Automatic control method for grinding table of wide and thick plate finishing line

Abstract

The present invention belongs to the field of metallurgical automation for wide and thick plates, and relates to a method for automatic control of a grinding table in a wide and thick plate finishing line. The method combines advanced automatic control, machine vision, material tracking and other technologies to achieve automatic transportation of the grinding table entrance / exit rollers, automatic loading and unloading of the grinding table, and automatic transportation control of the grinding table body. It includes functions such as automatic panel splicing, automatic panel connection, automatic panel flipping, automatic loading / unloading of steel plates, and automatically generates production reports, sending the steel plate data of the grinding table to downstream processes. In response to the diverse production requirements of the grinding table, the present invention achieves fully automatic material tracking and fully automatic control of the grinding table, overcomes the problem that the grinding table process is complex and difficult to fully automate, effectively reduces the workload of operators, improves production efficiency, and at the same time ensures the smooth progress of downstream processes.

Description

Technical Field

[0001] The invention belongs to the field of wide and thick plate metallurgy automation, and relates to an automatic control method for a grinding table of a wide and thick plate finishing line. Background Art

[0002] The grinding table is an important part of the wide and thick plate production line. It consists of the grinding table entrance / exit rollers, grinding table loading / unloading devices, grinding table body and other parts. It is usually installed after the cooling bed process to assist the cooling bed in naturally cooling the rolled pieces to a suitable temperature and complete the transportation of the rolled pieces. It also needs to cooperate with the intermediate warehouse, fire cutting, flaw detection and other downstream processes in production. It is an important link in the production of wide and thick plates.

[0003] However, most of the current wide and thick plate grinding stations are manually or semi-automatically controlled. In traditional grinding station transportation, steel plates are arranged in a single row, and the space utilization rate of the grinding station is low. In addition, due to some special production requirements, such as flame cutting, plate turning, surface inspection, etc., it is sometimes necessary to frequently lift the steel plates on or off the grinding station, which requires more manual intervention and control operations. When the steel plates are lifted onto or off the cooling bed by the crane, the operator is required to constantly observe the working conditions, manually control the transportation of the grinding station, and manually insert or delete the steel plate data on the upper / lower lines, which is a cumbersome workload. When the steel plates need to be turned over for inspection, the operator and the crane operator are also required to communicate continuously, and the grinding station operator manually controls the transportation of the grinding station.

[0004] Furthermore, data from the grinding table was transmitted to downstream processes via paper schedules, making data communication between different processes cumbersome and impacting the efficiency of downstream processes. The complex production conditions and demands of the grinding table also made automated control of the table extremely difficult. Summary of the Invention

[0005] In response to the above technical problems, the present invention provides an automatic control method for the grinding table of a wide and thick plate finishing line. Through advanced automatic control, intelligent panelization model, machine vision, material tracking and other technologies, it realizes fully automatic material tracking and fully automatic control of the grinding table, automatically generates production reports, and sends the steel plate data of the grinding table to downstream processes.

[0006] The present invention is achieved through the following technical methods:

[0007] A method for automatically controlling a grinding table of a wide and thick plate finishing line, the method comprising the following steps:

[0008] (1) Automatic transportation of roller conveyor at the entrance of the grinding table: Track and correct the position of the steel plate according to the cold inspection signal on the roller conveyor side of the grinding table entrance, and combine the steel plate ID and steel plate size data issued by the automatic secondary control system to perform steel plate splicing, steel plate centering and automatic steel plate loading and positioning;

[0009] (2) Automatic loading of the grinding table: The loading lifting chain and the transport chain on the grinding table are controlled according to the loading control signal to complete the automatic loading of the grinding table. The loading control signal includes a loading lifting chain lifting signal, a loading lifting chain lowering signal, a loading lifting chain upper limit signal, a loading lifting chain lower limit signal, and a loading transport chain control signal;

[0010] (3) Automatic transportation of the grinding table body: According to the settings of priority feeding and priority waiting, the grinding table body chain transports the steel plates; during the transportation process, the plates are automatically connected, turned over, and loaded / unloaded;

[0011] (4) Automatic unloading of the grinding table: according to the steel plate position signal, the grinding exit roller signal, the grinding table unloading setting position, and the upper limit signal of the unloading lifting chain, the grinding table unloading transport chain is started, and the transportation distance of the grinding table unloading transport chain is accumulated and calculated according to the cold detection activation signal. When the transportation distance of the transport chain is greater than or equal to the steel plate width in the steel plate tracking information and the edge detection cold detection signal disappears, the transport chain is stopped, and the unloading lifting chain is lowered. The lower limit signal is activated to complete the automatic unloading operation;

[0012] (5) Automatic transportation of roller conveyor at the exit of the grinding table: According to the flaw detection signal sent by the third-level control system and the shearing signal sent by the second-level control system, the roller conveyor at the exit of the grinding table is controlled to transport the steel plate.

[0013] Furthermore, in step (1), a cold detection device is provided on each set of rollers at the entrance of the grinding table, and the position of the steel plate is corrected by the material tracking position obtained by the cold detection device;

[0014] The process of the steel plate splicing is carried out on the entrance roller of the grinding table or the entrance roller of the cooling bed. According to the arrangement position of the steel plates on the entrance roller, the control system transports the steel plates to the designated position of the entrance roller according to the calculation results. The specific steps of the steel plate splicing are as follows:

[0015] According to the steel plate length data sent by the secondary control system, the length sum of the two adjacent steel plates is calculated; if the length sum is less than the set value and the thickness deviation of the two adjacent steel plates is less than 20mm, the paneling conditions are met; the primary control system sends a paneling control instruction to control the roller to complete the paneling; after the paneling is completed, the distance between the steel plates is greater than or equal to 0.5m.

[0016] Furthermore, step (2) is specifically as follows: when the conditions for automatic loading of the grinding table are met, the first-level control system sends a lifting signal for the loading lifting chain on the grinding table. After the loading lifting chain on the grinding table is lifted into place, the upper limit signal of the loading lifting chain is activated, and the transport chain is started to transport the steel plate to the set loading position on the grinding table; after the steel plate is in place, the first-level control system sends a lowering signal for the loading lifting chain on the grinding table, waits for the loading lifting chain on the grinding table to drop into place, activates the lower limit signal of the loading lifting chain, and the grinding and loading is completed.

[0017] Furthermore, the automatic loading conditions of the grinding table include: the steel plate arrives at the position on the grinding table entrance roller and stops waiting for loading, the grinding table entrance roller and the grinding table loading and unloading chain cannot run at the same time, the encoder works normally, and the driver works normally.

[0018] Furthermore, in step (3), adjacent chains of the grinding table main body chain are staggered and connected; during the transportation of the grinding table, when the steel plate is transported through the adjacent chain joints, the two adjacent chains must run at the same time;

[0019] When the gap between adjacent steel plates on the grinding table is too large, the plates will be automatically retracted and connected. When the distance between adjacent steel plates is greater than or equal to 0.5m and less than or equal to 1m, the connection is completed.

[0020] Furthermore, in step (3), a flip check box is provided in the operation screen of the first-level grinding station. After checking the box, a flip steel plate ID signal is sent to the first-level control system. When the flip condition is met, the flip machine is controlled to flip the plate according to the steel plate flip signal; the steel plate flip signal includes: a flip steel plate position signal, an adjacent steel plate position signal, a transport chain transport signal, a flip machine control signal, and a driving position signal;

[0021] Among them, the flipping conditions include: the thickness of the flipping steel plate is less than or equal to 50mm; the flipping steel plate reaches the flipping machine's mechanical arm and is 0.5-0.2m away from the flipping machine's central axis; during the flipping process, the transport chain stops running; the steel plate adjacent to the flipping steel plate is greater than or equal to 0.5m away from the flipping machine; there is no crane directly above the flipping machine.

[0022] Furthermore, in step (3), when the steel plate needs to be lifted onto or off the grinding table by a crane, the specific method includes:

[0023] The secondary control system sends a steel plate on / off-line request signal, and the grinding station operator confirms the signal;

[0024] The crane operator locks the automatic control authority of the grinding table and uses the crane to lift the corresponding steel plate onto or off the grinding table;

[0025] Automatically identify, create or revoke corresponding steel plate data through machine vision system;

[0026] The steel plate ID and steel plate position coordinate information of the upstream / downline steel plates are changed, and temporary storage location data management of the intermediate warehouse is established in the secondary control system. The production report records of the upstream / downline steel plate data are automatically generated, and the updated steel plate data is sent to the downstream process.

[0027] Furthermore, step (4) specifically includes:

[0028] An upper limit switch and a lower limit switch are installed on the lifting chain of the grinding table, and the unloading steel plate is aligned on the side of the grinding table at the exit roller;

[0029] When the automatic unloading conditions of the grinding table are met, the unloading lifting chain of the grinding table is lifted, and after the upper limit signal is activated, the unloading transport chain of the grinding table starts and transports the steel plate to the set position of the grinding table exit roller;

[0030] When the steel plate reaches the edge of the exit roller, the edge detection cold inspection is activated and the transportation distance of the grinding table unloading transport chain begins to be accumulated. When the transportation distance of the transport chain is greater than or equal to the steel plate width in the steel plate tracking information and the edge detection cold inspection signal disappears, the grinding table unloading transport chain is stopped and the grinding table unloading lifting chain is lowered. When the grinding table unloading lifting chain is lowered into place, the lower limit signal is activated to complete the automatic unloading operation, and the steel plate is parked on the exit roller in the alignment position close to the grinding table side.

[0031] Furthermore, the automatic unloading conditions include: the grinding table exit roller and the grinding table unloading lifting chain are not running at the same time, the steel plate reaches the grinding table pre-unloading set position, there is no steel plate on the grinding table exit roller, the encoder works normally, and the driver works normally.

[0032] Furthermore, in step (5), the exit roller of the grinding table is provided with an edge detection cold inspection, and the edge detection cold inspection interval is not greater than the minimum length of the steel plate to be inspected; the steel plate inspection signal is read from the three-level control system, and when the steel plate needs to be inspected, the exit roller of the grinding table is controlled to transport the inspection plate to the inspection device; for the steel plate that does not need to be inspected, it is directly transported to the head shear.

[0033] Beneficial technical effects of the present invention:

[0034] (1) The present invention provides an automatic control method for a grinding table of a wide and thick plate finishing line, which automatically controls the loading and unloading of steel plates, the turnover of steel plates, and transportation through advanced automatic control, machine vision, material tracking, and other technologies, thereby realizing fully automatic material tracking and fully automatic control of the grinding table.

[0035] (2) The present invention provides an automatic control method for the grinding table of a wide and thick plate finishing line, which realizes the linkage control of the grinding table and the plate turning machine. By combining machine vision technology and automatic control technology to automatically turn the plate, the work intensity of workers is effectively reduced and diversified production needs are met.

[0036] (3) The present invention provides an automatic control method for the grinding table of a wide and thick plate finishing line. The grinding table can automatically splice plates through an intelligent splicing calculation model to save the space of the grinding table. An automatic plate splicing function is also provided. When the steel plate production is busy and the steel plates on the grinding table are unevenly arranged, the grinding table transport chain can be retracted to splice the plates, so that the arrangement between the steel plates is more uniform and compact, thereby realizing the optimization of the grinding table space and improving the utilization rate of the grinding table space.

[0037] (4) The present invention provides an automatic control method for the grinding table of a wide and thick plate finishing line, which realizes the automatic loading and unloading of steel plates on the grinding table through machine vision technology, overcoming the original problem that the operator needs to constantly observe the production conditions, manually control the loading and unloading of steel plates on the grinding table and modify the steel plate data, thereby greatly reducing the workload of the operator; and automatically modifying the production report and sending the steel plate data to the downstream process to ensure the smooth progress of the downstream process. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a structural diagram of the automatic control method for a grinding table in an embodiment of the present invention.

[0039] Figure 2 This is a structural diagram of the automatic loading / unloading method for grinding table steel plates in an embodiment of the present invention.

[0040] Figure 3 This is a structural diagram of the automatic unloading method for a grinding table in an embodiment of the present invention. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0042] On the contrary, the present invention covers any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention as defined by the claims. Furthermore, to facilitate a better understanding of the present invention, certain specific details are described in detail below in the detailed description of the present invention. Those skilled in the art will be able to fully understand the present invention without these details.

[0043] The present invention provides an automated control method for a grinding table on a wide and thick plate finishing line. By leveraging advanced automated control, machine vision, and material tracking technologies, the method enables automated roller conveyor transport at the grinding table entrance, automated loading, automated conveyance of the grinding table body, automated unloading, and automated conveyance of roller conveyor exits. This method achieves fully automated material tracking and control of the grinding table. The conveyance of the grinding table body also includes automated plate connection, automated loading and unloading of steel plates, and automated plate turnover.

[0044] In this embodiment, if Figure 1 As shown, the method includes the following steps:

[0045] (1) Automatic transportation of roller conveyor at the entrance of grinding table: Track and correct the position of steel plate according to the cold detection signal at the entrance roller conveyor side of grinding table, and combine the steel plate ID and steel plate size data issued by the automatic secondary control system to perform steel plate splicing, steel plate centering and automatic loading and positioning of steel plate; specifically:

[0046] A cold detection device is installed on each roller conveyor at the entrance of the grinding table. The material tracking position obtained by the cold detection device is used to correct the position of the steel plate.

[0047] The process of the steel plate splicing is carried out on the entrance roller of the grinding table or the entrance roller of the cooling bed. According to the arrangement position of the steel plates on the entrance roller, the control system transports the steel plates to the designated position of the entrance roller according to the calculation results. The specific steps of the steel plate splicing are as follows:

[0048] According to the steel plate length data sent by the secondary control system, the length sum of the two adjacent steel plates is calculated; if the length sum is less than the set value and the thickness deviation of the two adjacent steel plates is less than 20mm, the paneling conditions are met; the primary control system sends a paneling control instruction to control the roller to complete the paneling; after the paneling is completed, the distance between the steel plates is greater than or equal to 0.5m.

[0049] (2) Automatic loading of the grinding table: The loading lifting chain and the transport chain on the grinding table are controlled according to the loading control signal to complete the automatic loading of the grinding table. The loading control signal includes a loading lifting chain lifting signal, a loading lifting chain lowering signal, a loading lifting chain upper limit signal, a loading lifting chain lower limit signal, and a loading transport chain control signal;

[0050] (3) Automatic transportation of the grinding table body: According to the settings of priority feeding and priority waiting, the grinding table body chain transports the steel plates; during the transportation process, the plates are automatically connected, turned over, and loaded / unloaded;

[0051] (4) Automatic unloading of the grinding table: according to the steel plate position signal, the grinding exit roller signal, the grinding table unloading setting position, and the upper limit signal of the unloading lifting chain, the unloading transport chain of the grinding table is started, and the transportation distance of the transport chain is accumulated and calculated according to the cold detection activation signal. When the transportation distance of the transport chain is greater than or equal to the steel plate width in the steel plate tracking information and the edge detection cold detection signal disappears, the transport chain is stopped, and the unloading lifting chain is lowered. The lower limit signal is activated to complete the automatic unloading operation;

[0052] (5) Automatic transportation of roller conveyor at the exit of the grinding table: According to the flaw detection signal sent by the third-level control system and the shearing signal sent by the second-level control system, the roller conveyor at the exit of the grinding table is controlled to transport the steel plate.

[0053] Step (2) of this embodiment is specifically as follows: when the conditions for automatic loading of the grinding table are met, the primary control system sends a signal to raise the loading lifting chain on the grinding table. After the loading lifting chain on the grinding table is lifted into position, the upper limit signal of the loading lifting chain is activated, and the transport chain is started to transport the steel plate to the set loading position on the grinding table. After the steel plate is in position, the primary control system sends a signal to lower the loading lifting chain on the grinding table, waits for the loading lifting chain on the grinding table to lower into position, activates the lower limit signal of the loading lifting chain, and the grinding and loading is completed. Among them, the loading lifting chain on the grinding table and the grinding table entrance roller are cross-matched; the loading lifting chain on the grinding table is equipped with upper and lower limit switches.

[0054] In this embodiment, the automatic loading conditions of the grinding table include: the steel plate arrives at the position on the grinding table entrance roller and stops waiting for loading, the grinding table entrance roller and the grinding table loading and lifting chain cannot run at the same time, the encoder works normally, and the driver works normally.

[0055] In step (3) of this embodiment, adjacent chains of the grinding table main body chain are staggered and connected; during the transportation of the grinding table, when the steel plate is transported through the adjacent chain joints, the two adjacent chains must run at the same time;

[0056] When the gap between adjacent steel plates on the grinding table is too large, the plates will be automatically retracted and connected. When the distance between adjacent steel plates is greater than or equal to 0.5m and less than or equal to 1m, the connection is completed.

[0057] In step (3) of this embodiment, a flip check box is provided in the operation screen of the first-level grinding station. After checking the box, the flip plate ID signal is sent to the first-level control system. When the flip condition is met, the flip machine is controlled to flip the plate according to the steel plate flip signal.

[0058] In this embodiment, the plate turning machine is located in the middle of the No. 2 chain. The toothed mechanical arm of the plate turning machine and the No. 2 chain are arranged in an alternating manner. The toothed mechanical arm of the plate turning machine is 6 meters long and consists of two mechanical arms, No. 1 and No. 2. According to the transportation direction of the steel plate, the steel plate will first go to the No. 1 mechanical arm and then wait for turning over. The No. 1 mechanical arm is close to the feeding side of the grinding table. A turning over check box is set in the operation screen of the first-level grinding table. After checking, the ID signal of the turning steel plate is sent to the first-level control system. When the turning over condition is met, the plate turning machine is controlled to turn over according to the steel plate turning signal. The specific turning over steps are as follows:

[0059] Robot arm No. 2 starts to rise from 0°;

[0060] When the No. 2 robotic arm is raised to 30°, the No. 1 robotic arm starts to rise from 180°;

[0061] Robot arm No. 2 rotates to 105° and waits for robot arm No. 1 to rotate into position;

[0062] Robot arm No. 1 rotates to 105°;

[0063] Robot arms 1 and 2 rotate to 85° together to transfer the steel plates;

[0064] Robot arm 1 waits at 85°, while robot arm 2 rotates from 85° to 70°;

[0065] Robot arm 2 rotates from 70° to 0°, and robot arm 1 rotates from 85° to 180°;

[0066] During the flipping process, the No. 1 and No. 2 robotic arms rotate around the central axis of the flipper at the same speed; the No. 1 robotic arm rotates clockwise from 180° to 85° and counterclockwise from 85° to 180°; the No. 2 robotic arm rotates clockwise from 0° to 105° and counterclockwise from 105° to 0°.

[0067] The steel plate turning signal includes: turning plate position signal, adjacent steel plate position signal, transport chain transport signal, turning machine control signal, and driving position signal;

[0068] Among them, the flipping conditions include: the thickness of the flipping steel plate is less than or equal to 50mm; the flipping steel plate reaches the No. 1 mechanical arm of the flipping machine and is 0.5-0.2m away from the central axis of the flipping machine; during the flipping process, the transport chain stops running; the steel plate adjacent to the flipping steel plate is greater than or equal to 0.5m away from the position of the flipping machine; there is no crane directly above the flipping machine.

[0069] In step (3) of this embodiment, the steel plate is automatically put on / off the production line according to production requirements. When the steel plate needs to be lifted on or off the grinding table by a crane, Figure 1 As shown, the specific methods include:

[0070] The secondary control system sends a steel plate on / off-line request signal, and the grinding station operator confirms the signal;

[0071] The crane operator locks the automatic control authority of the grinding table and uses the crane to lift the corresponding steel plate onto or off the grinding table;

[0072] Automatically identify, create or revoke corresponding steel plate data through machine vision system;

[0073] The steel plate ID and steel plate position coordinate information of the upstream / downline steel plates are changed, and temporary storage location data management of the intermediate warehouse is established in the secondary control system. The production report records of the upstream / downline steel plate data are automatically generated, and the updated steel plate data is sent to the downstream process.

[0074] In this embodiment, if Figure 3 As shown, step (4) specifically includes:

[0075] An upper limit switch and a lower limit switch are installed on the unloading lifting chain of the grinding table, and the transport chain is controlled to transport the steel plate according to the steel plate position signal, the grinding outlet roller signal, the grinding table unloading setting position, the unloading lifting chain upper limit signal, the cold inspection activation signal, etc., to realize the automatic unloading function of the grinding table, and the unloading steel plate is aligned on the side of the grinding table at the exit roller;

[0076] When the automatic unloading conditions of the grinding table are met, the unloading lifting chain of the grinding table is lifted, and after the upper limit signal is activated, the unloading transport chain of the grinding table starts and transports the steel plate to the set position of the grinding table exit roller;

[0077] When the steel plate reaches the edge of the exit roller, the edge detection cold check is activated, and the cumulative calculation of the transportation distance of the grinding table unloading conveyor chain begins. When the transportation distance of the conveyor chain is greater than or equal to the steel plate width in the steel plate tracking information and the edge detection cold check signal disappears, the grinding table unloading conveyor chain is stopped, and the grinding table unloading lifting chain descends; when the grinding table unloading lifting chain descends into place, the lower limit signal is activated, the automatic unloading operation is completed, and the steel plate is parked on the exit roller in the alignment position on the grinding table side;

[0078] The transport distance of the transport chain is equal to the distance the steel plate is transported to the exit roller.

[0079] In this embodiment, the automatic unloading conditions include: the grinding table exit roller and the grinding table unloading lifting chain are not running at the same time, the steel plate reaches the pre-unloading set position of the grinding table, there is no steel plate on the grinding table exit roller, the encoder works normally, and the driver works normally.

[0080] (2) In this embodiment, in step (5), the exit roller of the grinding table is provided with an edge detection cold check, and the edge detection cold check interval is not greater than the minimum length of the steel plate to be inspected; the steel plate inspection signal is read from the three-level control system, and when the steel plate needs to be inspected, the exit roller of the grinding table is controlled to transport the inspection plate to the inspection device; for steel plates that do not need to be inspected, they are directly transported to the crop shear. The entrance and exit rollers of the grinding table are divided into four sections, which can be controlled separately.

[0081] The present invention provides an automatic control method for a grinding table on a wide and thick plate finishing line. By using advanced automatic control, machine vision, material tracking and other technologies, the method realizes fully automatic material tracking and fully automatic control of the grinding table. The method can meet the diverse production needs of the grinding table, automatically perform steel plate splicing, and save grinding table space. Furthermore, the method can further improve the space utilization rate of the grinding table by rolling back the plates. The method combines machine vision technology to realize automatic plate turning, automatic loading and unloading of steel plates, and automatically generates production reports to send the changed steel plate data to downstream processes, thereby ensuring the smooth progress of downstream processes. The present invention effectively overcomes the problem that the original grinding table process was complicated and difficult to fully automate, greatly reduces the workload of operators, thereby effectively reducing the work intensity of workers and greatly improving production efficiency.

[0082] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For ordinary technicians in this field, they can still modify or improve the technical solutions described above, which all fall within the scope of protection of the present invention.

Claims

1. An automatic control method for a grinding station of a wide and thick plate finishing line, characterized in that: The method comprises the following steps: (1) Automatic transportation of roller conveyor at the entrance of grinding table: Track and correct the position of steel plate according to the cold inspection signal at the entrance roller conveyor side of grinding table, and combine the steel plate ID and steel plate size data issued by the automatic secondary control system to perform steel plate splicing; (2) Automatic loading of the grinding table: The loading lifting chain and the transport chain on the grinding table are controlled according to the loading control signal to complete the automatic loading of the grinding table. The loading control signal includes a loading lifting chain lifting signal, a loading lifting chain lowering signal, a loading lifting chain upper limit signal, a loading lifting chain lower limit signal, and a loading transport chain control signal; (3) Automatic transportation of the grinding table body: According to the settings of priority feeding and priority waiting, the grinding table body chain transports the steel plates; during the transportation process, the plates are automatically connected, turned over, and loaded / unloaded; (4) Automatic unloading of the grinding table: according to the steel plate position signal, the grinding exit roller signal, the grinding table unloading setting position, and the upper limit signal of the unloading lifting chain, the grinding table unloading transport chain is started, and the transportation distance of the grinding table unloading transport chain is accumulated and calculated according to the cold detection activation signal. When the transportation distance of the transport chain is greater than or equal to the steel plate width in the steel plate tracking information and the edge detection cold detection signal disappears, the transport chain is stopped, and the unloading lifting chain is lowered. The lower limit signal is activated to complete the automatic unloading operation; (5) Automatic transportation of roller conveyor at the exit of the grinding table: According to the flaw detection signal sent by the third-level control system and the shearing signal sent by the second-level control system, the roller conveyor at the exit of the grinding table is controlled to transport the steel plate.

2. The automatic control method for a grinding station of a wide and thick plate finishing line according to claim 1 is characterized in that: In step (1), a cold detection device is provided on each set of rollers at the entrance of the grinding table, and the position of the steel plate is corrected by the material tracking position obtained by the cold detection device; The process of the steel plate splicing is carried out on the entrance roller of the grinding table or the entrance roller of the cooling bed. According to the arrangement position of the steel plates on the entrance roller, the control system transports the steel plates to the designated position of the entrance roller according to the calculation results. The specific steps of the steel plate splicing are as follows: According to the steel plate length data sent by the secondary control system, the length sum of the two adjacent steel plates is calculated; if the length sum is less than the set value and the thickness deviation of the two adjacent steel plates is less than 20mm, the paneling conditions are met; the primary control system sends a paneling control instruction to control the roller to complete the paneling; after the paneling is completed, the distance between the steel plates is greater than or equal to 0.5m.

3. The automatic control method for a grinding station of a wide and thick plate finishing line according to claim 1 is characterized in that: Step (2) is specifically as follows: when the conditions for automatic loading of the grinding table are met, the first-level control system sends a lifting signal for the loading lifting chain on the grinding table. After the loading lifting chain on the grinding table is lifted into place, the upper limit signal of the loading lifting chain is activated, and the transport chain is started to transport the steel plate to the set loading position on the grinding table; after the steel plate is in place, the first-level control system sends a lowering signal for the loading lifting chain on the grinding table, waits for the loading lifting chain on the grinding table to drop into place, activates the lower limit signal of the loading lifting chain, and the grinding and loading is completed.

4. The automatic control method for a grinding station of a wide and thick plate finishing line according to claim 3 is characterized in that: The automatic loading conditions of the grinding table include: the steel plate arrives at the position on the grinding table entrance roller and stops waiting for loading, the grinding table entrance roller and the grinding table loading and lifting chain cannot run at the same time, the encoder works normally, and the driver works normally.

5. The automatic control method for a grinding station in a wide and thick plate finishing line according to claim 1 is characterized in that: In step (3), adjacent chains of the grinding table body chain are staggered and connected; during the transportation of the grinding table, when the steel plate is transported through the adjacent chain joints, the two adjacent chains must run at the same time; When the gap between adjacent steel plates on the grinding table is too large, the plates will be automatically retracted and connected. When the distance between adjacent steel plates is greater than or equal to 0.5m and less than or equal to 1m, the connection is completed.

6. The automatic control method for a grinding station in a thick plate finishing line according to claim 1 is characterized in that: In step (3), a flip check box is provided in the operation screen of the first-level grinding station. After checking the box, the flip plate ID signal is sent to the first-level control system. When the flip condition is met, the flip machine is controlled to flip the plate according to the steel plate flip signal; the steel plate flip signal includes: the flip plate position signal, the adjacent steel plate position signal, the transport chain transport signal, the flip machine control signal, and the driving position signal; Among them, the flipping conditions include: the thickness of the flipping steel plate is less than or equal to 50mm; the flipping steel plate reaches the flipping machine's mechanical arm and is 0.5-0.2m away from the flipping machine's central axis; during the flipping process, the transport chain stops running; the steel plate adjacent to the flipping steel plate is greater than or equal to 0.5m away from the flipping machine; there is no crane directly above the flipping machine.

7. The automatic control method for a grinding station of a thick plate finishing line according to claim 1 is characterized in that: In step (3), when the steel plate needs to be lifted onto or off the grinding table by a crane, the specific method includes: The secondary control system sends a steel plate on / off-line request signal, and the grinding station operator confirms the signal; The crane operator locks the automatic control authority of the grinding table and uses the crane to lift the corresponding steel plate onto or off the grinding table; Automatically identify, create or revoke corresponding steel plate data through machine vision system; The steel plate ID and steel plate position coordinate information of the upstream / downline steel plates are changed, and temporary storage location data management of the intermediate warehouse is established in the secondary control system. The production report records of the upstream / downline steel plate data are automatically generated, and the updated steel plate data is sent to the downstream process.

8. The automatic control method for a grinding station in a thick plate finishing line according to claim 1 is characterized in that: Step (4) specifically includes: An upper limit switch and a lower limit switch are installed on the lifting chain of the grinding table, and the unloading steel plate is aligned on the side of the grinding table at the exit roller; When the automatic unloading conditions of the grinding table are met, the unloading lifting chain of the grinding table is lifted, and after the upper limit signal is activated, the unloading transport chain of the grinding table starts and transports the steel plate to the set position of the grinding table exit roller; When the steel plate reaches the edge of the exit roller, the edge detection cold inspection is activated and the transportation distance of the grinding table unloading transport chain begins to be accumulated. When the transportation distance of the transport chain is greater than or equal to the steel plate width in the steel plate tracking information and the edge detection cold inspection signal disappears, the grinding table unloading transport chain is stopped and the grinding table unloading lifting chain is lowered. When the grinding table unloading lifting chain is lowered into place, the lower limit signal is activated to complete the automatic unloading operation, and the steel plate is parked on the exit roller in the alignment position close to the grinding table side.

9. The automatic control method for a grinding table of a wide and thick plate finishing line according to claim 8, characterized in that: in, The automatic unloading conditions include: the grinding table outlet roller and the grinding table unloading lifting chain are not running at the same time, the steel plate arrives at the pre-unloading setting position of the grinding table, there is no steel plate on the grinding table outlet roller, the encoder works normally, and the driver works normally.

10. The automatic control method for a grinding table of a thick plate finishing line according to claim 1, characterized in that: In step (5), the exit roller of the grinding table is provided with an edge detection cold inspection, and the edge detection cold inspection interval is not greater than the minimum length of the steel plate to be inspected; the steel plate inspection signal is read from the three-level control system, and when the steel plate needs to be inspected, the exit roller of the grinding table is controlled to transport the inspection plate to the inspection device; for the steel plate that does not need to be inspected, it is directly transported to the head shear.

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