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1、精铸件的防缩工艺措施实例（Examplesoftheanti-shrinkageprocessofthecastingparts）Abstract:throughexamplesthispapersuchassubsidies,suchastemperaturegradient,fillingthebasicprinciplesofcastingusedinrevestmentprecisioncasting,intheprocessdesignbycomputernumericalsimulation
2、platform,combinedwiththefeatureofmaterialpropertiesandcasting,comprehensiveadjustmentprocesscharacteristics,reducingtheamountofmouthwatering(risk),inordertoachievebettereconomicbenefit.Thetemperaturegradientfillingtypeoftheheataccumulationcoefficientofth
3、ekeywordssolidificationmodeRevestmentprecisioncastingthanothercastingdifferencemainlyredshellcasting(1050℃)conditions.Itbringsgoodfillingcapacitytomakethecastingsurfacesmooth,buttheshrinkageofcastingalsobringsalotofproblems,suchas:theuseoftheheatofthesam
4、etimetosolidifytheheatofthedispersionandtheheatoftheisolatedheat;Transfertheshrinkagecavityandthedistancetothefeedingsystemafterthefeedingriserofalargenumberofcalculations[1]seriesoftechnologicalmeasures,suchasduetostructurechange,thethicknessoftheshellm
5、ouldcastingsandthesuitablerefractorymaterialisdifferent,atpresentmostoftheprocessingorfromexperience.Duetothesmallinvestmentcastings,generalconditionsgateandriserofgatingsystem,atthesametimeorshellmaking,bymeansofchangingprocess,makethelimitedmouthwateri
6、ng(take)thedosageofthecomprehensiveproblemsolving,andthelessthebetteristhepointofthispaper.A,subsidiesTheso-calledsubsidyistheexpansionAnglewhichisopentotherisertoensurethatthereisasupplementarychannelbetweentheriserandthereplenishingpart[2].Figureonesea
7、tisanexampleofapplicationsubsidieswithaqualityof2.62Kg.Byknownasshowninfigure1andfigure2hotsectionarea,suchasthearrowpositioncanbesettothesidehorsemouthwatering(take),theproblemisinconvenienttogrindthegatemorethanatthesametime,duetothelimitedpositionisea
8、sytoappearwhentheshrinkageandshellmakingeasyoffthingtohappen.Thedesignedgatingsystemisatransfer,asshowninFIG.3,asubsidygate.Accordingtothecalculationoftheshrinkagedistanceandthecalculationofthemoduleofthemodule[2],thegroup
