A timing control optimization method for slab online fire cutting

Abstract

A kind of slab online flame cutting timing control optimization method, based on the PLC for controlling flame cutting machine, the PLC for controlling jet printer, the PLC for controlling deburring machine, the PLC for controlling roller between establishing communication coupling, the PLC for controlling roller and slab yard HMI interface server between establishing network communication;With the empty signal of each area as trigger signal, establish automatic blank control.The slab online flame cutting timing control optimization method of the present application, sequence realizes the function that slab is cut on roller, waits, measures jet printing, automatic two cuts and in turn leaves cutting area, through cutting action automation management, establishes compact timing control logic, effectively improves production efficiency.

Description

Technical Field

[0001] This invention belongs to the field of thick plate slab cutting operations, and specifically relates to a timing control optimization method for online fire cutting of slabs. Background Technology

[0002] The second cutting line of the thick slab silo mainly completes the tasks of receiving and secondary cutting of continuously cast slabs. The main equipment includes: receiving A group roller conveyor, transfer machine (transverse trolley, lifting hydraulic cylinder), loading platform, unloading platform, B group roller conveyor, centering device, mother billet length measuring device, inkjet printer (mechatronics), No. 1 and No. 2 cutting machines (mechatronics), deburring machine (mechatronics), and supporting overhead cranes, etc.

[0003] In the online slab cutting process, the blank waits to oscillate. After the roller conveyor in the cutting machine area is emptied, the blank feeding action is manually initiated. Before entering the cutting area, the blank needs to be measured and printed online, which consumes a certain amount of time. At this time, if the blank is triggered in advance, the production efficiency of the second cutting line can be improved. However, under manual operation, the starting point is not easy to control in actual operation. Early blank feeding has risks such as jamming after printing and collision with the blank in the cutting area. Delayed start affects production efficiency.

[0004] The invention application with application number CN201510276092.0 discloses "a slab cutting optimization method and control system based on molten steel quantity conversion". This method receives production casting plans and slab cutting commands from the production management system, acquires basic slab cutting data, and receives cutting performance feedback through a basic automation level. It determines the calculated casting length based on the converted casting length and the casting length of the casting flow, and adjusts the calculated cutting range based on the cutting performance feedback. It then performs cutting optimization calculations according to the length range of the cutting command, generates the optimal cutting scheme, sets the cutting parameters, and controls the slab cutting. By predicting the cutting volume of molten steel in the ladle and tundish, the method expands the calculated cutting range, increases the number of predicted calculation blocks for slab cutting, improves the calculation range and accuracy of slab cutting, ensures smooth and stable production logistics, and reduces waste of molten steel at the tail end.

[0005] The invention application with application number CN201611174150.X discloses "a dynamic slab cutting design method and system", which includes: receiving production order information sent by an ERP system and generating an original cutting plan based on the production order information; receiving converter performance information dynamically sent by a secondary continuous casting system and dynamically generating slab cutting plan information based on the original cutting plan and converter performance information; sending the slab cutting plan information to the secondary continuous casting system so that the secondary continuous casting system executes the slab cutting plan information; and receiving slab cutting performance information sent by the secondary continuous casting system.

[0006] The invention application with application number CN 202110899295.0 discloses "a process method for cutting vertical continuous casting stainless steel slabs", which includes a start-up module, a cutting module, a cutting module, an encounter module, a waiting module, a cutting-off module and a return-to-zero module arranged in sequence. The internal equipment actions and logic of each functional module, as well as the conversion between functional modules, are all completed automatically by a programmable controller. The seven modules cooperate with each other to complete the cutting of vertical continuous casting stainless steel slabs. Summary of the Invention

[0007] To address the above problems, this invention provides a timing control optimization method for online fire cutting of slabs, the specific technical solution of which is as follows:

[0008] A method for optimizing the timing control of online fire cutting of slabs, characterized in that:

[0009] Communication coupling is established between the PLCs controlling the flame cutting machine, the inkjet printer, the deburring machine, and the roller conveyor; network communication is established between the PLC controlling the roller conveyor and the HMI interface server of the slab warehouse; automatic slab feeding control is established using the air-emptying signal of each zone as the trigger signal.

[0010] According to the present invention, a timing control optimization method for online fire cutting of slabs is characterized in that:

[0011] The automatic blank feeding includes: automatic blank feeding from the transplanter to zone B1, and automatic blank feeding from zone B1 to the cutting zone;

[0012] in,

[0013] The transplanter automatically feeds the blank into zone B1, with the clearing of zones B1 and B2 as the trigger signal;

[0014] The automatic feeding of blanks from zone B1 to the cutting zone is achieved through real-time monitoring of the cutting torch spacing based on the emptying time of the cutting zone. When the cutting torch spacing reaches the set value, the automatic feeding of blanks from zone B1 to the cutting zone is triggered.

[0015] According to the present invention, a timing control optimization method for online fire cutting of slabs is characterized in that:

[0016] The timing control optimization also includes: timing control optimization and timing logic optimization throughout the entire operation process from billet oscillation to completion of cutting;

[0017] The timing control optimization includes: type-based cancellation of oscillation optimization when entering area B1;

[0018] The timing logic optimization mentioned above is achieved by completing the length measurement setup in advance.

[0019] According to the present invention, a timing control optimization method for online fire cutting of slabs is characterized in that:

[0020] Entering area B1, cancel oscillation optimization by type, as follows:

[0021] L1 obtains the type of slab currently entering zone B1 in real time. When the obtained slab type is hot slab, it enters zone B1 and oscillates; when the obtained slab type is cold slab, it enters zone B1 and waits at rest.

[0022] According to the present invention, a timing control optimization method for online fire cutting of slabs is characterized in that:

[0023] The aforementioned timing logic optimization is achieved by pre-establishing the length measurement, specifically as follows:

[0024] When the slab is fed into zone B1, the distance between the cutting torches in the cutting zone is monitored and compared in real time. When the distance between the cutting torches meets the triggering conditions, the roller conveyor PLC sends a signal to trigger the slab to move forward. The slab is first fed into zone B2 to complete the centering, and then fed into zone B3 to complete the length measurement. After the length measurement is completed, the slab is returned to zone B2.

[0025] According to the present invention, a timing control optimization method for online fire cutting of slabs is characterized in that:

[0026] After the length measurement is completed, the slab retracts to area B2, and the cutting zone is triggered by the slab triggering the back grating of the cutting zone to advance for printing and cutting signals.

[0027] According to the present invention, a timing control optimization method for online fire cutting of slabs is characterized in that:

[0028] The timing control optimization also includes: optimization of the centering time when entering area B2.

[0029] According to the present invention, a timing control optimization method for online fire cutting of slabs is characterized in that:

[0030] The aforementioned optimization of the centering time for entering zone B2 is achieved by optimizing the real-time centering opening time based on the actual width of the slab.

[0031] According to the present invention, a timing control optimization method for online fire cutting of slabs is characterized in that:

[0032] The timing control optimization also includes: optimization of the spacing control between the front and rear blanks.

[0033] According to the present invention, a timing control optimization method for online fire cutting of slabs is characterized in that:

[0034] The decision on whether or not to advance a slab is based on whether the adjacent designated sections of the current slab are cleared in real time.

[0035] If the adjacent designated section is vacated, the slab will move forward; otherwise, the slab will stop moving forward.

[0036] According to the present invention, a timing control optimization method for online fire cutting of slabs is characterized in that:

[0037] The adjacent defined segments are two adjacent segments.

[0038] This invention discloses a timing control optimization method for online slab cutting. Firstly, based on the communication coupling between PLCs and the communication between the PLCs and the HIM interface server, it improves the conversion of manual slab entry confirmation to automatic slab entry control, thereby increasing the efficiency and accuracy of slab entry cycle control. Furthermore, through timing optimization and timing logic optimization throughout the entire operation process, it achieves overall timing optimization, improving and ensuring production efficiency. The improvement from manual to automatic control is reflected in both the slab's movement from zone B1 to the cutting zone and the transfer machine's delivery of the slab to zone B1. The timing optimization of the entire operation process is comprehensively reflected in three dimensions: the first dimension is the optimization of centering time; the second dimension is the optimization of advance length measurement; and the third dimension is the optimization of slab departure time. In summary, the present invention provides a timing control optimization method for online fire cutting of slabs. By implementing this technical solution, the completion and departure times of slab cutting can be monitored in real time, and the parameters can be adjusted according to the changing working conditions to optimize the automatic timing control strategy and accurately determine the starting point of the mother billet entry. After the slab completes the length measurement and printing operations, it is tightly connected with the next set of roller conveyor areas, which can maximize the improvement of work efficiency. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the work process targeted by the present invention;

[0040] Figure 2 This is a schematic diagram of the B02 roller conveyor start-up condition optimization procedure of the present invention;

[0041] Figure 3 This is a schematic diagram of the cold billet oscillation condition cancellation procedure of the present invention;

[0042] Figure 4 This is a schematic diagram of the slab centering logic optimization program of the present invention;

[0043] Figure 5 This is a schematic diagram of the B04 roller conveyor start-up logic optimization program;

[0044] Figure 6 A schematic diagram of the optimization procedure for slab departure conditions on roller conveyors B04-B06;

[0045] Figure 7 A schematic diagram of the optimization program for the speed of roller conveyor B04;

[0046] Figure 8 This is a schematic diagram of the B03 roller conveyor start-up logic optimization program;

[0047] Figure 9 A schematic diagram illustrating the modification of the logic for not printing the length measurement of B03.

[0048] Figure 10 This is a schematic diagram illustrating the modified operating logic of roller conveyor B02.

[0049] Figure 11 This is a schematic diagram illustrating the modified operating logic of roller conveyor B04.

[0050] Figure 12 This is a schematic diagram of the optimized start-up logic for roller conveyor B03.

[0051] Figure 13 Schematic diagram for optimizing the occupancy conditions of the cutting area;

[0052] Figure 14 This is a schematic diagram of the optimized rollback of slabs B03-B02. Detailed Implementation

[0053] The timing control optimization method for online fire cutting of slabs according to the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0054] An optimization method for timing control of online fire cutting of slabs.

[0055] Communication coupling is established between the PLCs controlling the flame cutting machine, the inkjet printer, the deburring machine, and the roller conveyor; network communication is established between the PLC controlling the roller conveyor and the HMI interface server of the slab warehouse; automatic slab feeding control is established using the air-emptying signal of each zone as the trigger signal.

[0056] in,

[0057] The automatic blank feeding includes: automatic blank feeding from the transplanter to zone B1, and automatic blank feeding from zone B1 to the cutting zone;

[0058] in,

[0059] The transplanter automatically feeds the blank into zone B1, with the clearing of zones B1 and B2 as the trigger signal;

[0060] The automatic feeding of blanks from zone B1 to the cutting zone is achieved through real-time monitoring of the cutting torch spacing based on the emptying time of the cutting zone. When the cutting torch spacing reaches the set value, the automatic feeding of blanks from zone B1 to the cutting zone is triggered.

[0061] in,

[0062] The timing control optimization also includes: timing control optimization and timing logic optimization throughout the entire operation process from billet oscillation to completion of cutting;

[0063] The timing control optimization includes: type-based cancellation of oscillation optimization when entering area B1;

[0064] The timing logic optimization mentioned above is achieved by completing the length measurement setup in advance.

[0065] in,

[0066] Entering area B1, cancel oscillation optimization by type, as follows:

[0067] L1 obtains the type of slab currently entering zone B1 in real time. When the obtained slab type is hot slab, it enters zone B1 and oscillates; when the obtained slab type is cold slab, it enters zone B1 and waits at rest.

[0068] in,

[0069] The aforementioned timing logic optimization is achieved by pre-establishing the length measurement, specifically as follows:

[0070] When the slab is fed into zone B1, the distance between the cutting torches in the cutting zone is monitored and compared in real time. When the distance between the cutting torches meets the triggering conditions, the roller conveyor PLC sends a signal to trigger the slab to move forward. The slab is first fed into zone B2 to complete the centering, and then fed into zone B3 to complete the length measurement. After the length measurement is completed, the slab is returned to zone B2.

[0071] in,

[0072] After the length measurement is completed, the slab retracts to area B2, and the cutting zone is triggered by the slab triggering the back grating of the cutting zone to advance for printing and cutting signals.

[0073] in,

[0074] The timing control optimization also includes: optimization of the centering time when entering area B2.

[0075] in,

[0076] The aforementioned optimization of the centering time for entering zone B2 is achieved by optimizing the real-time centering opening time based on the actual width of the slab.

[0077] in,

[0078] The timing control optimization also includes: optimization of the spacing control between the front and rear blanks.

[0079] in,

[0080] The decision on whether or not to advance a slab is based on whether the adjacent designated sections of the current slab are cleared in real time.

[0081] If the adjacent designated section is vacated, the slab will move forward; otherwise, the slab will stop moving forward.

[0082] in,

[0083] The adjacent defined segments are two adjacent segments.

[0084] Working principle and process

[0085] like Figure 1 As shown, the online slab fire-cutting production line includes a slab transplanting machine, a centering device, a mother billet length measuring system, a slab number printing device, two online fire-cutting machines, a deburring machine, and an offline warehousing roller conveyor for the sub-slabs. Figure 1 The B1 area is the waiting swing area, the B2 area is the centering area, the B3 area is the length measurement and printing area, the B4-B6 areas are the #1 cutting area, and the B7-B8 areas are the #2 cutting area. The slab warehouse two-line control system is controlled by multiple PLCs. The flame cutting machine, the printing machine, and the deburring machine are each equipped with one S7-300 PLC for control, and the roller conveyor is controlled by one S7-400 PLC. The three S7-300 PLCs communicate with the S7-400 PLCs via DP-Coupler. The slab warehouse HMI screen consists of one server and multiple terminals, using the Siemens WinCC standard Server-Client structure, and is connected to the S7-400 PLC via Ethernet.

[0086] Taking the manual confirmation of billet feeding as an example, the following is a comparative explanation of the original technology and the present technical solution:

[0087] Existing technology:

[0088] a. The first blank moves laterally into the B1 roller conveyor and begins to oscillate in the B1 area; wait for the 1# (B4-B6) and 2# (B7-B8) cutting areas to be emptied.

[0089] b. After the cutting area is empty, manually click the "Bill Confirmation" button. The first blank will stop oscillating and enter the B2 area to complete the centering.

[0090] c. The mother blank enters area B3 for length measurement and printing. It then enters cutting area #2, is positioned, and is ready to begin flame cutting. d. The operator manually clicks "Transplanter Confirmation," and the second mother blank enters area B1 and begins oscillation.

[0091] e. The first blank is positioned in the #2 cutting area and fire cutting begins. At this time, the #1 cutting area is empty. The operator clicks "Blank Confirmation". The second blank ends its swing, is centered in B2, and enters B3 to complete length measurement and printing. Then it enters the #1 cutting area for positioning and fire cutting begins.

[0092] f. For the next round of master blanks, manually click "Transplanter Confirmation" to move the slab into area B1 and wait for it to swing.

[0093] 1) The improvements to this point are as follows:

[0094] During production, the "blank entry confirmation" of the slab relies on manual operation, which can easily lead to shift discrepancies. After the cutting area is cleared, the slab is entered, and the cutting cycle begins with length measurement and printing, resulting in some "waste." When measuring the slab, the measurement system requires high accuracy, and the roller conveyor operates at the lowest crawling speed, which takes a relatively long time.

[0095] It is proposed to increase the cutting machine process signal by adding the L1 layer of the roller conveyor control, automatically control the pre-measurement of the blank, and optimize the timing control to improve efficiency.

[0096] a. The oscillation of the cold billet on roller conveyor B1 is cancelled.

[0097] The slab oscillation method is distinguished by the hot slab marking in the slab information message. For cold slabs, oscillation is canceled; for hot slabs, the original scheme is maintained. Oscillation of hot slabs in zone B1 can prevent malfunctions caused by prolonged heating of the roller conveyor.

[0098] (In the original plan, all slabs would automatically oscillate in zone B1.)

[0099] b. B1 roller conveyor end oscillation logic

[0100] Based on the online timing calculation of the slab, the oscillation is automatically stopped and the billet feeding is started.

[0101] (Original plan: manual clicking of "confirm billet delivery")

[0102] Detailed explanation of the startup logic calculation for timing control points:

[0103] First blank: Blank B1 ends oscillation → B2 area centering → blank length measurement → retract and wait → second start, direct printing, enter the cutting area for positioning.

[0104] The second blank: During continuous production, after lateral movement, it directly enters the B2 area for centering and waits for the automatic trigger point (the blank is automatically measured and printed, and then enters the No. 1 cutting area for positioning).

[0105] Example table: The table below shows a specific optimization process.

[0106]

[0107] The specific improvements to each part are described below:

[0108] The automated control scheme for the slab secondary cutting line involves adapting the software functions of the basic automation system in the slab warehouse and the process computer, as well as modifying the interface between the basic automation and process computer systems to meet the requirements of increasing the production speed of the secondary cutting line. Specific implementation steps:

[0109] 1) Optimization of slab oscillation in region B2

[0110] After the slab reaches the B1 roller conveyor, it advances to the B2 roller conveyor for positioning, where the centering device completes the axial centering of the slab. If the conditions for entering the B3-8 region are not met, the slab oscillates on the B2 roller conveyor until the conditions for entering the B3-8 region are met. Then, the slab is repositioned and centered on the B2 roller conveyor before advancing through B3. This part is the routine process logic.

[0111] The improvement in this part is as follows: When the slab oscillates in region B2, the space between the oscillation area and the cutting area is too large. For hot slabs: maintain the existing pattern; for cold slabs: cancel the oscillation, complete centering, and wait at position B2. This reduces the time spent on oscillation, repositioning, and re-centering. See the modified procedure below. Figure 2 , 3 .

[0112] 2) Optimization of slab centering time in region B2

[0113] In existing technology, after the slab reaches roller conveyor B1, it advances to roller conveyor B2 for positioning, where a centering device completes the axial centering of the slab. The slab centering time is too long, requiring 8 seconds to close and 4 seconds to open. This technical solution optimizes the interlocking conditions between centering and roller conveyor operation: the roller conveyor starts transporting immediately after the centering is opened for 1 second (the specific 1 second is determined based on the actual width of the slab plus a margin time), without waiting for centering to complete before starting the slab transport. This can increase the speed by approximately 3 seconds. The modified program is shown in Figure 4.

[0114] 3) After the #1 cutting machine finishes cutting, accelerate the separation speed of the blank.

[0115] When the slab head reaches the B4 roller conveyor, the slab's destination is determined based on the cutting requirements of L3 and the material occupancy in the cutting zone (B4 to B8 roller conveyors):

[0116] The slab is cut into two sub-slabs. When there is a slab on cutter #2, cutting is performed on cutter #1. When there is no slab on cutter #2 (cutter #2 is ready and there is no manual intervention), cutting is performed on cutter #2.

[0117] The slab is cut into 3 sub-slabs. Cutting is performed by cutter No. 1, while cutter No. 2 moves to the cutting position of cutter No. 1 to cut the slab.

[0118] When the slab reaches the predetermined cutting area, the roller conveyor control is transferred to the cutting machine to position the slab within the cutting area. After the cutting machine completes the cutting, it transmits the result to the L1 control system. Based on this information, the L1 control system transmits the two actual results to the L3 system for information flow processing. The finished sub-slabs are then sequentially transported out of the cutting area according to the cutting data. The above describes the conventional process logic of the prior art.

[0119] The optimization of this part is reflected in: judging the position of the sub-blank based on the actual cutting results, and optimizing the control program of roller conveyors B4-B8 to ensure a tighter time for the sub-blank to leave the roller conveyor, thus accelerating the process. In other words: previously, the cutting PLC controlled a single unit, treating the entire cutting area as an indivisible region; the optimization involves transferring control from the cutting machine PLC to the roller conveyor PLC, and then using the clearing of adjacent areas as a trigger signal for subsequent slab movements, thereby optimizing the timing of the front-to-back spacing. The program was modified as follows... Figure 5 , 6 As shown in Figures 7 and 8.

[0120] 4) The two mother billets in zones B1 and B2 were delivered to the steel plant ahead of schedule.

[0121] The process is modified in two ways: In the first, steel can be fed into the cutting zone while the process remains unchanged; in the second, steel cannot be fed into the cutting zone. The slab moves from B01 to B02 for positioning and centering, and then continues to B03. When the head of the slab reaches the B3 roller conveyor, the length measuring roller is lifted, and the slab storage L1 does not send printing data to the printer. Simultaneously, the roller conveyor continues to operate, measuring length but not printing. After completion, the slab retreats back to the B02 roller conveyor to wait. Once the conditions for steel feeding into the cutting zone are met, the slab moves to B03, completes printing, and then continues to enter the cutting zone.

[0122] The first slab enters the cutting area, and the second slab is on roller conveyor B1. The slab moves from B01 to B02 for positioning and centering. After that, it continues to move towards B03. When the head of the slab reaches roller conveyor B3, the length measuring roller is lifted. The slab storage L1 does not send printing data to the printer. At the same time, the roller conveyor continues to operate, measuring the length but not printing. After that, the slab retreats back to roller conveyor B02 to wait. Once the conditions for steel feeding in the cutting area are met, the slab moves towards B03, completes printing, and then continues to move into the cutting area.

[0123] The above describes the conventional process logic of the existing technology. The technical improvement here involves pre-measurement of length, as detailed in the initial description. Through program optimization, the first blank is pre-measured during the cutting process in the cutting zone, saving time. The second blank is measured during the movement and positioning of the first blank, shortening the interval between the two blanks and improving the overall speed. The modified program is as follows... Figures 8 to 14 As shown.

[0124] This invention discloses a timing control optimization method for online slab fire cutting. Firstly, based on the communication coupling between PLCs and the communication between the PLC and the HIM interface server, it improves the conversion of manual confirmation of billet entry to automatic billet entry control, thereby increasing the efficiency and accuracy of billet entry cycle control. Furthermore, through timing optimization and timing logic optimization throughout the entire operation process, it achieves overall timing optimization, improving and ensuring production efficiency. The improvement from manual to automatic control is reflected in both the billet's movement from zone B1 to the cutting zone and the transfer machine's delivery of the billet to zone B1. The timing optimization of the entire operation process is comprehensively reflected in three dimensions: the first dimension is the optimization of centering time; the second dimension is the optimization of advance length measurement; and the third dimension is the optimization of billet departure time. In summary, this invention's timing control optimization method for online slab fire cutting, by implementing this technical solution, orderly realizes the functions of billet waiting for cutting on the roller conveyor, measurement and printing, automatic second cutting, and sequential departure from the cutting area. Through automated management of cutting actions and the establishment of compact timing control logic, it effectively improves production efficiency.

Claims

1. A method for optimizing the timing control of online fire cutting of slabs, characterized in that: Based on establishing communication coupling between the PLC controlling the flame cutting machine, the PLC controlling the inkjet printer, the PLC controlling the deburring machine, and the PLC controlling the roller conveyor, network communication is established between the PLC controlling the roller conveyor and the HMI interface server of the slab library. Automatic billet feeding control is established using the clearance signal of each zone as the trigger signal. The automatic blank feeding includes: the transplanter automatically feeding blanks into zone B1, and zone B1 automatically feeding blanks into the cutting zone. Zone B1 is the waiting area for swinging, and Zone B2 is the centering area; in, The transplanter automatically feeds the blank into zone B1, with the clearing of zones B1 and B2 as the trigger signal; The automatic feeding of blanks from zone B1 to the cutting zone is achieved through real-time monitoring of the cutting torch spacing based on the emptying time of the cutting zone. When the cutting torch spacing reaches the set value, the automatic feeding of blanks from zone B1 to the cutting zone is triggered. The timing control optimization method further includes: timing control optimization and timing logic optimization throughout the entire operation process from billet oscillation to completion of cutting; The timing control optimization includes: type-based cancellation of oscillation optimization when entering area B1; The aforementioned timing logic optimization is achieved by pre-establishing the length measurement, specifically as follows: When the slab is fed into zone B1, the distance between the cutting torches in the cutting zone is monitored and compared in real time. When the distance between the cutting torches meets the triggering conditions, the roller conveyor PLC sends a signal to trigger the slab to move forward. The slab is first fed into zone B2 to complete the centering, and then fed into zone B3 to complete the length measurement. After the length measurement is completed, the slab is returned to zone B2.

2. The timing control optimization method for online fire cutting of slabs according to claim 1, characterized in that: Entering area B1, cancel the swing optimization by type as follows: The L1 control system obtains the type of slab currently entering zone B1 in real time. When the obtained slab type is hot slab, it enters zone B1 to oscillate; when the obtained slab type is cold slab, it enters zone B1 to wait stationary.

3. The timing control optimization method for online fire cutting of slabs according to claim 1, characterized in that: After the length measurement is completed, the slab retracts to area B2, and the cutting zone is triggered by the slab triggering the back grating of the cutting zone to advance for printing and cutting signals.

4. The timing control optimization method for online fire cutting of slabs according to claim 1, characterized in that: The timing control optimization also includes: optimization of the centering time when entering area B2.

5. The timing control optimization method for online fire cutting of slabs according to claim 4, characterized in that: The aforementioned optimization of the centering time for entering zone B2 is achieved by optimizing the real-time centering opening time based on the actual width dimensions of the slab.

6. The timing control optimization method for online fire cutting of slabs according to claim 1, characterized in that: The timing control optimization also includes: optimizing the spacing between the front and rear blanks.

7. The timing control optimization method for online fire cutting of slabs according to claim 6, characterized in that: The decision on whether or not to advance a slab is based on whether the adjacent designated sections of the current slab are cleared in real time. If the adjacent designated section is vacated, the slab will move forward; otherwise, the slab will stop moving forward.

8. The timing control optimization method for online fire cutting of slabs according to claim 7, characterized in that: The adjacent defined segments are two adjacent segments.

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