CN101337237A - Thickness automatic allocation process of single-frame double coiling-aluminum hot milling roll - Google Patents
Thickness automatic allocation process of single-frame double coiling-aluminum hot milling roll Download PDFInfo
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- CN101337237A CN101337237A CNA2008100225048A CN200810022504A CN101337237A CN 101337237 A CN101337237 A CN 101337237A CN A2008100225048 A CNA2008100225048 A CN A2008100225048A CN 200810022504 A CN200810022504 A CN 200810022504A CN 101337237 A CN101337237 A CN 101337237A
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Abstract
The invention provides a method for automatically assigning the thickness of a single-stand double coiler aluminum hot rolling mill. The single-stand double coiler thickness assignment is divided into a non-coiler part and a coiler part; the thickness assignment for a non-coiler pass is performed according to a reduction rule curve, and then the reduction rate is adjusted by a weight coefficient; the thickness assignment for a coiler pass is performed according to the rolling pressure distribution ratio or the equal reduction rate; a roll torque and rolling power are checked on the basis of initially-completed thickness assign, and adjusted to meet the load requirement. Through the combination of accumulation of an experience distribution curve and the adjustment process of a weight coefficient, the automatic assignment of the thickness of each pass of the plate slabs of different thickness and different alloys is realized; therefore, the assign method has the advantages of concision, practicality, and high efficiency, and is worth popularizing and applying in the industry.
Description
Technical field
The present invention relates to a kind of aluminothermy and roll thickness automatic allocation process in the production, relate in particular to a kind of thickness automatic allocation process that is applied in single-frame double-coiling aluminium hot-rolling mill.
Background technology
Single-frame double-coiling aluminium hot-rolling mill is to use more a kind of milling train after 2000 at home, and its investment of tandem rolling is little relatively, and aluminium cold rolling feeding properties of product are higher.At present in single-frame double-coiling aluminium hot-rolling mill is produced, artificial experience is assigned as the master, after given each passage amount of thickness, it is rolling to carry out reality, need adjust again if the thickness sendout is unreasonable in the operation of rolling, but, exist the shortcoming that is not suitable in line computation, is unfavorable for realizing operation of rolling automation when the thickness change of supplied materials alloy then needs the technologist to propose new distribution again.
Distribution method based on energy consumption curve in distributing, iron and steel hot continuous rolling thickness has been proposed, it is the energy consumption curve that extracts each steel grade through one section rolling back, and the energy consumption distribution ratio of given each rolling pass, distribute energy consumption curve when to solve the thickness of each passage according to energy consumption, in fact the forms of distribution that need artificial given thickness, be fit to have same consumption energy curve manipulation condition, the thickness that is not suitable for different rolling conditions distributes, can not realize onlinely distributing automatically, this in addition method is used more in hot continuous rolling, is suitable in the less steel industry of rolling pass.
In addition, there is the scholar to propose thickness allocation optimized method based on related algorithm, as waiting methods such as sharing of load, combination of plurality of target function, these methods from balanced load, reduce the angle of energy consumption, algorithm calculating is optimized in utilization, the thickness that proposes distributes more excellent in theory, but owing to do not drop into practical application mostly, big with the field condition difference, and owing to added the optimization algorithm, the online optimizing time is longer, is unfavorable for online computing application.
Therefore, designing a kind of thickness automatic allocation process at single-frame double-coiling aluminium hot-rolling mill, will be a research topic with great practical significance.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, a kind of single-frame double-coiling aluminium hot-rolling mill thickness automatic allocation process is provided.
Purpose of the present invention is achieved through the following technical solutions:
The single-frame double-coiling aluminium hot-rolling mill thickness automatic allocation process, characteristics are: the nothing that the operation of rolling is divided into leading portion is batched the two parts that batch with back segment, depressing distribution curve in no reel-up based on experience distributes, and use weight coefficient adjustment correction and depress distribution, distribute in the method that reduction ratios such as reel-up employing or draught pressure distribution ratio are arranged, thereby, make in the operation of rolling and distribute thickness automatically according to different supplied materials thickness, comprise following concrete steps---
(1) nothing of the leading portion thickness basic of distribution that batches passage is depressed law curve and is carried out, and depresses law curve and is expressed as with biquadratic curve:
y(x)＝a
4x
4+a
3x
3+a
2x
2+a
1x+a
0x∈[1，n] y∈[0，0.5]
In the formula, x is a number of times, and y is a reduction ratio, and n is the rolling pass number; Solve and do not have every time the reduction ratio batch passage;
1a) given sotck thinkness, finished product thickness, batch thickness, percentage pass reduction and rolling pass number, solving does not have every time the drafts batch passage:
h
i＝H
i·(1-ε
i)
In the formula, h
iBe exit thickness, H
iBe inlet thickness, i is a number of times, ε
iBe percentage pass reduction; And then acquisition does not have the thickness distribution of batching passage;
And drafts is adjusted with weight coefficient:
1b) according to finding the solution the thickness sendout that obtains by depressing law curve, under the situation that satisfies the initial depression condition, tried to achieve batch thickness and target is batched thickness if any difference, need carry out the adjustment again that thickness distributes, batch thickness and the target of distributing are automatically batched thickness and are compared, both differences are distributed again by weight coefficient:
Δh
i＝γ
i·(h′-h
0)
In the formula, Δ h
iFor every time depresses thickness adjustment amount, γ
iAdjust weight coefficient for depressing thickness, h ' for distribute automatically try to achieve batch thickness, h
0For target is batched thickness; Promptly batch thickness and the target that will distribute automatically in rolling former passages batched the difference of thickness and digested;
(2) thickness that the passage of batching is arranged of back segment distributes, and has dual mode to distribute, promptly draught pressure distribution ratio mode or etc. reduction ratio distribution ratio mode;
2a) for draught pressure distribution ratio mode, by waiting drafts to distribute, each passage draught pressure is compared adjustment earlier, make each passage draught pressure reach the distribution target, and then try to achieve each percentage pass reduction;
Draught pressure distribution ratio formula is:
P
1∶P
2∶…P
n-1∶P
n＝α
1∶α
2∶…α
n-1∶α
n
In the formula, P is a draught pressure, and n is for batching number of times, and α is a distribution ratio, and α determines that according to the good principle of holding plate shape general extreme trace keeps less draught pressure, and former passage draught pressures can balancedly equate;
2b) for mode such as distribution ratio such as reduction ratio such as grade, known sotck thinkness, finished product thickness, the road number of times of batching, wait the reduction ratio formula to be:
In the formula, ε
iFor batching percentage pass reduction, h is a finished product thickness, H
0For batching sotck thinkness, n is for batching number of times; Solve every time the reduction ratio that batches passage;
And then obtain to have the thickness of the passage of batching to distribute;
(3) after carrying out all road sub-distribution, carry out the check of power energy parameter and bite condition with the rolling mill practice model, the formula of check is:
P
Wi≤P
W G
i≤G λ
i≤λ
In the formula, P
WiBe the power of certain passage, G
iBe the moment of certain passage, P
WBe rated power, G is a rated moment, λ
iBe the nip angle of certain passage, λ is maximum nip angle; Δ H
iBe draught per pass, R is the working roll radius; If certain percentage pass reduction excess load is then batched and batched two parts and will depress the residual quantity mean allocation to each passage by nothing, check.
Further, above-mentioned single-frame double-coiling aluminium hot-rolling mill thickness automatic allocation process, the thickness that batches passage for nothing distributes, its weight coefficient also comprises the step 1c that adjusts for the operative employee to the adjustment of reduction ratio), if first percentage pass reduction is improper, then distribute again from following a time,, then distribute again from last a time by weight coefficient if it is improper to batch the reduction ratio of passage by weight coefficient:
Δh′
i＝γ′
i·H
0·(ε′
0-ε
0)
Δh″
i＝γ″
i·h
0·(ε″
m-ε
m)
In the formula, Δ h
i' headed by every time depresses thickness adjustment amount, γ after the passage adjustment
i' headed by depress thickness after the passage adjustment and adjust weight coefficient, H
0Be supplied materials target thickness, ε
0' headed by percentage pass reduction after the passage adjustment, ε
0Headed by the former percentage pass reduction of passage, Δ h
i" every time depresses thickness adjustment amount, γ for after batching the passage adjustment
i" after batching the passage adjustment, depress thickness adjustment weight coefficient, h
0Be finish to gauge target thickness, ε
m" for batching percentage pass reduction after the passage adjustment, ε
mFor batching the former percentage pass reduction of passage.
Further, above-mentioned single-frame double-coiling aluminium hot-rolling mill thickness automatic allocation process is for the draught pressure distribution ratio mode that the passage of batching is arranged, P
1: P
2: ... P
N-1: P
n=α
1: α
2: ... α
N-1: α
nBy 1: 1: ... distribute at 1: 0.8.
Substantive distinguishing features and obvious improvement that technical solution of the present invention is outstanding are mainly reflected in:
The present invention is divided into the distribution of single-frame double-coiling thickness not have and batches and batch two parts, not having the thickness basic of distribution batch passage depresses law curve and carries out, with weight coefficient reduction ratio is adjusted, when batching passage thickness distribute by the draught pressure distribution ratio or etc. the reduction ratio dual mode distribute, carry out the check of roll torque and rolling power tentatively finishing on the basis that thickness distributes, and be adjusted to and satisfy burden requirement.Accumulation by the experience distribution curve combines with the adjusting process of weight coefficient, the utilization actual production thickness of ripe multiple alloy distributes technology, the thickness of realizing each passage of slab of different-thickness, different-alloy distributes automatically, distribution method is succinct, practical, has simultaneously characteristics such as computational speed is fast, efficient again.Having overcome in the prior art when supplied materials thickness and alloy species change needs artificial experience to redistribute, be unfavorable for realizing that online automatic thickness distributes and the shortcoming of operation of rolling automation, has very strong practicality, as long as according to supplied materials thickness, the requirement of alloy and rolling pass can distribute a cover automatically and be applicable to on-the-spot rolling thickness rules, have higher efficient and generalization again, on the basis of actual production data, realized the automation that thickness distributes, be the important foundation that realizes the process computer control of single-frame double-coiling simultaneously, for the single-frame double-coiling aluminium hot field of rolling provides strong technical support, brought very good economic benefit simultaneously.
Description of drawings
Below in conjunction with accompanying drawing technical solution of the present invention is described further:
Fig. 1: thickness of the present invention distributes the schematic diagram of technological principle automatically;
Fig. 2: the schematic diagram of the automatic Distribution Calculation process of thickness;
Fig. 3: the actual curve of depressing of 5052 aluminium alloys;
Fig. 4: 5052 aluminium alloy actual allocated and the schematic diagram that distributes contrast automatically.
The specific embodiment
The present invention proposes a kind of thickness automatic allocation process at single-frame double-coiling aluminium hot-rolling mill, two parts are batched and batched to the distribution of single-frame double-coiling thickness by nothing to be divided, not having the thickness basic of distribution batch passage depresses law curve and carries out, with weight coefficient reduction ratio is adjusted again, when batching passage thickness distribute can by the draught pressure distribution ratio or etc. the reduction ratio dual mode distribute, on the basis of tentatively finishing the thickness distribution, carry out the check of roll torque and rolling power, and adjust until satisfying burden requirement, realize that carrying out automatic thickness according to different supplied materials thickness in the operation of rolling distributes.
As shown in Figure 1 and Figure 2, by collecting the actual production thickness apportioning cost of various alloys, extract the thickness distribution curve; Single-frame double-coiling is divided into not having batches rolling and batch rolling two kinds of situations, batch rolling pass in nothing and adopt the thickness distribution curve that extracts to carry out sub-distribution just earlier, the method for using weight coefficient does not afterwards again have the thickness of the passage of batching and adjusts automatically; The distribution principle of weight coefficient is determined according to the rolling mill practice characteristics of single-frame double-coiling; Do not have and batch passage, carry out artificial adjustment distributing the back automatically according to the rolling situation of reality.There is being the passage of batching to adopt the draught pressure distribution ratio or waiting the mode of reduction ratio to carry out the thickness distribution.Carrying out every time power after nothing is batched passage and had the sub-distribution of batching to finish can parameter check, and makes every time thickness allocator energy requirement with joint efforts.Concrete detailed step is as follows---
(1) nothing of the leading portion thickness basic of distribution that batches passage is depressed law curve and is carried out, and guarantees first percentage pass reduction, sets up the rolling procedure database of multiple series alloys, extracts the law curve of depressing of these alloys, depresses law curve and is expressed as with biquadratic curve:
y(x)＝a
4x
4+a
3x
3+a
2x
2+a
1x+a
0 x∈[1，n] y∈[0，0.5]
In the formula, x is a number of times, and y is a reduction ratio, and n is the rolling pass number; The road number of times rolling according to need is updated in the curvilinear equation, and solving does not have every time the drafts batch passage;
1a) given sotck thinkness, finished product thickness, batch thickness, first percentage pass reduction and rolling pass number, depress law curve accordingly according to the alloy species extraction, substitution road number of times, primary Calculation goes out the reduction ratio of each passage, and then tries to achieve and do not have the thickness distribution of batching passage:
h
i＝H
i·(1-ε
i)
In the formula, h
iBe exit thickness, H
iBe inlet thickness, i is a number of times, ε
iBe percentage pass reduction; And then acquisition does not have the thickness distribution of batching passage;
And with weight coefficient drafts is adjusted, guarantee that outlet batches thickness:
1b) because the thickness sendout of finding the solution this moment, push away by depressing law curve fully, batch thickness and the target of being tried to achieve under the situation that satisfies the initial depression condition are batched thickness and are had difference, at this moment need to carry out the adjustment again that thickness distributes, adjust principle and be and satisfy initial passage and depress and guarantee under the situation of condition that target batches thickness, batch thickness and the target of distributing are automatically batched thickness and are compared, both differences are distributed again by weight coefficient:
Δh
i＝γ
i·(h′-h
0)
In the formula, Δ h
iFor every time depresses thickness adjustment amount, γ
iAdjust weight coefficient for depressing thickness, h ' for distribute automatically try to achieve batch thickness, h
0For target is batched thickness; Promptly batch thickness and the target that will distribute automatically in rolling former passages batched the difference of thickness and digested;
1c) adjust,, then distribute again from following a time,, then distribute again from last a time by weight coefficient if it is improper to batch the reduction ratio of passage by weight coefficient if first percentage pass reduction is improper for the operative employee,
Δh′
i＝γ′
i·H
0·(ε′
0-ε
0)
Δh″
i＝γ
i″·h
0·(ε″
m-ε
m)
In the formula, Δ h
i' headed by every time depresses thickness adjustment amount, γ after the passage adjustment
i' headed by depress thickness after the passage adjustment and adjust weight coefficient, H
0Be supplied materials target thickness, ε
0' headed by percentage pass reduction after the passage adjustment, ε
0Headed by the former percentage pass reduction of passage, Δ h
i" every time depresses thickness adjustment amount, γ for after batching the passage adjustment
i" after batching the passage adjustment, depress thickness adjustment weight coefficient, h
0Be finish to gauge target thickness, ε
m" for batching percentage pass reduction after the passage adjustment, ε
mFor batching the former percentage pass reduction of passage;
(2) thickness that the passage of batching is arranged of back segment distributes, there is dual mode to distribute, promptly wait reduction ratio distribution ratio mode or draught pressure distribution ratio mode, to the strict aluminium alloy of plate shape the time, use draught pressure distribution ratio mode, mode such as distribution ratio such as reduction ratio such as uses grade under the general rolling situation:
2a) because draught pressure is the function of drafts, for draught pressure distribution ratio mode, to batch each reduction in pass earlier by waiting drafts to distribute, and then given correction step-length is adjusted the initial depression amount, until the desired value that satisfies the draught pressure distribution ratio, finally try to achieve the drafts that batches each passage, and then try to achieve the reduction ratio that batches each passage;
Draught pressure distribution ratio formula is:
P
1∶P
2∶…P
n-1∶P
n＝α
1∶α
2∶…α
n-1∶α
n
In the formula, P is a draught pressure, and n is for batching number of times, and α is a distribution ratio, and α determines that according to the good principle of holding plate shape general extreme trace keeps less draught pressure, and former passage draught pressures can balancedly equate, by 1: 1: ... distribute at 1: 0.8;
2b) for mode such as distribution ratio such as reduction ratio such as grade, known sotck thinkness, finished product thickness, the road number of times of batching, wait the reduction ratio formula to be:
In the formula, ε
iBe reduction ratio, h is a finished product thickness, H
0For batching sotck thinkness, n is for batching number of times, solve every time the reduction ratio that batches passage;
And then obtain to have the thickness of the passage of batching to distribute;
(3) after carrying out all road sub-distribution, carry out the check of power energy parameter and bite condition with the rolling mill practice model, the formula of check is:
P
Wi≤P
W G
i≤G λ
i≤λ
In the formula, P
WiBe the power of certain passage, G
iBe the moment of certain passage, P
WBe rated power, G is a rated moment, λ
iBe the nip angle of certain passage, λ is maximum nip angle, Δ H
iBe draught per pass, R is the working roll radius;
If certain percentage pass reduction excess load is then batched and batched two parts and will depress the residual quantity mean allocation to each passage by nothing, proceed to check.
Batch thickness with target difference is arranged by the passage thickness that batches of depressing that rate curve distributes, both difference is assigned in all the other passages except that first passage (general first passage is owing to depressing and the requirement of alloy property, and reduction ratio is not done correction) by weight coefficient.The function that also comprises artificial correction passage in addition if first percentage pass reduction is improper, is then distributed from following a time by weight coefficient again, if it is improper to batch the reduction ratio of passage, then distributes again from last a time by weight coefficient.Weight coefficient principle in the automatic assigning process of thickness is:
The first passage adjustment of I is adjusted into the master with the several passages after the first passage, and the weight coefficient of these several passages is relatively large;
The II extreme trace is adjusted, and is adjusted into the master with extreme trace time preceding several passages, and the weight coefficient of these several passages is relatively large;
III distributes back adjustment automatically, is adjusted into the master with the intermediate rolling passage, and the weight coefficient of these several passages is relatively large, transforms thickness more;
IV is according to the difference of deformation stress in aluminium alloys performance, and is also different for the weight coefficient distribution of different-alloy, for softer alloy, adopts front passage weight coefficient big, the little strategy of back passage weight coefficient; For medium and harder alloy, adopt front passage weight coefficient little, the big strategy of back passage weight coefficient;
V is owing to the situation of the depressing difference of width different aluminum alloys, and weight coefficient needs the width according to rolled strip, adjusts.
Determining in carrying out the automatic process of distributing of thickness by drafts by rolling calculated with mathematical model rolling power and roll torque, and compare correction with rated power, rated moment, in the passage afterwards if power can excess load situation then by the weight coefficient of each passage sub-distribution drafts in road to this passage before and after this passage, until satisfying the requirement of power energy.
Be assigned as example with certain single-frame double-coiling thickness, technical solution of the present invention is described in further detail.
Known conditions: 5052 aluminium alloy inlet thickness 490mm, exit thickness 5.3mm, target is batched thickness 25mm, batch number of times 3, do not have and batch number of times 16, specified rolling power 10000kW, specified roll torque 2600kN.m, width 1800mm, working roll roller footpath 965mm, mill speed 1.6m/s, gearratio 6.5,470 ℃ of start rolling temperatures, coiling tension 200kN, maximum nip angle 0.3 radian.
Find the solution: the thickness of each passage distributes
Separate:
1) 5052 aluminium alloys depress curve such as Fig. 3, its nothing is batched four fitting coefficients such as the following table 1 of passage.
Table 1
| a4 | a3 | a2 | a1 | a0 |
| 0.0061 | -0.1648 | 1.4549 | -3.6749 | 8.5009 |
2) according to depressing curve and known conditions, carry out the first sub-distribution of thickness, thickness allocation table such as following table 2.
Table 2
| Rolling pass | Working modulus/% | Reduction ratio comparison/% | Thick/mm enters the mouth | Export thick/mm | Drafts/ |
| 1 | 4.98 | -0.13 | 490.00 | 465.00 | 25.00 |
| 2 | 4.25 | -3.28 | 465.00 | 445.25 | 19.75 |
| 3 | 4.55 | -2.43 | 445.25 | 425.00 | 20.25 |
| 4 | 5.47 | -2.03 | 425.00 | 401.75 | 23.25 |
| 5 | 6.69 | -1.42 | 401.75 | 374.87 | 26.88 |
| 6 | 7.99 | -3.78 | 374.87 | 344.94 | 29.94 |
| 7 | 9.22 | -4.11 | 344.94 | 313.12 | 31.82 |
| 8 | 10.37 | -1.17 | 313.12 | 280.66 | 32.47 |
| 9 | 11.48 | -1.57 | 280.66 | 248.45 | 32.21 |
| 10 | 12.69 | -2.31 | 248.45 | 216.91 | 31.54 |
| 11 | 14.27 | -0.44 | 216.91 | 185.96 | 30.95 |
| 12 | 16.54 | -0.70 | 185.96 | 155.21 | 30.75 |
| 13 | 19.93 | 3.26 | 155.21 | 124.27 | 30.93 |
| 14 | 24.97 | -0.03 | 124.27 | 93.24 | 31.03 |
| 15 | 32.28 | -3.72 | 93.24 | 63.14 | 30.10 |
| 16 | 42.58 | -5.34 | 63.14 | 36.26 | 26.88 |
Batching thickness and target as can be seen from Table 2, to batch thickness different, have difference, according to weight coefficient thickness difference adjusted, and be assigned to (except that first passage) in each passage, and final and target batched consistency of thickness, thickness allocation table such as following table 3.
Table 3
3) manual amendment's function, the operative employee can make amendment to first passage or the reduction ratio that batches passage according to the condition of production, supposed to batch percentage pass reduction in this example and adjusted to 47% by 51.81%, then will depress thickness difference according to weight coefficient is assigned in each passage of batching before the passage, also in program, provide the limit value that batches passage and first passage in addition, if surpass limit value then adjustment automatically in program.
4) for batching passage, use the draught pressure distribution ratio or etc. the mode of reduction ratio distribute; By batching number of times, pony-roughing pass exit thickness and finished product thickness, the drafts geometric ratio is assigned to each passage, be rolled the calculating of pressure and other parameters; According to the relative ratio of each passage draught pressure, the relative reduction of each passage is revised in circulation, to satisfy draught pressure ratio then.Thickness allocation table such as table 3.
Actual (real) thickness distributes and to refer to the thickness distribution condition that adopts in the actual production among Fig. 4, the automatic method of salary distribution 1 of thickness refers to batch passage with waiting reduction ratio mode that adopts, the automatic method of salary distribution 2 of thickness refers to batch passage draught pressure distribution ratio mode, and this dual mode all adopts identical thickness automatic allocation process when nothing is batched passage.
According to rolling mill practice model commonly used parameters such as roll torque, rolling power, nip angle are checked, the mill speed identical, rolling tensile force and other condition have been supposed with physical condition, this example fall into a trap let it pass newly adjust-wait power under the reduction ratio pattern can check situation, as following table 4.
Table 4
| Rolling pass | Actual pressure/t | New pressure/t | Actual moment/kN.m | New moment/kN.m | Actual power/kW | New power/kW | Actual nip angle/rad | New nip angle/ |
| 1 | 882.70 | 926.83 | 144.00 | 158.40 | 3136.95 | 3623.18 | 0.23 | 0.23 |
| 2 | 918.56 | 839.25 | -164.00 | -136.59 | 3474.70 | 3038.70 | 0.24 | 0.28 |
| 3 | 1032.03 | 926.76 | 248.00 | 199.53 | 5866.37 | 4955.90 | 0.22 | 0.26 |
| 4 | 1075.61 | 1029.65 | -240.00 | -219.43 | 6034.73 | 5793.27 | 0.23 | 0.26 |
| 5 | 1051.21 | 1066.42 | 224.00 | 230.00 | 6508.27 | 7016.85 | 0.25 | 0.26 |
| 6 | 1020.40 | 926.87 | -224.00 | -184.40 | 6834.97 | 5907.98 | 0.26 | 0.30 |
| 7 | 1041.56 | 975.38 | 248.00 | 216.99 | 7429.44 | 6825.56 | 0.27 | 0.30 |
| 8 | 1055.92 | 1153.39 | -268.00 | -319.03 | 7842.75 | 9802.99 | 0.27 | 0.26 |
| 9 | 1031.10 | 1121.75 | 260.00 | 307.03 | 7977.86 | 9891.96 | 0.27 | 0.26 |
| 10 | 1000.78 | 1077.43 | -244.00 | -282.17 | 7690.19 | 9337.69 | 0.26 | 0.26 |
| 11 | 831.89 | 1008.21 | 176.00 | 257.93 | 3532.66 | 5436.00 | 0.27 | 0.23 |
| 12 | 761.27 | 896.67 | -148.00 | -204.86 | 3948.88 | 5739.44 | 0.26 | 0.23 |
| 13 | 853.06 | 1126.61 | 156.00 | 271.47 | 4447.61 | 8126.75 | 0.26 | 0.21 |
| 14 | 958.91 | 1130.30 | -156.00 | -216.26 | 5116.90 | 7448.09 | 0.26 | 0.23 |
| 15 | 1219.49 | 1362.55 | 164.00 | 204.27 | 6807.74 | 8903.38 | 0.26 | 0.24 |
| 16 | 1382.62 | 1425.31 | -160.00 | -169.65 | 5952.83 | 6627.35 | 0.22 | 0.23 |
| 17 | 1663.43 | 1673.06 | 148.00 | 149.38 | 5307.22 | 5624.50 | 0.15 | 0.16 |
| 18 | 1031.61 | 1188.39 | -48.00 | -63.55 | 2133.62 | 2966.21 | 0.12 | 0.11 |
| 19 | 686.19 | 709.56 | 40.00 | 42.67 | 1434.29 | 1606.71 | 0.09 | 0.09 |
Depressing actual value is actual production reduction ratio data; Formerly depress that to adjust be to batch after passage pushes lower curve for the first time and distribute in nothing, percentage pass reduction is adjusted with weight coefficient; Depress newly that to adjust be by manually-operated or the self-adjusting optimal value of program on former basis of depressing adjustment.
In sum, the present invention combines with the adjusting process of weight coefficient by the accumulation of experience distribution curve, the utilization actual production thickness of ripe multiple alloy distributes technology, the thickness of realizing each passage of slab of different-thickness, different-alloy distributes automatically, distribution method is succinct, practical, has again simultaneously that computational speed is fast, characteristics of high efficiency.Having overcome in the prior art when supplied materials thickness and alloy species change needs artificial experience to redistribute, be unfavorable for realizing that online automatic thickness distributes and the shortcoming of operation of rolling automation, has very strong practicality, as long as according to supplied materials thickness, the requirement of alloy and rolling pass can distribute a cover automatically and be applicable to on-the-spot rolling thickness rules, have higher efficient and generalization again, on the basis of actual production data, realized the automation that thickness distributes, be the important foundation that realizes the process computer control of single-frame double-coiling simultaneously, provide strong technical support for the single-frame double-coiling aluminium hot field of rolling simultaneously, economic benefit and social effect are remarkable, are worth wide popularization and application in the field of business.
Below only be concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, all drop within the rights protection scope of the present invention.
Claims (3)
1. single-frame double-coiling aluminium hot-rolling mill thickness automatic allocation process, it is characterized in that: the nothing that the operation of rolling is divided into leading portion is batched the two parts that batch with back segment, depressing distribution curve in no reel-up based on experience distributes, and use weight coefficient adjustment correction and depress distribution, distribute in the method that reduction ratios such as reel-up employing or draught pressure distribution ratio are arranged, thereby, make in the operation of rolling and distribute thickness automatically according to different supplied materials thickness, comprise following concrete steps---
(1) nothing of the leading portion thickness basic of distribution that batches passage is depressed law curve and is carried out, and depresses law curve and is expressed as with biquadratic curve:
y(x)＝a
4x
4+a
3x
3+a
2x
2+a
1x+a
0 x∈[1，n]y∈[0，0.5]
In the formula, x is a number of times, and y is a reduction ratio, and n is the rolling pass number; The road number of times rolling according to need is updated in the curvilinear equation, and solving does not have every time the reduction ratio batch passage;
1a) given sotck thinkness, finished product thickness, batch thickness, percentage pass reduction and rolling pass number, solving does not have every time the drafts batch passage:
h
i＝H
i·(1-ε
i)
In the formula, h
iBe exit thickness, H
iBe inlet thickness, i is a number of times, ε
iBe percentage pass reduction; And then acquisition does not have the thickness distribution of batching passage;
And drafts is adjusted with weight coefficient:
1b) according to finding the solution the thickness sendout that obtains by depressing law curve, under the situation that satisfies the initial depression condition, tried to achieve batch thickness and target is batched thickness if any difference, need carry out the adjustment again that thickness distributes, batch thickness and the target of distributing are automatically batched thickness and are compared, both differences are distributed again by weight coefficient:
Δh
i＝γ
i·(h′-h
0)
In the formula, Δ h
iFor every time depresses thickness adjustment amount, γ
iAdjust weight coefficient for depressing thickness, h ' for distribute automatically try to achieve batch thickness, h
0For target is batched thickness; Promptly batch thickness and the target that will distribute automatically in rolling former passages batched the difference of thickness and digested;
(2) thickness that the passage of batching is arranged of back segment distributes, and has dual mode to distribute, promptly draught pressure distribution ratio mode or etc. reduction ratio distribution ratio mode;
2a) for draught pressure distribution ratio mode, by waiting drafts to distribute, each passage draught pressure is compared adjustment earlier, make each passage draught pressure reach the distribution target, and then try to achieve each percentage pass reduction;
Draught pressure distribution ratio formula is:
P
1∶P
2∶…P
n-1∶P
n＝α
1∶α
2∶…α
n-1∶α
n
In the formula, P is a draught pressure, and n is for batching number of times, and α is a distribution ratio;
2b) for mode such as distribution ratio such as reduction ratio such as grade, known sotck thinkness, finished product thickness, the road number of times of batching, wait the reduction ratio formula to be:
In the formula, ε
iFor batching percentage pass reduction, h is a finished product thickness, H
0For batching sotck thinkness, n is for batching number of times, solve every time the reduction ratio that batches passage;
And then obtain to have the thickness of the passage of batching to distribute;
(3) after carrying out all road sub-distribution, carry out the check of power energy parameter and bite condition with the rolling mill practice model, the formula of check is:
P
Wi≤P
W G
i≤G λ
i≤λ
In the formula, P
WiBe the power of certain passage, G
iBe the moment of certain passage, P
WBe rated power, G is a rated moment, λ
iBe the nip angle of certain passage, λ is maximum nip angle; Δ H
iBe draught per pass, R is the working roll radius; If certain percentage pass reduction excess load is then batched and batched two parts and will depress the residual quantity mean allocation to each passage by nothing, check.
2. single-frame double-coiling aluminium hot-rolling mill thickness automatic allocation process according to claim 1, it is characterized in that: the thickness that batches passage for nothing distributes, its weight coefficient also comprises the step 1c that adjusts for artificial to the adjustment of reduction ratio), if first percentage pass reduction is improper, then distribute again from following a time by weight coefficient, if it is improper to batch the reduction ratio of passage, then distribute again from last a time by weight coefficient:
Δh′
i＝γ′
i·H
0·(ε′
0-ε
0)
Δh″
i＝γ″
i·h
0·(ε″
m-ε
m)
In the formula, Δ h
i' headed by every time depresses thickness adjustment amount, γ after the passage adjustment
i' headed by depress thickness after the passage adjustment and adjust weight coefficient, H
0Be supplied materials target thickness, ε
0' headed by percentage pass reduction after the passage adjustment, ε
0Headed by the former percentage pass reduction of passage, Δ h
i" every time depresses thickness adjustment amount, γ for after batching the passage adjustment
i" after batching the passage adjustment, depress thickness adjustment weight coefficient, h
0Be finish to gauge target thickness, ε
m" for batching percentage pass reduction after the passage adjustment, ε
mFor batching the former percentage pass reduction of passage.
3. single-frame double-coiling aluminium hot-rolling mill thickness automatic allocation process according to claim 1 is characterized in that: for the draught pressure distribution ratio mode that the passage of batching is arranged, P
1: P
2: ... P
N-1: P
n=α
1: α
2: ... α
N-1: α
nBy 1: 1: ... distribute at 1: 0.8.
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|---|---|---|---|
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