CN105436211B

CN105436211B - The roll reversing roller group plate shape closed-loop feedback control method of single chassis six

Info

Publication number: CN105436211B
Application number: CN201510953702.6A
Authority: CN
Inventors: 石晓东; 王国成; 左开红
Original assignee: Taiyuan Heavy Industry Co Ltd
Current assignee: Taiyuan Heavy Industry Co Ltd
Priority date: 2015-12-17
Filing date: 2015-12-17
Publication date: 2017-07-14
Anticipated expiration: 2035-12-17
Also published as: CN105436211A

Abstract

Present disclose provides a kind of roll reversing roller group plate shape closed-loop feedback control method of single chassis six.The method comprising the steps of：S1. the fundamental characteristics parameter of the roll reversing roller group of single chassis six is obtained and the fundamental characteristics parameter for the current standby strip rolled of being sampled according to predetermined period；S2. parameter related to belt plate shape calculating in the collection operation of rolling, and calculate belt plate shape Distribution Value with reference to the fundamental characteristics parameter obtained in the step S1 and store；S3. the belt plate shape is adjusted according to the belt plate shape Distribution Value and target flatness value that are obtained in the step S2, and judges whether the belt plate shape after regulation meets preparatory condition：If it is not, being transferred to step S2.For part six-roller reversing cold-rolling mill train be investment reduction cost without configure plate-shaped sensing roller in the case of, the present invention can preferably solve the problems, such as its plate shape closed loop feedback control.

Description

The roll reversing roller group plate shape closed-loop feedback control method of single chassis six

Technical field

This disclosure relates to machining technology field, and in particular to a kind of roll reversing roller group plate shape closed loop of single chassis six is anti- Present control method.

Background technology

Single chassis six-roller reversing cold-rolling mill train is so that its Product Precision is high, cost of investment is low, take up an area small scale, produce motor-driven spirit Living the advantages of, enjoy the favor of middle-size and small-size iron and steel enterprise.As shown in fig. 1, single chassis six-roller reversing cold-rolling mill train mainly includes： Uncoiler 1, entrance coiling machine 2, entrance detection device 3, milling train main frame 4, outlet detection device 5, outlet coiling machine 6 and coil of strip The other equipments such as handling facilities 7.Wherein, in the detection device of entry and exit, Some Enterprises is save early stage cost input, often Reserve plate-shaped sensing roller position and wouldn't be installed.So, the strip shape quality of strip only rely on operating personnel experience and In ability, and process automation system Mathematical Modeling to bending roller force, roll shifting amount is isoparametric is preset to ensure.And Then without adjust automatically in the operation of rolling, therefore closed loop feedback control can not be carried out to plate shape, easily cause strip precision Grade declines, it is inferior the problems such as, and hinder its product in the application in middle and high end field, be unfavorable for enterprise's long term growth.

Regarding to the issue above, proposed in Publication No. 102049418A Chinese invention patent a kind of " based on flatness defect The semi-automatic adjusting method of plate shape " technical scheme.Pointed out in the technical scheme, when operating personnel's visual finding, certain plate shape lacks After falling into, corresponding flatness defect in control interface is manually selected, then profile regulation mechanism is adjusted control system, and operates Personnel need to determine the regulating time of the flatness defect according to the degree weight of defect.The technical scheme is improved in plate-shaped sensing roller In the case of Strip Shape Control ability, but simultaneously it can also be seen that its concrete operations and defect estimation etc. still rely on operator People's ability and experience, automaticity are low, differentiate that ageing and accuracy rate is poor.

The content of the invention

The purpose of the disclosure is to provide a kind of roll reversing roller group plate shape closed-loop feedback control method of single chassis six, is used for One or more problems caused by limitation and the defect due to correlation technique are at least overcome to a certain extent.The present invention is provided The roll reversing roller group plate shape closed-loop feedback control method of single chassis six include step：

S1. obtain the fundamental characteristics parameter of the roll reversing roller group of single chassis six and sampled current standby roll according to predetermined period The fundamental characteristics parameter of strip；

S2. parameter related to belt plate shape calculating in the collection operation of rolling, and with reference to the base obtained in the step S1 This characterisitic parameter calculates belt plate shape Distribution Value and stored；

S3. according to the belt plate shape Distribution Value and target flatness value obtained in the step S2 to the band steel plate Shape is adjusted, and judges whether the belt plate shape after regulation meets preparatory condition：If it is not, being transferred to step S2.

The roll reversing roller group plate shape closed-loop feedback control method of single chassis six that the example embodiment of the disclosure is provided, For part six-roller reversing cold-rolling mill train be investment reduction cost without configure plate-shaped sensing roller in the case of, can preferably solve Its plate shape closed loop feedback control problem.The present invention makes full use of milling train gateway calibrator data under the premise of equipment is not increased, The calculating of plate shape is realized, recognizes, automatically control the functions such as response, closed loop feedback control, and computational methods are succinct, response speed It hurry up, while being easily programmed realization, cost input is minimum, effect is obvious, with larger practical value.

Brief description of the drawings

Fig. 1 is the primary structure schematic diagram of the roll reversing roller group of single chassis six；

Fig. 2 is a kind of roll reversing roller group plate shape closed-loop feedback control method of single chassis six in disclosure example embodiment Schematic flow sheet；

Fig. 3 is the step S1 of method in Fig. 2 schematic flow sheet；

Fig. 4 is the step S2 of method in Fig. 2 schematic flow sheet；

Fig. 5 is each bending roller force effect schematic diagram of the roll reversing roller group of single chassis six；

Fig. 6 is the step S3 of method in Fig. 2 schematic flow sheet；

Fig. 7 is the schematic flow sheet of step S32f in Fig. 6；

Fig. 8 is the schematic flow sheet of step S32g in Fig. 6；

Fig. 9 is the schematic flow sheet of step S32h in Fig. 6；

Figure 10 is the schematic flow sheet of step S32m in Fig. 6；

Figure 11 is the schematic flow sheet of step S32n in Fig. 6；

Figure 12 is the schematic flow sheet of step S32p in Fig. 6；

Figure 13 is the schematic flow sheet of step S32r in Fig. 6；

Figure 14 is that strip section processing opinion calculates plate shape distribution schematic diagram；

Figure 15 is default target flatness curve synoptic diagram；

Figure 16 is average plate shape distribution and its matched curve figure at a strip section；

Figure 17 is processing opinion calculating plate shape distribution schematic diagram in strip section in example embodiment two；

Figure 18 is average plate shape distribution and its matched curve figure at strip section in example embodiment two.

Embodiment

Example embodiment is described more fully with referring now to accompanying drawing.However, example embodiment can be with a variety of shapes Formula is implemented, and is not understood as limited to embodiment set forth herein.

In the roll reversing roller group of single chassis six, for plate shape measurement problem, except manual observation and pass through flatness detection Roller is carried out outside direct measurement to milling train outlet side plate shape, can also (this function can be by milling train one by collecting actual rolling parameter Level basic automation systems are completed), then calculated using certain theoretical formula, belt plate shape is drawn indirectly.It is especially right Calibrator typically is fitted with six-roller reversing cold-rolling mill train, its gateway detection device, the section thickness of strip can be entered Row multi-site data measures (data are generally used for the closed loop feedback control of strip profile), and the section thickness Distribution Value of the strip Belt plate shape can be brought directly to and calculate theoretical formula (Lian Jiachuan, the Liu Hong people's AGC-ASC system weapon industries publishing house .1995), so as to greatly simplify the calculating process being distributed during pure theory is derived to exit thickness, belt plate shape is calculated for quick It is highly beneficial.And by the parameter used when plate shape is calculated is all from actual measurement data, therefore plate shape calculation has There is high accuracy.

Based on this, for the roll reversing roller group part of generating units of single chassis six because that can not realize that plate shape is closed without plate-shaped sensing roller The problem of ring feedback control, the present invention make full use of in steel rolling mill's production management system one-level basic automatization and Secondary process from The correlation function of dynamicization, on the basis of creation data needed for real-time collecting and technical parameter, passes through the conversion of thickness of slab and plate shape Relation, obtains milling train outlet belt plate shape indirectly.Then, according to obtained belt plate shape Distribution Value and target flatness value to institute State belt plate shape and carry out feedback control regulation.The technical scheme in the documents present invention carries out further below in conjunction with the accompanying drawings Explanation.

As shown in Figure 2, it is the roll reversing roller group plate shape closed loop feedback control side of single chassis six in this example embodiment The flow chart of method；It mainly includes step：

Below, above steps is described in detail respectively.

As shown in Figure 3, in this example embodiment, above-mentioned steps S1 can include：

S11. the fundamental characteristics parameter of six-roller reversing cold-rolling mill train is collected.With reference to shown in Fig. 1, entrance coiling machine can be collected Center is to milling train centre distance S₁, reel diameter R when entrance coiler sector plate stings taut band steel₁, outlet coiling machine center is to rolling Machine centre distance S₂, reel diameter R when outlet coiler sector plate stings taut band steel₂Deng；Also collect six-roller reversing cold-rolling mill train one In level basic automation systems, the maximum positive bending roller force of working rollThe negative bending roller force of working roll maximumMiddle roll bending cylinder Maximum bending roller force B_Mmax, the sensing equipment such as force snesor and velocity sensor sampling period T_s(generally, 5ms≤T_s≤20ms) Etc..

S12. the current standby strip fundamental characteristics parameter rolled is collected, including：Coil of strip reel number N where it_coil, strip Width B_coil, supplied materials thickness h₀Etc..

S13. define and default plate shape calculates sampling period T_cAnd plate shape feedback control cycle T_f；This example embodiment In can be：2*T_s≤T_c≤4*T_s, 250*T_c≤T_f≤500*T_c。

As shown in Figure 4, in this example embodiment, above-mentioned steps S2 can include：

S21. the plate shape storage file with the fundamental characteristics parameter association of the standby strip rolled is created；For example, establishment file name For N_coilPlate shape storage file.

S22. enter plate shape and calculate SBR.

S23. judge whether to start rolling：

If so, being transferred to step S24；If it is not, being transferred to step S22.

For reversing cold rolling mill, it is considered that after coiler sector plate stings taut band steel, spool turns over three circles, i.e., Threading terminates, and sets up front and rear tension force and starts rolling.The signal for starting rolling generally feeds back to process Department of Automation by coiling machine System.

S24. current mill speed v, the entrance thickness of slab Distribution Value H collected by basic automation systems is collected_iAnd go out Oralia thickness Distribution Value h_i；Wherein, i is that, with steel bar member number, i=1,2 ..., n-1, n, n is bar member sum.Bar member sum is by strip Corresponding gauge head quantity is determined on width and calibrator；Following tension force and plate shape cross direction profiles calculate the division side of bar member used Method is also identical with this.

S25. current data sample point is calculated in strip length with reference to the parameter gathered in the step S11 and step S24 On position.For example, position P of the Current data collection point on strip length can be calculated according to (formula 1)_j, j is position ginseng Number, wherein j=0,1,2 ..., m-1, m, m are that plate shape calculates total number of sample points.

P_j=P_j-1+v·T_c(formula 1)

Wherein, when carrying out this rolling of even number road, P₀=S₂+3×2πR₂；When carrying out this rolling of even number road, P₀= S₁+3×2πR₁。

S26. the result with reference to the step S25 calculates outlet plate shape Distribution Value of the strip at j positions.For example, can be with The horizontal plate shape Distribution Value L in outlet of the strip at j positions is calculated according to (formula 2)_ji, L_jiIt is that plate shape Distribution Value in units of I is counted Calculation method.

Wherein, outlet tension force cross direction profiles value σ of the strip at j positions_1jiAs shown in formula (3)：

(formula 3) is substituted into (formula 2), abbreviation can be obtained (formula 4)

Wherein, strip average thickness is exportedFor：

Wherein, strip steel at entry average thicknessFor：

It should be noted that in the present invention, plate shape calculating section such as being scheduled on into milling train center, (formula 4) formula is used The outlet detected during calculating by calibrator and strip steel at entry thickness and the actual plate thickness distribution number of non-present calculating section both sides According to, but in view of the actual range at gateway calibrator and milling train center is smaller and during thin plate rolling thickness of slab, plate shape larger Stability in length of interval, therefore the measured value can be approximately used, it influences little to computational accuracy.

Wherein, the length average value of incoming profileFor：

E_iFor the length of supplied materials, unit mm, for the first passes in reversible rolling, due to supplied materials length not Know, it is therefore assumed thatAnd calculated for each passage thereafter, the outlet tension force cross direction profiles value of preceding a time can be brought into, its Ratio withIt is identical.In the roll reversing roller group of single chassis six, because adjacent two passages time interval is larger, there is enough The Data Post time, it is easy to processing and application to preceding a time board form data.And multi-frame continuous rolling does not possess this then One advantage.

S27. by the plate shape Distribution Value L at j positions_ji, correspondence position P_jAnd corresponding time T_jWrite the plate shape storage File N_coilAnd preserve；Wherein, T_jThe Beijing time built in system, it is accurate to millisecond.

S28. equation △ t are judged_f=T_fWhether set up：

If so, being transferred to step S29 and step S3；If it is not, being only transferred to step S29.

Wherein, △ t_fFor plate shape feedback interval, it can be obtained by the stepping of computer system minimum interval is cumulative. It should be noted that " being transferred to step S29 and step S3 " and representing two parallel process of step S3 after step S29, both solely It is vertical to contact again.

S29. equation △ t are judged_c=T_cWhether set up：

If so, making △ t_c=0, j=j+1, and it is transferred to step S24；If it is not, repeat step S29.

Wherein, △ t_cSampling time interval is calculated for plate shape, can be added up by computer system minimum interval stepping Obtain.

In this example embodiment, preferably by each of the roll reversing roller group of single chassis six in above-mentioned steps S3 Bending roller force optimizes adjustment and the belt plate shape is adjusted.Why bending roller force adjustment is selected as profile regulation Technical way has following reason：Exemplified by applying more UCM types for current reversing cold rolling mill, its belt plate shape Main regulating measure include：The axial roll shifting of the positive and negative bending roller force of working roll, the positive bending roller force of intermediate calender rolls, intermediate calender rolls, sub-sectional cooling etc.. Wherein, intermediate roll shifting can only be adjusted in milling train not on-load, typically be preset by Mathematical Modeling；Segmentation Mainly a kind of plate shape fine adjustment auxiliary control device of cooling, such as micro-control to high order (three times and four times) plate shape curve；And Regulation to roll bending roller force, is mainly realized by roll-bending cylinder, is characterized in that online adjustable, Real-time Feedback, control are accurate And effect substantially etc..Therefore, present invention controlled quentity controlled variable involved in plate shape feedback control regulation mainly includes milling train operation Side A and driving side B working roll (top working roll 22, bottom working roll 23) positive and negative bending roller force, intermediate calender rolls (upper intermediate calender rolls 21, it is lower in Between roller 24) positive bending roller force this 4 pairs of parameter (as shown in Figure 5, wherein sign 20 is strip).

In this example embodiment, above-mentioned steps S3 can include：

S31. obtain the progress bending roller force and optimize and revise required data；As shown in Figure 6, the step can be wrapped again Include：

S31a. T before being extracted from basic automation systems_fEach bending roller force setting value in time, including fore side working roll Bending roller force B_OW, fore side intermediate calender rolls bending roller force B_OM, driving side work roll bending power B_DWAnd driving side intermediate calender rolls bending roller force B_DM。 Wherein, B is worked as_OW>It is positive bending roller force when 0, works as B_OW<It is negative bending roller force, B when 0_Wmin≤B_OW≤B_Wmax, driving side is identical with this.

S31b. from the plate shape storage file N_coilT before middle extraction_fAll board form data L in time_ji, common T_f/T_cIt is individual.

S31c. the default target flatness L of extraction process personnel from process automation system_ti, its expression formula can be such as (formula 8) shown in.

Wherein, a₁、a₂、a₃、a₄、a₅For target flatness parameter of curve, a₄=a₅=0, a₃>0；x_iSat for band steel bar member is relative Mark,

It should be noted that because bending roller force is adjusted to the secondary Strip Shape Control effect of strip substantially, and to three, four plates Shape control is weaker, and board form data used is obtained indirectly on the basis of plate shape computational theory in the present invention, relative to plate shape Measuring roll direct measurement value, its degree of accuracy is poor, therefore the present invention only selects to be controlled the secondary plate shape of strip, i.e. target Plate shape parameter a₄=a₅=0.So, that is, the time used by reducing follow-up calculate, it in turn simplify the logic judgment of bending roller force control. In addition, during thin plate rolling, for ease of curling and roll control, while reducing roller consumption, typically being controlled by micro- bilateral wave System, i.e. target flatness curve opening upwards (a₃>0)。

S32. according to the data obtained in the step S31, to the unit for the purpose of obtaining the target flatness value Each bending roller force of the roll reversing roller group of frame six optimizes adjustment, and it can mainly include plate shape automatic identification, automatically control sound Should, the function such as closed loop feedback control.As shown in Figure 6, the step can include again：

S32a. T before calculating_fAverage plate shape Distribution Value in timeIts computing formula such as (formula 9)：

S32b. will average plate shape Distribution ValueThe average plate shape curve of secondary first is fitted to, such as (formula 10)：

Wherein, b₁、b₂、b₃For the parameter of the first average plate shape curve.

S32c. judge whether the described first average plate shape curve is identical with the opening direction of a target flatness curve, that is, sentences Disconnected inequality b₃>Whether 0 set up：

If it is not, being then transferred to step S32d；If so, being then transferred to step S32j.

S32d. judge whether the degree of asymmetry of the described first average plate shape curve is overproof, that is, judges inequality ψ>ψ_setWhether Set up：If so, being then transferred to step S32e；If it is not, being then transferred to step S32h.

Wherein, ψ is the degree of asymmetry of the first average plate shape curve, its expression formula such as (formula 11)；ψ_setIt is default for degree of asymmetry Franchise.

S32e. judge the asymmetric direction of the described first average plate shape curve, that is, judge inequality Whether set up：

If so, being then fore side, then step S32f is transferred to；If it is not, being then driving side, then step S32g is transferred to.For this Invention, for convenience of description, it is assumed that band steel bar member i=1 sides are fore side, i=n sides are driving side.

S32f. to fore side work roll bending power to negative direction step by step modulating, to fore side intermediate calender rolls bending roller force to reduction Direction step by step modulating；Step instruction is extracted successively sends the calculating of multigroup (such as 3 groups) plate shape after the scheduled time (such as 0.1s) It is worth and judges whether the degree of asymmetry of its average plate shape curve is overproof：

If so, repeat step S32f；If it is not, being transferred to step S32h.

Wherein, when the above-mentioned scheduled time (such as 0.1s) is mainly the response for considering current Hydraulic Roll-bending system Between.

A kind of step S32f example embodiment is shown in Fig. 7.As shown in Figure 7, it mainly includes：

S32f1. the basic adjustment unit △ B of work roll bending power are set_W, the basic adjustment unit △ B of intermediate calender rolls bending roller force_M。

S32f2. the actual adjustment unit of evaluation work roll bending powerIntermediate calender rolls bending roller force is adjusted substantially Whole unit

S32f3. the result in the step S32f1 and S32f2 calculates current operation side working roll and middle roll bending Roller power setting value B '_OWWith B '_OM；For example calculate current operation side work roll bending power setting value Fore side intermediate calender rolls bending roller force setting value

S32f4. inequality is judgedWhether set up：

If so, being transferred to step S32f5；If it is not, orderIt is transferred to step S32f5；

S32f5. 0≤B ' of inequality is judged_OM≤B_MmaxWhether set up：

If so, being transferred to step S32f6；If it is not, making B '_OM=0, it is transferred to step S32f6；

S32f6. equation set is judgedWhether set up：

If so, then feeding back current each bending roller force setting value to process automation system, and kept in this feedback cycle The setting value, is transferred to step S28；If it is not, being transferred to step S32f7；

S32f7. by current bending roller force setting value B '_OWWith B '_OMProcess automation system bending roller force setting module is fed back to, And by hydraulic system action executing；

S32f8. from the plate shape storage file N_coilIn extract step instruction successively and send after the scheduled time (for example The average plate shape of multigroup (such as 3 groups) plate shape calculated value and calculating 0.1s)And it is fitted to the second average plate shape curve；

S32f9. judge whether the degree of asymmetry of the described second average plate shape curve is overproof, that is, judges inequality ψ>ψ_setIt is It is no to set up：

If so, being transferred to step S32f3；If it is not, being transferred to step S32h.

Wherein, ψ is the degree of asymmetry of the second average plate shape curve, and its expression formula is similar (formula 11)；ψ_setIt is pre- for degree of asymmetry If franchise.

S32g. to driving side work roll bending power to negative direction step by step modulating, to driving side intermediate calender rolls bending roller force to reduction Direction step by step modulating；Step instruction is extracted successively sends the calculating of multigroup (such as 3 groups) plate shape after the scheduled time (such as 0.1s) It is worth and judges whether the degree of asymmetry of its average plate shape curve is overproof：

If so, repeat step S32g；If it is not, being transferred to step S32h.

A kind of step S32g example embodiment is shown in Fig. 8.As shown in Figure 8, its step and scheme class in Fig. 7 Seemingly, simply bending roller force adjustment fades to driving side by fore side.

S32h. to the work roll bending power of fore side and driving side to negative direction step by step modulating, to roll bending in the middle of both sides Power to reduce direction step by step modulating；Step instruction is extracted successively to send multigroup (such as 3 groups) after the scheduled time (such as 0.1 second) Plate shape calculated value simultaneously calculates average plate shapeAnd it is fitted to the second average plate shape curve.

A kind of step S32h example embodiment is shown in Fig. 9.As shown in Figure 9, its step and scheme class in Fig. 7 Seemingly, simply bending roller force adjustment fades to fore side and driving side by single operation side, and cancels the overproof judgement of last degree of asymmetry Step, is transferred to step S32i.

S32i. judge whether the described second average plate shape curve deviation is less than plate shape deviation franchise, that is, judge inequality δ ' ≤δ_setWhether set up：

If so, then feeding back current each bending roller force setting value to process automation system, and kept in this feedback cycle The setting value, is transferred to step S28；Otherwise, it is transferred to step S32h.

Wherein, δ ' is the second plate shape curve deviation, its computing formula such as (formula 12)；δ_setFor plate shape deviation franchise.

S32j. judge whether the described first average plate shape curve deviation is less than plate shape deviation franchise, that is, judge inequality δ≤ δ_setWhether set up：

If so, being transferred to step S28；If it is not, being transferred to step S32k.

Wherein, δ is the first average plate shape curve deviation, its computing formula such as (formula 13).

S32k. judge whether the degree of asymmetry of the described first average plate shape curve is overproof, that is, judges inequality ψ>ψ_setWhether Set up：If so, being then transferred to step S32l；If it is not, being then transferred to step S32o.

S32l. judge the asymmetric direction of the described first average plate shape curve, that is, judge inequality Whether set up：

If so, being then fore side, then step S32m is transferred to；If it is not, being then driving side, then step S32n is transferred to.For this Invention, for convenience of description, it is assumed that band steel bar member i=1 sides are fore side, i=n sides are driving side.

S32m. to fore side work roll bending power to positive direction step by step modulating, to fore side intermediate calender rolls bending roller force to increase Direction step by step modulating, extracts step instruction and sends the calculating of multigroup (such as 3 groups) plate shape after the scheduled time (such as 0.1 second) successively It is worth and judges whether the degree of asymmetry of its average plate shape curve is overproof：

If so, repeat step S32m；If it is not, being transferred to step S32o.

A kind of step S32m example embodiment is shown in Figure 10.As shown in Figure 10, it mainly includes：

S32m1. the basic adjustment unit △ B of work roll bending power are set_W, the basic adjustment unit △ B of intermediate calender rolls bending roller force_M。

S32m2. the actual adjustment unit of evaluation work roll bending powerIntermediate calender rolls bending roller force is adjusted substantially Whole unit

S32m3. current operation side work roll bending power setting value is calculatedOperation Side intermediate calender rolls bending roller force setting value

S32m4. inequality is judgedWhether set up：

If so, being transferred to step S32m5；If it is not, orderIt is transferred to step S32m5；

S32m5. 0≤B ' of inequality is judged_OM≤B_MmaxWhether set up：

If so, being transferred to step S32m6；If it is not, making B '_OM=B_Mmax, it is transferred to step S32m6；

S32m6. equation set is judgedWhether set up：

If so, being transferred to step S28；If it is not, being transferred to step S32m7；

S32m7. by current bending roller force setting value B '_OWWith B '_OMProcess automation system bending roller force setting module is fed back to, And by hydraulic system action executing；

S32m8. extract step instruction successively from the plate shape storage file and send multigroup plate shape meter after the scheduled time Calculation value simultaneously calculates average plate shape and is fitted to the second average plate shape curve；

S32m9. judge whether the degree of asymmetry of average plate shape curve is overproof：

If so, being transferred to step S32m3；If it is not, being transferred to step S32o.

Wherein, ψ is the degree of asymmetry of average plate shape curve, and its expression formula is similar to (formula 11)；ψ_setIt is default for degree of asymmetry Franchise.

S32n. to driving side work roll bending power to positive direction step by step modulating, to driving side intermediate calender rolls bending roller force to increase Direction step by step modulating；Step instruction is extracted successively to send multigroup plate shape calculated value after the scheduled time and judge that its average plate shape is bent Whether the degree of asymmetry of line is overproof：

If so, repeat step S32n；If it is not, being transferred to step S32o.

A kind of step S32n example embodiment is shown in Figure 11.As shown in Figure 11, its step and side in Figure 10 Case is similar, and simply bending roller force adjustment fades to driving side by fore side.

S32o. judge whether the amplitude of average plate shape curve exceedes default amplitude, that is, judge inequalityIt is It is no to set up：If so, being then transferred to step S32p；Otherwise, it is transferred to step S32r.

S32p. to the work roll bending power of fore side and driving side to positive direction step by step modulating, to roll bending in the middle of both sides Power is extracted step instruction and sent multigroup (such as 3 groups) after the scheduled time (such as 0.1 second) successively to augment direction step by step modulating Plate shape calculated value simultaneously calculates average plate shapeAnd it is fitted to the second average plate shape curve.

A kind of step S32p example embodiment is shown in Figure 12.As shown in Figure 12, its step and side in Figure 11 The similar simply bending roller force adjustment of case fades to fore side and driving side by single operation side, and cancels that last degree of asymmetry is overproof to be sentenced Disconnected step, is transferred to step S32q.

S32q. judge whether the described second average plate shape curve deviation is less than plate shape deviation franchise, that is, judge inequality δ ' ≤δ_setWhether set up：

If so, then feeding back current each bending roller force setting value to process automation system, and kept in this feedback cycle The setting value, is transferred to step S28；Otherwise, it is transferred to step S32p.

Wherein, δ ' is the described second average plate shape curve deviation, its computing formula such as (formula 12)；δ_setPermit for plate shape deviation Difference.

S32r. to the work roll bending power of fore side and driving side to negative direction step by step modulating, to roll bending in the middle of both sides Power to reduce direction step by step modulating；Step instruction is extracted successively to send multigroup (such as 3 groups) after the scheduled time (such as 0.1 second) Plate shape calculated value simultaneously calculates average plate shapeAnd it is fitted to the second average plate shape curve.

A kind of step S32r example embodiment is shown in Figure 13.As shown in Figure 13, it mainly includes：

S32r1. working roll and the basic adjustment unit of intermediate calender rolls bending roller force are set；

S32r2. evaluation work roller and the actual adjustment unit of intermediate calender rolls bending roller force；

S32r3. the result in the step S32r1 and S32r2 calculates current operation side working roll and middle roll bending Roller power setting value B '_OWWith B '_OM；

S32r4. inequality is judgedWhether set up：

If so, being transferred to step S32r5；If it is not, orderIt is transferred to step S32r5；

S32r5. 0≤B ' of inequality is judged_OM≤B_MmaxWhether set up：

If so, being transferred to step S32r6；If it is not, making B '_OM=0, it is transferred to step S32r6；

S32r6. inequality is judgedWhether set up：

If so, being transferred to step S32r7；If it is not, orderIt is transferred to step S32r7；

S32r7. 0≤B ' of inequality is judged_DM≤B_MmaxWhether set up：

If so, being transferred to step S32g8；If it is not, making B '_DM=0, it is transferred to step S32g8；

S32r8. equation set is judgedWhether set up：

If so, being transferred to step S28；If it is not, being transferred to step S32r9；

S32r9. by current bending roller force setting value B '_OWWith B '_OMProcess automation system bending roller force setting module is fed back to, And by hydraulic system action executing；

S32r10. extract step instruction successively from the plate shape storage file and send multigroup plate shape meter after the scheduled time Calculation value simultaneously calculates average plate shape and is fitted to the second average plate shape curve；It is transferred to step S32s.

Such scheme is similar with scheme in Figure 11, and simply bending roller force adjustment fades to fore side and driving by single operation side Side, adjustment direction on the contrary, and cancel the overproof judgement step of last degree of asymmetry, be transferred to step S32s.

S32s. judge whether the described second average plate shape curve deviation is less than plate shape deviation franchise, that is, judge inequality δ ' ≤δ_setWhether set up：

If so, then feeding back current each bending roller force setting value to process automation system, and kept in this feedback cycle The setting value, is transferred to step S28；Otherwise, it is transferred to step S32r.

Wherein, δ ' is feedback plate shape curve deviation, its computing formula such as (formula 12)；δ_setFor plate shape deviation franchise.

For the application process of the further instruction present invention, now by taking two actual example embodiments as an example, to this hair Bright specific implementation process is described in more details.

Example embodiment one

S1. obtain the fundamental characteristics parameter of the roll reversing roller group of single chassis six and sampled current standby roll according to predetermined period The fundamental characteristics parameter of strip：

S11. the fundamental characteristics parameter of six-roller reversing cold-rolling mill train is collected.With reference to shown in Fig. 1, entrance coiling machine center is collected To milling train centre distance S₁=5.5m, entrance coiler sector plate sting reel diameter R during taut band steel₁=330mm, outlet are batched Machine center is to milling train centre distance S₂=5m, reel diameter R when outlet coiler sector plate stings taut band steel₂=330mm etc., Also collect in six-roller reversing cold-rolling mill train one-level basic automation systems, the maximum positive bending roller force of working rollWork The negative bending roller force of roller maximumThe maximum bending roller force B of middle roll bending cylinder_Mmax=380kN, force snesor and speed are passed The sampling period T of the sensing equipments such as sensor_s=5ms；

S12. the current standby strip fundamental characteristics parameter rolled is collected, including：Coil of strip reel number N where it_coil= 04249850, strip width B_coil=1260mm, supplied materials thickness h₀=2.247mm；

S13. define and default plate shape calculates sampling period T_c=2*T_s=10ms, plate shape feedback control cycle T_f=800* T_c=8s；

S2. parameter related to belt plate shape calculating in the collection operation of rolling, and with reference to the base obtained in the step S1 This characterisitic parameter calculates belt plate shape Distribution Value and stored：

S21. the entitled N of establishment file_coil=04249850 plate shape storage file；

S22. enter plate shape and calculate SBR；

S23. judge whether to start rolling：

S24. mill speed v=12.651m/s, entrance thickness of slab point that the moment is collected by basic automation systems are collected Implantation H_i(2.2101,2.2303,2.2388,2.2429,2.2482,2.2503,2.2534,2.2555,2.2565,2.2576, 2.2586,2.2596,2.2596,2.2606,2.2606,2.2616,2.2618,2.2620,2.2627,2.2627,2.2617, 2.2617,2.2606,2.2607,2.2596,2.2586,2.2576,2.2565,2.2555,2.2534,2.2503,2.2482, 2.2430,2.2387,2.2303,2.209), outlet thickness of slab Distribution Value h_i(1.652,1.6672,1.6736,1.6768, 1.6808,1.6824,1.6848,1.6864,1.6872,1.6880,1.6888,1.6896,1.6896,1.6904,1.6904, 1.6912,1.6912,1.6912,1.6920,1.6920,1.6912,1.6912,1.6904,1.6904,1.6896,1.6888, 1.6880,1.6872,1.6864,1.6848,1.6824,1.6808,1.6768,1.6736,1.6672,1.6512)；This example In, bar member sum is 36, and the division methods of following tension force and plate shape cross direction profiles calculating bar member used are also identical with this.

S25. position P of the Current data collection point on strip length is calculated_j, j is location parameter, in this example, j= 4981。

P_j=P_j-1+v·T_c=603.562+12.651*0.01=603.689 (m)

Wherein, when carrying out this rolling of even number road, P₀=S₂+3×2πR₂=11.220 (m)；Carry out even number road this During rolling, P₀=S₁+3×2πR₁=11.720 (m)

S26. the horizontal plate shape Distribution Value L in outlet of the strip at j positions is calculated_ji, L_jiIt is that plate shape in units of I is represented Computational methods.

Calculate, the horizontal plate shape Distribution Value L in outlet_ji(22.41,18.64,14.78,8.35,6.89,4.65,0.47 ,- 2.16, -4.15, -5.7, -8.54, -9.48, -11.2, -11.58, -14.15, -14.80, -15.35, -14.88, -15.94, - 14.01, -14, -14.59, -13.55, -10.43, -9.18, -8.29, -5.23, -3.63, -0.46, -0.03,4.88,7.71, 10.58,12.6,17.47,21.92), as shown in figure 14.

S27. by the plate shape Distribution Value L at j positions_ji, correspondence position P_jAnd time P_jWrite plate shape storage file N_coilAnd protect Deposit；Wherein, T_jThe Beijing time built in system, it is accurate to Millisecond.

S28. equation △ t are judged_f=T_fWhether set upIf so, it is transferred to step S29 and step S3；Otherwise, it is transferred to step S29.In this example, now △ t_f=T_fSet up.

S29. equation △ t are judged_c=T_cWhether set up：

S3. according to the belt plate shape Distribution Value and target flatness value obtained in the step S2 to the band steel plate Shape is adjusted, and judges whether the belt plate shape after regulation meets preparatory condition：If it is not, being transferred to step S2.It can specifically wrap Include following steps：

S31. obtain the progress bending roller force and optimize and revise required data；The step can include again：

S31a. T before being extracted from basic automation systems_fEach bending roller force setting value in time, including fore side working roll Bending roller force B_OW=142kN, fore side intermediate calender rolls bending roller force B_OM=187kN, driving side work roll bending power B_DW=142kN, driving Side intermediate calender rolls bending roller force B_DM=187kN.

S31b. from plate shape storage file N_coilT before middle extraction_fAll board form data L in the=8s times_ji, common T_f/T_cIt is individual.

S31c. the default secondary target flatness L of extraction process personnel from process automation system_ti, its expression formula is as follows Shown, curve is as shown in figure 15：

Wherein, x_iFor band steel bar member relative coordinate,

S32. according to the data obtained in the step S31, to the unit for the purpose of obtaining the target flatness value Each bending roller force of the roll reversing roller group of frame six optimizes adjustment, and it comprises the following steps：

S32a. T before calculating_fAverage plate shape Distribution Value in the=8s timesIt is calculated as follows：

It can be calculated, average plate shape Distribution Value(21.74,17.50,14.39,10.38,6.12,4.09,0.49 ,- 1.22, -3.85, -6.55, -8.08, -9.53, -10.34, -12.3, -13.53, -14.22, -15.21, -14.06, - 14.57, -14.3, -13.83, -13.35, -12.98, -12.09, -10.84, -8.35, -5.81, -4.33, -1.45, -0.34, 4.85,6.4,10.66,13.53,19.13,21.61), as shown in figure 16.

S32b. will average plate shape Distribution ValueThe average plate shape curve of secondary first is fitted to, formula is as follows, and curve is as schemed Shown in 16：

S32c. inequality b is judged₃>Whether 0 set upIf it is not, being then transferred to step S32d；If so, being then transferred to step S32j. The step is used to judge whether the first average plate shape curve is identical with the opening direction of target flatness curve.In this example, b₃>0 into It is vertical, therefore it is transferred to step S32j.

S32j. inequality δ≤δ is judged_setWhether set upIf so, being transferred to step S28；Otherwise, it is transferred to step S32k.Its In, δ is positive curve plate shape deviation, and plate shape deviation franchise setting value is δ_set=0.4, it is calculated as follows：

Therefore it is transferred to step S32k.

S32k. inequality ψ is judged>ψ_setWhether set upIf so, being then transferred to step S32l；If it is not, being then transferred to step S32o. Wherein, ψ is the degree of asymmetry of the first average plate shape curve, and degree of asymmetry presets franchise ψ_set=0.15, it is calculated as follows：

Therefore it is transferred to step S32o.

S32o. inequality is judgedWhether set upIf so, being then transferred to step S32p；Otherwise, it is transferred to step S32r.It is calculated as follows：

Therefore,Set up, be then transferred to step S32p.

S32p according to scheme shown in Figure 12 to the work roll bending power of fore side and driving side to positive direction step by step modulating, it is right Then both sides intermediate calender rolls bending roller force extracts step instruction and sends 3 groups of plate shape meters after 0.1s successively to augment direction step by step modulating Calculation value, and calculate average plate shape

S32q. inequality δ '≤δ is judged_setWhether set upIf so, then feeding back current each roller to process automation system Power setting value, and the setting value is kept in this feedback cycle, it is transferred to step S28.Otherwise, it is transferred to step S32p.

For the present embodiment, in the circulation being made up of step S32p and S32q, adjusted by 14 bending roller forces, it is last defeated It is respectively fore side work roll bending power B to go out optimal bending roller force setting value_OW=207kN, fore side intermediate calender rolls bending roller force B_OM= 272kN, driving side work roll bending power B_DW=207kN, driving side intermediate calender rolls bending roller force B_DM=272kN.

Example embodiment two

S11. the fundamental characteristics parameter of six-roller reversing cold-rolling mill train is collected.With reference to shown in Fig. 1, entrance coiling machine center is collected To milling train centre distance S₁=5.5m, entrance coiler sector plate sting reel diameter R during taut band steel₁=330mm, outlet are batched Machine center is to milling train centre distance S₂=5.5m, reel diameter R when outlet coiler sector plate stings taut band steel₂=330mm etc. Deng, also in collection six-roller reversing cold-rolling mill train one-level basic automation systems, the maximum positive bending roller force of working roll The negative bending roller force of working roll maximumThe maximum bending roller force B of middle roll bending cylinder_Mmax=380kN, force snesor and speed Spend the sampling period T of the sensing equipments such as sensor_s=5ms；

S12. the current standby strip fundamental characteristics parameter rolled is collected, including：Coil of strip reel number N where it_coil= 04297367, strip width B_coil=1250mm, supplied materials thickness h₀=2.680mm；

S21. the entitled N of establishment file_coil=04297367 plate shape storage file；

S22. enter plate shape and calculate SBR；

S23. judge whether to start rolling：

S24. mill speed v=15.340m/s, entrance thickness of slab point that the moment is collected by basic automation systems are collected Implantation H_i(2.6469,2.6733,2.6770,2.6844,2.6942,2.6819,2.6905,2.6893,2.6942,2.7015, 2.6942,2.6979,2.7015,2.6991,2.7003,2.7015,2.7003,2.7003,2.7052,2.704,2.6991, 2.7040,2.7003,2.7064,2.7040,2.6954,2.6942,2.6930,2.6942,2.7028,2.6905,2.6893, 2.6831,2.6758,2.6660,2.6439), outlet thickness of slab Distribution Value h_i(1.7272,1.7448,1.7472,1.7520, 1.7584,1.7504,1.7560,1.7552,1.7584,1.7632,1.7584,1.7608,1.7632,1.7616,1.7624, 1.7632,1.7624,1.7624,1.7656,1.7648,1.7616,1.7648,1.7624,1.7664,1.7648,1.7592, 1.7584,1.7576,1.7584,1.7640,1.7560,1.7552,1.7512,1.7464,1.7400,1.7256)；This example In, bar member sum is 36, and the division methods of following tension force and plate shape cross direction profiles calculating bar member used are also identical with this.

S25. position P of the Current data collection point on strip length is calculated_j, j is location parameter, in this example, j= 2155。

P_j=P_j-1+v·T_c=259.334+15.340*0.01=259.487 (m)

Wherein, P₀=S₂+3×2πR₂=11.720 (m)；

Calculate, the horizontal plate shape Distribution Value L in outlet_ji(21.33,15.43,12.78,8.59,7.38,1.74,1.45 ,- 3.08, -3.98, -5.20, -7.84, -9.17, -10.66, -11.99, -12.89, -15.0, -14.81, -14.44, - 13.66, -13.59, -15.02, -12.59, -11.23, -11.23, -10.72, -7.54, -5.73, -3.28, -3.21,1.14, 2.06,6.1,10.19,15.69,16.66,23.79), as shown in figure 17.

S27. by the plate shape Distribution Value L at j positions_ji, correspondence position P_jAnd corresponding time T_jWrite plate shape storage file N_coilAnd preserve；Wherein, T_jThe Beijing time built in system, it is accurate to Millisecond.

S29. equation △ t are judged_c=T_cWhether set up：

S31a. T before being extracted from basic automation systems_fEach bending roller force setting value in time, including fore side working roll Bending roller force B_OW=126kN, fore side intermediate calender rolls bending roller force B_OM=174kN, driving side work roll bending power B_DW=126kN, driving Side intermediate calender rolls bending roller force B_DM=174kN.

Wherein, x_iFor band steel bar member relative coordinate,

It can be calculated, average plate shape Distribution Value(21.33,15.43,12.78,8.59,7.38,3.24,1.87 ,- 3.08, -3.98, -5.20, -7.84, -9.17, -10.66, -11.99, -12.89, -14.22, -14.01, -13.78, - 12.66, -12.59, -11.52, -10.09, -9.23, -7.73, -6.22, -4.04, -2.23,0.22,1.44,4.21,5.96, 9.6,13.69,19.19,22.71,28.64), as shown in figure 18.

S32b. will average plate shape Distribution ValueThe average plate shape curve of secondary first is fitted to, formula is as follows, and curve is as schemed Shown in 18：

Therefore it is transferred to step S32k.

Therefore it is transferred to step S32l.

S32l. inequality is judgedWhether set upIf so, being then transferred to step S32m；If it is not, being then transferred to Step S32n.For the present invention, for convenience of description, it is assumed that band steel bar member i=1 sides are fore side, i=n sides are driving side.The step The rapid asymmetric direction for being used to judge the first average plate shape curve.Specifically it is calculated as follows：

Therefore it is transferred to step S32n.

S32n. according to scheme shown in Figure 11 to driving side work roll bending power to positive direction step by step modulating, in driving side Between roll bending power extract step instruction successively to augment direction step by step modulating, then and send 3 groups of plate shape calculated values after 0.1s, press Scheme shown in Figure 11 judges whether its average plate shape curve asymmetric degree is overproof, if not overproof, is transferred to step S32o；Otherwise, Repeat this successive step.In real process, entered 5 step by step modulating, driving side work roll bending power is changed into B_DW=141kN, driving Side intermediate calender rolls bending roller force B_DM=204kN, the first average plate shape curve asymmetric degree now is not overproof, then is transferred to step S32o；

Therefore,Set up, be then transferred to step S32p.

S32p. according to scheme shown in Figure 12 to the work roll bending power of fore side and driving side to positive direction step by step modulating, To both sides intermediate calender rolls bending roller force to augment direction step by step modulating, step instruction is then extracted successively and sends 3 groups of plate shapes after 0.1s Calculated value, and calculate average plate shape

For the present embodiment, in the circulation being made up of step S32p and S32q, adjusted by 9 bending roller forces, it is last defeated It is respectively fore side work roll bending power B to go out optimal bending roller force setting value_OW=180kN, fore side intermediate calender rolls bending roller force B_OM= 228kN, driving side work roll bending power B_DW=205kN, driving side intermediate calender rolls bending roller force B_DM=258kN.

For part six-roller reversing cold-rolling mill train be investment reduction cost without configure plate-shaped sensing roller in the case of, this hair Bright provided method can preferably solve the problems, such as its plate shape closed loop feedback control.The present invention fills under the premise of equipment is not increased Divide using milling train gateway calibrator data, realize the calculating of plate shape, recognize, automatically control the work(such as response, closed loop feedback control Can, and computational methods are succinct, fast response time, while being easily programmed realization, cost input is minimum, and effect is obvious, with larger Practical value.In addition, the present invention extends to calibrator and rolling without plate-shaped sensing roller before and after the configuration such as reversable mill, planisher Steel unit, this type unit quantity is more both at home and abroad at present, therefore the present invention has preferable popularization and application scene.

The disclosure is been described by by above-mentioned related embodiment, but above-described embodiment is only the example for implementing the disclosure. It must be noted that, the embodiment disclosed is not limiting as the scope of the present disclosure.

Claims

1. a kind of roll reversing roller group plate shape closed-loop feedback control method of single chassis six, it is characterised in that including step：

S1. obtain the fundamental characteristics parameter of the roll reversing roller group of single chassis six and sampled according to predetermined period current for the strip rolled Fundamental characteristics parameter；

S2. parameter related to belt plate shape calculating in the collection operation of rolling, and substantially special with reference to what is obtained in the step S1 Property parameter calculate and belt plate shape Distribution Value and store；

S3. the belt plate shape is adjusted according to the belt plate shape Distribution Value and target flatness value that are obtained in the step S2 Section, and judge whether the belt plate shape after regulation meets preparatory condition：If it is not, being transferred to step S2；

The step S1 includes：

S11. the entrance coiling machine center for collecting the six-roller reversing cold-rolling mill train is fan-shaped to milling train centre distance, entrance coiling machine Reel diameter, outlet coiling machine center to milling train centre distance, outlet coiler sector plate when plate stings taut band steel sting taut band steel When reel diameter, the maximum positive bending roller force of working rollThe negative bending roller force of working roll maximumAnd the maximum bending roller force of intermediate calender rolls B_Mmax；

S12. the fundamental characteristics parameter of the current standby strip rolled is collected；

S13. preset and calculate sampling period T_cAnd plate shape feedback control cycle T_f；

The step S2 includes：

S21. the plate shape storage file with the fundamental characteristics parameter association of the standby strip rolled is created；

S22. enter plate shape and calculate SBR；

S23. judge whether to start rolling：

If so, being transferred to step S24；If it is not, being transferred to step S22；

S24. sample current mill speed, entrance thickness of slab Distribution Value and outlet thickness of slab Distribution Value；

S25. current data sample point is calculated on strip length with reference to the parameter gathered in the step S11 and step S24 Position P_j, wherein j be a location parameter, j=0,1,2 ..., m-1, m, m is total number of sample points；

S26. the result with reference to the step S25 calculates outlet plate shape Distribution Value of the strip at j positions；

S27. the plate shape Distribution Value at j positions and correspondence time are write into the plate shape storage file；

S28. equation △ t are judged_f=T_fWhether set up：

If so, being transferred to step S29 and step S3；If it is not, being transferred to step S29；

Wherein, △ t_fFor plate shape feedback interval；

S29. equation △ t are judged_c=T_cWhether set up：

If so, making △ t_c=0, j=j+1, and it is transferred to step S24；If it is not, repeat step S29；

Wherein, △ t_cSampling time interval is calculated for plate shape.

2. the roll reversing roller group plate shape closed-loop feedback control method of single chassis six as claimed in claim 1, it is characterised in that institute State in step S3 by each bending roller force to the roll reversing roller group of single chassis six optimize adjustment and to the band steel plate Shape is adjusted.

3. the roll reversing roller group plate shape closed-loop feedback control method of single chassis six as claimed in claim 1 or 2, its feature exists In the step S3 includes：

S31. obtain the progress bending roller force and optimize and revise required data；

S32. according to the data obtained in the step S31, to the single chassis six for the purpose of obtaining the target flatness value Each bending roller force of roll reversing roller group optimizes adjustment.

4. the roll reversing roller group plate shape closed-loop feedback control method of single chassis six as claimed in claim 3, it is characterised in that institute Stating step S31 includes：

S31a. T before obtaining_fFore side work roll bending power B in time_OW, fore side intermediate calender rolls bending roller force B_OM, driving side working roll Bending roller force B_DWAnd driving side intermediate calender rolls bending roller force B_DM；

S31b. T before being extracted from the plate shape storage file_fAll plate shape Distribution Values in time；

S31c. the default target flatness value L is obtained_ti。

5. the roll reversing roller group plate shape closed-loop feedback control method of single chassis six as claimed in claim 4, it is characterised in that institute Stating step S32 includes：

S32a. T before calculating_fAverage plate shape Distribution Value in time；

S32b. the average plate value shape Distribution Value is fitted to the average plate shape curve of secondary first；

S32c. judge whether the described first average plate shape curve is identical with the opening direction of a target flatness curve：

If it is not, being transferred to step S32d；If so, being transferred to step S32j；

S32d. judge whether the degree of asymmetry of the described first average plate shape curve is overproof：

If so, being transferred to step S32e；If it is not, being transferred to step S32h；

S32e. the asymmetric direction of the described first average plate shape curve is judged：

If fore side, step S32f is transferred to；If driving side, step S32g is transferred to；

S32f. to fore side work roll bending power to negative direction step by step modulating, to fore side intermediate calender rolls bending roller force to reducing direction Step by step modulating；Step instruction is extracted successively to send multigroup plate shape calculated value after the scheduled time and judge its average plate shape curve Whether degree of asymmetry is overproof：

If so, repeat step S32f；If it is not, being transferred to step S32h；

S32g. to driving side work roll bending power to negative direction step by step modulating, to driving side intermediate calender rolls bending roller force to reducing direction Step by step modulating；Step instruction is extracted successively to send multigroup plate shape calculated value after the scheduled time and judge its average plate shape curve Whether degree of asymmetry is overproof：

If so, repeat step S32g；If it is not, being transferred to step S32h；

S32h. to the work roll bending power of fore side and driving side to negative direction step by step modulating, to both sides intermediate calender rolls bending roller force to Reduce direction step by step modulating；Step instruction is extracted successively to send multigroup plate shape calculated value after the scheduled time and calculate average plate shape And it is fitted to the second average plate shape curve；

S32i. judge whether the described second average plate shape curve deviation is less than plate shape deviation franchise：

If so, being transferred to step S28；If it is not, being transferred to step S32h；

S32j. judge whether the described first average plate shape curve deviation is less than plate shape deviation franchise：

If so, being transferred to step S28；If it is not, being transferred to step S32k；

S32k. judge whether the degree of asymmetry of the described first average plate shape curve is overproof：

If so, being transferred to step S32l；If it is not, being transferred to step S32o；

S32l. the asymmetric direction of the described first average plate shape curve is judged：

If fore side, step S32m is transferred to；If driving side, step S32n is transferred to；

S32m. to fore side work roll bending power to positive direction step by step modulating, to fore side intermediate calender rolls bending roller force to augment direction Step by step modulating, extracts step instruction and sends multigroup plate shape calculated value after the scheduled time and judge its average plate shape curve successively Whether degree of asymmetry is overproof：

If so, repeat step S32m；If it is not, being transferred to step S32o；

S32n. to driving side work roll bending power to positive direction step by step modulating, to driving side intermediate calender rolls bending roller force to augment direction Step by step modulating；Step instruction is extracted successively to send multigroup plate shape calculated value after the scheduled time and judge its average plate shape curve Whether degree of asymmetry is overproof：

If so, repeat step S32n；If it is not, being transferred to step S32o；

S32o. judge whether the amplitude of average plate shape curve exceedes default amplitude：

If so, being transferred to step S32p；If it is not, being transferred to step S32r；

S32p. to the work roll bending power of fore side and driving side to positive direction step by step modulating, to both sides intermediate calender rolls bending roller force to Augment direction step by step modulating, extracts step instruction and sends multigroup plate shape calculated value after the scheduled time and calculate average plate shape successively And it is fitted to the second average plate shape curve；

S32q. judge whether the described second average plate shape curve deviation is less than plate shape deviation franchise：

If so, being transferred to step S28；If it is not, being transferred to step S32p；

S32r. to the work roll bending power of fore side and driving side to negative direction step by step modulating, to both sides intermediate calender rolls bending roller force to Reduce direction step by step modulating；Step instruction is extracted successively to send multigroup plate shape calculated value after the scheduled time and calculate average plate shape And it is fitted to the second average plate shape curve；

S32s. judge whether the described second average plate shape curve deviation is less than plate shape deviation franchise：

If so, being transferred to step S28；If it is not, being transferred to step S32r.

6. the roll reversing roller group plate shape closed-loop feedback control method of single chassis six as claimed in claim 5, it is characterised in that institute Stating step S32f includes：

S32f1. working roll and the basic adjustment unit of intermediate calender rolls bending roller force are set；

S32f2. evaluation work roller and the actual adjustment unit of intermediate calender rolls bending roller force；

S32f3. the result in the step S32f1 and S32f2 calculates current operation side working roll and intermediate calender rolls bending roller force Setting value B '_OWWith B '_OM；

S32f4. inequality is judgedWhether set up：

S32f5. 0≤B ' of inequality is judged_OM≤B_MmaxWhether set up：

S32f6. equation set is judgedWhether set up：

If so, being transferred to step S28；If it is not, being transferred to step S32f7；

S32f7. by current bending roller force setting value B '_OWWith B '_OMProcess automation system bending roller force setting module is fed back to, and by liquid System acting is pressed to perform；

S32f8. extract step instruction successively from the plate shape storage file and send multigroup plate shape calculated value after the scheduled time And calculate average plate shape and be fitted to the second average plate shape curve；

S32f9. judge whether the degree of asymmetry of the described second average plate shape curve is overproof：

7. the roll reversing roller group plate shape closed-loop feedback control method of single chassis six as claimed in claim 5, it is characterised in that institute Stating step S32g includes：

S32g1. working roll and the basic adjustment unit of intermediate calender rolls bending roller force are set；

S32g2. evaluation work roller and the actual adjustment unit of intermediate calender rolls bending roller force；

S32g3. the result in the step S32g1 and S32g2 calculates current operation side working roll and intermediate calender rolls bending roller force Setting value B '_DWWith B '_DM；

S32g4. inequality is judgedWhether set up：

If so, being transferred to step S32g5；If it is not, orderIt is transferred to step S32g5；

S32g5. 0≤B ' of inequality is judged_DM≤B_MmaxWhether set up：

If so, being transferred to step S32g6；If it is not, making B '_DM=0, it is transferred to step S32g6；

S32g6. equation set is judgedWhether set up：

If so, being transferred to step S28；If it is not, being transferred to step S32g7；

S32g7. by current bending roller force setting value B '_DWWith B '_DMProcess automation system bending roller force setting module is fed back to, and by liquid System acting is pressed to perform；

S32g8. extract step instruction successively from the plate shape storage file and send multigroup plate shape calculated value after the scheduled time And calculate average plate shape and be fitted to the second average plate shape curve；

S32g9. judge whether the degree of asymmetry of average plate shape curve is overproof：

If so, being transferred to step S32g3；If it is not, being transferred to step S32h.

8. the roll reversing roller group plate shape closed-loop feedback control method of single chassis six as claimed in claim 5, it is characterised in that institute Stating step S32h includes：

S32h1. working roll and the basic adjustment unit of intermediate calender rolls bending roller force are set；

S32h2. evaluation work roller and the actual adjustment unit of intermediate calender rolls bending roller force；

S32h3. the result in the step S32h1 and S32h2 calculates current operation side working roll and intermediate calender rolls bending roller force Setting value B '_OWWith B '_OM；

S32h4. inequality is judgedWhether set up：

If so, being transferred to step S32h5；If it is not, orderIt is transferred to step S32h5；

S32h5. 0≤B ' of inequality is judged_OM≤B_MmaxWhether set up：

If so, being transferred to step S32h6；If it is not, making B '_OM=0, it is transferred to step S32h6；

S32h6. inequality is judgedWhether set up：

If so, being transferred to step S32h7；If it is not, orderIt is transferred to step S32h7；

S32h7. 0≤B ' of inequality is judged_DM≤B_MmaxWhether set up：

S32h8. equation set is judgedWhether set up：

If so, being transferred to step S28；If it is not, being transferred to step S32h9；

S32h9. by current bending roller force setting value B '_OWWith B '_OMProcess automation system bending roller force setting module is fed back to, and by liquid System acting is pressed to perform；

S32h10. extract step instruction successively from the plate shape storage file and send multigroup plate shape calculated value after the scheduled time And calculate average plate shape and be fitted to the second average plate shape curve；It is transferred to step S32i.

9. the roll reversing roller group plate shape closed-loop feedback control method of single chassis six as claimed in claim 5, it is characterised in that institute Stating step S32m includes：

S32m1. working roll and the basic adjustment unit of intermediate calender rolls bending roller force are set；

S32m2. evaluation work roller and the actual adjustment unit of intermediate calender rolls bending roller force；

S32m3. the result in the step S32m1 and S32m2 calculates current operation side working roll and intermediate calender rolls bending roller force Setting value B '_OWWith B '_OM；

S32m4. inequality is judgedWhether set up：

S32m5. 0≤B ' of inequality is judged_OM≤B_MmaxWhether set up：

S32m6. equation set is judgedWhether set up：

S32m7. by current bending roller force setting value B '_OWWith B '_OMProcess automation system bending roller force setting module is fed back to, and by liquid System acting is pressed to perform；

S32m8. extract step instruction successively from the plate shape storage file and send multigroup plate shape calculated value after the scheduled time And calculate average plate shape and be fitted to the second average plate shape curve；

10. the roll reversing roller group plate shape closed-loop feedback control method of single chassis six as claimed in claim 5, it is characterised in that The step S32n includes：

S32n1. working roll and the basic adjustment unit of intermediate calender rolls bending roller force are set；

S32n2. evaluation work roller and the actual adjustment unit of intermediate calender rolls bending roller force；

S32n3. the result in the step S32n1 and S32n2 calculates current operation side working roll and intermediate calender rolls bending roller force Setting value B '_DWWith B '_DM；

S32n4. inequality is judgedWhether set up：

If so, being transferred to step S32n5；If it is not, orderIt is transferred to step S32n5；

S32n5. 0≤B ' of inequality is judged_DM≤B_MmaxWhether set up：

If so, being transferred to step S32n6；If it is not, making B '_DM=B_Mmax, it is transferred to step S32n6；

S32n6. equation set is judgedWhether set up：

If so, being transferred to step S28；If it is not, being transferred to step S32n7；

S32n7. by current bending roller force setting value B '_DWWith B '_DMProcess automation system bending roller force setting module is fed back to, and by liquid System acting is pressed to perform；

S32n8. extract step instruction successively from the plate shape storage file and send multigroup plate shape calculated value after the scheduled time And calculate average plate shape and be fitted to the second average plate shape curve；

S32n9. judge whether the degree of asymmetry of average plate shape curve is overproof：

If so, being transferred to step S32n3；If it is not, being transferred to step S32o.

11. the roll reversing roller group plate shape closed-loop feedback control method of single chassis six as claimed in claim 5, it is characterised in that The step S32p includes：

S32p1. working roll and the basic adjustment unit of intermediate calender rolls bending roller force are set；

S32p2. evaluation work roller and the actual adjustment unit of intermediate calender rolls bending roller force；

S32p3. the result in the step S32p1 and S32p2 calculates current operation side working roll and intermediate calender rolls bending roller force Setting value B '_OWWith B '_OM；

S32p4. inequality is judgedWhether set up：

If so, being transferred to step S32p5；If it is not, orderIt is transferred to step S32p5；

S32p5. 0≤B ' of inequality is judged_OM≤B_MmaxWhether set up：

If so, being transferred to step S32p6；If it is not, making B '_OM=B_Mmax, it is transferred to step S32p6；

S32p6. inequality is judgedWhether set up：

If so, being transferred to step S32p7；If it is not, orderIt is transferred to step S32p7；

S32p7. 0≤B ' of inequality is judged_DM≤B_MmaxWhether set up：

If so, being transferred to step S32g8；If it is not, making B '_DM=B_Mmax, it is transferred to step S32g8；

S32p8. equation set is judgedWhether set up：

If so, being transferred to step S28；If it is not, being transferred to step S32p9；

S32p9. by current bending roller force setting value B '_OWWith B '_OMProcess automation system bending roller force setting module is fed back to, and by liquid System acting is pressed to perform；

S32p10. extract step instruction successively from the plate shape storage file and send multigroup plate shape calculated value after the scheduled time And calculate average plate shape and be fitted to the second average plate shape curve；It is transferred to step S32q.

12. the roll reversing roller group plate shape closed-loop feedback control method of single chassis six as claimed in claim 5, it is characterised in that The step S32r includes：

S32r3. the result in the step S32r1 and S32r2 calculates current operation side working roll and intermediate calender rolls bending roller force Setting value B '_OWWith B '_OM；

S32r4. inequality is judgedWhether set up：

S32r5. 0≤B ' of inequality is judged_OM≤B_MmaxWhether set up：

S32r6. inequality is judgedWhether set up：

S32r7. 0≤B ' of inequality is judged_DM≤B_MmaxWhether set up：

S32r8. equation set is judgedWhether set up：

S32r9. by current bending roller force setting value B '_OWWith B '_OMProcess automation system bending roller force setting module is fed back to, and by liquid System acting is pressed to perform；

S32r10. extract step instruction successively from the plate shape storage file and send multigroup plate shape calculated value after the scheduled time And calculate average plate shape and be fitted to the second average plate shape curve；It is transferred to step S32s.