CN103551389B - Flying gauge change control method of tandem cold mill - Google Patents

Flying gauge change control method of tandem cold mill Download PDF

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CN103551389B
CN103551389B CN201310526275.4A CN201310526275A CN103551389B CN 103551389 B CN103551389 B CN 103551389B CN 201310526275 A CN201310526275 A CN 201310526275A CN 103551389 B CN103551389 B CN 103551389B
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becomes
frame
value
become
change
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CN103551389A (en
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王利国
王胜勇
卢家斌
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Wisdri Wuhan Automation Co Ltd
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Wisdri Wuhan Automation Co Ltd
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Abstract

The invention discloses a flying gauge change control method for a tandem cold mill. The method comprises the following steps of determining a transition region of flying gauge change; calculating a transition coefficient according to the length of the transition region, the original thickness of band steel before rolling of each rack and the set thickness of the band steel after rolling of each rack; in a transition process, calculating a dynamically adjusted roll gap set value of each rack according to the transition coefficient, and regulating the band steel outlet speed of each rack according to reverse flow. By the adoption of the flying gauge change method, a flying gauge change process of the five-rack tandem cold mill can be optimized, the stability of the flying gauge change is improved, equipment impact is reduced, the out-of-tolerance of the band steel is reduced, the speed of the flying gauge change is increased, and the time of the flying gauge change is shortened.

Description

A kind of dynamic variable specification control method of cold continuous rolling
Technical field
The present invention relates to metallurgical automation technology, the dynamic variable specification control method of more particularly, to a kind of cold continuous rolling.
Background technology
Fully continuous type cold continuous rolling can not only roll into the product of identical or different finished product thickness with same raw material, and Different raw materials can also be rolled into the product of identical or different finished product thickness, this requires that it can be dynamic in the operation of rolling Realize product specification conversion.Because if the change of specification can not complete while mill milling, and will be by shutting down Realize, that cannot be referred to as continuous rolling.So dynamic variable specification for realize Fully continuous rolling have very heavy The meaning wanted, it is not only the conventional the most obvious feature of cold continuous rolling of continuous cold tandem rolling mill difference, is also continuous tandem cold mill The core technology that machine produces.
One rational flying gage change strategy, is not only able to ensure milling train quickly accurate implementation specification conversion, Effectively improve product quality and lumber recovery, and transient process can be made steadily, the impact suffered by minimizing equipment.Conversely, Incorrect dynamic variable specification strategy is then likely to result in the decline of product quality, and device parameter fluctuation acutely, is also possible to when serious Broken belt, piling of steel can be caused or the production accident such as repeatedly roll.Therefore, study the dynamic variable specification technology of cold continuous rolling, maintenance is rolled The normal production of machine, realizes continuous rolling, improves product yield, quality has very important significance.
The control mode of dynamic variable specification conversion, can be divided into " following current " by the order of order that each frame carries out becoming specifications control " countercurrently " two kinds.Following current controls the conversion being exactly to complete each frame along roll line direction to control, that is, when change specification point reaches During certain frame, except adjust this frame setting value, so that this frame is transitioned into outside new code, also want following current regulation before also do not have Through each frame speed, to keep former code.It is exactly when change specification point reaches certain frame that adverse current controls, except this machine of regulation The setting value of frame, also will countercurrently adjust below through the setting value of each frame, progressively be transitioned into new code, and before not affecting Face each frame rolling is so as to keep former regulation rolling.
Dynamic variable specification is under the conditions of milling train unit is non-stop-machine, by the roll gap to the new coil of strip needing rolling, speed Degree, the isoparametric dynamic adjustment of tension force, realize the steel grade of adjacent two coiled strip steels, thickness, the conversion of width equal-specification.Dynamic change is advised Than comparatively fast, it will be switched to the rolling of next coiled strip steel within the extremely short time to the process of lattice by the rolling procedure of previous coiled strip steel Code, and roll gap and roller speed repeatedly will being adjusted within this extremely short time, broken belt also to be prevented, folds, hinders roller etc., Therefore, the control of dynamic variable specification is also more complicated.The drawbacks of it overcomes monovolume rolling threading, throws steel operation is hence it is evident that improve The production efficiency of the stability of the operation of rolling, strip quality and milling train.
The control system of tandem mills is divided into three levels, i.e. Rolling Process Automation layer from top to bottom(Referred to as L2, Level2), basic automation layer(Referred to as L1, Level 1)With intelligent control device layer(Abbreviation L0, Level 0).
Rolling Process Automation layer refers in the operation of rolling, by the mathematical modulo using reflection operation of rolling Changing Pattern Type, optimized algorithm and computer technology etc., the whole operation of rolling of continuous reasonable coordination, improves and stabilized product quality, improves The service efficiency of rolling mill equipment produces purpose computer system to reach most economical carrying out.
Basic automation layer control system is exactly to adopt programmable logic controller (PLC)(Referred to as PLC)And various transmission control Control equipment etc. carries out reasonable, timely, accurate control to the plant equipment or hydraulic test of realizing the required various functions of rolling.
Intelligent control device layer be exactly can certain concrete single control function of complete independently, and have and lead to L1 or L2 system The control device colony of news ability.
The production process of tandem mills is as follows:Hot rolled plate through overpickling after the jockey pulley before tandem mill, rolled piece Through rolling-mill housing, finally enter coiling machine.When being up to presetting requirement with coil of strip on coiling machine, whole milling train Section decelerates to shear rate, and just at this moment shearing point runs to the exit of milling train end frame, and strip steel is cut by the flying shear in exit Disconnected, the tail part of band steel of front volume continues to be rolled, and new strip steel head continues to run with batching of entering that another is already prepared to On machine.Previous coiling machine carries out unloading volume, subsequently into SBR after having rolled up strip steel.The new coiling machine rolling up upper coil of strip then accelerates It is rolled down to the speed of regulatory requirements, until the arriving of next shearing point, so goes round and begins again, milling train can be in non-stop-machine situation Under, complete the rolling of different coil of strips.
The control method of several dynamic variable specifications is proposed at present, such as using process control computer model system in document System, solves Nonlinear System of Equations and obtains Varied section, each frame of varied tention adverse current FGC process, the roll gap changing value of each changeover portion, this Plant the optimization problem that dynamic variable specification roll gap dynamic setting method solves setting value, basic automatization control strategy is not carried out Optimize.
For example propose and control plan to become the change specification gantry speed as control targe for the strip tension setting value before specification Slightly, establish the equation becoming specification interstand tension and gantry speed in front and back, and give the speed controlling rule becoming specification frame Rule.
Also have and propose to solve the problems, such as dynamic variable specification based on the optimized algorithm such as neutral net, genetic algorithm.
They have the common ground to be:It is all the disposal ability using process computer, sets up milling train phantom, solve The optimization to setting value for the process computer.And in fact, in the operation of rolling, the change of any tension force all will have influence on strip steel Shut out thickness;And the fluctuation of any thickness, will also result in the change of tension force.Actually one coupling multivariate of cold continuous rolling System.Using the Multivariable Decoupling Control method in modern control theory, the variable of coupling is decoupled, then right respectively They are controlled device design, are methods improving control accuracy.But due to computationally intensive, it is difficult in basic automatization Middle application.
With the development of basic automatization control device, the ability of PLC greatly improves, and computing capability strengthens, during circulation Between shorten.Therefore originally being completed by Process Control System of task some transfer to be completed by basic automation systems, So due to the coordination between each logic function unit more preferably, often obtain more preferable control effect.
The main logic functional unit completing dynamic variable specification control in basic automation layer has gap preset, speed controlling And tension force, these control functions again with the setting value processing function of basic automation layer, strip tracking function, machine The logic function unit and On line inspection instrument etc. such as group main order control have close contact, therefore rely solely on L2 to optimize It is dissatisfactory that dynamic variable specification controls.For pickling milling train Unit erriger, in order to realize dynamic variable specification conversion well, It is necessary to set up the setup algorithm side of the rotating speed of each frame, adjustment amount of roll gap in addition to selecting optimal regulation (control) mode Method.
Content of the invention
The technical problem to be solved in the present invention is for defect of the prior art, provides a kind of cold continuous rolling Dynamic variable specification control method.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of dynamic variable specification control method of cold continuous rolling, comprises the following steps:
1)Determine the transitional region of dynamic variable specification, within the length of described transitional region is set in a frame spacing;
2)Receive the rolling procedure data of L2 in the PLC of five Stands Cold Tandem Mill L1, that is, before and after rolling, two coils need Each frame set roll gap and speed it is assumed that become specification need to be from rolling procedure one(H0, V0;H1, V1;H2, V2;H3, V3; H4, V4;H5, V5), it is transformed into rolling procedure two(H0 ', V0 ';H1 ', V1 ';H2 ', V2 ';H3 ', V3 ';H4 ', V4 ';H5 ', V5’);Wherein,
H0, H1 to H5 represent in rolling procedure one respectively from No. 0 frame, i.e. inlet of rolling mill jockey pulley, No. 1 frame to No. 5 The strip steel exit thickness setting value of frame;
V0, V1 to V5 represent in rolling procedure one and set from the strip steel muzzle velocity of No. 0 frame, No. 1 frame to No. 5 frames Value;
H0 ', H1 ' arrive H5 ' and represent the strip steel exit thickness from No. 0 frame, No. 1 frame to No. 5 frames in rolling procedure two Setting value;
V0 ', V1 ' arrive V5 ' and represent the strip steel muzzle velocity from No. 0 frame, No. 1 frame to No. 5 frames in rolling procedure two Setting value;
3)When transition region passes through milling train, calculate transfer coefficient;Described transfer coefficient is used for calculating and occurs in transient process When this frame dynamic change fixed value of roller slit;
The calculating of transfer coefficient adopts below equation:
k=(Lk)/(L*(H/h));
Wherein, k represents transfer coefficient, LkIt is to pass through machine after the transition region that strip tracking logic function unit calculates is rolled The length of frame, L is the original length before the rolling of this frame of transition region, and H is original thickness before the rolling of this frame for the strip steel, and h is Strip steel is in the thick setting thickness of this frame rolling;The span of transfer coefficient k is between 0 to 1;
4)When transient process occurs, according to transfer coefficient, calculate the fixed value of roller slit of the dynamic adjustment of each frame, press Adverse current adjusts the strip steel muzzle velocity of each frame;Comprise the following steps that:
4.1:When transition region starting point is to No. 1 frame s1, No. 1 machine frame rolling mill have load roll gap be set as S, exit thickness by H1 is changed into H1 ', but V1 keeps constant, and at this moment V0 changes;When transition region terminal leaves when forebay, when forebay rolls The roll gap of machine is terminated with the adjustment of adverse current strip steel muzzle velocity;Adjustment concrete mode is as follows:
S1 sets=(1-k)H1+k*H1’;
V0 becomes 1=(V1*H1’)/H0’;V0d=(1-k)V0+k*V0 becomes 1
S1 setsRepresent when strip steel transition region passes through No. 1 frame, No. 1 frame fixed value of roller slit;
V0 becomes 1Represent the value after the 1st change of V0;
V0d represents value in the 1st change procedure for the V0;
4.2:When transition region starting point is to frame s2, roll gap is changed into S2 ' from S2, and exit thickness is changed into H2 ' from H2, but V2 Keep constant, at this moment V1 changes, and correspondingly V0 changes again;When transition region terminal leaves when forebay, currently The roll gap of machine frame rolling mill is terminated with the adjustment of adverse current strip steel muzzle velocity;Adjustment concrete mode is as follows:
S2 set=(1-k)H2+k*H2’;
V1 becomes 1=(V2*H2’)/H1’;V1d=(1-k)V1+k*V1 becomes 1
V0 becomes 2=(V1 becomes 1*H1’)/H0’;V0d=(1-k)V0 becomes 1+k*V0 becomes 2
S2 setRepresent when strip steel transition region passes through No. 2 frames, No. 2 frame fixed value of roller slit;
V1 becomes 1Represent the value after the 1st change of V1;
V1d represents value in the 1st change procedure for the V1;
V0 becomes 2Represent the value after the 2nd change of V0;
V0d represents value in the 2nd change procedure for the V0;
4.3:When transition region starting point is to frame s3, roll gap is changed into S3 ' from S3, and exit thickness is changed into H3 ' from H3, but V3 Keep constant, at this moment V2 changes, and correspondingly V1 and V0 changes again;When transition region terminal leaves when forebay, The roll gap of current machine frame rolling mill is terminated with the adjustment of adverse current strip steel muzzle velocity;Adjustment concrete mode is as follows:
S3 set=(1-k)H3+k*H3’;
V2 become 1=(V3*H3’)/H2’;V2d=(1-k)V2+k*V2 become 1
V1 becomes 2=(V2 become 1*H2’)/H1’;V1d=(1-k)V1 becomes 1+k*V1 becomes 2
V0 becomes 3=(V1 becomes 2*H1’)/H0’;V0d=(1-k)V0 becomes 2+k*V0 becomes 3
S3 setRepresent when strip steel transition region passes through No. 3 frames, No. 3 frame fixed value of roller slit;
V2 become 1Represent the value after the 1st change of V2;
V2d represents value in the 1st change procedure for the V2;
V1 becomes 2Represent the value after the 2nd change of V1;
V1d represents value in the 2nd change procedure for the V1;
V0 becomes 3Represent the value after the 3rd change of V0;
V0d represents value in the 3rd change procedure for the V0;
4.4:When transition region starting point is to frame s4, roll gap is changed into S4 ' from S4, and exit thickness is changed into H4 ' from H4, but V4 Keep constant, at this moment V3 changes, and correspondingly V2 and V1 and V0 changes again;Work as forebay when transition region terminal leaves When, the roll gap of current machine frame rolling mill is terminated with the adjustment of adverse current strip steel muzzle velocity;Adjustment concrete mode is as follows:
S4 set=(1-k)H4+k*H4’;
V3 become 1=(V4*H4’)/H3’;V3d=(1-k)V3+k*V3 become 1
V2 become 2=(V3 become 1*H3’)/H2’;V2d=(1-k)V2 become 1+k*V2 become 2
V1 becomes 3=(V2 become 2*H2’)/H1’;V1d=(1-k)V1 becomes 2+k*V1 becomes 3
V0 becomes 4=(V1 becomes 3*H1’)/H0’;V0d=(1-k)V0 becomes 3+k*V0 becomes 4
S4 setRepresent when strip steel transition region passes through No. 4 frames, No. 4 frame fixed value of roller slit;
V3 become 1Represent the value after the 1st change of V3;
V3d represents value in the 1st change procedure for the V3;
V2 become 2Represent the value after the 2nd change of V2;
V2d represents value in the 2nd change procedure for the V2;
V1 becomes 3Represent the value after the 3rd change of V1;
V1d represents value in the 3rd change procedure for the V1;
V0 becomes 4Represent the value after the change of V0 the 4th;
V0d represents value in the 4th change procedure for the V0;
4.5:When transition region starting point is to frame s5, roll gap is changed into S5 ' from S5, and exit thickness is changed into H5 ' from H5, but V5 Keep constant, at this moment V4 changes, and correspondingly V3 and V2 and V1 and V0 changes again;When transition region terminal leaves currently During frame, the roll gap of current machine frame rolling mill is terminated with the adjustment of adverse current strip steel muzzle velocity;Adjustment concrete mode is as follows:
S5 set=(1-k)H5+k*H5’;
V4 become 1=(V5*H5’)/H4’;V4d=(1-k)V4+k*V4 become 1
V3 become 2=(V4 become 1*H4’)/H3’;V3d=(1-k)V3 become 1+k*V3 become 2
V2 become 3=(V3 become 1*H3’)/H2’;V2d=(1-k)V2 become 2+k*V2 become 3
V1 becomes 4=(V2 become 2*H2’)/H1’;V1d=(1-k)V1 becomes 3+k*V1 becomes 4
V0 becomes 5=(V1 becomes 3*H1’)/H0’;V0d=(1-k)V0 becomes 4+k*V0 becomes 5
S5 setRepresent when strip steel transition region passes through No. 5 frames, No. 5 frame fixed value of roller slit;
V4 become 1Represent the value after the 1st change of V4;
V4d represents value in the 1st change procedure for the V4;
V3 become 2Represent the value after the 2nd change of V3;
V3d represents value in the 2nd change procedure for the V3;
V2 become 3Represent the value after the 3rd change of V2;
V2d represents value in the 3rd change procedure for the V2;
V1 becomes 4Represent the value after the change of V1 the 4th;
V1d represents value in the 4th change procedure for the V1;
V0 becomes 5Represent the value after the change of V0 the 5th;
V0d represents value in the 5th change procedure for the V0.
The beneficial effect comprise that:
1)By passing through to calculate transfer coefficient in L1, then calculate the dynamic fixed value of roller slit adjusting of each frame, with And the speed setting value that front several strip steel passes through, transient process be divide into the multiple processes that can calculate and control.
2)By the L1 operation of rolling according to the restriction of primary data, target data and rolling procedure, automatically calculate rolling During work roller speed, and control the acceleration of working roll, deceleration, to control milling train completely without manual intervention or operation The speed of working roll, makes the speed controlling in the operation of rolling be foreseeable, is repeatable under identical restrictive condition.
3)Controlled using the regulation that the method that the present invention provides combines Rolling Process Automation layer, a big step can be adjusted Section is converted into the synchronous multiple small size step carrying out and adjusts, and reduces influencing each other between the amplitude of deviation and variable, makes Belt steel thickness during dynamic variable specification, interstand tension fluctuation reduce, raising cold-rolled products quality, performance, degree of accuracy, Improve the stability of transient process, reduce broken belt risk.
Brief description
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Five Stands Cold Tandem Mill equipment component sketches in the pickling milling train Unit erriger that Fig. 1 uses for the embodiment of the present invention;
Fig. 2 be the embodiment of the present invention in transition region through frame schematic diagram;
Fig. 3 is the control flow chart that in the embodiment of the present invention, transition region passes through during 1 frame;
Fig. 4 is the control flow chart that in the embodiment of the present invention, transition region passes through 2 frames;
Fig. 5 is the control flow chart that in the embodiment of the present invention, transition region passes through 3 frames;
Fig. 6 is the control flow chart that in the embodiment of the present invention, transition region passes through 4 frames;
Fig. 7 is the control flow chart that in the embodiment of the present invention, transition region passes through 5 frames.
In figure:1- calibrator;2- laser velocimeter;3- tonometer;4- welding seam detector;5- motorised roll;6- template Instrument.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with drawings and Examples, right The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only in order to explain the present invention, not For limiting the present invention.
Five Stands Cold Tandem Mill equipment component sketches in the pickling milling train Unit erriger that Fig. 1 uses for the present embodiment.
The dynamic variable specification control method step of the present embodiment is as follows:
First, first have to select the transitional region of dynamic variable specification.
When carrying out becoming specifications control, follow the tracks of strip steel and become specification transition region to the distance of each frame, in unit operation When be continually changing.
As shown in Fig. 2 when transition region passes through milling train, calculating transfer coefficient k=(Lk)/(L*(H/h)).
K represents transfer coefficient, LkIt is to pass through frame after the transition region that strip tracking logic function unit calculates is rolled Length, L is the original length before the rolling of this frame of transition region, and H is original thickness before the rolling of this frame for the strip steel, and h is strip steel In the setting thickness that the rolling of this frame is thick.Therefore during transition region passes through this frame, k is progressively changed into 1 from 0.
2nd, assume there are following two codes, received the rolling procedure data of L2 by the PLC of L1;
Code is just like following table:
Code two such as following table:
When transient process occurs, according to transfer coefficient, calculate the fixed value of roller slit of the dynamic adjustment of each frame, by inverse Stream adjusts the strip steel muzzle velocity of each frame.Specific as follows:
As shown in figure 3, step 1, when strip steel transition region passes through No. 1 frame, roll gap sets
S1 sets=(1-k)* S1+k*S1 ', i.e. S=(1-k)*2.4+k*2.1.
No. 0 frame(Inlet of rolling mill jockey pulley)Speed changes desired value for the first time
V0 becomes 1=(V1*H1’)/H0’=1.633*2.1/3=1.143.
No. 0 gantry speed sets
V0d=(1-k)*1.307+k*1.143.
As shown in figure 4, step 2, when strip steel transition region passes through No. 2 frames, roll gap sets
S2 set=(1-k)* S2+k*S2 ', i.e. S=(1-k)*1.92+k*1.47.
No. 1 gantry speed changes desired value for the first time
V1 becomes 1=(V2*H2’)/H1’=2.053*1.47/2.1=1.437.
1 gantry speed sets
V1d=(1-k)*1.633+k*1.437.
No. 0 gantry speed changes desired value for the second time
V0 becomes 2=(V1 becomes 1*H1’)/H0’=1.437*2.1/3=1.006.
No. 0 gantry speed sets
V0d=(1-k)*1.143+k*1.006.
As shown in figure 5, step 3, when strip steel transition region passes through No. 3 frames, roll gap sets
S3 set=(1-k)* S3+k*S3 ', i.e. S=(1-k)*1.54+k*1.03.
No. 2 gantry speed change desired value for the first time
V2 become 1=(V3*H3’)/H2’=2.545*1.03/1.47=1.783.
No. 2 gantry speed set
V2d=(1-k)*2.053+k*1.783.
No. 1 gantry speed changes desired value for the second time
V1 becomes 2=(V2 become 1*H2’)/H1’=1.783*1.47/2.1=1.248.
No. 1 gantry speed sets
V1d=(1-k)*1.437+k*1.248.
No. 0 gantry speed third time changes desired value
V0 becomes 3=(V1 becomes 2*H1’)/H0’=1.248*2.1/3=0.874.
No. 0 gantry speed sets
V0d=(1-k)*1.006+k*0.874.
As shown in fig. 6, step 4, when strip steel transition region passes through No. 4 frames, roll gap sets
S4 set=(1-k)* S4+k*S4 ', i.e. S=(1-k)*1.23+k*0.72.
No. 3 gantry speed change desired value for the first time
V3 become 1=(V4*H4’)/H3’=3.187*0.72/1.03=2.227.
No. 3 gantry speed set
V3d=(1-k)*2.545+k*2.227.
No. 2 gantry speed change desired value for the second time
V2 become 2=(V3 become 1*H3’)/H2’=2.227*1.03/1.47=1.561.
No. 2 gantry speed set
V2d=(1-k)*1.783+k*1.561.
No. 1 gantry speed third time changes desired value
V1 becomes 3=(V2 become 2*H2’)/H1’=1.561*1.47/2.1=1.093.
No. 1 gantry speed sets
V1d=(1-k)*1.248+k*1.093.
The 4th variation desired value of No. 0 gantry speed
V0 becomes 3=(V1 becomes 3*H1’)/H0’=1.093*2.1/3=0.765.
No. 0 gantry speed sets
V0d=(1-k)*0.874+k*0.765.
As shown in fig. 7, step 5, when strip steel transition region passes through No. 5 frames, roll gap sets
S5 set=(1-k)* S4+k*S4 ', i.e. S=(1-k)*0.98+k*0.5.
V4 become 1=(V5*H5’)/H4’.V4d=(1-k)V4+k*V4 become 1.
V3 become 2=(V4 become 1*H4’)/H3’.V3d=(1-k)V3 become 1+k*V3 become 2.
V2 become 3=(V3 become 1*H3’)/H2’.V2d=(1-k)V2 become 2+k*V2 become 3.
V1 becomes 4=(V2 become 2*H2’)/H1’.V1d=(1-k)V1 becomes 3+k*V1 becomes 4.
V0 becomes 5=(V1 becomes 3*H1’)/H0’.V0d=(1-k)V0 becomes 4+k*V0 becomes 5.
No. 4 gantry speed change desired value for the first time
V4 become 1=(V5*H5’)/H4’=4.*0.5/0.72=2.778.
4 gantry speed set
V4d=(1-k)*3.187+k*2.778.
No. 3 gantry speed change desired value for the second time
V3 become 2=(V4 become 1*H4’)/H3’=2.778*0.72/1.03=1.942.
No. 3 gantry speed set
V3d=(1-k)*2.228+k*1.942.
No. 2 gantry speed third times change desired value
V2 become 3=(V3 become 2*H3’)/H2’=1.942*1.03/1.47=1.361.
No. 2 gantry speed set
V2d=(1-k)*1.561+k*1.361.
The 4th variation desired value of No. 1 gantry speed
V1 becomes 4=(V2 become 3*H2’)/H1’=1.361*1.47/2.1=0.952.
No. 1 gantry speed sets
V1d=(1-k)*1.093+k*0.952.
The 5th variation desired value of No. 0 gantry speed
V0 becomes 5=(V1 becomes 4*H1’)/H0’=0.952*2.1/3=0.667.
No. 0 gantry speed sets
V0d=(1-k)*0.765+k*0.667.
It should be appreciated that for those of ordinary skills, can be improved according to the above description or be converted, And all these modifications and variations all should belong to the protection domain of claims of the present invention.

Claims (1)

1. a kind of dynamic variable specification control method of cold continuous rolling, comprises the following steps:
1) determine the transitional region of dynamic variable specification, within the length of described transitional region is set in a frame spacing;
2) in five Stands Cold Tandem Mills, received the rolling procedure data of L2 by the PLC of L1, that is, before and after rolling, two coils need Roll gap and speed that each frame sets;Assume that change specification need to be from rolling procedure one:H0, V0;H1, V1;H2, V2;H3, V3;H4, V4;H5, V5;It is transformed into rolling procedure two:H0 ', V0 ';H1 ', V1 ';H2 ', V2 ';H3 ', V3 ';H4 ', V4 ';H5 ', V5 ';Its In,
H0, H1 to H5 represent that is, inlet of rolling mill jockey pulley, No. 1 frame are to No. 5 frames from No. 0 frame in rolling procedure one respectively Strip steel exit thickness setting value;
V0, V1 to V5 represent the strip steel muzzle velocity setting value in rolling procedure one from No. 0 frame, No. 1 frame to No. 5 frames;
H0 ', H1 ' arrive in H5 ' expression rolling procedure two and set from the strip steel exit thickness of No. 0 frame, No. 1 frame to No. 5 frames Value;
V0 ', V1 ' arrive in V5 ' expression rolling procedure two and set from the strip steel muzzle velocity of No. 0 frame, No. 1 frame to No. 5 frames Value;
3) when transition region passes through milling train, according to the length of transitional region, original thickness before the rolling of this frame for the strip steel and band Steel to calculate transfer coefficient in the thick setting thickness of this frame rolling;Described transfer coefficient is used for calculating when transient process occurs The fixed value of roller slit of this frame dynamic change;
4) when transient process occurs, according to transfer coefficient, calculate the fixed value of roller slit of the dynamic adjustment of each frame, by inverse Stream adjusts the strip steel muzzle velocity of each frame;
Wherein, step 3) in the calculating of transfer coefficient adopt below equation:
K=(Lk)/(L*(H/h));
Wherein, k represents transfer coefficient, LkIt is to pass through frame after the transition region that strip tracking logic function unit calculates is rolled Length, L is the original length before the rolling of this frame of transition region, and H is original thickness before the rolling of this frame for the strip steel, and h is strip steel In the setting thickness that the rolling of this frame is thick;The span of transfer coefficient k is between 0 to 1;
Wherein, step 4) in calculate the fixed value of roller slit of the dynamic adjustment of each frame, go out by the strip steel that adverse current adjusts each frame Mouth speed comprises the following steps that:
4.1) when transition region starting point is to No. 1 frame s1, the load roll gap that has of No. 1 machine frame rolling mill is set as S, and exit thickness is become by H1 For H1 ', but V1 keeps constant, and at this moment V0 changes;When transition region terminal leaves when forebay, current machine frame rolling mill Roll gap is terminated with the adjustment of adverse current strip steel muzzle velocity;Adjustment concrete mode is as follows:
S1 sets=(1-k) H1+k*H1 ';
V0 becomes 1=(V1*H1 ')/H0 ';V0d=(1-k) V0+k*V0 becomes 1
S1 setsRepresent when strip steel transition region passes through No. 1 frame, No. 1 frame fixed value of roller slit;
V0 becomes 1Represent the value after the 1st change of V0;
V0d represents value in the 1st change procedure for the V0;
4.2) when transition region starting point is to frame s2, roll gap is changed into S2 ' from S2, and exit thickness is changed into H2 ' from H2, but V2 protects Hold constant, at this moment V1 changes, correspondingly V0 changes again;When transition region terminal leaves when forebay, current machine The roll gap of rolling mill is terminated with the adjustment of adverse current strip steel muzzle velocity;Adjustment concrete mode is as follows:
S2 set=(1-k) H2+k*H2 ';
V1 becomes 1=(V2*H2 ')/H1 ';V1d=(1-k) V1+k*V1 becomes 1
V0 becomes 2=(V1 becomes 1*H1’)/H0’;V0d=(1-k) V0 becomes 1+k*V0 becomes 2
S2 setRepresent when strip steel transition region passes through No. 2 frames, No. 2 frame fixed value of roller slit;
V1 becomes 1Represent the value after the 1st change of V1;
V1d represents value in the 1st change procedure for the V1;
V0 becomes 2Represent the value after the 2nd change of V0;
V0d represents value in the 2nd change procedure for the V0;
4.3) when transition region starting point is to frame s3, roll gap is changed into S3 ' from S3, and exit thickness is changed into H3 ' from H3, but V3 keeps Constant, at this moment V2 changes, and correspondingly V1 and V0 changes again;When transition region terminal leaves when forebay, currently The roll gap of machine frame rolling mill is terminated with the adjustment of adverse current strip steel muzzle velocity;Adjustment concrete mode is as follows:
S3 set=(1-k) H3+k*H3 ';
V2 become 1=(V3*H3 ')/H2 ';V2d=(1-k) V2+k*V2 become 1
V1 becomes 2=(V2 become 1*H2’)/H1’;V1d=(1-k) V1 becomes 1+k*V1 becomes 2
V0 becomes 3=(V1 becomes 2*H1’)/H0’;V0d=(1-k) V0 becomes 2+k*V0 becomes 3
S3 setRepresent when strip steel transition region passes through No. 3 frames, No. 3 frame fixed value of roller slit;
V2 become 1Represent the value after the 1st change of V2;
V2d represents value in the 1st change procedure for the V2;
V1 becomes 2Represent the value after the 2nd change of V1;
V1d represents value in the 2nd change procedure for the V1;
V0 becomes 3Represent the value after the 3rd change of V0;
V0d represents value in the 3rd change procedure for the V0;
4.4) when transition region starting point is to frame s4, roll gap is changed into S4 ' from S4, and exit thickness is changed into H4 ' from H4, but V4 keeps Constant, at this moment V3 changes, and correspondingly V2 and V1 and V0 changes again;When transition region terminal leaves when forebay, The roll gap of current machine frame rolling mill is terminated with the adjustment of adverse current strip steel muzzle velocity;Adjustment concrete mode is as follows:
S4 set=(1-k) H4+k*H4 ';
V3 become 1=(V4*H4 ')/H3 ';V3d=(1-k) V3+k*V3 become 1
V2 become 2=(V3 become 1*H3’)/H2’;V2d=(1-k) V2 become 1+k*V2 become 2
V1 becomes 3=(V2 become 2*H2’)/H1’;V1d=(1-k) V1 becomes 2+k*V1 becomes 3
V0 becomes 4=(V1 becomes 3*H1’)/H0’;V0d=(1-k) V0 becomes 3+k*V0 becomes 4
S4 setRepresent when strip steel transition region passes through No. 4 frames, No. 4 frame fixed value of roller slit;
V3 become 1Represent the value after the 1st change of V3;
V3d represents value in the 1st change procedure for the V3;
V2 become 2Represent the value after the 2nd change of V2;
V2d represents value in the 2nd change procedure for the V2;
V1 becomes 3Represent the value after the 3rd change of V1;
V1d represents value in the 3rd change procedure for the V1;
V0 becomes 4Represent the value after the change of V0 the 4th;
V0d represents value in the 4th change procedure for the V0;
4.5) when transition region starting point is to frame s5, roll gap is changed into S5 ' from S5, and exit thickness is changed into H5 ' from H5, but V5 keeps Constant, at this moment V4 changes, and correspondingly V3 and V2 and V1 and V0 changes again;Work as forebay when transition region terminal leaves When, the roll gap of current machine frame rolling mill is terminated with the adjustment of adverse current strip steel muzzle velocity;Adjustment concrete mode is as follows:
S5 set=(1-k) H5+k*H5 ';
V4 become 1=(V5*H5 ')/H4 ';V4d=(1-k) V4+k*V4 become 1
V3 become 2=(V4 become 1*H4’)/H3’;V3d=(1-k) V3 become 1+k*V3 become 2
V2 become 3=(V3 become 1*H3’)/H2’;V2d=(1-k) V2 become 2+k*V2 become 3
V1 becomes 4=(V2 become 2*H2’)/H1’;V1d=(1-k) V1 becomes 3+k*V1 becomes 4
V0 becomes 5=(V1 becomes 3*H1’)/H0’;V0d=(1-k) V0 becomes 4+k*V0 becomes 5
S5 setRepresent when strip steel transition region passes through No. 5 frames, No. 5 frame fixed value of roller slit;
V4 become 1Represent the value after the 1st change of V4;
V4d represents value in the 1st change procedure for the V4;
V3 become 2Represent the value after the 2nd change of V3;
V3d represents value in the 2nd change procedure for the V3;
V2 become 3Represent the value after the 3rd change of V2;
V2d represents value in the 3rd change procedure for the V2;
V1 becomes 4Represent the value after the change of V1 the 4th;
V1d represents value in the 4th change procedure for the V1;
V0 becomes 5Represent the value after the change of V0 the 5th;
V0d represents value in the 5th change procedure for the V0.
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