WO2022034654A1 - 圧延装置の制御装置及び圧延設備並びに圧延装置の運転方法 - Google Patents
圧延装置の制御装置及び圧延設備並びに圧延装置の運転方法 Download PDFInfo
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- WO2022034654A1 WO2022034654A1 PCT/JP2020/030695 JP2020030695W WO2022034654A1 WO 2022034654 A1 WO2022034654 A1 WO 2022034654A1 JP 2020030695 W JP2020030695 W JP 2020030695W WO 2022034654 A1 WO2022034654 A1 WO 2022034654A1
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- Prior art keywords
- rolling
- metal plate
- edge crack
- edge
- condition
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- 238000005096 rolling process Methods 0.000 title claims abstract description 525
- 238000000034 method Methods 0.000 title claims description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 153
- 239000002184 metal Substances 0.000 claims abstract description 153
- 238000001514 detection method Methods 0.000 claims abstract description 59
- 238000011144 upstream manufacturing Methods 0.000 claims description 32
- 230000005855 radiation Effects 0.000 claims description 31
- 238000004804 winding Methods 0.000 claims description 12
- 238000005336 cracking Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- 230000014509 gene expression Effects 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229910004613 CdTe Inorganic materials 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- MARUHZGHZWCEQU-UHFFFAOYSA-N 5-phenyl-2h-tetrazole Chemical compound C1=CC=CC=C1C1=NNN=N1 MARUHZGHZWCEQU-UHFFFAOYSA-N 0.000 description 1
- 238000003462 Bender reaction Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010731 rolling oil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/48—Tension control; Compression control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/02—Speed
- B21B2275/06—Product speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
- B21B27/106—Heating the rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
- B21B37/32—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by cooling, heating or lubricating the rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/38—Control of flatness or profile during rolling of strip, sheets or plates using roll bending
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/40—Control of flatness or profile during rolling of strip, sheets or plates using axial shifting of the rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/46—Roll speed or drive motor control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
Definitions
- This disclosure relates to a control device for a rolling apparatus, a rolling apparatus, and an operation method for the rolling apparatus.
- edge cracks may occur at the end of the metal plate in the plate width direction. Since the expansion of edge cracks may lead to plate breakage, it is necessary to properly detect edge cracks.
- Patent Document 1 discloses a method of detecting edge cracks in a steel sheet using an edge profile meter installed on the exit side of a rolling process line. This prevents plate breakage in a processing process (for example, continuous annealing process) downstream of the rolling process line.
- edge cracks may expand even during rolling of a metal plate, and the plate may be easily broken.
- the method described in Patent Document 1 only detects edge cracks in the rolling line, and therefore cannot suppress the expansion of edge cracks during rolling and the plate breakage caused by the expansion.
- At least one embodiment of the present invention aims to provide a control device and rolling equipment of a rolling apparatus capable of suppressing the expansion of edge cracks during rolling, and an operation method of the rolling apparatus.
- the control device for the rolling apparatus is A control device for a rolling apparatus equipped with at least one rolling stand for rolling a metal plate.
- a detection signal acquisition unit for receiving an edge crack detection signal at the edge in the plate width direction of the metal plate from the edge crack sensor, and a detection signal acquisition unit.
- a rolling condition determination unit for determining the rolling conditions of the rolling apparatus, Equipped with When the detection signal acquisition unit receives the edge crack detection signal, the rolling condition determining unit sets the rolling conditions of the rolling apparatus from the first rolling condition immediately before the edge crack is detected. It is configured to change to the second rolling condition that can suppress the expansion of the edge crack rather than the rolling condition.
- the rolling equipment is A rolling machine that includes at least one rolling stand for rolling metal plates, and An edge crack sensor configured to detect edge cracks at the end in the plate width direction of the metal plate during rolling with the rolling apparatus, and an edge crack sensor.
- the above-mentioned control device configured to control the rolling device based on the detection signal from the edge crack sensor, and the above-mentioned control device. To prepare for.
- the method of operating the rolling mill is as follows.
- a method of operating a rolling mill that includes at least one rolling stand.
- the step of rolling a metal plate with the rolling apparatus A step of detecting an edge crack at an end portion of the metal plate in the plate width direction during rolling with the rolling apparatus, and a step of detecting the edge crack.
- the rolling condition of the rolling apparatus can be changed from the first rolling condition immediately before the edge crack is detected to the expansion of the edge crack more than the first rolling condition. Steps to change to the second rolling conditions To prepare for.
- a control device and rolling equipment of a rolling apparatus capable of suppressing the expansion of edge cracks during rolling, and an operation method of the rolling apparatus.
- the rolling equipment 1 includes a rolling apparatus 2 configured to roll the metal plate S, an edge crack sensor 30 for detecting an edge crack of the metal plate S, and an edge crack.
- a control device 50 for controlling the rolling apparatus 2 based on a detection signal from the sensor 30 is provided.
- the rolling apparatus 2 includes at least one rolling stand 10 for rolling the metal plate S.
- the rolling apparatus 2 may include, for example, one rolling stand 10 as shown in FIG. 1, or may include a plurality of rolling stands 10 as shown in FIG. 2 or 3, for example.
- the rolling apparatus 2 includes two rolling stands 10 including rolling stands 10A and 10B.
- the rolling apparatus 2 includes four rolling stands 10 including rolling stands 10A to 10D.
- Each of the rolling stands 10 sandwiches a pair of rolling rolls (work rolls) 15 and 16 provided so as to sandwich the metal plate S which is a rolling material, and a pair of rolling rolls 15 and 16, respectively. It includes a pair of intermediate rolls 17, 18 and a pair of backup rolls 19, 20 provided on opposite sides, respectively. The intermediate rolls 17 and 18 and the backup rolls 19 and 20 are configured to support the rolling rolls 15 and 16. Further, the rolling stand 10 is provided with a reduction device 22 (22A to 22D) for applying a load to the pair of rolling rolls 15 and 16 to reduce the metal plate S.
- the reduction device 22 may include a hydraulic cylinder.
- Motors 11 are connected to the rolling rolls 15 and 16 via a spindle (not shown) or the like, and the rolling rolls 15 and 16 are rotationally driven by the motor 11.
- the rolling rolls 15 and 16 are rotated by a motor while the metal plate S is rolled by the rolling device 22, so that a frictional force is generated between the rolling rolls 15 and 16 and the metal plate S.
- the metal plate S is sent to the exit side of the rolling rolls 15 and 16 by the frictional force.
- the rolling apparatus 2 includes a winding machine 4 for winding the coil of the metal plate S toward the rolling stand 10 and a winding machine 14 for winding the metal plate S from the rolling stand 10.
- the unwinder 4 and the winder 14 are each driven by a motor (not shown).
- An entry-side pinch roll 6 for guiding the metal plate S introduced from the unwinding machine 4 to the rolling stand 10 may be provided between the rolling stand 10 and the unwinding machine 4.
- An exit side pinch roll 12 for guiding the metal plate S from the rolling stand 10 to the winder may be provided between the rolling stand 10 and the winder.
- the unwinding machine 4, the winding machine 14, the entry-side pinch roll 6 and the exit-side pinch roll 12 are not shown.
- the rolling apparatus 2 may be a rolling apparatus (reverse mill) in which a metal plate S passed between a pair of rolling rolls 15 and 16 is reciprocated to roll. That is, the rolling apparatus 2 as a reverse mill is configured to perform rolling of the metal plate S in a plurality of passes.
- a reverse mill in which a reverse mill is used, in the odd-numbered rolling (first pass, etc.), the metal plate S is unwound from the unwinding machine 4, and the metal plate S is wound by the winding machine 14 while rolling. Then, rolling is stopped just before the tail end of the metal plate S unwound from the unwinding machine 4, and the odd-numbered (first pass, etc.) rolling is completed with the metal plate S being pressed by the rolling rolls 15 and 16. .
- the rolling apparatus 2 shown in FIGS. 1 and 2 is a reverse mill.
- the rolling apparatus 2 may be configured to perform rolling while advancing the metal plate S passed between the pair of rolling rolls 15 and 16 in one direction.
- the rolling apparatus shown in FIG. 3 is a tandem type rolling apparatus configured to perform rolling while advancing the metal plate S in one direction.
- the edge crack sensor 30 is configured to detect an edge crack at an end portion (hereinafter, simply referred to as an end portion) of the metal plate S in the plate width direction (direction substantially orthogonal to the traveling direction).
- the edge crack sensor 30 sends a detection signal (a signal indicating the presence or absence of edge crack) to the control device 50.
- FIG. 4 is a diagram schematically showing an edge crack (hatched portion in FIG. 4) that occurs in the metal plate S.
- the edge crack 90 is a defect that occurs at the end of the metal plate S in the width direction.
- the edge crack 90 usually has a shape recessed inward in the plate width direction from the plate edge E of the metal plate S.
- the edge crack sensor 30 is provided on the downstream side of any one of the rolling stands 10 in the traveling direction of the metal plate S.
- the rolling stand 10 located on the most upstream side (rolling stands 10A in FIGS. 2 and 3) ) Is provided with an edge crack sensor 30 on the downstream side.
- the rolling stand 10 (rolling stand 10 in FIG. 1, rolling stand 10A in FIGS. 2 and 3) located on the upstream side of the edge crack sensor 30 is the upstream stand 7.
- the edge crack sensor 30 is provided between the pair of rolling stands 10 in the traveling direction of the metal plate S.
- an edge crack sensor 30 is provided between the rolling stand 10A located on the most upstream side in the traveling direction of the metal plate S and the rolling stand 10B adjacent to the rolling stand 10A.
- the rolling stand 10 located on the downstream side of the edge crack sensor 30 is the downstream stand 9.
- edge crack sensor 30 may be provided on the upstream side of any of the rolling stands 10 in the traveling direction of the metal plate S. Further, in some embodiments, a plurality of edge crack sensors 30 may be provided for the rolling apparatus 2.
- another edge crack sensor 30 may be provided on the upstream side of the rolling stand 10.
- the edge crack sensor 30 may be provided on the upstream side of the rolling stand 10A and / or on the downstream side of the rolling stand 10B.
- an edge crack sensor 30 may be provided between the rolling stand 10B and / or between the rolling stand 10C and the rolling stand 10D.
- the edge crack sensor 30 is configured to detect edge cracks using radiation (X-rays, etc.).
- the edge crack sensor 30 has a radiation generating unit 32 configured to generate radiation toward the end portion of the metal plate S in the plate width direction, and the metal plate S.
- a radiation detection unit 34 which is provided on the side opposite to the radiation generation unit 32 and is configured to receive radiation from the radiation generation unit 32.
- the edge crack sensor 30 is configured to detect edge cracks based on a range in the plate width direction in which the radiation detection unit 34 receives radiation.
- the radiation detection unit 34 includes a semiconductor element that outputs a signal when receiving radiation.
- the semiconductor element can be easily miniaturized, the edge crack sensor 30 can be miniaturized as compared with, for example, a radiation detector having a gas chamber as a component, and the edge crack is relatively small. Can also be detected.
- the above-mentioned semiconductor element may be a CdTe (cadmium telluride) -based semiconductor element. Since the CdTe-based semiconductor element has high resolution, it is easy to properly detect even a relatively small edge crack.
- CdTe cadmium telluride
- FIG. 5 is a schematic configuration diagram of the control device 50 according to the embodiment.
- the control device 50 is configured to receive a detection signal from the edge crack sensor 30 and control the operation of the rolling device 2 based on the detection signal.
- the control device 50 includes a detection signal acquisition unit 52, a rolling condition determination unit 54, and a control unit 56.
- the control device 50 includes a processor (CPU, etc.), a storage device (memory device; RAM, etc.), an auxiliary storage unit, an interface, and the like.
- the control device 50 receives a detection signal from the edge crack sensor 30 via the interface.
- the processor is configured to process the signal thus received.
- the processor is configured to process the program deployed in the storage device.
- the processing content in the control device 50 is implemented as a program executed by the processor.
- the program may be stored in the auxiliary storage unit. When the programs are executed, these programs are expanded in the storage device.
- the processor reads the program from the storage device and executes the instructions contained in the program.
- the detection signal acquisition unit 52 is configured to receive a detection signal (a signal indicating the presence or absence of edge cracking) from the edge cracking sensor 30.
- the rolling condition determination unit 54 is configured to determine the rolling conditions of the rolling apparatus 2 based on the detection signal received by the detection signal acquisition unit 52.
- the rolling condition may include the traveling speed of the metal plate S or the tension of the metal plate S.
- the control unit 56 is configured to control the operation of the rolling apparatus 2 so that the rolling conditions determined by the rolling condition determination unit 54 are realized.
- the control unit 56 includes motors 11 (11A to 11D) and roll benders 23 (23A to 23D) (FIGS. 1 to 23D) provided corresponding to the rolling stands 10 (10A to 10D) so that the above-mentioned rolling conditions are realized. It may be configured to control the operation of the heater 24 (24A to 24D) or the shift cylinder 26 (26A to 26D) (not shown in FIGS. 1 to 3) (not shown in FIG. 3).
- the roll bender 23 is configured to bend and deform the rolling rolls 15 and 16 by pushing the axial ends of the rolling rolls 15 and 16 in the vertical direction. When the rolling rolls 15 and 16 are deformed in this way to compress the end portion of the metal plate S being rolled, the material is stretched and the tension at the end portion of the metal plate S is reduced.
- the roll bender 23 may include a hydraulic cylinder capable of pushing the ends of the rolling rolls 15 and 16 in the vertical direction.
- the heater 24 is configured to heat the end of the metal plate S being rolled. When the end portion of the metal plate S is heated in this way, the temperature of the end portion of the metal plate S rises, the material stretches, and the tension at the end portion of the metal plate S decreases.
- the heater 24 may be provided in the vicinity of the end portion of the metal plate S and may be configured to heat the end portion of the metal plate S. Alternatively, the heater 24 is provided in the vicinity of the ends of the rolling rolls 15 and 16, and by heating the ends of the rolling rolls 15 and 16, the end of the metal plate S rolled by the rolling rolls 15 and 16 is formed. It may be configured to heat indirectly.
- the heater 24 may be configured to heat the end of the metal plate S using an electromagnetic induction coil, a heat medium, or a laser beam.
- the shift cylinder 26 is configured to shift the rolling rolls 15 and 16 in the axial direction.
- the rolling rolls 15 and 16 have a tapered portion having a shape that tapers toward the axial end at the axial end.
- the shift cylinder 26 may include a hydraulic cylinder capable of moving the rolling rolls 15 and 16 in the axial direction.
- FIG. 6 is a flowchart of an operation method of the rolling mill according to the embodiment.
- the rolling apparatus 2 is operated under the first rolling condition to roll the metal plate S (S100).
- the speed (traveling speed) of the metal plate S in the traveling direction and the tension at the end of the metal plate S are each within predetermined ranges. That is, in step S100, the rolling condition determination unit 54 sets the rolling condition of the rolling apparatus 2 to the first rolling condition, and the control unit 56 sets the rolling condition of the first rolling condition (the speed of the metal plate S and the tension of the end portion).
- the operation of the motor 11 and the like of the rolling apparatus 2 is controlled so that the operation of the rolling mill 2 can be realized.
- the edge crack sensor 30 is used to detect the edge crack of the metal plate S (S200).
- step S200 as shown in FIGS. 1 to 3, the rolling stand 10 (rolling stand 10 in FIG. 1, rolling stand 10A in FIGS. 2 and 3; that is, the upstream stand 7) is provided on the downstream side. Edge cracking may be detected using the edge cracking sensor 30. In this case, since the edge cracks that have expanded to some extent by passing through the upstream stand 7 are detected, the edge cracks can be detected more reliably.
- the operation under the first rolling condition (S100) is continued.
- the edge crack is detected in step S200 (that is, when the detection signal acquisition unit 52 receives the detection signal; Yes in S200)
- the operating condition of the rolling apparatus 2 can be changed from the first rolling condition to suppress the expansion of the edge crack.
- the second rolling condition is changed (S300).
- step S300 the rolling condition determination unit 54 sets the rolling condition of the rolling apparatus 2 to the second rolling condition. Then, the control unit 56 controls the operation of the rolling apparatus 2 so that the operation under the second rolling condition (the speed of the metal plate S and the tension of the end portion) is realized. In this way, when the edge crack at the end of the metal plate S in the plate width direction is detected, the rolling condition of the rolling apparatus 2 is changed to a rolling condition (second rolling condition) capable of suppressing the expansion of the edge crack. Therefore, it is possible to suppress the expansion of edge cracks during rolling and the plate breakage caused by the expansion.
- second rolling condition a rolling condition capable of suppressing the expansion of the edge crack. Therefore, it is possible to suppress the expansion of edge cracks during rolling and the plate breakage caused by the expansion.
- the tension at the end of the metal plate S becomes the tension at the end of the metal plate S under the first rolling condition (in step S100).
- the rolling apparatus 2 is controlled so as to be smaller than the tension).
- the control unit 56 operates the roll bender 23, the heater 24, or the shift cylinder 26 provided corresponding to the rolling stand 10 so as to obtain a desired tension.
- step S300 by reducing the tension at the end portion of the metal plate S in the plate width direction as compared with the operation under the first rolling condition, the expansion of edge cracks during rolling is effectively suppressed. Can be done.
- the advancing speed of the metal plate is the advancing speed of the metal plate S under the first rolling condition (advancing speed in step S100).
- the rolling apparatus 2 is controlled so as to be smaller than the above.
- the control unit 56 controls the motor 11 of the rolling stand 10 so as to achieve a desired traveling speed. In this way, in step S300, by reducing the traveling speed of the metal plate S as compared with the operation under the first rolling condition, if plate breakage due to edge cracking occurs during rolling. However, it is possible to reduce damage to surrounding devices and the like.
- the edge cracked portion is wound by the winder 14 (S400).
- the fact that the edge cracked portion is wound by the winder 14 means that the edge cracked portion is wound once by the winder 14.
- the position of the edge cracked portion may be calculated, and based on this calculation result, it may be determined whether or not the edge cracked portion is wound by the winder 14.
- the position of the edge crack portion is, for example, the length of time from the time when the detection signal acquisition unit 52 receives the detection signal (detection signal indicating the presence of edge crack) from the edge crack sensor 30, the speed of the metal plate S, and the like. It may be calculated based on the distance between the edge crack sensor 30 and the winder 14, the mandrel diameter of the winder 14, and the like.
- step S400 the metal plate S to be wound by the winder 14 is imaged by using an image pickup device such as a camera provided in the vicinity of the winder 14, so that the edge cracked portion is formed by the winder 14. It may be determined whether or not it has been wound up.
- an image pickup device such as a camera provided in the vicinity of the winder 14, so that the edge cracked portion is formed by the winder 14. It may be determined whether or not it has been wound up.
- step S400 While it is not determined in step S400 that the edge cracked portion has been wound by the winder (No in S400), the operation under the second rolling condition (S300) is continued.
- step S400 the operating condition of the rolling apparatus 2 is returned from the second rolling condition to the first rolling condition, and the rolling apparatus 2 is operated. Do (S100).
- the detected edge crack is detected by maintaining the operation under the second rolling condition until the edge crack portion of the metal plate S is wound by the winder 14. Expansion during rolling can be effectively suppressed.
- the rolling condition is changed from the second rolling condition to the first rolling condition, so that the rolling can be performed while suppressing the decrease in production efficiency. It is possible to suppress the expansion of edge cracks inside.
- step S200 in the case of a rolling apparatus 2 including a plurality of rolling stands 10, in step S200 (see FIG. 6), the rolling apparatus 2 is located on the downstream side of the upstream stand 7 (rolling stands 10A of FIGS. 2 and 3).
- the edge crack sensor 30 is used to detect edge cracks.
- the operating condition of the rolling apparatus 2 is changed from the first rolling condition to the second rolling condition capable of suppressing the expansion of the edge crack as described above. (S300).
- step S300 During operation under the second rolling condition in step S300, the region between the upstream stand 7 and the downstream stand 9 until the edge crack passes through the downstream stand 9 (rolling stand 10B in FIGS. 2 and 3).
- the tension at the end of the metal plate S is made smaller than the tension under the first rolling condition. Further, when the edge crack passes through the downstream stand 9, the tension at the end of the metal plate S in the region between the upstream stand 7 and the downstream stand 9 is the tension under the first rolling condition (tension in step S100). Return to.
- the tension of the end portion in the plate width direction in the region between the upstream stand 7 and the downstream stand 9 is applied until the edge crack portion passes through the downstream stand 9. Since the tension is made smaller than the tension under the first rolling condition, it is possible to suppress the expansion of edge cracks during rolling. Further, when the edge cracked portion passes through the downstream side stand 9, the tension at the end portion in the plate width direction in the region between the upstream side stand 7 and the downstream side stand 9 is returned to the tension under the first rolling condition. It is possible to suppress the expansion of edge cracks during rolling while suppressing the decrease in production efficiency.
- FIG. 7 is an example of the flow of the above-mentioned steps S200 to S300 for the rolling apparatus 2 (see FIG. 2 or FIG. 3) including the plurality of rolling stands 10.
- the edge crack is detected by the edge crack sensor 30 located on the downstream side of the upstream stand 7 (rolling stand 10A in FIGS. 2 and 3) in step S200 (S202)
- the following Step S300 is performed in the procedure.
- the tension at the end of the metal plate S in the region downstream of the upstream stand 7 is reduced (S304).
- the first rolling condition is that the 24 or the shift cylinder 26 is placed in each region between the pair of adjacent rolling stands 10 (for example, the region between the rolling stands 10A and 10B, the region between the rolling stands 10B and 10C, etc.). Operate so that the tension is smaller than the tension in.
- the edge cracked portion passes through the rolling stand 10 (rolling stand 10B in FIGS. 2 and 3) immediately after the downstream side of the edge crack sensor 30 (Yes in S306), the rolling stand 10 (rolling stand 10B). And the tension of the end portion of the metal plate S in the region between the rolling stand (rolling stand 10A) located on the upstream side thereof is returned to the same tension as the first rolling condition (S308). In this way, the edge cracked portion performs the operation of restoring the tension of the end portion of the metal plate S in the region between the rolling stand 10 through which the edge cracked portion has passed and the adjacent rolling stand 10 on the upstream side thereof. Repeat until the rolling stand 10 on the downstream side (final stand; rolling stand 10B in FIG. 2, rolling stand 10D in FIG. 3) is passed (No in S310, S312). When the edge cracked portion passes through the final stand (Yes in S310), the process ends in step S300 and proceeds to step S400 (see FIG. 6).
- the metal plate S in the region between the rolling stand 10 and the adjacent rolling stand 10 on the upstream side thereof Since the tension at the end is made smaller than the tension under the first rolling condition, it is possible to suppress the expansion of edge cracks during rolling. Further, when the edge cracked portion passes through the rolling stand 10 on the downstream side, the tension of the end portion of the metal plate S in the region between the rolling stand 10 and the adjacent rolling stand 10 on the upstream side thereof is set as the first rolling condition. Since the tension is returned to the above tension, it is possible to suppress the expansion of edge cracks during rolling while suppressing the decrease in production efficiency.
- the rolling condition determination unit 54 determines the edge crack sensor during rolling in the rolling apparatus 2. Based on the detection result received from 30, the rolling conditions after the next pass by the rolling apparatus 2 of the metal plate S may be determined.
- the rolling condition determination unit 54 determines whether or not the next pass of the metal plate S is rolled by the rolling apparatus 2 based on the size of the edge crack of the metal plate S detected by the edge crack sensor 30. It is configured to determine.
- the size of the edge crack is the length W of the edge crack 90 in the plate width direction of the metal plate S (see FIG. 4) or the length of the edge crack 90 in the longitudinal direction (traveling direction) of the metal plate S. It may be L (see FIG. 4).
- the rolling condition determination unit 54 rolls the metal plate S during rolling of the next pass by the rolling apparatus 2 based on the position of the edge crack in the longitudinal direction of the metal plate S detected by the edge crack sensor 30. It is configured to determine the timing of condition changes.
- the timing of changing the rolling conditions during the rolling of the next pass is determined based on the position of the detected edge crack in the longitudinal direction of the metal plate. It is possible to suppress the expansion of edge cracks during rolling.
- FIG. 8 is a flowchart of the operation method of the rolling apparatus 2 according to the embodiment.
- the flowchart shown in FIG. 8 is intended for a reverse mill (see FIGS. 1 and 2).
- the rolling condition determination unit 54 determines the next pass (((S)) based on the size of the detected edge crack. It is determined whether or not the rolling of M + 1) pass) is possible (S504).
- step S504 for example, if the size of the edge crack is larger than the specified value, it is determined that rolling of the next pass is not possible (No in S504), and rolling of the metal plate S is stopped (S505). On the other hand, in step S504, for example, if the size of the edge crack is equal to or less than the specified value, it is determined that rolling of the next pass is possible (Yes in S504).
- the rolling condition determination unit 54 determines whether or not it is necessary to change the pass schedule (that is, change the target plate thickness) in the rolling of the next pass ((M + 1) th pass) (S506).
- the above determination may be made based on the size of the edge crack detected in step S502. For example, when the size of the edge crack is larger than the specified value, it may be determined that the target plate thickness needs to be set larger than originally planned. Alternatively, in step S506, it may be determined whether or not the path schedule needs to be changed based on the stress related to the edge crack or the shape of the edge crack.
- the pass schedule is changed (that is, the target plate thickness of the rolling apparatus 2 is changed; step S508).
- the rolling apparatus 2 rolls the next pass ((M + 1) pass) of the metal plate S while tracking the position of the edge cracked portion (S510).
- step S510 for example, the position of the edge crack in the longitudinal direction of the metal plate S is calculated based on the detection result of the edge crack sensor 30 in step S502. Then, based on the position of the edge crack calculated in this way, the rolling conditions may be changed before and after the time when the edge crack portion departs from the unwinding machine 4. For example, compared to the period from the first time point when rolling of the (M + 1) th pass to the second time point where the edge cracked portion starts from the unwinder 4, the edge cracked portion is a winder from the second time point. In the period up to the third time point of winding, the tension at the end of the metal plate S may be reduced, or the traveling speed of the metal plate S may be reduced.
- the rolling apparatus 2 is a reverse mill, by determining the rolling conditions after the next pass based on the detection result of the edge crack sensor 30 during rolling, the edge cracks during rolling after the next pass are determined. Expansion and plate breakage can be effectively suppressed.
- the control device for the rolling apparatus is A control device for a rolling apparatus equipped with at least one rolling stand for rolling a metal plate.
- a detection signal acquisition unit for receiving an edge crack detection signal at the edge in the plate width direction of the metal plate from the edge crack sensor, and a detection signal acquisition unit.
- a rolling condition determination unit for determining the rolling conditions of the rolling apparatus, Equipped with When the detection signal acquisition unit receives the edge crack detection signal, the rolling condition determining unit sets the rolling conditions of the rolling apparatus from the first rolling condition immediately before the edge crack is detected. It is configured to change to the second rolling condition that can suppress the expansion of the edge crack rather than the rolling condition.
- the rolling condition of the rolling apparatus is changed to the rolling condition that can suppress the expansion of the edge crack (second rolling condition). Since it is changed to, it is possible to suppress the expansion of edge cracks during rolling and the plate breakage caused by this.
- the rolling condition determining unit After receiving the edge crack detection signal in the detection signal acquisition unit, the rolling condition determining unit is at least until a portion of the metal plate including the edge crack is wound by the winding machine of the rolling apparatus. During that time, the rolling conditions of the rolling apparatus are configured to be maintained at the second rolling conditions.
- the edge crack portion when the edge crack is detected, the second rolling is performed until the portion of the metal plate including the edge crack (hereinafter referred to as the edge crack portion) is wound by the winder. Operation under conditions is maintained. Therefore, it is possible to effectively suppress the detected edge cracks from expanding during rolling.
- the rolling condition determining unit is configured to return the rolling conditions in the rolling apparatus to the first rolling conditions when the portion of the metal plate including the edge crack is wound by the winding machine. ..
- the rolling condition determining unit is configured to make the advancing speed of the metal plate lower than the advancing speed of the metal plate under the first rolling condition during the operation of the rolling apparatus under the second rolling condition.
- the traveling speed of the metal plate is made smaller during the operation of the rolling apparatus under the second rolling condition than during the operation under the first rolling condition. Even when the plate breaks due to edge cracking, damage to surrounding equipment and the like can be reduced.
- the rolling condition determining unit is configured to make the tension at the end portion of the metal plate in the plate width direction smaller than the tension under the first rolling condition during the operation of the rolling apparatus under the second rolling condition. Will be done.
- the tension at the end portion of the metal plate in the plate width direction is made smaller than that during the operation of the rolling apparatus under the second rolling condition and during the operation under the first rolling condition. , It is possible to suppress the expansion of edge cracks during rolling.
- the at least one rolling stand includes an upstream stand provided on the upstream side of the edge crack detection position in the traveling direction of the metal plate.
- the edge cracks generated in the metal plate is small, it may be difficult to detect the edge cracks with the detector.
- the edge cracks can be detected more reliably.
- the at least one rolling stand includes a downstream stand provided on the downstream side of the detection position of the edge crack in the traveling direction.
- the rolling condition determination unit is in operation of the rolling apparatus under the second rolling condition. Until the edge crack passes through the downstream stand, the tension of the end portion of the metal plate in the plate width direction in the region between the upstream stand and the downstream stand is higher than the tension under the first rolling condition. Also make it smaller After the edge crack has passed through the downstream stand, the tension in the region is configured to return to the tension under the first rolling conditions.
- the tension at the end portion in the plate width direction in the region between the upstream stand and the downstream stand until the edge crack passes through the downstream stand is made smaller than the tension under the first rolling condition, so that the expansion of edge cracks during rolling can be suppressed.
- the tension at the end portion in the plate width direction in the region between the upstream side stand and the downstream side stand is returned to the tension under the first rolling condition, so that the production efficiency is increased. It is possible to suppress the expansion of edge cracks during rolling while suppressing the decrease in the amount of
- the rolling apparatus is configured to perform a plurality of passes of rolling the metal plate.
- the rolling condition determination unit is configured to determine the rolling conditions of the metal plate after the next pass by the rolling apparatus based on the detection result received from the edge crack sensor during rolling by the rolling apparatus. ..
- the rolling conditions for the next and subsequent passes are determined based on the detection result of the edge crack sensor during rolling. Therefore, it is possible to suppress the expansion of edge cracks and plate breakage during rolling after the next pass.
- the rolling condition determining unit is configured to determine whether or not to roll the next pass of the metal plate by the rolling apparatus based on the size of the edge crack of the metal plate detected by the edge crack sensor. Will be done.
- the rolling condition determining unit determines the rolling conditions during the rolling of the next pass of the metal plate by the rolling apparatus based on the position of the edge crack of the metal plate in the longitudinal direction of the metal plate detected by the edge crack sensor. It is configured to determine the timing of changes.
- the timing of changing the rolling conditions during the rolling of the next pass is determined based on the position of the detected edge crack in the longitudinal direction of the metal plate, so that the production efficiency is lowered. While suppressing it, it is possible to suppress the expansion of edge cracks during rolling.
- the rolling equipment is A rolling machine that includes at least one rolling stand for rolling metal plates, and An edge crack sensor configured to detect edge cracks at the end in the plate width direction of the metal plate during rolling with the rolling apparatus, and an edge crack sensor.
- the control device according to any one of (1) to (10) above, which is configured to control the rolling device based on a detection signal from the edge crack sensor. To prepare for.
- the rolling condition of the rolling apparatus is changed to the rolling condition that can suppress the expansion of the edge crack (second rolling condition). Since it is changed to, it is possible to suppress the expansion of edge cracks during rolling and the plate breakage caused by this.
- the edge crack sensor is A radiation generating part configured to generate radiation toward the end of the metal plate, and a radiation generating part. It includes a radiation detection unit provided on the side opposite to the radiation generation unit with the metal plate interposed therebetween and configured to receive the radiation from the radiation generation unit.
- the rolling roll of the rolling stand In the vicinity of the rolling roll of the rolling stand, a large amount of rolling oil and fume are scattered, the rolling roll vibrates, and it is often a harsh environment such as darkness.
- the edge cracking sensor including the radiation generating part and the radiation detecting part and detecting the edge cracking by using radiation is used, the rolling roll in a harsh environment can be used. It is possible to detect edge cracks in the vicinity.
- the method of operating the rolling mill according to at least one embodiment of the present invention is as follows.
- a method of operating a rolling mill that includes at least one rolling stand.
- the step of rolling a metal plate with the rolling apparatus A step of detecting an edge crack at an end portion of the metal plate in the plate width direction during rolling with the rolling apparatus, and a step of detecting the edge crack.
- the rolling condition of the rolling apparatus can be changed from the first rolling condition immediately before the edge crack is detected to the expansion of the edge crack more than the first rolling condition. Steps to change to the second rolling conditions To prepare for.
- the rolling condition of the rolling apparatus is changed to the rolling condition that can suppress the expansion of the edge crack (second rolling condition). Since it is changed to, it is possible to suppress the expansion of edge cracks during rolling and the plate breakage caused by this.
- the present invention is not limited to the above-described embodiments, and includes a modified form of the above-described embodiments and a combination of these embodiments as appropriate.
- an expression representing a relative or absolute arrangement such as “in a certain direction”, “along a certain direction”, “parallel”, “orthogonal”, “center”, “concentric” or “coaxial”. Strictly represents not only such an arrangement, but also a tolerance or a state of relative displacement at an angle or distance to the extent that the same function can be obtained.
- expressions such as “same”, “equal”, and “homogeneous” that indicate that things are in the same state not only represent exactly the same state, but also have tolerances or differences to the extent that the same function can be obtained. It shall also represent the existing state.
- the expression representing a shape such as a quadrangular shape or a cylindrical shape not only represents a shape such as a quadrangular shape or a cylindrical shape in a geometrically strict sense, but also within a range in which the same effect can be obtained.
- the shape including the uneven portion, the chamfered portion, etc. shall also be represented.
- the expression “comprising”, “including”, or “having” one component is not an exclusive expression excluding the existence of another component.
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Abstract
Description
金属板を圧延するための少なくとも1つの圧延スタンドを備えた圧延装置の制御装置であって、
前記金属板の板幅方向端部におけるエッジ割れの検出信号をエッジ割れセンサから受け取るための検出信号取得部と、
前記圧延装置の圧延条件を決定するための圧延条件決定部と、
を備え、
前記圧延条件決定部は、前記検出信号取得部において前記エッジ割れの検出信号を受け取ったとき、前記圧延装置の圧延条件を、前記エッジ割れが検出される直前の第1圧延条件から、前記第1圧延条件よりも前記エッジ割れの拡大を抑制可能な第2圧延条件に変更するように構成される。
金属板を圧延するための少なくとも1つの圧延スタンドを含む圧延装置と、
前記圧延装置での圧延中に前記金属板の板幅方向端部におけるエッジ割れを検出するように構成されたエッジ割れセンサと、
前記エッジ割れセンサからの検出信号に基づいて、前記圧延装置を制御するように構成された上述の制御装置と、
を備える。
少なくとも1つの圧延スタンドを含む圧延装置の運転方法であって、
前記圧延装置により金属板を圧延するステップと、
前記圧延装置での圧延中に前記金属板の板幅方向端部におけるエッジ割れを検出するステップと、
前記金属板のエッジ割れが検出されたとき、前記圧延装置の圧延条件を、前記エッジ割れが検出される直前の第1圧延条件から、前記第1圧延条件よりも前記エッジ割れの拡大を抑制可能な第2圧延条件に変更するステップと、
を備える。
まず、幾つかの実施形態に係る制御装置を含む圧延設備の全体構成について説明する。 図1~図3は、それぞれ、一実施形態に係る制御装置を備えた圧延設備の概略構成図である。図1~図3に示すように、圧延設備1は、金属板Sを圧延するように構成された圧延装置2と、金属板Sのエッジ割れを検出するためのエッジ割れセンサ30と、エッジ割れセンサ30からの検出信号に基づいて圧延装置2を制御するための制御装置50と、を備えている。
以下、幾つかの実施形態に係る圧延装置の運転方法について説明する。なお、以下において、上述の制御装置50を用いて一実施形態に係る圧延装置の運転を制御する場合について説明するが、幾つかの実施形態では、他の装置を用いて圧延装置を運転してもよい。あるいは、幾つかの実施形態では、以下に説明する運転方法の一部又は全部をオペレータの操作によって行ってもよい。
金属板を圧延するための少なくとも1つの圧延スタンドを備えた圧延装置の制御装置であって、
前記金属板の板幅方向端部におけるエッジ割れの検出信号をエッジ割れセンサから受け取るための検出信号取得部と、
前記圧延装置の圧延条件を決定するための圧延条件決定部と、
を備え、
前記圧延条件決定部は、前記検出信号取得部において前記エッジ割れの検出信号を受け取ったとき、前記圧延装置の圧延条件を、前記エッジ割れが検出される直前の第1圧延条件から、前記第1圧延条件よりも前記エッジ割れの拡大を抑制可能な第2圧延条件に変更するように構成される。
前記圧延条件決定部は、前記検出信号取得部において前記エッジ割れの検出信号を受け取った後、少なくとも、前記金属板のうち前記エッジ割れを含む部位が前記圧延装置の巻取機で巻取られるまでの間、前記圧延装置の圧延条件を前記第2圧延条件に維持するように構成される。
前記圧延条件決定部は、前記金属板のうち前記エッジ割れを含む前記部位が前記巻取機で巻取られたら、前記圧延装置での圧延条件を前記第1圧延条件に戻すように構成される。
前記圧延条件決定部は、前記第2圧延条件での前記圧延装置の運転中、前記金属板の進行速度を、前記第1圧延条件での前記金属板の進行速度よりも小さくするように構成される。
前記圧延条件決定部は、前記第2圧延条件での前記圧延装置の運転中、前記金属板の板幅方向端部における張力を、前記第1圧延条件での前記張力よりも小さくするように構成される。
前記少なくとも1つの圧延スタンドは、前記金属板の進行方向において前記エッジ割れの検出位置よりも上流側に設けられる上流側スタンドを含む。
前記少なくとも1つの圧延スタンドは、前記進行方向において前記エッジ割れの前記検出位置よりも下流側に設けられる下流側スタンドを含み、
前記圧延条件決定部は、前記第2圧延条件での前記圧延装置の運転中、
前記エッジ割れが前記下流側スタンドを通過するまでは、前記上流側スタンドと前記下流側スタンドの間の領域における前記金属板の板幅方向端部の張力を前記第1圧延条件での前記張力よりも小さくし、
前記エッジ割れが前記下流側スタンドを通過したら、前記領域における前記張力を前記第1圧延条件での前記張力に戻すように構成される。
前記圧延装置は、前記金属板の圧延を複数パス行うように構成され、
前記圧延条件決定部は、前記圧延装置での圧延中に前記エッジ割れセンサから受け取った検出結果に基づいて、前記金属板の前記圧延装置による次パス以降の圧延条件を決定するように構成される。
前記圧延条件決定部は、前記エッジ割れセンサにより検出される前記金属板のエッジ割れのサイズに基づいて、前記金属板の前記圧延装置による次パスの圧延を行うか否かを決定するように構成される。
前記圧延条件決定部は、前記エッジ割れセンサにより検出される前記金属板のエッジ割れの前記金属板の長手方向における位置に基づいて、前記金属板の前記圧延装置による次パスの圧延中における圧延条件変更のタイミングを決定するように構成される。
金属板を圧延するための少なくとも1つの圧延スタンドを含む圧延装置と、
前記圧延装置での圧延中に前記金属板の板幅方向端部におけるエッジ割れを検出するように構成されたエッジ割れセンサと、
前記エッジ割れセンサからの検出信号に基づいて、前記圧延装置を制御するように構成された上記(1)乃至(10)の何れか一項に記載の制御装置と、
を備える。
前記エッジ割れセンサは、
前記金属板の端部に向けて放射線を発生するように構成された放射線発生部と、
前記金属板を挟んで前記放射線発生部とは反対側に設けられ、前記放射線発生部からの前記放射線を受けるように構成された放射線検出部と、を含む。
少なくとも1つの圧延スタンドを含む圧延装置の運転方法であって、
前記圧延装置により金属板を圧延するステップと、
前記圧延装置での圧延中に前記金属板の板幅方向端部におけるエッジ割れを検出するステップと、
前記金属板のエッジ割れが検出されたとき、前記圧延装置の圧延条件を、前記エッジ割れが検出される直前の第1圧延条件から、前記第1圧延条件よりも前記エッジ割れの拡大を抑制可能な第2圧延条件に変更するステップと、
を備える。
例えば、「同一」、「等しい」及び「均質」等の物事が等しい状態であることを表す表現は、厳密に等しい状態を表すのみならず、公差、若しくは、同じ機能が得られる程度の差が存在している状態も表すものとする。
また、本明細書において、四角形状や円筒形状等の形状を表す表現は、幾何学的に厳密な意味での四角形状や円筒形状等の形状を表すのみならず、同じ効果が得られる範囲で、凹凸部や面取り部等を含む形状も表すものとする。
また、本明細書において、一の構成要素を「備える」、「含む」、又は、「有する」という表現は、他の構成要素の存在を除外する排他的な表現ではない。
2 圧延装置
4 巻出し機
6 入側ピンチロール
7 上流側スタンド
9 下流側スタンド
10 圧延スタンド
10A 圧延スタンド
10B 圧延スタンド
10C 圧延スタンド
10D 圧延スタンド
11 モータ
12 出側ピンチロール
14 巻取機
15 圧延ロール
16 圧延ロール
17 中間ロール
18 中間ロール
19 バックアップロール
20 バックアップロール
22 圧下装置
23 ロールベンダ
24 ヒータ
26 シフトシリンダ
30 エッジ割れセンサ
32 放射線発生部
34 放射線検出部
50 制御装置
52 検出信号取得部
54 圧延条件決定部
56 制御部
E 板端
S 金属板
Claims (13)
- 金属板を圧延するための少なくとも1つの圧延スタンドを備えた圧延装置の制御装置であって、
前記金属板の板幅方向端部におけるエッジ割れの検出信号をエッジ割れセンサから受け取るための検出信号取得部と、
前記圧延装置の圧延条件を決定するための圧延条件決定部と、
を備え、
前記圧延条件決定部は、前記検出信号取得部において前記エッジ割れの検出信号を受け取ったとき、前記圧延装置の圧延条件を、前記エッジ割れが検出される直前の第1圧延条件から、前記第1圧延条件よりも前記エッジ割れの拡大を抑制可能な第2圧延条件に変更するように構成された
圧延装置の制御装置。 - 前記圧延条件決定部は、前記検出信号取得部において前記エッジ割れの検出信号を受け取った後、少なくとも、前記金属板のうち前記エッジ割れを含む部位が前記圧延装置の巻取機で巻取られるまでの間、前記圧延装置の圧延条件を前記第2圧延条件に維持するように構成された
請求項1に記載の圧延装置の制御装置。 - 前記圧延条件決定部は、前記金属板のうち前記エッジ割れを含む前記部位が前記巻取機で巻取られたら、前記圧延装置での圧延条件を前記第1圧延条件に戻すように構成された
請求項2に記載の圧延装置の制御装置。 - 前記圧延条件決定部は、前記第2圧延条件での前記圧延装置の運転中、前記金属板の進行速度を、前記第1圧延条件での前記金属板の進行速度よりも小さくするように構成された
請求項1乃至3の何れか一項に記載の圧延装置の制御装置。 - 前記圧延条件決定部は、前記第2圧延条件での前記圧延装置の運転中、前記金属板の板幅方向端部における張力を、前記第1圧延条件での前記張力よりも小さくするように構成された
請求項1乃至3の何れか一項に記載の圧延装置の制御装置。 - 前記少なくとも1つの圧延スタンドは、前記金属板の進行方向において前記エッジ割れの検出位置よりも上流側に設けられる上流側スタンドを含む
請求項1乃至5の何れか一項に記載の圧延装置の制御装置。 - 前記少なくとも1つの圧延スタンドは、前記進行方向において前記エッジ割れの前記検出位置よりも下流側に設けられる下流側スタンドを含み、
前記圧延条件決定部は、前記第2圧延条件での前記圧延装置の運転中、
前記エッジ割れが前記下流側スタンドを通過するまでは、前記上流側スタンドと前記下流側スタンドの間の領域における前記金属板の板幅方向端部の張力を前記第1圧延条件での前記張力よりも小さくし、
前記エッジ割れが前記下流側スタンドを通過したら、前記領域における前記張力を前記第1圧延条件での前記張力に戻す
ように構成された
請求項6に記載の圧延装置の制御装置。 - 前記圧延装置は、前記金属板の圧延を複数パス行うように構成され、
前記圧延条件決定部は、前記圧延装置での圧延中に前記エッジ割れセンサから受け取った検出結果に基づいて、前記金属板の前記圧延装置による次パス以降の圧延条件を決定するように構成された
請求項1乃至7の何れか一項に記載の圧延装置の制御装置。 - 前記圧延条件決定部は、前記エッジ割れセンサにより検出される前記金属板のエッジ割れのサイズに基づいて、前記金属板の前記圧延装置による次パスの圧延を行うか否かを決定するように構成された
請求項8に記載の圧延装置の制御装置。 - 前記圧延条件決定部は、前記エッジ割れセンサにより検出される前記金属板のエッジ割れの前記金属板の長手方向における位置に基づいて、前記金属板の前記圧延装置による次パスの圧延中における圧延条件変更のタイミングを決定するように構成された
請求項8に記載の圧延装置の制御装置。 - 金属板を圧延するための少なくとも1つの圧延スタンドを含む圧延装置と、
前記圧延装置での圧延中に前記金属板の板幅方向端部におけるエッジ割れを検出するように構成されたエッジ割れセンサと、
前記エッジ割れセンサからの検出信号に基づいて、前記圧延装置を制御するように構成された請求項1乃至10の何れか一項に記載の制御装置と、
を備える圧延設備。 - 前記エッジ割れセンサは、
前記金属板の端部に向けて放射線を発生するように構成された放射線発生部と、
前記金属板を挟んで前記放射線発生部とは反対側に設けられ、前記放射線発生部からの前記放射線を受けるように構成された放射線検出部と、を含む
請求項11に記載の圧延設備。 - 少なくとも1つの圧延スタンドを含む圧延装置の運転方法であって、
前記圧延装置により金属板を圧延するステップと、
前記圧延装置での圧延中に前記金属板の板幅方向端部におけるエッジ割れを検出するステップと、
前記金属板のエッジ割れが検出されたとき、前記圧延装置の圧延条件を、前記エッジ割れが検出される直前の第1圧延条件から、前記第1圧延条件よりも前記エッジ割れの拡大を抑制可能な第2圧延条件に変更するステップと、
を備える圧延装置の運転方法。
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