欢迎来到天天文库
浏览记录
ID:37074462
大小:14.04 MB
页数:62页
时间:2019-05-16
《高强度钢热成型模具冷却水道的设计及传热效果研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、10532S150200218U4662018051010532S1502002182018051020180519StudyontheDesignofCoolingChannelsandHeatTransferEffectofHighStrengthSteelHotFormingMouldbyWanYuxianB.E.(NortheasternUniversity)2015AthesissubmittedinpartialsatisfactionoftheRequirementsforthedegreeofMasterofEngineeringinMechanica
2、lEngineeringintheGraduateSchoolofHunanUniversityProfessorLIUDihuiMay,20181______2I22MnB5FluentLS-DYNAFluent22MnB5IIAbstractWiththerapiddevelopmentoftheautomobileindustry,thecost,safetyperformanceandlightweightoftheautomobilehavebeenpaidgreatattention.Highstrengthsteelhasbeenwidelyusedin
3、thefieldofautopartstoimprovetheperformanceofautomobile.Becauseofthehighyieldstrengthandtensilestrengthofhighstrengthsteel,thestiffnessofthecarisgreatlyimproved.Theincreaseofstrengthcanreducetheuseofthestiffenersonthebody.Theweightofthebodyandthenumberofweldingpointsoftheweldedreinforcem
4、entaredecreasedeffectivelysoastosavethecost.Mostautomotivepartsarestampingforming,buthighstrengthsteelcan'tmeettherequirementbyordinarycoldstamping.Therefore,hotstampingisrequiredtoproducerelatedautomotivecomponents.Inthispaper,theautomobileupperbeamproducedbyhotformingnamed22MnB5high-s
5、trengthsteelistakenastheresearchobject.Thecoolingsystemofthehotformingmoldandthetemperaturechangeofthesheetduringstampingarestudied.Themaintasksareasfollows:Anewmethodisproposedtouniformtheflowrateofthethermoformingcoolingsystemtoensurethatthecoolingoftheplateisuniform.Theconcretemethod
6、istooffsetconnectingpipesofmainchanneltocontroltheflowrateofsurfacepipesandselectthebestoptimizationparametersbyorthogonaltest.Fluentisusedtoanalyzetheflowrateofthecoolingsystembeforeandafteroptimization,andthecorrespondingcoolingsystemexperimentalplatformissetup.Theresultsofsimulationa
7、ndexperimentarecomparedtoverifythefeasibilityofthemethod.Theflowandsolidheatcouplinganalysisofthemodelbeforeandaftertheoptimizationwascarriedouttoobservethetemperaturedistributionofthesheetmaterialbeforeandafterthevelocityhomogenization.Thehotstampingformingexperimentoftheupper
此文档下载收益归作者所有