外文翻译--注塑模具自动装配造型 英文版.pdf外文翻译--注塑模具自动装配造型 英文版.pdf

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

INTJADVMANUFTECHNOL200016739–7472000SPRINGERVERLAGLONDONLIMITEDAUTOMATEDASSEMBLYMODELLINGFORPLASTICINJECTIONMOULDSXGYE,JYHFUHANDKSLEEDEPARTMENTOFMECHANICALANDPRODUCTIONENGINEERING,NATIONALUNIVERSITYOFSINGAPORE,SINGAPOREANINJECTIONMOULDISAMECHANICALASSEMBLYTHATCONSISTSOFPRODUCTDEPENDENTPARTSANDPRODUCTINDEPENDENTPARTSTHISPAPERADDRESSESTHETWOKEYISSUESOFASSEMBLYMODELLINGFORINJECTIONMOULDS,NAMELY,REPRESENTINGANINJECTIONMOULDASSEMBLYINACOMPUTERANDDETERMININGTHEPOSITIONANDORIENTATIONOFAPRODUCTINDEPENDENTPARTINANASSEMBLYAFEATUREBASEDANDOBJECTORIENTEDREPRESENTATIONISPROPOSEDTOREPRESENTTHEHIERARCHICALASSEMBLYOFINJECTIONMOULDSTHISREPRESENTATIONREQUIRESANDPERMITSADESIGNERTOTHINKBEYONDTHEMERESHAPEOFAPARTANDSTATEEXPLICITLYWHATPORTIONSOFAPARTAREIMPORTANTANDWHYTHUS,ITPROVIDESANOPPORTUNITYFORDESIGNERSTODESIGNFORASSEMBLYDFAASIMPLIFIEDSYMBOLICGEOMETRICAPPROACHISALSOPRESENTEDTOINFERTHECONFIGURATIONSOFASSEMBLYOBJECTSINANASSEMBLYACCORDINGTOTHEMATINGCONDITIONSBASEDONTHEPROPOSEDREPRESENTATIONANDTHESIMPLIFIEDSYMBOLICGEOMETRICAPPROACH,AUTOMATICASSEMBLYMODELLINGISFURTHERDISCUSSEDKEYWORDSASSEMBLYMODELLING;FEATUREBASED;INJECTIONMOULDS;OBJECTORIENTED1INTRODUCTIONINJECTIONMOULDINGISTHEMOSTIMPORTANTPROCESSFORMANUFACTURINGPLASTICMOULDEDPRODUCTSTHENECESSARYEQUIPMENTCONSISTSOFTWOMAINELEMENTS,THEINJECTIONMOULDINGMACHINEANDTHEINJECTIONMOULDTHEINJECTIONMOULDINGMACHINESUSEDTODAYARESOCALLEDUNIVERSALMACHINES,ONTOWHICHVARIOUSMOULDSFORPLASTICPARTSWITHDIFFERENTGEOMETRIESCANBEMOUNTED,WITHINCERTAINDIMENSIONLIMITS,BUTTHEINJECTIONMOULDDESIGNHASTOCHANGEWITHPLASTICPRODUCTSFORDIFFERENTMOULDINGGEOMETRIES,DIFFERENTMOULDCONFIGURATIONSAREUSUALLYNECESSARYTHEPRIMARYTASKOFANINJECTIONMOULDISTOSHAPETHEMOLTENMATERIALINTOTHEFINALSHAPEOFTHEPLASTICPRODUCTTHISTASKISFULFILLEDBYTHECAVITYSYSTEMTHATCONSISTSOFCORE,CAVITY,INSERTS,ANDSLIDER/LIFTERHEADSTHEGEOMETRICALSHAPESCORRESPONDENCEANDOFFPRINTREQUESTSTODRJERRYYHFUH,DEPARTMENTOFMECHANICALANDPRODUCTIONENGINEERING,NATIONALUNIVERSITYOFSINGAPORENUS,10KENTRIDGECRESCENT,SINGAPORE119260EMAILMPEFUHYHKNUSEDUSGANDSIZESOFACAVITYSYSTEMAREDETERMINEDDIRECTLYBYTHEPLASTICMOULDEDPRODUCT,SOALLCOMPONENTSOFACAVITYSYSTEMARECALLEDPRODUCTDEPENDENTPARTSHEREINAFTER,PRODUCTREFERSTOAPLASTICMOULDEDPRODUCT,PARTREFERSTOTHECOMPONENTOFANINJECTIONMOULDBESIDESTHEPRIMARYTASKOFSHAPINGTHEPRODUCT,ANINJECTIONMOULDHASALSOTOFULFILANUMBEROFTASKSSUCHASTHEDISTRIBUTIONOFMELT,COOLINGTHEMOLTENMATERIAL,EJECTIONOFTHEMOULDEDPRODUCT,TRANSMITTINGMOTION,GUIDING,ANDALIGNINGTHEMOULDHALVESTHEFUNCTIONALPARTSTOFULFILTHESETASKSAREUSUALLYSIMILARINSTRUCTUREANDGEOMETRICALSHAPEFORDIFFERENTINJECTIONMOULDSTHEIRSTRUCTURESANDGEOMETRICALSHAPESAREINDEPENDENTOFTHEPLASTICMOULDEDPRODUCTS,BUTTHEIRSIZESCANBECHANGEDACCORDINGTOTHEPLASTICPRODUCTSTHEREFORE,ITCANBECONCLUDEDTHATANINJECTIONMOULDISACTUALLYAMECHANICALASSEMBLYTHATCONSISTSOFPRODUCTDEPENDENTPARTSANDPRODUCTINDEPENDENTPARTSFIGURE1SHOWSTHEASSEMBLYSTRUCTUREOFANINJECTIONMOULDTHEDESIGNOFAPRODUCTDEPENDENTPARTISBASEDONEXTRACTINGTHEGEOMETRYFROMTHEPLASTICPRODUCTINRECENTYEARS,CAD/CAMTECHNOLOGYHASBEENSUCCESSFULLYUSEDTOHELPMOULDDESIGNERSTODESIGNTHEPRODUCTDEPENDENTPARTSTHEMOULDMOULDBASECOOLFILLLAYOUTPLUGSOCKETCAV_1CAV_2CAPLATEGUILDBUSHTCPPLATEBEPPLATECBPLATEEAPLATEEBPLATEGUIDPINIPPLATERETPINSLIDERBODYGUIDESTOPBLKHEELBLKHEADCORECAVITYPRODUCTINDEPENDENTPARTPRODUCTDEPENDENTPARTMOVEHALFFIXEDHALFFIG1ASSEMBLYSTRUCTUREOFANINJECTIONMOULD740XGYEETALAUTOMATICGENERATIONOFTHEGEOMETRICALSHAPEFORAPRODUCTDEPENDENTPARTFROMTHEPLASTICPRODUCTHASALSOATTRACTEDALOTOFRESEARCHINTEREST1,2HOWEVER,LITTLEWORKHASBEENCARRIEDOUTONTHEASSEMBLYMODELLINGOFINJECTIONMOULDS,ALTHOUGHITISASIMPORTANTASTHEDESIGNOFPRODUCTDEPENDENTPARTSTHEMOULDINDUSTRYISFACINGTHEFOLLOWINGTWODIFFICULTIESWHENUSEACADSYSTEMTODESIGNPRODUCTINDEPENDENTPARTSANDTHEWHOLEASSEMBLYOFANINJECTIONMOULDFIRST,THEREAREUSUALLYAROUNDONEHUNDREDPRODUCTINDEPENDENTPARTSINAMOULDSET,ANDTHESEPARTSAREASSOCIATEDWITHEACHOTHERWITHDIFFERENTKINDSOFCONSTRAINTSITISTIMECONSUMINGFORTHEDESIGNERTOORIENTANDPOSITIONTHECOMPONENTSINANASSEMBLYSECONDLY,WHILEMOULDDESIGNERS,MOSTOFTHETIME,THINKONTHELEVELOFREALWORLDOBJECTS,SUCHASSCREWS,PLATES,ANDPINS,THECADSYSTEMUSESATOTALLYDIFFERENTLEVELOFGEOMETRICALOBJECTSASARESULT,HIGHLEVELOBJECTORIENTEDIDEASHAVETOBETRANSLATEDTOLOWLEVELCADENTITIESSUCHASLINES,SURFACES,ORSOLIDSTHEREFORE,ITISNECESSARYTODEVELOPANAUTOMATICASSEMBLYMODELLINGSYSTEMFORINJECTIONMOULDSTOSOLVETHESETWOPROBLEMSINTHISPAPER,WEADDRESSTHEFOLLOWINGTWOKEYISSUESFORAUTOMATICASSEMBLYMODELLINGREPRESENTINGAPRODUCTINDEPENDENTPARTANDAMOULDASSEMBLYINACOMPUTER;ANDDETERMININGTHEPOSITIONANDORIENTATIONOFACOMPONENTPARTINANASSEMBLYTHISPAPERGIVESABRIEFREVIEWOFRELATEDRESEARCHINASSEMBLYMODELLING,ANDPRESENTSANINTEGRATEDREPRESENTATIONFORTHEINJECTIONMOULDASSEMBLYASIMPLIFIEDGEOMETRICSYMBOLICMETHODISPROPOSEDTODETERMINETHEPOSITIONANDORIENTATIONOFAPARTINTHEMOULDASSEMBLYANEXAMPLEOFAUTOMATICASSEMBLYMODELLINGOFANINJECTIONMOULDISILLUSTRATED2RELATEDRESEARCHASSEMBLYMODELLINGHASBEENTHESUBJECTOFRESEARCHINDIVERSEFIELDS,SUCHAS,KINEMATICS,AI,ANDGEOMETRICMODELLINGLIBARDIETAL3COMPILEDARESEARCHREVIEWOFASSEMBLYMODELLINGTHEYREPORTEDTHATMANYRESEARCHERSHADUSEDGRAPHSTRUCTURESTOMODELASSEMBLYTOPOLOGYINTHISGRAPHSCHEME,THECOMPONENTSAREREPRESENTEDBYNODES,ANDTRANSFORMATIONMATRICESAREATTACHEDTOARCSHOWEVER,THETRANSFORMATIONMATRICESARENOTCOUPLEDTOGETHER,WHICHSERIOUSLYAFFECTSTHETRANSFORMATIONPROCEDURE,IEIFASUBASSEMBLYISMOVED,ALLITSCONSTITUENTPARTSDONOTMOVECORRESPONDINGLYLEEANDGOSSARD4DEVELOPEDASYSTEMTHATSUPPORTEDAHIERARCHICALASSEMBLYDATASTRUCTURECONTAININGMOREBASICINFORMATIONABOUTASSEMBLIESSUCHAS“MATINGFEATURE”BETWEENTHECOMPONENTSTHETRANSFORMATIONMATRICESAREDERIVEDAUTOMATICALLYFROMTHEASSOCIATIONSOFVIRTUALLINKS,BUTTHISHIERARCHICALTOPOLOGYMODELREPRESENTSONLY“PARTOF”RELATIONSEFFECTIVELYAUTOMATICALLYINFERRINGTHECONFIGURATIONOFCOMPONENTSINANASSEMBLYMEANSTHATDESIGNERSCANAVOIDSPECIFYINGTHETRANSFORMATIONMATRICESDIRECTLYMOREOVER,THEPOSITIONOFACOMPONENTWILLCHANGEWHENEVERTHESIZEANDPOSITIONOFITSREFERENCECOMPONENTAREMODIFIEDTHEREEXISTTHREETECHNIQUESTOINFERTHEPOSITIONANDORIENTATIONOFACOMPONENTINTHEASSEMBLYITERATIVENUMERICALTECHNIQUE,SYMBOLICALGEBRAICTECHNIQUE,ANDSYMBOLICGEOMETRICTECHNIQUELEEANDGOSSARD5PROPOSEDANITERATIVENUMERICALTECHNIQUETOCOMPUTETHELOCATIONANDORIENTATIONOFEACHCOMPONENTFROMTHESPATIALRELATIONSHIPSTHEIRMETHODCONSISTSOFTHREESTEPSGENERATIONOFTHECONSTRAINTEQUATIONS,REDUCINGTHENUMBEROFEQUATIONS,ANDSOLVINGTHEEQUATIONSTHEREARE16EQUATIONSFOR“AGAINST”CONDITION,18EQUATIONSFOR“FIT”CONDITION,6PROPERTYEQUATIONSFOREACHMATRIX,AND2ADDITIONALEQUATIONSFORAROTATIONALPARTUSUALLYTHENUMBEROFEQUATIONSEXCEEDSTHENUMBEROFVARIABLES,SOAMETHODMUSTBEDEVISEDTOREMOVETHEREDUNDANTEQUATIONSTHENEWTON–RAPHSONITERATIONALGORITHMISUSEDTOSOLVETHEEQUATIONSTHISTECHNIQUEHASTWODISADVANTAGESFIRST,THESOLUTIONISHEAVILYDEPENDENTONTHEINITIALSOLUTION;SECONDLY,THEITERATIVENUMERICALTECHNIQUECANNOTDISTINGUISHBETWEENDIFFERENTROOTSINTHESOLUTIONSPACETHEREFORE,ITISPOSSIBLE,INAPURELYSPATIALRELATIONSHIPPROBLEM,THATAMATHEMATICALLYVALID,BUTPHYSICALLYUNFEASIBLE,SOLUTIONCANBEOBTAINEDAMBLERANDPOPPLESTONE6SUGGESTEDAMETHODOFCOMPUTINGTHEREQUIREDROTATIONANDTRANSLATIONFOREACHCOMPONENTTOSATISFYTHESPATIALRELATIONSHIPSBETWEENTHECOMPONENTSINANASSEMBLYSIXVARIABLESTHREETRANSLATIONSANDTHREEROTATIONSFOREACHCOMPONENTARESOLVEDTOBECONSISTENTWITHTHESPATIALRELATIONSHIPSTHISMETHODREQUIRESAVASTAMOUNTOFPROGRAMMINGANDCOMPUTATIONTOREWRITERELATEDEQUATIONSINASOLVABLEFORMATALSO,ITDOESNOTGUARANTEEASOLUTIONEVERYTIME,ESPECIALLYWHENTHEEQUATIONCANNOTBEREWRITTENINSOLVABLEFORMSKRAMER7DEVELOPEDASYMBOLICGEOMETRICAPPROACHFORDETERMININGTHEPOSITIONSANDORIENTATIONSOFRIGIDBODIESTHATSATISFYASETOFGEOMETRICCONSTRAINTSREASONINGABOUTTHEGEOMETRICBODIESISPERFORMEDSYMBOLICALLYBYGENERATINGASEQUENCEOFACTIONSTOSATISFYEACHCONSTRAINTINCREMENTALLY,WHICHRESULTSINTHEREDUCTIONOFTHEOBJECT’SAVAILABLEDEGREESOFFREEDOMDOFTHEFUNDAMENTALREFERENCEENTITYUSEDBYKRAMERISCALLEDA“MARKER”,THATISAPOINTANDTWOORTHOGONALAXESSEVENCONSTRAINTSCOINCIDENT,INLINE,INPLANE,PARALLELFZ,OFFSETFZ,OFFSETFXANDHELICALBETWEENMARKERSAREDEFINEDFORAPROBLEMINVOLVINGASINGLEOBJECTANDCONSTRAINTSBETWEENMARKERSONTHATBODY,ANDMARKERSWHICHHAVEINVARIANTATTRIBUTES,ACTIONANALYSIS7ISUSEDTOOBTAINASOLUTIONACTIONANALYSISDECIDESTHEFINALCONFIGURATIONOFAGEOMETRICOBJECT,STEPBYSTEPATEACHSTEPINSOLVINGTHEOBJECTCONFIGURATION,DEGREESOFFREEDOMANALYSISDECIDESWHATACTIONWILLSATISFYONEOFTHEBODY’SASYETUNSATISFIEDCONSTRAINTS,GIVENTHEAVAILABLEDEGREESOFFREEDOMITTHENCALCULATESHOWTHATACTIONFURTHERREDUCESTHEBODY’SDEGREESOFFREEDOMATTHEENDOFEACHSTEP,ONEAPPROPRIATEACTIONISADDEDTOTHEMETAPHORICALASSEMBLYPLANACCORDINGTOSHAHANDROGERS8,KRAMER’SWORKREPRESENTSTHEMOSTSIGNIFICANTDEVELOPMENTFORASSEMBLYMODELLINGTHISSYMBOLICGEOMETRICAPPROACHCANLOCATEALLSOLUTIONSTOCONSTRAINTCONDITIONS,ANDISCOMPUTATIONALLYATTRACTIVECOMPAREDTOANITERATIVETECHNIQUE,BUTTOIMPLEMENTTHISMETHOD,ALARGEAMOUNTOFPROGRAMMINGISREQUIREDALTHOUGHMANYRESEARCHERSHAVEBEENACTIVELYINVOLVEDINASSEMBLYMODELLING,LITTLELITERATUREHASBEENREPORTEDONFEATUREBASEDASSEMBLYMODELLINGFORINJECTIONMOULDDESIGNKRUTHETAL9DEVELOPEDADESIGNSUPPORTSYSTEMFORANINJECTIONMOULDTHEIRSYSTEMSUPPORTEDTHEASSEMBLYDESIGNFORINJECTIONMOULDSTHROUGHHIGHLEVELFUNCTIONALMOULDOBJECTSCOMPONENTSANDFEATURESBECAUSETHEIRSYSTEMWASAUTOMATEDASSEMBLYMODELLING741BASEDONAUTOCAD,ITCOULDONLYACCOMMODATEWIREFRAMEANDSIMPLESOLIDMODELS3REPRESENTATIONOFINJECTIONMOULDASSEMBLIESTHETWOKEYISSUESOFAUTOMATEDASSEMBLYMODELLINGFORINJECTIONMOULDSARE,REPRESENTINGAMOULDASSEMBLYINCOMPUTERS,ANDDETERMININGTHEPOSITIONANDORIENTATIONOFAPRODUCTINDEPENDENTPARTINTHEASSEMBLYINTHISSECTION,WEPRESENTANOBJECTORIENTEDANDFEATUREBASEDREPRESENTATIONFORASSEMBLIESOFINJECTIONMOULDSTHEREPRESENTATIONOFASSEMBLIESINACOMPUTERINVOLVESSTRUCTURALANDSPATIALRELATIONSHIPSBETWEENINDIVIDUALPARTSSUCHAREPRESENTATIONMUSTSUPPORTTHECONSTRUCTIONOFANASSEMBLYFROMALLTHEGIVENPARTS,CHANGESINTHERELATIVEPOSITIONINGOFPARTS,ANDMANIPULATIONOFTHEASSEMBLYASAWHOLEMOREOVER,THEREPRESENTATIONSOFASSEMBLIESMUSTMEETTHEFOLLOWINGREQUIREMENTSFROMDESIGNERS1ITSHOULDBEPOSSIBLETOHAVEHIGHLEVELOBJECTSREADYTOUSEWHILEMOULDDESIGNERSTHINKONTHELEVELOFREALWORLDOBJECTS2THEREPRESENTATIONOFASSEMBLIESSHOULDENCAPSULA
编号:201311171644037408    类型:共享资源    大小:133.74KB    格式:PDF    上传时间:2013-11-17
  
5
关 键 词:
教育专区 外文翻译 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--注塑模具自动装配造型 英文版.pdf
链接地址:http://www.renrendoc.com/p-97408.html

当前资源信息

4.0
 
(2人评价)
浏览:12次
英文资料库上传于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   

相关资源

  • Thomas_Calculus_13th(托马斯微积分 13版)Thomas_Calculus_13th(托马斯微积分 13版)
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊2016】借助于电缆驱动系统改进工业机器人的静态性-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊2016】借助于电缆驱动系统改进工业机器人的静态性-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊2016】借助于电缆驱动系统改进工业机器人的静态性-外文文献[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊2016】借助于电缆驱动系统改进工业机器人的静态性-外文文献
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】最小化模式下料问题科林麦克迪尔米德-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】最小化模式下料问题科林麦克迪尔米德-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】组合机床行业现状与发展思考-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】组合机床行业现状与发展思考-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】自行航水器真正自治-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】自行航水器真正自治-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】自行航水器真正自治-外文文献[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】自行航水器真正自治-外文文献
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】注塑模具的设计与热分析-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】注塑模具的设计与热分析-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】注塑模的单浇口优化-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】注塑模的单浇口优化-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】注塑模的单浇口优化-外文文献[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】注塑模的单浇口优化-外文文献
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】主轴平衡力和曲轴弯曲应力的研究-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】主轴平衡力和曲轴弯曲应力的研究-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】轴对称降落伞形状的研究-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】轴对称降落伞形状的研究-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】轴对称降落伞形状的研究-外文文献[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】轴对称降落伞形状的研究-外文文献
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】中国乘用车燃料经济性标准的组成和影响-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】中国乘用车燃料经济性标准的组成和影响-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】指垫和平面之间的动态交互作用:实验和分析-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】指垫和平面之间的动态交互作用:实验和分析-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】指垫和平面之间的动态交互作用:实验和分析-外文文献[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】指垫和平面之间的动态交互作用:实验和分析-外文文献
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】直线电机高速数控切断机的发展-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】直线电机高速数控切断机的发展-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】直线电机高速数控切断机的发展-外文文献[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】直线电机高速数控切断机的发展-外文文献
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】支持机床系统的面向对象设计-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】支持机床系统的面向对象设计-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】支持机床系统的面向对象设计-外文文献[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】支持机床系统的面向对象设计-外文文献
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】振动镗孔与振动钻孔的研究-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】振动镗孔与振动钻孔的研究-中文翻译
  • 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