CN103406361B - Based on the aluminum cold-rolling mill rolling procedure generation method of materials behavior and parameter curve - Google Patents

Abstract

The present invention relates to the aluminum cold-rolling mill rolling procedure generation method based on materials behavior and parameter curve, according to raw material and the product parameters requirement of aluminium volume, with the intermediate annealing process parameter in finished material state determination rolling procedure, with technological parameters such as parameter curve determination rolling pass number and each passage thickness, mill speeds, again according to calculated with mathematical model rolling procedure controling parameters and according to unit force-power parameter carry out check revise, realize aluminium volume rolling procedure automatic generation.The method according to technological requirement and empirical data determine a certain material finished product state definition and parameter curve after, rolling procedure can be realized for the aluminium volume of this material various sizes specification automatically to generate, and be convenient to carry out maintenance expansion according to material, form systematized rolling procedure generation technique.

Description

Based on the aluminum cold-rolling mill rolling procedure generation method of materials behavior and parameter curve

Technical field

The present invention relates to a kind of rolling procedure making method being applicable to aluminum cold-rolling mill, particularly relate to the aluminum cold-rolling mill rolling procedure generation method based on materials behavior and parameter curve.

Background technology

At present, research for aluminum cold-rolling mill rolling procedure making method is less, lack mature and reliable, produce practical rolling procedure making method: one, the formulation of rolling procedure is main mainly with artificial experience greatly, lacks systematized rolling procedure making technology; Its two, aluminium cold rolling process factors can not be considered in comprehensive system ground, mostly only carry out sub-distribution from the angle of thickness, do not consider finished product conditions dictate, and on the same significant technological parameter such as speed, tension force of operation of rolling impact.

Aluminum cold-rolling mill production process is flexible and changeable, when being rolled procedure making for the various rolling specs of unlike material, need to consider the factors such as end properties requirement, material processing technique characteristic, the restriction of milling train force-power parameter, the scientific rationality of the rolling procedure automatically generated could be realized, to improve rolling process stability and production efficiency.

Based on above-mentioned purpose, design a kind of aluminum cold-rolling mill rolling procedure generation method based on materials behavior and parameter curve, have important practical significance.

Summary of the invention

The object of the invention is to overcome the deficiency that prior art exists, a kind of aluminum cold-rolling mill rolling procedure generation method based on materials behavior and parameter curve is provided.

Object of the present invention is achieved through the following technical solutions:

Based on the aluminum cold-rolling mill rolling procedure generation method of materials behavior and parameter curve, for the raw material product parameters requirement of aluminium volume, with the intermediate annealing process parameter in finished material state determination rolling procedure, with parameter curve determination rolling pass number and each passage thickness, mill speed, tension force technological parameter, go out to meet the rolling procedure controling parameters of unit force-power parameter restriction again according to calculated with mathematical model, realize the automatic generation of aluminium volume rolling procedure, step is as follows:

(1) rule of thumb and measured data, determine that finished product state defines according to material difference, and simulate the function parameter of reduction ratio curve, mill speed curve according to curvilinear function form;

(2) according to the requirement of aluminium volume raw material product parameters, the definition of product status poll material finished product state is rolled into by aluminium, obtain the accumulative reduction ratio needed for finished product state and corresponding product handling system operation mark, and the calculating of code intermediate anneal parameters is rolled according to the largest cumulative reduction ratio that this material allows, determine that (rolling section sequence number is k to total rolling hop count K, k=0 ..., K-1) and the gateway thickness of each rolling section;

(3) rolling schedule calculation of each rolling section is carried out successively, according to the gateway thickness of k rolling section, after reduction ratio, the mill speed curve section of determination rolling pass number and each passage thickness, mill speed, tension force technological parameter, then go out to meet the rolling procedure controling parameters of unit force-power parameter restriction according to calculated with mathematical model;

3a) according to the gateway thickness of k rolling section, according to the reduction ratio curve section of determination road number of times;

3b) according to k rolling Duan Duan road number of times, calculate each passage thickness distribute normal value according to standard criterion curve, the target reduction ratio ratio distributed as this road secondary segment thickness carries out thickness distribution;

After 3c) each passage thickness distributes, determine each passes speed according to rate curve, determine each passage gateway tension force according to tensiometer;

3d) according to the rolling procedure controling parameters of each passage of calculated with mathematical model this section, and carry out check correction according to unit power energy limit parameter;

(4) repeat step (3) and complete each section of code calculating, generate this volume rolling procedure.

Further, the above-mentioned aluminum cold-rolling mill rolling procedure generation method based on materials behavior and parameter curve, step is:

(1) rule of thumb and measured data, according to material difference, determine that finished product state defines, and simulate the function parameter of reduction ratio curve, mill speed curve according to curvilinear function form;

1a) in the definition of material finished product state, for various finished product state code, determine its accumulative reduction ratio required, product handling system operation, and the largest cumulative reduction ratio that this material allows;

1b) reduction ratio curve, adopts curvilinear function to describe thickness and the corresponding relation recommending reduction ratio, as follows:

ε＝b ₂·h ²+b ₁·h+b ₀

In formula: the recommendation reduction ratio that ε-this thickness is corresponding, %; H-passage thickness, mm; b ₂-reduction ratio curve coefficients, 1/mm ²; b ₁-reduction ratio curve coefficients, 1/mm; b ₀-reduction ratio conic constant;

1c) mill speed curve, adopts curvilinear function to describe thickness and the corresponding relation recommending mill speed, as follows:

V＝c ₁·ln(h)+c ₀

In formula: the recommendation mill speed that this thickness of V-is corresponding, m/min; c ₁-mill speed curve coefficients, 1/min; c ₀-mill speed conic constant, m/min;

(2) according to the requirement of aluminium volume raw material product parameters, the definition of product status poll material finished product state is rolled into by aluminium, obtain the accumulative reduction ratio needed for this finished product state and corresponding product handling system operation mark, and be rolled the calculating of code intermediate anneal parameters according to the largest cumulative reduction ratio that this material allows, and then determine the gateway thickness of total rolling hop count and each rolling section;

2a) according to the accumulative reduction ratio needed for finished product state, calculate the intermediate anneal gauge realized needed for this reduction ratio according to finished product thickness, as follows:

h _ann＝h _aim/(1-ε _aim/100)

In formula: h _annthe intermediate anneal gauge of-requirement, mm; h _aim-aluminium volume finished product thickness, mm; ε _aim-aluminium is rolled into the accumulative reduction ratio of product conditions dictate, %;

2b) according to the largest cumulative reduction ratio that this material allows, calculate each interior thickness successively according to raw thickness and largest cumulative reduction ratio, as follows:

h _mid[0]＝h _mat·(1-ε _max/100)

h _mid[j]＝h _mid[j-1]·(1-ε _max/100)j＝1,...,J

In formula: h _midthe interior thickness that [j]-largest cumulative reduction ratio is corresponding, mm; h _mat-aluminium volume raw thickness, mm; ε _maxthe largest cumulative reduction ratio that-aluminium coiled material matter allows, %; J-interior thickness sequence number; The maximum of J-interior thickness sequence number;

Work as h _mid[j] is less than the intermediate anneal gauge h needed for finished product state _anntime, h _mid[j]=h _ann, stop interior thickness calculating, j value is now the maximum sequence number J of interior thickness;

2c) according to the h that finished product state requires _ann, each intermediate anneal gauge h _mid[j] parameter, determines total rolling hop count;

Work as h _ann=h _aimtime, when namely finished product state requires without accumulative reduction ratio, K=J+1;

Work as h _ann>h _aimtime, when namely finished product state has an accumulative reduction ratio requirement, K=J+2;

In formula: the total rolling hop count of K-;

After 2d) determining total rolling hop count, according to the intermediate anneal gauge h needed for finished product state _ann, each intermediate anneal gauge h _mid[j] parameter determines the gateway parameter of each rolling section, as follows:

h _dmat[k]＝h _mat,h _daim[k]＝h _mid[k],k＝0

h _dmat[k]＝h _mid[k-1],h _daim[k]＝h _mid[k],k＝1,...,K-2

h _dmat[k]＝h _mid[k-1],h _daim[k]＝h _aim,k＝K-1

In formula: k-rolling section sequence number; h _midthe interior thickness that-largest cumulative reduction ratio is corresponding, mm; h _dmatthe inlet thickness of [k]-kth rolling section, mm; h _daimthe exit thickness of [k]-kth rolling section, mm;

(3) rolling schedule calculation of each k rolling section is carried out successively, according to the gateway thickness of k rolling section, after reduction ratio, the mill speed curve section of determination rolling pass number and each passage thickness, mill speed, tension force technological parameter, then go out to meet the rolling procedure controling parameters of unit force-power parameter restriction according to calculated with mathematical model;

3a) according to the gateway thickness of k rolling section, calculate each interim thickness successively according to reduction ratio curve, as follows:

h _temp[0]＝h _dmat[k]·(1-ε _temp[0]/100)

ε _temp[0]＝b ₂·h _dmat[k] ²+b ₁·h _dmat[k]+b ₀

h _temp[i]＝h _temp[i-1]·(1-ε _temp[i]/100)i＝1,...,N[k]-1

ε _temp[i]＝b ₂·h _temp[i] ²+b ₁·h _temp[i]+b ₀

In formula: h _tempthe interim thickness of [i]-calculate successively, mm; ε _temp[i]-according to the recommendation reduction ratio of reduction ratio curve according to THICKNESS CALCULATION, %; The road sequence number of i-k rolling section; N [k]-k rolling Duan Zong road number of times, works as h _temp[i] <=h _daimtime [k], stop the calculating successively of interim thickness, now i+1 is k rolling Duan Zong road times N [k];

3b) according to k rolling Duan Duan road number of times, calculate each passage thickness according to standard criterion curve and distribute normal value, as follows:

$G\left[i\right]=d_2\&CenterDot;{\left(\frac{5\&CenterDot;i}{N\left[k\right]}\right)}^2+d_1\&CenterDot;\left(\frac{5\&CenterDot;i}{N\left[k\right]}\right)+d_0$

In formula: G [i]-each passage normal value, %; d ₂, d ₁, d ₀-standard criterion curve coefficients;

Each passage thickness distributes normal value G [i] the target reduction ratio ratio distributed as this road secondary segment thickness, requires that each percentage pass reduction ratio after distributing meets following condition:

ε[i]:ε[i']＝G[i]:G[i']

h[0]＝h _dmat[k]·(1-ε[0]/100)

h[i]＝h[i-1]·(1-ε[i]/100)i＝1,...,N[k]

Wherein: ε [i]-Ben percentage pass reduction, %; The passage number of i, i '-Ben Dao secondary segment; Each passage exit thickness after h [i]-distribution, mm;

First, according to section gateway THICKNESS CALCULATION each passage average relative drafts; Secondly, each passage relative reduction is calculated according to section each passes normal value; Again, each passage exit thickness is calculated according to relative reduction; Again, according to the difference of section exit thickness calculated value and desired value, adjust each passage relative reduction, until section exit thickness is consistent with desired value, completes this section of thickness and distribute;

After 3c) each passage thickness distributes, determine each passes speed according to rate curve, as follows:

V[i]＝c ₁·ln(h[i])+c ₀

Wherein: the recommendation mill speed that V [i]-Ben passage thickness is corresponding, m/min;

After 3d) each passage thickness distributes, determine each passage gateway tension force according to tensiometer;

3e) according to the rolling procedure controling parameters of each passage of calculated with mathematical model this section, and check according to unit power energy limit parameter, this section of rolling procedure is revised until meet each restrictive condition when transfiniting, as follows:

P _min≤P[i]≤P _max

M[i]≤M _max

W[i]≤W _max

Wherein: P [i], P _min, P _maxthe calculated value of-draught pressure, minimum of a value, maximum, kN; M [i], M _maxthe calculated value of-roll torque, maximum, kN*m; W [i], W _maxthe calculated value of-rolling power, maximum, kW;

Each passes pressure, roll torque, rolling power force-power parameter are checked, calculating is re-started after revising this section of rolling pass number when draught pressure, roll torque transfinite, calculating is re-started, until meet each restrictive condition after revising this passes speed when rolling power transfinites;

(4) repeat the rolling schedule calculation that step (3) completes each rolling section, realize the automatic generation of this volume rolling procedure.

The substantive distinguishing features that technical solution of the present invention is outstanding and significant progress are mainly reflected in:

According to raw material and the product parameters requirement of aluminium volume, with the intermediate annealing process parameter in finished material state determination rolling procedure, with technological parameters such as parameter curve determination rolling pass number and each passage thickness, mill speeds, again according to calculated with mathematical model rolling procedure controling parameters and according to unit force-power parameter carry out check revise, realize aluminium volume rolling procedure automatic generation.Solve some unreasonable problems of rolling procedure making in prior art, one, the factors such as end properties requirement, material processing technique characteristic, the restriction of milling train force-power parameter are considered on comprehensive system ground; Its two, according to material finished product state definition and parameter curve be rolled procedure making, be convenient to according to material carry out maintenances expand, form systematized rolling procedure generation technique.This method can formulate scientific and reasonable rolling procedure for the different rolling specs of each material, and there is the features such as computational speed is fast, practical, be the important foundation realizing aluminium cold continuous rolling Process Control System, unit rolling process stability and production efficiency can be improved.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, technical solution of the present invention is described further:

Fig. 1: based on the realization flow schematic diagram of the aluminum cold-rolling mill rolling procedure generation method of materials behavior and parameter curve.

Detailed description of the invention

The invention provides a kind of aluminum cold-rolling mill rolling procedure generation method based on materials behavior and parameter curve, as Fig. 1, concrete flow process:

1) aluminium volume raw material product parameters reads, and obtains finished product state definition, reduction ratio parameter of curve, the mill speed parameter of curve of this material according to material inquiry;

2) according to aluminium volume finished product state, according to finished product state definition, intermediate anneal parameters is determined;

3) according to intermediate anneal parameters, determine total rolling hop count K (rolling section sequence number is k, k=0 ..., K-1);

4)k＝0；

5) k rolling section, from section inlet thickness, calculates lower passage thickness to the section of being less than exit thickness, the section of determination road number of times successively by pressure rate curve;

6) k rolling section, according to section gateway thickness and section road number of times, by pressure rate curve determination percentage pass reduction ratio, calculates each passage thickness;

7) k rolling section, according to each passage thickness, according to mill speed curve, tensiometer, determines passes speed and gateway tension force;

8) k rolling section, each passage is pressed the technological parameters such as thickness, speed, tension force and is calculated code controling parameters, and carries out check correction by unit force-power parameter, completes rolling schedule calculation;

9) k+1, returns 5) complete the rolling schedule calculation of whole roads secondary segment successively;

10) each rolling section calculates and terminates, and this aluminium volume rolling procedure generates and terminates.

For the rolling procedure generative process of certain 1850mm aluminium single-stand cold-rolling machine ideal format aluminium volume, be described in further detail technical solution of the present invention, aluminium volume parameter is as follows: material 5052, width 1600mm, raw thickness 8.0mm, finished product thickness 0.2mm, finished product state H12.

1) aluminium volume raw material product parameters reads, and material is 5052, obtains finished product state definition, reduction ratio parameter of curve, the mill speed parameter of curve of this material according to material inquiry;

2) according to aluminium volume finished product state H12, according to finished product state definition, requiring that finished product adds up reduction ratio is 25%, and the maximum permission of this material adds up reduction ratio is 90%, calculates intermediate anneal parameters;

According to the accumulative reduction ratio needed for finished product state, calculate the intermediate anneal gauge realized needed for this reduction ratio according to finished product thickness, as follows:

h _ann＝h _aim/(1-ε _aim/100)＝0.2/(1-25/100)＝0.25

The largest cumulative reduction ratio allowed according to this material, calculates each interior thickness successively according to raw thickness and largest cumulative reduction ratio, until it is less than the intermediate anneal gauge needed for finished product state:

h _mid[0]＝h _mat·(1-ε _max/100)＝8.0·(1-90/100)＝0.8

h _mid[1]＝h _mid[0]·(1-ε _max/100)＝0.8·(1-90/100)＝0.08

Due to h _mid[1] <=h _ann, then h _mid[1]=h _ann=0.25, interior thickness sequence number is 1 to the maximum, total rolling hop count K=3.

3) according to intermediate anneal parameters, divide rolling section, the gateway thickness of each rolling section is as follows:

h _dmat[k]＝h _mat＝8.0,h _daim[k]＝h _mid[k]＝0.8,k＝0；

h _dmat[k]＝h _mid[k-1]＝0.8,h _daim[k]＝h _mid[k]＝0.25,k＝1；

h _dmat[k]＝h _mid[k-1]＝0.25,h _daim[k]＝h _aim＝0.2,k＝2；

4)k＝0；

5) k rolling section, from section inlet thickness 8.0mm, calculates lower passage thickness to the section of being less than exit thickness 0.8mm successively by pressure rate curve, as shown in the table:

After calculating 6 times according to reduction ratio curve, the exit thickness section of being less than exit thickness 0.8mm, determines that the road times N [k] of this rolling section is 6.

6) k rolling section, according to the road number of times of k rolling section, calculates each passage thickness according to standard criterion curve (5 point curve) and distributes normal value, as follows:

$G\left[i\right]=d_2\&CenterDot;{\left(\frac{5\&CenterDot;i}{N\left[k\right]}\right)}^2+d_1\&CenterDot;\left(\frac{5\&CenterDot;i}{N\left[k\right]}\right)+d_0$

Carry out thickness Distribution Calculation according to mill condition value, require each percentage pass reduction ratio after distributing with each passes normal value than consistent, thickness allocation result is as follows:

7) k rolling section, according to each passage thickness, according to mill speed curve, tensiometer, determines passes speed and gateway tension force, as follows:

Sequence number

Inlet thickness

Exit thickness

Mill speed

Entrance tension force

Outlet tension force

--	mm	mm	m/min	MPa	MPa
						0	8.000	5.502	470.00	7.00	11.00
1	5.502	3.647	620.00	7.00	22.00
						2	3.647	2.395	720.00	15.76	25.03
3	2.395	1.602	780.00	19.03	27.99
						4	1.602	1.112	820.00	21.99	30.44
5	1.112	0.800	960.00	24.44	33.00

8) k rolling section, each passage is pressed the technological parameters such as thickness, speed, tension force and is calculated code controling parameters, and carries out check correction by unit force-power parameter, completes rolling schedule calculation, as follows:

9) k+1, returns 5) complete the rolling schedule calculation of whole roads secondary segment successively;

10) each rolling section calculates and terminates, and this aluminium volume rolling procedure generates and terminates, and result is as follows.

The raw material that the present invention rolls up according to aluminium and product parameters requirement, with the intermediate annealing process parameter in finished material state determination rolling procedure, with technological parameters such as parameter curve determination rolling pass number and each passage thickness, mill speeds, again according to calculated with mathematical model rolling procedure controling parameters and according to unit force-power parameter carry out check revise, realize aluminium volume rolling procedure automatic generation.Solve some unreasonable problems of rolling procedure making in prior art, one, the factors such as end properties requirement, material processing technique characteristic, the restriction of milling train force-power parameter are considered on comprehensive system ground; Its two, according to material finished product state definition and parameter curve be rolled procedure making, be convenient to according to material carry out maintenances expand, form systematized rolling procedure generation technique.This method can formulate scientific and reasonable rolling procedure for the different rolling specs of each material, and there is the features such as computational speed is fast, practical, be the important foundation realizing aluminium cold continuous rolling Process Control System, unit rolling process stability and production efficiency can be improved.

Below be only embody rule example of the present invention, protection scope of the present invention is not constituted any limitation.The technical scheme that all employing equivalents or equivalence are replaced and formed, all drops within rights protection scope of the present invention.

Claims (2)

1. based on the aluminum cold-rolling mill rolling procedure generation method of materials behavior and parameter curve, it is characterized in that: for the raw material product parameters requirement of aluminium volume, with the intermediate annealing process parameter in finished material state determination rolling procedure, with parameter curve determination rolling pass number and each passage thickness, mill speed, tension force technological parameter, go out to meet the rolling procedure controling parameters of unit force-power parameter restriction again according to calculated with mathematical model, realize the automatic generation of aluminium volume rolling procedure, step is:

(1) rule of thumb and measured data, determine that finished product state defines according to material difference, and simulate the function parameter of reduction ratio curve, mill speed curve according to curvilinear function form;

(2) according to the requirement of aluminium volume raw material product parameters, the definition of product status poll material finished product state is rolled into by aluminium, obtain the accumulative reduction ratio needed for finished product state and corresponding product handling system operation mark, and the calculating of code intermediate anneal parameters is rolled according to the largest cumulative reduction ratio that this material allows, determine that (rolling section sequence number is k to total rolling hop count K, k=0 ..., K-1) and the gateway thickness of each rolling section;

(3) rolling schedule calculation of each rolling section is carried out successively, according to the gateway thickness of k rolling section, after reduction ratio, the mill speed curve section of determination rolling pass number and each passage thickness, mill speed, tension force technological parameter, then go out to meet the rolling procedure controling parameters of unit force-power parameter restriction according to calculated with mathematical model;

3a) according to the gateway thickness of k rolling section, according to the reduction ratio curve section of determination road number of times;

3b) according to k rolling Duan Duan road number of times, calculate each passage thickness distribute normal value according to standard criterion curve, the target reduction ratio ratio distributed as this road secondary segment thickness carries out thickness distribution;

After 3c) each passage thickness distributes, determine each passes speed according to rate curve, determine each passage gateway tension force according to tensiometer;

3d) according to the rolling procedure controling parameters of each passage of calculated with mathematical model this section, and carry out check correction according to unit power energy limit parameter;

(4) repeat step (3) and complete each section of code calculating, generate this volume rolling procedure.

2. the aluminum cold-rolling mill rolling procedure generation method based on materials behavior and parameter curve according to claim 1, is characterized in that step is:

(1) rule of thumb and measured data, according to material difference, determine that finished product state defines, and simulate the function parameter of reduction ratio curve, mill speed curve according to curvilinear function form;

1a) in the definition of material finished product state, for various finished product state code, determine its accumulative reduction ratio required, product handling system operation, and the largest cumulative reduction ratio that this material allows;

1b) reduction ratio curve, adopts curvilinear function to describe thickness and the corresponding relation recommending reduction ratio, as follows:

ε＝b ₂·h ²+b ₁·h+b ₀

In formula: the recommendation reduction ratio that ε-this thickness is corresponding, %; H-passage thickness, mm; b ₂-reduction ratio curve coefficients, 1/mm ²; b ₁-reduction ratio curve coefficients, 1/mm; b ₀-reduction ratio conic constant;

1c) mill speed curve, adopts curvilinear function to describe thickness and the corresponding relation recommending mill speed, as follows:

V＝c ₁·ln(h)+c ₀

In formula: the recommendation mill speed that this thickness of V-is corresponding, m/min; c ₁-mill speed curve coefficients, 1/min; c ₀-mill speed conic constant, m/min;

(2) according to the requirement of aluminium volume raw material product parameters, the definition of product status poll material finished product state is rolled into by aluminium, obtain the accumulative reduction ratio needed for this finished product state and corresponding product handling system operation mark, and the calculating of code intermediate anneal parameters is rolled according to the largest cumulative reduction ratio that this material allows, and then determine that (rolling section sequence number is k to total rolling hop count K, k=0 ..., K-1) and the gateway thickness of each rolling section;

2a) according to the accumulative reduction ratio needed for finished product state, calculate the intermediate anneal gauge realized needed for this reduction ratio according to finished product thickness, as follows:

h _ann＝h _aim/(1-ε _aim/100)

In formula: h _annthe intermediate anneal gauge of-requirement, mm; h _aim-aluminium volume finished product thickness, mm; ε _aim-aluminium is rolled into the accumulative reduction ratio of product conditions dictate, %;

2b) according to the largest cumulative reduction ratio that this material allows, calculate each interior thickness successively according to raw thickness and largest cumulative reduction ratio, as follows:

h _mid[0]＝h _mat·(1-ε _max/100)

h _mid[j]＝h _mid[j-1]·(1-ε _max/100) j＝1,...,J

In formula: h _midthe interior thickness that [j]-largest cumulative reduction ratio is corresponding, mm; h _mat-aluminium volume raw thickness, mm; ε _maxthe largest cumulative reduction ratio that-aluminium coiled material matter allows, %; J-interior thickness sequence number; The maximum of J-interior thickness sequence number;

Work as h _mid[j] is less than the intermediate anneal gauge h needed for finished product state _anntime, h _mid[j]=h _ann, stop interior thickness calculating, j value is now the maximum sequence number J of interior thickness;

2c) according to the h that finished product state requires _ann, each intermediate anneal gauge h _mid[j] parameter, determines total rolling hop count;

Work as h _ann=h _aimtime, when namely finished product state requires without accumulative reduction ratio, K=J+1;

Work as h _ann>h _aimtime, when namely finished product state has an accumulative reduction ratio requirement, K=J+2;

In formula: the total rolling hop count of K-;

After 2d) determining total rolling hop count, according to the intermediate anneal gauge h needed for finished product state _ann, each intermediate anneal gauge h _mid[j] parameter determines the gateway parameter of each rolling section, as follows:

h _dmat[k]＝h _mat,h _daim[k]＝h _mid[k],k＝0

h _dmat[k]＝h _mid[k-1],h _daim[k]＝h _mid[k],k＝1,...,K-2

h _dmat[k]＝h _mid[k-1],h _daim[k]＝h _aim,k＝K-1

In formula: k-rolling section sequence number; h _midthe interior thickness that-largest cumulative reduction ratio is corresponding, mm; h _dmatthe inlet thickness of [k]-kth rolling section, mm; h _daimthe exit thickness of [k]-kth rolling section, mm;

(3) rolling schedule calculation of each k rolling section is carried out successively, according to the gateway thickness of k rolling section, after reduction ratio, the mill speed curve section of determination rolling pass number and each passage thickness, mill speed, tension force technological parameter, then go out to meet the rolling procedure controling parameters of unit force-power parameter restriction according to calculated with mathematical model;

3a) according to the gateway thickness of k rolling section, calculate each interim thickness successively according to reduction ratio curve, as follows:

h _temp[0]＝h _dmat[k]·(1-ε _temp[0]/100)

ε _temp[0]＝b ₂·h _dmat[k] ²+b ₁·h _dmat[k]+b ₀

h _temp[i]＝h _temp[i-1]·(1-ε _temp[i]/100) i＝1,...,N[k]-1

ε _temp[i]＝b ₂·h _temp[i] ²+b ₁·h _temp[i]+b ₀

In formula: h _tempthe interim thickness of [i]-calculate successively, mm; ε _temp[i]-according to the recommendation reduction ratio of reduction ratio curve according to THICKNESS CALCULATION, %; The road sequence number of i-k rolling section; N [k]-k rolling Duan Zong road number of times, works as h _temp[i] <=h _daimtime [k], stop the calculating successively of interim thickness, now i+1 is k rolling Duan Zong road times N [k];

3b) according to k rolling Duan Duan road number of times, calculate each passage thickness according to standard criterion curve and distribute normal value, as follows:

$G\left[i\right]=d_2\&CenterDot;{\left(\frac{5\&CenterDot;i}{N\left[k\right]}\right)}^2+d_1\&CenterDot;\left(\frac{5\&CenterDot;i}{N\left[k\right]}\right)+d_0$

In formula: G [i]-each passage normal value, %; d ₂, d ₁, d ₀-standard criterion curve coefficients;

Each passage thickness distributes normal value G [i] the target reduction ratio ratio distributed as this road secondary segment thickness, requires that each percentage pass reduction ratio after distributing meets following condition:

ε[i]:ε[i']＝G[i]:G[i']

h[0]＝h _dmat[k]·(1-ε[0]/100)

h[i]＝h[i-1]·(1-ε[i]/100) i＝1,...,N[k]

Wherein: ε [i]-Ben percentage pass reduction, %; The passage number of i, i '-Ben Dao secondary segment; Each passage exit thickness after h [i]-distribution, mm;

First, according to section gateway THICKNESS CALCULATION each passage average relative drafts; Secondly, each passage relative reduction is calculated according to section each passes normal value; Again, each passage exit thickness is calculated according to relative reduction; Again, according to the difference of section exit thickness calculated value and desired value, adjust each passage relative reduction, until section exit thickness is consistent with desired value, completes this section of thickness and distribute;

After 3c) each passage thickness distributes, determine each passes speed according to rate curve, as follows:

V[i]＝c ₁·ln(h[i])+c ₀

Wherein: the recommendation mill speed that V [i]-Ben passage thickness is corresponding, m/min;

After 3d) each passage thickness distributes, determine each passage gateway tension force according to tensiometer;

3e) according to the rolling procedure controling parameters of each passage of calculated with mathematical model this section, and check according to unit power energy limit parameter, this section of rolling procedure is revised until meet each restrictive condition when transfiniting, as follows:

P _min≤P[i]≤P _max

M[i]≤M _max

W[i]≤W _max

Wherein: P [i], P _min, P _maxthe calculated value of-draught pressure, minimum of a value, maximum, kN; M [i], M _maxthe calculated value of-roll torque, maximum, kN*m; W [i], W _maxthe calculated value of-rolling power, maximum, kW;

Each passes pressure, roll torque, rolling power force-power parameter are checked, calculating is re-started after revising this section of rolling pass number when draught pressure, roll torque transfinite, calculating is re-started, until meet each restrictive condition after revising this passes speed when rolling power transfinites;

(4) repeat the rolling schedule calculation that step (3) completes each rolling section, realize the automatic generation of this volume rolling procedure.