CN106126941A - A kind of cold mill complex modeling power method - Google Patents

A kind of cold mill complex modeling power method Download PDF

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CN106126941A
CN106126941A CN201610487049.3A CN201610487049A CN106126941A CN 106126941 A CN106126941 A CN 106126941A CN 201610487049 A CN201610487049 A CN 201610487049A CN 106126941 A CN106126941 A CN 106126941A
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power
rolling
strip steel
roll
computing formula
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CN106126941B (en
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杨杰
宋健
胡琦
许昊
赵琨
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China University of Geosciences
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China University of Geosciences
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    • G16INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
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Abstract

A kind of cold mill complex modeling power method.The present invention is directed to pickling continuous-rolling power feature, provide a kind of method that pickling tandem rolling produces the modeling of the line power of the assembling unit, pickling tandem rolling is produced the high-power unit controlled by frequency conversion motor in line and establishes electrical power model, descaling bath is established thermal power model, and electrical power model and thermal power Model coupling are become unified power module.Unit based on electrical power of the present invention is as a example by rolling-mill housing, straightener, crimping machine, and the modeling method of other units is similar to therewith;Thermal power modeling method is similar with electrical power modeling method.The power module that the present invention is set up can be that follow-up cold-rolling process energy efficiency research provides basis, it is also possible to is processed energy consumption assessment and prediction.The power module explicit physical meaning set up, reasonable, simple and accurate, solve the problem that pickling tandem rolling produces line unit energy efficiency evaluation.

Description

A kind of cold mill complex modeling power method
Technical field
The invention provides a kind of modeling power method of pickling-Continuous mill train, belong to the energy optimization neck of cold mill complex Territory.
Background technology
(ton steel poor than comprehensive energy consumption 7.47%, coking process differs from 4.96% to Chinese Steel Industry process energy consumption in 2010, refining Ferrum differs from 17.45%, and steel rolling differs from 49.85%) in rolling mill practice energy consumption lag behind international most advanced level 49.85%, be various operations Energy consumption disparity, energy-saving and cost-reducing potentiality are the biggest.Therefore, improve the efficiency of cold rolling process unit energy resource consumption, have important Meaning.
Set up pickling-tandem rolling and produce the model of line unit output, be possible not only to describe and assessment pickling-tandem rolling product line machine The energy service condition of group, it is also possible to instruct the research of subsequent power efficiency optimization.In the research of current energy efficiency evaluation, " energy stream (Energy Flow) " has become as a kind of effective ways assessing manufacturing industry efficiency, and grinding in machine tool field Studying carefully the level having reached comparative maturity, Huang saves a kind of based on conservation of energy principle the numerical control turning energy consumption model of flood proposition Precision has reached more than 99% (HUANG Zhengtao, ZHANG Chaoyong, LUO Min.An Assessment Model of Energy Consumption for NC Turning Process Based on Principle of Conservation ofEnergy[J].Chinese Mechanical Engineer,2015,18(26):2419-2421)。 Cold rolling process is entirely different with traditional machine tool structure of energy consumption as multi-source energy consumption production procedure, is used by the energy flow model of lathe To cold mill complex, carrying out complex energy flow point analysis from the polyergic source such as electric, hot, the energy consumption for cold rolling process controls and efficiency is excellent Change and there is practical significance and wide application prospect.
The analysis and research of the power module of Ferrous Metallurgy at present the most all concentrate on the operations such as steel-making and continuous casting.Zhao Yeqing (Zhao Yeqing.Research on Energy Flow Network Model in Iron and Steel Enterprises Based on Hybird Petri Net[J].Metallurgical IndustryAutomation, 2014,38 (5): 27-28) steel industry process from raw material to hot rolling has been carried out point by the method for applied energy stream and material stream Analysis.Zhu Lihong and Wang Junfei (Zhu Lihong, Wang Junfei, Zhang Feng.Development of Energy Monitoring System Reheating Furnace in Hot Rolling Process[J].Engineering Control Computer, 2011,24 (5): 72-72) propose a kind of real-time energy of energy consumption monitoring heating furnace at course of hot rolling The system of consumption.Li Shanshan (Li Shanshan.Research on Energy Efficiency Assessment Method ofIron and Steel Production Process Based on Exergy Analysis[D].Jinan: Shandong University, 2013) propose a kind of based onThe energy consumption analysis method analyzed, produces mainly for iron and steel Steel making working procedure.And about cold rolling (Cold Rolling) operation, especially production procedure complexity, the unit related to, parameter Numerous pickling-tandem rolling produces line, and the power module of unit there are no document report.
The cold rolling high energy consumption operation produced as iron and steel, energy-saving potential is huge.It is numerous owing to producing line unit and technological parameter, Production process is complicated, and the research optimized about cold rolling efficiency is fewer, also lacks an accurate cold mill complex power module, comes Analyze relation between cold mill complex power and technological parameter.
Summary of the invention
The invention provides a kind of pickling-Continuous mill train modeling power method, for assessing and predict the energy consumption of unit, solve Determine deficiency of the prior art.
Realizing the technical scheme that above-mentioned purpose of the present invention used is:
A kind of cold mill complex modeling power method, comprises the following steps: (1), produce in line pickling-tandem rolling by frequency conversion motor The high-power unit controlled sets up electrical power model, and described electrical power model includes rolling-mill housing input power Pi, straightener defeated Enter power Pin, coiling machine input power Pim;Rolling-mill housing input power Pi=Pz+Pf1+Pf2, wherein PzFor merit needed for rolling mill practice Rate, Pf1For the power of roll neck Yu bearing friction loss, Pf2Power for roll Yu strip steel friction loss;Straightener input power Pin=Pj+Pm, wherein PjFor the power for straightening process, PmPower for smoothing roll Yu strip steel friction loss;Coiling machine inputs Power Pim=Pq+Pqm, wherein PqFor the power for strip coiling technique, PqmFor friction loss between reel axle journal and bearing Power;
(2) thermal power model set up by the descaling bath, to pickling-tandem rolling produced in line, and the input power of described descaling bath is Qin =Q1+Q2+Q3+Q4;Wherein Q1For for strip steel heating power, Q2For eo-acid heating power, Q3For the lost power of acid solution evaporation, Q4 Scatter and disappear power for equipment cooling;
(3), electrical power model and thermal power Model coupling are become unified power module.
P in step (1)zComputing formula as follows:
P z = 2 p ‾ b ‾ ψ ( R Δ h + ( c p R ‾ ) 2 + c p ‾ R ) 2 × n 0 h 0 h i η ,
WhereinFor rolling unit pressure,For rolling the mean breadth of front and back band steel, ψ is rolling fore arm coefficient, and Δ h is pressure Lower amount, R is the radius of roll, and c is the coefficient relevant with technique, n0For breast roller rotating speed, hiThickness during i milling train is gone out for strip steel Degree, η is the motor transmission efficiency to milling train;
Pf1Computing formula be:
Wherein p is roll-force, d1For roll neck diameter, f is the coefficient of friction between axle journal and bearing;
Pf2Computing formula be:
Wherein Mf2、Mf1For moment of friction, i is the gear ratio of drive mechanism.
P in step (1)jComputing formula be:
Wherein v is the speed that strip steel runs, σsFor the yield strength of steel grade, r0For the initial curvature of strip steel, knFor strip steel warp Crossing remnant curvature during the n-th smoothing roll, E is the elastic modelling quantity of strip steel;
PmComputing formula be:
Wherein μ and μ1It is respectively working roll and back-up roll bearing coefficient of friction, d and d1It is respectively working roll and backing roll Beaming roller diameter, f1For the coefficient of rolling friction between working roll and backing roll,For adjacent upper and lower two roller lines and vertical wire clamp Angle cosine value, t is adjacent lower roll center of circle distance, DgFor lower roller diameter, DzFor upper roller diameter.
P in step (1)qComputing formula be:
Wherein T is tension force during curling, and P is curling point action power;
PqmComputing formula be: Pqm=Ff2d2v5,
Wherein, F be volume weight with tension force make a concerted effort, f2For the coefficient of friction of axle journal, d2For crimping machine journal diameter, v5For volume Bent machine cylinder rotating speed.
Q in step (2)1Computing formula be:
Wherein b is the width of strip steel, and h is belt steel thickness, and v is that strip steel is at acid cleaning process running speed, ρ1Close for strip steel Degree, C1For the specific heat capacity of strip steel, t1Temperature when descaling bath, t is entered for strip steel2Final temperature for strip steel;
Q2Computing formula be: Q2=qC2(t2-t1),
Wherein q is the flow of eo-acid, C2For the specific heat capacity of eo-acid, t1For eo-acid temperature, t2For acid liquor temperature in descaling bath;
Q3Computing formula be: Q3=kS1,
Wherein K is evaporative heat loss coefficient, S1For evaporation liquid surface area;
Q4Computing formula be:
Wherein λ2For equipment heat conductivity, S2For equipment list area, Δ t is the equipment inside and outside wall temperature difference, d2For device thickness.
Electrical power and electric thermal power are coupled by the present invention after becoming a unified power module, are expressed as follows:
P z = 2 p b ‾ ψ ( R Δ h + ( c p ‾ R ) 2 + c p ‾ R ) 2 η × n 0 h 0 h 1 P f = [ ( 1 η - 1 ) M Z + pd 1 f i + pd 1 f + ( 0.03 ~ 0.06 ) M H ] × n 0 h 0 h 1 . . . Q 1 = bhvρ 1 C 1 ( t 2 - t 1 ) 1000 Q 2 = qC 2 ( t s 2 - t s 1 ) Q 3 = kS 1 Q 4 = λ 2 S 2 Δ t d 2
Compared with prior art, the invention have the advantages that
1. pickling-the tandem rolling that present invention is generally directed to cold rolling process produces line, by analyzing the spy of unit input-output power Property and mechanism, establish electrical power model and thermal power model.Being different from traditional power module, the present invention is by electrical power model Unified power module is become with thermal power Model coupling.Solve current pickling-tandem rolling product line and lack a kind of energy efficiency evaluation side The problem of method, provides theoretical foundation for follow-up efficiency optimizing research simultaneously.
2. the method theoretical method based on energy stream that the present invention proposes, exports with unit according to the power being input to unit The equal principle of power, each power of each unit is exported and decomposes, and set up relevant with technological parameter respectively Equilibrium equation, it is thus achieved that power module more accurate, as shown in Figure 1.
3. pickling-Continuous mill train the power module using the inventive method to set up, only need to be given the size of strip steel in contract, The parameters such as elastic modelling quantity, can quickly obtain accurate required power, have certain forecast function in actual production.
Accompanying drawing explanation
The pickling that Fig. 1 provides for the present invention-total schematic diagram of milling train group power module;
Fig. 2 is iterative process schematic diagram.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and example, to this Invention is further elaborated.Instantiation described herein, only in order to explain the present invention, is not used to limit this Bright.
The power that the power module that the present invention is set up can be used for needed for the strip steel of different cultivars is added man-hour is predicted, Also basis can be provided for follow-up efficiency optimizing research.As a example by power prediction, the process energy consumption of unit all with the technique of strip steel There is the relation of a kind of mapping in parameter, the power module set up is actually about the equation of technological parameter, equation from Variable is the parameter of strip steel self, and dependent variable is the value of output.The parameter of product is updated to model equation, it is possible to real Now process prediction and the assessment of required power.Model self should have certain reliability and accuracy, the data in table 1 The data provided from certain cold rolling mill, as comparison.
Table 1 pickling-tandem rolling produces line unit motor model
Machine name Motor model Capacity (Kw)
Seven roller straighteners 1PQ8355-6PM80-Z 200
No. 1 frame TDZBS 4174-4 4174
No. 2 frames TDZBS 5250-4 5250
No. 3 frames TDZBS 5250-4 5250
No. 4 frames TDZBS 5250-4 5250
No. 5 frames TDZBS 5250-4 5250
Coiling machine TDZBS 2850-4 2850
Belong to procedural style production owing to pickling-tandem rolling produces line, there is successional feature, once start and can not arbitrarily stop Machine, so what the parameter in model cannot the most directly be surveyed.Present invention pickling based on certain cold rolling mill-tandem rolling produces line The power module set up, relates to unit parameter and obtains from the data of the offer of this cold rolling mill;The parameter relevant with technique will Obtained by documents and materials.
As a example by single rolling-mill housing, implementation to the present invention does detailed specific description below, and straightener inputs The modeling of the input power of power, coiling machine input power and descaling bath all can refer to following method, does not enters in the present embodiment Row is tired one by one to be stated.
The unit technological parameter occurred in power module in the present embodiment is as shown in table 2:
Table 2 Model Parameter value
The power equation of rolling mill practice is:
P z = 2 p ‾ b ‾ ψ ( R Δ h + ( c p R ‾ ) 2 + c p ‾ R ) 2 × n 0 h 0 h i η
Parameter in table 2 obtains equation below after substituting into
P z = 1.05 p ‾ b ‾ ( 300 Δ h + ( 3.22 × 10 - 3 p ‾ ) 2 + 3.22 × 10 - 3 p ‾ ) 2 × n 0 h 0 h 1
Above-mentioned equation only remainsBeing uncertain, need to be iterated trying to achieve by formula (a), (b), iterative process is such as Shown in Fig. 2:
p ‾ = 95 e 0.05 l ′ h - 1 0.05 l ′ h ‾ - - - ( a )
l ′ = 300 Δ h + ( 3.22 × 10 - 3 p ‾ ) 2 + 3.22 × 10 - 3 p ‾ - - - ( b )
Unit width rolling pressure is obtained according to above-mentioned iterative methodBring in rolling mill practice power module, obtain one with strip steel Self technological parameter is the equation of independent variable.Rolling mill practice merit can be obtained according to the technological parameter of the strip steel that will process self Rate Pz
Calculate as a example by No. 1 frame, from the contract detail that certain cold rolling mill provides, take 5 kinds of strip steel at random as sample This, be updated to equation by its dimensional parameters, and the milling train power demand rolling different steel grade corresponding drawn is listed in shown in table 3:
Table 3 unit power demand is predicted
In table 3, the inlet thickness of 5 kinds of strip steel samples, exit thickness and width are all from that certain cold rolling mill year provides Part contract is detailed.According to calculating the data of acquisition in table, 5 kinds of samples are processed required rolling power in No. 1 frame and are divided 1982.8Kw, 2304.1Kw, 2577.6Kw, 3046.5Kw, 4028.9Kw, in table 1, the capacity motor of No. 1 frame is 4174Kw, The power of model prediction is less than the capacity of gantry motor, and rolling power increases with the increase of belt steel thickness.Can from above Know that the model that the present invention is set up has certain reliability, practical engineering application has certain value.
As it will be easily appreciated by one skilled in the art that and the foregoing is only embodiments of the invention, not in order to limit The present invention processed, all any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, should be included in Within protection scope of the present invention.

Claims (5)

1. a cold mill complex modeling power method, it is characterised in that comprise the following steps:
(1), pickling-tandem rolling is produced the high-power unit controlled by frequency conversion motor in line and set up electrical power model, described electrical power Model includes rolling-mill housing input power Pi, straightener input power Pin, coiling machine input power Pim;Rolling-mill housing input power Pi=Pz+Pf1+Pf2, wherein PzFor rolling mill practice power demand, Pf1For the power of roll neck Yu bearing friction loss, Pf2For roll with The power of strip steel friction loss;Straightener input power Pin=Pj+Pm, wherein PjFor the power for straightening process, PmFor aligning Roller and the power of strip steel friction loss;Coiling machine input power Pim=Pq+Pqm, wherein PqFor the merit for strip coiling technique Rate, PqmFor the power of friction loss between reel axle journal and bearing;
(2) thermal power model set up by the descaling bath, to pickling-tandem rolling produced in line, and the input power of described descaling bath is Qin=Q1+ Q2+Q3+Q4;Wherein Q1For for strip steel heating power, Q2For eo-acid heating power, Q3For the lost power of acid solution evaporation, Q4For setting The lost power of standby heat radiation;
(3), electrical power model and thermal power Model coupling are become unified power module.
Cold mill complex modeling power method the most according to claim 1, it is characterised in that: P in step (1)zComputing formula As follows:
P z = 2 p ‾ b ‾ ψ ( R Δ h + ( c p R ‾ ) 2 + c p ‾ R ) 2 × n 0 h 0 h i η ,
WhereinFor rolling unit pressure,For rolling the mean breadth of front and back band steel, ψ is rolling fore arm coefficient, and Δ h is pressure Amount, R is the radius of roll, and c is the coefficient relevant with technique, n0For breast roller rotating speed, hiThickness during i milling train is gone out for strip steel, η is the motor transmission efficiency to milling train;
Pf1Computing formula be:
Wherein p is roll-force, d1For roll neck diameter, f is the coefficient of friction between axle journal and bearing;
Pf2Computing formula be:
Wherein Mf2、Mf1For moment of friction, i is the gear ratio of drive mechanism.
Cold mill complex modeling power method the most according to claim 1, it is characterised in that: P in step (1)jComputing formula For:
Wherein v is the speed that strip steel runs, σsFor the yield strength of steel grade, r0For the initial curvature of strip steel, knFor strip steel through Remnant curvature during n smoothing roll, E is the elastic modelling quantity of strip steel;
PmComputing formula be:
Wherein μ and μ1It is respectively working roll and back-up roll bearing coefficient of friction, d and d1It is respectively working roll and the beaming roller of backing roll Diameter, f1For the coefficient of rolling friction between working roll and backing roll,More than adjacent upper and lower two roller lines and vertical line angle String value, t is adjacent lower roll center of circle distance, DgFor lower roller diameter, DzFor upper roller diameter.
Cold mill complex modeling power method the most according to claim 1, it is characterised in that: P in step (1)qComputing formula For:
Wherein T is tension force during curling, and P is curling point action power;
PqmComputing formula be: Pqm=Ff2d2v5,
Wherein, F be volume weight with tension force make a concerted effort, f2For the coefficient of friction of axle journal, d2For crimping machine journal diameter, v5For crimping machine Drum rotation speed.
Cold mill complex modeling power method the most according to claim 1, it is characterised in that: Q in step (2)1Computing formula For:
Wherein b is the width of strip steel, and h is belt steel thickness, and v is that strip steel is at acid cleaning process running speed, ρ1For strip steel density, C1 For the specific heat capacity of strip steel, t1Temperature when descaling bath, t is entered for strip steel2Final temperature for strip steel;
Q2Computing formula be: Q2=qC2(t2-t1),
Wherein q is the flow of eo-acid, C2For the specific heat capacity of eo-acid, t1For eo-acid temperature, t2For acid liquor temperature in descaling bath;
Q3Computing formula be: Q3=kS1,
Wherein K is evaporative heat loss coefficient, S1For evaporation liquid surface area;
Q4Computing formula be:
Wherein λ2For equipment heat conductivity, S2For equipment list area, Δ t is the equipment inside and outside wall temperature difference, d2For device thickness.
CN201610487049.3A 2016-06-28 2016-06-28 A kind of cold mill complex modeling power method Expired - Fee Related CN106126941B (en)

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* Cited by examiner, † Cited by third party
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CN107392491A (en) * 2017-08-02 2017-11-24 中国地质大学(武汉) A kind of method for evaluating cold rolled strip steel production complex energy efficiency
CN109829219A (en) * 2019-01-22 2019-05-31 中国地质大学(武汉) Continuous rolling mill roller speed change energy flow model and tandem mill energy flow model modeling method
CN112462699A (en) * 2020-11-02 2021-03-09 湖南华菱涟源钢铁有限公司 Hot rolling production power consumption management system and method
CN113010980A (en) * 2021-03-04 2021-06-22 西南石油大学 exergy analysis-based comprehensive energy efficiency testing method for numerical control machine tool
CN114406006B (en) * 2022-04-01 2022-06-03 承德建龙特殊钢有限公司 Seamless steel pipe tracking production system one by one

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101934290B (en) * 2009-06-30 2014-04-16 上海宝信软件股份有限公司 Load allocation adjusting method for stainless steel tandem cold rolling mill
CN102266865B (en) * 2011-05-30 2013-04-17 山东大学 Hot/cold rolling load distribution method
CN104998913B (en) * 2015-06-29 2017-03-15 东北大学 The Forecasting Methodology of power of motor during a kind of cold rolling

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107392491A (en) * 2017-08-02 2017-11-24 中国地质大学(武汉) A kind of method for evaluating cold rolled strip steel production complex energy efficiency
CN109829219A (en) * 2019-01-22 2019-05-31 中国地质大学(武汉) Continuous rolling mill roller speed change energy flow model and tandem mill energy flow model modeling method
CN112462699A (en) * 2020-11-02 2021-03-09 湖南华菱涟源钢铁有限公司 Hot rolling production power consumption management system and method
CN113010980A (en) * 2021-03-04 2021-06-22 西南石油大学 exergy analysis-based comprehensive energy efficiency testing method for numerical control machine tool
CN114406006B (en) * 2022-04-01 2022-06-03 承德建龙特殊钢有限公司 Seamless steel pipe tracking production system one by one

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