强化金属材料强化系数对矫直机辊缝设定的影响分析

:2007-12-11;:2008-01-02:(1965-),,,,,,,(,201900):,OS(Overstrechfac2tor)P(rateofplastification),,OS7,85%,:,,;0101,,,,,0101,,,,:;;;;;:33312+3:A:1001-196X(2008)01-0026-04TheanalysisoftheinfluenceonthelevelerrollergappresetwiththestrengthenfactorSUNDa2le,WANGXue2min,FANQun,YAOLi2song(EquipmentResearchInstitute,BaosteelIron&SteelCo1,Ltd.,Shanghai201900,China)Abstract:Thepaperintroducedthebasictheoryandconceptofelastic-plasticdeformationofmetalmaterial;establishedthecorrespondingrelationbetweentheoverstretchfactorandtheplastic-arearatio;pointedoutthatitwasreasonablethatthemaximumvalueofOSwas7,whichmeansthattheplastic-arearatioofmentalmateri2alis85%;simulatedandanalyzedtheeffectonrollergappresetwithstrengthenfactor.Theresultshowedthatthelargerthestrengtheningfactoris,thelargerthequantitywillpushdown.Butwhenthestrengtheningfactorissmallerthan0101,thequantityaddedwillbeinfinitesimalifcomparedtotheidealmental.Soitcouldhaveaproximatetreatmentastheidealmentalmaterial.Accordingtothecurrentproductoutlineofsomemills,thestrengtheningfactorofmentalmaterialisnormallynotbeyond0101.Soinordertosimplifythecalculation,strengtheningfactorcanbeomittedasittakesverysmalleffectonthelevelingeffectofstrip.Keywords:levelermodel;rollergappreset;residualstress;strengthenfactor;bendingcurvature;over2stretchfactor1,,,,,,,622008No11©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(MHI),,[1][4],,,,,,,22111-,,,,,,,,=EE,E,E1-212(1),,=Ht/H,[0,1],Ht,H,22OS(2)P(rateofplastification),P=1-,P[0,1](3)…C,CCt,…C=C/Ct,()[1]Ct=MtEI=tEIBH26=2tEH,Mt,I,B,tCC=2tEHt…C…C=CCt=HHt(4)OS,maxt,2,OSt/E-t/EOSt/E=H-HtHOS=HHt,OS…C722008No11©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.=1OS=1…C[0,1],OS[1,],3OS,,OS,OS13,;OS7,,57,OS7,85%3OS213,[3]ydA=M,dA;;y,M,,ŠM=115-015OS2(1),ŠM,ŠM=MMt,ŠM=(1-1)(1-015-0152)+115-0152(2),;,=1/OS214-[3]x=Cxxdx+Cxxdx=OSxCtxdx+OSxCtxdx(3),Cx=OSxCt=MxEI,=0,Cx=OSxCt=Ct015115-MxMt;,ŠM=(OS-1)(1-015OS-015OS2)+115-015OS2,OS(3),,,()3MARC9240mm,225mm,1900mm211e5MPa,,=0()=0101=011,410MPa,=0101=01144822008No11©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(5)5,20mm10mm5mm,6,,,;,=0101,,,,=011,6(a)H=20mm(b)H=10mm(c)H=5mm4(1)OS,OS,,()57,OS7,85%(2),:,,,:[1].[M].:,1994.[2].[Z].,2000:27-30.[3]S1,J1,.[M].:,1978.[4],,.[J].(),2005,26(5):460-462.[5].[J].,1971,12(129):768-775.[6],,.ÍyÉA[J].,2002,43(496):79-83.[7]KCPark,SMHwang.Developmentofafiniteele2mentanalysisprogramforrollerlevelingandapplicationforremovingblankingbowdefectsofthinsteelsheet[J].ISIJInternational,2002,42(9):990-999.:488,125MN,,1000340mm600mm,60m922008No11©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.