外文翻译材料制备机械设计理论中的新趋势和新问题.doc外文翻译材料制备机械设计理论中的新趋势和新问题.doc

收藏 分享

资源预览需要最新版本的Flash Player支持。
您尚未安装或版本过低,建议您

攀枝花学院毕业设计(论文)57英文原文NEWTRENDSANDPROBLEMSINMATERIALPROCESSINGMACHINEDESIGNTHEORYWANGAILUN,DUANJIAN,HUANGMINGHUI,ZHONGJUECOLLEGEOFMECHANICALELECTRONICENGINEERING,CENTRALSOUTHUNIVERSITY,CHANGSHA410083,HUNANCHINAABSTRACTBASEDONREVIEWINGTHEHISTORICALBACKGROUND,PROSPECTINGFORTHEDEVELOPMENTTREND,ANALYZINGTHECOMPLICACYANDMECHANISMANDSUMMINGUPSOMEACHIEVEMENTSANDEXPERIENCESINSCIENTIFICRESEARCH,SEVERALNEWPROBLEMSANDTHEPOSSIBLEDIRECTIONOFDEVELOPMENTINMATERIALPROCESSINGTECHNOLOGYANDMACHINEAREPROPOSED,SUCHAS,PRODUCINGNEWCONCEPTMATERIALSPOSSESSINGSOMESPECIFICANDEXTRAOVDINARYPROPERTIESBYMEANSOFINTEGRATINGANDCOALESCINGCONELATIVEFRONTIERSCIENCEANDTECHNOLOGY;ANDTHEREAFTERABRIEFDISCUSSIONISGIVENKEYWORDSINTERFACE;EXTRAORDINARYPHYSICALFIELD;PROCESSIONMACHINE;FUNCTIONMATERIAL1THETIMEBACKGROUNDOFMATERIALPROCESSINGMACHINEINTHELONGSPANOFHISTORYOFHUMANPROGRESS,MANYTOOLS,MACHINESANDMETHODSWERECREATEDANDAVARIETYOFMATERIALSWITHDIFFERENTPROPERTIESWEREPROCESSEDMATERIALSANDITSPROCESSINGHAVEBECOMEONEOFPILLARANDDRIVINGFORCEOFMANKINDPROGRESSINPACEWITHMULTIPOLARCOMPETITIONINCURRENTWORLDANDPEOPLE’SSTRIVINGPERSEVERINGLYFORHAPPIERLIFE,MATERIALFUNCTIONGOESBEYONDUNCEASINGLYMEN’SKNOWLEDGEANDIMAGINATION,FOREXAMPLE,CRYPTICFUNCTIONMATERIAL,SEMICONDUCTORMATERIAL,ENERGYMATERIAL,VIBRATIONABSORPTIVEMATERIAL,SUPERSTRENGTH攀枝花学院毕业设计(论文)58ALUMINUMALLOYACCOUNTINGFOR70PERCENTOFAPPLICATIONOFAERONAUTICSANDSPACE,METALFOILOF4~5M,DEEPDRAWINGPLATEWITHANISOTROPYBELOW1PERCENT,ELECTRONICALUMINUMFOILWITHMICROORIENTATIONUPTO95PERCENT,HEATRESISTINGALUMINUMALLOYWITHSUPERSTRONGSPECIFICSTRENGTHUSEDINAERONAUTICS,SPACEANDDEEPSEA,ETC1,2THUSSEVERALIMPORTANTDEVELOPMENTTRENDSWITHDISTINCTTIMEFEATURESINMATERIALPROCESSINGDOMAINARESHAPEDUPASFOLLOWS1CREATINGMATERIALPROCESSINGMACHINEWITHEXTRAORDINARYPHYSICALFIELDFORPROCESSINGMATERIALWITHSPECIALTEXTURESTRUCTURESANDFUNCTIONSFOREXAMPLE,APPLICATIONSOFTHERMALENERGYANDMECHANICALENERGYAREBREAKINGTHROUGHUNCEASINGLYTECHNOLOGYLIMIT,ANDSOMENONTRADITIONENERGY,SUCHASMICROWAVE,CHEMICALENERGY,BIOENERGY,ETC,AREINTRODUCEDINTOMATERIALPROCESSINGPROCEDUREONEAFTERANOTHER,SOTHATSOMEMATERIALPROCESSINGMACHINESWITHEXTRAORDINARYENERGYCIRCUMSTANCEAREPRODUCED2BREAKINGTHROUGHTRADITIONALPHYSICALLIMITSANDINTEGRATINGMELTING,SOLIDIFYING,PLASTICDEFORMATIONANDHEATTREATMENTTOOBTAINSPECIALFUNCTIONOFMATERIALANDCUTDOWNEXPENSES3FOREXAMPLE,NEARNETSHAPINGMATERIALPROCESSINGTECHNOLOGY,SUCHASFASTROLLING,SPRAYINGDEPOSITION,OVERPLASTICMOLDING,INJECTIONMOLDING,HIGHENERGYBEAM,ETC,ISAPPLIED3MATERIALPROCESSINGPROCESSISFORGEDAHEADINTHEDIRECTIONOFHIGHSPEED,HEAVYDUTYANDHIGHACCURACYONLINECONTROL,FORINSTANCE,THEROLLINGSPEEDGOESUPTO130MS1,THEDEFORMATIONPRESSURERISESUPTO300MPA,ACCURACYOFDIMENSIONUPTO01ΜM,ACCURACYOFSHAPEUPTO01I,STRENGTHACCURACYCOMESUPTO01MPAFORTHESEREASONS,ITISNECESSARYFORMATERIALPROCESSINGMACHINEDESIGNTHEORYTOINTEGRATEANDCOALESCEINGENIOUSLYCORRELATIVEFRONTIERSCIENCEANDTECHNOLOGYTOCREATEANDPRODUCESOMENEWCONCEPTMATERIALPROCESSINGMACHINEWITHFOLLOWINGFUNCTIONS2DUEFUNCTIONSOFNEWCONCEPTMATERIALPROCESSINGMACHINE1TOHAVETHEABILITYTOPRODUCEANDBEAREXTRAORDINARYPHYSICAL攀枝花学院毕业设计(论文)59FIELDANDTRANSMITEXTRAORDINARYENERGYFLOWWITHTHEAIMOFPROVIDINGEXTRAORDINARYPHYSICALCIRCUMSTANCESNECESSARYFORNEWCONCEPTMATERIALPROCESSINGFOREXAMPLE,HIGHGRADIENTTEMPERATUREFIELDWITHTHESPEEDOFCOOLDOWNOFWORKINTERFACEWHICHEXCEEDS104~106KS1,LINEWAVEANDPULSECOMPLEXEXERTEDINSOLIDIFYINGDEFORMINGAREA,SUPERSTRENGTHCONTACTSTRESSFIELDOFMATERIALFORMINGINTERFACE,TURBULENTFLOWFIELDOFMOLTENMETALWITHVERYBIGFLAKINESSRATIO,LOWFREQUENCYMAGNETICFIELDWITHRANDOMFREQUENCY,MICROWAVEFIELDFORPOWDERMETALHEATING,ULTRASONICFIELDFORLARGEVOLUMESOLIDIFYING,ETC4,AREAPPLIED2TOHAVETHEABILITYTOWORKINCRITICALSTATESOTHATHIGHSTABILITYANDIDEALPERFORMANCEOFPROCESSINGMACHINEISENSUREDUNDERTHECIRCUMSTANCEOFREINFORCEDTECHNOLOGICALCONDITIONANDMULTIFIELDCOUPLINGOPERATIONFOREXAMPLE,CHATTERSUPPRESSINGCAPABILITYOFFASTULTRATHINROLLINGUNDERTHECONDITIONOFBOUNDARYLUBRICATINGSTATE5,THECAPABILITYOFSELFEXCITEDVIBRATIONSUPPRESSINGUNDERTHECONDITIONOFSPECIALFRICTIONSTATE,SYNERGISMSTABILITYANDDISTURBANCESTABILITYOFFLEXIBLECONNECTINGPARALLELSHAFTWITHMULTIDRIVINGSYSTEM,ETC4,AREENSURED3TOHAVETHEABILITYTOACCURATELYCONTROLTHEMATERIALPROCESSINGINORDERTOOBTAINLOWLOSS,HIGHEFFICIENCYANDHIGHQUALITYOFMATERIALPROCESSINGFOREXAMPLE,SUPERHIGHACCURACYONLINEMONITOROFPRODUCTSFORM,ON–LINEMONITORANDONLINEADJUSTMENTOFPRODUCTSTEXTUREANDPROPERTIES,PRECISIONCOORDINATIONCONTROLOFMULTIPROCEDURE,ONLINEMONITOROFMICROORIENTATIONOFMETALPLASTICDEFORMATION,ETC4,AREENSUREDSOMEPRODUCTSACCURACYINDEXMAYBEENUMERATEDASFOLLOWSDIMENSIONALACCURACYCOMINGTO01ΜM,MICROSTRUCTUREUNIFORMITYTOCRYSTALLATTICE,STRENGTHERRORTO01MPA,ETC4INSHORT,ONLYBYNEWCONCEPTMATERIALPROCESSINGMACHINEWITHEXTRAORDINARYFUNCTIONBEINGDESIGNEDANDMADE,CANSPECIALFUNCTIONMATERIALBEPROCESSED攀枝花学院毕业设计(论文)603SCIENCEPROBLEMSANDSTUDYCONTENTSOFMETALMATERIALPROCESSINGMACHINEUNDERTHECIRCUMSTANCEOFEXTRAORDINARYPHYSICALFIELDINVIEWOFTHESEFACTSANDBACKGROUNDMENTIONEDABOVE,SEVERALNEWRESEARCHTOPICSCANBEADVANCEDASFOLLOWS31COUPLINGHEATTRANSFERMECHANISMOFMULTIPHASEINTERFACETEMPERATURESTRESSFIELDABRANDNEWMICROSTRUCTURECANBEOBTAINEDTHROUGHCONTINUOUSLYLARGEDEFORMATIONANDFASTSOLIDIFYINGWHENMELTINGMETALISINCRITICALSTATEOFLIQUIDSOLIDATTHISVERYMOMENT,HIGHDENSITYHEATFLOWANDDYNAMICHEATRESISTANCEAREPRESENTINMATERIALPROCESSINGCIRCUMSTANCE6,7ABASICTHEORYPROBLEMOFDESIGNINGTHISKINDOFMACHINEISTOSTUDYMECHANISMOFHEATTRANSMITTANCEANDENERGYCONVERSION,ANDTOESTABLISHMATHEMATICALMODEL32FRICTIONCONSTRAINTMECHANISMOFPLASTICFLOWINTERFACEOFMATERIALPROCESSINGMACHINETHECOUPLINGBETWEENOPERATIONMECHANISMANDWORKPIECEISVERYCOMPLICATEDBECAUSEPLASTICFLOWISPRESENTINPROCESSINGINTERFACETHEINTERFACESTATE,DETERMINEDBYVELOCITY,LOADTHERMODYNAMICPROCESS,ELASTICITYOFOPERATIONMECHANISM,PLASTICITYOFWORKPIECE,DYNAMICBEHAVIOUROFINTERFACESTICKINGSLIDINGANDPARTIALHYDRODYNAMICLUBRICATION,ETC,AFFECTANDFORMFRICTIONCONSTRAINTSMECHANISMPECULIARTOMATERIALPROCESSINGMACHINE,BECAUSETHESECONSTRAINTSPRESENTSTRONGNONLINEARITY;ANDUNDERCERTAINCIRCUMSTANCES,THECONSTRAINTSMAYBEDESTROYEDORMISMATCHEDINSTANTANEOUSLYANDTHUSDYNAMICINSTABILITYISRESULTEDINTHUSFOLLOWINGPROBLEMSCANBEPUTFORWARDMECHANISMOF“SPECTRECHATTER”AROSEFROMSTICKINGSLIDINGFRICTIONANDPARTIALHYDRODYNAMICLUBRICATIONINROLLINGINTERFACE,INSTABILITYCONDITIONANDMECHANISMOFCONSTRAINTBETWEENSMOOTHSURFACEANDROTATINGBODYUNDERTHECIRCUMSTANCEOFHIGHSPEED,HEAVYDUTYANDBOUNDARYLUBRICATION,LUBRICATIONFILMABSORPTIONMECHANISMANDPHYSICALCHEMISTRYBEHAVIOUR
编号:201311171426306558    类型:共享资源    大小:58.50KB    格式:DOC    上传时间:2013-11-17
  
5
关 键 词:
专业文献 学术论文 精品文档 外文翻译
  人人文库网所有资源均是用户自行上传分享,仅供网友学习交流,未经上传用户书面授权,请勿作他用。
关于本文
本文标题:外文翻译材料制备机械设计理论中的新趋势和新问题.doc
链接地址:http://www.renrendoc.com/p-96558.html

当前资源信息

4.0
 
(2人评价)
浏览:9次
淘宝运营上传于2013-11-17

官方联系方式

客服手机:17625900360   
2:不支持迅雷下载,请使用浏览器下载   
3:不支持QQ浏览器下载,请用其他浏览器   
4:下载后的文档和图纸-无水印   
5:文档经过压缩,下载后原文更清晰   

精品推荐

相关阅读

人人文库
关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服客服 - 联系我们

网站客服QQ:2846424093    人人文库上传用户QQ群:460291265   

[email protected] 2016-2018  renrendoc.com 网站版权所有   南天在线技术支持

经营许可证编号:苏ICP备12009002号-5