KR101363858B1 - Apparatus for manufacturing cold rolled steel sheet - Google Patents

Abstract

The present invention is a rolling process having a stand for applying pressure to the steel sheet and a thickness gauge for measuring the thickness of the cold rolled steel sheet passed through the stand; And a terminal for storing the thickness information of the cold rolled steel sheet transmitted from the thickness meter and providing the thickness information of the cold rolled steel sheet to a process in a subsequent process requiring thickness information of the cold rolled steel sheet.
According to the present invention, since the thickness information of the steel sheet to be used in the current process is provided in the previous process, the steel sheet thickness measurement and the thickness defect inspection in the current process can be eliminated, thereby saving the execution time of the current process.

Description

Cold rolled steel sheet manufacturing apparatus {Apparatus for manufacturing cold rolled steel sheet}

The present invention relates to a cold rolled steel sheet manufacturing apparatus for improving the production rate of cold rolled steel sheet.

A cold rolled sheet steel manufacturing apparatus performs a pickling process, a cold rolling process, a clean process, an annealing process, a temper rolling process, a correction process, etc., and manufactures a cold rolled steel sheet through these multiple processes.

When manufacturing a cold rolled steel sheet, it is very likely that defects caused by rust or mixing of foreign matters are very careful, unlike other processes.

Therefore, process shortening, sequencing, and direct connection technology are most important. The continuous and direct connection of the cold rolling process was promoted by the development of the continuous annealing process (CAL) for general cold rolled steel sheets, and it is now possible to technically make a cold rolling mill online that integrates the whole process from pickling to correction.

In addition, it is common to construct two processes, pickling and cold rolling mill (PCM) and continuous annealing line (CAL), in consideration of production efficiency and flexibility.

The cold rolling process which performs the cold rolling process in a cold rolled sheet steel manufacturing apparatus manufactures a cold rolled sheet steel of a target thickness by passing a hot rolled steel sheet between several rolls below the recrystallization temperature of a metal (room temperature), and applying a continuous force to a steel sheet. Appliance.

This cold rolling process consists of a plurality of rolling stands having an upper and lower work rolls, a backup roll for backing up the work rolls, and a roll force cylinder for controlling the roll gap of the upper and lower work rolls.

In the cold rolling process, when the hot rolled steel sheet produced in the hot rolling process is input, the hot rolled steel sheet is rolled in stages while the work is performed according to the setup schedule that is pressed and distributed by the stand under the control of AGC (Automatic Gauge Control) installed in each stand.

And the cold rolling process is to produce a cold rolled steel sheet having a target thickness from the leading end to the end by rolling to the target thickness in the final rolling stand of the plurality of rolling stands.

Here, the setup schedule is registered in the preset data set for each material of the steel sheet.

As described above, the cold rolled steel sheet manufacturing apparatus determines the thickness of the steel sheet in the cold rolling process, re-measures the thickness of the steel sheet in the annealing process and the correction process, which are subsequent processes of the cold rolling process, using a thickness gauge, and based on the measured thickness of the steel sheet. After determining the failure, the steel sheet with the thickness defect is removed and then the final steel sheet is produced.

Here, in the subsequent process of the cold rolling process, the thickness defect was remeasured by the thickness gauge and the defect was removed, which became a major cause of lowering the production rate of the steel sheet.

In addition, since the PC for monitoring the process is located at the exit of the process, the distance between the position of the process and the position of the process is too long, so that the thickness of the steel sheet in the process and the precision analysis work are inconvenient. There was.

The present invention provides a cold rolled steel sheet manufacturing apparatus for making a database of the thickness information of the cold rolled steel sheet measured at the time of the rolling process and providing the thickness of the databased cold rolled steel sheet to a subsequent process.

The present invention provides a cold rolled steel sheet manufacturing apparatus for outputting the thickness information of the cold rolled steel sheet measured during the rolling process to the monitoring program of the subsequent process using the thickness information of the steel sheet measured during the rolling process.

The present invention provides a cold rolled steel sheet manufacturing apparatus that automatically outputs whether the thickness of the cold rolled steel sheet inserted into the reel before the subsequent process of the rolling process automatically.

An apparatus for manufacturing a cold rolled steel sheet according to an aspect of the present invention includes a rolling process machine having a stand for applying pressure to the steel sheet and a thickness gauge for measuring the thickness of the cold rolled steel sheet passing through the stand; And a terminal for storing the thickness information of the cold rolled steel sheet transmitted from the thickness meter and providing the thickness information of the cold rolled steel sheet to a process in a subsequent process requiring thickness information of the cold rolled steel sheet.

The process machine of a subsequent process is any one of a continuous annealing process machine, a recoiling process machine, and an ultra-thin rolling process machine.

The ultra-thin rolling process performs the ultra-thin rolling process based on the thickness information of the steel sheet provided by the rolling process, detects and stores the thickness of the ultra-thin steel sheet manufactured in the ultra-thin rolling process, and stores the thickness of the ultra-thin steel sheet stored Information is provided to the process later in the process.

The subsequent process unit includes a monitor that outputs the thickness information of the steel sheet through its process monitoring program.

The terminal compares the measured thickness and the reference thickness of the cold rolled steel sheet to determine a thickness defect of the cold rolled steel sheet and outputs whether the cold rolled steel sheet is inferior in thickness.

The present invention can reduce the time to re-measure the thickness of the steel sheet in the subsequent process by storing the thickness information of the steel sheet during the rolling process, and providing the thickness information of the steel sheet stored in the subsequent process. In other words, by providing the thickness information of the cold rolled steel sheet measured in the previous process at the time of the current process operation or the operator's desired time, it is possible to eliminate the time spent on re-measurement of the thickness in the current process and time to check whether the cold rolled steel sheet is defective. The production speed in the process can be improved.

In addition, by checking the thickness defect of the cold rolled steel sheet before the current process progress, it is possible to remove the cold rolled steel sheet of the poor thickness before the current process progress, thereby improving the quality of the final steel sheet.

In addition, by outputting the thickness information of the cold rolled steel sheet of the previous process to the existing monitoring program of the current process, it is possible to reduce the production cost of the program and improve the operator's convenience.

In addition, it is possible to easily adjust the position and size of the thickness information output screen of the cold rolled steel sheet by changing the set value of the monitoring program.

1 is a block diagram of a cold rolled steel sheet manufacturing apparatus according to an embodiment of the present invention.
2 is a detailed configuration diagram of a pickling rolling process provided in the cold rolled steel sheet manufacturing apparatus according to an embodiment of the present invention.
3 is a detailed configuration diagram of the first terminal provided in the cold rolled steel sheet manufacturing apparatus according to an embodiment of the present invention.
Figure 4a is a detailed configuration of the first continuous annealing process provided in the cold rolled steel sheet manufacturing apparatus according to an embodiment of the present invention.
Figure 4b is an exemplary view of the exit thickness monitoring program display of the cold rolled steel sheet manufacturing apparatus according to an embodiment of the present invention.
Figure 5a is a detailed configuration of the second continuous annealing process provided in the cold rolled steel sheet manufacturing apparatus according to an embodiment of the present invention.
5B is a view illustrating a shape monitoring program display of a cold rolled steel sheet manufacturing apparatus according to an exemplary embodiment of the present invention.
Figure 5c is a detailed illustration of the thickness monitoring program of the cold rolled steel sheet manufacturing apparatus according to an embodiment of the present invention.
6 is a detailed configuration diagram of the recoiling process provided in the cold rolled steel sheet manufacturing apparatus according to an embodiment of the present invention.
7 is a detailed configuration diagram of the ultra-thin rolling process and preparatory process provided in the cold rolled steel sheet manufacturing apparatus according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of a cold rolled steel sheet manufacturing apparatus according to an embodiment, pickling rolling process (100: PCM), first, second continuous annealing process (200, 300: CAL), recoiling process (400: RCL) , Ultra-thin rolling process 500 (DRM) and preparatory process 600 (CPL). Such a cold rolled sheet steel manufacturing apparatus is demonstrated with reference to FIGS.

Pickling & Cold Rolling Mill (PCM) 100 performs a pickling process for dissolving and removing an oxide film on the surface of a steel sheet with an acid and a rolling process for manufacturing the steel sheet to a target thickness. Here, the pickling rolling process 100 may use a rolling process that performs only a rolling process.

As shown in Figure 2, the pickling rolling process 100 is a first reel (POR: Pay Off Reel, 110) for supplying a steel sheet (s) after the hot rolling process, and a cold rolled steel sheet manufactured to a target thickness at room temperature And a plurality of stands (131 to 135) for applying pressure to a steel sheet to be manufactured by being disposed between the second reel (TR) 120 wound around the first reel 110 and the second reel 120, and , A plurality of thickness meters (141 to 146) for measuring the thickness of the steel sheet supplied from the first reel 110 and the steel sheet passed through each stand (131 to 135), respectively, and an edge drop meter for measuring the edge drop of the steel sheet (EDG, 150).

Here, the plurality of stands 131 to 135 are provided between the upper and lower work rolls provided between the gaps through which the steel sheets pass and apply pressure to the steel sheets passed therethrough, and the backup rolls disposed adjacent to the work rolls to back up the work rolls. And a roll force cylinder (not shown) for controlling the gap between the upper and lower work rolls, and the plurality of stands 131 to 135 roll the steel plate step by step while working in accordance with the set-up schedule distributed under pressure. The final rolled steel sheet here has a target thickness.

The plurality of thickness meters 141 to 146 transmit the measured thickness information of the steel sheet to the thickness information processor 160.

Here, the thickness information processor 160 changes the thickness information of the steel sheets transmitted from the plurality of thickness meters 141 to 146 into an analog voltage signal or a digital signal, and transmits the changed signal to the first terminal 170. In this case, the thickness information processor 160 transmits target thickness information, which is thickness information of the final thickness meter 146.

The thickness information processor 160 determines a failure of the steel sheet based on the thickness information of the steel sheets transmitted from the plurality of thickness meters 141 to 146, and displays whether the thickness is defective.

The first terminal 170 stores the identification code of the steel sheet and the thickness information of the steel sheet as a database, and requests the thickness information when a request signal for providing the thickness information of the steel sheet is received from a process of a subsequent process requiring the thickness information of the steel sheet. Provide thickness information of the steel sheet to the process. Here, the identification code of the steel sheet is given by the user at the time of rolling.

The first terminal 170 may determine the thickness defect of the steel sheet based on the thickness information of the steel sheet, and display whether the thickness of the steel sheet is poor. Here, the thickness information of the steel sheet for determining the thickness defect of the steel sheet is the thickness deviation between the measured thickness and the reference thickness.

More specifically, as shown in FIG. 3, the first terminal 170 inputs an identification code and thickness information when an identification code of a steel sheet is input through an input unit 171 and an input unit 171 that receive a user's command. If the control unit 173 controls the storage unit 173 so that the thickness information transmitted from the processor 160 is stored in the storage unit 173, and the steel sheet thickness measurement result output is input through the input unit 171, the identification code and the thickness information of the steel plate are displayed in the display unit ( The controller 172 controls the display unit 174 to be displayed on the screen 174.

When the request signal is received from the communication unit 175, the control unit 172 analyzes the request signal to recognize the identification code of the steel sheet, retrieves the thickness information corresponding to the recognized identification code, and retrieves the thickness information detected by the monitor that transmits the request signal. Send it.

The storage unit 173 stores the identification code and the thickness information of the steel sheet.

The display unit 174 displays the identification code and thickness information of the steel sheet.

The communication unit 175 performs bidirectional communication with the plurality of monitors 270, 370, and 460.

That is, the communicator 175 receives the thickness information providing request signal from at least one of the plurality of monitors 270, 370, and 460 and cold-rolls to the monitor that transmits the request signal according to the command of the controller 172. The thickness information of the steel sheet is transmitted.

The pickling rolling process 100 includes a first process of controlling driving of the first and second reels 110 and 120, the plurality of stands 131 to 135, the plurality of thickness meters 141 to 146, and the edge drop system 150. It further includes a controller (PLC) 180.

The first process controller PLC 180 determines the rolling schedule in consideration of the gap between the work rolls, the rotation speed of the first and second reels, the rotation speed of each stand, the thickness and shape of the steel sheet, and the like.

Here, the rolling schedule determines how to appropriately distribute the reduction ratio of cold rolling for each stand.

That is, the first process controller PLC 180 controls the driving of the roll force cylinder according to the target thickness to adjust the gap between the upper and lower work rolls and the reduction ratio of the reduction stand.

In addition, the first process controller PLC 180 may receive the identification code of the steel sheet and search the rolling schedule corresponding to the input identification code to determine the rolling schedule.

Here, the first process controller 180 may be provided integrally with the thickness information processor 160.

The first and second continuous annealing processes (200, 300) is a device that combines the heat treatment, temper rolling and correction test functions in electrolytic cleaning, it is possible to obtain a steel sheet of uniform material by continuous processing in a strip state.

The first and second continuous annealing processes (200, 300) is a steel sheet is deformed from the deformed structure when the deformed crystal structure is heated by heating the crystal structure deformed to 600 to 800 ℃ for a certain period of time. This recrystallization phenomenon lowers the hardness of the steel sheet and improves workability.

As shown in Figure 4a, the first continuous annealing process 200 is a first reel (POR: Pay Off Reel, 210-1, supplying a cold rolled steel sheet (s) manufactured in the pickling rolling process 100) 210-2), a second reel (TR: 220-1, 220-2) to which the steel sheet subjected to the continuous annealing process is wound, a plurality of bending rolls to assist the movement of the steel sheet, and a first reel Shape measuring machine 230 for measuring the shape of the steel sheet supplied from (210-1, 210-2), respectively, and a plurality of bending rolls are installed to allow the steel sheet to pass through from the start of recrystallization until completion of recrystallization A continuous annealing furnace (A) for supplying heat to the steel sheet moved through the bending roll, a pinhole detector (240) for detecting holes in the steel sheet passing through the continuous annealing furnace, and a thickness of the steel sheet provided at the exit side and passing through the pinhole detector Thickness gauge 250 for measuring the thickness, and edge drop gauge (EDG, 260) for measuring the edge drop of the steel sheet, a width gauge for measuring the width of the steel sheet It is also possible to further include.

The thickness meter 250 of the first continuous annealing process measures the thickness of the steel sheet and provides it to the first monitor 270.

Here, the thickness of the steel sheet measured through the thickness meter 250 is the thickness of the exit steel sheet of the continuous annealing process, and is the thickness of the steel sheet changed by the continuous annealing process.

The first monitor 270 includes an input unit 271, a control unit 272, and a display unit 273.

The input unit 271 of the first monitor 270 receives the execution command of the monitoring program and the identification code of the steel plate, and the control unit 272 controls the execution of the monitoring program when the execution command of the monitoring program is input, When the identification code is input, the thickness information of the steel sheet is requested to the first terminal 170, and when the thickness information of the steel sheet is transmitted from the first terminal 170, the thickness information of the steel sheet is displayed on a running monitoring program.

The display unit 273 of the first monitor 270 displays a monitoring program and also displays thickness information of the steel sheet in the monitoring program.

The control unit 272 of the first monitor 270 receives the thickness information of the steel sheet subjected to the continuous annealing process transmitted from the thickness meter 250 provided on the exit side of the first continuous annealing process 200, and received the steel sheet To store the thickness information. At this time, the first monitor 270 also stores the identification code of the steel sheet.

The control unit 272 of the first monitor 270 is the shape of the steel sheet measured by the shape measuring unit 230, the hole detected through the pinhole detector 240, the amount of edge drop measured through the edge drop meter 260 The width of the steel sheet measured by the gauge is monitored. The first monitor 270 is provided with a program for outputting the monitoring result of each data during the continuous annealing process.

As shown in FIG. 4B, the thickness information D1 of the steel sheet transmitted from the first terminal 170 is output through the exit thickness monitoring program of the first monitor 270.

Here, the thickness information of the steel plate transmitted from the first terminal 170 corresponds to the thickness information of the entry steel sheet of the continuous annealing process.

Therefore, since the thickness information of the steel sheet to be drawn in from the first terminal 170 is provided, the second continuous annealing process 200 does not have to measure the thickness of the steel sheet on the side, and the steel sheet that has undergone the thickness defect inspection is introduced. It is not necessary to perform the thickness defect inspection, thereby reducing the continuous annealing process time.

In addition, it is possible to reduce the number of thickness meters installed in the second continuous annealing process 200, it is possible to reduce the manufacturing cost of the process equipment.

In addition, by outputting the thickness information of the cold rolled steel sheet of the previous process to the existing monitoring program of the process, it is possible to reduce the cost of program production, and to improve the operator's convenience.

The first continuous annealing process 200 is the first, second reel (210-1, 210-2, 220-1, 220-2), according to the command of the second process controller (SCC: Supervisory Control Computer, 280), A bending roll, a continuous annealing furnace A, a shape measuring device 230, a pinhole detector 240, a thickness meter 250, an edge drop system 260, and the like are driven.

The second process controller SCC 280 requests the first terminal 170 to provide thickness information of the steel sheet corresponding to the input identification code of the steel sheet.

Here, the identification code of the steel sheet may be input through the first monitor 270, and when the identification code of the steel sheet is input, the first monitor 270 requests the thickness information of the steel sheet from the first terminal 170. It is also possible.

As shown in FIG. 5A, the second continuous annealing process unit 300 may include a first reel (POR: Pay Off Reel, 310-1), which supplies a cold rolled steel sheet s manufactured in the pickling rolling process 100. 310-2), a second reel (TR: 320-1, 320-2) to which the steel sheet subjected to the continuous annealing process is wound, a plurality of bending rolls to assist the movement of the steel sheet, and before the start of recrystallization A plurality of bending rolls are installed to allow the steel sheet to pass through until the recrystallization is completed, and the continuous annealing furnace (A) for supplying heat to the steel sheet moved through the plurality of bending rolls and the continuous annealing furnace (A) A pinhole detector 330 for detecting holes in the steel sheet, a shape measuring instrument 340 for measuring the shape of the steel sheet passing through the continuous annealing furnace A, and a thickness for measuring the thickness of the steel sheet provided on the exit side and passing through the pinhole detector It includes a system 350 and an edge drop system (EDG, 360) for measuring the edge drop of the steel sheet, and further includes a width gauge for measuring the width of the steel sheet It is also possible.

The thickness meter 350 of the second continuous annealing process measures the thickness of the steel sheet and provides it to the second monitor 370.

Here, the thickness of the steel sheet measured through the thickness meter 370 is the thickness of the exit steel sheet of the second continuous annealing process 300, and is the thickness of the steel sheet changed by the continuous annealing process.

The second monitor 370 includes an input unit 371, a control unit 372, and a display unit 373.

The input unit 371 of the second monitor 370 receives the execution command of the monitoring program and the identification code of the steel plate, and the control unit 372 controls the execution of the monitoring program when the execution command of the monitoring program is input, When the identification code is input, the thickness information of the steel sheet is requested to the first terminal 170, and when the thickness information of the steel sheet is transmitted from the first terminal 170, the thickness information of the steel sheet is displayed on a running monitoring program.

In addition, the second monitor 370 checks the database state of the first terminal 170, and if the database of the first terminal 170 is stable, requests the first terminal 170 to provide thickness information of the steel sheet.

The display unit 373 of the second monitor 370 displays a monitoring program and also displays thickness information of the steel sheet in the monitoring program.

The second monitor 370 receives the thickness information of the steel sheet subjected to the continuous annealing process transmitted from the thickness meter 350 provided at the exit side of the second continuous annealing process, and stores the received thickness information of the steel sheet. At this time, the second monitor 370 also stores the identification code of the steel sheet.

The control unit 371 of the second monitor 370 is the shape of the steel sheet measured by the shape measuring unit 340, the hole detected through the pinhole detector 330, the amount of edge drop measured through the edge drop meter 360 In addition, a program has been established to monitor the measured width through a pyrometer and to monitor each data during the continuous annealing process.

As shown in FIG. 5B, the thickness information D2 of the steel sheet transmitted from the first terminal 170 is output through the shape monitoring program of the second monitor 370.

Here, the thickness information of the steel sheet transmitted from the first terminal 170 corresponds to the thickness information of the entry steel sheet of the second continuous annealing process 300.

Therefore, the second continuous annealing process 300, because the thickness information of the steel sheet to be drawn from the first terminal 170 is provided, it is not necessary to measure the thickness of the side steel sheet, and because the steel sheet that has completed the thickness defect inspection is introduced separately It is not necessary to perform the thickness defect inspection, thereby reducing the continuous annealing process time.

In addition, it is possible to reduce the number of thickness meters installed in the second continuous annealing process 300, it is possible to reduce the manufacturing cost of the process equipment.

In addition, since the thickness defect is checked before the continuous annealing process, there is no inconvenience in placing the second monitor 360 on the exit side of the continuous annealing process.

5C is a window showing the steel sheet thickness information D1 in the monitoring program of the present process, and shows the thickness variation for each length of the steel sheet measured in the previous process.

The thickness variation window for each length of the steel sheet measured in the pickling rolling process, which is the previous process, is a check box (S1) for adjusting the size of the window, and a setting window for setting the position of the thickness variation window for each length of the steel sheet. S2), the search button (S3) for searching the steel plate using the identification code, the end button (S4) for selecting the end of the thickness deviation window for each length of the steel plate, DB display window for displaying the normal state of the terminal, the thickness database of the previous process (S5), a status display window S6 for displaying the normal state of the present monitoring program, a communication window S7 for displaying a communication state with the process controller of the present process, and the like.

By changing the setting value of the monitoring program in this way, the position and size of the thickness information output screen of the cold rolled steel sheet can be easily adjusted.

The second continuous annealing process is performed by a third process controller (SCC: Supervisory Control Computer (not shown)) according to a command of the first and second reels 310-1, 310-2, 320-1, 320-2, a bending roll, The continuous annealing furnace A, the shape measuring device 340, the pinhole detector 330, the edge drop meter 360, the thickness meter 350, and the like are driven.

The third process controller SCC may also request the first terminal 170 to provide thickness information of the steel sheet corresponding to the input identification code of the steel sheet.

Recoiling process (RCL: 400) is a process of dividing a coil with an appropriate weight to meet the demand after oiling antirust oil to prevent rust on the surface of cold rolled coil after rough rolling. Perform final inspection.

As shown in FIG. 6, the recoiling process 400 includes a first reel (POR: Pay Off Reel, 410) for supplying a cold rolled steel sheet s manufactured in the pickling rolling process 100, and continuous annealing. A second reel (TR) 420 on which the steel sheet is wound, a pinch roll that pulls the upper portion of the steel sheet, a pinhole detector 430 that detects holes in the steel sheet, and And a width gauge 440 for measuring the width of the steel plate, and a half-measurement meter 450 for measuring the bending (that is, half-curvature) of the steel sheet.

Here, the recoiling process 400 further includes a fourth process controller (PLC, not shown) for controlling driving of the first, second reels, pinch rolls, pinhole detectors, width gauges, and the half-measurement meter.

The half-curve measuring unit 450 of the recoiling process 400 transmits the half-curve information of the steel sheet to the third monitor 460.

The third monitor 460 includes an input unit 461, a controller 462, and a display unit 463.

The input unit 461 of the third monitor 460 receives the execution command of the monitoring program and the identification code of the steel plate, and the control unit 462 controls the execution of the monitoring program when the execution command of the monitoring program is input, When the identification code is input, the thickness information of the steel sheet is requested to the first terminal 170, and when the thickness information of the steel sheet is transmitted from the first terminal 170, the thickness information of the steel sheet is displayed on a running monitoring program.

The display unit 463 of the third monitor 460 displays a half-curve monitoring program and also displays thickness information of the steel sheet in the monitoring program.

The third monitor 460 checks the database state of the first terminal 170, and if the database of the first terminal 170 is stable, requests the first terminal 170 to provide thickness information of the steel sheet.

In addition, the third monitor 460 may output the hole detected through the pinhole detector 430 and the width measured through the width meter 440 through a monitoring program.

The ultra-thin rolling mill (DRM) (500) is cold rolled in a pickling rolling mill to further heat-treat the steel sheet to produce a thinner and higher strength steel sheet than the conventional cold rolled steel sheet.

As shown in FIG. 7, the ultra-thin rolling process 500 includes a first reel (POR: Pay Off Reel, 510) for supplying a heat-treated steel sheet s and a cold rolled steel sheet manufactured to a target thickness at room temperature. Winding second reel (TR) 520, a plurality of stands (531, 532) is applied between the first reel and the second reel to apply pressure to the steel sheet to be manufactured, and supplied from the first reel A plurality of thickness meters 541 and 542 for measuring the thickness of the steel sheet and the thickness of the steel sheet passing through the respective stands 531 and 532 are included.

Here, a plurality of stands (531, 532) is provided between the gap between the steel plate passes through the upper and lower work rolls to apply pressure to the steel sheet when passing through the steel sheet, the backup roll disposed adjacent to each work roll to back up each work roll, And a roll force cylinder (not shown) for controlling the gap between the upper and lower work rolls, and the plurality of stands roll the steel plate step by step while working according to the press-distributed setup schedule. The final rolled steel sheet here has a target thickness.

The plurality of thickness meters 541 and 542 transmit the measured thickness information of the steel sheet to the thickness information processor 550.

Here, the ultra-thin rolling process 500 further includes a first process controller (PLC) 180 for controlling driving of the first, second reels, the plurality of stands, the plurality of thickness meters, and the edge drop system.

The fifth process controller (PLC, not shown) determines the rolling schedule in consideration of the gap between the work rolls, the rotational speed of the first and second reels, the rotational speed of each stand, the thickness and shape of the steel sheet, and the like.

That is, the fifth process controller PLC controls the driving of the roll force cylinder according to the target thickness to adjust the gap between the upper and lower work rolls and the reduction ratio of the reduction stand.

In addition, the fifth process controller PLC may receive the identification code of the steel sheet and search the rolling schedule corresponding to the input identification code to determine the rolling schedule.

Here, the thickness information processor 550 changes the thickness information of the steel sheets transmitted from the plurality of thickness meters 541 and 542 into an analog voltage signal or a digital signal, and transmits the changed signal to the second terminal 560. In this case, the thickness information processor 550 transmits target thickness information, which is thickness information of the final thickness meter 542.

The thickness information processor 550 determines the failure of the steel sheet based on the thickness information of the steel sheets transmitted from the plurality of thickness meters 541 and 542, and displays whether the thickness is defective.

The second terminal 560 stores the identification code of the steel sheet and the thickness information of the steel sheet as a database and stores the database, and when the thickness information providing request signal of the steel sheet is received from the monitor 640 of another process, the monitor of the process requesting the thickness information. 640 provides the thickness information of the steel sheet.

The second terminal 560 may determine the thickness defect of the steel sheet based on the thickness information of the steel sheet, and display whether the thickness of the steel sheet is poor. Here, the thickness information of the steel sheet for determining the thickness defect of the steel sheet is the amount of thickness deviation from the reference thickness.

Here, the second terminal 560 is the same as the configuration of the first terminal 170 and a detailed description thereof will be omitted.

Coil Preparation Line (CPL) 600 corrects the steel sheet to enable the use of the ultra-thin steel sheet rolled in the ultra-thin rolling process 500.

This preparation process is a first reel (POR: Pay Off Reel, 610) for supplying the ultra-thin steel sheet (s) rolled in the ultra-thin rolling process 500, and a second reel (TR :) cold rolled steel sheet Tension Reel 620 and a width gauge 630 for measuring the width of the steel sheet.

The preparation process 630 transmits the width gauge to the fourth monitor 640, the fourth monitor 640 is ultra-thin steel sheet rolled in the ultra-thin rolling process 500 through the width monitoring program of the steel sheet Output thickness information.

In addition, the process controller for controlling the operation of each process unit may be integrated into one.

100: pickling rolling process 200: first continuous annealing process
300: second continuous annealing process 400: recoiling process
500: ultra-thin rolling process 600: preparation process

Claims (5)

A rolling process machine having a stand for applying pressure to the steel plate and a thickness meter for measuring the thickness according to the identification code of the cold rolled steel sheet passing through the stand;
It stores the thickness information according to the identification code of the cold rolled steel sheet transmitted from the thickness meter, and provides the thickness information according to the identification code of the cold rolled steel sheet to the process of the subsequent process is required thickness information according to the identification code of the cold rolled steel sheet Cold rolled steel sheet manufacturing apparatus comprising a terminal. According to claim 1, The process of the subsequent step,
Cold rolled steel sheet manufacturing apparatus which is a process machine of any one of a continuous annealing process machine, a recoiling process machine, and an ultra-thin rolling process machine. The ultra-thin rolling process of claim 2,
The ultra-thin rolling process is performed based on the thickness information of the steel sheet provided by the rolling process, the thickness of the ultra-thin steel sheet manufactured in the ultra-thin rolling process is detected and stored, and the thickness information of the stored ultra-thin steel sheet is subsequently processed. Cold rolled steel sheet manufacturing apparatus provided to the process of the process. The process of claim 2, wherein the step of the subsequent step,
Cold rolled steel sheet manufacturing apparatus comprising a monitor for outputting the thickness information of the steel sheet through its process monitoring program. The method of claim 1, wherein the terminal,
Cold-rolled steel sheet manufacturing apparatus for comparing the measured thickness and the reference thickness of the cold-rolled steel sheet to determine the thickness of the cold-rolled steel sheet and output whether or not the cold-rolled steel sheet.

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