CN104785540B - A kind of rolling efficiency method for improving for being suitable for five Stands Cold Tandem Mill groups - Google Patents
A kind of rolling efficiency method for improving for being suitable for five Stands Cold Tandem Mill groups Download PDFInfo
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- CN104785540B CN104785540B CN201410027160.5A CN201410027160A CN104785540B CN 104785540 B CN104785540 B CN 104785540B CN 201410027160 A CN201410027160 A CN 201410027160A CN 104785540 B CN104785540 B CN 104785540B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/48—Tension control; Compression control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
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Abstract
A kind of rolling efficiency method for improving for being suitable for five Stands Cold Tandem Mill groups,It is related to be specially adapted for rolling mill for metal or the control device or method of its converted products,More particularly to a kind of rolling efficiency method for improving for being used for the control of the five Stands Cold Tandem Mill group operations of rolling,Use the existing device parameter of cold continuous rolling set control system and technological parameter data,According to the steel grade and specification characteristic parameter of intending expanding product,Calculate draught pressure and rolling power,Comprehensive descision is carried out using unit security admission coefficient,While the safe clearance of Rolling Production is ensured,Distributed by the optimization to drafts and each rack outlet tension force,Unit is improve to greatest extent under specific technological lubrication system,The limit mill speed to be reached,Search obtains maximum mill speed as control parameter,Improve the mill speed of Limit specifications product,In the case where equipment investment is not increased,Expand tandem mills Limit specifications product and improve its production capacity and production efficiency.
Description
Technical field
Control device or method the present invention relates to be specially adapted for rolling mill for metal or its converted products, more particularly to it is a kind of
For the rolling efficiency method for improving of five Stands Cold Tandem Mill group operations of rolling control.
Background technology
For cold continuous rolling production line, when the market orientation of unit changes with product mix, it is necessary to unit
Production capacity is adjusted.And the accounting for laying particular emphasis on pressure ability is compared in scene for the accounting of production capacity, it is determined whether can
To roll, the thickness limit that can be rolled.And seldom in view of the problem of mill speed.Chinese invention patent application is " a kind of cold
The setting device and method of each frame drafts of tandem rolling and mill speed " (application number：201310193184.3 application publication numbers：
CN103272853A the setting device of a kind of each frame drafts of cold continuous rolling and mill speed) is disclosed, including：Initial depression rate
Generator, power equilibrium calculation device, about energy consumption calculation device, beam generator, coarse adjustment renovator, constraint non-dominated ranking device, accurate adjustment
Renovator, reduction ratio selector, reduction ratio renovator screening washer and final drafts and mill speed generator.The dress of the invention
Put and method can calculate the drafts of rolling each frame of different size strip in the case where empirical data is lacked and roll speed
Degree, on the premise of each frame balancing the load is ensured, reduces required power to greatest extent.For scene, efficiency is exactly
Life, if the accounting by depressing ability, unit can roll a certain thickness limit, the mill speed of requirement not reached but,
Can not still illustrate that unit possesses the ability for producing the thickness product, so during product specification is expanded, pursue mesh
On the premise of mark thickness, how to lift the production efficiency of unit just turns into the focus of site technology tackling key problem.
The content of the invention
It is an object of the invention to provide a kind of rolling efficiency method for improving for being suitable for five Stands Cold Tandem Mill groups, Ke Yichong
Divide the equipment and technology feature for combining five Stands Cold Tandem Mill groups, by the complex optimum to rolling procedure, difference can be provided
The steel grade of strength grade under a certain specific technological lubrication system, for the maximum mill speed of specific milling train, so that maximum
The raising of degree intends expanding the mill speed of specification strip steel, it is ensured that rolling efficiency, is that enterprise creates economic benefit.
The present invention solves the technical scheme that is used of above-mentioned technical problem：
A kind of rolling efficiency method for improving for being suitable for five Stands Cold Tandem Mill groups, for rolling for five Stands Cold Tandem Mill groups
Control system processed, it is characterised in that described rolling efficiency method for improving is comprised the following steps：
S01：The device parameter and technological parameter of five Stands Cold Tandem Mill groups are collected, including：The working roll roll neck of frame 1-5
Diw, frame 1-5 milling trains maximum draught pressure setting value P allowablei max, frame 1-5 milling trains maximum rolling power setting value allowable
Fi max, uncoiler uncoiling tension T0, frame 1-4 milling trains outlet tension force maximum of T allowablei max, frame 1-4 milling trains export allowable
Power minimum value Ti min, crimping machine curl tension T5, unit security admission coefficient η；Frame i during unit rolling specific standard band
Deform the minimum value λ of the proportion in the total deformation of institute's organic framei min, the change of frame i during unit rolling specific standard band
The maximum λ of shape proportion in the total deformation of institute's organic framei max, minimum mill speed V is permitted in the unit operation of rolling0,
Wherein, i is corresponding shelf number, unit security admission coefficient η=0.85-0.95；
S02：The given steel grade and specification characteristic parameter for intending expanding product, including band initial strength σs0, processing hardening
Coefficient ks, the width B of band, the original depth h of supplied materials0, intend expanding the target thickness h of specification product5；
S03：Collect main technique lubricating regime parameter, including 1-5# frame emulsions flow flowi, emulsion just
Beginning temperature Twd, the concentration C of emulsion；
S04：Procedure parameter involved during rolling efficiency lifting is calculated is defined, including：The reduction distribution value of frame i
λi, deformation step-size in search Δ λ, frame 1-4 outlet tension force Ti, tension force step-size in search Δ T, the reduction ratio of tandem mills frame i
εi, maximum mill speed search value Vmax0, maximal rate search parameter s；The reduction ratio ε of frame 1-5i, the outlet thickness of frame 1-4
Degree hi, the outlet mill speed v of frame 1-4i, and frame 1-5 draught pressure PiWith rolling power Fi；
S05：The original allocation value λ of the given drafts of frame 11=λ1min, outlet tension force initial value T1=T1min, frame 2 presses
The original allocation value λ of lower amount2=λ2min, outlet tension force initial value T2=T2min, the original allocation value λ of the drafts of frame 33=
λ3min, outlet tension force initial value T3=T3min, the original allocation value λ of the drafts of frame 44=λ4min, outlet tension force initial value T4=
T4min；
S06：Calculate the original allocation value λ of the drafts of frame 55=1- λ1-λ2-λ3-λ4；
S07：Make maximal rate search parameter s=0；
S08：Calculate maximum mill speed search value Vmax0=V0+0.5s；
S10：Device parameter according to unit calculates draught pressure P with technological parameteriWith rolling power Fi；
S14：Comprehensive descision is carried out using unit security admission coefficient η, it is ensured that the safe clearance of Rolling Production, judge
FormulaWhether set upIf inequality is set up, step S21 is transferred to；If inequality is invalid, step is transferred to
S22；
S21：S=s+1 is made, step S08 is transferred to；
S22：Judge inequality Vmax0- 0.5 ＞ V0Whether set upIf inequality is set up, V is made0=Vmax0- 0.5, turn
Enter step S05；Until inequality is invalid, step S23 is transferred to；
S23：Judge inequalityWhether set upIf inequality is set up, λiIncrease a deformation search step
Δ λ, T longiIncrease a tension force step-size in search Δ T, redistribute the reduction distribution value and outlet tension value of each frame, be transferred to
Step S06；Until inequality is invalid, step S24 is transferred to；
S24：The maximum mill speed V for obtaining will be searched formax0=Vmax0- 0.5 used as control parameter, sends five frames to cold
The roll control system of Continuous mill train.
A kind of preferred technical scheme of the rolling efficiency method for improving for being suitable for five Stands Cold Tandem Mill groups of the invention,
It is characterized in that described step S10 is comprised the following steps：
S11：According to original depth h0, target thickness h5With the reduction distribution value λ of frame 1-5i, calculate each frame
The computation model of reduction ratio and exit thickness, wherein reduction ratio is：
Each rack outlet THICKNESS CALCULATION model is：hi=hi-1(1-εi)；
During the above is various, i is corresponding shelf number；
S12：According to the equal principle of second flow, the outlet mill speed of computer rack 1-4Wherein, v5It is machine
The outlet mill speed of frame 5, that is, the maximum mill speed search value in step S08；
S13：With entrance tension force Ti-1, outlet tension force Ti, reduction ratio εi, initial strength σs0, strain hardening coefficient ks, rolling speed
Degree vi, the width B of band, inlet thickness be hi-1With exit thickness hiIt is primary condition, calculates each frame and moisten in current process
Sliding system, the draught pressure P under rolling procedure stateiWith rolling power Fi。
The beneficial effects of the invention are as follows：
1. the rolling efficiency method for improving for being suitable for five Stands Cold Tandem Mill groups of the invention, by drafts and each machine
The optimization distribution of frame outlet tension force, improves unit under specific technological lubrication system, the pole to be reached to greatest extent
Limit mill speed, can greatly improve the mill speed of Limit specifications product, be the expansion of tandem mills Limit specifications product
Lay the foundation.
2. the rolling efficiency method for improving for being suitable for five Stands Cold Tandem Mill groups of the invention, is controlled using tandem mills
The existing device parameter of system and technological parameter data, the maximum stable mill speed of unit is controlled by computer program, real
The rolling efficiency of tandem mills is now lifted, strip Limit specifications product can be improved in the case where equipment investment is not increased
Production capacity, improve production efficiency, so as to bringing larger economic benefit to enterprise.
Brief description of the drawings
Fig. 1 is the control flow chart of the rolling efficiency method for improving that the present invention is suitable for five Stands Cold Tandem Mill groups；
Fig. 2 is calculating and the control flow chart of verification procedure of draught pressure and rolling power.
Specific embodiment
For better understanding of above-mentioned technical proposal of the invention, carry out with reference to the accompanying drawings and examples further
Describe in detail.
Fig. 1 is one embodiment of the rolling efficiency method for improving for being suitable for five Stands Cold Tandem Mill groups of the invention, is
The application process of explanation correlation technique of the present invention, now by taking certain 1,420 5 Stands Cold Tandem Mill group as an example, introduces in detail
The calculating process of certain 1,420 5 Stands Cold Tandem Mill group rolling efficiency lifting：
Embodiment 1
The present embodiment with supplied materials steel grade as MRT-5CA, supplied materials specification as 2.01mm × strip of 935mm as a example by, illustrate this
Invent the application process of the correlation technique.
In step S01, the equipment and technology parameter of five Stands Cold Tandem Mill groups is collected, including：
The working roll roll neck D of frame 1-5iw={ 482.89,486.32,459.24,386.21,394.5 } mm,
Frame 1-5 milling trains maximum draught pressure setting value P allowablei max={ 1800,1800,1800,1800,1800 } t,
Frame 1-5 milling trains maximum rolling power setting value F allowablei max={ 2680,4000,4000,4000,4000 } kw,
Uncoiler uncoiling tension T0=70MPa,
Frame 1-4 milling trains export tension force maximum of T allowablei max=250MPa,
Frame 1-4 milling trains export tension force minimum value T allowablei min=80MPa,
Crimping machine curl tension T5=60MPa,
Unit security admission coefficient η=0.9,
The minimum value of deformation proportion in the total deformation of institute's organic frame of frame i during unit rolling specific standard band
λi min={ 0.2,0.2,0.1,0.1,0.05 },
The maximum of deformation proportion in the total deformation of institute's organic frame of frame i during unit rolling specific standard band
λi max={ 0.6,0.45,0.4,0.3,0.2 },
Permit minimum mill speed V in the unit operation of rolling0=450m/min；
During the above is various, i is corresponding shelf number.
In step S02, the steel grade and specification characteristic parameter for intending expanding product are given, including：
The initial strength σ of bands0=420MPa,
Strain hardening coefficient ks=1.2,
The width B=935mm of band,
The original depth h of supplied materials0=2.0mm,
Intend expanding the target thickness h of specification product5=0.17mm；
In step S03, main technique lubricating regime parameter is collected, including：
The flow flow of frame 1-5 emulsionsi={ 1010,1250,1100,950,1200 } L/min,
The initial temperature T of emulsionwd=58 DEG C,
Concentration C=4.2% of emulsion；
In step S04, procedure parameter involved during rolling efficiency lifting is calculated is defined, including：
The reduction distribution value λ of frame ii, i.e. the deformation of frame i proportion in the total deformation of institute's organic frame,
Deformation step-size in search Δ λ=0.01,
Frame 1-4 outlet tension force Ti,
Tension force step-size in search Δ T=5MPa,
The reduction ratio ε of tandem mills frame ii,
Maximum mill speed search value Vmax0,
Maximal rate search parameter s,
The reduction ratio ε of frame 1-5i,
The exit thickness h of frame 1-4i,
The outlet mill speed v of frame 1-4i,
The draught pressure P of frame 1-5iWith rolling power Fi；
In view of in live actual production, when each frame is rolled, the ratio of its deformation distribution should exceed band
The least amount of deformation distribution ratio λ that the frame relevant device is allowedi min, it is related that the outlet tension force of frame 1-4 should be greater than each frame
The minimum tension License Value T that equipment is allowedi min, so the step of the present embodiment in S05, each process variable assigns initial value such as
Under：
The original allocation value λ of the drafts of frame 11=λ1min=0.2, outlet tension force initial value T1=T1min=80MPa,
The original allocation value λ of the drafts of frame 22=λ2min=0.2, outlet tension force initial value T2=T2min=80MPa,
The original allocation value λ of the drafts of frame 33=λ3min=0.1, outlet tension force initial value T3=T3min=80MPa,
The original allocation value λ of the drafts of frame 44=λ4min=0.1, outlet tension force initial value T4=T4min=80MPa；
In step S06, the original allocation value λ of the drafts of frame 5 is calculated5=1- λ1-λ2-λ3-λ4=0.4；
In step S07, maximal rate search parameter s=0 is made；
In step S08, maximum mill speed search value V is calculatedmax0=V0+ 0.5s=450m/min；
Step S10 calculates draught pressure and rolling power, its basic procedure according to the device parameter of unit with technological parameter
As shown in Fig. 2 comprising the following steps S11 to S13：
In step s 11, according to original depth h0, target thickness h5With the reduction distribution value λ of frame 1-5i, calculate：
The reduction ratio ε of each framei=(0.183,0.225,0.146,0.170,0.82),
The exit thickness h of frame 1-4i=(1.632,1.264,1.08,0.8896) mm；
During the above is various, i is corresponding shelf number.
In step s 12, according to the principle that second flow is equal, calculate：
The outlet mill speed v of frame 1-4i=(44.12,56.96,66.67,80.36) m/min；
In step s 13, with entrance tension force Ti-1, outlet tension force Ti, reduction ratio εi, initial strength σs0, strain hardening coefficient
It is ks, mill speed be vi, the width B of band, inlet thickness be hi-1, exit thickness be hiIt is primary condition, calculates each machine
Draught pressure P of the frame in the case of current process lubricating regime, rolling procedureiWith rolling power Fi：
Pi=(683.24,694.96,595.75,599.16,9832.49) t,
Fi=(173.02,249.19,167.15,200.85,6983.98) Kw.
Certain fluctuation is there is in view of live tension force, draught pressure should ensure that certain safety is remaining with rolling power
Amount, therefore, in step S14, carry out comprehensive descision using unit security admission coefficient η, it is ensured that the safe clearance of Rolling Production,
Judge inequalityWhether set up,
In this embodiment, it is clear that inequality is invalid, it is transferred to step S22；
In the step s 21, s=s+1 is made, step S08 is transferred to；
In step S22, inequality V is judgedmax0- 0.5 ＞ V0Whether set up, if inequality is set up, make V0=Vmax0-
0.5, it is transferred to step S05；Until inequality is invalid, step S23 is transferred to；
In view of the fluctuation situation of tension force, in step S23, inequality is judgedWhether set up, in formula, λi
And TiTo correspond to the array of each shelf number i respectively.
The obvious inequality of original state is set up, then λiIncrease step-size in search Δ λ, a TiIncrease a tension force step-size in search
Δ T, redistributes deflection and outlet tension value, is transferred to step S06；Until inequality is invalid, step S24 is transferred to；
Finally, in step s 24, the maximum mill speed V for obtaining will be searched formax0=Vmax0- 0.5=935.5m/min makees
It is control parameter, sends the roll control system of five Stands Cold Tandem Mill groups to, realizes the lifting of unit rolling efficiency.
Unit can reach to the maximum stable mill speed of the specification product after the embodiment can be seen that optimization
935.5m/min, and unit is using before correlation technique of the present invention, actual largest production speed is only 800m/min left
The right side, maximum mill speed improves 16.94%, illustrates that correlation computations of the present invention can be good at improving the production effect of unit
Rate, economic benefit is brought to scene.
Embodiment 2
The present embodiment with supplied materials steel grade as MRT-4CA, supplied materials specification as 2.01mm × strip of 812mm as a example by, illustrate this
Invent the application process of the correlation technique.
In step S01, the equipment and technology parameter of five Stands Cold Tandem Mill groups is collected, including：
The working roll roll neck D of frame 1-5iw={ 468.06,479.48,490.72,398.32,402.35 } mm,
Frame 1-5 milling trains maximum draught pressure setting value P allowablei max={ 1800,1800,1800,1800,1800 } t,
Frame 1-5 milling trains maximum rolling power setting value F allowablei max={ 2680,4000,4000,4000,4000 } kw
Uncoiler uncoiling tension T0=70MPa,
Frame 1-4 milling trains export tension force maximum of T allowablei max=250MPa,
Frame 1-4 milling trains export tension force minimum value T allowablei min=80MPa,
Crimping machine curl tension T5=60MPa,
Unit security admission coefficient η=0.9,
The minimum value of deformation proportion in the total deformation of institute's organic frame of frame i during unit rolling specific standard band
λi min={ 0.25,0.2,0.15,0.1,0.1 },
The maximum of deformation proportion in the total deformation of institute's organic frame of frame i during unit rolling specific standard band
λi max={ 0.6,0.45,0.4,0.3,0.2 },
Permit minimum mill speed V in the unit operation of rolling0=520m/min；
During the above is various, i is corresponding shelf number.
In step S02, the steel grade and specification characteristic parameter for intending expanding product are given, including：
The initial strength σ of bands0=380MPa,
Strain hardening coefficient ks=1.2,
The width B=812mm of band,
The original depth h of supplied materials0=2.0mm,
Intend expanding the target thickness h of specification product5=0.17mm；
In step S03, main technique lubricating regime parameter is collected, including：
The flow flow of 1-5# frame emulsionsi={ 1050,1120,1210,1080,1130 } L/min,
The initial temperature T of emulsionwd=58 DEG C,
Concentration C=4.2% of emulsion；
In step S04, procedure parameter involved during rolling efficiency lifting is calculated is defined, including：
The reduction distribution value λ of frame ii, i.e. the deformation of frame i proportion in the total deformation of institute's organic frame,
Deformation step-size in search Δ λ=0.01,
Frame 1-4 outlet tension force Ti,
Tension force step-size in search Δ T=5MPa,
The reduction ratio ε of tandem mills frame ii,
Maximum mill speed search value Vmax0,
Maximal rate search parameter s,
The reduction ratio ε of frame 1-5i,
The exit thickness h of frame 1-4i,
The outlet mill speed v of frame 1-4i,
The draught pressure P of frame 1-5iWith rolling power Fi；
In view of in live actual production, when each frame is rolled, the ratio of its deformation distribution should exceed band
The least amount of deformation distribution ratio λ that the frame relevant device is allowedi min, it is related that the outlet tension force of frame 1-4 should be greater than each frame
The minimum tension License Value T that equipment is allowedi min, so the step of the present embodiment in S05, each process variable assigns initial value such as
Under：
The original allocation value λ of the drafts of frame 11=λ1min=0.25, outlet tension force initial value T1=T1min=80MPa,
The original allocation value λ of the drafts of frame 22=λ2min=0.2, outlet tension force initial value T2=T2min=80MPa,
The original allocation value λ of the drafts of frame 33=λ3min=0.15, outlet tension force initial value T3=T3min=80MPa,
The original allocation value λ of the drafts of frame 44=λ4min=0.1, outlet tension force initial value T4=T4min=80MPa；
In step S06, the original allocation value λ of the drafts of frame 5 is calculated5=1- λ1-λ2-λ3-λ4=0.3；
In step S07, maximal rate search parameter s=0 is made；
In step S08, maximum mill speed search value V is calculatedmax0=V0+ 0.5s=520m/min；
Step S10 calculates draught pressure and rolling power, its basic procedure according to the device parameter of unit with technological parameter
As shown in Fig. 2 comprising the following steps S11 to S13：
In step s 11, according to original depth h0, target thickness h5With the reduction distribution value λ of frame 1-5i, calculate：
The reduction ratio ε of each framei=(0.229,0.237,0.234,0.203,0.765),
The exit thickness h of frame 1-4i=(1.55,1.182,0.906,0.722) mm；
During the above is various, i is corresponding shelf number.
In step s 12, according to the principle that second flow is equal, calculate：
The outlet mill speed v of frame 1-4i=(57.03,74.79,95.57,122.44) m/min；
In step s 13, with entrance tension force Ti-1, outlet tension force Ti, reduction ratio εi, initial strength σs0, strain hardening coefficient
It is ks, mill speed be vi, the width B of band, inlet thickness be hi-1With exit thickness hiIt is primary condition, calculates each frame
Draught pressure P in the case of current process lubricating regime, rolling procedureiWith rolling power Fi：
Pi=(618.36,611.87,510.64,450.70,6756.41) t,
Fi=(231.56,283.69,286.68,243.2,6576.44) Kw；
Certain fluctuation is there is in view of live tension force, draught pressure should ensure that certain safety is remaining with rolling power
Amount, therefore, in step S14, carry out comprehensive descision using unit security admission coefficient η, it is ensured that the safe clearance of Rolling Production,
Judge inequalityWhether set up,
In this embodiment, it is clear that inequality is invalid, it is transferred to step S22；
In the step s 21, s=s+1 is made, step S08 is transferred to；
In step S22, inequality V is judgedmax0- 0.5 ＞ V0Whether set up, if inequality is set up, make V0=Vmax0-
0.5, it is transferred to step S05；Until inequality is invalid, step S23 is transferred to；
In view of the fluctuation situation of tension force, in step S23, inequality is judgedWhether set up, in formula, λi
And TiTo correspond to the array of each shelf number i respectively.
The obvious inequality of original state is set up, then λiIncrease deformation step-size in search Δ λ, a TiIncrease a tension force search
Step delta T, redistributes deflection and outlet tension value, is transferred to step S06；Until inequality is invalid, step S24 is transferred to；
Finally, in step s 24, the maximum mill speed V for obtaining will be searched formax0=Vmax0- 0.5=896m/min conducts
Control parameter, sends the roll control system of five Stands Cold Tandem Mill groups to, realizes the lifting of unit rolling efficiency.
Unit can reach to the maximum stable mill speed of the specification product after the embodiment can be seen that optimization
896m/min, and unit is using before correlation technique of the present invention, actual largest production speed is only 780m/min or so,
Maximum mill speed improves 14.87%, illustrates that correlation computations of the present invention can be good at improving the production efficiency of unit,
Economic benefit is brought to scene.
Those of ordinary skill in the art is it should be appreciated that the embodiment of the above is intended merely to illustrate of the invention
Technical scheme, and be not used as being limitation of the invention, it is any based on connotation of the invention to embodiment described above
Change, the modification made, will all fall in scope of the claims of the invention.
Claims (2)
1. a kind of rolling efficiency method for improving for being suitable for five Stands Cold Tandem Mill groups, for the rolling of five Stands Cold Tandem Mill groups
Control system, it is characterised in that described rolling efficiency method for improving is comprised the following steps：
S01：The device parameter and technological parameter of five Stands Cold Tandem Mill groups are collected, including：The working roll roll neck D of frame 1-5iw,
Frame 1-5 milling trains maximum draught pressure setting value P allowableimax, frame 1-5 milling trains maximum rolling power setting value F allowableimax, open
Volume machine uncoiling tension T0, frame 1-4 milling trains outlet tension force maximum of T allowableimax, frame 1-4 milling trains outlet tension force minimum value allowable
Timin, crimping machine curl tension T5, unit security admission coefficient η；The deformation of frame i is in institute during unit rolling specific standard band
The minimum value λ of proportion in the total deformation of organic frameimin, the deformation of frame i is all during unit rolling specific standard band
The maximum λ of proportion in the total deformation of frameimax, minimum mill speed V is permitted in the unit operation of rolling0, wherein, i is right
The shelf number answered, unit security admission coefficient η=0.85-0.95；
S02：The given steel grade and specification characteristic parameter for intending expanding product, including band initial strength σs0, strain hardening coefficient
ks, the width B of band, the original depth h of supplied materials0, intend expanding the target thickness h of specification product5；
S03：Collect main technique lubricating regime parameter, including 1-5# frame emulsions flow flowi, the initial temperature of emulsion
Degree Twd, the concentration C of emulsion；
S04：Procedure parameter involved during rolling efficiency lifting is calculated is defined, including：The reduction distribution value λ of frame ii, deformation
Step-size in search Δ λ, frame 1-4 outlet tension force Ti, tension force step-size in search Δ T, the reduction ratio ε of tandem mills frame ii, maximum rolls
Speed search value V processedmax0, the reduction ratio ε of maximal rate search parameter s, frame 1-5i, the exit thickness h of frame 1-4i, frame
The outlet mill speed v of 1-4i, and frame 1-5 draught pressure PiWith rolling power Fi；
S05：The original allocation value λ of the given drafts of frame 11=λ1min, outlet tension force initial value T1=T1min, the drafts of frame 2
Original allocation value λ2=λ2min, outlet tension force initial value T2=T2min, the original allocation value λ of the drafts of frame 33=λ3min, go out
Mouth tension force initial value T3=T3min, the original allocation value λ of the drafts of frame 44=λ4min, outlet tension force initial value T4=T4min；
S06：Calculate the original allocation value λ of the drafts of frame 55=1- λ1-λ2-λ3-λ4；
S07：Make maximal rate search parameter s=0；
S08：Calculate maximum mill speed search value Vmax0=V0+0.5s；
S10：Device parameter according to unit calculates draught pressure P with technological parameteriWith rolling power Fi；
S14：Comprehensive descision is carried out using unit security admission coefficient η, it is ensured that the safe clearance of Rolling Production, judge inequalityWhether set up, if inequality is set up, be transferred to step S21；If inequality is invalid, step S22 is transferred to；
S21：S=s+1 is made, step S08 is transferred to；
S22：Judge inequality Vmax0- 0.5 ＞ V0Whether set up, if inequality is set up, make V0=Vmax0- 0.5, it is transferred to step
S05；Until inequality is invalid, step S23 is transferred to；
S23：Judge inequalityWhether set up, if inequality is set up, λiIncrease a deformation step-size in search Δ
λ、TiIncrease a tension force step-size in search Δ T, redistribute the reduction distribution value and outlet tension value of each frame, be transferred to step
S06；Until inequality is invalid, step S24 is transferred to；
S24：The maximum mill speed search value V for obtaining will be searched formax0=Vmax0- 0.5 used as control parameter, sends five frames to
The roll control system of tandem mills.
2. the rolling efficiency method for improving for being suitable for five Stands Cold Tandem Mill groups according to claim 1, it is characterised in that
Described step S10 is comprised the following steps：
S11：According to original depth h0, target thickness h5With the reduction distribution value λ of frame 1-5i, calculate the pressure of each frame
The computation model of rate and exit thickness, wherein reduction ratio is：
Each rack outlet THICKNESS CALCULATION model is：hi=hi-1(1-εi)；
During the above is various, i is corresponding shelf number；
S12：According to the equal principle of second flow, the outlet mill speed of computer rack 1-4Wherein, v5It is frame 5
Maximum mill speed search value in outlet mill speed, that is, step S08；
S13：With entrance tension force Ti-1, outlet tension force Ti, reduction ratio εi, initial strength σs0, strain hardening coefficient ks, mill speed
vi, the width B of band, inlet thickness be hi-1With exit thickness hiIt is primary condition, calculates each frame and lubricated in current process
System, the draught pressure P under rolling procedure stateiWith rolling power Fi。
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| CN108144962A (en) * | 2016-12-05 | 2018-06-12 | 上海梅山钢铁股份有限公司 | A kind of cold continuous rolling OPTIMIZATION OF ROLLING method |
| CN109078989B (en) * | 2018-08-07 | 2020-01-07 | 东北大学 | Limit rolling speed prediction method of six-roller cold rolling mill |
| CN109926453B (en) * | 2019-03-29 | 2020-06-19 | 中冶南方工程技术有限公司 | Method for determining acceleration and deceleration rolling efficiency coefficient of single-stand reversible cold rolling mill |
| CN110918653B (en) * | 2019-11-28 | 2021-06-22 | 张家港扬子江冷轧板有限公司 | Optimized rolling method for same silicon steel with different hardness |
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