A method for controlling the looper tension in a hot continuous rolling accelerated rolling process

Abstract

The application discloses a method for controlling loop tension in a hot continuous rolling speed-up rolling process, and belongs to the technical field of metallurgical automation control. The method comprises the following steps: after a high-temperature detector at the outlet of a finishing rolling unit detects a strip steel, a delay time is set, and the actually measured high-temperature detector data is sampled and locked; the acceleration of the last rack of the finishing rolling unit, the set-through speed of each rack of the finishing rolling unit, and the acceleration of each rack of the finishing rolling unit are determined; the set tension and the set angle of the loop between each rack are determined; after the high-temperature detector value at the outlet of the finishing rolling unit is locked for the delay time, the set tension value of the loop is dynamically corrected according to the actually measured loop angle value between each rack and other data; after the dynamically corrected set tension value of the loop is limited and protected, the value is compensated to the initial set tension of the loop; and after the finishing rolling unit is thrown, the dynamically corrected loop tension compensation value of the strip steel is cleared. The application solves the problem of width narrowing caused by the speed-up rolling and the increase of the finish rolling temperature in the hot continuous rolling.

Description

Technical Field

[0001] This invention belongs to the technical field of metallurgical automation control, specifically relating to a method for controlling the variable tension of the looper during hot continuous rolling with increased speed. Background Technology

[0002] In the field of metal rolling, the looper between finishing mill stands plays a crucial role in adjusting the flow rate between stands. Its tension directly impacts rolling stability and product quality standards. Excessive tension ensures rolling stability but can lead to strip narrowing; conversely, low tension mitigates strip narrowing but reduces rolling stability. Therefore, the proper adjustment of the looper tension between stands is a topic worthy of in-depth study.

[0003] Currently, there is no technology for controlling the variable tension of the looper during the speed-up rolling process in hot continuous rolling mills. However, there are several methods for controlling the variable tension of the looper between stands: 1. (Announcement No.: CN103464472A, titled: Variable Tension Control Method for Improving the Uniformity of the Overall Width of Thin-Gauge Hot-Rolled Stainless Steel), the patent application proposes a calculation method for adjusting the looper tension only based on the final rolling temperature, and a control method that adjusts to constant tension when preset conditions are met during the control process. 2. (Announcement No.: CN113020285B, titled: A Control Method and Device for Variable Gain of Looper), the patent application proposes a variable gain control method applied to continuous casting and rolling equipment based on the strip rolling specifications and strip tracking, used to ensure rolling stability and strip quality. 3. (Announcement No.: CN112122356B, titled: A Control Method for Reducing Strip Width Allowance), the patent application proposes a variable tension setting method combined with the load distribution coefficient of each stand in the finishing mill, which achieves the goal of reducing strip width allowance through automatic looper tensioning in actual control.

[0004] However, due to the increased temperature changes during the speed-up process of the finishing mill, conventional feedback control methods that combine final rolling temperature and strip width deviation cannot effectively solve the above problems. In summary, there is currently a lack of variable tension control methods for the looper during the speed-up process of hot continuous rolling finishing mills in the field of metal rolling. It is possible to effectively correct the set tension of the looper between stands through automated control methods combined with feedforward control concepts, thereby improving the stability of strip during the rolling process and the quality of strip width.

[0005] To address this, we propose a method for controlling the variable tension of the looper during hot continuous rolling with increased speed. Summary of the Invention

[0006] The purpose of this invention is to provide a method for controlling the variable tension of the looper during hot continuous rolling with increased speed, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a method for controlling the variable tension of the looper during hot continuous rolling, comprising:

[0008] S1, the delay time T after the high temperature gauge at the outlet of the finishing mill detects the strip steel. de Sampling and measured high temperature meter data t aem Lock it;

[0009] S2. Specify the acceleration of the last stand of the finishing mill and the set threading speed S for each stand of the finishing mill unit. FX Calculate the acceleration of each stand in the finishing mill;

[0010] S3, Tension setting for loopers between racks TE FX-1 Setting Angle AN FX-1 ;

[0011] S4, Delay time T after the high temperature measurement value of the finishing mill exit is locked av Based on the measured values ​​of the looper angles between each frame, the dynamic correction looper set tension value is calculated.

[0012] S5. After limiting the dynamic correction looper setting tension value, compensate it to the initial looper setting tension.

[0013] S6. After the finishing mill throws out the steel, reset the calculated dynamic correction loop tension compensation value of this strip to zero.

[0014] Preferably, S1 includes: a delay time T after the high-temperature gauge at the outlet of the finishing mill detects the strip steel. de Sampling and measured high temperature meter data t aem Lock it;

[0015] The delay time T after the high temperature gauge at the outlet of the finishing mill detects the strip steel is... de The pyrometer value is sampled and locked, wherein the pyrometer detects the strip after a delay time T. de The given empirical values ​​range from 10 to 500, and the unit is ms.

[0016] Preferably, the high-temperature gauge at the outlet of the finishing mill detects the strip steel and then samples and locks the high-temperature gauge value after a delay time.

[0017] The formula for calculating the pyrometer lockout value is as follows:

[0018]

[0019] Among them, t ave This indicates the temperature lock-in value of the strip head measured by the pyrometer, in °C; t aemThis indicates the real-time temperature of the strip measured by the pyrometer, in °C; TA indicates the controller execution cycle; N indicates the number of sampling points for the strip outlet temperature measured by the pyrometer.

[0020] Preferably, the controller executes a cycle TA and the number of sampling points N for the strip outlet temperature measured by the high temperature gauge;

[0021] The empirical value of the controller execution cycle TA ranges from 1 to 32, and the unit is ms; the empirical value of the number of sampling points N for the strip outlet temperature measured by the pyrometer ranges from 10 to 100.

[0022] Preferably, step S2 includes: specifying the acceleration of the last stand of the finishing mill and setting the threading speed S for each stand of the finishing mill unit. FX Calculate the acceleration of each stand in the finishing mill;

[0023] Based on the acceleration of the last stand and the set threading speed S of each stand in the finishing mill, FX Calculate the acceleration 'a' of the frames following the last frame. FX The calculation formula is:

[0024] a FX-1 = S FX-1 / S FX × a FX

[0025] Among them, a FX S FX In this context, X represents the number of finishing mill units, and the acceleration of the last stand represents a. F8 a FX-1 This indicates the acceleration of the front frame, in m / s². 2 S FX-1 This indicates the set threading speed of the front frame, in m / s; S FX This indicates the set belt threading speed of the rear frame, in m / s; a FX This indicates the acceleration of the rear frame, in m / s². 2 .

[0026] Preferably, step S3 includes: specifying the tension TE of the looper between each frame. FX-1 Setting Angle AN FX-1 ;

[0027] It should be noted that TE FX-1 AN FX-1 In this text, X represents the number of finishing mill units, the set tension of the looper before the last stand is TE7, and the set tension of the looper between each stand is TE. FX-1 The unit is kN, and the set angle AN between the loops of each frame is... FX-1 The unit is °.

[0028] Preferably, S4 includes: a delay time T after the high-temperature meter reading at the finishing mill exit is locked. av Based on the measured values ​​of the looper angles between each frame, the dynamic correction value of the looper setting tension is calculated.

[0029] Preferably, the delay time T after the high temperature measurement value at the finishing mill exit is locked is... av， Among them, the high temperature gauge detected the delay time T after the strip steel was detected. av The empirical values ​​are given in the range of 10 to 500, and the unit is ms;

[0030] Based on the measured values ​​of the looper angles between each frame and other data, the formula for calculating the dynamic correction looper set tension value is as follows:

[0031]

[0032] Among them, T dn-1 This indicates the dynamic correction value for the looper's set tension compensation, in kN; t ave This indicates the temperature lock-in value of the strip head measured by the pyrometer, in °C; t aem This indicates the real-time temperature of the strip measured by the pyrometer, in °C; a FX This indicates the acceleration of the rear frame, in m / s². 2 ;TE FX-1 This indicates the set tension of the looper between each frame, in kN; Kp FX-1 Indicates the variable tension compensation coefficient of the front looper of each frame; AN FX-1 This indicates the set angle of the looper between each rack, in degrees; AN FaX-1 The actual angle between the loopers of each rack is expressed in degrees; TA represents the controller execution cycle.

[0033] The variable tension compensation coefficient Kp of the front looper of each frame FX-1 And the controller execution cycle TA, where the variable tension compensation coefficient Kp of the front looper of each frame. FX-1 The empirical value for the controller execution cycle (TA) is given in the range of 0.01 to 0.2. The empirical value for the controller execution cycle (TA) is given in the range of 1 to 32, in milliseconds.

[0034] Preferably, step S5 includes: after limiting the dynamic correction looper setting tension value, compensating it to the initial looper setting tension, wherein the dynamic correction looper setting tension value is limited.

[0035] Among them, the upper limit value Tu of the dynamic correction looper tension compensation value is set. dn-1 The empirical value is given in the range of 1~10, and the unit is kN; the lower limit value Tl of the dynamic correction loop tension compensation value is set. dn-1Its value is given by experience, and the range is -1 to -10, with the unit being kN;

[0036] The calculation formula for adjusting the dynamic correction looper setting tension compensation value to the initial looper setting tension is as follows:

[0037] TEA FX-1 = T dn-1 + TE FX-1

[0038] Among them, TEA FX-1 This indicates the set tension after compensation of the loopers between each frame, in kN; T dn-1 This indicates the dynamic correction value for the looper's set tension compensation, in kN; TE FX-1 This indicates the tension setting of the looper between each frame, in kN.

[0039] Preferably, step S6 includes: after the finishing mill throws the steel, the calculated dynamic correction loop tension compensation value of the strip is reset to zero.

[0040] Compared with the prior art, the technical effects and advantages of this invention are as follows: This method for controlling the variable tension of the looper during hot continuous rolling with increased speed...

[0041] (1) The delay time T after the high temperature gauge at the outlet of the finishing mill detects the strip steel. de Sampling and measured high temperature meter data t aem Locking is performed; the acceleration of the last stand of the finishing mill and the set threading speed S of each stand of the finishing mill are specified. FX Calculate the acceleration of each stand of the finishing mill; determine the set tension TE of the looper between each stand. FX-1 Setting Angle AN FX-1 ; Delay time T after the high temperature measurement value at the finishing mill exit is locked av Based on the measured values ​​of the looper angles between each stand, the dynamic correction looper set tension value is calculated; after limiting the dynamic correction looper set tension value, it is compensated to the initial looper set tension; after the finishing mill throws the steel, the calculated dynamic correction looper tension compensation value for this strip is cleared to zero.

[0042] (2) The control method of the present invention is simple and easy to implement. First, the data of the high temperature gauge at the outlet of the finishing mill is locked. Then, the speed, acceleration and looper setting tension and angle of each stand of the finishing mill are combined to calculate and dynamically correct the looper setting tension value. This can more accurately match the actual working conditions in the rolling process, realize the precise control of the looper tension, avoid abnormal tension affecting the strip quality, and help solve the problem of narrowing width caused by speed-up rolling and increased final rolling temperature in hot continuous rolling. For the temperature reduction, the tension can be appropriately increased to improve rolling stability. The width deviation is used as part of the adjustment basis, which has a positive significance for improving the strip width quality. Attached Figure Description

[0043] Figure 1 This is a flowchart illustrating the execution of a looper tension control method during hot continuous rolling speed-up rolling, as provided in an embodiment of the present invention. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0045] Please see Figure 1 This invention provides a technical solution: a method for controlling the variable tension of the looper during hot continuous rolling with increased speed, wherein the delay time T after the high temperature gauge at the exit of the finishing mill detects the strip steel is... de Sampling and measured high temperature meter data t aem Locking is performed; the acceleration of the last stand of the finishing mill and the set threading speed S of each stand of the finishing mill are specified. FX Calculate the acceleration of each stand of the finishing mill; determine the set tension TE of the looper between each stand. FX-1 Setting Angle AN FX-1 ; Delay time T after the high temperature measurement value at the finishing mill exit is locked av Based on the measured values ​​of the looper angles between each stand, the dynamic correction looper set tension value is calculated; after limiting the dynamic correction looper set tension value, it is compensated to the initial looper set tension; after the finishing mill throws the steel, the calculated dynamic correction looper tension compensation value for this strip is cleared to zero.

[0046] Specifically, the execution flow of this method is as follows: Figure 1 As shown, it includes the following steps:

[0047] S1, the delay time T after the high temperature gauge at the outlet of the finishing mill detects the strip steel. de Sampling and measured high temperature meter data t aem Lock it;

[0048] Among them, the high temperature gauge detected the delay time T after the strip steel was detected. de , is an empirical value, with a range of [10, 500], and the unit is ms.

[0049] The formula for calculating the pyrometer lockout value is as follows:

[0050]

[0051] Among them, t aveThis indicates the temperature lock-in value of the strip head measured by the pyrometer, in °C; t aem TA represents the real-time temperature of the strip measured by the pyrometer, in °C; TA represents the controller execution cycle, which is an empirically given value, ranging from [1,32], in ms; N represents the number of sampling points for the strip outlet temperature measured by the pyrometer, which is an empirically given value, ranging from [10,100].

[0052] S2, specify the acceleration of the last stand of the finishing mill and the set threading speed S for each stand of the finishing mill unit. FX Calculate the acceleration of each stand in the finishing mill;

[0053] Among them, the threading speed S is set according to the acceleration of the last stand and the speed of each stand of the finishing mill. FX Calculate the acceleration a of all rear frames except the last frame. FX The calculation formula is:

[0054] a FX-1 = S FX-1 / S FX × a FX

[0055] It should be noted that a FX S FX In this context, X represents the number of finishing mill units. For example, if the number of finishing mill units is 8, then the acceleration of the last stand is represented by a. F8 a FX-1 This indicates the acceleration of the front frame, in m / s². 2 S FX-1 This indicates the set threading speed of the front frame, in m / s; S FX This indicates the set belt threading speed of the rear frame, in m / s; a FX This indicates the acceleration of the rear frame, in m / s². 2 .

[0056] S3, clearly define the tension setting TE for the loopers between each rack. FX-1 Setting Angle AN FX-1 ;

[0057] It should be noted that TE FX-1 AN FX-1 In this context, 'X' represents the number of finishing mill units. For example, if the number of finishing mill units is 8, then the set tension of the looper before the last stand is TE7. The set tension of the looper between stands is TE. FX-1 The unit is kN, and the set angle AN between the loops of each frame is... FX-1 The unit is °.

[0058] S4, a delay of T after the high-temperature measurement value is locked at the finish mill exit. avBased on the measured values ​​of the looper angles between each frame, the dynamic correction looper set tension value is calculated.

[0059] Among them, the high temperature gauge detected the delay time T after the strip steel was detected. av , is an empirical value, with a range of [10, 500], and the unit is ms.

[0060] The formula for calculating the dynamic correction loop set tension value, based on measured data such as the loop angle between each frame, is as follows:

[0061]

[0062] Among them, T dn-1 This indicates the dynamic correction value for the looper's set tension compensation, in kN; t ave This indicates the temperature lock-in value of the strip head measured by the pyrometer, in °C; t aem This indicates the real-time temperature of the strip measured by the pyrometer, in °C; a FX This indicates the acceleration of the rear frame, in m / s². 2 ;TE FX-1 This indicates the set tension of the looper between each frame, in kN; Kp FX-1 AN represents the variable tension compensation coefficient of the front looper of each frame, which is given by experience and ranges from [0.01, 0.2]. FX-1 This indicates the set angle of the looper between each rack, in degrees; AN FaX-1 The actual angle between the loopers of each rack is expressed in degrees; TA represents the controller execution cycle, which is given by experience and ranges from [1,32] in milliseconds.

[0063] S5, after limiting the dynamic correction looper setting tension value, compensate it to the initial looper setting tension;

[0064] Specifically, the dynamic correction looper setting tension value is limited for protection. An upper limit value Tu is set for the dynamic correction looper setting tension compensation value. dn-1 Its value is given by experience, with a range of [1, 10], and the unit is kN; the lower limit value Tl of the dynamic correction looper tension compensation value is set. dn-1 Its value is given by experience, and its range is [-1, -10], with the unit being kN.

[0065] The calculation formula for adjusting the dynamic correction looper setting tension compensation value to the initial looper setting tension is as follows:

[0066] TEA FX-1 = T dn-1 + TE FX-1

[0067] Among them, TEA FX-1 This indicates the set tension after compensation of the loopers between each frame, in kN; T dn-1 This indicates the dynamic correction value for the looper's set tension compensation, in kN; TE FX-1 This indicates the tension setting of the looper between each frame, in kN.

[0068] S6. After the finishing mill throws out the steel, the calculated dynamic correction loop tension compensation value of this strip is reset to zero.

[0069] The implementation process of the method of the present invention will be described below with reference to specific application examples.

[0070] In this application example, taking a finishing mill with 8 stands as an example, the operation is as follows:

[0071] (1) After the high-temperature gauge at the outlet of the finishing mill detects the strip, a delay time is set, and the measured high-temperature gauge data is sampled and locked. The lock value is calculated using the following formula:

[0072]

[0073] The relevant parameter values ​​and calculation results are shown in Table 1 below:

[0074]

[0075] Table 1

[0076] (2) Determine the acceleration of the last stand of the finishing mill, the set threading speed of each stand of the finishing mill, and calculate the acceleration of each stand of the finishing mill. The calculation formula is as follows:

[0077] a FX-1 = S FX-1 / S FX × a FX

[0078] The calculation results are shown in Table 2 below:

[0079]

[0080] Table 2

[0081] It should be noted that because the looper is located between the front and rear racks, 7 loopers are used for 8 racks, meaning that the data from rack 1 does not need to be used. The same applies below.

[0082] (3) Clarify the setting tension and setting angle of the looper between each frame. The relevant parameter values ​​are shown in Table 3 below:

[0083]

[0084] Table 3

[0085] (4) After the high temperature measurement value at the finish mill exit is locked, a delay of T is applied. av T av The value is assigned to 200. Based on the measured values ​​of the looper angles between each frame and other data, the dynamic correction looper set tension value is calculated. The calculation formula is as follows:

[0086]

[0087] The relevant parameter values ​​and calculation results are shown in Table 4 below:

[0088]

[0089] Table 4

[0090] (5) After limiting the dynamic correction looper setting tension value, compensate it to the initial looper setting tension. The calculation formula is as follows:

[0091] TEA FX-1 = T dn-1 + TE FX-1

[0092] The relevant parameter values ​​and calculation results are shown in Table 5 below:

[0093]

[0094] Table 5

[0095] (6) After the finishing mill throws out the steel, the calculated dynamic correction loop tension compensation value of this strip is cleared to zero.

[0096] The above application examples demonstrate that the looper tension control method of the present invention during the hot continuous rolling speed-up process can dynamically correct the looper tension in real time during actual production, making it more convenient and flexible. It has a good effect on the width narrowing problem caused by speed-up rolling and increased final rolling temperature in hot continuous rolling, and has a positive significance for improving rolling stability and strip width quality.

[0097] In summary, the control method of this embodiment involves delaying the time after the high-temperature gauge at the finishing mill exit detects the strip, sampling and locking the measured high-temperature gauge data, determining the acceleration of the last stand of the finishing mill, the set strip-threading speed of each stand in the finishing mill, calculating the acceleration of each stand, and the set tension and angle of the looper between each stand. After the high-temperature gauge value at the finishing mill exit is locked and delayed for a period of time, the dynamically corrected looper set tension value is calculated based on the measured looper angle values ​​between each stand and other data. After limiting the dynamic corrected looper set tension value, it is compensated to the initial looper set tension. After the finishing mill ejects the strip, the calculated dynamically corrected looper tension compensation value for this strip is reset to zero. This method helps solve the problem of strip width narrowing caused by accelerated rolling and increased final rolling temperature in hot continuous rolling, and has a positive significance for improving rolling stability and strip width quality.

[0098] Furthermore, it should be noted that the present invention can be provided as a method, apparatus, or computer program product. Therefore, embodiments of the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, embodiments of the present invention can take the form of a computer program product implemented on one or more computer-usable storage media containing computer-usable program code.

[0099] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0100] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method of controlling the tension variation of a looper in a hot continuous rolling accelerated rolling process, characterized in that, Comprise: S1, the high-temperature gauge at the exit of the finishing rolling mill detects the strip steel and delays for a time T de , sampling the measured high-temperature gauge data t aem , locking S2, determine the last stand acceleration of the finishing mill and the set strip speed of each stand of the finishing mill group S FX , calculate the acceleration of each stand of the finishing mill; S3, set tension TE between each stand FX-1 , set angle AN FX-1 ; S4, after the high-temperature gauge value at the finish rolling outlet is locked, delay time T av According to the measured data of the loop angle between each stand, the dynamic correction loop setting tension value is calculated. S5, the dynamic correction loop setting tension value is protected after limiting the amplitude, and it is compensated to the initial loop setting tension; S6, after the strip steel is thrown by the finishing rolling unit, the dynamic correction loop tension compensation value of the strip steel is calculated and cleared; After the high temperature detector at the outlet of the finishing rolling unit detects the strip steel, the high temperature detector value is sampled and locked after a time delay; Wherein, the high temperature detector locking value calculation formula is: Wherein, t ave represents the measured strip head temperature locking value by pyrometer, unit: ℃; t aem represents the measured strip real-time temperature by pyrometer, unit: ℃; TA represents the controller execution cycle; N represents the number of sampling points of the measured strip outlet temperature by pyrometer; The S3 includes: defining the set tension TE of each stand FX-1 , the angle AN FX-1 ; wherein, it is to be noted that TE FX-1 , AN FX-1 represents the number of finishing mill stands, the set tension before the last stand represents TE7, the set tension between stands represents TE FX-1 , in kN, and the set angle between stands represents AN FX-1 , in °; T av The experience value is given in the range of 10-500 ms. According to the measured loop angle value between each rack, the dynamic correction loop setting tension value calculation formula is: wherein, T dn-1 represents the dynamic correction of the loop setting tension compensation value, and the unit is kN; a FX represents the rear rack acceleration, and the unit is m / s 2 ; TE FX-1 represents the loop setting tension between each rack, and the unit is kN; Kp FX-1 represents the loop variable tension compensation coefficient in front of each rack, and the value range of the experience value given is 0.01~0.2; AN FX-1 represents the loop setting angle between each rack, and the unit is °; AN FaX-1 represents the loop actual angle between each rack, and the unit is °; TA represents the controller execution period; the value range of the experience value given of the controller execution period TA is 1~32, and the unit is ms; In the S5, an upper limit value Tu of the dynamic correction loop setting tension compensation value is set dn-1 , and the experience value is given in the range of 1-10, with the unit of kN; and a lower limit value Tl of the dynamic correction loop setting tension compensation value is set dn-1 , and the experience value is given in the range of -1- -10, with the unit of kN; The dynamic correction loop setting tension compensation value is compensated to the initial loop setting tension calculation formula: TEA FX-1 = T dn-1 + TE FX-1 wherein TEA FX-1 represents the set tension of each stand after loop compensation, in kN; T dn-1 represents the dynamic correction loop set tension compensation value, in kN; TE FX-1 represents the set tension of each stand, in kN.

2. The method of controlling the looper tension during the hot continuous rolling accelerated rolling process according to claim 1, characterized in that, The S1 further comprises: a delay time T after the high-temperature detector at the exit of the finishing mill group detects the strip de The high-temperature detector value is sampled and locked, wherein the delay time T after the high-temperature detector detects the strip de The given experience value ranges from 10 to 500 ms.

3. The loop tension control method in the hot continuous rolling speed-up rolling process according to claim 1, characterized in that, The given experience value of TA is 1~32, and the unit is ms; the given experience value of N is 10~100.

4. The method of controlling the looper tension during the hot continuous rolling accelerated rolling process according to claim 1, wherein The S2 further comprises: According to the final stand acceleration, set the strip speed S of each stand of the finishing mill train FX The calculation formula of the acceleration a of the stands after the final stand is: FX ​ a FX-1 = S FX-1 / S FX × a FX wherein, a FX , S FX X in the formula represents the number of finishing mill groups, and the acceleration of the last stand represents a F8 , a FX-1 represents the acceleration of the front stand, and the unit is m / s 2 ; S FX-1 represents the set strip speed of the front stand, and the unit is m / s; S FX represents the set strip speed of the rear stand, and the unit is m / s; a FX represents the acceleration of the rear stand, and the unit is m / s 2 .

5. The method of controlling the looper tension during the hot continuous rolling accelerated rolling process according to claim 1, wherein, The S6 comprises: after the strip steel is thrown by the finishing rolling unit, the dynamic correction loop tension compensation value of the strip steel is calculated and cleared.

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