, output a fourth warning message; if the torque deviation between the upper backup roll and the lower backup roll is within a preset second torque deviation range and the continuous duration is greater than a fourth duration threshold, output a fourth alarm message and control the roll gap of the temper mill to open, where the lower limit value of the second torque deviation range is greater than the upper limit value of the first torque deviation range.

[0063] It can be understood that the production control device 10 of the strip production line further includes: a deviation amount processing unit, configured to obtain the deviation amount of the strip on the temper mill; if the deviation amount of the strip on the temper mill is within a preset first deviation amount range, output a fifth warning message; if the deviation amount of the strip on the temper mill is within a preset second deviation amount range and the continuous duration is greater than a fifth duration threshold, output a fifth alarm message and control the roll gap of the temper mill to open, where the lower limit value of the second deviation amount range is greater than the upper limit value of the first deviation amount range.

[0064] It should be understood that more implementation details of the production control device 10 of the strip production line in the embodiments of the present invention are referred to the production control method of the strip production line described above. For the sake of simplicity of the specification, they will not be elaborated here.

[0065] Based on the same inventive concept, an embodiment of the present invention further provides an electronic device, as Figure 3 shown, including a memory 304, a processor 302, and a computer program stored on the memory 304 and executable on the processor 302. The processor 302 executes the program to implement the steps of any implementation manner of the production control method embodiment of the strip production line.

[0066] Among them, in Figure 3 , the bus architecture (represented by bus 300), the bus 300 may include any number of interconnected buses and bridges. The bus 300 links various circuits including one or more processors represented by the processor 302 and a memory represented by the memory 304 together. The bus 300 can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art. Therefore, they will not be further described herein. The bus interface 305 provides an interface between the bus 300 and the receiver 301 and the transmitter 303. The receiver 301 and the transmitter 303 can be the same element, that is, a transceiver, providing a unit for communicating with various other devices on the transmission medium. The processor 302 is responsible for managing the bus 300 and general processing, and the memory 304 can be used to store data used by the processor 302 when executing operations.

[0067] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted via a computer-readable medium as one or more instructions or code. Other examples and implementations are within the scope and spirit of the present invention and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination thereof. In addition, each functional unit may be integrated in one processing unit, may exist as individual physical units, or two or more units may be integrated in one unit.

[0068] In several embodiments provided in the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are merely illustrative. For example, the division of the units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection to each other can be through some interfaces. The indirect coupling or communication connection of units or modules can be in an electrical or other form.

[0069] The units described as separate components may or may not be physically separated. The components serving as control devices may or may not be physical units, that is, they may be located in one place or distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0070] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: USB flash drives, read-only memory (ROM), random access memory (RAM), mobile hard disks, magnetic disks, or optical discs and other various media that can store program codes.

[0071] The above are only embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A production control method for a strip steel production line, characterized in that: The strip steel production line includes a flattening machine and a tension leveler, and the method includes: Obtaining the actual tension of the leveling machine; Determining a detection tension deviation of the leveling machine based on an actual tension and a set tension of the leveling machine; If the detected tension deviation of the leveling machine is within a preset first tension deviation range, outputting a first warning message; If the detected tension deviation of the leveling machine is within a preset second tension deviation range and lasts for a duration greater than a first duration threshold, a first alarm message is output, and the roller gaps of the leveling machine and the straightening machine are controlled to open, and the lower limit value of the second tension deviation range is greater than the upper limit value of the first tension deviation range.

2. The production control method of a strip steel production line according to claim 1, characterized in that: The actual tension of the leveling machine includes the actual tension at the leveling machine outlet, and the set tension of the leveling machine includes the set tension at the leveling machine outlet; and determining the detection tension deviation of the leveling machine based on the actual tension and the set tension of the leveling machine includes: The absolute value of the difference between the actual tension at the outlet of the leveling machine and the set tension at the outlet of the leveling machine is taken as the first value; The quotient of the first value and the set tension at the leveling machine outlet is taken as the second value; Based on the second value, the detection tension deviation at the outlet of the leveling machine is determined; wherein the detection tension deviation of the leveling machine includes the detection tension deviation at the outlet of the leveling machine.

3. The production control method of a strip steel production line according to claim 2, characterized in that: The second tension deviation range includes a preset tension deviation range at the leveling machine outlet; the method further includes: If the detected tension deviation at the leveling machine outlet is within the tension deviation range at the leveling machine outlet, it is determined that the detected tension deviation of the leveling machine is within the second tension deviation range.

4. The production control method of a strip steel production line according to claim 3, characterized in that: The actual tension of the leveling machine also includes the actual tension at the leveling machine entrance, the set tension of the leveling machine also includes the set tension at the leveling machine entrance, the detected tension deviation of the leveling machine also includes the detected tension deviation at the leveling machine entrance, and the second tension deviation range also includes the preset tension deviation range at the leveling machine entrance; the method further includes: If the detected tension deviation at the entrance of the leveling machine is within the tension deviation range at the entrance of the leveling machine, it is determined that the detected tension deviation of the leveling machine is within the second tension deviation range; wherein the lower limit value of the tension deviation range at the entrance of the leveling machine is greater than the lower limit value of the tension deviation range at the exit of the leveling machine.

5. The production control method of a strip steel production line according to claim 1, characterized in that: Also includes: Obtaining a driving side rolling force and an operating side rolling force of the skin-pass mill; Determining a rolling force deviation of the skin-pass mill based on a driving side rolling force and an operating side rolling force of the skin-pass mill; If the rolling force deviation of the skin-pass mill is within a preset first rolling force deviation range, outputting a second warning message; If the rolling force deviation of the flattening mill is within a preset second rolling force deviation range and lasts for a duration greater than a second duration threshold, a second alarm message is output, and the roll gaps of the flattening mill and the straightening machine are controlled to open, and the lower limit value of the second rolling force deviation range is greater than the upper limit value of the first rolling force deviation range.

6. The production control method of a strip steel production line according to claim 1, characterized in that: Also includes: Obtaining the actual torque of the upper support roller and the actual torque of the lower support roller of the leveling machine; The quotient of the actual torque of the upper support roller and the rated torque of the upper support roller is used as the torque output rate of the upper support roller; the quotient of the actual torque of the lower support roller and the rated torque of the lower support roller is used as the torque output rate of the lower support roller; If the torque output rate of the upper support roller and / or the lower support roller is within a preset first output rate range, outputting a third warning message; If the torque output rate of the upper support roller and / or the lower support roller is within a preset second output rate range and lasts for a duration greater than a third duration threshold, a third alarm message is output and the roller gap of the leveling machine is controlled to open, and the lower limit value of the second output rate range is greater than the upper limit value of the first output rate range.

7. The production control method of a strip steel production line according to claim 6, characterized in that: Also includes: Determining a torque deviation of the upper support roller and the lower support roller based on an actual torque of the upper support roller and an actual torque of the lower support roller; If the torque deviation between the upper support roller and the lower support roller is within a preset first torque deviation range, outputting a fourth warning message; If the torque deviation between the upper support roller and the lower support roller is within a preset second torque deviation range and lasts for a duration greater than a fourth duration threshold, a fourth alarm message is output and the roller gap of the leveling machine is controlled to open, and the lower limit value of the second torque deviation range is greater than the upper limit value of the first torque deviation range.

8. The production control method of a strip steel production line according to claim 1, characterized in that: Also includes: Obtaining the deviation of the strip steel on the flattening machine; If the deviation of the strip steel on the flattening machine is within a preset first deviation range, outputting a fifth warning message; If the deviation of the strip on the leveling machine is within a preset second deviation range and lasts for a duration greater than a fifth duration threshold, a fifth alarm message is output and the roll gap of the leveling machine is controlled to open, and the lower limit value of the second deviation range is greater than the upper limit value of the first deviation range.

9. A production control device for a strip steel production line, characterized in that: The strip steel production line includes a flattening machine and a tension leveler, and the device includes: A tension acquisition unit, used for acquiring the actual tension of the leveling machine; A tension deviation determining unit, configured to determine a detected tension deviation of the leveling machine based on an actual tension and a set tension of the leveling machine; A first warning unit, configured to output a first warning message if the detected tension deviation of the leveling machine is within a preset first tension deviation range; A roll gap control unit is used to output a first alarm message and control the roll gaps of the leveling machine and the straightening machine to open if the detected tension deviation of the leveling machine is within a preset second tension deviation range and lasts for a duration greater than a first duration threshold, and the lower limit value of the second tension deviation range is greater than the upper limit value of the first tension deviation range.

10. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method according to any one of claims 1 to 8 when executing the computer program.

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