平整轧制压力预测的边界润滑弹塑性模型

ISSN100020054CN1122223öN()JTsinghuaUniv(Sci&Tech),20034352003,Vol.43,No.512ö366252627,,(,,100084):2002207218:(59875046):(19652),(),,E2mail:[e-mail]:,s10%:s10%,,Á130,4.6%24.4%:20%,(30%):;;;:TH117.2:A:100020054(2003)0520625203ElastoplasticmodelwithboundarylubricationofrollingpressanalysisforskinpassLIUYing,CHENDarong,QINLi(StateKeyLaboratoryofTribology,DepartmentofPrecisionInstrumentsandMechanology,TsinghuaUniversity,Beijing100084,China)Abstract:Skinpassprocessingisakeystepinprocessingsteelsheetstoproducethedesciredregularsurfacetopographyandroughness.Theaccuracyoftherollingpresspredictionplaysanimportantroleinreproducingthetopography.Anelastoplasticmodelwasdevelopedbasedonthecharacteristicsoftheskinpassprocesswiththepressrates10%withboundarylubrication.Thetheoreticalanalysisshowedthattheelasticdeformationoftherollersandtheelasticrestorationofthesteelsheetssignificantlyaffecttherollingpresspredictionfors10%.Thecalculatedrelativeerroroftheelastoplasticmodelwithboundarylubricationtomeasurements,onatwo130cmdiameterrollertestbenchwithsequalto4.6%24.4%waslessthan20%whichismoreaccuratethanpredictionsoftherigidmodelwhoserelativeerroriscloseto30%.Keywords:boundarylubrication;skinpass;elastoplasticdeformation;rollingpress,,Karman[1],[26],,11.1(1):1),;2),;3);4);5),,,(Karman)dpdx-Kyõdydxfpy=0,(1):K,K=1.15Rs,Rs;y,y=(x);p;fp,fp=põL,L;+-,,,212,Hertz,l=x1+x2R$h+x22+x2,(2):x2=2R($1+$2),$1=2C1-M21PE1,$2=2C1-M22PE2;C;MPoisson;E;121.2,,,,,,[7]1.5%,5157Taylor[8]:Ge=Gd1+2.5UGf+25GdGf+Gd.(3):G;U;e,f,d(3),U=1.5%,,,,,,,,110nm,:,,,,,,,,,,,,,,[1],L=f(p).(4),,L=f(p)=L0y-yCy.(5):y1ö2,y=hxö2,1;yC1ö2,yC=hCö2;L0,1.3(2)(5)Karman(1),:dpdx-Kydydx+L0y-yCypy=0.(6)y=$h2lx+h2,626()2003,43(5)dx=2l$hdy.a=2l$h,dpdy-Ky+aL0y-yCypy=0.(7)p=e-2f0l$hlny+yCyC+Kye2f0l$hlny+yCydy,(8):C,f0,,(7),1:s=[(H-h)öH]100%(H,h1);E=[(WR-WE)öWR]100%;WR,WE1sö%WRökNWEökNEö%33.27.5111.857.128.26.3810.056.723.25.318.457.618.24.316.857.813.23.345.360.08.22.374.069.63.21.312.7103.11:,,s5%,100%,,2,Á130,:127mm,6römin,4LmQ235,113117HBSL2AN10,2:Lm;WEx;WTh;EE=[(WEx-WTh)öWEx]100%.2sö%LmWExökNWThökNEö%84.60.1227.625.719.37.430.11415.40.1039.141.535.96.18.21624.40.1070.857.949.918.229.52:1),;2)31),,2)3),(References)[1].()[M].:,1980.ZHAOZhiye.TheoryofMetalPlasticDeformationandRolling(2ndEd)[M].Beijing:MetallurgicalIndustryPress,1980.(inChinese)[2]WilsonWRD,SheuS.Realareaofcontactandboundaryfrictioninmetalforming[J].JMechSci,1988,30(7):475489.[3]SheuS,WilsonWRD.Mixedlubricationofstriprolling[J].TransTribology,1994,37(3):483493.[4]ChangDF,MarsaultN,WilsonWRD.Lubricationofstriprollinginthelow2speedmixedregime[J].TransTribology,1996,39(2):407415.[5]WangZ,DohdaK.Outflowbehavioroflubricantinmicropitsinthemetalforming[A].Proc1stInternationalConferenceonTribologyinManufacturingProcesses[C].Gifu,1997.[6]AndersonS,Salas2RussoE.Theinfluenceofsurfaceroughnessandoilviscosityonthetransitioninmixedlubricatedslidingsteelcontacts[J].Wear,1994,174:7179.[7].[M].:,1996.FUZuobao.ProductionofColdRollingSteelSheets[M].Beijing:MetallurgicalIndustryPress,1996.(inChinese)[8],,,.[M].:,1981.LIXiaoyu,GUZhengqiu,LUODonglin,etal.LubricationofRollingProcess[M].Beijing:MetallurgicalIndustryPress,1981.(inChinese)726,: