热轧板带头尾厚度精度控制技术

40420054IronandSteelVol.40No.4April2005100083AGCAGCAGCTG335.1A0449-749X200504-0046-03HeadandTailGaugeControlforHotRolledStripTONGChao-nanZHANGFeiPENGKai-xiangAutomationControlInstituteofUniversityofScienceandTechnologyBeijingBeijing100083ChinaAbstractWhenroughingmillareaofhotstripproductionlineadoptsreversingrolledstripsenterandexitstandsatahigh-erspeedthereforecoolingwaterinfluencesstripsˊheadsandtailsmoregreatlythanmainparts.Inadditionconsideringcoolingratesinairstripshavelowertemperatureontheirends.Meanwhiletheendsareinastateofnotensionorlesstension.SoconventionalAGCcannotcontrolthemefficiently.AimatreducingthicknessjumpinheadandtailofhotstripsthispaperputforwardanewcontrolmethodofTaperingHeadandTaperingTail.Themethodadoptsthecon-trolmodeoftaperingheadonlasttwostandsandtaperingtailtwicetoavoidtheshortcomingsoftraditionalAGCimproveheadandtailqualitygreatlyandreduceunexaminedlength.Themethodhasbeenusedinpracticewithgoodeffect.Anditisworthyofapplicationindomestichotrollingplants.KeywordshotrollingAGCtaperinghead/[e-mail]2004-05-08AGCAGCX100µm200～300µm12AGC4.0mm±80µm4.0mm±60µm10.5～1.0m30～50℃X10～15m120～180µmTaperHeadTaperHeadXTaperHead4R2HCBCSE2SG0E2SG1～SG6F1～F6L1～L5KB1Fig.1EquipmentofautomaticcontrolsystemGRAYF1F1tF2～F6tF6tF6F1F2p1p2p01p02F1p1p01F2p2p02F6F1F2F61KB3mF1F12AACpΔh=ΔS+ΔpC1ΔhΔSΔpCF1dF1vF1t=d/vF6tabcF5F6dABCDF6F52Fig.2SketchmapoftaperingheadF6F5F6ΔSi=-KHS0ii=562KHS0iFiKH1%～2%KH3%～5%F5F65%Δvi-1=CC+Q×1hi×ΔSivi-1i=563Δvi-1Fi-1FiAGC7440CQhiiSiivi-1Fi-15F62147～294kN0.025～0.050mm120.15～0.30mm12mAGCFi-1FiFiFi+1Fi+1Fi+2FiFi+12Fi-1Fi3Fi-2FiFi-1ΔSj=-KTS0jj=ii-14S0jFjKT0.1%～2%FiFi-2ΔSjFi-1ΔSjFi-2Fi-1FiFi+1FiFi+1FiFi+1abFii=126cABC3Fig.3Sketchmapoftaperingtailabc4Fig.4Gaugedeparturecurveoftaperingheadandtaperingtail8684404Fig.4Start-upcurveatTaigangNo.320044AOD415217020046AOD5AODVAI150t2006AODVAI-CON!-Quick==============================================48vihi=vi+1hi+155hiv0i1+fi=hi+1v0i+11+fi+16v0iv0i+1fifi+1FiFi+1Fi+16Fiv0ifihifihi64KT342.5mm10m97.5%±50m15m10m1.M.1998.TANGMou-feng.AoutomationofModernHotStripRollingM.BeijingMetallurgyIndustryPublishingHouse1998.2.M.2002.SUNYi-kang.ModelandControlofHotSrtipRollingM.BeijingMetallurgyIndustryPublishingHouse2002.3.M.1997.LIUJieSUNYi-kang.ComputerControlofHotStripRollingM.BeijingChinaMachinePress1997.4.M.1982.InterpretedbyCentralIronandSteelRe-searchInstituteofBeijingetc.JapanHotStripRollingTechnologyM.BeijingMetallurgyIndustryPublishingHouse1982.5.AGCJ.200219447-48.TONGChao-nanSUNYi-kangCHENBai-hong.KeyTechnologiesforScrewDownControlSystemofDCMotorDriveJ.SteelRolling200219447-48.68