Method and system for controlling chase shearing of strip-steel transverse cutting line

Abstract

The present disclosure belongs to the technical field of control over strip-steel transverse cutting lines. Specifically, provided are a method and system for controlling chase shearing of a strip-steel transverse cutting line. The method comprises: on the basis of an operating speed of a line and the shortest acceleration distance, calculating the acceleration during chasing of chase shearing; if the acceleration is greater than the maximum acceleration during chase-shearing acceleration which is preset by a program, cyclically and incrementally decreasing the operating speed of the line by a preset value and using same as the current operating speed of the line; on the basis of set parameters and the current state of a shearing task, calculating an optimized speed for returning to an original point after shearing; and dynamically adjusting a shearing return speed, such that the actual total time of a shearing process is closer to a predicted total time. By means of the present solution, the precise position control of chase shearing and the precise steel-plate shearing size control are realized. On the basis of changeable parameters and in combination with a set shear data model prediction and control strategy, the precise synchronized shearing of strip steel is realized by means of controlling the position and speed of chase shearing, thereby improving the stability and prolonging the service life of a device.

Description

A control method and system for follow-up shearing of a strip cross-cutting unit Technical Field

[0001] The present disclosure relates to the technical field of control of a strip steel cross-cutting unit, and in particular to a control method and system for follow-up shearing of a strip steel cross-cutting unit. Background Art

[0002] The metallurgical industry's strip shearing units primarily cut steel to a user-defined length. The shearing equipment primarily consists of a shearing mechanism, a servo travel mechanism, and a measuring roller mechanism.

[0003] Traditional cross-cutting machines only allow users to enter parameters such as cutting length and number of cuts. Regardless of the machine's speed, the machine will operate at preset maximum acceleration and return speeds. These preset acceleration and return speeds are generally high, and are not required for producing certain strip specifications. Preset maximum acceleration and return speeds can have a significant impact on the equipment, shortening its service life.

[0004] Summary of the Invention

[0005] The present disclosure aims to solve at least one of the technical problems existing in the prior art, and proposes a control method and system for the follow-up shearing of a strip cross-cutting machine unit.

[0006] In a first aspect, the present disclosure provides a method for controlling the shearing of a strip cross-cutting unit, comprising:

[0007] S1, the unit operating speed is obtained based on the shear length and shear speed;

[0008] S2, calculating the acceleration of the shearing during the catching-up process based on the unit's operating speed and the shortest acceleration distance; if the acceleration is not greater than the maximum acceleration of the shearing during the catching-up process preset by the program, the unit is operating normally; otherwise, the preset value is cyclically decremented as the current unit operating speed;

[0009] S3, based on the set parameters of the shearing task, calculates the theoretical position of each sheared steel plate, monitors the current steel plate position in real time, and compares it with the encoder position feedback from the unit speed roller. If the deviation exceeds the set alarm deviation, an HMI alarm prompts an inspection;

[0010] S4, based on the set parameters and current status of the shearing task, calculates the optimized return speed after shearing; by dynamically adjusting the shearing return speed, the actual total time of the shearing process is made closer to the expected total time.

[0011] Preferably, the S1 specifically includes:

[0012] If the expected operating speed of the unit is greater than the maximum operating speed of the unit, the final operating speed of the unit is the maximum operating speed of the unit; otherwise, the final operating speed of the unit is the expected operating speed of the unit.

[0013] Preferably, the S2 specifically includes:

[0014] If the acceleration is greater than the maximum acceleration of the shear acceleration preset by the program, the unit's operating speed is controlled to decrease by a speed decrement value preset by the program as the current unit's operating speed, and the acceleration of the shear during catching up is calculated based on the current unit's operating speed and the shortest acceleration distance as the current acceleration; if the current acceleration is still greater than the maximum acceleration of the shear acceleration preset by the program after comparison, the unit cannot operate.

[0015] Preferably, the S2 specifically includes:

[0016] When the unit is not operational, the user is prompted to modify the set speed of the unit or the set shear speed.

[0017] Preferably, the S3 specifically includes:

[0018] If the deviation exceeds the set fault deviation, the HMI alarm prompts to check the encoder, and the unit stops when it receives this signal.

[0019] Preferably, the S3 specifically includes:

[0020] After the prompt appears, check the encoder of the measuring roller. If there is slippage, you need to wipe the measuring wheel or adjust the air pressure of the measuring wheel according to the on-site situation, or check the encoder wiring and whether the encoder is normal, so as to minimize the error of the shearing position and ensure the accuracy and quality of the shearing.

[0021] Preferably, the S3 specifically includes:

[0022] Actual value of the speed of the unit speed roller (m / s): V masteractspeed The time from each cut to the next cut is t(s); the position of each cut is recorded as P axixslavecutpoint ; Calculate the distance traveled by the current strip as (mm) S axixmasterexppos ;but The actual distance (mm) traveled by the steel plate measured by the measuring wheel is: S axixmasteractpos ; When the alarm value is 50mm, if |S axixmasteractpos -S axixmasterexppos |≤50.0, the program considers it normal and POS_ERROR is 0; if |S axixmasteractpos -S axixmasterexppos |>50.0, the program outputs an alarm and POS_ERROR is 1.

[0023] Preferably, the S4 specifically includes:

[0024] Maximum positive travel of shearing (mm):

[0025] Maximum return speed set by the user (m / min): V backmaxspeed ;

[0026] The maximum acceleration of the shear return preset in the program (mm / s 2 )A namax ;

[0027] The uniform speed distance during the shear return is (mm): S backwithmaxspeed ;

[0028] If the uniform speed distance S backwithmaxspeed <0, it will automatically execute n times of maximum return speed deceleration:

[0029] The final maximum return speed is V n backmaxspeed=V backmaxspeed -n*V speeddec

[0030] The uniform speed distance until the nth shearing return

[0031] The present invention also provides a control system for the follow-up shearing of a strip steel cross-cutting unit, which can be used to implement the control method for the follow-up shearing of the strip steel cross-cutting unit. The system includes:

[0032] a unit operating speed acquisition module configured to obtain the unit operating speed based on the shear length and the shear speed;

[0033] The speed update module is configured to calculate the acceleration of the shearing during the catching-up process according to the unit's operating speed and the shortest acceleration distance; if the acceleration is not greater than the maximum acceleration of the shearing during the catching-up process preset by the program, the unit operates normally; otherwise, the preset value is cyclically decremented as the current unit operating speed;

[0034] The position deviation alarm module is configured to calculate the theoretical position of each sheared steel plate based on the set parameters of the shearing task, monitor the current steel plate position in real time, and compare it with the encoder position feedback from the unit speed roller. If the deviation exceeds the set alarm deviation, an HMI alarm prompts an inspection;

[0035] The return speed control module is configured to calculate the optimized return speed after cutting based on the set parameters and current status of the cutting task; by dynamically adjusting the cutting return speed, the actual total time of the cutting process is made closer to the expected total time.

[0036] The present invention also provides an electronic device, comprising:

[0037] one or more processors;

[0038] a memory for storing one or more programs;

[0039] When the one or more programs are executed by the one or more processors, the one or more processors implement the control method for the follow-up shearing of the strip cross-cutting machine group. Beneficial effects:

[0040] The present invention uses the information fed back by the measuring roller, including the state, speed, position, and the shearing size, acceleration of the tracking shearing, shearing time, and return speed input by the operator, to control the strip steel with high precision, thereby meeting the production requirements of the cross-cutting unit, while reducing the impact on the mechanical equipment, improving the stability of the equipment, and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] FIG1 is a schematic diagram showing the principle of a control method for follow-up shearing of a strip cross-cutting unit provided by an embodiment of the present disclosure;

[0042] FIG2 is a structural block diagram of an electronic device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0044] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the ordinary meaning understood by people with ordinary skills in the field to which this disclosure belongs. The words "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" are not limited to quantity, but rather to the presence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used for relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0045] In each accompanying drawing, identical elements are represented by similar reference numerals. For the sake of clarity, the various parts in the accompanying drawings are not all drawn to scale. In addition, some well-known parts may not be shown in the drawings.

[0046] Many specific details of the present disclosure are described below, such as component structures, materials, dimensions, processing techniques, and technologies, to provide a clearer understanding of the present disclosure. However, as will be appreciated by those skilled in the art, the present disclosure may be implemented without following these specific details.

[0047] As shown in FIG1 , an embodiment of the present invention provides a control method for the follow-up shearing of a strip cross-cutting unit, comprising:

[0048] S1, the unit operating speed is obtained based on the shear length and shear speed;

[0049] S2, calculating the acceleration of the shearing during the catching-up process based on the unit's operating speed and the shortest acceleration distance; if the acceleration is not greater than the maximum acceleration of the shearing during the catching-up process preset by the program, the unit is operating normally; otherwise, the preset value is cyclically decremented as the current unit operating speed;

[0050] S3, based on the set parameters of the shearing task, calculates the theoretical position of each sheared steel plate, monitors the current steel plate position in real time, and compares it with the encoder position feedback from the unit speed roller. If the deviation exceeds the set alarm deviation, an HMI alarm prompts an inspection;

[0051] S4, based on the set parameters and current status of the shearing task, calculates the optimized return speed after shearing; by dynamically adjusting the shearing return speed, the actual total time of the shearing process is made closer to the expected total time.

[0052] It should be noted that the technical solution of the present disclosure does not limit the order of the above steps, that is, the execution order of the steps can be arranged arbitrarily.

[0053] This method uses user-entered parameters to precisely control the strip cutting position while minimizing equipment impact. It is used to dynamically adjust the shear acceleration and shear synchronization position for varying shear lengths and unit speeds.

[0054] The specific implementation steps are as follows:

[0055] (1) Adaptive acceleration control algorithm:

[0056] S1, based on the set cutting length and the set maximum speed of the unit, the return speed of the shearing and shearing, and the cutting time, adapts the required forward acceleration. If it cannot meet the production requirements, such as the calculated forward acceleration is greater than the equipment's limit acceleration, a parameter error is returned and the unit cannot operate. Specifically:

[0057] User-set cutting length (mm): L setcutlength

[0058] User-set shear rate (pieces / minute, ppm): n ppm

[0059] The maximum linear speed of the unit set by the user (m / min): V linemax

[0060] The maximum acceleration of the shear acceleration preset by the program (mm / s 2 ): A pamax

[0061] Program preset shearing time (s): T cut

[0062] Program preset maximum running distance of shearing (mm): S shearmaxpos

[0063] The shortest acceleration distance preset by the program (mm): S shearmaxacclength

[0064] Program preset speed decrement value (m / min): V speeddec

[0065] Unit running speed output by program (m / min): V lineset

[0066] At this time, the program obtains the expected operating speed of the unit (m / min) based on the parameters entered by the user: V lineexpset

[0067]

[0068] The preferred solution, considering the maximum speed of the unit:

[0069] If V lineexpset >V linemax , then the final operating speed of the unit is: V lineset =V linemax

[0070] If V lineexpset ≤V linemax , then the final operating speed of the unit is: V lineset =V lineexpset

[0071] S2, calculate the acceleration of the shearing when catching up according to the unit's operating speed and the shortest acceleration distance; if the acceleration is not greater than the maximum acceleration of the shearing acceleration preset by the program, the unit is operating normally; otherwise, the preset value is cyclically decremented as the current unit operating speed. Specifically, calculate the acceleration of the shearing when catching up according to the unit's operating speed and the shortest acceleration distance (mm / s 2 ):

[0072] If A paset ≤A pamax , the program considers that the normal ERROR is set to FALSE and the unit can operate.

[0073] If A paset >A pamax , the program will automatically execute the first reduction of the unit's final operating speed.

[0074] That is V 1 lineset =V lineset -V speeddec

[0075] The acceleration of the shearing process is obtained again (mm / s 2 ):

[0076] Compare again:

[0077] If A 1 paset ≤A pamax , the program considers that the normal ERROR is set to FALSE and the unit can operate.

[0078] If A 1 paset >A pamax , the program will automatically execute the second time to reduce the final operating speed of the unit.

[0079] That is V 2 lineset =V lineset -V speeddec -V speeddec

[0080] The acceleration of the shearing process is obtained again (mm / s 2 ):

[0081] If A 2 paset ≤A pamax , the program considers that the normal ERROR is set to FALSE and the unit can be operated. 2 paset >Apamax , the program returns the error flag ERROR to TRUE, the unit cannot run, and prompts the user to modify the unit set speed V linemax Or set shear speed n ppm .

[0082] (2) Location warning strategy:

[0083] According to the set parameters of the shearing task, the theoretical position of each sheared steel plate is calculated, the current position of the steel plate is monitored in real time, and compared with the encoder position fed back by the unit's speed roller. If the deviation exceeds the set alarm deviation, the HMI alarm prompts an inspection (alarm); if the deviation exceeds the set fault deviation, the HMI alarm prompts an inspection (fault) of the encoder, and the unit stops when it receives this signal.

[0084] After the prompt appears, you need to check the encoder of the measuring roller. If it may be slipping, you need to wipe the measuring wheel or adjust the air pressure of the measuring wheel according to the on-site situation, or check the encoder wiring and whether the encoder is normal, so as to minimize the error of the shearing position and ensure the accuracy and quality of the shearing.

[0085] Specifically, there are devices in the unit responsible for tension adjustment and speed control, namely the unit speed roller. Actual speed value of the unit speed roller (m / s): V masteractspeed

[0086] The time from each shearing to the next shearing is t(s)

[0087] The position of each cut is recorded as P axixslavecutpoint

[0088] Calculate the distance traveled by the current strip (mm) S axixmasterexppos

[0089] The actual distance (mm) traveled by the steel plate measured by the measuring wheel is: S axixmasteractpos .

[0090] The alarm value is usually 50mm,|S axixmasteractpos -S axixmasterexppos |≤50.0, the program considers it normal and POS_ERROR is 0; if |S axixmasteractpos -S axixmasterexppos |>50.0, the program outputs an alarm and POS_ERROR is 1.

[0091] (3) Adaptive control return speed algorithm:

[0092] Based on the set parameters and current state of the shearing task, the optimized return-to-origin speed after shearing is calculated. By dynamically adjusting the shearing return speed, the actual total shearing process time is brought close to the estimated total time. If the estimated total time is less than the estimated time per piece, the return adaptation parameters are considered normal. These control algorithms and strategies can be adjusted and optimized based on the specific cross-cutting unit and shearing task to meet different production needs and shearing requirements. This adjustment method can reduce the impact of the shearing process on the equipment, thereby extending the equipment life.

[0093] Specifically:

[0094] Maximum positive travel of shearing (mm):

[0095] Maximum return speed set by the user (m / min): V backmaxspeed

[0096] The maximum acceleration of the shear return preset in the program (mm / s 2 )A namax

[0097] The uniform speed distance during the shear return is (mm): S backwithmaxspeed

[0098] If the uniform speed distance S backwithmaxspeed <0, it will automatically execute n times of maximum return speed deceleration:

[0099] The final maximum return speed is V n backmaxspeed=V backmaxspeed -n*V speeddec

[0100] The uniform speed distance until the nth shearing return: S n backwithmaxspeed>0.

[0101] The innovation of this invention is to perform model prediction after the user inputs parameters, and achieve precise control of the shearing by predicting the maximum travel of the shearing and optimizing the target setting. This algorithm has the following advantages:

[0102] Strong adaptability: Based on dynamic models and real-time data, the algorithm can adapt to changes in different plate sizes and unit speeds, and is suitable for different production needs.

[0103] Reduce impact: Accurate shear position control can reduce the impact of electrical and mechanical equipment according to set parameters and extend the service life of the equipment.

[0104] Scalability: The algorithm can be adjusted and improved according to actual conditions to meet the needs of cross-cutting production lines with different mechanical parameters.

[0105] The invention has achieved significant results after being put into use: precise shearing control is achieved, meeting high-precision production requirements, reducing impact on equipment, and extending equipment life. This control method is stable and reliable, with high control accuracy and low failure rate.

[0106] The embodiment of the present invention further provides a control system for the follow-up shearing of a strip steel cross-cutting unit, which can be used to implement the control method for the follow-up shearing of the strip steel cross-cutting unit. The system includes:

[0107] a unit operating speed acquisition module configured to obtain the unit operating speed based on the shear length and the shear speed;

[0108] The speed update module is configured to calculate the acceleration of the shearing during the catching-up process according to the unit's operating speed and the shortest acceleration distance; if the acceleration is not greater than the maximum acceleration of the shearing during the catching-up process preset by the program, the unit operates normally; otherwise, the preset value is cyclically decremented as the current unit operating speed;

[0109] The position deviation alarm module is configured to calculate the theoretical position of each sheared steel plate based on the set parameters of the shearing task, monitor the current steel plate position in real time, and compare it with the encoder position feedback from the unit speed roller. If the deviation exceeds the set alarm deviation, an HMI alarm prompts an inspection;

[0110] The return speed control module is configured to calculate the optimized return speed after cutting based on the set parameters and current status of the cutting task; by dynamically adjusting the cutting return speed, the actual total time of the cutting process is made closer to the expected total time.

[0111] Please refer to FIG2 for a schematic diagram of an embodiment of an electronic device provided by an embodiment of the present disclosure. As shown in FIG2 , an embodiment of the present disclosure provides an electronic device 1300, comprising a memory 1310, a processor 1320, and a computer program 1311 stored in the memory 1310 and executable on the processor 1320. When the processor 1320 executes the computer program 1311, the following steps are implemented: S1, obtaining the unit operating speed based on the shear length and shear speed;

[0112] S2, calculating the acceleration of the shearing during the catching-up process based on the unit's operating speed and the shortest acceleration distance; if the acceleration is not greater than the maximum acceleration of the shearing during the catching-up process preset by the program, the unit is operating normally; otherwise, the preset value is cyclically decremented as the current unit operating speed;

[0113] S3, based on the set parameters of the shearing task, calculates the theoretical position of each sheared steel plate, monitors the current steel plate position in real time, and compares it with the encoder position feedback from the unit speed roller. If the deviation exceeds the set alarm deviation, an HMI alarm prompts an inspection;

[0114] S4, based on the set parameters and current status of the shearing task, calculates the optimized return speed after shearing; by dynamically adjusting the shearing return speed, the actual total time of the shearing process is made closer to the expected total time.

[0115] It should be noted that the computer-readable medium described in the present disclosure may be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or component, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to, an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, device, or component. In the present disclosure, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries computer-readable program code. This propagated data signal may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device. Program code embodied on a computer-readable medium may be transmitted using any suitable medium, including but not limited to wireless, wireline, optical fiber cable, RF, or any suitable combination thereof.

[0116] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment, or a part of code, and the aforementioned module, program segment, or a part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0117] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present disclosure, and such modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A control method for a flying shear of a strip steel transverse cutting unit, characterized in that, Including: S1. Obtain the operating speed of the unit based on the shearing length and shearing speed; S2. Calculate the acceleration during the pursuit shearing according to the operating speed of the unit and the shortest acceleration distance; if the acceleration is not greater than the maximum acceleration during the pursuit shearing preset in the program, the unit operates normally; otherwise, cyclically decrease the preset value as the current operating speed of the unit; S3. Calculate the theoretical position of each sheared steel plate according to the set parameters of the shearing task, monitor the position of the current steel plate in real time, compare it with the encoder position fed back by the unit speed roller, and if the deviation exceeds the set alarm deviation, prompt for inspection through HMI alarm; S4. Calculate the optimized return-to-origin speed after shearing according to the set parameters and current state of the shearing task; make the actual total time of the shearing process closer to the expected total time by dynamically adjusting the shearing return speed.

2. The control method of the flying shear of the strip steel transverse cutting unit according to claim 1, characterized in that, The specific content of S1 includes: If the expected operating speed of the unit is greater than the maximum operating speed of the unit, the final operating speed of the unit is the maximum operating speed of the unit; otherwise, the final operating speed of the unit is the expected operating speed of the unit.

3. The control method of the flying shear of the strip steel transverse cutting unit according to claim 1, characterized in that, The specific content of S2 includes: If the acceleration is greater than the maximum acceleration during the pursuit shearing preset in the program, control the operating speed of the unit to decrease by a preset speed decrease value as the current operating speed of the unit, and calculate the acceleration during the pursuit shearing based on the current operating speed of the unit and the shortest acceleration distance as the current acceleration; if the current acceleration is still greater than the maximum acceleration during the pursuit shearing preset in the program after comparison again, the unit cannot operate.

4. The control method of the flying shear of the strip steel transverse cutting unit according to claim 3, characterized in that, The specific content of S2 includes: When the unit cannot operate, prompt the user to modify the set speed of the unit or the set shearing speed.

5. The control method of the flying shear of the strip steel transverse cutting unit according to claim 1, characterized in that The specific content of S3 includes: If the deviation exceeds the set fault deviation, prompt for inspection of the encoder through HMI alarm, and the unit stops when it receives this signal.

6. The control method of the flying shear of the strip steel transverse cutting unit according to claim 5, characterized in that, The specific content of S3 includes: After the prompt appears, check the encoder of the measuring roller. If there is slippage, it is necessary to wipe the measuring wheel or adjust the air pressure of the measuring wheel pressing or detect the encoder wiring and whether the encoder is normal according to the on-site situation to minimize the error of the shearing position and ensure the shearing accuracy and quality.

7. The control method of the flying shear of the strip steel transverse cutting unit according to claim 6, characterized in that, The specific content of S3 includes: Actual value of the speed of the unit speed roller (m / s): V masteractspeed ; The time from each shearing to the next shearing is t (s); The position of the recorded trailing cut at each shearing is P axixslavecutpoint ; Calculate the distance (mm) S that the current strip has traveled axixmaster exp pos ; Then The distance (mm) actually traveled by the steel plate measured by the measuring wheel is: S axixmasteractpos ; when the alarm value is 50 mm, if |S axixmasteractpos -S axixmaster exp pos | ≤ 50.0, the program considers it normal and POS_ERROR is 0; if |S axixmasteractpos -S axixmaster exp pos | > 50.0, the program outputs an alarm and POS_ERROR is 1.

8. The control method of the flying shear of the strip steel transverse cutting unit according to claim 1, characterized in that, The specific content of S4 includes: Forward maximum stroke of the chasing cut (mm): The maximum return speed (m / min) set by the user: V back max speed ; The maximum acceleration when the program preset chasing and trimming returns (mm / s 2 )A na max ; The distance of the constant speed section during the return of the chasing cut is (mm): S backwith max speed ; If the distance S in the constant-speed section backwith max speed < 0, then automatically perform the deceleration of the maximum return speed n times: The final maximum return speed is V n back max speed=V back max speed -n*V speeddec Uniform section distance until the nth pursuit cut returns 9. A control system for a flying shear of a strip transverse cutting unit, characterized in that, The system can be used to implement the control method for the pursuit shearing of the strip transverse cutting unit described in any one of claims 1 to 8 above. The system includes: A unit operating speed acquisition module configured to obtain the operating speed of the unit based on the shearing length and shearing speed; A speed update module configured to calculate the acceleration during the pursuit shearing according to the operating speed of the unit and the shortest acceleration distance; if the acceleration is not greater than the maximum acceleration during the pursuit shearing preset in the program, the unit operates normally; otherwise, cyclically decrease the preset value as the current operating speed of the unit; A position deviation alarm module configured to calculate the theoretical position of each sheared steel plate according to the set parameters of the shearing task, monitor the position of the current steel plate in real time, compare it with the encoder position fed back by the unit speed roller, and if the deviation exceeds the set alarm deviation, prompt for inspection through HMI alarm; A return speed control module configured to calculate an optimized return-to-origin speed after shearing based on the set parameters and the current state of the shearing task; by dynamically adjusting the shearing return speed, the actual total time of the shearing process is made closer to the expected total time.

10. An electronic device, characterized in that, Comprising: One or more processors; A memory for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the control method of the tandem shearing unit for strip transverse cutting as described in any one of claims 1 to 8.

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