CN104722584A - Apparatus for controlling the width of multi-stand rolling mill and method for the same - Google Patents

Apparatus for controlling the width of multi-stand rolling mill and method for the same Download PDF

Info

Publication number
CN104722584A
CN104722584A CN201410812330.0A CN201410812330A CN104722584A CN 104722584 A CN104722584 A CN 104722584A CN 201410812330 A CN201410812330 A CN 201410812330A CN 104722584 A CN104722584 A CN 104722584A
Authority
CN
China
Prior art keywords
width
value
stress value
stress
roll stand
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CN201410812330.0A
Other languages
Chinese (zh)
Other versions
CN104722584B (en
Inventor
金成炫
李德万
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Posco Holdings Inc
Original Assignee
Posco Co Ltd
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.)
Filing date
Publication date
Application filed by Posco Co Ltd filed Critical Posco Co Ltd
Publication of CN104722584A publication Critical patent/CN104722584A/en
Application granted granted Critical
Publication of CN104722584B publication Critical patent/CN104722584B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
    • 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
    • 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
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • 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
    • B21B38/006—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring temperature
    • 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

Abstract

An apparatus for controlling the width of a multi-stand rolling mill and a method for the same are provided. The width control apparatus comprises: a measuring unit for measuring a steel sheet penetrating multiple roll stands so as to generate a measurement temperature value corresponding the surface temperature of the steel sheet; and a tension control unit for calculating a reference stress value corresponding to each of the multiple roll stands by respectively using target width variables set for the multiple roll stands, calculating final target stress values by using the measurement temperature value to compensate the reference stress values, and adjusting the tension of the roll stands according to the final target stress values.

Description

For controlling the apparatus and method of the width of multi-set of rolling mill
The cross reference of related application
This application claims the rights and interests enjoying in the 10-2013-0161534 korean patent application that on December 23rd, 2013 submits to Korean Intellectual Property Office, its disclosure is included in herein by the mode quoted as proof.
Technical field
Present disclosure relates in general to the apparatus and method of the width for controlling multi-set of rolling mill (multi-stand rollingmill), more specifically, relate to can come promptly in response to the temperature of steel plate or the change of width living through the operation of rolling and accurately control the width of this steel plate, for controlling the apparatus and method of multi-set of rolling mill width.
Background technology
Generally, in continuous print casting process and the operation of rolling, molten steel is formed slab, and then when this slab of rolling continuously and this slab is formed hot rolled steel plate.In mini steel plant, before passing through finish rolling machine rolled slab, the width of slab should in preset range.For this reason, by the width control system of slab to when by target width during this rolling machine rolling.But, due to the some questions in continuous casting process, the width of slab can be changed.The slab that width changes in continuous casting process can experience larger change width when again standing the operation of rolling, and this is that other rolling factors owing to comprising temperature deviation cause.Because the deviation having lived through the width of the slab of the operation of rolling exceeds the scope of controllable width difference in finish rolling machine, so be necessary at the width of the front control plate base by the rolling of finish rolling machine.
By convention, when the tension force applied by multiple rolling machine maintains constant, the operation of rolling is performed.But this is not suitable for the width adjusting slab changeably, because there is sizable change of temperature and the width affected widely by many factors in the operation of rolling of mini steel plant.
[correlation technique file]
(patent document 1) Korean Patent public publication No.10-2001-0061656 (2001.07.07)
Summary of the invention
An exemplary in present disclosure can be provided for the apparatus and method controlling multi-set of rolling mill width, and these apparatus and method can be come promptly in response to the temperature of steel plate or the change of width living through the operation of rolling and accurately control the width of this steel plate.
According to an exemplary of present disclosure, width control system device for the multi-set of rolling mill tension force that can be used to by adjusting multiple roll stands that this multi-set of rolling mill comprises controls by the width of the steel plate of this multi-set of rolling mill rolling, and this width control system device can comprise: measuring unit, measure the steel plate through described multiple roll stand, thus generate the measuring tempeature value of the surface temperature corresponding to this steel plate; And tension control units, use the target width variable for described multiple roll stand is arranged respectively, calculate each Reference Stress value corresponded in described multiple roll stand, and repay this Reference Stress value by using this measuring tempeature value complement and calculate final goal stress value, thus adjust the tension force of this roll stand according to this final goal stress value.
This measuring unit also can generate corresponding at least one in the stress of steel plate and the measurement stress value of width and measurement width value, and this tension control units compensates this Reference Stress value to calculate this final goal stress value by further using any one in this measurement stress value and this measurement width value.
This measuring unit can comprise: temperature sensor unit, measures the surface temperature of the steel plate through described multiple roll stand, thus generates this measuring tempeature value; Stress measurement unit, measures the stress of the steel plate through described multiple roll stand, thus generates this measurement stress value; And width measure unit, measure the width of the steel plate through described multiple roll stand, thus generate this measurement width value.
This tension control units uses equation below can calculate this Reference Stress value,
σ i W = K 1 Exp ( K 2 Δ W i ) + K 3
Wherein Δ W irepresent the target width variable at i-th roll stand place, represent the Reference Stress value being used for this i-th roll stand, and K 1, K 2and K 3represent respective coefficient.
This tension control units can error of calculation offset with by the error between this measurement width value of feedback control compensation and this target width value, and then use this error compensation value can reset this Reference Stress value.
This tension control units uses equation below accounting temperature can compensate stress value,
σ i T = K 4 Exp ( K 5 T ) + K 6
Wherein T represents this measuring tempeature value, represent that this temperature-compensating stress value is to compensate the change width of the steel plate changed according to this measuring tempeature value, and K 4, K 5and K 6represent respective coefficient, and then can compensate this Reference Stress value based on this temperature-compensating stress value.
This tension control units uses this measurement stress value can calculate stress ratio for described multiple roll stand, and can calculate described multiple roll stand and maintain preset stress than required distribution of compensation stress value.
This tension control units use equation below can calculate each required STRESS VARIATION amount in described multiple roll stand,
Δ σ i = C i Σ σ i Σ C i - σ i
Wherein C irepresent the preset stress ratio being used for i-th roll stand, σ irepresent the measurement stress value at this i-th roll stand place, and Δ σ irepresent the STRESS VARIATION amount being used for this i-th roll stand, and then use this STRESS VARIATION amount can derive distribution of compensation stress value.
This tension control units uses equation below can calculate this final goal stress value,
σ i * = K σ i W σ i T σ i C Or σ i * = ( K + σ i W + σ i T + σ i C )
Wherein represent the final goal stress value being used for this i-th roll stand, represent the Reference Stress value being used for i-th roll stand, represent temperature-compensating stress value, for the change width compensating the steel plate changed according to this measuring tempeature value, represent the distribution of compensation stress value be distributed on this i-th roll stand, and K represents coefficient.
According to another exemplary of present disclosure, a kind of width control method for multi-set of rolling mill, this width control method tension force be used to by adjusting multiple roll stands that this multi-set of rolling mill comprises controls by the width of the steel plate of this multi-set of rolling mill rolling, this width control method can comprise: feedforward control step, be used in the target width variable of each middle setting in described multiple roll stand, calculate the Reference Stress value of each steel plate corresponded in described multiple roll stand; Temperature-compensating step, measures the surface temperature through each steel plate in this roll stand, and accounting temperature compensates stress value to compensate the change width of the steel plate changed according to the surface temperature of this steel plate; FEEDBACK CONTROL step, generated by the width measuring the steel plate of rolling in this multi-set of rolling mill and measure width value, error of calculation offset with by the error between this measurement width value of feedback control compensation and this target width value, and uses this error compensation value to reset this Reference Stress value; Stress distribution step, generated by the stress measuring the steel plate between described multiple roll stand and measure stress value, and use the calculating of this measurement stress value for the distribution of compensation stress value of described multiple roll stand, make described multiple roll stand maintain preset stress ratio; And tension control step, use this Reference Stress value, this temperature-compensating stress value and this distribution of compensation stress value to calculate final goal stress value, and adjust the magnitude of the tension force being applied to steel plate by roll stand according to this final goal stress value.
Accompanying drawing explanation
The above and other embodiment of present disclosure, feature and other advantages will be more clearly understood from detailed description with the accompanying drawing below, wherein:
Fig. 1 illustrates the block diagram according to the width control system device of the multi-set of rolling mill of the exemplary of in present disclosure;
Fig. 2 A and 2B illustrates the curve map according to the stress value of the steel plate in the multi-set of rolling mill of the exemplary in present disclosure; And
Fig. 3 illustrates the flow chart according to the width control method of the multi-set of rolling mill of the exemplary in present disclosure.
Detailed description of the invention
Hereinafter, the present invention is described in detail with reference to the accompanying drawings.By the exemplary provided in the present invention to make those skilled in the art complete understanding the present invention more.In the following description, if determine that the detailed description of known function related to the present invention or configuration makes theme of the present invention unclear, then this detailed description is omitted.Reference number identical in whole description represents identical element.
In addition, will understand, when element be called as be connected to another element time, they can be each other " directly connect ", and " are indirectly connected " each other by the element be between arranged in therebetween in addition.In addition, the implication of " comprising element " does not get rid of the possibility also comprising another element, except as otherwise noted.
Fig. 1 illustrates the block diagram according to the width control system device of the multi-set of rolling mill of the exemplary of in present disclosure.
With reference to Fig. 1, width control system device according to the multi-set of rolling mill of the exemplary in present disclosure can comprise temperature sensor unit (t1 to tn), stress measurement unit (s1 to sn), width measure unit w, and tension control units 20.
Hereinafter, with reference to Fig. 1, the width control system device according to the multi-set of rolling mill of the exemplary in present disclosure will be described.
Temperature sensor unit t1 to tn can measure through the surface temperature of multiple roll stand 11 to the steel plate b of 1n+1, thus generates measuring tempeature value.As shown in fig. 1, temperature sensor unit t1 to tn can be arranged between multiple roll stand 11 to 1n+1, and can measure the surface temperature of the steel plate b passed between multiple roll stand 11 to 1n+1, thus generates measuring tempeature value.At this, each in temperature sensor unit t1 to tn uses any component, as long as this component can measure the temperature of steel plate b.The measuring tempeature value measured by temperature sensor unit t1 to tn can be imported in tension control units 20.
Stress measurement unit s1 to sn can measure through the tension force of multiple roll stand 11 to the steel plate b of 1n+1, thus generates measurement stress value.As shown in Figure 1, stress measurement unit s1 to sn can be arranged between multiple roll stand 11 to 1n+1, and can measure the stress of the steel plate b passed between multiple roll stand 11 to 1n+1, thus generates measurement stress value.At this, each in stress measurement unit s1 to sn uses any component, as long as this component can measure the stress of steel plate b.The measurement stress value measured by stress measurement unit s1 to sn can be imported in tension control units 20.
Width measure unit w can measure through the width of multiple roll stand 11 to the steel plate b of 1n+1, thus generates measurement width value.Especially, width measure unit w can measure the final width that steel plate b reduces in multi-set of rolling mill 10.As shown in Figure 1, width measure unit w can be positioned at the final output of multi-set of rolling mill 10, and can measure the final width of the steel plate b of rolling in multi-set of rolling mill 10.That is, it is possible that the final width by measuring steel plate b generates final width value, and measures width value or final width value can be imported in tension control units 20.At this, width measure unit w can measure the width of steel plate b by graphics processing unit (such as, video camera).In addition, any component all can be used as width measure unit w, as long as this component can measure the width of steel plate b.
At this, the width control system device of multi-set of rolling mill can comprise measuring unit, and this measuring unit has at least one in temperature sensor unit t1 to tn, stress measurement unit s1 to sn and width measure unit w.That is, this measuring unit is by measuring through the steel plate of multiple roll stand, can generate corresponding to the surface temperature of steel plate, stress and width measuring tempeature value, measure stress value and measure in width value at least one.
Tension control units 20 adjustable roll stand 11 to each tension force in 1n+1, thus allows the width coupling preset target width value of the steel plate b produced in multi-set of rolling mill 10.More specifically, tension control units 20 can be arranged corresponding to roll stand 11 to each Reference Stress value in 1n+1, and according to the change width compensate for reference stress value of the variations in temperature of steel plate b and steel plate b, thus can calculate final goal stress value.Subsequently, tension control units 20 adjustable roll stand 11 to each tension force in 1n+1, thus allows measurement stress value to meet final goal stress value.
First, tension control units 20 can use as roll stand 11 calculates to the target width variograph of each setting in 1n+1 each Reference Stress value corresponded in multiple roll stand.At this, target width variable can be configured to correspond to the target width variable for steel plate b.More specifically, tension control units 20 can use equation below to calculate this Reference Stress value,
σ i W = K 1 Exp ( K 2 Δ W i ) + K 3
Wherein Δ W irepresent the target width variable at i-th roll stand place, represent the Reference Stress value being used for i-th roll stand, and K 1﹑ K 2and K 3represent respective coefficient.Therefore, the form of exponential function target width variable Δ W and Reference Stress value σ can be represented w, as shown in Figure 2 A.
At this, equation below can be used to calculate target width variable Δ W i, in this equation, W irepresent the width value of steel plate b that is that measure at i-th roll stand place or prediction, and represent the target width value of the steel plate b be used at i-th roll stand place.In the case, W ieach width measure unit by additionally arranging between roll stand is directly measured, or can predict from final width value.At this, for Δ W i, W i, and measurement unit can be millimeter (mm).
For the Reference Stress value calculated, tension control units 20 can perform FEEDBACK CONTROL.More specifically, can feed back and correspond to the final width value of the final width of the steel plate b of rolling in multi-set of rolling mill 10, and can be steel plate and calculate error between final width value and target width value.At this, if this error is non-vanishing, then the error compensation value using the feedback control algorithm error of calculation to become zero place is possible, and in addition, it is possible for using this error compensation value to reset Reference Stress value.Such as, the STRESS VARIATION amount of error required for zero is made to be calculated as error compensation value.At this, by preset weight coefficient or anticipation function, error of calculation offset can be given respective roll stand, and then maybe the error compensation value got be deducted from each Reference Stress value can reset Reference Stress value by the error compensation value got being added to each Reference Stress value.Alternatively, the changing value of target width variable can be calculated based on error compensation value.That is, by target width variable being added to this variable quantity or target width variable being deducted from this variable quantity to reset target width variable be possible, and then reset that to correspond to the Reference Stress value resetting target width variable be possible.Therefore, tension control units 20 can perform and control to make the final width value of steel plate b by meeting target width value for the FEEDBACK CONTROL of final width value.
In addition, in view of the change width of steel plate b depends on temperature, tension control units 20 can compensate for reference stress value.That is, because the width of steel plate b can according to temperature change, so can according to the temperature compensated reference stress value of steel plate b.More specifically, tension control units 20 can use equation accounting temperature below to compensate stress value, and serviceability temperature can compensate stress value compensate for reference stress value.In this equation, T represents measuring tempeature value, represent temperature-compensating stress value, this temperature-compensating stress value compensates the change width of the steel plate b changed according to this measuring tempeature value, and K 4﹑ K 5and K 6corresponding to respective coefficient.Therefore, tension control units 20 serviceability temperature can compensate stress value compensate for reference stress value, therefore according to the change width of the temperature reply steel plate b of steel plate b.At this, the form of exponential function as shown in Figure 2 B can represent the temperature of steel plate b and correspond to the temperature-compensating stress value of temperature of steel plate b.At this, the measurement unit for T can be degree Celsius (DEG C).
In addition, in order to prevent stress from concentrating in specific roll stand, can at the roll stand 11 be included in multi-set of rolling mill 10 to each middle preset stress ratio in 1n+1.In the stress being applied to whole multi-set of rolling mill 10, stress ratio can be represented as the ratio of any one stress be applied in described roll stand.But when the operation of rolling for steel plate b is carried out, stress can concentrate in specific roll stand undesirably, different from default stress ratio.Under these circumstances, need concentrated stress distribution to each roll stand.Therefore, tension control units 20 can be used the measurement stress value measured by stress measurement unit s1 to sn to calculate multiple roll stand 11 and maintain preset stress than required distribution of compensation stress value to 1n+1.
More specifically, tension control units 20 can use equation below to calculate each required STRESS VARIATION amount in multiple roll stand, and this STRESS VARIATION amount can be used to derive distribution of compensation stress value.At this, C irepresent the stress ratio of i-th roll stand, σ irepresent the measurement stress value at i-th roll stand place, and Δ σ irepresent the STRESS VARIATION amount being used for i-th roll stand.At this, distribution of compensation stress value can be derived by proportional, integral control algolithm is applied to STRESS VARIATION amount.At this, C ican dimensionless unit be had, and for σ imeasurement unit can be megapascal (MPa) (Mpa).
Tension control units 20 can use measuring tempeature value, at least one measurement in stress value and measurement width value is carried out compensate for reference stress value, and can be calculated final goal stress value by compensate for reference stress value.Such as, it is possible for using equation below to calculate final goal stress value, or at this, represent the final goal stress value being used for i-th roll stand, represent the Reference Stress value being used for i-th roll stand, represent that temperature-compensating stress value is to compensate the change of the width of the steel plate changed according to measuring tempeature value, represent the distribution of compensation stress value being assigned to i-th roll stand, and K represents coefficient.As discussed above, measuring tempeature value accounting temperature can be used to compensate stress value, and measurement stress value dispensed can be used to compensate stress value.In addition, because by FEEDBACK CONTROL with measuring width value compensate for reference stress value, so tension control units 20 can compensate for reference stress value and then use measuring tempeature value, measure stress value and at least one measurement in width value calculates final goal stress value.
At this, the measurement unit for K can be megapascal (MPa) (Mpa).If use equation calculate final goal stress value, then and can have dimensionless unit, K1, K2, K3, K4 and K6 can have dimensionless unit, and can be 1/ DEG C for the measurement unit of K5.If use equation calculate final goal stress value, then and measurement unit can be MPa, K1, the measurement unit of K3, K4 and K6 can be the measurement unit of MPa, K2 can be 1/MPa, and can be 1/ DEG C for the measurement unit of K5.
After this, by adjusting speed or the equipment of use (such as looper equipment (looper)) of roll stand, tension control units 20 can control the tension force of roll stand.Therefore, it allows multiple roll stand 11 to meet final goal stress value to 1n+1.
Fig. 3 illustrates the flow chart according to the width control method of the multi-set of rolling mill of the exemplary of in present disclosure.
With reference to Fig. 3, the width control method according to the multi-set of rolling mill of the exemplary in present disclosure can comprise: feedforward control step S10, temperature-compensating step S20, FEEDBACK CONTROL step S30, stress distribution step S40, and tension control step S50.
Hereinafter, with reference to Fig. 3, the width control method according to the multi-set of rolling mill of the exemplary in present disclosure is described.
At feedforward control step S10 place, use be arranged on multiple roll stand each in target width variable can calculate Reference Stress value corresponding to each steel plate in multiple roll stand.At this, if the width being supplied to the steel plate in multi-set of rolling mill changes or change in the target width value of steel plate, then it is possible for promptly resetting Reference Stress value by correction target width variance, thus makes it possible to rapid response.More specifically, at feedforward control step S10 place, use equation below can computing reference stress value.In this equation, Δ W irepresent the target width variable at i-th roll stand place, represent the Reference Stress value being used for i-th roll stand, and K 1﹑ K 2and K 3represent respective coefficient.
Subsequently, at temperature-compensating step S20 place, the surface temperature through each steel plate in roll stand can be measured, and the temperature-compensating stress value of the change of the width for compensating the steel plate changed according to the surface temperature of steel plate can be calculated.Because the width of steel plate can change according to the surface temperature of steel plate, so temperature-compensating stress value can be calculated and then be used to tackle depend on that the steel plate width of steel billet temperature changes.More specifically, at temperature-compensating step S20 place, use equation below accounting temperature can compensate stress value, and serviceability temperature compensation stress value can compensate for reference stress value.In this equation, T represents the temperature value of measurement, represent temperature-compensating stress value, and K 4﹑ K 5and K 6corresponding to respective coefficient.
At FEEDBACK CONTROL step S30 place, by measure in multi-set of rolling mill the width of the steel plate of rolling can measure measurement width value, and the error compensation value of the error between width value and target width value can be measured by calculation compensation by FEEDBACK CONTROL, and use error offset can reset Reference Stress value.More specifically, can be steel plate calculate error between final width value and target width value by feeding back final width value.At this, the error compensation value of error of calculation vanishing place is possible, and use error offset replacement Reference Stress value is possible.Such as, the change of the target width variable of error required for zero or STRESS VARIATION amount is made to be calculated as error compensation value.
At stress distribution step 40 place, measurement stress value can be generated by the stress measuring the steel plate between multiple roll stand.Subsequently, using measurement stress value to carry out dispensed compensation stress value makes multiple roll stand maintenance preset stress ratio be possible.That is, in order to prevent stress from concentrating in specific roll stand, can reset for each stress ratio in roll stand.Can be each STRESS VARIATION amount calculating maintenance stress ratio and should distribute in multiple roll stand.More specifically, equation is below used can calculated stress variable quantity, and applied stress variable quantity can derive distribution of compensation stress value.At this, C irepresent the stress ratio of i-th roll stand, σ irepresent the measurement stress value at i-th roll stand place, and Δ σ irepresent the STRESS VARIATION amount being used for i-th roll stand.Subsequently, at stress distribution step S40 place, by proportional, integral control algolithm is applied to STRESS VARIATION amount, distribution of compensation stress value can be derived.
At tension control step S50 place, use Reference Stress value, temperature-compensating stress value and distribution of compensation stress value can calculate final goal stress value, and be possible according to the magnitude that the adjustment of final goal stress value puts on the tension force of steel plate by roll stand.Such as, at tension control step S50 place, use equation below or final goal stress value can be calculated.At this, represent the final goal stress value being used for i-th roll stand, represent the Reference Stress value being used for i-th roll stand, represent that temperature-compensating stress value is to compensate the change width of the steel plate changed according to measuring tempeature value, represent the distribution of compensation stress value being assigned to i-th roll stand, and K represents coefficient.Subsequently, at tension control step S50 place, the tension force of the speed or control roll stand that use equipment (such as, looper equipment) to adjust roll stand meets final goal stress value to allow multiple roll stand.
As illustrated above, according to the exemplary in present disclosure, apparatus and method for controlling the width of multi-set of rolling mill accurately and promptly can control the width of steel plate in response to disturbance (such as, the temperature of steel plate or the change of width).
Although illustrate and describe exemplary above, those skilled in the art will understand, when not departing from the scope of the invention that claims limit, can make remodeling and variant.

Claims (10)

1. the width control system device for multi-set of rolling mill, the described width control system device tension force be used to by adjusting multiple roll stands that described multi-set of rolling mill comprises controls by the width of the steel plate of described multi-set of rolling mill rolling, and described width control system device comprises:
Measuring unit, measures the steel plate through described multiple roll stand, thus generates at least one the measuring tempeature value of the surface temperature corresponding to described steel plate; And
Tension control units, use the target width variable for described multiple roll stand is arranged respectively, calculate each Reference Stress value corresponded in described multiple roll stand, and repay described Reference Stress value by using described measuring tempeature value complement and calculate final goal stress value, thus adjust the tension force of described roll stand according to described final goal stress value.
2. width control system device according to claim 1, wherein said measuring unit also generates corresponding at least one in the stress of described steel plate and the measurement stress value of width and measurement width value, and described tension control units compensates described Reference Stress value to calculate described final goal stress value by further using any one in described measurement stress value and described measurement width value.
3. width control system device according to claim 2, wherein said measuring unit comprises:
Temperature sensor unit, measures the surface temperature of the steel plate through described multiple roll stand, thus generates described measuring tempeature value;
Stress measurement unit, measures the stress of the steel plate through described multiple roll stand, thus generates described measurement stress value; And
Width measure unit, measures the width of the steel plate through described multiple roll stand, thus generates described measurement width value.
4. width control system device according to claim 1, wherein said tension control units uses equation below to calculate described Reference Stress value,
σ i W = K 1 Exp ( K 2 Δ W i ) + K 3
Wherein Δ W irepresent the target width variable at i-th roll stand place, represent the Reference Stress value being used for described i-th roll stand, and K 1, K 2and K 3represent respective coefficient.
5. width control system device according to claim 1, then wherein said tension control units error of calculation offset with the error by measuring described in feedback control compensation between width value and described target width value, and uses described error compensation value to reset described Reference Stress value.
6. width control system device according to claim 1, wherein said tension control units uses equation accounting temperature below to compensate stress value,
σ i T = K 4 Exp ( K 5 T ) + K 6
Wherein T represents described measuring tempeature value, represent that described temperature-compensating stress value is to compensate the change width of the steel plate changed according to described measuring tempeature value, and K 4, K 5and K 6represent respective coefficient, and then compensate described Reference Stress value based on described temperature-compensating stress value.
7. width control system device according to claim 2, wherein said tension control units uses the calculating of described measurement stress value for the stress ratio of described multiple roll stand, and calculates described multiple roll stand maintenance preset stress than required distribution of compensation stress value.
8. width control system device according to claim 7, wherein said tension control units uses each required STRESS VARIATION amount in the described multiple roll stand of the calculating of equation below,
Δσ i = C i Σ σ i Σ C i - σ i
Wherein C irepresent the preset stress ratio being used for i-th roll stand, σ irepresent the measurement stress value at described i-th roll stand place, and Δ σ irepresent the STRESS VARIATION amount being used for described i-th roll stand, and then use described STRESS VARIATION amount to derive distribution of compensation stress value.
9. width control system device according to claim 1, wherein said tension control units uses equation below to calculate described final goal stress value,
σ i * = K σ i W σ i T σ i C Or σ i * = ( K + σ i W + σ i T + σ i C )
Wherein represent the final goal stress value being used for described i-th roll stand, represent the Reference Stress value being used for i-th roll stand, represent that temperature-compensating stress value is for the change width compensating the steel plate changed according to described measuring tempeature value, represent the distribution of compensation stress value be distributed on described i-th roll stand, and K represents coefficient.
10. the width control method for multi-set of rolling mill, the described width control method tension force be used to by adjusting multiple roll stands that described multi-set of rolling mill comprises controls by the width of the steel plate of described multi-set of rolling mill rolling, and described width control method comprises:
Feedforward control step, is used in the target width variable of each middle setting of described multiple roll stand, calculates the Reference Stress value of each steel plate corresponded in described multiple roll stand;
Temperature-compensating step, measures the surface temperature through each steel plate in described roll stand, and accounting temperature compensates stress value to compensate the change width of the steel plate changed according to the surface temperature of described steel plate;
FEEDBACK CONTROL step, generated by the width measuring the steel plate of rolling in described multi-set of rolling mill and measure width value, error of calculation offset is with the error by measuring described in feedback control compensation between width value and described target width value, and use error offset resets described Reference Stress value;
Stress distribution step, generated by the stress measuring the steel plate between described multiple roll stand and measure stress value, and use the calculating of described measurement stress value for the distribution of compensation stress value of described multiple roll stand, make described multiple roll stand maintain preset stress ratio; And
Tension control step, is used described Reference Stress value, described temperature-compensating stress value and described distribution of compensation stress value to calculate final goal stress value, and adjusts the magnitude of the tension force being applied to steel plate by roll stand according to described final goal stress value.
CN201410812330.0A 2013-12-23 2014-12-23 Apparatus and method for controlling the width of multi-stand rolling mill Active CN104722584B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2013-0161534 2013-12-23
KR1020130161534A KR101536461B1 (en) 2013-12-23 2013-12-23 Apparatus for controlling slab width and method for the same

Publications (2)

Publication Number Publication Date
CN104722584A true CN104722584A (en) 2015-06-24
CN104722584B CN104722584B (en) 2017-04-12

Family

ID=53447339

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410812330.0A Active CN104722584B (en) 2013-12-23 2014-12-23 Apparatus and method for controlling the width of multi-stand rolling mill

Country Status (2)

Country Link
KR (1) KR101536461B1 (en)
CN (1) CN104722584B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017206296A1 (en) * 2016-06-02 2017-12-07 广东基泰智能设备有限公司 Lithium strip temperature control calendering apparatus
CN114906659A (en) * 2022-06-15 2022-08-16 山信软件股份有限公司 Compression roller control device and method based on stepless adjustment

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018117486A1 (en) * 2016-12-19 2018-06-28 주식회사 포스코 Width control device of multi-stand rolling mill and method for controlling width thereof

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04100620A (en) * 1990-08-16 1992-04-02 Sumitomo Metal Ind Ltd Method for controlling width of metal plate in hot continuous rolling
JPH0615324A (en) * 1992-06-30 1994-01-25 Nkk Corp Method for controlling width of strip in rolling mill
JPH0899108A (en) * 1994-09-29 1996-04-16 Kawasaki Steel Corp Method for controlling width in hot rolling
JPH08192210A (en) * 1995-01-17 1996-07-30 Sumitomo Metal Ind Ltd Method for controlling width in rolling mill
JPH10211513A (en) * 1997-01-28 1998-08-11 Toshiba Corp Device for controlling width in continuous rolling mill
US6227021B1 (en) * 1999-04-27 2001-05-08 Kabushiki Kaisha Toshiba Control apparatus and method for a hot rolling mill
CN102773264A (en) * 2011-05-11 2012-11-14 株式会社日立制作所 Tension control device of hot mill and control method
CN103286141A (en) * 2012-02-27 2013-09-11 宝山钢铁股份有限公司 Automatic control method of width of hot continuous rolling and finish rolling strip steel

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04100620A (en) * 1990-08-16 1992-04-02 Sumitomo Metal Ind Ltd Method for controlling width of metal plate in hot continuous rolling
JPH0615324A (en) * 1992-06-30 1994-01-25 Nkk Corp Method for controlling width of strip in rolling mill
JPH0899108A (en) * 1994-09-29 1996-04-16 Kawasaki Steel Corp Method for controlling width in hot rolling
JPH08192210A (en) * 1995-01-17 1996-07-30 Sumitomo Metal Ind Ltd Method for controlling width in rolling mill
JPH10211513A (en) * 1997-01-28 1998-08-11 Toshiba Corp Device for controlling width in continuous rolling mill
US6227021B1 (en) * 1999-04-27 2001-05-08 Kabushiki Kaisha Toshiba Control apparatus and method for a hot rolling mill
CN102773264A (en) * 2011-05-11 2012-11-14 株式会社日立制作所 Tension control device of hot mill and control method
CN103286141A (en) * 2012-02-27 2013-09-11 宝山钢铁股份有限公司 Automatic control method of width of hot continuous rolling and finish rolling strip steel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017206296A1 (en) * 2016-06-02 2017-12-07 广东基泰智能设备有限公司 Lithium strip temperature control calendering apparatus
CN114906659A (en) * 2022-06-15 2022-08-16 山信软件股份有限公司 Compression roller control device and method based on stepless adjustment
CN114906659B (en) * 2022-06-15 2024-03-26 山信软件股份有限公司 Compression roller control device and method based on electrodeless regulation

Also Published As

Publication number Publication date
KR20150073618A (en) 2015-07-01
KR101536461B1 (en) 2015-07-13
CN104722584B (en) 2017-04-12

Similar Documents

Publication Publication Date Title
RU2008139906A (en) METHOD AND INSTALLATION FOR INTEGRATED MONITORING AND CONTROL OF THE STRIP OF THE STRIP AND THE STRIP PROFILE
CN104722584A (en) Apparatus for controlling the width of multi-stand rolling mill and method for the same
KR100685038B1 (en) Thickness control apparatus in rolling mill
JP4323273B2 (en) Load distribution control device for continuous rolling mill
KR20170076866A (en) Apparatus for controlling strip deviation
JP6075178B2 (en) Plate thickness control method and plate thickness control device
JP2006281231A (en) Method for controlling sheet shape in continuous hot finish rolling mill
KR100660204B1 (en) Thickness control apparatus in rolling mill
US20220088656A1 (en) Determination of an adjustment of a roll stand
JP5786844B2 (en) Control method and control device for tandem rolling mill
JP3501982B2 (en) Sheet width control device
KR101879085B1 (en) Apparatus and method for endless hot rolling
JP5705083B2 (en) Thickness control method of rolling mill
KR100660215B1 (en) Apparatus for controlling speed of roll in continuous rolling mill
JPS6224809A (en) Method for controlling sheet width in hot rolling
JPS6124082B2 (en)
JP2002346616A (en) Method for controlling sheet thickness
WO2016143068A1 (en) Plate width control device for rolled material
JPH0957322A (en) Method for controlling plate width in hot rolling
JPH08300024A (en) Method for controlling plate width in hot rolling
JP2023061225A (en) Method and device for controlling steel sheet tension and looper angle during hot rolling
EP4326453A1 (en) Roll steering control systems and methods for tandem mills
JP6091411B2 (en) Thickness control method of rolling mill
KR20140085184A (en) Method of control to roll member, system of controlling to roll member using the same
KR101253817B1 (en) Crown control method and apparatus for stainless steel plate

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CP03 Change of name, title or address

Address after: Seoul, South Kerean

Patentee after: POSCO Holdings Co.,Ltd.

Address before: Gyeongbuk Pohang City, South Korea

Patentee before: POSCO

CP03 Change of name, title or address
TR01 Transfer of patent right

Effective date of registration: 20230517

Address after: Gyeongbuk, South Korea

Patentee after: POSCO Co.,Ltd.

Address before: Seoul, South Kerean

Patentee before: POSCO Holdings Co.,Ltd.

TR01 Transfer of patent right