CN107138537A - A kind of rolled aluminum sheet mill method for controlling thickness using electronic and hydraulic pressing - Google Patents
A kind of rolled aluminum sheet mill method for controlling thickness using electronic and hydraulic pressing Download PDFInfo
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- CN107138537A CN107138537A CN201710429477.5A CN201710429477A CN107138537A CN 107138537 A CN107138537 A CN 107138537A CN 201710429477 A CN201710429477 A CN 201710429477A CN 107138537 A CN107138537 A CN 107138537A
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/02—Transverse dimensions
- B21B2261/04—Thickness, gauge
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Abstract
The present invention principally falls into metal-pressed machine technical field, and in particular to a kind of rolled aluminum sheet mill method for controlling thickness using electronic and hydraulic pressing.First, set most latter two passes power to approach, and after the completion of passes second from the bottom, keep roll gap constant, Electro-pressing Bounce distance, average roll gap and the average roll-force during the passes are calculated, and regard the average roll-force as extreme trace time target roll-force；Then, roll gap is put in advance with reference to people's work card amount THICKNESS CALCULATION extreme trace time target roll gap and before biting, and performed in place by screw-down；In the extreme trace time operation of rolling, by relatively actual roll-force and target roll-force and the deviation of actual roll gap and target roll gap, outlet thickness deviation is calculated in real time with reference to spring equation, and put into closed-loop control, to ensure thickness and precision.The present invention can be in the case of independent of calibrator, to accurately being controlled using electronic and hydraulic pressing single chassis rolled aluminum sheet mill thickness.
Description
Technical field
The present invention principally falls into metal-pressed machine technical field, and in particular to a kind of aluminium using electronic and hydraulic pressing
Plate hot-rolling mill method for controlling thickness.
Background technology
The regulation of mill roll-gap needs to control (APC, Automatic Position by milling train automated location
Control) system is realized.APC is automatic thickness control (AGC, Automatic Gauge in strip production process
Control main executing agency), is divided into all-electric, all-hydraulic, electronic and three kinds of hydraulic pressure from the source of roll-force.Such as Fig. 1
Shown, in figure, ordinate S represents mill roll-gap, and abscissa t represents time, SaRepresent average roller of the slab in the operation of rolling
Seam；SrRepresent setting roll gap；SbRepresent the actual unloaded average roll gap that slab enters before milling train；ΔSabRepresent the bullet of Electro-pressing
Jump amount；ΔSrbRepresent Electro-pressing deviations；tinRepresent that slab enters the milling train moment.For needing big stroke adjustment roll gap
Milling train, typically using the pressure of electronic and Combined hydraulic, Electro-pressing is used for a wide range of coarse adjustment mill roll-gap under immunization with gD DNA vaccine,
Hydraulic pressing is used for small range accurate adjustment mill roll-gap.Due to there is gap between the down screw rod and nut of Electro-pressing, in plate
Base enters after milling train, and electronic roll gap can produce a Bounce distance, and the Bounce distance is generally 0.3~0.5mm.Because electronic roll gap is anti-
Feedback easily influenceed by installation accuracy, rolling mill vibration, therefore in many cases hydraulic pressing can not real-Time Compensation calculating it is electronic
Roll gap deviation, otherwise mill roll-gap, which is easily produced, larger fluctuation or even causes vibration.
Because the rolled piece thickness in mill roll-gap there is no method to realize real-time direct measurement so far, so in hot continuous rolling or cold rolling
In the operation of rolling of band, a kind of most common method for controlling thickness is thick to strip by the calibrator exported installed in milling train
Degree is measured, and mill roll-gap is adjusted in this, as feedback signal, realizes the real-time control to thickness.And to the plate of single chassis
For material hot-rolling mill, what is had is fitted without calibrator, although what is had is mounted with calibrator, because milling train exports plant equipment
Limitation so that calibrator apart from milling train farther out, while again because single chassis hot-rolling mill mill speed it is slower so that thickness feedback
Signal delay is larger, it is impossible to for control thickness in real time, so based on mill spring equation, using rolling force feedback signal and roller
Pressure AGC (or being roll-force AGC) system that seam feedback signal measures thickness indirectly is able to extensively should on this class milling train
With.AGC is a basic control device of Modern Rolling Mill, and it makes, and strip thickness along in rolling direction is uniform, and it is poor with plate to reduce
It is poor with different plate, so as to improve product quality, improve lumber recovery.
In terms of existing paper and patent, paper " Analysis of Positive Feedback Characteristics of Pressure AGC " (steel, 2007,42 (7):51-
55) normal pressures AGC is analyzed, it is indicated that because mill modulus C and plasticity coefficient of rolled piece Q can not be obtained accurately,
There is positive feedback region in pressure AGC, it is impossible to accomplish precise thickness control.Patent " is rolled based on the characteristic strip of mill spring
Method for controlling thickness processed " has invented a kind of method for controlling thickness based on mill spring curve, its THICKNESS CALCULATION side used
Method is to draw a fixed expression formula based on pressing data regression, is the full roll surface contact of upper working rolls and lower working rolls due to being pressed against process,
I.e. working roll contact length is identical with working roll length, and upper working rolls and lower working rolls are contacted with strip when rolling, i.e. contact length and plate
Bandwidth is identical, and plate width is less than working roll length, and the requirement of different product to width is also different, and this causes
Mill spring is different when during pressing from rolling, and the invention considers the influence of plate width with a fixed empirical model, is
Not accurate enough；Meanwhile, the characteristic of milling train is also what is be continually changing in the operation of rolling, such as thermal expansion of rollers and roll wear meeting
Cause the change of mill stiffness and actual roll gap, foregoing invention can not also solve this problem；Moreover, its control uses pure ratio
Method, it is impossible to accomplish that quick elimination is thick poor.
The content of the invention
For above-mentioned technical problem, the present invention provides a kind of rolled aluminum sheet mill thickness control using electronic and hydraulic pressing
Method, methods described can be entered in the case of independent of calibrator to electronic and hydraulic pressing single chassis rolled aluminum sheet mill
The accurate thickness control of row, to ensure that aluminium plate thickness tolerance falls the purpose in allowed band.
The present invention is achieved by the following technical solutions：
A kind of rolled aluminum sheet mill method for controlling thickness using electronic and hydraulic pressing, methods described is based on spring equation,
, can be independent of calibrator and to electronic and hydraulic pressing list using the identical identical principle of then bouncing of adjacent passage roll-force
Frame rolled aluminum sheet mill carries out accurate thickness prediction, and realizes by closed-loop control the accurate control of thickness.
Further, it the described method comprises the following steps：
Step one：The initial setting of roll gap is adjusted, most latter two passage is predicted that roll-force is approached；
Step 2：During passes second from the bottom, real-time accumulated roll gap, roll-force；
Step 3：After the completion of passes second from the bottom, first keep passage roll gap second from the bottom constant, calculate reciprocal the
The average roll gap S that two passage slabs are bitten before milling train2b, the average roll gap S that bites after milling train of passage slab second from the bottom2aWith fall
The average roll-force P of several second passages2ave, show that passage slab second from the bottom bites the Bounce distance Δ S of front and rear electronic roll gap2ab；
Step 4：A mouthful thickness h is measured by people's work card2, recalculate acquisition extreme trace time new settings roll gap S1r, and allow pressure
Mechanism performs this setting, roll gap is reached S1r；
Step 5：In the extreme trace time operation of rolling, using mill spring equation, outlet thickness deviation Δ h is calculated in real time1,
And PI with parameter variation (PI) control is put into, to ensure the thickness and precision of finished product aluminium sheet.
Further, it is characterised in that in step 3, electronic roll gap before and after the passage slab second from the bottom bites
Bounce distance：ΔS2ab=S2a-S2b。
Further, in step 4, the setting roll gap S of the extreme trace time of acquisition is recalculated1rCalculation be：
S1r=S2b-h2+htarget, wherein, h2For people's work card amount exit thickness, htargetRepresent extreme trace time target thickness.
Further, in step 5, the proportionality coefficient k of PI controllerspWith integral coefficient kiAccording to the exit thickness deviation
Δh1Difference, carry out VARIABLE PARAMETER PID CONTROL, i.e., to the exit thickness deviation delta h1Carry out Concourse Division, different thickness deviations
Segment, correspond to different kpAnd ki, segmentation principle is that the exit thickness deviation is bigger, controller proportionality coefficient kpAnd product
Divide coefficient kiTwo parameters are also bigger, and carry out amplitude limit respectively to controller output quantity and integration amount, and integration amount amplitude limit is control
0.4~0.9 times of device output quantity amplitude limit processed.
Further, in step 5, it is specially：In the extreme trace time operation of rolling, using mill spring equation, by relatively more last
The actual roll-force P of passage1With the average roll-force P of passage second from the bottom2aveDeviation and extreme trace time actual roll gap S1Again
Calculate the extreme trace time new settings roll gap S obtained1rAnd the electronic roll gap Bounce distance Δ S of passage second from the bottom2abDeviation, in real time calculate
Exit thickness deviation delta h1, and variable parameters PI control is put into, to ensure the thickness and precision of finished product aluminium sheet.
Further, in step 5, the exit thickness deviation delta h1=(S1-(S1r+ΔS2ab))+(P1-P2ave)/C2,
C herein2Represent that in roll-force be P2aveWhen mill modulus.
Further, the mill modulus C2Computational methods comprise the following steps：
(1) the throw-on pressure P of acyclic homologically trioial process is pressed against in collection*With roll gap S*, the thickness of strip h now shut out*=0, mill stiffness
Meet spring formula：
H=S+ (P-P0)/C+G
In above-mentioned formula, h represents exit thickness, and S represents roll gap, and P represents actual roll-force, P0Represent pre- throw-on pressure, C tables
Show the mill modulus that roll-force is the P moment, G represents various compensation rate sums；
If representing dependent variable and independent variable respectively with y and x, y=h-S, x=P, a=1/C, b=G-P are made0/ C is then full
Sufficient y=ax+b unitary once linear equation form, utilizes the throw-on pressure P of acquisition*With roll gap S*Draw training data y*And x*,
Coefficient a and b in linear equation is returned according to least square method, and then full roll surface stiffness coefficient C can be drawn0=1/a and
Compensation rate G=b-P0/C0；
(2) when rolling new spec product, in passes second from the bottom, sample respectively aluminium sheet head, middle part, afterbody
Roll-force P2h、P2b、P2t；After the completion of passes second from the bottom, respectively with kind of calliper aluminium sheet head, middle part, afterbody
Thickness h2h、h2b、h2t, then it is P to calculate roll-force2aveWhen, mill modulus C2=((P2h-P2b)/(h2h-h2b)+(P2b-P2t)/
(h2b-h2t)+(P2t-P2h)/(h2t-h2h))/3, if C0-100<C2<C0, then it is assumed that the rigidity C currently calculated2Be it is rational,
THICKNESS CALCULATION can be put into；Otherwise conversion card amount position is needed, is required until meeting, if many secondary card amounts are still unsatisfactory for requiring,
The full roll surface stiffness coefficient C of calculating need to be pressed against again0。
Further, in addition to extreme trace time, remaining passage all keeps roll gap to be initial setting roll gap.
Further, Electro-pressing can only be acted under no-load condition, and hydraulic pressing compensates electricity only under no-load condition
Dynamic roll gap.
The advantageous effects of the present invention：
Calculating of the method for the invention to thickness is more accurate, and system operation is more steady.In roll gap adjustment, due to PI
The desired value of controller is not directly equal to roll gap desired value, but uses ramp signal gradually to the close side of roll gap desired value
Method, while carrying out curve processing to ramp signal.It can so avoid conventional method from existing due to inertia, make APC system dynamic
Make and stopping moment operation is unstable and there is a situation where overshoot.
In summary electronic and Combined hydraulic pressure location control means and inventive method, method proposed by the present invention are not required to
Increase new equipment, you can improve press down system locating speed and stability, meet operation of rolling needs.
Brief description of the drawings
Fig. 1 is that slab enters roll gap change schematic diagram before and after milling train；
Wherein, ordinate S represents mill roll-gap, and abscissa t represents time, Δ SaRepresent that slab is flat in the operation of rolling
Equal roll gap；ΔSrRepresent setting roll gap；ΔSbRepresent the actual unloaded average roll gap that slab enters before milling train；ΔSabRepresent electronic
The Bounce distance of pressure；ΔSrbRepresent Electro-pressing deviations；tinRepresent that slab enters the milling train moment；
Fig. 2 is roll-force P1And P2THICKNESS CALCULATION schematic diagram when close.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is explained in further detail.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, and
It is not used in the restriction present invention.
On the contrary, the present invention covers any replacement done in the spirit and scope of the present invention being defined by the claims, repaiied
Change, equivalent method and scheme.Further, in order that the public has a better understanding to the present invention, below to the thin of the present invention
It is detailed to describe some specific detail sections in section description.Part without these details for a person skilled in the art
Description can also understand the present invention completely.
The rolling of single chassis hot rolled plate has that supplied materials is short, passage change frequently, unloaded pressing speed is fast, sting steel impact greatly,
Torsional oscillation is big and the features such as many product variety specifications, these features determine its AGC system using pressure AGC as main body means.
Although the form of expression of pressure AGC is various, mill spring equation is all based on.Mill spring equation form is such as
Under：
H=S+ (P-P0)/C (1)
In formula, h display plate tape thickness, S and P represent mill roll-gap and roll-force, P respectively0Pre- throw-on pressure is represented, C is represented
Mill modulus.Mill modulus C is one and the closely related variable such as roll-force P, rolled piece width W, in same
During plate rolling, if ignoring the change of roll wear and thermal expansion, it is believed that when roll-force P changes in small range
When, mill modulus C is approximately constant.
It was found from spring formula, if same slab is in the operation of rolling, the thickness of two diverse locations, roll gap, roll
There is following relation in power processed：
h1-h2=S1-S2+(P1-P2)/C (2)
Formula (2) is relative thickness calculation formula, and formula (1) is absolute thickness calculation formula.It will be apparent that according to relative thick
Calculation formula is spent, if roll gap is constant, i.e. S1=S2=S0, then h1=h2+(P1-P2)/C；And according to absolute thickness calculation formula,
If roll gap is constant, as S0, then h1=S0+(P1-P0)/C.If P1And P2Relatively, deposited referring now to as stiffness coefficient C
In the case of certain error, the order of accuarcy of two kinds of thickness equations.
It is roll-force P in Fig. 21And P2THICKNESS CALCULATION schematic diagram when close, wherein, ordinate P and h represent roll-force and gone out
Mouth thickness, abscissa t represents the time, P is may be such that by adjusting coordinate system0And h0Corresponding curve co-insides, P2And h2It is corresponding
Curve co-insides, and then P1And h10Corresponding curve co-insides.It is assumed that when calculated rigidity coefficient is 2 times of practical stiffness coefficient,
h11The thickness that corresponding curve expression is drawn with relative thickness calculation formula, h12Corresponding curve represents to use absolute thickness
The thickness that calculation formula is drawn, as shown in Fig. 2 in the case where roll gap is constant, if roll-force is P2Shi Houdu is h2, rolling
Power is P0Shi Houdu is h0, based on spring formula, Pan and Zoom coordinate system can be passed through so that P2And h2、P0And h0Weigh respectively
Close, if stiffness coefficient C calculates accurate, then rolling force curve P1Corresponding thickness curve h10Also it can overlap.It is assumed that just
Spend coefficient C and calculate inaccurate, be changed into actual 2 times, then use the thickness curve that relative thickness calculation formula is drawn then for h11,
The thickness curve that absolute thickness calculation formula is drawn is used then for h12, h11Fall in h10And h2Centre position, and h12Fall in h10With
h0Centre position.Due to generally, P0Much smaller than roll-force P1And P2, therefore h11Compare h12Closer to actual thickness h10,
Therefore the thickness that relative thickness calculation is calculated is more accurate.
In terms of existing paper and patent, paper " Analysis of Positive Feedback Characteristics of Pressure AGC " (steel, 2007,42 (7):51-
55) normal pressures AGC is analyzed, it is indicated that because mill modulus C and plasticity coefficient of rolled piece Q can not be obtained accurately,
There is positive feedback region in pressure AGC, it is impossible to accomplish precise thickness control.Therefore, the present invention does not use traditional pressure AGC to calculate
Method, merely with the thought of spring equation, it is only necessary to the mill stiffness system near specific roll-force is used in calculated thickness deviation
Number C, and the two need not be used in the control to thickness.
Embodiment 1
A kind of rolled aluminum sheet mill method for controlling thickness using electronic and hydraulic pressing, the described method comprises the following steps：
Step one：The initial setting of roll gap is adjusted, most latter two passage is predicted that rolling force deviation is less than 200KN；
Step 2：During passes second from the bottom, real-time accumulated roll gap, roll-force；
Step 3：After the completion of passes second from the bottom, calculate passage slab second from the bottom and bite being averaged before milling train
Roll gap S2b, the average roll gap S that bites after milling train of passage slab second from the bottom2aWith the average roll-force P of passage second from the bottom2ave, obtain
Go out the Bounce distance Δ S of electronic roll gap before and after passage slab second from the bottom bites2ab；
The Bounce distance of electronic roll gap before and after the passage slab second from the bottom bites：ΔS2ab=S2a-S2b。
Step 4：A mouthful thickness h is measured by people's work card2, recalculate acquisition extreme trace time new settings roll gap S1r, allow execution machine
Structure is acted in place；
Wherein, the setting roll gap S of the extreme trace time1rCalculation be：S1r=S2b-h2+htarget, wherein, h2To be artificial
Card amount exit thickness, htargetRepresent extreme trace time target thickness.
Step 5：In the extreme trace time operation of rolling, using mill spring equation, outlet thickness deviation Δ h is calculated in real time1,
And PI with parameter variation (PI) control is put into, to ensure the thickness and precision of finished product aluminium sheet.
Wherein, the proportionality coefficient k of PI controllerspWith integral coefficient kiAccording to the exit thickness deviation delta h1Difference enter
Row VARIABLE PARAMETER PID CONTROL, with exit thickness deviation delta h1Absolute value carries out stepping in the range of 0~1mm according to the interval of 0.05mm,
Proportionality coefficient kpAdjust the controller speed of response, integral coefficient kiIntegration rate is adjusted, with the increase of thickness deviation absolute value, control
Device coefficient k processedpAnd kiAlso gradually increase, to reach the quick purpose for eliminating error, controller output quantity and integration amount will be entered respectively
Row amplitude limit is controlled, and amplitude limit principle is that integration amount amplitude limit is less than controller output quantity amplitude limit, ordinary circumstance, controller output quantity amplitude limit
For 1~1.5mm, integration amount amplitude limit is 0.4~0.9 times of output quantity amplitude limit.
In step 5, it is specially：It is actual by comparing extreme trace time using mill spring equation in the extreme trace time operation of rolling
Roll-force P1With the average roll-force P of passage second from the bottom2aveDeviation and extreme trace time actual roll gap S1With recalculate acquisition
Extreme trace time new settings roll gap S1rAnd the electronic roll gap Bounce distance Δ S of passage second from the bottom2abDeviation, exit thickness is calculated in real time
Deviation delta h1, and variable parameters PI control is put into, to ensure the thickness and precision of finished product aluminium sheet.
The exit thickness deviation delta h1=(S1-(S1r+ΔS2ab))+(P1-P2ave)/C2, C herein2Expression be in roll-force
P2aveWhen mill modulus.
The mill modulus C2Computational methods comprise the following steps：
(1) the throw-on pressure P of acyclic homologically trioial process is pressed against in collection*With roll gap S*, the thickness of strip h now shut out*=0, mill stiffness
Meet spring formula：
H=S+ (P-P0)/C+Δ
In above-mentioned spring formula, h represents exit thickness, and S represents roll gap, and P represents actual roll-force, P0Represent pre- to be pressed against
Power, C represents the mill modulus that roll-force is the P moment, and Δ represents various compensation rate sums；
If representing dependent variable and independent variable respectively with y and x, y=h-S, x=P, a=1/C, b=Δs-P are made0/ C is then full
Sufficient y=ax+b unitary once linear equation form, utilizes the throw-on pressure P of acquisition*With roll gap S*Draw training data y*And x*,
Coefficient a and b in linear equation is returned according to least square method, and then full roll surface stiffness coefficient C can be drawn0=1/a and
Compensation rate Δ=b-P0/C0；
(2) when rolling new spec product, in passes second from the bottom, sample respectively aluminium sheet head, middle part, afterbody
Roll-force P2h、P2b、P2t；After the completion of passes second from the bottom, respectively with kind of calliper aluminium sheet head, middle part, afterbody
Thickness h2h、h2b、h2t, then roll-force can be calculated for P2aveWhen, mill modulus C2=((P2h-P2b)/(h2h-h2b)+(P2b-
P2t)/(h2b-h2t)+(P2t-P2h)/(h2t-h2h))/3, if C0-100<C2<C0, then it is assumed that the rigidity C currently calculated2It is reasonable
, THICKNESS CALCULATION can be put into；Otherwise conversion card amount position is needed, is required until meeting, if many secondary card amounts are still unsatisfactory for requiring,
Then need to be pressed against the full roll surface stiffness coefficient C of calculating again0.In addition to extreme trace time, remaining passage all keeps roll gap to be initial setting roll gap.
Claims (10)
1. a kind of rolled aluminum sheet mill method for controlling thickness using electronic and hydraulic pressing, it is characterised in that methods described is based on
Spring equation, can be independent of calibrator and to electronic and liquid using the identical identical principle of then bouncing of adjacent passage roll-force
The single chassis rolled aluminum sheet mill of pressure pressure carries out accurate thickness prediction, and realizes by closed-loop control the accurate control of thickness.
2. it is a kind of using the electronic rolled aluminum sheet mill method for controlling thickness with hydraulic pressing, its feature according to claim 1
It is, the described method comprises the following steps：
Step one：The initial setting of roll gap is adjusted, most latter two passage is predicted that roll-force is approached；
Step 2：During passes second from the bottom, real-time accumulated roll gap, roll-force；
Step 3：After the completion of passes second from the bottom, first keep passage roll gap second from the bottom constant, calculate road second from the bottom
The average roll gap S that secondary slab is bitten before milling train2b, the average roll gap S that bites after milling train of passage slab second from the bottom2aWith reciprocal the
The average roll-force P of two passages2ave, show that passage slab second from the bottom bites the Bounce distance Δ S of front and rear electronic roll gap2ab；
Step 4：A mouthful thickness h is measured by people's work card2, recalculate acquisition extreme trace time new settings roll gap S1r, and allow screw-down
This setting is performed, roll gap is reached S1r；
Step 5：In the extreme trace time operation of rolling, using mill spring equation, outlet thickness deviation Δ h is calculated in real time1, and put into
PI with parameter variation (PI) is controlled, to ensure the thickness and precision of finished product aluminium sheet.
3. it is a kind of using the electronic rolled aluminum sheet mill method for controlling thickness with hydraulic pressing, its feature according to claim 1
It is, in step 3, the Bounce distance of electronic roll gap before and after the passage slab second from the bottom bites：ΔS2ab=S2a-S2b。
4. method according to claim 2, it is characterised in that in step 4, recalculates the extreme trace time of acquisition
Set roll gap S1rCalculation be：S1r=S2b-h2+htarget, wherein, h2For people's work card amount exit thickness, htargetRepresent end
Passage target thickness.
5. it is a kind of using the electronic rolled aluminum sheet mill method for controlling thickness with hydraulic pressing, its feature according to claim 2
It is, in step 5, the proportionality coefficient k of PI controllerspWith integral coefficient kiAccording to the exit thickness deviation delta h1Difference,
VARIABLE PARAMETER PID CONTROL is carried out, i.e., to the exit thickness deviation delta h1Carry out Concourse Division, different thickness deviation segments, correspondence
Different kpAnd ki, segmentation principle is that the exit thickness deviation is bigger, controller proportionality coefficient kpWith integral coefficient kiTwo
Parameter is also bigger, and carries out amplitude limit respectively to controller output quantity and integration amount, and integration amount amplitude limit limits for controller output quantity
0.4~0.9 times of width.
6. it is a kind of using the electronic rolled aluminum sheet mill method for controlling thickness with hydraulic pressing, its feature according to claim 1
It is, in step 5, is specially：In the extreme trace time operation of rolling, using mill spring equation, by comparing, extreme trace time is actual to be rolled
Power P1With the average roll-force P of passage second from the bottom2aveDeviation and extreme trace time actual roll gap S1With the end for recalculating acquisition
Passage new settings roll gap S1rAnd the electronic roll gap Bounce distance Δ S of passage second from the bottom2abDeviation, in real time calculate outlet thickness deviation
Δh1, and variable parameters PI control is put into, to ensure the thickness and precision of finished product aluminium sheet.
7. it is a kind of using the electronic rolled aluminum sheet mill method for controlling thickness with hydraulic pressing, its feature according to claim 2
It is, in step 5, the exit thickness deviation delta h1=(S1-(S1r+ΔS2ab))+(P1-P2ave)/C2, C herein2Expression is being rolled
Power processed is P2aveWhen mill modulus.
8. it is a kind of using the electronic rolled aluminum sheet mill method for controlling thickness with hydraulic pressing, its feature according to claim 7
It is, the mill modulus C2Computational methods comprise the following steps：
(1) the throw-on pressure P of acyclic homologically trioial process is pressed against in collection*With roll gap S*, the thickness of strip h now shut out*=0, mill stiffness meets
Bounce formula：
H=S+ (P-P0)/C+G
In above-mentioned formula, h represents exit thickness, and S represents roll gap, and P represents actual roll-force, P0Pre- throw-on pressure is represented, C represents to roll
Power processed is the mill modulus at P moment, and G represents various compensation rate sums；
If representing dependent variable and independent variable respectively with y and x, y=h-S, x=P, a=1/C, b=G-P are made0/ C, then meet y=
Ax+b unitary once linear equation form, utilizes the throw-on pressure P of acquisition*With roll gap S*Draw training data y*And x*, according to most
Coefficient a and b in young waiter in a wineshop or an inn's squares regression linear equation, and then full roll surface stiffness coefficient C can be drawn0=1/a and compensation rate G
=b-P0/C0；
(2) when rolling new spec product, in passes second from the bottom, sample respectively aluminium sheet head, middle part, afterbody roll
Power P processed2h、P2b、P2t；After the completion of passes second from the bottom, respectively with kind of calliper aluminium sheet head, middle part, afterbody thickness
h2h、h2b、h2t, then it is P to calculate roll-force2aveWhen, mill modulus C2=((P2h-P2b)/(h2h-h2b)+
(P2b-P2t)/(h2b-h2t)+(P2t-P2h)/(h2t-h2h))/3, if C0-100<C2<C0, then it is assumed that the rigidity currently calculated
C2It is rational, puts into THICKNESS CALCULATION；Otherwise conversion card amount position is needed, is required until meeting, if many secondary card amounts are still unsatisfactory for
It is required that, then need to be pressed against the full roll surface stiffness coefficient C of calculating again0。
9. it is a kind of using the electronic rolled aluminum sheet mill method for controlling thickness with hydraulic pressing, its feature according to claim 2
It is, in addition to extreme trace time, remaining passage all keeps roll gap to be initial setting roll gap.
10. according to a kind of any one of claim 1-9 rolled aluminum sheet mill thickness control sides using electronic and hydraulic pressing
Method, it is characterised in that Electro-pressing can only be acted under no-load condition, and hydraulic pressing only compensates electromotive roller under no-load condition
Seam.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710429477.5A CN107138537B (en) | 2017-06-08 | 2017-06-08 | It is a kind of using electronic and hydraulic pressing rolled aluminum sheet mill method for controlling thickness |
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| CN201710429477.5A CN107138537B (en) | 2017-06-08 | 2017-06-08 | It is a kind of using electronic and hydraulic pressing rolled aluminum sheet mill method for controlling thickness |
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| CN107138537A true CN107138537A (en) | 2017-09-08 |
| CN107138537B CN107138537B (en) | 2019-05-24 |
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| CN107983780A (en) * | 2017-11-30 | 2018-05-04 | 中冶南方工程技术有限公司 | A kind of speed compensation method and system of Hot Rolling Process For High Temperature Alloy Plate machine hydraulic press down system |
| CN108723098A (en) * | 2018-05-09 | 2018-11-02 | 北京科技大学 | A kind of position synchronization control method of milling train both sides Hydrauservo System |
| CN110794879A (en) * | 2019-11-30 | 2020-02-14 | 张家港宏昌钢板有限公司 | PID (proportion integration differentiation) adjusting method and control system for stable oxygen flow adjusting valve |
| CN111672902A (en) * | 2020-06-19 | 2020-09-18 | 武汉钢铁有限公司 | Multifunctional test rolling mill capable of rolling special-shaped raw materials |
| CN112439792A (en) * | 2019-08-30 | 2021-03-05 | 宝山钢铁股份有限公司 | Rough rolling width dynamic correction method based on vertical roll rolling force |
| CN112775193A (en) * | 2020-12-27 | 2021-05-11 | 无锡天德金属制品有限公司 | Development and application technology of pressure closed-loop roll gap control technology for aluminum alloy cast-rolled plate |
| CN113500100A (en) * | 2021-07-19 | 2021-10-15 | 燕山大学 | Roll gap control method based on mechanical parameters on rolling contact interface segmentation model |
| CN114535314A (en) * | 2022-03-29 | 2022-05-27 | 重庆钢铁股份有限公司 | Control method and system for calculating roll gap after finish rolling |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107983780A (en) * | 2017-11-30 | 2018-05-04 | 中冶南方工程技术有限公司 | A kind of speed compensation method and system of Hot Rolling Process For High Temperature Alloy Plate machine hydraulic press down system |
| CN107983780B (en) * | 2017-11-30 | 2019-07-05 | 中冶南方工程技术有限公司 | A kind of speed compensation method and system of Hot Rolling Process For High Temperature Alloy Plate machine hydraulic press down system |
| CN108723098A (en) * | 2018-05-09 | 2018-11-02 | 北京科技大学 | A kind of position synchronization control method of milling train both sides Hydrauservo System |
| CN112439792A (en) * | 2019-08-30 | 2021-03-05 | 宝山钢铁股份有限公司 | Rough rolling width dynamic correction method based on vertical roll rolling force |
| CN110794879A (en) * | 2019-11-30 | 2020-02-14 | 张家港宏昌钢板有限公司 | PID (proportion integration differentiation) adjusting method and control system for stable oxygen flow adjusting valve |
| CN111672902A (en) * | 2020-06-19 | 2020-09-18 | 武汉钢铁有限公司 | Multifunctional test rolling mill capable of rolling special-shaped raw materials |
| CN111672902B (en) * | 2020-06-19 | 2022-07-08 | 武汉钢铁有限公司 | Multifunctional test rolling mill capable of rolling special-shaped raw materials |
| CN112775193A (en) * | 2020-12-27 | 2021-05-11 | 无锡天德金属制品有限公司 | Development and application technology of pressure closed-loop roll gap control technology for aluminum alloy cast-rolled plate |
| CN113500100A (en) * | 2021-07-19 | 2021-10-15 | 燕山大学 | Roll gap control method based on mechanical parameters on rolling contact interface segmentation model |
| CN113500100B (en) * | 2021-07-19 | 2022-04-26 | 燕山大学 | Roll gap control method based on mechanical parameters on rolling contact interface segmentation model |
| CN114535314A (en) * | 2022-03-29 | 2022-05-27 | 重庆钢铁股份有限公司 | Control method and system for calculating roll gap after finish rolling |
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