WO2015029171A1 - Dispositif de réglage d'épaisseur de tôle pour laminoir - Google Patents

Dispositif de réglage d'épaisseur de tôle pour laminoir Download PDF

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Publication number
WO2015029171A1
WO2015029171A1 PCT/JP2013/073051 JP2013073051W WO2015029171A1 WO 2015029171 A1 WO2015029171 A1 WO 2015029171A1 JP 2013073051 W JP2013073051 W JP 2013073051W WO 2015029171 A1 WO2015029171 A1 WO 2015029171A1
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Prior art keywords
rolling
mill
roll
coefficient
constant
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PCT/JP2013/073051
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English (en)
Japanese (ja)
Inventor
宏幸 今成
徳二郎 堀川
修 金子
和暉 大村
山本　茂
Original Assignee
東芝三菱電機産業システム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 東芝三菱電機産業システム株式会社 filed Critical 東芝三菱電機産業システム株式会社
Priority to JP2015533853A priority Critical patent/JP6028871B2/ja
Priority to PCT/JP2013/073051 priority patent/WO2015029171A1/fr
Priority to CN201380079178.3A priority patent/CN105492133B/zh
Priority to KR1020157034505A priority patent/KR101767810B1/ko
Priority to TW102138636A priority patent/TWI571328B/zh
Publication of WO2015029171A1 publication Critical patent/WO2015029171A1/fr

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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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • 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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/18—Automatic gauge 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 invention relates to a sheet thickness control device for a rolling mill.
  • Patent Document 1 describes a plate thickness control device for a rolling mill.
  • the sheet thickness control device identifies the plastic coefficient of the rolling stand based on information on the thickness of the rolled material measured on the upstream side of the rolling stand, information on the rolling load of the rolling stand on the upstream side of the rolling stand, etc. To do.
  • board thickness control apparatus performs plate
  • Patent Document 1 identifies the plastic coefficient of the rolling stand by tracking information on the rolling stand upstream of the rolling stand to the downstream side. For this reason, the plasticity coefficient of a rolling material cannot be identified correctly.
  • An object of the present invention is to provide a plate thickness control device for a rolling mill that can accurately identify the plasticity coefficient of a rolled material.
  • a sheet thickness control device for a rolling mill is a plastic coefficient that identifies a plastic coefficient representing the hardness of a rolled material, based on a rolling load actual value, a roll gap actual value, and a mill constant of a rolling stand to be operated.
  • An identification device is a plastic coefficient that identifies a plastic coefficient representing the hardness of a rolled material, based on a rolling load actual value, a roll gap actual value, and a mill constant of a rolling stand to be operated.
  • the plasticity coefficient of the rolled material can be accurately identified.
  • FIG. 1 is a configuration diagram of a rolling mill using a rolling mill thickness control apparatus according to Embodiment 1 of the present invention.
  • the rolling stand for hot sheet rolling is a 4Hi mill.
  • the rolling stand includes a housing 1.
  • an upper work roll 2a and a lower work roll 2b are provided as rolling rolls.
  • One side of the shaft of the upper work roll 2a is connected to an electric motor (not shown).
  • a work area is secured around the other side of the upper work roll 2a.
  • One side of the shaft of the lower work roll 2b is connected to an electric motor (not shown).
  • a work area is secured around the other side of the lower work roll 2b.
  • An upper backup roll 3a is provided as a rolling roll above the upper work roll 2a.
  • the upper backup roll 3a supports the upper work roll 2a.
  • the upper backup roll 3 a is supported on the upper part of the housing 1.
  • One side of the shaft of the upper backup roll 3a is connected to an electric motor (not shown).
  • a work area is secured around the other side of the upper backup roll 3a.
  • a lower backup roll 3b is provided as a rolling roll.
  • the lower backup roll 3b supports the lower work roll 2b.
  • the lower backup roll 3 b is supported at the lower part of the housing 1.
  • One side of the shaft of the lower backup roll 3b is connected to an electric motor (not shown).
  • a work area is secured around the other side of the lower backup roll 3b.
  • a reduction device 4 is provided above the upper backup roll 3a.
  • the reduction device 4 is an electric reduction device.
  • the reduction device 4 is a hydraulic reduction device that is driven by hydraulic pressure.
  • the hydraulic reduction device can be controlled at high speed.
  • the reduction device 4 includes a drive side reduction device 4a and an operation side reduction device 4b.
  • the drive side reduction device 4a is provided on one side of the upper backup roll 3a.
  • the operation side reduction device 4b is provided on the other side of the upper backup roll 3a.
  • a load detector 5 is provided below the lower backup roll 3b.
  • the load detector 5 includes a drive side load detector 5a and an operation side load detector 5b.
  • the drive side load detector 5a is provided on one side of the lower backup roll 3b.
  • the operation side load detector 5b is provided on the other side of the upper backup roll 3a.
  • a roll gap detector 6 is provided below the reduction device 4.
  • the roll gap detector 6 includes a drive side roll gap detector 6a and an operation side roll gap detector 6b.
  • the drive-side roll gap detector 6a is provided on one side of the upper backup roll 3a.
  • the operation side roll gap detector 6b is provided on the other side of the upper backup roll 3a.
  • the input side of the rolling load measuring device 7 is connected to the output side of the load detector 5.
  • the input side of the roll gap measuring device 8 is connected to the output side of the roll gap detector 6.
  • the input side of the plate thickness controller 9 is connected to the output side of the rolling load measuring device 7.
  • the input side of the plate thickness controller 9 is connected to the output side of the roll gap measuring device 8.
  • the input side of the roll gap operating means 10 is connected to the output side of the plate thickness controller 9.
  • the output side of the roll gap operating means 10 is connected to the input side of the reduction device 4.
  • the lower work roll 2b is provided with a roll rotation number detector 11.
  • a thickness gauge 12 is provided on the exit side of the rolling stand.
  • the rolled material 13 is made of metal.
  • the rolled material 13 is sandwiched between the upper work roll 2a and the lower work roll 2b. As a result, the rolled material 13 extends.
  • the upper backup roll 3a suppresses the deflection in the width direction of the upper work roll 2a.
  • the lower backup roll 3b suppresses the deflection in the width direction of the lower work roll 2b.
  • the rolling load on the rolled material 13 is received by the housing 1 through the upper work roll 2a, the lower work roll 2b, the upper backup roll 3a, and the lower backup roll 3b.
  • the drive side load detector 5a detects a load applied to one side of the lower backup roll 3b.
  • the operation side load detector 5b detects a load applied to the other side of the lower backup roll 3b.
  • the rolling load measuring device 7 calculates the sum of the detection value of the drive side load detector 5a and the detection value of the operation side load detector 5b as a sum load.
  • the rolling load measuring device 7 calculates the difference between the detection value of the drive side load detector 5a and the detection value of the operation side load detector 5b as a differential load.
  • a roll bending apparatus not shown
  • the rolling load measuring device 7 performs calculation when correcting the detection value of the load detector 5 with the roll bending force.
  • the roll gap detector 6 does not directly detect a gap (roll gap) between the upper work roll 2a and the lower work roll 2b.
  • the roll gap detector 6 detects the amount by which the reduction device 4 pushes down the upper backup roll 3a.
  • the roll gap measuring device 8 calculates the roll gap based on the detection value of the roll gap detector 6. At this time, the roll gap measuring device 8 considers the distance relationship between the upper work roll 2a and the lower work roll 2b.
  • the plate thickness controller 9 adjusts the set value of the roll gap based on the calculated value of the rolling load measuring device 7 and the calculated value of the roll gap measuring device 8. In this case, the plate thickness controller 9 adjusts the setting value of the roll gap with the mill constant M C identified by a not-shown identification apparatus in FIG. 1, a plastic coefficient Q C.
  • the roll gap operating means 10 adjusts the roll gap based on the set value adjusted by the plate thickness controller 9. As a result, the rolled material 13 has a desired plate thickness.
  • the plate thickness of the rolled material 13 is measured by a plate thickness meter 12.
  • the roll rotation number detector 11 detects the rotation number of the lower work roll 2b.
  • the roll rotation number detector 11 detects the rotation position of the lower work roll 2b.
  • the circumferential position of the lower work roll 2b is specified. Specifically, the position of the reference point on the circumference is specified when the lower work roll 2b is regarded as a circle when viewed from the side. For example, the rotation angle of the reference point with respect to the vertical line is specified.
  • FIG. 2 is a control block diagram of a rolling mill using the rolling mill thickness control apparatus according to Embodiment 1 of the present invention.
  • the rolling process 14 to be controlled is affected by the mill constant M and the plasticity factor Q.
  • the rolling process 14 includes a first influence coefficient 14a and a second influence coefficient 14b.
  • the first influence coefficient 14a corresponds to the influence of the roll gap on the rolling load.
  • the first influence coefficient 14a is ⁇ MQ / (M + Q).
  • the second influence coefficient 14b corresponds to the influence of the rolling load on the plate thickness.
  • the second influence coefficient 14b is 1 / M.
  • the rolling process 14 applied with roll eccentricity disturbance [Delta] S D and the rolling load disturbance [Delta] P D is.
  • the roll eccentricity disturbance [Delta] S D and the rolling load disturbance [Delta] P D can not be measured directly.
  • the plate thickness controller 9 implements a monitor AGC 15, a gauge meter AGC 16, an MMC (mill constant variable control) 17, etc. for the rolling process 14.
  • the first control block 18 calculates the plate thickness measurement value change amount ⁇ h MES based on the plate thickness actual change amount ⁇ h ACT measured by the plate thickness meter 12. At this time, the first control block 18 considers the conveyance delay time of the rolled material 13 from the rolling stand to the plate thickness gauge 12.
  • the monitor AGC 15 calculates the GM plate thickness target value change amount ⁇ h REF based on the deviation between the product plate thickness target value change amount ⁇ hx REF and the plate thickness measured value change amount ⁇ h MES .
  • the second control block 16a is represented using mill modulus M C identified.
  • the second control block 16a the coefficient alpha 1 for adjusting the response is added.
  • the GM plate thickness change amount ⁇ h GM is obtained.
  • the gauge meter plate thickness target value change amount ⁇ h GM AIM and the GM plate thickness target value change amount ⁇ h REF are added together.
  • the plate thickness target value change amount ⁇ h GM REF is obtained.
  • the deviation between the plate thickness target value change amount ⁇ h GM REF and the GM plate thickness change amount ⁇ h GM is input to the PI controller 16b.
  • the PI controller 16b is represented by a proportional gain KPG , an integral gain KIG, and a Laplace operator S. It is assumed that the roll gap symbol S is accompanied by a subscript or ⁇ , and the Laplace operator S is used alone.
  • the output of the PI controller 16b is input to the compensation gain 16c.
  • the compensation gain 16c is represented by the identified mill constant M C , plastic coefficient Q C , and coefficients ⁇ 1 and ⁇ 2 for adjusting the response.
  • the compensation gain 16c calculates a roll gap command value ⁇ S SET .
  • the compensation gain 16c normalizes the operation output. In this case, adjustment of the PI controller 16b is not necessary even if the mill constant M, plastic coefficient Q, and coefficients ⁇ 1 and ⁇ 2 to be controlled change.
  • the MMC 17 requests the reduction device 4 for a high-speed response. For this reason, when the reduction device 4 is not a hydraulic reduction device, the MMC 17 is not applied.
  • third control block 17a is represented using mill modulus M C identified.
  • MMC17 by adjusting the coefficient alpha 2 of the third control block 17a, may adjust the response. For example, by increasing the coefficient alpha 2, the response becomes faster.
  • the hydraulic pressure reduction response 17b corresponds to the response of the hydraulic pressure reduction device.
  • the hydraulic pressure reduction response 17b is determined based on a value obtained by superimposing the output of the compensation gain 16c and the output of the third control block 17a. As a result, the roll gap is adjusted.
  • FIG. 3 is a diagram for explaining the influence of the mill constant and the plastic coefficient when rolling a rolled material by a rolling mill using the thickness control device of the rolling mill according to Embodiment 1 of the present invention.
  • the mill curve represents the mill elongation.
  • Mill elongation occurs when the housing 1 or the like receives a large rolling load from the rolled material 13.
  • the mill elongation increases as the rolling load increases.
  • the mill curve is approximated by a quadratic curve or a cubic curve. The mill curve can be measured.
  • Mill constant M represents the ratio of mill elongation.
  • the mill constant M is represented by the slope of the mill curve at the specified rolling load. For example, when the rolling load is 600 (kN) and the mill elongation is 1 (mm), the mill constant M is 600 (kN / mm).
  • the plastic curve is obtained by plotting the change in rolling load when the plate thickness of the rolled material 13 changes.
  • a plastic curve is established.
  • the temperature of the rolling material 13 is low, a plastic curve is established. Plastic curves cannot be measured directly.
  • the plasticity factor Q represents the hardness of the rolled material 13.
  • the plastic coefficient Q is represented by the slope of the plastic curve at a specified rolling load.
  • the initial state is represented by an intersection (a) between the mill curve and the plastic curve.
  • the roll gap is S G.
  • the thickness of the rolling material 13 on the entry side of the rolling stand is H.
  • the thickness of the rolled material 13 on the exit side of the rolling stand is h.
  • FIG. 4 is a diagram for explaining the influence of the mill constant and the plastic coefficient when the rolled material 13 is rolled by a rolling mill using the thickness control device of the rolling mill according to Embodiment 1 of the present invention.
  • the mill constant M is expressed by the following equation (1).
  • the gauge meter type is obtained from the formulas (1) and (2).
  • the gauge meter equation is expressed by the following equation (3).
  • the plastic coefficient Q is expressed by the following equation (4).
  • the plastic coefficient Q is expressed by the following equation (9).
  • the rolling load change amount ⁇ P is expressed by the following formula (12).
  • the thickness variation ⁇ h is represented by the following equation (13).
  • FIG. 5 is a block diagram of the main part of the sheet thickness control apparatus for a rolling mill according to Embodiment 1 of the present invention.
  • the identification device includes a mill constant identification device 19 and a plastic coefficient identification device 20.
  • the mill constant identification device 19 calculates the mill constant M ID based on the rolling load actual change ⁇ P ACT , the roll gap actual change ⁇ S ACT , the sheet thickness actual change ⁇ h ACT , and the roll rotation angle actual value ⁇ 1 .
  • the mill constant M ID is input to the mill constant Mc of the gauge meters AGC16 and MMC17.
  • the mill constant Mc may be a mill constant MMES identified by another method by a kiss roll test or the like.
  • the plastic coefficient identification device 20 calculates the plastic coefficient Q ID based on the rolling load actual change amount ⁇ P ACT , the roll gap actual change amount ⁇ S ACT , the roll rotation angle actual value ⁇ 2 , and the identified mill constant. At this time, the identified mill constant is selected from the mill constant M ID or the mill constant M MES . Plastic factor Q ID is input to the plastic coefficient Q C of the gauge meter AGC 16.
  • FIG. 6 is a main part of a control block diagram of a rolling mill using the rolling mill thickness control apparatus according to Embodiment 1 of the present invention.
  • noise Nh is added to the rolling process 14 of FIG. 2, and the actual plate thickness variation ⁇ h ACT is observed.
  • the change amount ⁇ h of the thickness of the rolled material is expressed by the following equation (14) using an error e 1 due to noise N h .
  • Roll eccentricity disturbance [Delta] S D is the structure of the rolling rolls, caused by inaccuracies such polishing of the rolling rolls. For example, in a support roll having an oil bearing, when the keyway receives a rolling load of several hundred tons to several thousand tons, the shaft moves up and down. By the movement, the roll eccentricity disturbance [Delta] S D will occur. For example, in the rolling roll without keyway, the deviation or the like of the thermal expansion, roll eccentricity disturbance [Delta] S D will occur.
  • Roll eccentricity disturbance [Delta] S D may be considered periodic disturbance synchronizing rotation period of the upper backup roll 3a and a lower backup roll 3b. During rolling, the rolling speed changes. Therefore, the period of roll eccentricity disturbance [Delta] S D varies with time. Roll eccentricity disturbance [Delta] S D, the upper work roll 2a, the lower work roll 2b, the upper backup roll 3a, changes at a constant period with respect to the rotation angle phi 1 (0 ° to 360 °) of the lower backup roll 3b.
  • the roll eccentricity disturbance [Delta] S D is approximated by k-th order Fourier series. Specifically, the roll eccentricity disturbance [Delta] S D is expressed by the following equation (15).
  • the expression (16) is an expression representing the relationship between the respective variables at a certain time of the rolled material 13, and generally a plurality of data sets are obtained from the rolled material 13, and each data set satisfies the expression (16). .
  • parameters such as the mill constant M can be obtained.
  • N N simultaneous equations can be obtained by applying N data to equation (16).
  • variables represented by vectors and matrices are defined below.
  • the data set of ⁇ h ⁇ S is a column vector Y 1 including N ⁇ h ACT ⁇ S ACT elements.
  • the data set [ ⁇ P I cos ⁇ 1 sin ⁇ 1 ... Cos (k ⁇ 1 ) sin (k ⁇ 1 )] is a column vector including N ⁇ P ACT elements, and an N-row 1-column matrix including only one element.
  • I NX1 be a matrix X 1 of N rows and 2k columns containing sin and cos values of N ⁇ 1 .
  • [1 / M a S0 a S1 b S1 ... A Sk b Sk ] T appearing in the first term on the right side of the equation (16) is defined as a column vector ⁇ 1 .
  • the mill constant identification device 19 calculates the mill constant M ID using the equation (18). At this time, the mill constant identification device 19 compensates for the delay time due to the conveyance between the rolling stand and the plate thickness meter 12 with respect to the plate thickness actual value change amount ⁇ h ACT . With this compensation, the sheet thickness actual value variation ⁇ h ACT is synchronized with the rolling load actual variation ⁇ P ACT and the roll gap actual variation ⁇ S ACT .
  • the mill constant M greatly depends on the mechanical characteristics of the housing 1, the upper work roll 2a, the lower work roll 2b, the upper backup roll 3a, and the lower backup roll 3b. For this reason, the mill constant M ID is calculated for each rolling stand.
  • the rolling stand data is accumulated and the mill constant is identified as M [1] (stored) (kN / mm). It is assumed that the same rolling stand data is obtained and the mill constant is identified as M [1] (raw) (kN / mm). In this case, the mill constant identification device 19 stores M [1] (raw).
  • the mill constant identification device 19 stores M [1] (raw).
  • a new smoothed mill constant is used. By smoothing, instability of the identification result due to data variation is suppressed.
  • the new mill constant is expressed by the following equation (19).
  • a is a smoothing gain. a is set to a value from 0 to 1.
  • M [1] raw
  • the mill constant may be slightly different from the mill constant before the replacement.
  • the mill constant identification device 19 increases the ratio of M [1] (raw).
  • the new mill constant is expressed by the following equation (20) using a smoothing gain A larger than a.
  • the rolling load change ⁇ P is expressed by the following equation (21) using the error e 2 due to the noise N h .
  • w is defined by the following equation (23).
  • the slab When the rolled material 13 is a slab in a state before being rolled, the slab is arranged in a heating path (not shown).
  • the heating furnace is provided with a plurality of skids (not shown).
  • the plurality of skids are arranged at substantially equal intervals.
  • the plurality of skids support the slab.
  • the interior of the plurality of skids is cooled with water. For this reason, the temperature of the part which touches a skid falls in a slab. This part is called a skid mark.
  • Rolling load disturbance [Delta] P D may be considered synchronous with periodic disturbance to skid marks. During rolling, the rolling speed changes. Therefore, the period of the rolling load disturbance [Delta] P D varies with time. Rolling load disturbance [Delta] P D, the upper work roll 2a, a lower work roll 2b, the upper backup roll 3a, changes at a constant period with respect to the rotation angle phi 2 (0 ° to 360 °) of the lower backup roll 3b.
  • w is approximated by a k-th order Fourier series. Specifically, w is expressed by the following equation (24).
  • N pieces of data obtained from the rolled material 13 are applied to the equation (25), N simultaneous equations are obtained.
  • variables represented by vectors and matrices are defined below.
  • the data set of ⁇ P is a column vector Y 2 including elements of ⁇ P ACT .
  • the data set [ ⁇ S I cos ⁇ 2 sin ⁇ 2 ... Cos (k ⁇ 2 ) sin (k ⁇ 2 )] is a column vector including N ⁇ S ACT elements, and an N-row 1-column matrix including only one element.
  • I NX1 be an N ⁇ 2k matrix X 2 containing sin and cos values of N ⁇ 2 .
  • [-MQ / (M + Q) a w0 a w1 b w1 ... A wk b wk ] T appearing in the first term on the right side of the equation (25) is defined as a column vector ⁇ 2 .
  • equation (26) is solved by the least square method.
  • the least square solution of ⁇ 2 is expressed by the following equation (27).
  • the plastic coefficient identification device 20 calculates the plastic coefficient Q ID using equation (27). At this time, the mill constant M is selected from the mill constant M ID or the mill constant M MES .
  • the plastic coefficient Q is identified when a certain number of data is accumulated.
  • the plastic coefficient identification device 20 has a table of plastic coefficients using the rolling stand number, the steel type, the sheet thickness classification, and the temperature range as classification indices. Each cell in the table is called a lot. Each lot is associated with the following information (A) to (D).
  • the plastic coefficient identification device 20 calculates the plastic coefficient Q ID at the following timing (a) or timing (b) using the information (A) to (D).
  • the plasticity coefficient Q ID is calculated when a certain number or more of new data is accumulated.
  • the plastic coefficient Q ID is calculated for the data of the lot.
  • the engineer may make an appropriate determination by looking at the number of accumulated data. If the number of data exceeds a certain number, the plasticity coefficient Q ID may be automatically calculated.
  • b is a smoothing gain. b is set to a value from 0 to 1. When b is increased, the plastic coefficient Q [1, 2, 3, 4] (raw) is easily reflected in the new mill constant.
  • FIG. 7 is a diagram for explaining a table of plastic coefficients possessed by the plastic coefficient identification device of the sheet thickness control device of the rolling mill according to Embodiment 1 of the present invention.
  • FIG. 8 is a diagram for explaining an estimation result of roll eccentric disturbance by the sheet thickness control device of the rolling mill in Embodiment 1 of the present invention.
  • FIG. 9 is a diagram for explaining an estimation result of the rolling load disturbance by the thickness control device of the rolling mill according to Embodiment 1 of the present invention.
  • the estimated value of the roll eccentric disturbance substantially coincides with the actual disturbance value.
  • the estimated value of the rolling load disturbance substantially coincides with the actual disturbance value. For this reason, the mill constant M ID and the plasticity coefficient Q ID are accurately calculated.
  • the plastic coefficient identification device 20 identifies the plastic coefficient of the rolled material 13 based on the actual rolling load value, the actual roll gap value, and the mill constant of the rolling stand to be operated. . For this reason, the plasticity coefficient of the rolling material 13 can be identified accurately.
  • the mill constant identification device 19 identifies the mill constant of the rolling stand based on the rolling load actual value, the roll gap actual value, and the thickness of the rolled material on the downstream side of the rolling stand. To do. For this reason, the mill constant of the rolling stand can be accurately identified.
  • the mill constant identification device 19 identifies the mill constant of the rolling stand based on the rotation position of the rolling roll of the rolling stand. Specifically, the mill constant identification device 19 calculates the mill constant using equation (18). For this reason, the mill constant of the rolling stand can be identified more accurately.
  • the mill constant identification device 19 identifies the mill constant each time data of one rolled material 13 is obtained for the rolling stand, and smoothes the mill constant identified in the past.
  • the mill constant identification device 19 makes the ratio using the latest identification data higher than usual. For this reason, the mill constant of the rolling stand can be identified more accurately.
  • the plastic coefficient identification device 20 identifies the plastic coefficient of the rolled material 13 based on the mill constant obtained by the kiss roll test. For this reason, the plasticity coefficient of the rolling material 13 can be identified more accurately.
  • the plastic coefficient identification device 20 identifies the plastic coefficient of the rolled material 13 based on the rotational position of the rolling roll of the rolling stand. Specifically, the plastic coefficient identification device 20 calculates the plastic coefficient using equation (26). For this reason, the plasticity coefficient of the rolling material 13 can be identified more accurately.
  • the plastic coefficient identification device 20 identifies the plastic coefficient of the rolled material 13 using data collected in advance. For this reason, the plasticity coefficient of the rolling material 13 is computable using the past data.
  • the plastic coefficient identification device 20 identifies the plastic coefficient of the rolled material 13 when data is accumulated in a preset number for each lot divided by the same or similar steel type, sheet thickness, and rolling temperature range. . For this reason, the plasticity coefficient of the rolling material 13 can be calculated more accurately.
  • the plastic coefficient identification device 20 identifies the plastic coefficient of the rolled material 13 every time data is accumulated in lots divided by the same or similar steel type, sheet thickness, and rolling temperature range. For this reason, the plasticity coefficient of the rolling material 13 can be corrected with the latest data.
  • the thickness gauge 12 is not provided on the downstream side of the rolling stand, the thickness of the rolled material 13 on the exit side of the rolling stand may be obtained using a constant mass flow rule.
  • the mass flow constant law is expressed by the following equation (29).
  • the subscript X corresponds to the position immediately below the thickness gauge 12 when it is assumed that the thickness gauge 12 is provided.
  • the subscript i corresponds to the rolling stand number.
  • h is the thickness of the rolled material 13.
  • V is the speed of the rolled material 13.
  • f is the advanced rate. The advanced rate f is calculated from the rolling model.
  • V Ri is measured from the peripheral speed of the rolling roll of the rolling stand.
  • FIG. FIG. 10 is a main part of a control block diagram of a sheet thickness control device for a rolling mill in Embodiment 2 of the present invention.
  • symbol is attached
  • Thickness controller 9 of the second embodiment to improve the control performance by using a roll eccentricity disturbance [Delta] S D identified.
  • the roll gap operating means 10 the roll eccentricity disturbance [Delta] S D identified adjusting the roll gap in the opposite direction. By this adjustment, the roll eccentric disturbance is canceled out.
  • the roll gap operating means 10 adjusts the roll gap of the rolling stand so as to reduce the influence of roll eccentric disturbance. For this reason, the plate
  • the plate thickness control apparatus of Embodiment 1 and 2 may be applied to mills other than a 4Hi mill.
  • the plate thickness control device may be applied to a 6Hi mill in which an intermediate roll is added to a 4Hi mill.
  • the sheet thickness control device for a rolling mill according to the present invention can be used for accurately identifying the plasticity coefficient of a rolled material.

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Abstract

　L'invention porte sur un dispositif de réglage d'épaisseur de tôle pour un laminoir, dans lequel le coefficient plastique du matériau soumis au laminage peut être identifié avec précision. À cet effet, le dispositif de réglage d'épaisseur de tôle pour un laminoir est doté d'un dispositif d'identification de coefficient plastique permettant d'identifier le coefficient plastique représentant la dureté du matériau soumis au laminage sur la base de la constante du train, de l'écartement des cylindres et de la pression de laminage réelle d'une cage de laminage en train de fonctionner. Dans cette configuration, le coefficient plastique du matériau soumis au laminage est identifié sur la base de données obtenues dans la cage de laminage en train de fonctionner. Par conséquent, le coefficient plastique du matériau soumis au laminage peut être identifié avec précision.
PCT/JP2013/073051 2013-08-28 2013-08-28 Dispositif de réglage d'épaisseur de tôle pour laminoir WO2015029171A1 (fr)

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CN201380079178.3A CN105492133B (zh) 2013-08-28 2013-08-28 轧机的板厚控制装置
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WO2019053826A1 (fr) * 2017-09-13 2019-03-21 東芝三菱電機産業システム株式会社 Dispositif de calcul d'un modèle mathématique et dispositif de commande pour ligne de laminage
TWI670124B (zh) * 2018-11-12 2019-09-01 中國鋼鐵股份有限公司 鋼帶厚度控制方法
KR102337326B1 (ko) * 2019-08-28 2021-12-08 도시바 미쓰비시덴키 산교시스템 가부시키가이샤 롤 상태 모니터 장치
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KR20160003863A (ko) 2016-01-11
TWI571328B (zh) 2017-02-21
JPWO2015029171A1 (ja) 2017-03-02
KR101767810B1 (ko) 2017-08-23
JP6028871B2 (ja) 2016-11-24

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