Strip steel rolling method and device

Abstract

The invention provides a strip steel rolling method and device, and relates to the technical field of strip steel rolling. The method comprises the steps that in the strip steel rolling process, the rolling speed and the tension deviation value between a first vibration rack and a second vibration rack are obtained; the first vibration rack and the second vibration rack are racks of the rolling mill, the rolling sequence of the first vibration rack is before the rolling sequence of the second vibration rack, and the tension deviation value is the deviation value between the reference tension value and the actual tension value; based on the rolling speed and the tension deviation value, a target roll gap adjustment value of the first vibration rack is determined; based on the target roll gap adjustment value and the first driving current proportionality coefficient, rolling of the strip steel is continued so as to reduce the occurrence probability of vibration of the rolling mill; the first proportionality coefficient is a proportionality coefficient of a drive current of a hydraulic pressure-on system of the first vibration rack. According to the strip steel rolling method and device, effective control over rolling mill vibration can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of strip rolling, in particular to a strip rolling method and device. BACKGROUND

[0002] The cold rolling mill has the characteristics of multivariable, strong coupling, nonlinearity, time-varying, multiple constraints and the like. During the rolling of high-strength thin-gauge strip, the rolling mill is prone to frequent vibration. The vibration of the rolling mill has been a technical problem since the commissioning of the plate and strip rolling mill. The vibration of the rolling mill is various, and the causes and characteristics are different. After the vibration of the rolling mill occurs, the consequences such as rolling texture, roll vibration texture, rolling instability or loss of equipment function precision are caused, which seriously threatens the stable production of the rolling mill. The vibration of the cold rolling mill mainly occurs during the rolling process of thin-gauge strip below 0.25 mm. When the vibration occurs, the tension between the stands fluctuates sharply. From the occurrence of the vibration to the sharp fluctuation of the tension, the time of strip breakage caused by the vibration of the rolling mill is about 1 second. Due to the occasional nature of the fault and the interval time limit of the strip breakage, the operator cannot timely discover and take corresponding operation, especially when the rolling speed is greater than 600 m / min, each vibration will cause the strip breakage of the rolling mill. Therefore, the vibration of the cold rolling mill seriously affects the stable operation of the rolling mill. At present, real-time and effective vibration control cannot be achieved. SUMMARY

[0003] The present application provides a strip rolling method and device to solve the defect that the vibration of the rolling mill cannot be effectively controlled in the prior art, and to achieve effective control of the vibration of the rolling mill.

[0004] In a first aspect, the present application provides a strip rolling method, comprising:

[0005] During the rolling of the strip, the rolling speed and the tension deviation value between the first vibration stand and the second vibration stand are obtained; the first vibration stand and the second vibration stand are both stands of the rolling mill, the rolling sequence of the first vibration stand is before that of the second vibration stand, and the tension deviation value is the deviation value of the reference tension value and the actual tension value;

[0006] Based on the rolling speed and the tension deviation value, a target roll gap adjustment value of the first vibration stand is determined;

[0007] Based on the target roll gap adjustment value and a first drive current proportional coefficient, the rolling of the strip is continued to reduce the occurrence probability of the vibration of the rolling mill; the first proportional coefficient is a proportional coefficient of the drive current of the hydraulic pressure system of the first vibration stand.

[0008] Optionally, the determination of the target roll gap adjustment value of the first vibration stand based on the rolling speed and the tension deviation value comprises:

[0009] if the rolling speed is less than the target speed threshold value and the absolute value of the tension deviation value is less than or equal to the first set value, determining the target roll gap adjustment value based on a first integral coefficient and a first proportional coefficient;

[0010] if the rolling speed is greater than or equal to the target speed threshold value and the absolute value of the tension deviation value is less than or equal to the second set value, determining the target roll gap adjustment value based on a second integral coefficient and a second proportional coefficient.

[0011] Optionally, the determining the target roll gap adjustment value based on the second integral coefficient and the second proportional coefficient comprises:

[0012] determining the second integral coefficient based on the tension deviation value, a plastic modulus of the strip, an elastic modulus of the rolling mill, an exit thickness of the first vibrating stand, and a rolling mill speed reference value of the first vibrating stand;

[0013] determining the second proportional coefficient based on a change rate of the tension deviation value, the plastic modulus and the elastic modulus;

[0014] determining the target roll gap adjustment value based on the second integral coefficient, the second proportional coefficient and the tension deviation value.

[0015] Optionally, the strip rolling method further comprises:

[0016] calculating a first position deviation value of a first hydraulic cylinder and a second position deviation value of a second hydraulic cylinder; the first hydraulic cylinder and the second hydraulic cylinder are hydraulic cylinders of a hydraulic press-up system of the first vibrating stand;

[0017] if it is determined that the rolling mill vibrates based on at least one of the first position deviation value and the second position deviation value, redetermining the first drive current proportional coefficient, and continuing the rolling of the strip based on the target roll gap adjustment value, the redetermined first drive current proportional coefficient, a second drive current proportional coefficient and a third drive current proportional coefficient; the second drive current proportional coefficient is a drive current proportional coefficient of a hydraulic press-up system of the second vibrating stand, the third drive current proportional coefficient is a drive current proportional coefficient of a hydraulic press-up system of the third vibrating stand, and the rolling sequence of the third vibrating stand is before the first vibrating stand.

[0018] Optionally, the continuing the rolling of the strip based on the target roll gap adjustment value, the redetermined first drive current proportional coefficient, the second drive current proportional coefficient and the third drive current proportional coefficient comprises:

[0019] The first driving current proportional coefficient, the second driving current proportional coefficient and the third driving current proportional coefficient re-determined are taken as target rolling parameters based on the target rolling parameters, and the rolling of the strip steel is continued.

[0020] Optionally, if the rolling speed is less than or equal to a first threshold value, the first driving current proportional coefficient is a first initial coefficient;

[0021] If the rolling speed is greater than the first threshold value and less than a second threshold value, the first driving current proportional coefficient is a first coefficient; the first coefficient is less than the first initial coefficient;

[0022] If the rolling speed is greater than or equal to the second threshold value and less than a third threshold value, the first driving current proportional coefficient is a second coefficient; the second coefficient is less than the first coefficient;

[0023] If the rolling speed is greater than or equal to the third threshold value and less than a fourth threshold value, the first driving current proportional coefficient is a third coefficient; the third coefficient is less than the second coefficient;

[0024] If the rolling speed is greater than or equal to the fourth threshold value, the first driving current proportional coefficient is a fourth coefficient; the fourth coefficient is less than the third coefficient.

[0025] Optionally, if the rolling speed is less than or equal to the first threshold value, the first driving current proportional coefficient re-determined is the first initial coefficient;

[0026] If the rolling speed is greater than the first threshold value and less than the second threshold value, the first driving current proportional coefficient re-determined is a fifth coefficient; the fifth coefficient is less than the first coefficient;

[0027] If the rolling speed is greater than or equal to the second threshold value and less than the third threshold value, the first driving current proportional coefficient re-determined is a sixth coefficient; the sixth coefficient is less than the second coefficient;

[0028] If the rolling speed is greater than or equal to the third threshold value and less than the fourth threshold value, the first driving current proportional coefficient re-determined is a seventh coefficient; the seventh coefficient is less than the third coefficient;

[0029] If the rolling speed is greater than or equal to the fourth threshold value, the first driving current proportional coefficient re-determined is an eighth coefficient; the eighth coefficient is less than the fourth coefficient.

[0030] Optionally, if the rolling speed is less than or equal to a fifth threshold value, the second driving current proportional coefficient is a second initial coefficient;

[0031] if the rolling speed is greater than the fifth threshold value and less than a sixth threshold value, the second driving current proportional coefficient is a ninth coefficient; the ninth coefficient is less than the second initial coefficient;

[0032] if the rolling speed is greater than or equal to the sixth threshold value and less than a seventh threshold value, the second driving current proportional coefficient is a tenth coefficient; the tenth coefficient is less than the ninth coefficient;

[0033] if the rolling speed is greater than or equal to the seventh threshold value and less than an eighth threshold value, the second driving current proportional coefficient is an eleventh coefficient; the eleventh coefficient is less than the tenth coefficient;

[0034] if the rolling speed is greater than or equal to the eighth threshold value, the second driving current proportional coefficient is a twelfth coefficient; the twelfth coefficient is less than the eleventh coefficient.

[0035] Optionally, if the rolling speed is less than or equal to a ninth threshold value, the third driving current proportional coefficient is a third initial coefficient;

[0036] if the rolling speed is greater than the ninth threshold value and less than a tenth threshold value, the third driving current proportional coefficient is a thirteenth coefficient; the thirteenth coefficient is less than the third initial coefficient;

[0037] if the rolling speed is greater than or equal to the tenth threshold value and less than an eleventh threshold value, the third driving current proportional coefficient is a fourteenth coefficient; the fourteenth coefficient is less than the thirteenth coefficient;

[0038] if the rolling speed is greater than or equal to the eleventh threshold value and less than a twelfth threshold value, the third driving current proportional coefficient is a fifteenth coefficient; the fifteenth coefficient is less than the fourteenth coefficient;

[0039] if the rolling speed is greater than or equal to the twelfth threshold value, the third driving current proportional coefficient is a sixteenth coefficient; the sixteenth coefficient is less than the fifteenth coefficient.

[0040] In a second aspect, the present application further provides a strip rolling device, comprising:

[0041] a collection module, configured to acquire a rolling speed and a tension deviation value between a first vibrating rack and a second vibrating rack in a rolling process of a strip; the first vibrating rack and the second vibrating rack are racks of the rolling mill, the rolling sequence of the first vibrating rack is before that of the second vibrating rack, and the tension deviation value is a deviation value of a reference tension value and an actual tension value;

[0042] determining a target roll gap adjustment value of the first vibrating stand based on the rolling speed and the tension deviation value;

[0043] continuing rolling of the strip steel based on the target roll gap adjustment value and a first driving current proportional coefficient to reduce the probability of occurrence of vibration of the rolling mill; the first proportional coefficient is a proportional coefficient of driving current of a hydraulic press-up system of the first vibrating stand.

[0044] In a third aspect, the present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor executes the computer program to implement the method in the first aspect.

[0045] In a fourth aspect, the present application also provides a non-transitory computer readable storage medium, which stores a computer program executable by a processor to implement the method in the first aspect.

[0046] In a fifth aspect, the present application also provides a computer program product, which includes a computer program executable by a processor to implement the method in the first aspect.

[0047] The strip steel rolling method and device provided by the present application can adjust the press-up response time of the hydraulic press-up system of the first vibrating stand and re-optimize the first driving current proportional coefficient of the tension control system by adjusting the target roll gap adjustment value and the first driving current proportional coefficient in advance, so as to change the action characteristics of the strip steel in the rotating and vertical pressing, change the adjustment characteristics of the tension system, change the energy coupling between the vertical pressing and the strip steel, reduce the frequency of occurrence of the rolling mill vibration, and thus improve the rolling efficiency and ensure the stability of the rolling process. BRIEF DESCRIPTION OF DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0049] Figure 1 is a flowchart of the strip steel rolling method provided by the embodiments of the present application;

[0050] Figure 2 is a structural schematic diagram of a cold rolling mill provided by the embodiments of the present application;

[0051] Figure 3 is a structural schematic diagram of a strip steel rolling device provided by the embodiments of the present application;

[0052] Figure 4 FIG. 1 is a structural schematic diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0053] For the purpose, technical solutions and advantages of the present application to be clearer, the technical solutions of the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0054] An embodiment of the present application provides a strip rolling method, an execution subject of the method can be an electronic device, for example, can be a controller. The execution subject of the method is taken as an example for description below. Figure 1 FIG. 2 is a flowchart of a strip rolling method provided by an embodiment of the present application. Referring to FIG. 2, Figure 1 The method can include the following steps.

[0055] In step 110, in a rolling process of a strip, a rolling speed and a tension deviation value between a first vibrating stand and a second vibrating stand are obtained. The first vibrating stand and the second vibrating stand are stands of a rolling mill, the rolling sequence of the first vibrating stand is before that of the second vibrating stand, and the tension deviation value is a deviation value of a reference tension value and an actual tension value.

[0056] In step 120, a target roll gap adjustment value of the first vibrating stand is determined based on the rolling speed and the tension deviation value.

[0057] In step 130, the rolling of the strip is continued based on the target roll gap adjustment value and a first driving current proportional coefficient, so as to reduce the occurrence probability of vibration of the rolling mill. The first proportional coefficient is a proportional coefficient of a driving current of a hydraulic press-up system of the first vibrating stand.

[0058] The hydraulic press-up system in the vertical direction of the cold rolling mill is mainly composed of a rolling mill frame, a roll, a strip, emulsion, a tension building device (a rolling mill or a coiler) before and after the rolling mill, a main hydraulic cylinder on the driving side of the rolling mill, a main hydraulic cylinder on the operating side of the rolling mill, a position sensor of the main hydraulic cylinder on the driving side of the rolling mill, a position sensor of the main hydraulic cylinder on the operating side of the rolling mill, a rolling mill hydraulic supply system, and components such as a pressure sensor (a rolling force pressure head). The rotation of the rolling mill is mainly driven by the rotation speed of the main motor to drive the work roll to rotate.

[0059] Wherein the rolling mill housing is mainly used as the basic frame of the whole rolling mill equipment, the roll is used for rolling force pressing and transmission in the rolling process, the roll is driven by the transmission motor to roll the target strip, the emulsion is used as the lubricating system to play a lubricating and cooling role, the tensioning equipment (rolling mill or coiler) before and after the rolling mill is used to provide tension in the rolling process to ensure stable rolling, the main hydraulic cylinder on the driving side of the rolling mill is used to provide the pressing force on the driving side, the main hydraulic cylinder on the operating side of the rolling mill is used to provide the pressing force on the operating side, the main hydraulic cylinder position sensor on the driving side of the rolling mill is used to detect the position value of the main hydraulic cylinder on the driving side, the main hydraulic cylinder position sensor on the operating side of the rolling mill is used to detect the position value of the main hydraulic cylinder on the operating side, and the rolling mill hydraulic supply system is mainly used to provide the pressing hydraulic energy of the main hydraulic cylinder. The pressure sensor (rolling force pressure head) is used to calculate the rolling force provided by the hydraulic cylinder to the strip.

[0060] Figure 2 is a structural schematic diagram of a cold rolling mill provided by the embodiment of the application. As shown in Figure 2 the actual rolling process, the 4 pressing hydraulic cylinders act on the 3 strip in the thickness direction of the strip to press against the strip vertically, the action position of the 4 pressing hydraulic cylinders is monitored in real time by the 5 position sensor, the transmission motor 6 rotates to drive the 2 rolls to rotate, and the 3 strip is pulled forward by the tension to realize the continuous thinning of the strip in the length direction in the thickness direction of the strip. In the actual rolling process, the 4 pressing hydraulic cylinders of the strip act according to the control position value through the position reference value, the actual position value of the 4 pressing hydraulic cylinders is close to the reference position value in the action process, and the current hydraulic cylinder position is fed back by the 5 position sensor to realize closed-loop control, thereby realizing stable rolling of the strip.

[0061] When the rolling mill vibrates, the tension will oscillate greatly, and the synchronous hydraulic cylinder position will also appear forced oscillation, which will cause resonance of the rolling mill equipment and the strip. In view of the characteristics of the rolling mill vibration, the application proposes the following method:

[0062] In step 110, the controller can acquire a rolling speed and a tension deviation value between a first vibration frame and a second vibration frame in a strip rolling process. The first vibration frame and the second vibration frame are both frames of the rolling mill, the rolling sequence of the first vibration frame is before that of the second vibration frame, and the tension deviation value is a deviation value of a reference tension value and an actual tension value. The rolling speed is usually the speed of the last frame. The first vibration frame is the frame most prone to vibration.

[0063] In step 120, the controller can determine different target roll gap adjustment value calculation methods based on the rolling speed and the size of the tension deviation value.

[0064] In step 130, the controller can adjust the target roll gap adjustment value and the first drive current proportional coefficient as new rolling parameters of the strip steel, and continue rolling of the strip steel based on the new rolling parameters to reduce the probability of occurrence of the vibration of the rolling mill. The first proportional coefficient is a proportional coefficient of the drive current of the hydraulic press-up system of the first vibrating stand. By controlling the drive current of the hydraulic press-up system through the first proportional coefficient, the reaction speed and the response time of the hydraulic press-up system to the target command can be controlled.

[0065] The strip steel rolling method provided by the embodiments of the present application can adjust the press-up response time of the hydraulic press-up system of the first vibrating stand and re-optimize the first drive current proportional coefficient of the tension control system by adjusting the target roll gap adjustment value and the first drive current proportional coefficient in advance, so as to change the action characteristics of the strip steel in the rotation and vertical pressing, change the adjustment characteristics of the tension system, and further change the energy coupling between the vertical pressing and the strip steel, thereby reducing the frequency of occurrence of the vibration of the rolling mill, improving the rolling efficiency, and ensuring the stability of the rolling process.

[0066] In some embodiments, based on the rolling speed and the tension deviation value, the target roll gap adjustment value of the first vibrating stand is determined, including: if the rolling speed is less than a target speed threshold value, and the absolute value of the tension deviation value is less than or equal to a first set value, the target roll gap adjustment value is determined based on a first integral coefficient and a first proportional coefficient; if the rolling speed is greater than or equal to the target speed threshold value, and the absolute value of the tension deviation value is less than or equal to a second set value, the target roll gap adjustment value is determined based on a second integral coefficient and a second proportional coefficient.

[0067] In order to better control the tension between the first vibrating stand and the second vibrating stand, different control measures are taken in different conditions in the present application. Specifically, if the rolling speed V is less than a target speed threshold value (such as 500 mpm), and the absolute value |T ref -T fb of the tension deviation value T ref -T fb (T ref is a reference tension value, and T fb is an actual tension value) is less than or equal to a first set value (such as 5% x T ref ), the target roll gap adjustment value is determined based on a first integral coefficient and a first proportional coefficient; if the rolling speed V is greater than or equal to the target speed threshold value (such as 500 mpm), and the absolute value |T ref -T fb | of the tension deviation value is less than or equal to a second set value (such as 5% x T ref or 0.7 tons), the target roll gap adjustment value is determined based on a second integral coefficient and a second proportional coefficient.

[0068] Specifically, the first integral coefficient and the first proportional coefficient are set values, and a calculation process of determining the target roll gap adjustment value based on the first integral coefficient and the first proportional coefficient is as follows:

[0069]

[0070] wherein, Δs is the target roll gap adjustment value of the first vibrating stand, K I1 is the first integral coefficient, G I and G p are system integral and proportional calculation coefficients respectively, T ref is the reference tension value, T fb is the actual tension value, ΔT S is the time delay, K p1 is the first proportional coefficient.

[0071] The strip rolling method provided by the embodiments of the present application can further change the adjustment characteristics of the tension system under different conditions by adopting different target roll gap adjustment value calculation methods, thereby reducing the deviation between the actual position and the reference position of the hydraulic cylinder of the hydraulic pressure system of the first vibrating stand, reducing the frequency of occurrence of rolling mill vibration, thereby improving the rolling efficiency and ensuring the stability of the rolling process.

[0072] In some embodiments, determining the target roll gap adjustment value based on the second integral coefficient and the second proportional coefficient comprises: determining the second integral coefficient based on the tension deviation value, the plastic modulus of the strip, the elastic modulus of the rolling mill, the outlet thickness of the first vibrating stand, and the rolling mill speed reference value of the first vibrating stand; determining the second proportional coefficient based on the change rate of the tension deviation value, the plastic modulus and the elastic modulus; and determining the target roll gap adjustment value based on the second integral coefficient, the second proportional coefficient and the tension deviation value.

[0073] The calculation method of the second integral coefficient is as follows:

[0074]

[0075] wherein, K I2 is the second integral coefficient, T ref is the reference tension value, T fb is the actual tension value, P is the plastic modulus of the strip, which is obtained by performing a strip tensile test in a laboratory, Q is the elastic modulus of the rolling mill, which is obtained by performing a pressing test on the stand, h is the outlet thickness of the first vibrating stand, and v is the rolling mill speed reference value of the first vibrating stand.

[0076] The calculation method of the second proportional coefficient is as follows:

[0077]

[0078] wherein, Δ(T ref-T fb ) represents the rate of change of tension deviation, which is the change in tension deviation between two scanning cycles. α is the proportionality coefficient of the British Iron and Steel Research Association (BISRA) for the mill thickness control system, which is related to thickness and roll gap reduction. P is the plastic modulus of the strip, obtained through tensile tests on the strip in the laboratory. Q is the elastic modulus of the mill, obtained through pressing tests on the mill stand.

[0079] Based on the second integral coefficient, the second proportional coefficient, and the tension deviation value, the target roll gap adjustment value is calculated as follows:

[0080]

[0081] Where Δs is the target roll gap adjustment value of the first vibratory frame, K I2 G is the second integral coefficient. I and G p The coefficients for system integral and proportional calculations are respectively, T ref For reference tension value, T fb The actual tension value, ΔT S For the delay time, K p2 This is the second proportionality coefficient.

[0082] The strip rolling method provided in this application adopts different target roll gap adjustment value calculation methods under different conditions, which can further change the adjustment characteristics of the tension system, thereby reducing the deviation between the actual position and the reference position of the hydraulic cylinder of the hydraulic pressing system of the first vibrating stand, reducing the frequency of mill vibration, thereby improving rolling efficiency and ensuring the stability of the rolling process.

[0083] In some embodiments, the strip rolling method further includes: calculating a first position deviation value of a first hydraulic cylinder and a second position deviation value of a second hydraulic cylinder; both the first and second hydraulic cylinders are hydraulic cylinders of the hydraulic pressing system of a first vibrating mill stand; if it is determined that the mill is vibrating based on at least one of the first and second position deviation values, a first drive current proportional coefficient is re-determined, and strip rolling continues based on a target roll gap adjustment value, the re-determined first drive current proportional coefficient, the second drive current proportional coefficient, and the third drive current proportional coefficient; the second drive current proportional coefficient is the proportional coefficient of the drive current of the hydraulic pressing system of the second vibrating mill stand, the third drive current proportional coefficient is the proportional coefficient of the drive current of the hydraulic pressing system of the third vibrating mill stand, and the rolling sequence of the third vibrating mill stand precedes that of the first vibrating mill stand.

[0084] The position deviation value is a deviation value of an actual position of the hydraulic cylinder from a reference position. Specifically, the first hydraulic cylinder can be a WS-side hydraulic cylinder, and the second hydraulic cylinder can be a DS-side hydraulic cylinder. The position deviation value of the first hydraulic cylinder in one cycle is μ ws , and the position deviation value of the second hydraulic cylinder in one cycle is μ DS . The controller can calculate the first position deviation value of the first hydraulic cylinder in the adjacent 15 cycles , calculate the second position deviation value of the second hydraulic cylinder in the adjacent 15 cycles , and calculate the first and second hydraulic cylinder position total deviation value μ 总 = μ ws总 + μ DS总 . When μ ws总 ≥ 15 μm or μ DS总 ≥ 15 μm or μ 总 ≥ 100 μm, it is determined that the rolling mill vibrates.

[0085] If the rolling mill vibrates, the controller re-determines the first drive current proportional coefficient, and continues the rolling of the strip based on the target roll gap adjustment value, the re-determined first drive current proportional coefficient, the second drive current proportional coefficient, and the third drive current proportional coefficient.

[0086] The strip rolling method provided by the embodiments of the present application can judge whether the rolling mill vibrates by monitoring the position deviation change of the hydraulic cylinder in real time, and further perform multi-rolling mill joint adjustment on the vertical press-on system when the rolling mill has a vibration trend, so as to reduce the frequency coupling of the vertical press-on system and the rolling system, and further suppress the adverse consequences caused by the rolling mill vibration.

[0087] In some embodiments, the continuing rolling of the strip based on the target roll gap adjustment value, the re-determined first drive current proportional coefficient, the second drive current proportional coefficient, and the third drive current proportional coefficient includes: keeping the target roll gap adjustment value unchanged, taking the re-determined first drive current proportional coefficient, the second drive current proportional coefficient, and the third drive current proportional coefficient as target rolling parameters, and continuing the rolling of the strip based on the target rolling parameters.

[0088] The controller can keep the current target roll gap adjustment value unchanged after the rolling mill vibrates, take the re-determined first drive current proportional coefficient, the second drive current proportional coefficient, and the third drive current proportional coefficient as target rolling parameters, and continue the rolling of the strip based on the target rolling parameters.

[0089] The strip rolling method provided by the embodiments of the present application keeps the current target roll gap adjustment value locked and no longer output after the vibration of the rolling mill occurs, thereby avoiding the deterioration of the vibration consequences caused by the deviation of the tension adjustment.

[0090] In some embodiments, if the rolling speed is less than or equal to a first threshold value, the first driving current proportional coefficient is a first initial coefficient; if the rolling speed is greater than the first threshold value and less than a second threshold value, the first driving current proportional coefficient is a first coefficient; the first coefficient is less than the first initial coefficient; if the rolling speed is greater than or equal to the second threshold value and less than a third threshold value, the first driving current proportional coefficient is a second coefficient; the second coefficient is less than the first coefficient; if the rolling speed is greater than or equal to the third threshold value and less than a fourth threshold value, the first driving current proportional coefficient is a third coefficient; the third coefficient is less than the second coefficient; if the rolling speed is greater than or equal to the fourth threshold value, the first driving current proportional coefficient is a fourth coefficient; the fourth coefficient is less than the third coefficient.

[0091] The rolling speed can be represented as V. The first initial coefficient is a standard proportional coefficient of the hydraulic pressure system of the first vibration rack after being calibrated according to the response time requirement, and can be represented as P1. The first driving current proportional coefficient can be represented as P1'.

[0092] For example, the first threshold value is 400 mpm, the second threshold value is 760 mpm, the third threshold value is 900 mpm, the fourth threshold value is 1000 mpm, the first coefficient is 0.8×P1, the second coefficient is 0.7×P1, the third coefficient is 0.6×P1, and the fourth coefficient is 0.55×P1. The change process of the first driving current proportional coefficient P1' with the rolling speed V can be represented as:

[0093] P1' = P1 V≤400mpm;

[0094] P1' = 0.8×P1 400mpm<V<760mpm;

[0095] P1' = 0.7×P1 760mpm≤V<900mpm;

[0096] P1' = 0.6×P1 900mpm≤V<1000mpm;

[0097] P1' = 0.55×P1 1000mpm≤V.

[0098] The strip rolling method provided by the embodiments of the present application can adjust the pressing response time of the hydraulic pressing system of the first vibrating frame and re-optimize the first driving current proportional coefficient of the tension control system by adjusting the target roll gap adjustment value and the first driving current proportional coefficient in advance, so as to change the action characteristics of the strip in the rotating and vertical pressing directions, change the adjustment characteristics of the tension system, change the energy coupling between the vertical pressing and the strip, reduce the probability of occurrence of rolling mill vibration, and thus improve the rolling efficiency and ensure the stability of the rolling process.

[0099] In some embodiments, if the rolling speed is less than or equal to the first threshold value, the re-determined first driving current proportional coefficient is the first initial coefficient; if the rolling speed is greater than the first threshold value and less than a second threshold value, the re-determined first driving current proportional coefficient is a fifth coefficient; the fifth coefficient is less than the first coefficient; if the rolling speed is greater than or equal to the second threshold value and less than a third threshold value, the re-determined first driving current proportional coefficient is a sixth coefficient; the sixth coefficient is less than the second coefficient; if the rolling speed is greater than or equal to the third threshold value and less than a fourth threshold value, the re-determined first driving current proportional coefficient is a seventh coefficient; the seventh coefficient is less than the third coefficient; if the rolling speed is greater than or equal to the fourth threshold value, the re-determined first driving current proportional coefficient is an eighth coefficient; the eighth coefficient is less than the fourth coefficient.

[0100] For example, the first threshold value is 400 mpm, the second threshold value is 760 mpm, the third threshold value is 900 mpm, the fourth threshold value is 1000 mpm, the fifth coefficient is 0.7×P1, the sixth coefficient is 0.5×P1, the seventh coefficient is 0.4×P1, and the eighth coefficient is 0.3×P1, and the change process of the re-determined first driving current proportional coefficient P1' with the rolling speed V can be represented as:

[0101] P1' = P1 V≤400mpm;

[0102] P1' = 0.7×P1 400mpm

[0103] P1' = 0.5×P1 760mpm≤V<900mpm;

[0104] P1' = 0.4×P1 900mpm≤V<1000mpm;

[0105] P1' = 0.3×P1 1000mpm≤V;

[0106] The strip rolling method provided by the embodiments of the present application can judge whether the rolling mill is vibrating by monitoring the position deviation change of the hydraulic cylinder in real time, and when the rolling mill has a vibration trend, the frequency of the press-up of the rack is adjusted by adjusting the first driving current proportional coefficient, the vertical press-up system is further adjusted in combination with multiple rolling mills, the frequency coupling between the vertical press-up system and the rolling system is reduced, and the rolling mill speed reduction and the tension adjustment output abnormality caused by the abnormal fluctuation of the tension at this time can be performed according to the monitored occurrence of the rolling mill vibration, so that the adverse consequences caused by the rolling mill vibration are further suppressed.

[0107] In some embodiments, if the rolling speed is less than or equal to a fifth threshold value, the second driving current proportional coefficient is a second initial coefficient; if the rolling speed is greater than the fifth threshold value and less than a sixth threshold value, the second driving current proportional coefficient is a ninth coefficient; the ninth coefficient is less than the second initial coefficient; if the rolling speed is greater than or equal to the sixth threshold value and less than a seventh threshold value, the second driving current proportional coefficient is a tenth coefficient; the tenth coefficient is less than the ninth coefficient; if the rolling speed is greater than or equal to the seventh threshold value and less than an eighth threshold value, the second driving current proportional coefficient is an eleventh coefficient; the eleventh coefficient is less than the tenth coefficient; if the rolling speed is greater than or equal to the eighth threshold value, the second driving current proportional coefficient is a twelfth coefficient; the twelfth coefficient is less than the eleventh coefficient.

[0108] The second initial coefficient is a standard proportional coefficient of the hydraulic press-up system of the second vibrating rack after being calibrated according to the response time requirement, and can be represented as P2. The second driving current proportional coefficient can be represented as P2'.

[0109] For example, the fifth threshold value is 400 mpm, the sixth threshold value is 760 mpm, the seventh threshold value is 900 mpm, the eighth threshold value is 1000 mpm, the ninth coefficient is 0.8×P2, the tenth coefficient is 0.7×P2, the eleventh coefficient is 0.6×P2, and the twelfth coefficient is 0.5×P2, and then the change process of the second driving current proportional coefficient P2' with the rolling speed V can be represented as:

[0110] P2' = P2 V≤400mpm;

[0111] P2' = 0.8×P2 400mpm<V<760mpm;

[0112] P2' = 0.7×P2 760mpm≤V<900mpm;

[0113] P2' = 0.6×P2 900mpm≤V<1000mpm;

[0114] P2' = 0.5×P2 1000mpm≤V;

[0115] Further, in some embodiments, if the rolling speed is less than or equal to a ninth threshold value, the third drive current proportional coefficient is a third initial coefficient; if the rolling speed is greater than the ninth threshold value and less than a tenth threshold value, the third drive current proportional coefficient is a thirteenth coefficient; the thirteenth coefficient is less than the third initial coefficient; if the rolling speed is greater than or equal to the tenth threshold value and less than an eleventh threshold value, the third drive current proportional coefficient is a fourteenth coefficient; the fourteenth coefficient is less than the thirteenth coefficient; if the rolling speed is greater than or equal to the eleventh threshold value and less than a twelfth threshold value, the third drive current proportional coefficient is a fifteenth coefficient; the fifteenth coefficient is less than the fourteenth coefficient; if the rolling speed is greater than or equal to the twelfth threshold value, the third drive current proportional coefficient is a sixteenth coefficient; the sixteenth coefficient is less than the fifteenth coefficient.

[0116] The third initial coefficient is a standard proportional coefficient calibrated by a hydraulic pressure system of the third vibrating stand according to a response time requirement, and can be represented as P0. The third drive current proportional coefficient can be represented as P0'.

[0117] For example, the ninth threshold value is 400 mpm, the tenth threshold value is 760 mpm, the eleventh threshold value is 900 mpm, the twelfth threshold value is 1000 mpm, the thirteenth coefficient is 0.9*P0, the fourteenth coefficient is 0.85*P0, the fifteenth coefficient is 0.8*P0, and the sixteenth coefficient is 0.75*P0. The change process of the third drive current proportional coefficient P0' with the rolling speed V can be represented as:

[0118] P0'=P0 V≤400 mpm;

[0119] P0'=0.9*P0 400 mpm

[0120] P0'=0.85*P0 760 mpm≤V<900 mpm;

[0121] P0'=0.8*P0 900 mpm≤V<1000 mpm;

[0122] P0'=0.75*P0 1000 mpm≤V;

[0123] The strip rolling method provided by the embodiments of the present application can monitor the position deviation change of the hydraulic cylinder in real time, determine whether the rolling mill is vibrating, adjust the pressing frequency of the stand by adjusting the second and third drive current proportional coefficients when the rolling mill has a vibration trend, further jointly adjust the vertical pressing system for multiple rolling mills, reduce the frequency coupling between the vertical pressing system and the rolling system, and can output an abnormal tension adjustment output due to abnormal tension fluctuation when the rolling mill vibration occurs, so as to further curb the adverse consequences caused by the rolling mill vibration.

[0124] Based on the description of the above embodiments, the present application is mainly aimed at the situation that the cold rolling mill is unstable in rolling process due to the vibration of the rolling mill caused by occasional vibration, which leads to abnormal fluctuation of the tension between the racks, the rolling force and the thickness of the strip, and thus the product performance is not qualified. Through the collection of the structural characteristics of the equipment and the vibration process data, the control method of the present application can accurately monitor the occurrence of the rolling mill vibration by real-time monitoring and calculation of the position deviation of the hydraulic cylinder. At the same time, the adjustment of the response time of each pressure hydraulic cylinder and the adjustment of the tension control mode before and after the occurrence of the rolling mill vibration can achieve the purpose of suppressing the occurrence of the rolling mill vibration and reducing the deterioration of the vibration consequences caused by the rolling mill vibration, so as to realize the purpose of real-time detection of the rolling mill vibration, vibration suppression in the normal rolling process and vibration suppression through real-time parameter adjustment after the occurrence of the vibration. The present application can intervene in advance to reduce the occurrence of the rolling mill vibration, eliminate the vibration in time after the occurrence of the rolling mill vibration in the rolling process, realize the suppression of the rolling mill vibration, and avoid the occurrence of the deterioration of the rolling mill vibration.

[0125] The strip rolling device provided by the present application will be described below. The strip rolling device described below can be referred to in correspondence with the strip rolling method described above.

[0126] Figure 3 FIG. 1 is a structural schematic diagram of a strip rolling device provided by an embodiment of the present application. Referring to FIG. 1, Figure 3 The strip rolling device provided by the embodiment of the present application can include:

[0127] The acquisition module 310 is configured to acquire a rolling speed and a tension deviation value between a first vibration rack and a second vibration rack in the rolling process of a strip. The first vibration rack and the second vibration rack are both racks of the rolling mill. The rolling sequence of the first vibration rack is before that of the second vibration rack. The tension deviation value is a deviation value of a reference tension value and an actual tension value.

[0128] The determination module 320 is configured to determine a target roll gap adjustment value of the first vibration rack based on the rolling speed and the tension deviation value.

[0129] The rolling module 330 is configured to continue the rolling of the strip based on the target roll gap adjustment value and a first driving current proportional coefficient, so as to reduce the probability of occurrence of the vibration of the rolling mill. The first proportional coefficient is a proportional coefficient of a driving current of a hydraulic pressure-up system of the first vibration rack.

[0130] The strip steel rolling device provided by the embodiment of the present application can adjust the pressing response time of the hydraulic pressing system of the first vibrating frame by adjusting the target roll gap adjustment value and the first driving current proportional coefficient in advance, and re-optimize the first driving current proportional coefficient of the tension control system, so as to change the action characteristics of the strip steel in the rotating and vertical pressing, change the adjustment characteristics of the tension system, change the energy coupling between the vertical pressing and the strip steel, reduce the frequency of the occurrence of the rolling mill vibration, and thus improve the rolling efficiency and ensure the stability of the rolling process.

[0131] Specifically, the strip steel rolling device provided by the embodiment of the present application can realize all the method steps realized by the method embodiment whose execution subject is the controller, and achieve the same technical effects. Here, the same parts and beneficial effects in the method embodiment will not be described in detail.

[0132] Figure 4 is a structural schematic diagram of an electronic device provided by the embodiment of the present application. As shown in Figure 4 the electronic device can include a processor 410, a communications interface 420, a memory 430 and a communications bus 440, wherein the processor 410, the communications interface 420 and the memory 430 complete mutual communication through the communications bus 440. The processor 410 can invoke the logic instructions in the memory 430 to execute a strip steel rolling method, for example, including:

[0133] In the rolling process of the strip steel, the rolling speed and the tension deviation value between the first vibrating frame and the second vibrating frame are obtained; the first vibrating frame and the second vibrating frame are both frames of the rolling mill, the rolling sequence of the first vibrating frame is before that of the second vibrating frame, and the tension deviation value is the deviation value of the reference tension value and the actual tension value;

[0134] Based on the rolling speed and the tension deviation value, a target roll gap adjustment value of the first vibrating frame is determined;

[0135] Based on the target roll gap adjustment value and the first driving current proportional coefficient, the rolling of the strip steel is continued to reduce the occurrence probability of the vibration of the rolling mill; the first proportional coefficient is the proportional coefficient of the driving current of the hydraulic pressing system of the first vibrating frame.

[0136] Further, the logic instructions in the memory 430 described above can be implemented in the form of software functional units and sold or used as independent products, and can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the parts that make contributions to the prior art or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling 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 the various embodiments of the present application. The aforementioned storage medium includes various media that can store program codes, such as a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0137] In another aspect, the present application also provides a non-transitory computer readable storage medium having stored thereon a computer program, which, when executed by a processor, implements the steps of the strip rolling method provided by the above-mentioned methods, for example, including:

[0138] In the rolling process of the strip, the rolling speed and the tension deviation value between the first vibration stand and the second vibration stand are obtained; the first vibration stand and the second vibration stand are both stands of the rolling mill, the rolling sequence of the first vibration stand is before the second vibration stand, and the tension deviation value is a deviation value of a reference tension value and an actual tension value;

[0139] Based on the rolling speed and the tension deviation value, a target roll gap adjustment value of the first vibration stand is determined;

[0140] Based on the target roll gap adjustment value and a first drive current proportional coefficient, the rolling of the strip is continued to reduce the occurrence probability of vibration of the rolling mill; the first proportional coefficient is a proportional coefficient of a drive current of a hydraulic pressure system of the first vibration stand.

[0141] In another aspect, the present application also provides a computer program product, the computer program product comprising a computer program, the computer program being storable on a non-transitory computer readable storage medium, and the computer being capable of executing the steps of the strip rolling method provided by the above-mentioned methods when the computer program is executed by a processor, for example, including:

[0142] In the rolling process of the strip steel, a rolling speed and a tension deviation value between a first vibrating stand and a second vibrating stand are obtained; the first vibrating stand and the second vibrating stand are stands of the rolling mill, the rolling sequence of the first vibrating stand is before the second vibrating stand, and the tension deviation value is a deviation value of a reference tension value and an actual tension value;

[0143] Based on the rolling speed and the tension deviation value, a target roll gap adjustment value of the first vibrating stand is determined;

[0144] Based on the target roll gap adjustment value and a first driving current proportional coefficient, the rolling of the strip steel is continued to reduce the occurrence probability of the vibration of the rolling mill; the first proportional coefficient is a proportional coefficient of a driving current of a hydraulic pressure system of the first vibrating stand.

[0145] The device embodiments described above are only illustrative, wherein the units illustrated as separate components can or can not be physically separated, and the components illustrated as units can or can not be physical units, i.e., can be located in one place or distributed on multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment scheme according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0146] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be realized by means of software and necessary general hardware platforms, and of course can also be realized by hardware. Based on such understanding, the above technical solutions can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

[0147] In addition, it should be noted that: in the embodiments of the present application, the terms "first", "second", etc. are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second" are usually a class, and do not limit the number of objects, for example, the first object can be one or more.

[0148] In the embodiments of the present application, the term "and / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after it.

[0149] In the embodiments of the present application, "determining B based on A" means that A is considered as a factor when determining B. It is not limited to "determining B based on A only", but also includes "determining B based on A and C", "determining B based on A, C and E", "determining C based on A, and determining B based on C further", and the like. In addition, it can also include A as a condition for determining B, for example, "when A meets the first condition, B is determined by using the first method"; for example, "when A meets the second condition, B is determined"; for example, "when A meets the third condition, B is determined based on the first parameter". Of course, A can also be a condition for determining B, for example, "when A meets the first condition, C is determined by using the first method, and B is further determined based on C".

[0150] In the embodiments of the present application, the term "multiple" means two or more, and other quantifiers are similar.

[0151] In the embodiments of the present application, the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0152] In the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood in a broad sense, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0153] In the embodiments of the present application, unless specifically defined and limited otherwise, a first feature is "on", "above", or "below" a second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact with an intervening medium. Also, a first feature "over", "above", and "on" a second feature can mean that the first feature is directly above or obliquely above the second feature, or that the first feature is merely horizontally higher than the second feature. A first feature "under", "below", and "underneath" a second feature can mean that the first feature is directly below or obliquely below the second feature, or that the first feature is merely horizontally lower than the second feature.

[0154] In the embodiments of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the embodiments of the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0155] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for rolling strip steel, characterized in that, include: During the strip rolling process, the rolling speed and the tension deviation between the first and second vibratory stands are obtained. Both the first vibrating stand and the second vibrating stand are stands of the rolling mill. The rolling sequence of the first vibrating stand is before that of the second vibrating stand. The tension deviation value is the deviation between the reference tension value and the actual tension value. Based on the rolling speed and the tension deviation value, the target roll gap adjustment value of the first vibrating stand is determined; Based on the target roll gap adjustment value and the first drive current proportional coefficient, the strip rolling continues to reduce the probability of the mill vibration. The first proportional coefficient is the proportional coefficient of the driving current of the hydraulic pressing system of the first vibrating frame.

2. The strip rolling method according to claim 1, characterized in that, Determining the target roll gap adjustment value of the first vibratory stand based on the rolling speed and the tension deviation value includes: If the rolling speed is less than the target speed threshold and the absolute value of the tension deviation is less than or equal to the first set value, the target roll gap adjustment value is determined based on the first integral coefficient and the first proportional coefficient. If the rolling speed is greater than or equal to the target speed threshold, and the absolute value of the tension deviation is less than or equal to the second set value, the target roll gap adjustment value is determined based on the second integral coefficient and the second proportional coefficient.

3. The strip rolling method according to claim 2, characterized in that, Determining the target roll gap adjustment value based on the second integral coefficient and the second proportional coefficient includes: The second integral coefficient is determined based on the tension deviation value, the plastic modulus of the strip, the elastic modulus of the mill, the exit thickness of the first vibrating stand, and the mill speed reference value of the first vibrating stand. The second proportionality coefficient is determined based on the rate of change of the tension deviation value, the plastic modulus, and the elastic modulus; The target roll gap adjustment value is determined based on the second integral coefficient, the second proportional coefficient, and the tension deviation value.

4. The strip rolling method according to claim 1, characterized in that, Also includes: Calculate the first position deviation value of the first hydraulic cylinder and the second position deviation value of the second hydraulic cylinder; both the first hydraulic cylinder and the second hydraulic cylinder are hydraulic cylinders of the hydraulic pressing system of the first vibrating frame; If it is determined that the mill is vibrating based on at least one of the first position deviation value and the second position deviation value, the first drive current proportional coefficient is re-determined, and the strip rolling continues based on the target roll gap adjustment value, the re-determined first drive current proportional coefficient, the second drive current proportional coefficient, and the third drive current proportional coefficient. The second driving current proportional coefficient is the proportional coefficient of the driving current of the hydraulic pressing system of the second vibratory mill stand, and the third driving current proportional coefficient is the proportional coefficient of the driving current of the hydraulic pressing system of the third vibratory mill stand. The rolling sequence of the third vibratory mill stand is before that of the first vibratory mill stand.

5. The strip rolling method according to claim 4, characterized in that, The step of continuing the strip rolling based on the target roll gap adjustment value, the re-determined first drive current proportional coefficient, second drive current proportional coefficient, and third drive current proportional coefficient includes: Keeping the target roll gap adjustment value unchanged, the newly determined first drive current ratio coefficient, second drive current ratio coefficient and third drive current ratio coefficient are used as target rolling parameters, and the strip rolling continues based on the target rolling parameters.

6. The strip rolling method according to claim 4, characterized in that, If the rolling speed is less than or equal to the first threshold, the first driving current proportional coefficient is the first initial coefficient; If the rolling speed is greater than the first threshold and less than the second threshold, the first driving current proportional coefficient is the first coefficient; the first coefficient is less than the first initial coefficient. If the rolling speed is greater than or equal to the second threshold and less than the third threshold, the first driving current proportional coefficient is the second coefficient; the second coefficient is less than the first coefficient. If the rolling speed is greater than or equal to the third threshold and less than the fourth threshold, the first driving current proportional coefficient is the third coefficient; the third coefficient is less than the second coefficient. If the rolling speed is greater than or equal to the fourth threshold, the first driving current proportional coefficient is the fourth coefficient; the fourth coefficient is less than the third coefficient.

7. The strip rolling method according to claim 6, characterized in that, If the rolling speed is less than or equal to the first threshold, the first driving current proportional coefficient is redefined as the first initial coefficient. If the rolling speed is greater than the first threshold and less than the second threshold, the first driving current proportional coefficient is redefined as the fifth coefficient; the fifth coefficient is less than the first coefficient. If the rolling speed is greater than or equal to the second threshold and less than the third threshold, the first driving current proportional coefficient is redefined as the sixth coefficient. The sixth coefficient is less than the second coefficient; If the rolling speed is greater than or equal to the third threshold and less than the fourth threshold, the first driving current proportional coefficient is redefined as the seventh coefficient. The seventh coefficient is less than the third coefficient; If the rolling speed is greater than or equal to the fourth threshold, the first driving current proportional coefficient is redefined as the eighth coefficient. The eighth coefficient is less than the fourth coefficient.

8. The strip rolling method according to claim 4, characterized in that, If the rolling speed is less than or equal to the fifth threshold, the second driving current proportional coefficient is the second initial coefficient; If the rolling speed is greater than the fifth threshold and less than the sixth threshold, the second driving current proportional coefficient is the ninth coefficient; the ninth coefficient is less than the second initial coefficient. If the rolling speed is greater than or equal to the sixth threshold and less than the seventh threshold, the second driving current proportional coefficient is the tenth coefficient; The tenth coefficient is less than the ninth coefficient; If the rolling speed is greater than or equal to the seventh threshold and less than the eighth threshold, the second drive current proportional coefficient is the eleventh coefficient; the eleventh coefficient is less than the tenth coefficient. If the rolling speed is greater than or equal to the eighth threshold, the second driving current proportional coefficient is the twelfth coefficient; the twelfth coefficient is less than the eleventh coefficient.

9. The strip rolling method according to claim 4, characterized in that, If the rolling speed is less than or equal to the ninth threshold, the third driving current proportional coefficient is the third initial coefficient; If the rolling speed is greater than the ninth threshold and less than the tenth threshold, the third driving current proportional coefficient is the thirteenth coefficient; the thirteenth coefficient is less than the third initial coefficient. If the rolling speed is greater than or equal to the tenth threshold and less than the eleventh threshold, the third drive current proportional coefficient is the fourteenth coefficient; the fourteenth coefficient is less than the thirteenth coefficient. If the rolling speed is greater than or equal to the eleventh threshold and less than the twelfth threshold, the third driving current proportional coefficient is the fifteenth coefficient; The fifteenth coefficient is less than the fourteenth coefficient; If the rolling speed is greater than or equal to the twelfth threshold, the third driving current proportional coefficient is the sixteenth coefficient; the sixteenth coefficient is less than the fifteenth coefficient.

10. A strip rolling apparatus, characterized in that, include: The data acquisition module is used to acquire the rolling speed and the tension deviation between the first and second vibrating stands during the strip rolling process. Both the first vibrating stand and the second vibrating stand are stands of the rolling mill. The rolling sequence of the first vibrating stand is before that of the second vibrating stand. The tension deviation value is the deviation between the reference tension value and the actual tension value. The determining module is used to determine the target roll gap adjustment value of the first vibrating stand based on the rolling speed and the tension deviation value; The rolling module is used to continue rolling the strip steel based on the target roll gap adjustment value and the first drive current proportional coefficient, so as to reduce the probability of vibration of the rolling mill. The first proportional coefficient is the proportional coefficient of the driving current of the hydraulic pressing system of the first vibrating frame.

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