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ID:6812075
大小:1.02 MB
页数:24页
时间:2018-01-26
《机械设计及其自动化专业毕业设计(论文)外文翻译》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、南湖学院毕业设计(论文)外文翻译资料作者届别2011系别机械与电子工程系专业机械设计及其自动化指导老师职称副教授完成时间2011年5月18日23AutomatedsurfacefinishingofplasticinjectionmoldsteelwithsphericalgrindingandballburnishingprocessesAbstractThisstudyinvestigatesthepossibilitiesofautomatedsphericalgrindingandballburnishingsurfacefinishingproc
2、essesinafreeformsurfaceplasticinjectionmoldsteelPDS5onaCNCmachiningcenter.Thedesignandmanufactureofagrindingtoolholderhasbeenaccomplishedinthisstudy.TheoptimalsurfacegrindingparametersweredeterminedusingTaguchi’sorthogonalarraymethodforplasticinjectionmoldingsteelPDS5onamachiningc
3、enter.TheoptimalsurfacegrindingparametersfortheplasticinjectionmoldsteelPDS5werethecombinationofanabrasivematerialofPAAl2O3,agrindingspeedof18000rpm,agrindingdepthof20μm,andafeedof50mm/min.ThesurfaceroughnessRaofthespecimencanbeimprovedfromabout1.60μmto0.35μmbyusingtheoptimalparam
4、etersforsurfacegrinding.SurfaceroughnessRacanbefurtherimprovedfromabout0.343μmto0.06μmbyusingtheballburnishingprocesswiththeoptimalburnishingparameters.Applyingtheoptimalsurfacegrindingandburnishingparameterssequentiallytoafine-milledfreeformsurfacemoldinsert,thesurfaceroughnessRa
5、offreeformsurfaceregiononthetestedpartcanbeimprovedfromabout2.15μmto0.07μm.KeywordsAutomatedsurfacefinishing;Ballburnishingprocess;Grindingprocess;Surfaceroughness;Taguchi’smethod231IntroductionPlasticsareimportantengineeringmaterialsduetotheirspecificcharacteristics,suchascorrosi
6、onresistance,resistancetochemicals,lowdensity,andeaseofmanufacture,andhaveincreasinglyreplacedmetalliccomponentsinindustrialapplications.Injectionmoldingisoneoftheimportantformingprocessesforplasticproducts.Thesurfacefinishqualityoftheplasticinjectionmoldisanessentialrequirementdu
7、etoitsdirecteffectsontheappearanceoftheplasticproduct.Finishingprocessessuchasgrinding,polishingandlappingarecommonlyusedtoimprovethesurfacefinish.Themountedgrindingtools(wheels)havebeenwidelyusedinconventionalmoldanddiefinishingindustries.Thegeometricmodelofmountedgrindingtoolsfo
8、rFig.1.Schematicdiagramofthespher
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