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1、精铸件的防缩工艺措施实例Abstract:thebasicprincipleoftheexamplesdiscussedsuchassubsidies,temperaturegradient,fillingcastingusedincasting,computernumericalsimulationplatforminprocessdesign,combinedwiththematerialpropertiesandcastingcharacteristics,comprehensiveadjustmentprocess,reducetheamountofwate
2、r(atthemouth),inordertoachievebettereconomicbenefit.Keywordssolidificationmode;heatstoragecoefficient;subsidy;temperaturegradient;moldfilling;Theinvestmentcastingisdifferentfromothercasting,mainlyundertheredshell(about1050degreesCelsius)undertheconditionofpouring.Itbringsgoodfillingcap
3、acityofthecastingsurfaceissmooth,butthecastingshrinksalsobroughtmanyproblems,suchas:simultaneoussolidificationheatsectiondispersedandisolatedhotspotfeeding;technologicalmeasuresserieswillshrinkholetransferredtothefeedingsystem[afterfeedingdistancecalculationandrisertheincreaseintheamou
4、ntof1],becauseofchangesinthestructureofthecastingmold,thethicknessoftheshellandtherefractorymaterialfordifferentcurrentprocessmostlyorbyexperience.Duetotheinvestmentcasting,castingsystemunderthegeneralconditionofthegateisalsosupportingriser,shellmaking,processingmeanschangeable,sothatt
5、helimitedwater(take)tosolvetheproblemoftheamountofcomprehensiveport,andlessisthepointofthispaper.I.subsidiesTheso-calledsubsidythroughtheopenexpansionangletotheriser,riserandguaranteebetweenthefeedingpositionofthefeedingchannel[2].Thevalveseatisanexampleoftheapplicationallowance,thequa
6、lityofwhichis2.62Kg.ByagraphandshowninFiguretwothathotspotarea,suchasthearrowpointscanbesettothepommelhorse(take)pouringmouth,theproblemismorethantherootoftheinconveniencegrindinggateatthesametime,duetolimitedpositionbutalsopronetoantishrinkageandshelleasytofallthesituation.Thegatingsy
7、stemdesignedhereisatransfer,asshowninFigurethree,asubsidizedpouring(opening).Accordingtothecompensationdistance,modulusperimetercommerciallawcalculation[2],aftercomprehensiveanalysisoftemperaturegradientdistribution,setupasafigureofthegrouptreeprogram,astringoftwopieces.Butaftersimul
