CN118043148A - Warp control device for tandem mill - Google Patents
Warp control device for tandem mill Download PDFInfo
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- CN118043148A CN118043148A CN202280063254.0A CN202280063254A CN118043148A CN 118043148 A CN118043148 A CN 118043148A CN 202280063254 A CN202280063254 A CN 202280063254A CN 118043148 A CN118043148 A CN 118043148A
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- 238000005096 rolling process Methods 0.000 claims abstract description 148
- 239000000463 material Substances 0.000 claims abstract description 50
- 238000005259 measurement Methods 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims description 14
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 7
- 239000010959 steel Substances 0.000 abstract description 7
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- 238000010586 diagram Methods 0.000 description 14
- 230000006870 function Effects 0.000 description 6
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- 230000000694 effects Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 229940029329 intrinsic factor Drugs 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003287 optical effect Effects 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
- B21B37/58—Roll-force control; Roll-gap control
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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
- B21B37/68—Camber or steering control for strip, sheets or plates, e.g. preventing meandering
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- 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
- B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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Abstract
Provided is a warp control device for a tandem rolling mill, which can reduce the warp of the front end of a rolled material and can restrain the occurrence of a tower in a steel strip coil. The front end warping measuring unit calculates a front end warping measurement value of the front end of the rolled material based on the meandering amount of the rolled material detected by the meandering amount detector. The warp correction leveling operation unit calculates a warp correction leveling amount based on the tip warp measurement value. The front end leveling setting unit sets a front end leveling correction amount and a front end leveling control length for reducing front end warping for the push-down leveling device of each rolling stand. Before the rolled stock enters each rolling mill stand, the pressing leveling control part adjusts the pressing leveling device to a position added with the front end leveling correction amount, and after the rolling length in each rolling mill stand reaches the front end leveling control length, the pressing leveling control part adjusts the position of the pressing leveling device so that the front end leveling correction amount gradually decreases.
Description
Technical Field
The present disclosure relates to a warp control device for a tandem rolling mill such as a hot finishing mill, and more particularly, to a tandem rolling mill including a plurality of rolling stands each having a reduction leveling device.
Background
When rolling a rolled material by a tandem rolling mill, a phenomenon in which the rolled material is displaced from the center position in the roll width direction and is moved in either the right or left direction (driving side and working side) is called hunting. On the other hand, the shape of the rolled material itself bent in the width direction is called a warp (camber: camber). It is known that a large warp tends to occur locally in the vicinity of the leading end and the trailing end of the rolled material. The warpage of the rolled steel strip causes a deflection of the rolled steel strip, which is called a tower (telescope). The tower shape of the coil may cause accidents in the transport of the coil. In addition, a large warp of the tail end of the rolled material may collide with a side guide between the rolling stands and a side guide on the entry side of the coiler, and cause a pass failure. If such a failure occurs, accident handling, repair work of equipment, and the like occur, and productivity is lowered. Therefore, it is necessary to suppress warpage.
Here, the difference between the left and right rolling reduction amounts in the rolling step is expressed as a difference in elongation in the rolling direction. As a cause of the difference between the left and right rolling reduction amounts, there are a deviation in adjustment of the rolling leveling, a difference in rolling reaction force due to a difference in temperature between left and right of the rolled material, wear of deflection of the rolls, a difference in thickness of the base material between left and right, and the like.
In order to suppress warping, it is necessary to appropriately adjust the left-right opening between the upper and lower rolls by depressing the leveling device. In order to correct local warpage of the distal end portion or the like, it is necessary to accurately measure the warpage shape at each position in the longitudinal direction of the rolled material. However, since measurement of the warp shape over the entire length of the rolled material is technically difficult, many control methods using the result of the measurement of the meandering in place of the warp shape have been proposed. Since the roughing mill can repeatedly perform measurement and adjustment of the reduction leveling, there are many proposals for a control method applied to the roughing mill, but warping occurs in the finishing mill. In particular, warpage is often left in the vicinity of the leading end and the vicinity of the trailing end of the constraint without tension.
In patent document 1, in order to suppress occurrence of a tower of a coil of steel, the reduction leveling of the final roll stand is controlled so that the meandering amount falls within a predetermined range based on the meandering amount detected by meandering amount detectors provided on the exit side and the entrance side of the final roll stand. The method described in patent document 1 is feedback control based on a so-called hunting amount detection value. In patent document 2, the length of the warp and the amount of the warp are detected by a shape detector provided on the entry side of the finishing mill, and a leveling correction amount of the mill stand of the finishing mill is set based on the detected value.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 2020-131196
Patent document 2: japanese patent No. 2526323
Disclosure of Invention
However, the roll-out-side roll-out amount detector is usually provided at a distance of about 15m from the final stand, and in the feedback control described in patent document 1, the roll-out amount and the warp of the rolled material in a length equal to or less than the distance of the front end portion of the rolled material cannot be controlled.
Further, according to the method of adjusting the position of the reduction leveling based on the warp detected on the entry side of the finishing mill as described in patent document 2, even if the warp generated by the roughing mill can be reduced, it is impossible to suppress the warp caused by the intrinsic factor (hardness) of the finishing mill such as the adjustment deviation of the reduction leveling of each rolling stand of the finishing mill. Further, although it is considered that the rolling leveling of each rolling stand is adjusted and maintained at a fixed rolling leveling position during rolling, the adjustment of the rolling leveling position as described above brings about the same correction effect over the entire length of the rolled material, and it is impossible to correct the local bending of the front end portion, and thus the yield cannot be improved.
The present disclosure has been made to solve the above-described problems, and an object of the present disclosure is to provide a warp control device for a tandem mill that can reduce the warp of the front end portion of a rolled material when the rolled material is rolled by the tandem mill, thereby suppressing the occurrence of a tower in a steel strip coil.
Means for solving the problems
The first aspect relates to a warp control device for a tandem rolling mill. The tandem rolling mill is provided with a plurality of rolling stands having a reduction leveling device. The warp control device is provided with: a meandering amount detector for detecting a meandering amount of the rolled material; a front end warping measuring unit for calculating a front end warping measurement value of the front end of the rolled material based on the amount of meandering detected by the meandering amount detector; a warp correction leveling calculation unit for calculating a warp correction leveling amount, which is a push-down leveling amount required for reducing the front-end warp in each rolling stand, based on the front-end warp measurement value calculated by the front-end warp measurement unit; a front end leveling setting part for setting a front end leveling correction amount and a front end leveling control length, which are set values for reducing front end warping, for the pressing leveling device of each rolling mill stand; and a press leveling control unit that adjusts the press leveling device to a position to which the front end leveling correction amount is added before the rolled material enters each rolling stand, and adjusts the position of the press leveling device so that the front end leveling correction amount gradually decreases after the rolling length in each rolling stand reaches the front end leveling control length.
The second aspect has the following features in addition to the first aspect. The meandering amount detector is arranged on the outlet side of the final rolling mill stand. The warp correction leveling operation unit calculates a warp correction leveling amount based on the front-end warp measurement value on the exit side of the final rolling stand. The warp control device further includes a front-end leveling learning unit that learns, based on the warp correction leveling amount, a front-end leveling correction amount to be applied to rolling of a next rolling material or later. The front-end leveling setting unit sets the latest value updated by the front-end leveling learning unit as a front-end leveling correction amount.
The third aspect has the following features in addition to the first aspect. The meandering amount detector includes a first meandering amount detector disposed on the exit side of the final rolling stand, and at least one second meandering amount detector disposed between any rolling stands. The warp correction leveling calculation unit calculates a warp correction leveling amount for the rolling stands upstream of the second meandering amount detector based on the end warp measurement value at the outlet side of the final rolling stand and the end warp measurement value between the rolling stands. The warp correction leveling operation unit calculates a warp correction leveling amount for the rolling stand downstream of the second meandering amount detector based on the end warp measurement value at the outlet side of the final rolling stand. The warp control device further includes a front-end leveling learning unit that learns, based on the warp correction leveling amount, a front-end leveling correction amount to be applied to rolling of a next rolling material or later. The front-end leveling setting unit sets the latest value updated by the front-end leveling learning unit as a front-end leveling correction amount.
The fourth aspect has the following features in addition to the first aspect. The meandering amount detector is disposed at least one between any of the rolling stands. Immediately after the measurement of the total rolling length required for calculation of the tip warp measurement value by the meandering amount detector is completed, the respective processes of the tip warp measurement unit, warp correction leveling calculation unit, and tip leveling setting unit are executed. The warp correction leveling calculation unit calculates a warp correction leveling amount of each rolling stand on the downstream side of the meandering amount detector based on the tip warp measurement value in the meandering amount detector. The front end leveling setting unit sets a front end leveling correction amount and a front end leveling control length for each rolling stand press leveling device on the downstream side of the meandering amount detector in rolling of the current rolled material based on the warp correction leveling amount.
Effects of the invention
According to the present disclosure, in a tandem rolling mill provided with at least one meandering amount detector, localized warpage of the front end portion of a rolled material can be reduced, and a tower shape of a steel strip coil wound by a coiler can be suppressed. In addition, when the front end passes through the plate, the trouble that the bent front end portion of the rolled material collides with the side guide can be avoided.
Drawings
Fig. 1 is a diagram showing a configuration example of a tandem rolling mill to which the warp control device of the present disclosure is applied.
Fig. 2 is a block diagram showing the structure of the warp control device according to embodiment 1.
Fig. 3 is a diagram for explaining the operation of the push-down leveling device based on the push-down leveling control section in embodiment 1.
Fig. 4 is a diagram for explaining the process performed by the warp correction leveling operation unit in embodiment 1.
Fig. 5 is a block diagram showing the structure of the warp control device according to embodiment 2.
Fig. 6 is a diagram for explaining the processing performed by the warp correction leveling operation unit in embodiment 2.
Fig. 7 is a conceptual diagram showing an example of the hardware configuration of the processing circuit included in the warp control device.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Elements common to the drawings are denoted by the same reference numerals, and repetitive description thereof will be omitted.
[ Tandem Rolling mill ]
Fig. 1 is a diagram showing a configuration example of a tandem rolling mill to which the warp control device of the present disclosure is applied. The tandem rolling mill 1 is a multistage rolling mill provided with a plurality of rolling stands F1, F2, …, fn. n is a natural number of 2 or more. The rolled stock M is steel or other metallic material. The rolled material M is hot rolled to a predetermined plate thickness while moving from the left to the right in the drawing. The rolled material M rolled into a plate shape is wound into a coil by a winding machine, which is not shown.
Each rolling stand Fi (1. Ltoreq.i.ltoreq.n) includes upper and lower work rolls Rw, and upper and lower support rolls Rb respectively arranged on the outer sides of the work rolls Rw in the up-down direction. A pressing device, not shown, is provided on each of the working side and the driving side of the support roller Rb, and the gap between the upper and lower work rolls Rw can be adjusted. Each rolling stand Fi further includes a reduction leveling device Vi (1. Ltoreq.i. Ltoreq.n), and the reduction leveling device adjusts parallelism of either or both of the working side and the driving side of the upper and lower work rolls Rw, so that the difference between the gap between the upper and lower work rolls Rw on the working side and the driving side can be changed. The upper and lower work rolls Rw are brought into contact with each other by the leveling device Vi, and when the pressing devices on the work side and the drive side are screwed by a predetermined amount, the position where the loads detected by the load cell on the work side and the drive side are almost equal is set as a zero reference of the leveling device Vi.
The tandem rolling mill 1 has at least one roll-over detector Di between the stands of the rolling stands F1, F2, …, fn or on the outlet side of the final rolling stand. The hunting amount detector Di includes a first hunting amount detector Dn disposed on the exit side of the final rolling mill stand Fn, and a second hunting amount detector D3 disposed between the stands of the rolling mill stands F3, F4. Each meandering amount detector Di (1.ltoreq.i.ltoreq.n) is provided at a downstream side of the rolling stand Fi with a distance LDi. The meandering amount detector Di may be an optical or contact type detector, and detects the left and right end positions of the rolled material M, and outputs a deviation between the rolled material center position determined by the left and right end positions of the rolled material M and the rolling mill center position as an off-center amount.
The tandem rolling mill 1 includes a setting device 2 and a warp control device 3. The setting device 2 outputs various setting values required for the warp control device 3, specifically, the plate thickness, influence coefficient, front end leveling control length of the final rolling stand Fn, and the like of the rolled material M in each rolling stand Fi to the warp control device 3 before the rolling of the rolled material starts.
The warp control device 3 calculates the reduction leveling setting value of each rolling stand Fi based on the setting value obtained from the setting device 2 and the hunting amount collected by the hunting amount detector Di, and adjusts the reduction leveling device Vi.
Embodiment 1.
Fig. 2 is a block diagram showing the structure of the warp control device 3 according to embodiment 1. The warp control device 3 includes a front-end warp measurement unit 31, a warp correction leveling calculation unit 32, a front-end leveling learning unit 33, a front-end leveling setting unit 34, and a push-down leveling control unit 35. The functions constituting the warp control device 3 will be described in detail below.
Before the start of rolling, the warp control device 3 executes the front end leveling setting unit 34. The front end leveling setting unit 34 determines the "front end leveling correction amount" and the "front end leveling control length" of each rolling stand Fi based on the set value of the next rolled material acquired from the setting device 2 and the learning value acquired from the front end leveling learning unit 33. The front end leveling control length is the length of the front end portion of the rolled material that is intended to control the front end warpage. An arbitrary length is set as the front end leveling control length L CMB,N in the final rolling stand Fn, and is set in a range of 15m to 20m, for example. The front end leveling control length L CMB,i in each roll stand Fi is determined by the plate thickness ratio (h i/hN) of the outlet side plate thickness hi of each roll stand Fi for the front end leveling control length L CMB,N of the final roll stand Fn, as shown in the following formula (1).
[ Math 1]
The front-end leveling setting unit 34 determines the latest learning value acquired from the front-end leveling learning unit 33 as a front-end leveling correction amount. The front end leveling setting unit 34 sets the front end leveling correction amount and the front end leveling control length to the push-down leveling control unit 35 at a predetermined timing before the rolled material M enters each rolling stand Fi.
The screw-down leveling control section 35 has a tracking function of calculating the rolling length in each rolling stand Fi, and operates the screw-down leveling device Vi based on the front-end leveling correction amount and the front-end leveling control length set by the front-end leveling setting section 34.
Fig. 3 is a diagram for explaining the operation of the push-down leveling device Vi based on the push-down leveling control section 35. After the front-end leveling correction amount and the front-end leveling control length are set by the front-end leveling setting section 34, the push-down leveling device Vi is adjusted to a position to which the front-end leveling correction amount is added. If the rolling distance of the rolling stand Fi reaches the front end leveling control length, the position of the leveling device Vi is adjusted and pressed in a mode that the added front end leveling correction amount is gradually reduced.
After the end of the measurement of the front end portion of the rolled material in the meandering amount detector Dn on the exit side of the final rolling stand Fn, the warp control device 3 sequentially executes the respective processes of the front end warp measuring unit 31, the warp correction leveling computing unit 32, and the front end leveling learning unit 33 as described below.
The front end warping measuring unit 31 measures the amount of meandering of the front end portion of the rolled material in each of the meandering amount detectors D i between the rolling stands and on the exit side of the final rolling stand Fn. The detection value of the period of time from the arrival of the front end portion of the rolled material at the meandering amount detector D i to the passage of the length specified by the front end leveling control length is collected for each meandering amount. Next, the front end warp measuring unit 31 calculates a front end warp measurement value of the rolled material M using the above-described meandering measurement data. The magnitude of the front-end warpage is defined as an average value of curvature when curve-approximating the variation of the amount of meandering near the front end of the rolled material. As one of the methods for determining the curvature of the tip warpage using the collected snake amount measurement data, a method of determining an approximate polynomial from a relationship obtained by plotting the snake amount measurement data with the measurement position as the X axis and the snake amount as the Y axis and calculating the approximate polynomial by a method shown in the following formula (2) can be used. The following equation (2) gives the curvature of each measurement position. Therefore, when the approximation polynomial is 3 or more, an average value of the curvatures calculated for the respective measurement positions is calculated. In the case where the approximate polynomial is 2 th order, since the unique curvature is calculated, the result becomes an average curvature.
[ Formula 2]
In the above formula (2), K HC,i is the i-th roll stand front end warp curvature.
F HC (χ [ j ]) is an approximate polynomial obtained from the hunting amount measurement data.
F' HC is the first order derivative of the approximation polynomial.
F' HC is the second order derivative of the approximation polynomial.
The warp correction leveling operation unit 32 calculates a correction amount of the push-down leveling required for correcting the front-end warp. Fig. 4 is a diagram for explaining the process performed by the warp correction leveling operation unit 32. First, the warp correction leveling operation unit 32 determines estimated values of the front warp in each of the rolling stands using the front warp measurement values calculated by the front warp measurement unit 31 between the rolling stands and on the outlet side of the final rolling stand. If no meandering amount detector is provided between all the rolling stands, the estimated value of the front end warping in each rolling stand is set to be the same as the measured value of the front end warping on the exit side of the final rolling stand Fn. When a roll-off amount detector is provided between any of the rolling stands and a roll-off amount measured value can be acquired, the roll-off amount measured value in the rolling stand upstream of the roll-off amount detector is calculated by proportionally distributing the roll-off amount measured value in the final rolling stand and the roll-off amount measured value in the roll-off amount detector between the rolling stands as shown in the following formula (3). The front end warping in the rolling stand on the downstream side of the meandering amount detector is set to a value equal to the front end warping measured value on the final rolling stand outlet side.
[ Formula 3]
In the above-mentioned formula (3),The front end warpage extrapolated value.
Is a tip warpage measurement.
Next, the warp correction leveling calculation unit 32 calculates the warp correction leveling amount of each rolling stand using the end warp estimation value and the influence coefficient of each rolling stand as shown in the following expression (4).
[ Math figure 4]
In the above-mentioned formula (4),And correcting and leveling the warping of the ith rolling mill frame.
K HC,i is the front end warp estimate for the ith mill stand.
To influence the coefficients.
The front end leveling learning unit 33 updates the front end leveling correction amount of each rolling stand based on the warp correction leveling amount calculated by the warp correction leveling operation unit 32, as shown in the following expression (5). The "OLD value" is a value determined based on the result of the current rolled material and is stored in a hierarchical table divided according to the conditions of the steel type, size, furnace number, and rolling mill frame number of the rolled material M. The hierarchical table is stored in a memory 30c described later. The "NEW value" is a value updated based on the result of the current rolled material, and the updated latest front-end leveling correction amount is stored in the hierarchical table in an overlaid manner.
[ Formula 5]
For front end leveling correction (NEW value).
For front end leveling correction (OLD value), β is update gain.
As described above, according to the present embodiment, the set values of the reduction leveling devices of all the rolling stands are adaptively corrected based on the front end warp measurement value at the outlet side of the final rolling stand Fn and the front end warp measurement value in the intermediate rolling stand, so that the front end warp can be reduced.
Embodiment 2.
Fig. 5 is a block diagram showing the structure of the warp control device according to embodiment 2. In the present embodiment, the point is different from embodiment 1 described above in that the tip-end warp measurement unit 31 immediately calculates the tip-end warp measurement value after the completion of the hunting amount measurement of the range of the material length given as the tip-end leveling control length of the rolled material tip end portion by the hunting amount detector D3 between the rolling mill stands F3, F4. Immediately after the processing by the tip warp measuring unit 31 is completed, the processing by the warp correction leveling computing unit 32 is performed.
Fig. 6 is a diagram for explaining the process performed by the warp correction leveling operation unit 32. The warp correction leveling calculation unit 32 determines the estimated value of the front-end warp in each of the rolling stands downstream of the meandering amount detector as a value equal to the measured value of the front-end warp. Next, as shown in the above equation (4), the warp correction leveling calculation unit 32 calculates the warp correction leveling amount of each rolling stand downstream of the meandering amount detector by using the front end warp estimated value and the influence coefficient. The front end leveling setting unit 34 is immediately implemented after the warp correction leveling operation unit 32 completes the process.
The front end leveling setting unit 34 determines the front end leveling correction amount and the front end leveling control length set by the reduction leveling device of each rolling stand on the downstream side of the hunting amount detector Di, based on the warp correction leveling amount.
The reduction leveling control unit 35 operates the reduction leveling device Vi of each rolling stand in accordance with the front end leveling correction amount and the front end leveling control length set by the front end leveling setting unit 34, similarly to the above embodiment 1 (see fig. 3).
As described above, according to the present embodiment, the rolling stand is adjusted in the reduction leveling by measuring the front end warp of the pass plate of the rolling material front end portion in the tandem rolling mill 1, and the front end warp of the rolling material M on the exit side of the final rolling stand Fn can be reduced.
The specific structure of the warp control device 3 in the above-described embodiments 1 and 2 is not limited, and may be, for example, the following structure. Fig. 7 is a diagram showing an example of a hardware configuration of a processing circuit included in the warp control device 3. The function of the warp control device 3 can be realized by the processing circuit 30 shown in fig. 7. The processing circuitry 30 may also be dedicated hardware 30a. The processing circuit may include a processor 30b and a memory 30c. The processing circuit may be partially formed as dedicated hardware 30a, and may further include a processor 30b and a memory 30c. In the example of fig. 7, a part of the processing circuit is formed as dedicated hardware 30a, and the processing circuit further includes a processor 30b and a memory 30c.
At least a portion of the processing circuitry may also be at least one dedicated hardware 30a. In this case, the processing circuit corresponds to, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof.
The processing circuit may also be provided with at least one processor 30b and at least one memory 30. In this case, each function of the warp control device 3 is realized by software, firmware, or a combination of software and firmware. The software and firmware are described as programs and stored in the memory 30c. The processor 30b reads out and executes a program stored in the memory 30c, thereby realizing the functions of each section.
The processor 30b is also referred to as CPU (Central Processing Unit), central processing unit, computing unit, microprocessor, microcomputer, DSP. The memory 30c corresponds to, for example, a nonvolatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, EEPROM, or the like.
In this way, the processing circuit can realize the functions of the warp control device 3 by hardware, software, firmware, or a combination thereof.
The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments and can be variously modified within the scope not departing from the gist of the present invention. The configuration of the tandem rolling mill is not limited to the example shown in fig. 1, and the present invention can be applied to various deformed tandem rolling mills. In the case where the number, the amount, the range, and the like of each element in the above-described embodiment are mentioned, the present invention is not limited to the mentioned number, except for the case where the number is specifically shown or the case where the number is clearly specified in principle. The structure and the like described in the above embodiment are not essential to the present invention, except for the case where they are particularly clear or the case where they are clearly specified in principle.
Description of the reference numerals
1 … Finishing mill (tandem mill), 3 … warping control device, vi … press leveling device, fi … mill stand, M … rolled stock, di … meandering amount detector, dn … first meandering amount detector, D3 … second meandering amount detector, 31 … front end warping measuring part, 32 … warping correction leveling operation part, 33 … front end leveling learning part, 34 … front end leveling setting part, 35 … press leveling control part.
Claims (4)
1. A warp control device of a tandem rolling mill is characterized in that,
The tandem rolling mill is provided with a plurality of rolling stands having a reduction leveling device,
The warp control device for a tandem rolling mill comprises:
A meandering amount detector for detecting a meandering amount of the rolled material;
a front end warping measuring unit that calculates a front end warping measurement value of the front end of the rolled material based on the meandering amount detected by the meandering amount detector;
A warp correction leveling calculation unit that calculates a warp correction leveling amount, which is a reduction leveling amount required to reduce front-end warping at each rolling stand, based on the front-end warp measurement value calculated by the front-end warp measurement unit;
A front end leveling setting unit for setting a front end leveling correction amount and a front end leveling control length, which are set values for reducing front end warpage, for the push-down leveling devices of the rolling stands; and
And the rolling leveling control part is used for adjusting the rolling leveling device to a position after the front end leveling correction amount is added before the rolled material enters each rolling mill stand, and adjusting the position of the rolling leveling device after the rolling length in each rolling mill stand reaches the front end leveling control length so as to gradually reduce the front end leveling correction amount.
2. The warp control device for a tandem rolling mill according to claim 1, wherein,
The meandering amount detector is arranged at the outlet side of the final rolling mill stand,
The warp correction leveling operation part calculates a warp correction leveling amount based on a front end warp measurement value of the outlet side of the final rolling stand,
The warp control device of the tandem rolling mill further comprises a front end leveling learning part which updates a front end leveling correction amount applied to rolling of a next rolling stock and later in a learning manner based on the warp correction leveling amount,
The front-end leveling setting section sets the latest value updated by the front-end leveling learning section as the front-end leveling correction amount.
3. The warp control device for a tandem rolling mill according to claim 1, wherein,
The meandering amount detector includes a first meandering amount detector arranged on the outlet side of the final rolling mill stand, and at least one second meandering amount detector arranged between any rolling mill stands,
The warp correction leveling operation unit calculates a warp correction leveling amount for a rolling stand on the upstream side of the second meandering amount detector based on the front warp measurement value on the outlet side of the final rolling stand and the front warp measurement value between rolling stands, calculates a warp correction leveling amount for a rolling stand on the downstream side of the second meandering amount detector based on the front warp measurement value on the outlet side of the final rolling stand,
The warp control device for a tandem rolling mill comprises a front-end leveling learning unit for updating the front-end leveling correction amount applied to rolling of a next rolling stock or later in a learning manner based on the warp correction leveling amount,
The front-end leveling setting unit sets the latest value updated by the front-end leveling learning unit as a front-end leveling correction amount.
4. The warp control device for a tandem rolling mill according to claim 1, wherein,
The meandering detector is arranged at least one between any of the rolling stands,
Immediately after the completion of the measurement of the entire rolling length required for the calculation of the tip warp measurement value by the meandering amount detector, the tip warp measurement unit, the warp correction leveling calculation unit, and the tip leveling setting unit execute the respective processes,
The warp correction leveling operation unit calculates warp correction leveling amounts of the rolling stands on the downstream side of the meandering amount detector based on the tip warp measurement value in the meandering amount detector,
The front end leveling setting unit sets a front end leveling correction amount and a front end leveling control length for each rolling stand reduction leveling device on the downstream side of the meandering amount detector in rolling of the current rolled material based on the warp correction leveling amount.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2022/034450 WO2024057454A1 (en) | 2022-09-14 | 2022-09-14 | Camber control device for continuous rolling mill |
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| Publication Number | Publication Date |
|---|---|
| CN118043148A true CN118043148A (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280063254.0A Pending CN118043148A (en) | 2022-09-14 | 2022-09-14 | Warp control device for tandem mill |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPWO2024057454A1 (en) |
| KR (1) | KR20240055775A (en) |
| CN (1) | CN118043148A (en) |
| WO (1) | WO2024057454A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2526323Y2 (en) | 1991-02-22 | 1997-02-19 | 矢崎総業株式会社 | Meter face |
| JP2956934B2 (en) * | 1996-12-16 | 1999-10-04 | 川崎製鉄株式会社 | Rolling control method in hot strip finishing mill |
| CN103611736B (en) * | 2013-11-08 | 2016-03-02 | 首钢总公司 | The method for fast measuring of hot-strip camber |
| JP6356094B2 (en) * | 2015-05-21 | 2018-07-11 | 株式会社神戸製鋼所 | Rolling control device and rolling control method |
| JP7225880B2 (en) * | 2019-02-13 | 2023-02-21 | 日本製鉄株式会社 | Method for manufacturing hot-rolled coil |
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2022
- 2022-09-14 WO PCT/JP2022/034450 patent/WO2024057454A1/en active Application Filing
- 2022-09-14 CN CN202280063254.0A patent/CN118043148A/en active Pending
- 2022-09-14 KR KR1020247009868A patent/KR20240055775A/en unknown
- 2022-09-14 JP JP2024500513A patent/JPWO2024057454A1/ja active Pending
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| Publication number | Publication date |
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| WO2024057454A1 (en) | 2024-03-21 |
| TW202410983A (en) | 2024-03-16 |
| JPWO2024057454A1 (en) | 2024-03-21 |
| KR20240055775A (en) | 2024-04-29 |
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