A gauge cutting intelligent cutting system and method

Abstract

A kind of intelligent shearing system and method of gauge shear, from 40-50 meters before gauge shear, utilize old field sensor signal, complete all slab position tracking, and according to the steel plate tracking information of shearing area, auxiliary control roller way operating state, to effectively improve shearing rhythm;With the system of laser speed measuring instrument, receive incoming PDI data and shearing information;After automatic positioning is completed, send positioning completion instruction to operator, automatically or semi-automatically complete shearing action.The beneficial effects of the present application are: the present application is reasonable, simple to control, good stability, by applying original PLC hardware basis, by increasing detection instrument, complete the position tracking of all steel plates on the roller way before and after gauge shear, and according to the establishment of shearing procedure, speed measuring instrument data, improve the automation control level of gauge shear, realize the intelligent shearing function of gauge shear, with high reliability, strong practicality and other characteristics.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fixed-length shearing, in particular to a fixed-length shearing intelligent shearing system and method. BACKGROUND

[0002] The fixed-length shearing is an important steel plate fixed-length shearing equipment in the shearing production line of the medium plate factory. The previous operation shearing process is the full manual operation, that is, the manual operation receives the steel plate at the fixed-length shearing front roller way, and the manual control roller way transports the steel plate to the fixed-length shearing. There is a scale at the fixed-length shearing rear roller way side, the length fixed-length is performed by the video on the operation table to view the steel plate position after the shearing, including the arc of the steel plate shearing head and tail, which are manually sheared. Since all the fixed-length shearing operations are manually operated, the efficiency is low, which affects the production rhythm; and the manual naked eye views the shearing scale to perform the steel plate fixed-length, which leads to the large remaining amount after the steel plate fixed-length, and the low material yield. SUMMARY

[0003] The present application aims at the deficiencies and defects in the prior art, and provides a fixed-length shearing intelligent shearing system and method. The fixed-length shearing intelligent shearing system and method not only improve the automation and intelligent level of the fixed-length shearing area equipment, but also complete the position tracking of all the steel plates on the front and rear roller ways of the fixed-length shearing by increasing the cold detector, the light curtain detection and other instruments and meters on the basis of the original fixed-length shearing PLC hardware, and complete the automatic shearing of the mother plate according to the data of the speed and length measuring instrument which has been installed, and control the roller way to automatically complete the length closed loop control, so as to realize the intelligent shearing function of the shearing, reduce the workload of the manual operation, and improve the shearing efficiency of the fixed-length shearing.

[0004] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a fixed-length shearing intelligent shearing system and method, which comprises the following instrument configuration: a laser speed and length measuring instrument, which is used to measure the steel plate length in real time, as the main data basis of the automatic shearing closed loop control; a cold metal detector, which is installed at 40-50 meters before the shearing in order to better ensure the length measuring precision and stability, is used to track the initial position of the steel plate entering the fixed-length shearing area, and two cold metal detectors are installed at 8 meters and 10 meters of the rear roller way in order to automatically check the measuring data, improve the stability and anti-interference of the detection system; a light curtain detection, which is installed within 1 meter before the shearing, is used to detect the regular or irregular head, so as to complete the automatic shearing of the head; a tail imaging system, which is installed at 3-5 meters before the fixed-length shearing, determines the system detection opportunity and the measured object speed through the signal data of the speed measuring instrument and the front and rear photoelectric switches, and fits the plate profile of the steel plate tail through the steel plate edge measured by the detector, so as to provide the basis of the tail length which should be cut for the automatic system.

[0005] Further, it includes the following specific working steps: from 40-50 meters before the sizing shear, all the slab position tracking is completed by using the sensor signal of the old site, and the roller operation state is assisted to be controlled according to the steel plate tracking information of the shearing area, so that the shearing rhythm is effectively improved; the system of the laser speed and length measuring instrument is communicated to receive the incoming PDI data and the shearing information; the shearing list is automatically generated according to the mother plate shearing requirement; the sampling length and the sampling position are automatically calculated according to the mother plate PDI information and the sampling process; the sizing shear shearing step is determined according to the shearing list and the sampling position; the tail shearing procedure is determined according to the tail detection system; the automatic shearing of the strip body and the tail is completed; the slab sizing function is completed according to the position closed-loop control; after the automatic positioning is completed, the positioning completion indication is sent to the operator, and the shearing action is automatically or semi-automatically completed.

[0006] An intelligent shearing system of a sizing shear includes intelligent shearing control function and automatic shearing system function: the intelligent shearing control function includes head cutting of segmented steel plates and head cutting of unsegmented steel plates; the head cutting of segmented steel plates includes the following: when the first section is a single sub-plate, the sub-steel plate directly passes through the sizing shear without shearing, but the length value of the steel plate measured by the length measuring system is collected for steel plate positioning; when the first section is a multi-sizing mother plate, the system reads the planned "sizing / reference pass length"; when the second section is a single sub-plate, the system reads the planned "sizing / reference pass length"; when the second section is multiple sub-plates, the system reads the planned "sizing / reference pass length".

[0007] Further, the specific shearing mode when the first section is a multi-sizing mother plate is as follows: according to the length data of the length measuring instrument, when the length of the steel plate is "sizing / reference pass length"+10-15mm, automatic shearing is performed; the action is repeated until the last sub-plate of the first section, when the last sub-plate is a sizing plate, the length allowance is <30mm, and no shearing is performed, and when the length allowance is >30mm, supplementary cutting is performed to avoid length exceeding the standard, wherein when the last sub-plate is a pass plate, the sub-steel plate directly passes through the sizing shear without shearing.

[0008] Further, the specific shearing mode when the second section is a single sub-plate is as follows: sizing plate: according to the length data of the laser speed and length measuring instrument, when the length of the steel plate is the sizing length+10-15mm, automatic shearing is performed, wherein, but the two side arcs or artificial mark defects are preferentially ensured to be cut off completely; pass plate: when the steel plate is opened to a position at which the two side arcs or artificial mark defects can be cut off completely, the length data of the length measuring instrument is read, and automatic shearing is performed.

[0009] Further, the specific cutting method of the second section when the second section is multiple sub-plates is as follows: according to the length data of the length measuring instrument, when the length of the steel plate is "fixed size / reference gauge length" + 10-15mm, the automatic cutting is performed; the action is repeated until the last sub-plate of the second section, when the last sub-plate is a fixed size plate, according to the length data of the length measuring instrument, when the length of the steel plate is "fixed size length" + 10-15mm, the automatic cutting is performed, when the last sub-plate is a gauge plate, the steel plate is opened to the position where the tail two sides of the arc or the artificial mark defect can be cut off, the length data of the length measuring instrument is read, and the automatic cutting is performed.

[0010] Further, the automatic cutting system function has the following functions: slab tracking; cutting procedure establishment; steel plate position APC closed loop control.

[0011] Further, the slab tracking is specifically as follows: a position coordinate axis is established in the entire fixed size cutting area, the cutting blade position is "0", the front 50 meters to the rear 40 meters are the overall tracking area, a tracking trigger point (cold detection or photoelectric switch) is set at the connection position of the disc cutting rear transport roller and the fixed size cutting front roller, when the steel plate passes through the trigger point, the head and tail positions are tracked by the speed integration method, and the position is corrected when passing through the corresponding sensor on the line, the speed integration data is mainly based on the running speed of each roller, and the length feedback of the speed measuring length measuring instrument is used for the steel plate before and after the fixed size cutting, so that the position tracking accuracy of the slab to be fixed is improved; when the mother plate is cut off at the fixed size cutting, the cut-off steel plate can form a new number of slabs and start to be tracked; the tracking system can simultaneously track up to 10 steel plate positions, and different colors are used for display on the HMI screen, and the tracking data is used for prompting the operator and other functions in the system.

[0012] Further, the cutting procedure establishment includes the following specific: since the speed measuring length system has established communication with the MES system in the original system, after the steel plate information is detected by the cold detection before the fixed size cutting machine, the steel plate PDI information is automatically obtained, and the cutting procedure is confirmed, therefore, the newly added optimized cutting control system establishes the TCP / IP communication with the speed measuring length system, and also obtains the information, establishes the cutting procedure, and in the HMI screen, there is a size input window, the data is automatically operated with the original cutting procedure, and the final cutting procedure is formed, the procedure can be manually input, corrected, stored, called, etc., and is used for temporarily manually inputting the cutting procedure when there is no steel plate PDI information or the incoming material and the information are inconsistent.

[0013] Further, the steel plate position APC closed loop control is specifically: under the automatic mode, the speed value of the roller is controlled by the PLC, the steel plate length feedback signal detected by the speed and length detector is received, the position closed loop control is formed, and accurate positioning in the length direction of the steel plate is provided; the APC control is the control basis of the automatic shearing of the sizing shear, the positioning accuracy and the positioning speed are directly related to the product quality and the production speed; the reference of the APC positioning is the length target value of the shearing specification of each sub plate; the system calculates the length deviation ΔS (target value-actual value) according to the actual length feedback by the length detector, the relationship between the roller speed V and the roller gap deviation ΔS is: the polarity of the speed V is determined according to the positive and negative of ΔS, the size of K is segmented adjusted according to the size of ΔS, and the limit characteristic and the dead zone characteristic are used, when ΔS is greater than the deceleration point, V=Vmax, and when ΔS is less than the dead zone value, V=0. Due to the particularity of the roller conveying the steel plate, too fast lifting speed can cause the relative sliding between the steel plate and the roller, and affect the actual positioning accuracy. In order to ensure the accuracy and high speed of the roller positioning, different maximum speeds Vmax and slopes K need to be specified in different deviation ranges, so as to ensure that there is no relative sliding in the final positioning, and at the same time, the high speed area in a large range is ensured as much as possible to improve the shearing rhythm. At the same time, the transmission device needs to be optimized to ensure the follow-up response of the roller speed in the low speed area. Since the roller transmission is mostly open loop control, an incremental encoder needs to be added for closed loop control or the feedback data of the length detector is used as the optimization basis.

[0014] After the above technical scheme is adopted, the present application has the beneficial effects that: the intelligent shearing system and method of the present sizing shear not only improves the automation and intelligent level of the sizing shear area equipment, but also can maximize the use of the original sizing shear PLC hardware basis, complete the position tracking of all steel plates on the roller before and after the sizing shear through the increase of cold detection, light curtain detection and other instruments and meters, and complete the automatic shearing of the mother plate according to the data of the speed and length detector already installed, control the roller to automatically complete the length closed loop control, realize the intelligent shearing function of the shearing shear, reduce the workload of manual operation, and thus improve the shearing efficiency of the sizing shear. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative labor.

[0016] Figure 1 is the intention of the sizing shear instrument in the present application.

[0017] Figure 2 is the automatic shearing schematic diagram in the present application.

[0018] Figure 3 is the step sequence diagram of the intelligent shearing in the present application.

[0019] Figure 4 is the roller speed output control schematic diagram when the length is set in the present application. DETAILED DESCRIPTION

[0020] Referring to Figure 1 The technical solution adopted in the present embodiment is shown in the drawings: the basic automation system of the shearing line is composed of SIEMENS S7-400 series modules, the HMI screen is edited by WINCC, the roller is controlled by a frequency converter, and a laser speed and length measuring instrument is provided to measure the length of the steel plate. The three-level MES system has realized the material tracking of the area. The optimized shearing control system is configured with a basic automation control system. The PLC system of the system uses the original shearing line SIEMENS S7-400 series PLC as the main core component, and the HMI screen part uses the WINCC 7.0 version of SIEMENS. Since these PLC control systems and the WinCC of the HMI interface of the shearing line are products of SIEMENS, the PLC control system is relatively simple and easy to maintain in terms of Ethernet, Profibus-DP network and MPI network communication, and it includes the following instrument configuration:

[0021] Laser speed and length measuring instrument: used to measure the length of the steel plate in real time as the main data basis for automatic shearing closed-loop control.

[0022] Cold metal detector: in order to better ensure the length measurement accuracy and stability, a cold metal detector is installed at 40-50 meters before shearing to track the initial position of the steel plate entering the shearing line area, and two cold metal detectors are installed at 8 meters and 10 meters after the shearing roller to automatically check the measurement data and improve the stability and anti-interference of the detection system.

[0023] Light curtain detection: in order to complete the head shearing process, a light curtain detection is installed within 1 meter before shearing to detect regular or irregular heads, thereby completing the automatic shearing of the head.

[0024] Tail imaging system: a set of tail detection system is installed at 3-5 meters before the shearing line, which determines the system detection opportunity and the speed of the measured object through the signal data of the speedometer and the front and rear photoelectric switches, and fits the plate profile of the tail of the steel plate through the edge of the steel plate measured by the detector, thereby providing the basis for the length of the tail to be cut off for the automatic system.

[0025] It includes the following specific working steps:

[0026] S1, from 40-50 meters before the sizing shear, using the old site sensor signal, complete all the slab position tracking, and according to the steel plate tracking information of the shear area, auxiliary control the roller operation state, so as to effectively improve the shear rhythm;

[0027] S2, communicate with the system of laser speed and length measuring instrument, receive incoming PDI data and shear information;

[0028] S3, automatically generate a shear list according to the mother plate shear requirements;

[0029] S4, automatically calculate the sampling length and sampling position according to the mother plate PDI information and sampling process, which can be manually intervened;

[0030] S5, determine the sizing shear step sequence according to the shear list and sampling position;

[0031] S6, determine the tail shear procedure according to the tail detection system;

[0032] S7, complete the automatic shear of the strip body and tail;

[0033] S8, complete the slab sizing function according to the position closed-loop control;

[0034] S10, after automatic positioning is completed, send a positioning completion indication to the operator, and automatically or semi-automatically complete the shear action.

[0035] An intelligent shear system of sizing shear, which comprises intelligent shear control function and automatic shear system function:

[0036] The intelligent shear control function comprises head cutting of segmented steel plates and head cutting of unsegmented steel plates;

[0037] The head cutting of segmented steel plates comprises the following:

[0038] 1) When the first section is a single sub-plate, the sub-steel plate directly passes through the sizing shear without cutting, but the length value of the steel plate measured by the length measuring system is collected for steel plate positioning.

[0039] 2) When the first section is a multi-sizing mother plate, the system reads the planned "sizing / reference gauge length", wherein the specific shear mode is as follows:

[0040] ① According to the length data of the length measuring instrument, when the steel plate length is "sizing / reference gauge length"+10-15mm, automatic shear;

[0041] ② Repeat the action until the last sub-plate of the first section, when the last sub-plate is a sizing plate, the length allowance is <30mm, and when the length allowance is >30mm, perform a supplementary cut to avoid length exceeding the standard, wherein when the last sub-plate is a gauge plate, the sub-steel plate directly passes through the sizing shear without cutting.

[0042] 3) When the second section is a single sub-plate, the system reads the planned "cut-to-length / referenced gauge length", and the specific cutting method is as follows:

[0043] ① Cut-to-length plate: according to the length data of the laser speed measuring instrument, when the length of the steel plate is the cut-to-length length + 10-15 mm, it is automatically cut, but priority should be given to ensuring that both sides of the arc or artificial mark defects can be cut cleanly, as shown in Figure 2 ;

[0044] ② Gauge plate: when the steel plate is opened to a position where both sides of the arc or artificial mark defects can be cut cleanly, the length data of the length measuring instrument is read and automatically cut (but priority should be given to ensuring that the actual length of the steel plate does not exceed the upper limit of the planned length).

[0045] 4) When the second section is multiple sub-plates, the system reads the planned "cut-to-length / referenced gauge length", and the specific cutting method is as follows:

[0046] ① According to the length data of the length measuring instrument, when the length of the steel plate is the "cut-to-length / referenced gauge length" + 10-15 mm, it is automatically cut;

[0047] ② Repeat the action until the last sub-plate of the second section, when the last sub-plate is a cut-to-length plate, according to the length data of the length measuring instrument, when the length of the steel plate is the "cut-to-length length" + 10-15 mm, it is automatically cut (but priority should be given to ensuring that both sides of the arc or artificial mark defects can be cut cleanly), when the last sub-plate is a gauge plate, when the steel plate is opened to a position where both sides of the arc or artificial mark defects can be cut cleanly, the length data of the length measuring instrument is read and automatically cut (but priority should be given to ensuring that the actual length of the steel plate does not exceed the upper limit of the planned length).

[0048] The automatic cutting system function (the same as the segmented second section steel plate) has the following functions:

[0049] A, slab tracking: 1) Establish a position coordinate axis in the entire cut-to-length shear area, with the shear blade position as the "0" position, the first 50 meters to the last 40 meters as the overall tracking area, and a tracking trigger point (cold detection or photoelectric switch) at the connection position of the disc shear rear conveying roller and the cut-to-length shear front roller, when the steel plate passes through the trigger point, the head and tail positions are tracked by speed integration method, and the position is corrected when passing through the corresponding sensor on the line, the speed integration data is mainly based on the running speed of each roller, and the length feedback of the speed measuring length measuring instrument is used for the steel plate before and after the cut-to-length shear to improve the position tracking accuracy of the cut-to-length slab;

[0050] 2) When the mother plate is cut in the cut-to-length shear, the cut steel plate can form a new number of slabs and start to be tracked;

[0051] 3) The tracking system can track up to 10 steel plate positions at the same time, and display them in different colors on the HMI screen. The tracking data is used to prompt the operator and other functions in the system.

[0052] B, Shearing procedure establishment: Since the original system, the speed measurement system has established communication with the MES system, after detecting the steel plate information in the cold detection before the sizing machine, the steel plate PDI information is automatically obtained, and the shearing procedure is confirmed, so the newly added optimized shearing control system will establish TCP / IP communication with the speed measurement system and obtain the same information, establish the shearing procedure, and set the sizing amount input window in the HMI screen. The data will automatically operate with the original shearing procedure to form the final shearing procedure. This procedure can be manually input, corrected, stored, called, etc. It is used when there is no steel plate PDI information or when the incoming material and information are inconsistent. The intelligent shearing procedure is as follows Figure 3 .

[0053] C, Steel plate position APC closed loop control: Specifically:

[0054] In automatic mode, the speed value of the roller is controlled by PLC, and the steel plate length feedback signal detected by the speed measurement instrument is received to form a position closed loop control to provide accurate positioning in the length direction of the steel plate;

[0055] APC control is the basis of automatic shearing of sizing shear. Positioning accuracy and positioning speed are directly related to product quality and production speed;

[0056] The reference of APC positioning is the length target value of each sub-plate shearing procedure;

[0057] The system calculates the length deviation ΔS (target value - actual value) according to the actual length feedback by the length measuring instrument. The relationship between the roller speed V and the roller gap deviation ΔS is as follows:

[0058]

[0059] The polarity of the speed V is determined according to the positive and negative of ΔS, and the size of K is adjusted in sections according to the size of ΔS, and limit characteristics and dead zone characteristics are used. When ΔS is greater than the deceleration point, V = Vmax, and when ΔS is less than the dead zone value, V = 0.

[0060] Due to the special nature of the roller conveying steel plate, too fast lifting speed may cause relative sliding between the steel plate and the roller, affecting the actual positioning accuracy. In order to ensure the accuracy and high speed of the roller positioning, different maximum speeds Vmax and slopes K need to be specified in different deviation ranges to ensure that there is no relative sliding during final positioning, while ensuring high speed in a large range to improve the shearing rhythm.

[0061] The transmission device needs to be optimized to ensure the speed following response of the roller bed in the low speed range. Since the roller bed transmission is usually open-loop controlled, an incremental encoder is added to change to closed-loop control or use the feedback data of the side length instrument as the optimization basis.

[0062] The length setting roller bed speed output control schematic diagram is shown in Figure 4 .

[0063] The above description is only used to illustrate the technical solutions of the present application, not to limit the present application. Other modifications or equivalent replacements to the technical solutions of the present application made by those skilled in the art should be covered in the scope of the claims of the present application, as long as they do not deviate from the spirit and scope of the present application.

Claims

1. A gauge length shear intelligent shearing system, characterized in that: It includes the following instrument configuration: Laser speed and length measuring instrument: To measure the length of steel plate in real time, as the main data basis for automatic shearing closed-loop control; Cold metal detector: A cold metal detector is installed 40-50 meters before the cut-to-length shear, which is used to track the initial position of the steel plate entering the cut-to-length shear area. Two cold metal detectors are installed at 8 meters and 10 meters after the shear roller, which are used to automatically check the measurement data; Light curtain detection: A light curtain detection is installed within 1 meter before the head shear, which is used to detect the head, thereby completing the automatic shearing of the head; Tail imaging system: A tail detection system is installed 3-5 meters before the cut-to-length shear. Through the signal data of the speedometer and the front and rear photoelectric switches, the system determines the detection timing and the speed of the measured object. Through the steel plate edge measured by the detector, the profile of the tail of the steel plate is fitted, thereby providing the basis for the length of the tail that should be cut off for the shearing system; The shearing system includes intelligent shearing control function and automatic shearing system function: The intelligent shearing control function is for the segmented steel plate of the head shear and the unsegmented steel plate of the head shear; The segmented steel plate of the head shear includes the following: 1) When the first section is a single sub-plate, the sub-plate directly passes through the cut-to-length shear without shearing, but the length value measured by the length measuring system is collected for steel plate positioning; 2) When the first section is a multi-cut-to-length mother plate, the system reads the planned "cut-to-length" or "reference pass length". The specific shearing method is as follows: ① According to the length data of the laser speed and length measuring instrument, when the length of the steel plate is "cut-to-length" + 10-15mm or "reference pass length" + 10-15mm, automatic shearing is performed; ② Repeat the shearing action until the last sub-plate of the first section. When the last sub-plate is a cut-to-length plate, the length allowance is <30mm, and no shearing is performed. When the length allowance is >30mm, a supplementary cut is performed to avoid length exceeding the standard. When the last sub-plate is a pass plate, the sub-plate directly passes through the cut-to-length shear without shearing; 3) When the second section is a single sub-plate, the system reads the planned "cut-to-length" or "reference pass length". The specific shearing method is as follows: ① Cut-to-length plate: according to the length data of the laser speed and length measuring instrument, when the length of the steel plate is cut-to-length + 10-15mm, automatic shearing is performed. However, it is necessary to ensure that both sides of the arc or artificial mark defects can be cut off completely; ② Pass plate: when the steel plate is opened to a position where both sides of the arc or artificial mark defects can be cut off completely, the length data of the laser speed and length measuring instrument is read, and automatic shearing is performed; 4) When the second section is a multi-sub-plate, the system reads the planned "cut-to-length" or "reference pass length". The specific shearing method is as follows: ① According to the length data of the laser speed and length measuring instrument, when the length of the steel plate is "cut-to-length" + 10-15mm or "reference pass length" + 10-15mm, automatic shearing is performed; ② Repeat the shearing action until the last sub-plate of the second section. When the last sub-plate is a cut-to-length plate, according to the length data of the laser speed and length measuring instrument, when the length of the steel plate is "cut-to-length" + 10-15mm, automatic shearing is performed. When the last sub-plate is a pass plate, the steel plate is opened to a position where both sides of the arc or artificial mark defects can be cut off completely, the length data of the laser speed and length measuring instrument is read, and automatic shearing is performed; The automatic shearing system function includes the following functions: A, slab tracking; B, shearing procedure establishment; C, steel plate position APC closed loop control.

2. The intelligent cutting system of claim 1, wherein: The slab tracking is specifically: 1) Establish a position coordinate axis in the entire sizing shear area, with the shearing blade position as the "0" position, the front 50 meters to the rear 40 meters as the overall tracking area, and a tracking trigger point set at the connection position of the cut head shear rear conveying roller and the sizing shear front roller. When the steel plate passes through the trigger point, the head and tail positions are tracked by the speed integration method, and the position is corrected when passing through the corresponding sensor on the line. The speed integration data is mainly based on the running speed of each roller, and the length feedback of the laser speed measuring instrument is used for the steel plate before and after the sizing shear to improve the position tracking accuracy of the sizing slab; 2) When the mother plate is segmented in the sizing shear, the segmented steel plate forms a new number of slabs and starts to be tracked; 3) The automatic shearing system can track the positions of 10 steel plates at the same time, and use different colors to distinguish and display on the HMI screen. The tracking data is used for operator prompting and other functions in the system.

3. The intelligent cutting system of claim 1, wherein: The shearing procedure establishment includes the following specifics: the shearing control system establishes TCP / IP communication with the laser speed measuring instrument. After the cold metal detector before the sizing machine detects the steel plate information, the shearing procedure is established. In the HMI screen, there is a size input window for temporarily manually inputting the shearing procedure when there is no steel plate PDI information or the incoming material and information are inconsistent.

4. The intelligent cutting system of claim 1, wherein: The steel plate position APC closed loop control is specifically: In automatic mode, the PLC controls the speed value of the roller, receives the steel plate length feedback signal detected from the laser speed measuring instrument, forms a position closed loop control, and provides accurate positioning in the length direction of the steel plate; The reference of APC positioning is the length target value of each sub-plate shearing procedure; The system calculates the length deviation ΔS according to the actual length feedback of the laser speed measuring instrument, ΔS = length target value - actual length value. The relationship between roller speed V and length deviation ΔS is: Determine the polarity of speed V according to the positive and negative of ΔS, and adjust K in segments according to the size of ΔS. Limit characteristics and dead zone characteristics are used when ΔS is greater than the deceleration point, V = Vmax, and when ΔS is less than the dead zone value, V = 0.

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