CN110434172A - A kind of sharing of load calculation method of furnace volume and mm finishing mill unit tandem rolling - Google Patents
A kind of sharing of load calculation method of furnace volume and mm finishing mill unit tandem rolling Download PDFInfo
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- CN110434172A CN110434172A CN201910642025.4A CN201910642025A CN110434172A CN 110434172 A CN110434172 A CN 110434172A CN 201910642025 A CN201910642025 A CN 201910642025A CN 110434172 A CN110434172 A CN 110434172A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/30—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
- B21B1/32—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
- B21B1/34—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by hot-rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/06—Thermomechanical rolling
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Abstract
The present invention provides the sharing of load calculation method of a kind of furnace volume and mm finishing mill unit tandem rolling, belongs to technical field of steel rolling.This method carries out steel grade race, finished product thickness and width stepping to the production outline of steckel rolling line first, determines that technique table is arranged；Then steekle mill and mm finishing mill unit are subjected to sharing of load calculating and optimization as a whole, two kinds of calculation methods are set, is automatically selected according to production steel grade；After the completion of furnace rolls up passage and the calculating of mm finishing mill unit sharing of load, mill rolling force and roll torque are calculated, mill capacity check is carried out, sharing of load calculating is completed if checking successfully；If it fails, carrying out furnace volume passage and mm finishing mill unit load optimal；If load reassigns optimization failure, carries out furnace volume and increase passage corrected Calculation, return again to step 2 and re-start sharing of load.This method is simple and practical, under the premise of ensuring equipment safety, effectively improves production stability and increases rolling line production yields.
Description
Technical field
The present invention relates to technical field of steel rolling, particularly relate to the sharing of load calculating side of a kind of furnace volume and mm finishing mill unit tandem rolling
Method.
Background technique
The steekle mill production line that the present invention is directed to uses 1+1+3 layout pattern, and capital equipment is 1 stepped heating
Furnace, the thick descaling mill of 1 high pressure water, the four-roller reversing rougher of the 1 attached edger roll of frame band, 1 flying shear, 1 high pressure crystal's de-scaling
Machine, 2 coiler furnaces (each 1 of steekle mill inlet/outlet side), 1 frame four-roller Steckel mill, 3 frame four-roller unidirectional type finish rolling
Machine, 1 set of cooling facility for laminar flow, 1 downcoiler.
The finish rolling area of steekle mill mainly includes 1 frame steekle mill and 3 frame finishing mills, and wherein steekle mill is that four-roller is reversible
Respectively there are a coiler furnace and a pinch roller in formula milling train, milling train front and back.Temperature in coiler furnace, which is adopted, computerizeds control, according to life
The difference of product kind and technique, meets the requirement for keeping the temperature intermediate base by 950~1150 DEG C of temperature range；Finishing mill is that four-roller can not
Inverse formula milling train, is equipped with Hydraulic Looper between steekle mill and finishing mill.Intermediate made-up belt is first by steekle mill entrance side coiler furnace
Under pass through, the first passes are carried out in steekle mill.After made-up belt head goes out milling train, batched by the pinch roller feeding of outlet side
Furnace is batched, and the reel of coiler furnace is synchronous with milling train；When made-up belt carries out reversible rolling, the pinch roller of entrance side send made-up belt
The coiler furnace for entering entrance side is batched, and the reel of same entrance coiler furnace is synchronous with milling train.In this way, made-up belt is in steekle mill
The rolling for carrying out 1~5 passage, then send mm finishing mill unit, at this time the last a time of steekle mill and mm finishing mill unit F1/F2/F3
Continuous rolling relationship is formed, finished product thickness is finally rolled into.
The main steel grade of the product mix of steekle mill production line is serial, the different steel such as ordinary steel, steel alloy and stainless steel
Kind requires difference to the sharing of load and production status of finish rolling area (furnace volume and mm finishing mill unit), needs to take different sharing of loads
Calculation method.
Energy dissipation method, opposite is routinely used to the sharing of load of conventional hot continuous rolling machine (1+6/1+7/1+8 etc.) mm finishing mill unit
The modes such as reduction ratio and roll-force ratio, have there is many research achievements.As patent 201710958271.1 proposes one kind
Novel Hot Strip Rolling load distribution method obtains roll-force distribution coefficient using Hybrid Particle Swarm Optimization, takes into account rolling
Energy consumption and Strip Shape Control requirement.Patent 201610729966.8 proposes a kind of load for improving hot rolled thin strip rolling stability point
Method of completing the square improves the rolling stability of thin gauge strip by optimizing the roll-force ratio of thin gauge strip F3~F6 milling train.Specially
Benefit 201610370594.4 proposes a kind of fine-rolling strip steel sharing of load setting method, passes through the iterative calculation of roll-force allocation model
The drafts of each rack is obtained, each rack roll-force rate fluctuations are big when solving rolling conditions change in pressure allocation model asks
Topic.Patent 201410338147.1 proposes a kind of productized hot rolling load distribution method, by hot rolling be divided into cold rolling material and
Variety steel, using different laod sharing modes.Patent 201811587492.3 proposes a kind of hot-tandem unit load point
Gauge load apportioning cost is converted to roll-force sharing of load value by the calculation method matched, and improves the accurate of roll-force distribution calculating
Property and strip threading stability.Patent 201810612729.2 proposes a kind of non-orientation silicon steel production mill load distribution method,
Improve belt plate shape by reducing the load of back segment rack in non-orientation silicon steel production and extends the rolling cycle.Document (band
The model of steel hot continuous rolling and control, metallurgical industry publishing house, 2002) describe the Energy dissipation method of mm finishing mill unit sharing of load.
The method that these documents propose can solve the sharing of load problem of conventional hot continuous rolling machine mm finishing mill unit, be not involved with steekle mill
Sharing of load problem.
To the sharing of load calculation method of steekle mill routinely using fixed road number and opposite reduction ratio by the way of, it is such as literary
It offers (research of steekle mill rolling procedure setting model, Wuhan University Of Technology's Master's thesis, 20080330) and describes one kind four
Roller reversing steckel mill is according to fixed road number, and different passages are according to drafts, the load of three kinds of roll-force, rolling power modes
The method that allocation proportion carrys out setting model regulation.Document (peace steel steekle mill high precision process Controlling model application study, steel rolling
Automation, 2018,35 (6)) describe the main models situation of Anyang 3450mm steekle mill Process Control System.
The method that above-mentioned document proposes can solve conventional hot continuous rolling machine mm finishing mill unit sharing of load and steekle mill single chassis
The calculation method of sharing of load is not involved with the Load Calculation Method of furnace volume and mm finishing mill unit tandem rolling.The present invention proposes one kind
The sharing of load calculation method of furnace volume and mm finishing mill unit tandem rolling, considers the different process of stainless steel, straight carbon steel and other steel alloys
Feature both takes into account production stability using different sharing of load calculations, while playing milling train maximum capacity, improves and produces
Line production yields.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of sharing of load calculation methods of furnace volume and mm finishing mill unit tandem rolling.
Steekle mill is usually made of equipment such as heating furnace, reversible mill, coiling machines, is applicable in Medium and Heavy Plate Rolling and production
Stainless steel, steel alloy etc., usually have that surface quality is poor, cannot produce the defects of thin gauge.Furnace volume is taken into account at present and tandem rolling is special
A kind of 1+1+3 steekle mill producing line of point, mainly by the four-roller reversing rougher of the 1 attached edger roll of frame band, 2 coiler furnace (furnaces
Each 1 of rolling machine inlet/outlet side), 1 frame four-roller Steckel mill, 3 frame four-roller unidirectional type finishing mills, 1 set of section cooling
The equipment such as device, 1 downcoiler composition.Novel furnace rolls up tandem rolling producing line and is producing carbon steel, stainless steel and when steel alloy, can be with
Produce the thin gauge strip of high quality.But different steel grades have different technique requirements, for example production carbon steel is mainly pursued and produced
Amount, production stainless steel will guarantee production stability and surface quality.So needing a kind of flexible sharing of load calculating side of control
Method takes into account different steel grade production requirements and process characteristic.
The present invention is based on the novel steekle mill producing lines for being configured with 1+1+3 type.It is stainless that main production steel grade, which is 200,
Steel, 300 be stainless steel and 400 are stainless steel, straight carbon steel, Hot rolling Low alloy Steel coil of strip.Slab thickness 220mm, finished product target are thick
Spend 2.0~16.0mm, 24~40mm of workpiece thickness.
It is as follows that the method comprising the steps of:
It (1) is N according to steel grade race stepping to the production outline of steckel rolling lineCShelves are N according to finished product thickness steppingHShelves, are pressed
It is N according to finished width steppingBShelves；Finish rolling area process parameter table is established, technique table is set as NmShelves；
(2) measured data is exported according to roughing, calculates roughing and exports actual (real) thickness, roll up inlet thickness as furnace；It obtains thick
Roll intermediate base developed width, intermediate base length and intermediate base temperature；
(3) steel grade is produced according to rolling scaduled middle raw material, automatically selects furnace volume sharing of load calculation, the energy on HMI
It is enough that the method for salary distribution is intervened；
(4) furnace volume sharing of load calculation is divided to two kinds, wherein sharing of load calculation one are as follows: stationary furnace rolls up passage
The mode of several and furnace volume percentage pass reduction, mm finishing mill unit reduction ratio, rolls up inlet thickness according to furnace and finished product target thickness calculates furnace
Roll up the pressure distribution of passage and mm finishing mill unit；
Sharing of load calculation two are as follows: stationary furnace rolls up the mode of exit thickness and mm finishing mill unit reduction ratio, and furnace rolls up passage
Number and passage sharing of load are calculated automatically by steekle mill maximum capacity, and inlet thickness is rolled up according to furnace and furnace rolls up exit thickness
Furnace volume passage pressure distribution is calculated, export target thickness is rolled up according to furnace and finished product target thickness calculates the pressure point of mm finishing mill unit
Match；
(5) obtain furnace volume and finish rolling exit thickness after, running temperature forecasting model, draught pressure forecast model and rolling function
Rate model calculates furnace volume, finish rolling roll-force and rolling power, carries out mill capacity check, load point is then completed after checking successfully
With calculating process；
(6) after mill capacity checks failure, carry out furnace volume passage and mm finishing mill unit load optimal, optimization principles by passage or
Rack affluence ability the maximum priority principle returns in step (4) and re-starts sharing of load, the process repeated optimization n times；
When calculating furnace volume passage or finishing rolling mill maximum affluence ability, according to following rule:
A) first passage or rack ability transfinite, and are assigned to other passages or rack according to equal proportion principle；
B) extreme trace time or rack transfinite, and the value that transfinites is increased in load small other passages or rack；
C) remaining passage or rack ability transfinite, and are assigned to other passages or rack according to equal proportion principle.
(7) load is redistributed after optimization failure (re-optimization number is more than n times), if using sharing of load calculating side
Formula one, system carries out warning note, and exits sharing of load calculating process；If carried out using sharing of load calculation two
Furnace volume increases passage (+2) corrected Calculation, returns again to step (4) and re-starts sharing of load calculating, if the road Lu Juan number is
Reach maximum road number, system carries out warning note, and exits sharing of load calculating process.
Wherein, in step (1) according to product mix production steel grades all to steckel rolling line be divided into stainless steel, straight carbon steel and
The big series of steel alloy three, NCIt is set as 20, NHIt is 15, NBIt is 5；
Finish rolling area process parameter table includes roughing export target thickness, finish rolling area laod sharing mode, the road Lu Juan number, furnace
Roll up export target thickness, furnace volume reduction ratio and mm finishing mill unit reduction ratio, Nm=NC×NB×NH。
Specifically, in finish rolling area process parameter table:
1) roughing export target thickness: it is set as NmShelves, as roughing rolling schedule calculation foundation；
2) finish rolling area laod sharing mode: including mode one and mode two, it is set as NCShelves；
3) road Lu Juan number: it is used for mode one, is set as NmShelves；
4) furnace rolls up export target thickness: being used for mode two, is set as NmShelves
5) furnace rolls up reduction ratio: furnace rolls up each percentage pass reduction default value, is set as NmShelves；
6) mm finishing mill unit reduction ratio: finishing rolling mill reduction ratio default value is set as NmShelves.
Roughing outlet actual (real) thickness and target thickness compare in step (2), thick using roughing target if gone beyond the scope
Degree, as the inlet thickness of steekle mill, calculation formula is as follows:
H0=GapEnd-(FSEnd+RDEnd+OFEnd+WRTCEnd+WRWCEnd+WRSCEnd+ZPEnd)
In formula, H0For roughing exit thickness, mm；GapEnd: roughing extreme trace time actual measurement gap values between rollers, mm；FSEndFor roughing extreme trace
Bounce distance, mm；RDEndFor rolls' deformation influence amount, mm；OFEndFor oil film thickness influence amount, mm；WRTCEndFor thermal forming influence amount,
mm；WRWCEndFor roll wear influence amount, mm；WRSCEndFor roll roll shifting influence amount, mm；ZPEndFor acyclic homologically trioial position, mm.
When raw material production steel grade is stainless steel and steel alloy in step (3), stainless steel and steel alloy in production will be as far as possible
Production stability is kept, the sub-distribution of the road Lu Juan and mm finishing mill unit load are solidified after optimization, keep technological parameter and model
The stability of setting, therefore use sharing of load calculation one；When raw material production steel grade is straight carbon steel, straight carbon steel is in production
Production yields is pursued as far as possible, plays milling train maximum capacity, and the use time few as far as possible completes rolling, and default is calculated using sharing of load
Mode two.
Sharing of load calculation one in step (4) specifically: the road Lu Juan number and furnace volume percentage pass reduction, essence has been determined
After mill stand reduction ratio, inlet thickness and finish rolling product outlet thickness are rolled up according to furnace, using furnace roll up each passage and mm finishing mill unit as
It is whole to carry out sharing of load calculating, it is iterated and true reduction ratio, entrance that furnace rolls up each passage and each rack of finish rolling is calculated
With exit thickness value；The calculation formula of reduction ratio iterative calculation correction factor a is as follows in an iterative process:
In formula: h3For F3 rack outlet target thickness, product target thickness, mm；h3 *For F3 rack outlet calculated thickness,
It is worth after last iteration, mm；R is passage or rack with respect to reduction ratio,Wherein, H is inlet thickness, and h is outlet
Thickness.
Sharing of load calculation two in step (4) specifically: furnace volume passage is calculated automatically by steekle mill maximum capacity
Road number and passage sharing of load roll up inlet thickness according to furnace and furnace roll out a mouthful THICKNESS CALCULATION furnace volume passage pressure distribution, according to
Furnace rolls up export target thickness and finished product target thickness calculates the pressure distribution of mm finishing mill unit, defaults the road Lu Juan number for most port volume
Passage is set as 1.
It includes: reduction ratio, nip angle, roll-force and rolling power that mill capacity, which checks item, in step (5), each examination is all
It is necessarily less than the limitation of milling train maximum capacity value.Specifically:
A) rolling mill screwdown rate is checked: it is limited according to producing line process conditions:
B) milling train nip angle is checked: being limited according to producing line and steel grade process conditions；
C) milling train maximum rolling force is checked: being limited according to equipment maximum capacity；
D) it milling train maximum motor power limit: is limited according to equipment maximum capacity.
N≤10 in step (6).
Using in sharing of load calculation two in step (7), fail if the ability parameter of mm finishing mill unit is checked, and
Redistributing optimization number transfinites, and optimizes to furnace volume export target thickness, return step re-starts sharing of load in (4)
Calculating process；
When carrying out the calculating of the road Lu Juan number, the road Lu Juan number is up to 5.
The advantageous effects of the above technical solutions of the present invention are as follows:
In above scheme, it is suitable for the steekle mill producing line of 1+1+3 (n), is used in stainless steel, straight carbon steel and steel alloy
Different sharing of load calculation methods takes into account production stability and improves rolling mill yield.Certain steekle mill producing line is online at home
Engineering application is tested and carries out, practice have shown that, to the production line that this stainless steel and carbon steel are taken into account, using load of the invention
Calculation method is convenient, flexible, can satisfy different demands, and control method is easy to operate, it is easy to accomplish, it is suitble to all similar
The control system of production line uses.
Detailed description of the invention
Fig. 1 is that the sharing of load calculation method laod sharing mode one of furnace volume and mm finishing mill unit tandem rolling of the invention calculates stream
Cheng Tu；
Fig. 2 is that the sharing of load calculation method laod sharing mode two of furnace volume and mm finishing mill unit tandem rolling of the invention calculates stream
Cheng Tu；
Fig. 3 is that the control that the sharing of load calculation method sharing of load of furnace volume and mm finishing mill unit tandem rolling of the invention calculates is total
Body flow chart.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
The present invention provides the sharing of load calculation method of a kind of furnace volume and mm finishing mill unit tandem rolling.
As shown in figure 3, that the method comprising the steps of is as follows:
It (1) is N according to steel grade race stepping to the production outline of steckel rolling lineCShelves are N according to finished product thickness steppingHShelves, are pressed
It is N according to finished width steppingBShelves；Finish rolling area process parameter table is established, technique table is set as NmShelves；
(2) measured data is exported according to roughing, calculates roughing and exports actual (real) thickness, roll up inlet thickness as furnace；It obtains thick
Roll intermediate base developed width, intermediate base length and intermediate base temperature；
(3) steel grade is produced according to rolling scaduled middle raw material, automatically selects furnace volume sharing of load calculation, the energy on HMI
It is enough that the method for salary distribution is intervened；
(4) furnace volume sharing of load calculation is divided to two kinds, wherein as shown in Figure 1, sharing of load calculation one are as follows: Gu
The mode of the road Ding Lujuan number and furnace volume percentage pass reduction, mm finishing mill unit reduction ratio, rolls up inlet thickness and finished product target according to furnace
THICKNESS CALCULATION furnace rolls up the pressure distribution of passage and mm finishing mill unit；
As shown in Fig. 2, sharing of load calculation two are as follows: the side of stationary furnace volume exit thickness and mm finishing mill unit reduction ratio
Formula, furnace roll up passage and by steekle mill maximum capacity calculate number and passage sharing of load automatically, according to furnace roll up inlet thickness and
Furnace rolls out a mouthful THICKNESS CALCULATION furnace volume passage pressure distribution, rolls up export target thickness according to furnace and finished product target thickness calculates finishing mill
The pressure distribution of group；
(5) obtain furnace volume and finish rolling exit thickness after, running temperature forecasting model, draught pressure forecast model and rolling function
Rate model calculates furnace volume, finish rolling roll-force and rolling power, carries out mill capacity check, load point is then completed after checking successfully
With calculating process；
(6) after mill capacity checks failure, carry out furnace volume passage and mm finishing mill unit load optimal, optimization principles by passage or
Rack affluence ability the maximum priority principle returns in step (4) and re-starts sharing of load, the process repeated optimization n times；
(7) after load redistributes optimization failure, if system carries out alarm and mentions using sharing of load calculation one
Show, and exits sharing of load calculating process；If carrying out furnace volume using sharing of load calculation two and increasing passage amendment meter
Calculate, return again to step (4) and re-start sharing of load calculating, if the road Lu Juan number has reached the maximum number, system into
Row warning note, and exit sharing of load calculating process.
It is explained combined with specific embodiments below.
This method is applied on certain furnace volume hot rolling line, is configured using the type of 1+1+3.
1) steekle mill production line slab specification are as follows: slab thickness 220mm, 900~1600mm of width of plate slab, finished product target
2.0~16.0mm of thickness, 24~40mm of workpiece thickness.Produce steel grade are as follows: 200 be stainless steel (201), 300 be stainless steel
(304,316), 400 be stainless steel (410S, 430), structural carbon steel (Q235), low-alloy steel (Q345), small steel grade (304L,
316L、2205)。
2) product mix steel grade is divided into Nc=20 grades, is replaced respectively with material code P01~P20, width is divided into NB=5
Shelves, thickness are divided into NH=15 grades, other point of model technique surface layer NmShelves, NmCalculation method are as follows: Nm=NC×NB×NH=20*5*15
=1500.According to the stepping range in material in table 1, width and thickness stepping table, rolling scaduled middle incoming slab and at items
The calculating of scale value progress technique table stepping serial number.
1 material width and thickness stepping table of table
| Stepping number | Material code Ci | Represent steel grade | Thickness stepping h (mm) | Width stepping Bi(mm) |
| 1 | P01 | 201 | h<2.1 | B<1100 |
| 2 | P02 | 2.1≤h<2.5 | 1100≤B<1200 | |
| 3 | P03 | 2.5≤h<2.8 | 1200≤B<1300 | |
| 4 | P04 | 304304L | 2.8≤h<3.0 | 1300≤B<1400 |
| 5 | P05 | 316316L | 3.0≤h<3.3 | 1400≤B<1600 |
| 6 | P06 | 3.3≤H<3.5 | ||
| 7 | P07 | 410S | 3.5≤H<4.0 | |
| 8 | P08 | 430 | 4.0≤H<4.5 | |
| 9 | P09 | 2205 | 4.5≤H<5.1 | |
| 10 | P10 | 5.1≤H<5.5 | ||
| 11 | P11 | Q235 | 5.5≤H<6.0 | |
| 12 | P12 | Q345 | 6.0≤H<8.0 | |
| 13 | P13 | 8.0≤H<10.6 | ||
| 14 | P14 | 10.6≤H<13.2 | ||
| 15 | P15 | 13.2≤H<16.0 | ||
| 16 | P16 | |||
| 17 | P17 | |||
| 18 | P18 | |||
| 19 | P19 | |||
| 20 | P20 |
3) maximum rolling force of steekle mill is 4500Ton, and motor maximum power is 2*7000KW, and percentage pass reduction is maximum
50%, 20 degree of maximum nip angle；Finish rolling milling train maximum rolling force is 4000Ton, and motor maximum power is 7000KW, rolling mill screwdown
Rate maximum 50%, 20 degree of maximum nip angle.
Embodiment one
Select steel grade 304, slab thickness 220mm, width of plate slab 1270mm, finished product target thickness 6.0mm, workpiece thickness
38mm.According to the stepping range in material in table 1, width and thickness stepping table, in calculator memory sequence number since 0,
Steel grade material code is P04, width stepping number 3, thickness stepping number 12, and sequence number is respectively as follows: C in corresponding calculator memoryi=
3, Bi=2, Hi=11, computation model technique surface layer alias:
Nm=Ci×NB×NH+Bi×NH+Hi=3 × 5 × 15+2 × 15+11=266
It is as follows that finish-rolling process table is searched from other 266 serial number of layer:
Finish rolling laod sharing mode sets table: selection laod sharing mode one；
The road Lu Juan number technique table: the road Lu Juan number is defaulted as 3；
Furnace rolls up percentage pass reduction table: numerical value is respectively 33,33,30；
Mm finishing mill unit reduction ratio table: numerical value is respectively 25,21,14；
Finish rolling area furnace rolls up regulation calculating process are as follows: by roughing extreme trace time measured value, calculating workpiece thickness is 39.26mm
(hot), intermediate base actual measurement width is 1287.81mm (hot), and intermediate base length is 59.78m (hot), and intermediate base temperature is
1015 degree.
Calculation process according to figure 1, the results are shown in Table 2 with finish rolling sharing of load for furnace volume, next according to temperature
Forecasting model, draught pressure forecast model calculate rolling temperature and roll-force, rolling power that furnace rolls up each passage and each rack of finish rolling
Deng；
2 304 regulation sample calculation table of table
Rolling schedule calculation result and milling train maximum capacity are compared, furnace roll up each passage and each rack of finish rolling reduction ratio,
Nip angle, roll-force and rolling power, which are checked, all to be passed through, and sharing of load calculates successfully.
Embodiment two
Select steel grade Q235, slab thickness 220mm, width of plate slab 1380mm, finished product target thickness 3.0mm, intermediate base thickness
Spend 28mm.According to the stepping range in material in table 1, width and thickness stepping table, sequence number is opened from 0 in calculator memory
Begin, steel grade material code is P11, width stepping number 3, thickness stepping number 5, and sequence number is respectively as follows: C in corresponding calculator memoryi
=10, Bi=2, Hi=4, computation model technique surface layer alias:
Nm=Ci×NB×NH+Bi×NH+Hi=10 × 5 × 15+2 × 15+4=784
It is as follows that finish-rolling process table is searched from other 784 serial number of layer:
√ finish rolling laod sharing mode sets table: selection laod sharing mode two；
The road √ Lu Juan number technique table: the road Lu Juan number is defaulted as 1；
√ furnace rolls up export target thickness: numerical value 7.0；
√ furnace rolls up percentage pass reduction table: numerical value is respectively 38,38,33；
√ mm finishing mill unit reduction ratio table: numerical value is respectively 29,26,17；
Finish rolling area furnace rolls up regulation calculating process are as follows: by roughing extreme trace time measured value, calculating workpiece thickness is 28.36mm
(hot), intermediate base actual measurement width is 1395.83mm (hot), and intermediate base length is 81.13m (hot), and intermediate base temperature is
982 degree.
Calculation process according to Fig.2, the results are shown in Table 3 with finish rolling sharing of load for furnace volume, sets the road Lu Juan number
It is 1, according to inlet thickness and exit thickness, calculates rolling temperature, roll-force and rolling power, calculate roll-force, rolling power
Deng；
3 Q235 regulation sample calculation table of table (recycles) for the first time
Furnace rolls up passage P1 reduction ratio 75.14% in table 3, is more than that furnace rolls up passage maximum depression rate 50%, carries out furnace and roll up passage
Then+2 operation of number re-starts furnace volume sharing of load calculates, and running temperature is forecast and draught pressure forecast model calculates etc., calculates
The results are shown in Table 4.
4 Q235 regulation sample calculation table (final result) of table
Rolling schedule calculation result and milling train maximum capacity are compared, furnace roll up each passage and each rack of finish rolling reduction ratio,
Nip angle, roll-force and rolling power, which are checked, all to be passed through, and sharing of load calculates successfully.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of sharing of load calculation method of furnace volume and mm finishing mill unit tandem rolling, it is characterised in that: comprise the following steps that
It (1) is N according to steel grade race stepping to the production outline of steckel rolling lineCShelves are N according to finished product thickness steppingHShelves, according at
Product width stepping is NBShelves；Finish rolling area process parameter table is established, technique table is set as NmShelves；
(2) measured data is exported according to roughing, calculates roughing and exports actual (real) thickness, roll up inlet thickness as furnace；It obtains in roughing
Between base developed width, intermediate base length and intermediate base temperature；
(3) steel grade is produced according to rolling scaduled middle raw material, automatically selects furnace volume sharing of load calculation, it can be right on HMI
The method of salary distribution is intervened；
(4) furnace volume sharing of load calculation be divided to two kinds, wherein sharing of load calculation one are as follows: stationary furnace roll up road number with
Furnace rolls up the mode of percentage pass reduction, mm finishing mill unit reduction ratio, rolls up inlet thickness according to furnace and finished product target thickness calculates the road Lu Juan
Secondary and mm finishing mill unit pressure distributes；
Sharing of load calculation two are as follows: stationary furnace rolls up the mode of exit thickness and mm finishing mill unit reduction ratio, and furnace rolls up passage and presses furnace
Rolling machine maximum capacity calculates number and passage sharing of load automatically, rolls up inlet thickness according to furnace and furnace rolls out a mouthful THICKNESS CALCULATION
Furnace rolls up passage pressure distribution, is distributed according to the pressure that furnace rolls up export target thickness and finished product target thickness calculating mm finishing mill unit；
(5) after obtaining furnace volume and the exit thickness of finish rolling, running temperature forecasting model, draught pressure forecast model and rolling power mould
Type calculates furnace volume, finish rolling roll-force and rolling power, carries out mill capacity check, sharing of load meter is then completed after checking successfully
Calculation process；
(6) after mill capacity checks failure, furnace volume passage and mm finishing mill unit load optimal are carried out, optimization principles press passage or rack
Rich ability the maximum priority principle returns in step (4) and re-starts sharing of load, the process repeated optimization n times；
(7) after load redistributes optimization failure, if using sharing of load calculation one, system carries out warning note, and
Exit sharing of load calculating process；If carrying out furnace volume using sharing of load calculation two and increasing passage corrected Calculation, then return
It goes back to step (4) and re-starts sharing of load calculating, if the road Lu Juan number has reached the maximum number, system carries out alarm and mentions
Show, and exits sharing of load calculating process.
2. the sharing of load calculation method of furnace volume and mm finishing mill unit tandem rolling according to claim 1, it is characterised in that: the party
Method, which is applied, is configured to the production line that+1 frame furnace of 1 frame roughing rolls up+3 rack finish rolling tandem rollings in hot-rolled strip production line.
3. the sharing of load calculation method of furnace volume and mm finishing mill unit tandem rolling according to claim 1, it is characterised in that: described
Being divided into stainless steel, straight carbon steel and steel alloy three greatly according to product mix production steel grades all to steckel rolling line in step (1) is
Column, NCIt is set as 20, NHIt is 15, NBIt is 5；
Finish rolling area process parameter table includes that roughing export target thickness, finish rolling area laod sharing mode, the road Lu Juan number, furnace roll out
Mouth target thickness, furnace volume reduction ratio and mm finishing mill unit reduction ratio, Nm=NC×NB×NH。
4. the sharing of load calculation method of furnace volume and mm finishing mill unit tandem rolling according to claim 1, it is characterised in that: described
Roughing exports actual (real) thickness in step (2)
H0=GapEnd-(FSEnd+RDEnd+OFEnd+WRTCEnd+WRWCEnd+WRSCEnd+ZPEnd)
In formula, H0For roughing exit thickness, mm；GapEnd: roughing extreme trace time actual measurement gap values between rollers, mm；FSEndFor roughing extreme trace time spring
Amount, mm；RDEndFor rolls' deformation influence amount, mm；OFEndFor oil film thickness influence amount, mm；WRTCEndFor thermal forming influence amount, mm；
WRWCEndFor roll wear influence amount, mm；WRSCEndFor roll roll shifting influence amount, mm；ZPEndFor acyclic homologically trioial position, mm.
5. the sharing of load calculation method of furnace volume and mm finishing mill unit tandem rolling according to claim 1, it is characterised in that: described
When raw material production steel grade is stainless steel and steel alloy in step (3), using sharing of load calculation one；Raw material produces steel grade
When straight carbon steel, using sharing of load calculation two.
6. the sharing of load calculation method of furnace volume and mm finishing mill unit tandem rolling according to claim 1, it is characterised in that: described
Sharing of load calculation one in step (4) specifically: the road Lu Juan number and furnace volume percentage pass reduction, finishing rolling mill pressure has been determined
After lower rate, inlet thickness and finish rolling product outlet thickness are rolled up according to furnace, furnace is rolled up into each passage and mm finishing mill unit and is carried out as a whole
Sharing of load calculates, and is iterated and furnace is calculated to roll up the true reduction ratio of each passage and each rack of finish rolling, entrance and exit thick
Angle value；The calculation formula of reduction ratio iterative calculation correction factor a is as follows in an iterative process:
In formula: h3For F3 rack outlet target thickness, product target thickness, mm；h3 *For F3 rack outlet calculated thickness, i.e., on
It is worth after secondary iteration, mm；R is passage or rack with respect to reduction ratio,Wherein, H is inlet thickness, and h is exit thickness.
7. the sharing of load calculation method of furnace volume and mm finishing mill unit tandem rolling according to claim 1, it is characterised in that: described
Sharing of load calculation two in step (4) specifically: furnace roll up passage by steekle mill maximum capacity calculate automatically number and
Passage sharing of load rolls up inlet thickness according to furnace and furnace rolls out a mouthful THICKNESS CALCULATION furnace volume passage pressure distribution, rolls out mouth according to furnace
Target thickness and finished product target thickness calculate the pressure distribution of mm finishing mill unit, and the default road Lu Juan number is most port volume passage, if
It is set to 1.
8. the sharing of load calculation method of furnace volume and mm finishing mill unit tandem rolling according to claim 1, it is characterised in that: described
It includes: reduction ratio, nip angle, roll-force and rolling power that mill capacity, which checks item, in step (5), each examination is all necessarily less than
The limitation of milling train maximum capacity value.
9. the sharing of load calculation method of furnace volume and mm finishing mill unit tandem rolling according to claim 1, it is characterised in that: described
N≤10 in step (6).
10. the sharing of load calculation method of furnace volume and mm finishing mill unit tandem rolling according to claim 1, it is characterised in that: institute
It states in step (7) using in sharing of load calculation two, if the ability parameter of mm finishing mill unit checks failure, and divides again
It transfinites with optimization number, furnace volume export target thickness is optimized, sharing of load is re-started in return step (4) and calculated
Journey；
When carrying out the calculating of the road Lu Juan number, the road Lu Juan number is up to 5.
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