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1、精铸件的防缩工艺措施实例（Examplesofshrinkproofinvestmentcastingprocessmeasures）Abstract:thebasicprincipleoftheexamplesdiscussedsuchassubsidies,temperaturegradient,fillingcastingusedincasting,computernumericalsimulationplatforminprocessdesign,combinedwiththematerialproper
2、tiesandcastingcharacteristics,comprehensiveadjustmentprocess,reducetheamountofwater(atthemouth),inordertoachievebettereconomicbenefit.KeywordssolidificationheatstoragecoefficientoftemperaturegradientfillingsubsidiesThedifferenceofcastingcastingismainlyrelativ
3、etootherredshell(1050DEGC)undertheconditionofcasting.Itbringsgoodfillingcapacityofthecastingsurfaceissmooth,butthecastingshrinksalsobroughtmanyproblems,suchas:simultaneoussolidificationheatsectiondispersedandisolatedhotspotfeeding;technologicalmeasuresseriesw
4、illshrinkholetransferredtothefeedingsystem[afterfeedingdistancecalculationandrisertheincreaseintheamountof1],becauseofchangesinthestructureofthecastingmold,thethicknessoftheshellandtherefractorymaterialfordifferentcurrentprocessmostlyorbyexperience.Duetothein
5、vestmentcasting,castingsystemunderthegeneralconditionofthegateisalsosupportingriser,shellmaking,processingmeanschangeable,sothatthelimitedwater(take)tosolvetheproblemoftheamountofcomprehensiveport,andlessisthepointofthispaper.AsubsidyTheso-calledsubsidythroug
6、htheopenexpansionangletotheriser,riserandguaranteebetweenthefeedingpositionofthefeedingchannel[2].Aseatisanexampleofasubsidyapplication,thequalityof2.62Kg.ByagraphandshowninFiguretwothathotspotarea,suchasthearrowpointscanbesettothepommelhorse(take)pouringmout
7、h,theproblemismorethantherootoftheinconveniencegrindinggateatthesametime,duetolimitedpositionbutalsopronetoantishrinkageandshelleasytofallthesituation.Accordingtothedesignofthegatingfeedingsystemistransferred,asshowninFigurethreeatypecast(take)exportsubsidies
8、.Accordingtothefeedingdistance,perimeterquotientcalculationmodulus[2],acomprehensiveanalysisofthetemperaturegradientdistributionwassetafterthegroupplansatreeasastringoftwopieces.Butaftert
