An entry spin cut shear control method, system, device, and storage medium

Abstract

The application provides an entry tail-shearing control method, system, device and storage medium, and relates to the technical field of metallurgical strip steel processing. The method first acquires the tail-shearing set length of the upper passage, activates the upper passage tailless coil control mode when the preset length threshold is met, calculates the positioning operation total stroke based on the fixed equipment distance between the grating detection point after the clamp straightener and the double-layer shear opening, generates the strip steel deceleration stop control target combined with the tail-shearing set length, collects the grating tail detection signal in real time, outputs the positioning start instruction when the light signal is valid and all interlocking conditions are met, executes the tail overshoot protection during the whole positioning process, resets the positioning instruction when the tail reaches the target stop position, and finally triggers the double-layer shear to complete the fixed-length shearing. The application takes the physical grating detection as the positioning reference, solves the problem of large error of the traditional roll diameter calculation mode, and can effectively improve the tail-shearing precision and the yield.

Description

Technical Field

[0001] This invention relates to the field of strip steel inlet treatment technology in metallurgical galvanizing production lines, and in particular to an inlet tail shearing control method, system, equipment and storage medium. Background Technology

[0002] In the existing strip uncoiling and tail shearing process, under stable tension conditions, the linear velocity calculated by the No. 1 tension roller encoder is used as the reference. The radius of the steel coil is calculated by measuring the angular velocity of the uncoiling machine. Combined with the known inner diameter of the steel coil and the thickness of the strip, the remaining strip length is calculated and corrected in real time to control the tail shearing positioning.

[0003] However, this method has obvious defects in practical applications: First, the remaining length calculation is inherently flawed due to the thickness deviation of the strip tail during the tail-swing stage, and the shearing length deviation is particularly significant for thin strip steel. Second, when the amount of remaining strip steel is small, the inner ring of the steel coil is prone to loosening, slipping, and falling off, which leads to inaccurate coil diameter calculation, further aggravating the error in the remaining length calculation, ultimately resulting in insufficient accuracy of the strip tail shearing length and reduced yield, failing to meet the production requirements of high-precision fixed-length shearing of short tail materials.

[0004] Therefore, it is necessary to propose an inlet tail-flip shearing control method, system, device and storage medium to solve or at least alleviate the above-mentioned defects. Summary of the Invention

[0005] The main objective of this invention is to provide an inlet tail shearing control method, system, device, and storage medium to solve the problem that insufficient precision caused by strip shearing length deviation in the prior art cannot meet production requirements.

[0006] To achieve the above objectives, the present invention provides an inlet tail-flip shearing control method, comprising the following steps: S1, obtain the upper channel tail shearing setting length, and when the tail shearing setting length meets the preset length threshold condition, activate the upper channel tailless roll control mode. S2, based on the fixed equipment spacing between the rear grating detection point of the clamping straightener and the double-layer scissor blade, combined with the set length of the strip tail shearing, the total positioning running stroke is calculated, and the strip deceleration and stopping control target is generated; S3: Real-time acquisition of the strip tail detection signal of the grating behind the clamping and straightening machine. When the light signal of the strip tail passing through the grating is detected and all preset interlocking conditions are met, a positioning start command is output to trigger the strip position positioning operation. S4 performs overshoot protection before and during positioning start-up. When the tail is detected to have reached the target stop position, the positioning start command is reset and the positioning control process ends. S5, after the positioning process is completed, trigger the double-layer shear to perform a tail-fixed length shearing action.

[0007] Preferably, step S1 specifically includes: S11. Obtain the upper channel tail shearing length setting value from the process parameter storage unit; S12. Compare the set value of the tail shearing length with the preset length threshold. When the set value is less than or equal to the preset length threshold, activate the upper channel tailless roll control mode to switch to the high-precision positioning shearing control mode.

[0008] Preferably, step S2 specifically includes: S21. Retrieve the preset fixed physical distance value from the rear grating detection point of the clamping machine to the double-layer scissor edge from the equipment parameter library; S22. Subtract the set length of the strip tail shearing from the fixed physical distance value to calculate the total stroke of the strip positioning operation; S23. Generate a strip speed control curve based on the total positioning and running stroke, and control the strip to smoothly reduce its speed to zero at the end of the total positioning and running stroke, so that the tail of the strip stops to match the fixed length requirement of the shearing blade.

[0009] Preferably, step S3 specifically includes: S31. Real-time acquisition of the level signal of the tail detection grating on the exit side of the clamping and straightening machine. When the signal changes from the light-blocking state to the light-passing state, start the delay anti-shake timer. S32. When the duration of the light transmission state reaches the preset anti-shake duration, confirm that the detection signal of the tail passing through the grating is valid; S33. Simultaneously verify multiple interlocking conditions; among which, multiple interlocking conditions include the completion status of strip steel welding process, the start status of target positioning shaft, the current remaining total length of strip steel, and the activation status of tailless coil control mode; S34. When the detection signal is valid and all interlocking conditions are met, the SR set priority trigger outputs a positioning start command to start the strip steel position positioning operation.

[0010] Preferably, in step S4, the overshoot protection before positioning and starting specifically includes: S41. When the positioning logic is not ready, collect the strip running speed data in real time, and combine the strip tail position prediction model to determine the time when the strip tail reaches the grating detection position. S42. If the strip running speed exceeds the preset safety threshold, and the positioning logic is not ready when the strip tail is about to reach the grating detection position, a restriction interlock command is triggered to prevent the strip tail from swinging past the grating ahead of time and causing an uncut fault; wherein, the restriction interlock command includes reducing the strip running speed in advance or alarm intervention.

[0011] Preferably, in step S4, the control logic for positioning and resetting specifically includes: S43. During the positioning process, the real-time position of the tail and the progress of the positioning journey are detected in real time. S44. When it is detected that the tail has moved to the upper channel waiting position, or the positioning stroke has been completed and reached the target stop position, immediately output a reset signal to the SR trigger to clear the positioning start command and terminate the positioning control output.

[0012] Preferably, step S5 specifically includes: S51. After receiving the positioning end signal, send a shearing trigger command to the double-layer shear control system; S52. After cutting is completed, update the statistical data of the length cut with the tail, exit the tailless roll fine cutting mode, and restore the normal operation control logic.

[0013] This application also provides an inlet tail-swing control system, applied to the inlet tail-swing control method described above, the system comprising: The mode activation and stroke calculation module is used to activate the tailless roll control mode when the preset tail shearing length condition is met, and to calculate the total stroke of the positioning operation based on the fixed physical distance and the preset tail shearing length. The positioning start interlocking module is used to verify multiple interlocking conditions after anti-shake confirmation when the belt tail passes through the physical grating after the clamping and straightening machine and the detection signal undergoes a state flip. After all conditions are met, the positioning start command is triggered. The positioning execution and protection module is used to pre-judge and interlock the strip running speed and positioning ready state during the positioning execution process, and control the strip to run within the total stroke. The positioning end module is used to reset the positioning start signal and end the positioning process when the tail runs to the upper channel waiting position or the positioning stroke is completed and the target stop position is reached. The cut module is used to trigger the cut action.

[0014] This application also provides an inlet drift shearing control device, the inlet drift shearing control device comprising: a memory, a processor, and an inlet drift shearing control program stored in the memory, the processor being used to run the inlet drift shearing control program, the inlet drift shearing control program being configured to implement the inlet drift shearing control method as described above.

[0015] This application also provides a computer-readable storage medium storing an entry tail-flicking shearing control program, which, when executed by a processor, implements the entry tail-flicking shearing control method as described above.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention provides an inlet tail shearing control method, system, device, and storage medium. It uses the physical detection signal of the grating behind the clamping and straightening machine as the positioning trigger reference, replacing the traditional length estimation method that relies on roll diameter calculation. This eliminates the error in calculating the remaining length caused by tail thickness difference and slippage of the inner ring of the steel ring. By setting a length threshold to activate the tailless roll control mode, it introduces high-precision positioning control for short-tail material scenarios, improving shearing accuracy while ensuring production efficiency. The positioning stroke is calculated based on the fixed equipment distance from the grating to the shear blade, and precise stopping is achieved in conjunction with deceleration and stop control. Simultaneously, multi-condition interlocking trigger logic and a tail overshoot protection mechanism effectively avoid tail overshoot and missed cutting faults, comprehensively improving the fixed-length shearing accuracy of short-tail strip steel and significantly increasing strip steel yield and production stability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a flowchart illustrating the control method in one embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the entry tail-flipping and shearing control device of the hardware operating environment involved in the embodiment of the present invention.

[0019] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0023] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0024] Please see the appendix Figure 1 An inlet tail-flicking shearing control method provided in one embodiment of the present invention includes the following steps: S1. Obtain the set length for tail shearing in the upper channel. When the set length for tail shearing meets the preset length threshold condition, activate the upper channel tailless roll control mode. By reading the set length for tail shearing in the upper channel from the production line process data block, compare it with the preset length threshold value to filter out the target working condition for high-precision shearing of short tail materials. When the set length for tail shearing meets the preset length threshold condition, the system automatically sets the mode flag, activates the upper channel tailless roll control mode, and calls the corresponding high-precision positioning control function block to replace the original tail-waving length control logic based on roll diameter calculation. This step addresses the problem of high roll diameter calculation error and substandard shearing accuracy in the short tail material shearing scenario. It achieves automatic switching of control mode through threshold judgment. When the long tail is being waved, the original control logic is maintained to ensure production rhythm. When the short tail is being sheared, high-precision positioning control is switched in, which improves the shearing accuracy of short tail materials without affecting the overall production efficiency.

[0025] S2, based on the fixed equipment spacing between the grating detection point behind the clamping and straightening machine and the double-layer scissor blades, combined with the set length of the strip tail shearing, calculates the total positioning travel distance and generates the strip deceleration and stopping control target. Using the fixed equipment spacing between the grating detection point behind the clamping and straightening machine and the double-layer scissor blades as the physical reference for positioning calculation, and combined with the set length of the upper channel strip tail shearing under the current working conditions, performs a difference calculation to obtain the total positioning travel distance required for the strip to travel from the grating detection trigger position to the target shearing stopping point. Simultaneously, based on this total travel distance and a preset speed control function, a segmented control target for strip deceleration and stopping is generated, clarifying the node parameters for high-speed operation, smooth deceleration, and zero-speed stopping. By using the fixed physical position spacing on site as the calculation reference, the dependence on the roll diameter calculation result is completely eliminated, and the length estimation error caused by the strip tail thickness difference and the slippage of the inner ring of the steel ring is eliminated from the calculation source. The positioning accuracy is determined by the equipment installation and calibration accuracy and is not affected by the fluctuation of strip specifications and operating conditions.

[0026] S3 acquires the strip tail detection signal from the grating behind the straightening machine in real time. When the light-transmitting signal of the strip tail passing through the grating is detected and all preset interlocking conditions are met, a positioning start command is output to trigger the strip positioning operation. The strip tail detection signal output by the grating sensor behind the straightening machine is acquired in real time through the PLC digital input module, and the level status of the strip blocking the grating is continuously monitored. When the tail of the strip passes through the grating detection surface, the grating signal changes from the light-blocking state to the light-transmitting state. The system recognizes this state change as the reference time for positioning triggering. At the same time, the system reads the signals of the preceding process, equipment status signals, material parameter signals, and mode status signals in parallel. After verifying that all preset interlocking conditions are met, a positioning start command is output to the transmission positioning control unit to formally trigger the closed-loop positioning operation of the strip. The on / off signal of the physical grating is used as the hard trigger point for positioning start. The trigger time strictly corresponds to the physical position of the strip tail, and the positioning start point accuracy is high. Multi-condition interlocking verification can eliminate false starts when the working conditions are inconsistent, ensuring the compliance of the positioning process with the preceding and following processes.

[0027] S4 implements overshoot protection before and during positioning. When the strip tail is detected to have reached the target stop position, the positioning start command is reset, ending the positioning control process. Before positioning starts, the system performs overshoot protection by acquiring strip speed and predicting strip tail position to prevent the strip tail from prematurely passing the grating when the strip speed is too high or the positioning logic is not ready, resulting in a missed cut fault where the strip tail passes the shearing position before positioning. During positioning operation, the system acquires position feedback data from the drive encoder in real time, calculates the cumulative displacement of the strip from the grating trigger position, tracks the completion progress of the positioning stroke, and outputs a reset signal to the positioning start trigger when the strip tail is detected to have reached the preset target stop position, clearing the positioning start command and terminating the positioning control process. Overshoot protection eliminates the risk of missed cuts under high-speed conditions, and real-time reset based on position feedback achieves precise control of the positioning endpoint. The seamless integration of these two aspects constitutes a complete positioning process control, ensuring the safety of the positioning process and the accuracy of the endpoint position.

[0028] S5, after the positioning process is completed, the double-layer shear is triggered to perform a fixed-length shearing action on the tail of the belt. After the positioning process ends and the positioning start command is reset, the system determines that the tail of the belt has stably stopped at the target shearing position, and then sends a shearing trigger command to the control unit of the double-layer shear, driving the shear blade to move according to the preset timing sequence to complete the fixed-length shearing of the tail of the belt. After the shearing is completed, the system updates the production statistics data of the tail shearing and automatically exits the tailless coil precision cutting mode, restores the normal operation control logic of the production line, and waits for the next tail-spinning process to be triggered. This achieves automatic connection between the completion of positioning and the shearing action, completing the entire process without manual intervention, improving the automation level of the process. At the same time, after the shearing is completed, the normal mode is automatically restored to ensure the normal operation of subsequent processes on the production line, forming a complete process closed loop.

[0029] In a preferred embodiment of the present invention, step S1 specifically includes: S11. Obtain the upper channel strip tail shearing length setting value from the process parameter storage unit; read the upper channel strip tail shearing length setting value from the process parameter storage unit via the PLC bus. This setting value is entered by the operator on the production line's human-machine interface according to the production plan and strip specifications and stored in the corresponding process data block. It represents the target strip tail length to be cut off in the current batch of strip steel, providing basic input parameters for subsequent mode determination and positioning stroke calculation. This step directly retrieves the native setting parameters from the production line's process database. The parameter source is completely the same as the production process setting, eliminating the need for manual secondary entry or conversion, avoiding human error in the parameter transmission process, and ensuring the accuracy and consistency of the input parameters.

[0030] S12. The set value of the tail shearing length is compared with a preset length threshold. When the set value is less than or equal to the preset length threshold, the upper channel tailless roll control mode is activated to switch to the high-precision positioning shearing control mode. The read tail shearing length set value is compared in real time with the preset length threshold pre-configured in the control program parameter register. The preset length threshold is 7 meters, defining the applicable scenario for high-precision shearing of short tail materials. When the tail shearing length set value is less than or equal to 7 meters, the system sets the activation flag of the upper channel tailless roll control mode and calls the corresponding positioning control function block to complete the switch from the conventional tail-swing control mode to the high-precision positioning shearing control mode. This simple numerical comparison logic achieves automatic mode switching. The controller has low computational load and fast response speed. It can automatically switch to the appropriate control logic under short tail shearing conditions without manual intervention, ensuring the timeliness and accuracy of the condition switching.

[0031] In a preferred embodiment of the present invention, step S2 specifically includes: S21. Retrieve the preset fixed physical distance value from the rear grating detection point of the clamping and straightening machine to the double-layer scissor edge from the equipment parameter library; retrieve the fixed physical distance value from the rear grating detection point of the clamping and straightening machine to the double-layer scissor edge from the equipment parameter library built into the PLC. This distance value is 10 meters, which is a constant mechanical parameter written into the parameter library after on-site measurement and calibration by laser ranging during the equipment installation and commissioning phase of the production line. It will not be modified during production operation due to changes in strip specifications, coil diameter, running speed, or other working conditions. Using the pre-calibrated fixed mechanical parameter as the calculation benchmark, the parameter value is stable and drift-free over a long period of time, and there is no cumulative error caused by dynamic calculation, providing a reliable and constant physical position reference for subsequent positioning stroke calculation.

[0032] S22. The total travel distance for strip positioning is calculated by subtracting the set length for tail shearing from the fixed physical distance value. Through arithmetic difference calculation, the 10-meter fixed physical distance from the grating detection point of the clamping straightener to the double-layer shearing edge is subtracted from the set length for tail shearing of the current batch. The calculated result is the total displacement the strip needs to travel from the grating detection trigger position to the target stop position, which is the total positioning travel distance. For example, when the set length for tail shearing is 3 meters, the total positioning travel distance is 7 meters. After the strip travels 7 meters, the tail reaches the double-layer shearing edge position, corresponding to a 3-meter tail shearing length. This calculation logic is a simple arithmetic subtraction operation. The controller can complete the calculation output within one scan cycle, with strong real-time response. The calculation result directly corresponds to the actual physical displacement of the strip, and the positioning travel distance matches the shearing length one-to-one, without any deviation caused by intermediate conversion.

[0033] S23. Based on the total positioning stroke, a strip speed control curve is generated. The strip is controlled to smoothly decelerate to zero speed at the end of the total positioning stroke, so that the tail stop matches the fixed length requirement of the shearing blade. According to the calculated total positioning stroke value, a preset multi-segment speed control curve model is matched to generate a strip speed control curve including a high-speed running segment, a constant speed reduction segment, a creeping segment, and a zero-speed stopping segment. The control command is output to the transmission system. The transmission system controls the strip to run according to the speed curve. It first enters the positioning stroke at the current linear speed, and after reaching the preset deceleration point, it smoothly decelerates at a set slope, reaching zero speed at the end of the total positioning stroke, so that the final stopping position of the strip tail accurately corresponds to the fixed length shearing position of the double-layer shearing blade. This step avoids tension fluctuations, strip slippage, and mechanical impact on the equipment caused by sudden high-speed stops of the strip, while ensuring that the strip stops accurately within the set total stroke, achieving a precise match between the tail stop and the shearing length requirement.

[0034] In a preferred embodiment of the present invention, step S3 specifically includes: S31. Real-time acquisition of the level signal of the belt tail detection grating on the exit side of the clamping and straightening machine. When the signal changes from a light-blocking state to a light-passing state, a delay anti-jitter timer is started. The belt tail detection grating on the exit side of the clamping and straightening machine is a through-beam photoelectric sensor, fixedly installed on the exit side frame of the clamping and straightening machine. The level signal output by the sensor is connected to the digital input module of the PLC. The system reads the level status of this input point in each scanning cycle. When the signal changes from a low level representing light blocking to a high level representing light passing, it is determined that the tail of the belt has passed the grating detection surface. At the same time, the TON delay timer in the PLC is started to begin timing anti-jitter. By accurately capturing the physical moment of the belt tail passing through the level edge detection, the time resolution can reach the PLC scanning cycle level, providing a high-precision start time reference for positioning control. The synchronous start of the timer also prepares for subsequent signal anti-jitter verification.

[0035] S32. When the duration of the light-through state reaches the preset anti-shake duration, the detection signal of the belt tail passing through the grating is confirmed to be valid. The preset anti-shake duration is configured to 0.1 seconds and written to the preset value PT terminal of the TON timer. During the timer's counting process, the system continuously monitors the light-through state of the grating. If the signal changes back to the blocking state during the counting period, the timer is automatically reset to zero, and the signal is determined to be an interference signal. When the light-through state is maintained for 0.1 seconds and the timer count reaches the preset value, the timer output terminal Q is turned on, confirming that the detection signal of the belt tail passing through the grating is a real and valid signal. Through the 0.1-second delay anti-shake logic, the system filters out the momentary light-through false signals caused by slight vibration of the strip steel, ambient stray light interference, and sensor electrical interference, avoiding false triggering of the positioning process and effectively improving the reliability of the belt tail position detection and the accuracy of positioning triggering.

[0036] S33. Simultaneously verify multiple interlocking conditions. These interlocking conditions include the completion status of the strip welding process, the start status of the target positioning shaft, the current remaining total length of the strip, and the activation status of the no-tail-coil control mode. While confirming the validity of the grating detection signal, simultaneously verify four interlocking conditions in parallel: First, the strip welding process completion signal is high, confirming that the preceding welding process has been completed and the strip is in a runnable positioning state; second, the target positioning shaft start signal is low, confirming that the positioning shaft is not in a running state, avoiding equipment conflicts caused by repeated starts; third, the current remaining total length of the strip is less than 60 meters, confirming that the production line is in the tailing process stage; fourth, the upper channel no-tail-coil control mode is active, confirming that the control mode has been switched. When all four conditions are met, the interlocking verification is passed. In this way, the pre-start conditions are comprehensively verified from four dimensions: process, equipment status, material status, and control mode, ensuring that the working conditions are fully compliant during positioning startup, avoiding problems such as process errors, equipment conflicts, and erroneous startup under non-target working conditions, and ensuring the safety and orderliness of production operation.

[0037] S34. When the detection signal is valid and all interlocking conditions are met, the SR set-priority trigger outputs a positioning start command to initiate the strip positioning operation. The standard SR set-priority trigger within the PLC is used as the command output unit. The set terminal S receives the result of the AND operation between the valid grating signal and all interlocking conditions, while the reset terminal R receives the subsequent positioning reset signal. When the grating detection signal is valid and all interlocking conditions are met, the set terminal input is valid, the trigger output Q is set to a high level and latched, continuously outputting the positioning start command to the transmission control system to initiate the strip positioning operation until the reset terminal signal is valid, at which point the output state is cleared. Using a set-priority SR trigger to output the start command ensures stable latching and output of the command after the triggering conditions are met, unaffected by instantaneous signal fluctuations, ensuring the command remains valid throughout the positioning process. Simultaneously, the reset logic can easily terminate the positioning process, adapting to the continuous output requirements of industrial control.

[0038] In a preferred embodiment of the present invention, step S4, the overshoot protection before positioning and starting specifically includes: S41. When the positioning logic is not ready, the system collects real-time strip speed data and uses the strip tail position prediction model to determine the time it takes for the strip tail to reach the grating detection position. When the positioning logic is not ready (i.e., the no-tail-coil mode is not activated and all interlocking conditions are not met), the system collects real-time strip speed data from the tension roll encoder and calculates the estimated time for the strip tail to reach the grating detection position using the current remaining strip length and the strip tail position estimation function. Simultaneously, the system checks the ready status of the positioning logic. If the positioning logic is still not ready before the estimated strip tail reaches the grating, it determines that there is a risk of strip tail overshoot. This combined speed and position prediction allows for early identification of potential strip tail overshoot risks, providing sufficient response time for subsequent protective actions and avoiding the reactive approach of dealing with problems only after they occur.

[0039] S42. If the strip running speed exceeds the preset safety threshold, and the positioning logic is not ready when the strip tail is about to reach the grating detection position, a limiting interlock command is triggered to prevent the strip tail from overshooting the grating and causing an uncut fault. The limiting interlock command includes reducing the strip running speed in advance or triggering an alarm. When the strip running speed exceeds the preset safety speed threshold, and it is predicted that the strip tail is about to reach the grating detection position but the positioning logic is not ready, the system triggers the limiting interlock command, outputting a speed limiting command to the transmission system to reduce the strip running speed in advance, extending the time for the strip tail to reach the grating, and allowing sufficient time for the positioning logic to complete. Simultaneously, an on-site audible and visual alarm can be triggered to alert the operator to the current working condition, preventing the strip tail from overshooting the grating and causing it to pass the shearing position without positioning control, ultimately resulting in an uncut fault. Through active speed reduction interlock protection, the strip running rhythm is actively controlled when the positioning logic is not ready, fundamentally preventing the strip tail from overshooting and missing the cut, effectively improving the operational stability and product qualification rate of the short tail shearing process.

[0040] Furthermore, in step S4, the control logic for positioning and resetting specifically includes: S43. During the positioning operation, the real-time position of the belt tail and the progress of the positioning stroke are monitored. During the positioning operation, the system uses encoder position feedback data from the transmission system to calculate the cumulative displacement of the strip from the grating trigger position, thus obtaining the real-time position of the belt tail. The difference between the real-time position and the total positioning stroke is calculated to obtain the current positioning stroke completion progress. Simultaneously, the system reads the position detection signal from the upper channel waiting position and monitors in parallel whether the belt tail has reached the waiting position node. The belt tail position is tracked in real-time by accumulating encoder displacement. The position feedback accuracy is determined by the encoder resolution, resulting in high real-time performance and accuracy of positioning progress monitoring, providing accurate positional basis for the endpoint reset action.

[0041] S44. When the strip tail is detected to have reached the upper channel waiting position, or when the positioning stroke has been completed and the target stop position has been reached, a reset signal is immediately output to the SR trigger to clear the positioning start command and terminate the positioning control output. When the system detects that the real-time running displacement of the strip tail has reached the total positioning stroke, i.e., the strip tail has reached the target shearing stop position, or when the strip tail has reached the detection position of the upper channel waiting position, a high-level reset signal is immediately output to the reset terminal R of the SR trigger to clear the latched state of the trigger. The positioning start command becomes low, the positioning control output is terminated, and the positioning operation process officially ends. By adopting the control logic of resetting upon position arrival, the positioning control is ensured to stop immediately after the positioning stroke is completed, avoiding strip overtravel that could lead to shearing length deviation. At the same time, the waiting position is set as an auxiliary reset trigger point to cover the reset requirements under different working conditions and improve the overall reliability of the reset logic.

[0042] Furthermore, step S5 specifically includes: S51. Upon receiving the positioning end signal, a shearing trigger command is sent to the double-layer shear control system. After the system detects that the positioning start command has been reset, the strip speed has dropped to zero, and the position remains stable, a trigger signal is written to the shearing trigger address of the double-layer shear control system, formally sending the shearing trigger command. Upon receiving the command, the double-layer shear control system drives the shear blade to complete the entire set of actions—falling, shearing, and lifting—accurately according to the preset shearing sequence, completing the shearing process at the strip tail. This method of triggering shearing only after the strip position is stable avoids problems such as uneven cuts and accelerated shear blade wear caused by shearing during strip movement. Simultaneously, standardized command interaction enables coordinated action between the two systems, ensuring accurate and controllable shearing timing.

[0043] S52. After shearing is completed, update the statistical data of the cut length of the strip tail, exit the tailless coil precision cutting mode, and restore the normal operation control logic. After the shearing action is completed, the double-layer shearing control system sends a response signal indicating that shearing is complete to the main control system. The system writes the length data of this shearing into the statistical register of the cut length of the strip tail, and updates the production statistics data for traceability. At the same time, the system resets the activation flag of the tailless coil control mode, exits the high-precision positioning shearing mode, and the control program switches back to the normal production line operation control logic, waiting for the trigger condition of the next tail-spinning process. This automatically completes the production data statistics and control mode reset, ensuring the traceability of production data, and automatically restores the normal control logic without affecting the normal production operation of subsequent strip steel, realizing the complete closed-loop control of the tail-spinning shearing process.

[0044] This application also provides an inlet tail-swing shearing control system, applied to the inlet tail-swing shearing control method described above. The system includes: a mode activation and stroke calculation module, used to activate the tailless coil control mode when a preset tail-swing length condition is met, and calculate the total stroke of the positioning operation based on a fixed physical distance and the preset tail-swing length; a positioning start interlocking module, used to verify multiple interlocking conditions after anti-shake confirmation when the strip tail passes through the physical grating after the clamping and straightening machine and the detection signal undergoes a state flip, and trigger a positioning start command after all conditions are met; a positioning execution and protection module, used to perform pre-judgment interlocking of the strip running speed and positioning ready state during the positioning execution process, and control the strip to run within the total stroke; a positioning end module, used to reset the positioning start signal and end the positioning process when the strip tail runs to the upper channel waiting position or the positioning stroke is completed and reaches the target stop position; and a shearing module, used to trigger the shearing action.

[0045] The inlet drift shearing control device provided in this application, employing the inlet drift shearing control method in the above embodiments, can solve the technical problem of inlet drift shearing control. Compared with the prior art, the beneficial effects of the inlet drift shearing control device provided in this application are the same as those of the inlet drift shearing control method provided in the above embodiments, and other technical features in the inlet drift shearing control device are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0046] This application also provides an inlet drift shearing control device, the inlet drift shearing control device comprising: a memory, a processor, and an inlet drift shearing control program stored in the memory, the processor being used to run the inlet drift shearing control program, the inlet drift shearing control program being configured to implement the inlet drift shearing control method as described above.

[0047] like Figure 2 As shown, the entry tail-flipping control device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen, an input unit such as a keyboard, and may also include standard wired or wireless interfaces. The network interface 1004 may optionally include standard wired or wireless interfaces (such as Wireless-Fidelity (Wi-Fi) interfaces). The memory 1005 may be high-speed random access memory (RAM) or stable non-volatile memory (NVM), such as a disk drive. The memory 1005 may also optionally be a storage device independent of the aforementioned processor 1001.

[0048] This application also provides a computer-readable storage medium storing an entry tail-flicking shearing control program, which, when executed by a processor, implements the entry tail-flicking shearing control method as described above.

[0049] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the 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, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0050] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. An inlet tail-flicking shearing control method, characterized in that, Includes the following steps: S1, obtain the upper channel tail shearing setting length, and when the tail shearing setting length meets the preset length threshold condition, activate the upper channel tailless roll control mode. S2, based on the fixed equipment spacing between the rear grating detection point of the clamping straightener and the double-layer scissor blade, combined with the set length of the strip tail shearing, the total positioning running stroke is calculated, and the strip deceleration and stopping control target is generated; S3: Real-time acquisition of the strip tail detection signal of the grating behind the clamping and straightening machine. When the light signal of the strip tail passing through the grating is detected and all preset interlocking conditions are met, a positioning start command is output to trigger the strip position positioning operation. S4 performs overshoot protection before and during positioning start-up. When the tail is detected to have reached the target stop position, the positioning start command is reset and the positioning control process ends. S5, after the positioning process is completed, trigger the double-layer shear to perform a tail-fixed length shearing action.

2. The inlet tail-flicking shearing control method according to claim 1, characterized in that, Step S1 specifically includes: S11. Obtain the upper channel tail shearing length setting value from the process parameter storage unit; S12. Compare the set value of the tail shearing length with the preset length threshold. When the set value is less than or equal to the preset length threshold, activate the upper channel tailless roll control mode to switch to the high-precision positioning shearing control mode.

3. The inlet tail-flicking shearing control method according to claim 1, characterized in that, Step S2 specifically includes: S21. Retrieve the preset fixed physical distance value from the rear grating detection point of the clamping machine to the double-layer scissor edge from the equipment parameter library; S22. Subtract the set length of the strip tail shearing from the fixed physical distance value to calculate the total stroke of the strip positioning operation; S23. Generate a strip speed control curve based on the total positioning and running stroke, and control the strip to smoothly reduce its speed to zero at the end of the total positioning and running stroke, so that the tail of the strip stops to match the fixed length requirement of the shearing blade.

4. The inlet tail-flicking shearing control method according to claim 1, characterized in that, Step S3 specifically includes: S31. Real-time acquisition of the level signal of the tail detection grating on the exit side of the clamping and straightening machine. When the signal changes from the light-blocking state to the light-passing state, start the delay anti-shake timer. S32. When the duration of the light transmission state reaches the preset anti-shake duration, confirm that the detection signal of the tail passing through the grating is valid; S33. Simultaneously verify multiple interlocking conditions; among which, multiple interlocking conditions include the completion status of strip steel welding process, the start status of target positioning shaft, the current remaining total length of strip steel, and the activation status of tailless coil control mode; S34. When the detection signal is valid and all interlocking conditions are met, the SR set priority trigger outputs a positioning start command to start the strip steel position positioning operation.

5. The inlet tail-flicking shearing control method according to claim 1, characterized in that, In step S4, the tail overshoot protection before positioning and starting specifically includes: S41. When the positioning logic is not ready, collect the strip running speed data in real time, and combine the strip tail position prediction model to determine the time when the strip tail reaches the grating detection position. S42. If the strip running speed exceeds the preset safety threshold, and the positioning logic is not ready when the strip tail is about to reach the grating detection position, a restriction interlock command is triggered to prevent the strip tail from swinging past the grating ahead of time and causing an uncut fault; wherein, the restriction interlock command includes reducing the strip running speed in advance or alarm intervention.

6. The inlet tail-flicking shearing control method according to claim 5, characterized in that, In step S4, the control logic for positioning and resetting specifically includes: S43. During the positioning process, the real-time position of the tail and the progress of the positioning journey are detected in real time. S44. When it is detected that the tail has moved to the upper channel waiting position, or the positioning stroke has been completed and reached the target stop position, immediately output a reset signal to the SR trigger to clear the positioning start command and terminate the positioning control output.

7. The inlet tail-flicking shearing control method according to claim 1, characterized in that, Step S5 specifically includes: S51. After receiving the positioning end signal, send a shearing trigger command to the double-layer shear control system; S52. After cutting is completed, update the statistical data of the length cut with the tail, exit the tailless roll fine cutting mode, and restore the normal operation control logic.

8. An inlet tail-flick shearing control system, applied to the inlet tail-flick shearing control method as described in any one of claims 1 to 7, characterized in that, The system includes: The mode activation and stroke calculation module is used to activate the tailless roll control mode when the preset tail shearing length condition is met, and to calculate the total stroke of the positioning operation based on the fixed physical distance and the preset tail shearing length. The positioning start interlocking module is used to verify multiple interlocking conditions after anti-shake confirmation when the belt tail passes through the physical grating after the clamping and straightening machine and the detection signal undergoes a state flip. After all conditions are met, the positioning start command is triggered. The positioning execution and protection module is used to pre-judge and interlock the strip running speed and positioning ready state during the positioning execution process, and control the strip to run within the total stroke. The positioning end module is used to reset the positioning start signal and end the positioning process when the tail runs to the upper channel waiting position or the positioning stroke is completed and the target stop position is reached. The cut module is used to trigger the cut action.

9. An inlet tail-swing shearing control device, characterized in that, The inlet drift shearing control device includes: a memory, a processor, and an inlet drift shearing control program stored in the memory. The processor is used to run the inlet drift shearing control program, which is configured to implement the inlet drift shearing control method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores an entry tail-flicking shearing control program, which, when executed by a processor, implements the entry tail-flicking shearing control method as described in any one of claims 1 to 7.

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