CN115338270A - Finishing roll gap control method for hot rolling production line under single equipment failure - Google Patents

Abstract

The embodiment of the invention provides a method for controlling a finish rolling gap of a hot rolling production line under the condition of single equipment failure, which comprises the following steps: detecting that the clutch fails or detecting that one of the transmission side motor and the operation side motor fails; when the clutch or one of the motor at the transmission side and the motor at the operation side breaks down, the finish rolling pressing system can still accurately control the synchronous displacement of the roll gaps at the operation side and the transmission side.

Description

Finishing roll gap control method for hot rolling production line under single equipment failure

Technical Field

The invention relates to the field of finish rolling electric pressing of hot rolled strips, in particular to a finish rolling roll gap control method of a hot rolling production line under the condition of single equipment failure.

Background

In a finish rolling control system of a hot rolled strip factory, an electric and hydraulic mode is adopted for roll gap closed-loop control, the electric main function is to pre-swing a roll gap, the hydraulic main function is to quickly adjust the roll gap in the process of rolling strip steel so as to ensure the thickness of the strip steel, the roll gap control is divided into an operation side and a transmission side, and when synchronous shifting of the two sides is required, a middle clutch is closed, so that a motor shaft of the operation side and a motor shaft of the transmission side are tightly held, and absolute synchronous shifting of the roll gap is carried out. When roll gaps on two sides need to be adjusted, a clutch in the middle of a motor needs to be separated, so that an operation side and a transmission side can independently move, the effect of adjusting the roll gap difference is achieved, and the mechanical synchronization is adopted in the control mode to ensure the roll gap synchronization. The electric control mainly adopts a master-slave control mode for pressing down the motors at two sides, namely, when the synchronous walking is carried out, the main motor is controlled in a speed ring and a torque ring, and the slave motor receives a torque signal of the main motor to carry out pure torque control. Although this control approach is well established. The following problems still occur, (1) the clutch has internal slip phenomenon during the closing work, so that the roll gap has deviation, and synchronous shifting cannot be realized. Eventually, the need to replace the clutch results in a forced shut down of the production line. (2) The damage of the motor under a certain lateral pressure causes that the master-slave control mode of the original motor cannot be realized, the ready signal is not satisfied, and the like, and finally the motor is forced to be shut down and replaced. Therefore, there is a need for an improved optimization of the control system of the reduction clutch, which prevents forced stoppage of the machine in the event of a malfunction, and which has an emergency production measure

In the process of implementing the invention, the applicant finds that at least the following problems exist in the prior art:

the problem that the production line is forced to stop when a clutch or a motor under a certain side pressure is damaged in the finish roll seam closed-loop control of the hot rolled plate strip.

Disclosure of Invention

The embodiment of the invention provides a hot rolling production line finishing roll gap control method under the single equipment failure, which solves the problem that the production line is forced to stop when a clutch or a motor under certain side pressure is damaged in the finishing roll gap closed-loop control of a hot rolling plate strip.

In order to achieve the above object, in one aspect, an embodiment of the present invention provides a method for controlling a finishing roll gap of a hot rolling line in a single equipment failure, including:

detecting that the clutch fails or detecting that one of the transmission side motor and the operation side motor fails;

clutch-less control mode: when the clutch fails, the working modes of the motor at the transmission side and the motor at the operation side are set to be independent main modes from the main mode to the slave mode, and the speed of the motor at the transmission side is compensated in real time according to the deviation value of the roll gap at the transmission side and the roll gap at the operation side, so that the roll gap at the transmission side and the roll gap at the operation side synchronously move;

single-press mode: when one of the transmission side motor and the operation side motor becomes a fault motor due to a fault, taking a fault-free motor of the transmission side motor and the operation side motor as a commissioning motor, setting the commissioning motor as a main mode, controlling the commissioning motor to drive the fault motor to synchronously run through closing of the clutch, and enabling the transmission side roll gap and the operation side roll gap to synchronously move;

wherein the clutchless control mode and the single reduction mode do not occur simultaneously.

Further, the real-time compensation to the motor on the transmission side according to the deviation value of the roll gap on the transmission side and the roll gap on the operation side to enable the roll gap on the transmission side and the roll gap on the operation side to synchronously move comprises the following steps:

when the clutch breaks down, recording a deviation value of a transmission side roll gap and an operation side roll gap as an initial deviation value;

detecting real-time deviation values of a transmission side roll gap and an operation side roll gap in real time in the process of respectively and independently controlling the transmission side roll gap and the operation side roll gap to move through a transmission side motor and an operation side motor;

and controlling the real-time deviation value to be always kept as the initial deviation value through the speed of the real-time compensation transmission side motor.

Further, the controlling the real-time deviation value to be always maintained as the initial deviation value by compensating the speed of the transmission side motor in real time includes:

when the real-time deviation value increases, the speed of the transmission side motor is reduced.

Further, under the single-pressing mode, still include:

and after the roll gap on the transmission side and the roll gap on the operation side are pre-swung into place, performing real-time adjustment control on the roll gap through the hydraulic roll gap.

Further, the method further comprises: the transmission side motor drives the transmission side hydraulic cylinder to complete transmission side roll gap adjustment, and the operation side motor drives the operation side hydraulic cylinder to complete operation side roll gap adjustment.

Further, the method further comprises: a transmission side roll gap detection device is installed on the transmission side, and an operation side roll gap detection device is installed on the operation side.

Further, the method further comprises: an operation interface is arranged;

a single reduction mode and a clutchless mode selection control are provided in the operator interface for each finishing stand.

Further, the method further comprises:

when the clutch has a slip fault to cause deviation between a roll gap on the transmission side and a roll gap on the operation side, a clutch-free control mode is put into an operation interface to enable a finishing mill rack pressing-down system corresponding to the slip fault of the clutch to enter a clutch-free control mode;

the clutch-free control mode specifically comprises: the control modes of the transmission side motor and the operation side motor are automatically switched from a master-slave mode to respective independent master-slave mode; compensating the speed of a motor at the transmission side in real time according to the deviation value of the roll gap at the transmission side and the roll gap at the operation side obtained by real-time measurement in the synchronous walking process of the transmission side and the operation side by taking the deviation value of the roll gap at the transmission side and the roll gap at the operation side as reference;

the real-time compensation of the speed of the motor at the transmission side is carried out according to the deviation value of the roll gap at the transmission side and the roll gap at the operation side, which is obtained through real-time measurement, and the method specifically comprises the following steps: when the deviation value of the roll gap at the transmission side and the roll gap at the operation side obtained by real-time measurement is increased, the speed of a motor at the transmission side is reduced, so that the deviation value of the roll gap at the transmission side and the roll gap at the operation side is reduced, and finally the roll gap at the transmission side and the roll gap at the operation side after synchronous shifting are controlled in the range before shifting, so that the synchronous shifting of the roll gap at the transmission side and the roll gap at the operation side is realized;

when one of the transmission side motor and the operation side motor breaks down, a single pressing mode is selected through an operation interface, the commissioning motor is automatically changed into a main mode to be controlled, and the commissioning motor drives the fault motor to realize mechanical synchronous operation through closing of a clutch during synchronous displacement; wherein, the commissioning motor is a fault-free motor of one of a transmission side motor and an operation side motor; the fault motor is a motor with a fault in one of the transmission side motor and the operation side motor;

wherein the single depression mode and the clutchless control mode are not used simultaneously.

The technical scheme has the following beneficial effects: the roll gap shifting under finish rolling can be still completed when one of a clutch or a single-side motor of a finish rolling reduction system breaks down through a clutch-free mode and a single reduction mode, so that the production line halt caused by single failure in the finish rolling reduction system is avoided, and the production safety and efficiency are improved. Furthermore, software programming and interface system development are adopted, rapid switching is provided for operators, when a single device fails, corresponding modes are put into use according to the failures on site, and the downtime generated when the failures of the clutch and the motor in the system are pressed down is controlled greatly. The prior art is forced to stop as long as the fault occurs, and the breakthrough that the single equipment can still normally produce is realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a flowchart of a method for controlling a finishing roll gap of a hot rolling line in the event of a single equipment failure according to one embodiment of the present invention;

FIG. 2 is a schematic diagram of a finishing mill roll gap control system according to one embodiment of the present invention;

FIG. 3 is a schematic view of an operation interface according to an embodiment of the present invention;

FIG. 4 is a flow chart of the drive side down motor speed compensation in accordance with one embodiment of the present invention;

the reference numerals are represented as:

1: a transmission-side motor;

11: a transmission side roll gap detection device;

12: a transmission side speed reducer;

13: the transmission side presses the lower screw rod;

14: a transmission side oil cylinder;

15: a transmission side roll gap;

2: an operation-side motor;

21: operating a side roll gap detection device;

22: an operation-side speed reducer;

23: pressing a lower screw rod by operating side;

24: an operation side oil cylinder;

25: operating a side roll gap;

3: a clutch;

4: an upper support roller;

5: an upper work roll;

6: a lower working roll;

7: a lower support roll;

s1: a comprehensive speed compensation switch;

s2: and finally the speed compensation switch.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, an embodiment of the present invention provides a method for controlling a finishing roll gap of a hot rolling line in a single equipment failure, which is characterized by including:

step S100, detecting that a clutch fails or detecting that one of a transmission side motor and an operation side motor fails;

step S101, no clutch control mode: when the clutch breaks down, the working modes of the motor at the transmission side and the motor at the operation side are set to be independent main modes from the main mode and the slave mode, and the speed of the motor at the transmission side is compensated in real time according to the deviation value of the roll gap at the transmission side and the roll gap at the operation side, so that the roll gap at the transmission side and the roll gap at the operation side synchronously move;

step S102, single-press mode: when one of the transmission side motor and the operation side motor becomes a fault motor due to a fault, taking a fault-free motor of the transmission side motor and the operation side motor as a commissioning motor, setting the commissioning motor as a main mode, controlling the commissioning motor to drive the fault motor to synchronously run through closing of the clutch, and enabling the transmission side roll gap and the operation side roll gap to synchronously move;

wherein the clutchless control mode and the single reduction mode do not occur simultaneously.

In some embodiments, as shown in fig. 2, the transmission-side motor 1 is connected to the operation-side motor 2 through a clutch 3; the transmission side motor 1 drives a transmission side speed reducer 12, the transmission side speed reducer 12 drives a transmission side pressure lower screw rod 13, the transmission side pressure lower screw rod 13 drives a transmission side oil cylinder 14, and the transmission side oil cylinder 14 drives one side of the transmission side of the upper supporting roll to drive one side of the transmission side of the upper working roll to move so as to change a transmission side roll gap 15; the operation side motor 2 drives the operation side speed reducer 22, the operation side speed reducer 22 drives the operation side pressing screw 23, the operation side pressing screw 23 drives the operation side oil cylinder 24, and the operation side oil cylinder 24 drives the operation side of the upper supporting roll to drive the operation side of the upper working roll to move, so that the operation side roll gap 25 is changed; the lower support rollers 7 are located on the ground for supporting the lower work rolls 6. The failure of the clutch or the failure of one of the transmission side motor and the operation side motor can be judged manually, and the failure of the clutch or the failure of one of the transmission side motor and the operation side motor can be detected through a software control sensor and the like; the clutch-free control mode is used for solving the problem that when the clutch of the finish rolling pressing system has faults including but not limited to slipping and the like, the roll gaps on two sides (a transmission side and an operation side) cannot deviate due to the fact that machinery cannot walk synchronously, the effect that the roll gaps on the two sides can synchronously walk even if the clutch is not adopted is achieved, and finally the requirement of production working conditions is met. The single-pressing mode is used for flexibly changing the master-slave control mode of the motor into the master control mode when the motor fails to be used under a certain side pressure of finish rolling, and the clutch drives the motor at the failure side to perform a mechanical synchronous displacement function, so that the production requirement can be finally met. It is worth noting that the clutch-less control mode and the single-press mode cannot be used simultaneously, i.e. the clutch or the motor on one side can only be damaged the same, and if both are damaged, only the process can be stopped. In the normal production process, the situation that two devices simultaneously fail is still less, so the embodiment of the invention is suitable for emergency use when a single device in a pressing system fails, and the production purpose is achieved.

The embodiment of the invention has the following technical effects: the roll gap shifting under finish rolling can be still completed when one of a clutch or a single-side motor of a finish rolling reduction system breaks down through a clutch-free mode and a single reduction mode, so that the production line halt caused by single failure in the finish rolling reduction system is avoided, and the production safety and efficiency are improved.

Further, the real-time compensation to the motor on the transmission side according to the deviation value of the roll gap on the transmission side and the roll gap on the operation side to enable the roll gap on the transmission side and the roll gap on the operation side to synchronously move comprises the following steps:

when the clutch breaks down, recording a deviation value of a transmission side roll gap and an operation side roll gap as an initial deviation value;

respectively and independently controlling the roll gap at the transmission side and the roll gap at the operation side through a motor at the transmission side and a motor at the operation side, and detecting the real-time deviation value of the roll gap at the transmission side and the roll gap at the operation side in real time;

and controlling the real-time deviation value to be always kept as the initial deviation value through the speed of the real-time compensation transmission side motor.

In some embodiments, when the system automatically detects or manually detects that the slip fault of the clutch causes deviation of the roll gap between the two sides, the system automatically or manually puts the clutch-free control mode on the operation interface, and in some specific embodiments, as shown in fig. 4, the final speed compensation switch S2 is set to 0 to allow final speed compensation, and the integrated speed compensation switch S1 is set to 0 to allow integrated speed compensation, and then the system enters the clutch-free control mode. The control modes of the transmission side motor and the operation side motor automatically enter into respective independent main modes from the master-slave mode. The method is implemented by software, wherein the difference value of the roll gaps of the two sides is used as reference, the speed of the motor at the transmission side is compensated in real time according to the size of the roll gap deviation value in the synchronous moving process of the two sides, and specifically, the speed of the motor at the transmission side can be compensated by methods including but not limited to a PI regulator or a PID regulator shown in FIG. 4; and (3) recording a difference value (namely an initial deviation value or a roll gap deviation given value in figure 4) of roll gaps on two sides at the time of starting synchronous shifting, and compensating the other side in real time in the shifting process to enable the roll gap deviation value (namely a real-time deviation value or roll gap deviation feedback) on the two sides to be always kept at the difference value (namely the initial deviation value or the roll gap deviation given value in figure 4) of the starting time of the motor, so that the synchronism before and after shifting is realized.

The embodiment of the invention has the following technical effects: when the clutch fails, the motors on the two sides can be independently controlled to respectively control the roll gaps on the two sides to move, deviation values of the roll gaps on the two sides are recorded as initial deviation values when the two sides just start to move, and real-time deviation values of the roll gaps on the two sides are kept consistent with the initial deviation values by controlling the motors on the two sides in a subsequent main mode, so that the roll gaps on the two sides can be moved synchronously, the roll gaps on the two sides can be accurately and completely moved even if the clutch fails, and the effect of improving the stability and the efficiency of a production line is achieved.

Further, the controlling the real-time deviation value to be always maintained as the initial deviation value by compensating the speed of the transmission side motor in real time includes:

when the real-time deviation value increases, the speed of the transmission side motor is reduced.

In some embodiments, when the deviation value of the roll gaps on the two sides is increased, that is, the roll gaps on the two sides are not shifted synchronously, the speed setting of the motor on the transmission side can be reduced slightly, so that the deviation value of the roll gaps on the two sides is also reduced, and the final purpose is to control the deviation value of the roll gaps after the two sides are shifted synchronously within the range of the initial deviation value before the shifting, so as to realize the synchronous shifting of the roll gaps on the two sides.

Further, in the single-press mode, the method further comprises the following steps:

and after the roll gap on the transmission side and the roll gap on the operation side are pre-swung into place, performing real-time adjustment control on the roll gap through the hydraulic roll gap.

In some embodiments, the pressing system adopts an electric and hydraulic roll gap control mode, the transmission side oil cylinder 14 and the operation side oil cylinder 24 are hydraulic cylinders as shown in fig. 2, electric is used for performing coarse pre-swing through a large roll gap stroke, and the hydraulic roll gap is only used for fine adjustment after the electric pre-swing. Preferably, during the rolling of the strip, the motorized roll gap is stationary and the hydraulic roll gap is used to adjust the profile. When the motor fails at a certain lateral pressure, an operator selects a single-pressure mode on an operation interface, the motor used at the moment is automatically changed into a main mode for control, and the clutch is closed to drive the failed motor to realize mechanical synchronous operation when the motor synchronously moves; after a single-side motor (a transmission-side motor or an operation-side motor) breaks down, a motor without faults is used as a commissioning motor, the commissioning motor is used for driving the motor with faults to synchronously rotate through the closing of a clutch, the running of roll gaps on two sides is realized, in order to keep the total running stroke to be synchronous with high precision, after the roll gaps on the transmission side and the roll gaps on the operation side are pre-swung to the position, the roll gaps are finely adjusted through hydraulic roll gaps, and the effect of accurately synchronously running the roll gaps on two sides can be still realized according to the requirements of a production line when the single-side motor breaks down.

Furthermore, the transmission side motor drives the transmission side hydraulic cylinder to complete transmission side roll gap adjustment, and the operation side motor drives the operation side hydraulic cylinder to complete operation side roll gap adjustment.

In some embodiments, the roll gap adjustment of the operation side or the transmission side in the pressing system is completed by electric liquid pressure adding, and the roll gap leveling can be carried out by synchronously lifting or pressing and single-acting single side.

Further, a drive side roll gap detection device is mounted on the drive side, and an operation side roll gap detection device is mounted on the operation side.

In some embodiments, the roll gap detection devices are installed on both sides, the difference value of the roll gaps on both sides is detected by the roll gap detection devices on both sides as an initial deviation value of the running position, when the clutch-free mode is applied, the roll gap deviation value on both sides is recorded by the roll gap detection devices on both sides at the initial moment as an initial deviation value, and then the real-time deviation value measured by the roll gap detection devices on both sides in real time is always within the initial deviation value range by compensating the speed of the motor in real time.

Further, as shown in fig. 3, an operation interface is provided;

a single reduction mode and a clutchless mode selection control are provided in the operator interface for each finishing stand.

In some embodiments, the single reduction mode and the clutchless mode are manually selectable by an operator for each finishing stand depending on the site specifications by providing an operator interface. In fig. 3, a single-push mode and a clutch-less mode are set for six finishing mill stands F1 to F6, respectively, each finishing mill stand corresponds to two buttons, and an operation explanation is set below the button area, and when equipment fails, the corresponding stand selects the corresponding mode. The corresponding button turns red after selection, and is white otherwise.

Further, the method further comprises:

when the slip fault of the clutch causes deviation between a roll gap on the transmission side and a roll gap on the operation side, a clutch-free control mode is put into an operation interface, so that a pressing system of a finish rolling rack corresponding to the slip fault of the clutch enters a clutch-free control mode;

the clutch-free control mode specifically comprises: the control modes of the transmission side motor and the operation side motor are automatically switched from a master-slave mode to respective independent master-slave mode; compensating the speed of a motor at the transmission side in real time according to the deviation value of the roll gap at the transmission side and the roll gap at the operation side obtained by real-time measurement in the synchronous walking process of the transmission side and the operation side by taking the deviation value of the roll gap at the transmission side and the roll gap at the operation side as reference;

the real-time compensation of the speed of the motor at the transmission side is carried out according to the deviation value of the roll gap at the transmission side and the roll gap at the operation side, which is obtained through real-time measurement, and the method specifically comprises the following steps: when the deviation value of the roll gap at the transmission side and the roll gap at the operation side obtained by real-time measurement is increased, the speed of a motor at the transmission side is reduced, so that the deviation value of the roll gap at the transmission side and the roll gap at the operation side is reduced, and finally the roll gap at the transmission side and the roll gap at the operation side after synchronous shifting are controlled in the range before shifting, so that the synchronous shifting of the roll gap at the transmission side and the roll gap at the operation side is realized;

when one of the transmission side motor and the operation side motor breaks down, a single pressing mode is selected through an operation interface, the commissioning motor is automatically changed into a main mode to be controlled, and the commissioning motor drives the fault motor to realize mechanical synchronous operation through closing of a clutch during synchronous walking; wherein, the commissioning motor is a fault-free motor which is one of a transmission side motor and an operation side motor; the fault motor is a motor with a fault in one of the transmission side motor and the operation side motor;

wherein the single depression mode and the clutchless control mode are not used simultaneously.

The embodiments of the present invention can be understood from the foregoing embodiments, and will not be described herein again.

The embodiment of the invention has the following technical effects: the roll gap shifting under finish rolling can be still completed when one of a clutch or a single-side motor of a finish rolling reduction system breaks down through a clutch-free mode and a single reduction mode, so that the production line halt caused by single failure in the finish rolling reduction system is avoided, and the production safety and efficiency are improved. Furthermore, software programming and interface system development are adopted, rapid switching is provided for operators, when a single device fails, corresponding modes are put into use according to the failures on site, and the downtime generated when the clutch and the motor in the system are pressed down is controlled greatly. The prior art is forced to stop as long as the fault occurs, and the breakthrough that the single equipment can still normally produce is realized.

It should be understood that the specific order or hierarchy of steps in the processes disclosed is an example of exemplary approaches. Based upon design preferences, it is understood that the specific order or hierarchy of steps in the processes may be rearranged without departing from the scope of the present disclosure. The accompanying method claims present elements of the various steps in a sample order, and are not meant to be limited to the specific order or hierarchy presented.

In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, invention lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. To those skilled in the art; various modifications to these embodiments will be readily apparent, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising: as interpreted by the use of "in the claims as a conjunction. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (8)

1. A hot rolling production line finishing roll gap control method under the single equipment failure is characterized by comprising the following steps:

detecting that the clutch fails or detecting that one of the transmission side motor and the operation side motor fails;

clutch-less control mode: when the clutch fails, the working modes of the motor at the transmission side and the motor at the operation side are set to be independent main modes from the main mode to the slave mode, and the speed of the motor at the transmission side is compensated in real time according to the deviation value of the roll gap at the transmission side and the roll gap at the operation side, so that the roll gap at the transmission side and the roll gap at the operation side synchronously move;

single press mode: when one of the transmission side motor and the operation side motor becomes a fault motor due to fault, taking a fault-free motor in the transmission side motor and the operation side motor as a commissioning motor, setting the commissioning motor as a main mode, controlling the commissioning motor to drive the fault motor to synchronously run through closing of the clutch, and enabling the transmission side roll gap and the operation side roll gap to synchronously move;

wherein the clutchless control mode and the single reduction mode do not occur simultaneously.

2. The method for controlling the finishing roll gap of the hot rolling production line under the single equipment failure according to claim 1, wherein the step of compensating the motor at the transmission side in real time according to the deviation value of the roll gap at the transmission side and the roll gap at the operation side to enable the roll gap at the transmission side and the roll gap at the operation side to move synchronously comprises the following steps:

when the clutch breaks down, recording a deviation value of a transmission side roll gap and an operation side roll gap as an initial deviation value;

respectively and independently controlling the roll gap at the transmission side and the roll gap at the operation side through a motor at the transmission side and a motor at the operation side, and detecting the real-time deviation value of the roll gap at the transmission side and the roll gap at the operation side in real time;

and controlling the real-time deviation value to be always kept as the initial deviation value through the speed of the real-time compensation transmission side motor.

3. The finishing roll gap control method for a hot rolling line in the event of a single plant failure as set forth in claim 2, wherein said controlling the real-time deviation value to be always the initial deviation value by compensating the speed of the driving side motor in real time comprises:

when the real-time deviation value increases, the speed of the transmission side motor is reduced.

4. The method for controlling a finishing roll gap of a hot rolling line in the event of a single-piece plant failure according to claim 1, further comprising, in a single reduction mode:

and after the roll gap at the transmission side and the roll gap at the operation side are pre-swung into place, performing real-time adjustment control on the roll gap through the hydraulic roll gap.

5. The finishing roll gap control method for a hot rolling line under the single equipment failure according to claim 1, characterized in that the roll gap adjustment at the transmission side is accomplished by driving the hydraulic cylinder at the transmission side by the motor at the transmission side, and the roll gap adjustment at the operation side is accomplished by driving the hydraulic cylinder at the operation side by the motor at the operation side.

6. The finishing roll gap control method for a hot rolling line in the event of a stand-alone facility failure according to claim 2, wherein a drive-side roll gap detecting device is installed on the drive side, and an operation-side roll gap detecting device is installed on the operation side.

7. The method for controlling the finish rolling gap of the hot rolling production line under the single equipment failure according to claim 1, characterized in that an operation interface is provided;

a single reduction mode and a clutchless mode selection control are provided in the operating interface for each finishing stand.

8. The method for controlling the finishing roll gap of the hot rolling line in the single equipment failure according to claim 1, comprising:

when the slip fault of the clutch causes deviation between a roll gap on the transmission side and a roll gap on the operation side, a clutch-free control mode is put into an operation interface, so that a pressing system of a finish rolling rack corresponding to the slip fault of the clutch enters a clutch-free control mode;

the clutchless control mode specifically comprises: the control modes of the transmission side motor and the operation side motor are automatically switched from a master-slave mode to respective independent master-slave mode; compensating the speed of a motor at the transmission side in real time according to the deviation value of the roll gap at the transmission side and the roll gap at the operation side obtained by real-time measurement in the synchronous walking process of the transmission side and the operation side by taking the deviation value of the roll gap at the transmission side and the roll gap at the operation side as reference;

the real-time compensation of the speed of the motor at the transmission side is carried out according to the deviation value of the roll gap at the transmission side and the roll gap at the operation side, which is obtained through real-time measurement, and the method specifically comprises the following steps: when the deviation value of the roll gap at the transmission side and the roll gap at the operation side obtained by real-time measurement is increased, the speed of a motor at the transmission side is reduced, so that the deviation value of the roll gap at the transmission side and the roll gap at the operation side is reduced, and finally the roll gap at the transmission side and the roll gap at the operation side after synchronous shifting are controlled in the range before shifting, so that the synchronous shifting of the roll gap at the transmission side and the roll gap at the operation side is realized;

when one of the transmission side motor and the operation side motor breaks down, a single pressing mode is selected through an operation interface, the commissioning motor is automatically changed into a main mode to be controlled, and the commissioning motor drives the fault motor to realize mechanical synchronous operation through closing of a clutch during synchronous displacement; wherein, the commissioning motor is a fault-free motor of one of a transmission side motor and an operation side motor; the fault motor is a motor with a fault in one of the transmission side motor and the operation side motor;

wherein, the single pressing mode and the clutch-free control mode are not used simultaneously.

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