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外文翻译--注射模成型零件工作尺寸计算方法分.doc

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外文翻译--注射模成型零件工作尺寸计算方法分.doc

外文翻译AnalysisoftheMethodsforCalculatingtheWorkingDimensionsoftheFormingPartsofInjectionMouldsAbstractThroughthetheoreticalanalysisofthetwomethodsforcalculatingtheworkingdimensionsofthemouldingpartsofinjectionmoulds,thetheoreticaldefectsexistinginthecalculationoftheworkingdimensionsbyaverageshrinkagemethodandtheproblemexistingintheactualmoulddesignwiththiscalculationmethodwerepointedout.Calculationsofthemouldingdimensionsandtolerancesbylimitedtolerancetolerancewereanalyzedandanactualcalculationexamplewasgiven,whichshowedthatthecalculationbylimitedtolerancemethodcanensuretheaccuracyofthemouldingdimensionsandtolerancesinthedesignofinjectionmoulds.KeywordsinjectionmoulddesignworkingdimensiontoleranceInjectmouldshapingpartworkingsizemeanshapingpartuseshapingformouldpiecesofsomesizedirectly.Itsmaintypeisasfollows,typeandradialsizeincluderectangleorspecialshapedtypeandsizelong,wide,typeofcore,typeordepthandhighsize,typeofcore,typeofcore.Typebetweenthecoreorshapingcentresizeunderhole,,whorltypecoreandwhorltypesurroundthesize.Discussinthefront3computingtechnologyofsizeespecially,injectmouldshapingpartworksizeusesizemostcalculateofcalculating.Presentmostplasticsinjectthemoulddesignmanual.Teachingmaterialandreferencematerialadopttheshrinkingratelawequally,thoughthiskindofcomputingtechnologyissimpleandconvenient,existcertainerror,mouldasdesignpieceuseandhavedemandofcooperatinginassembling,ortheprecisionofsizeofmouldingoneisdifficulttoachievethegoalofdesigningwhileexpectingmuch.AstoillustratedinFig.1typicalpart,inpersonwhoshrinkequallyofusingatcalculatingshapingpartsizeofworking,whethertypeandtypecoreadoptthecalculationformulaofthefollowing.ThesizeofradialTypeLmLsLsScp3/4Δz0corelmlslsScp3/4Δz0highsize.TypeHmHsHsScp2/3Δz0corehmhshsScp2/3Δ0zFig.1mouldmouldpiecesofalltothesketchmapofthesizeaMouldtypecorebMouldpiecesofcMouldtypeThesizeofcentretocentrespacingCm=[CsCsScp]±(δz/2)inthetypeMouldthepermissionpublicerrandvalueScpofoneMouldaverageshrinkrate¦ÄzofamaterialThemouldmakespublicerrandCalculationformulatotheabovelistedworkingsizeofmould,mouldtomarkmethodand1Fig.isitshouldchangeandmarktheformofpublicerrandaccordingtosuremethodinordertobemouldoneinFig.1toaccordwithoriginalpublicerrandofpiece,carryonmouldworkthecalculationofsizeaccordingtoformulatheabove.Butthebasesofderivingoftheseformulaearebymouldingtheaverageshrinkrateofone.,Itisaverageinpartinmouldshapingformanufacturepublicerrandvalueandmouldletwithalwayswearingandtearingamount11asestablishingbyconclusioningthatparameterdrawing.Namelymouldmakevalue,szofpublicerrand,isitmouldpieceallow1/one4/5z,publicerrandofvalueandmouldisititspendstobealways15ofwearingandtearingetc.tolettofetch,isitmouldpermission1/15,first4/,publicerrandofvalueofpiecetofetch.UndertherealmouldworkingstateItswearingandtearingactuallyamountusuallyfetches0.020.05mm,itmakepublicerrandvaluefetchIT3oneIT6grademakepublicerrandasthemouldusually.Inadditionmouldshrinkrateofpiecebefluctuated,personwhofluctuateitmouldtohaveindirectradiotomoreincreaseincreasespiecesofsizeatthesametimeMakeerrormouldsizeofpieceisitpresentcubicrootrelationincreasetoincreaseatthesametimeButpersonwhowearandtearmouldincreasetheirofsizeofpieceincreaseslowlyatthesametimealwaysThereforelargesizemouldpiecesoffluctuationofpersonwhoshrinktoisitmouldpiecesofmainfactorofpublicerrandtoinfluence,shouldinjectprocessconditionsandselectforusepersonwhoshrinkfluctuatelittleplasticssteadily.Onthecontrary,astothethingthatsmallsizemouldpiece,isitmouldpiecesofmainfactorofpublicerrandmouldmanufacturepublicerrandandshapingwearingandtearingamount,partofsurface,shapingofparttoinfluence.Butfailtoembodytheseimpactsonworkingsizeofthemouldoffactorintheseformulae,soformulatheabovehavesuretouse

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