外文翻译-压铸工艺及压铸模具设计要点.doc

外文资料翻译系别XXXXXXX专业XXXXX班级XXXX姓名XXX学号XXXXX指导教师XXXXXX2010年4月1CompressioncastingcraftandcompressioncastingmolddesignmainpointAbstract:Thedie-castingmachine,themoldandthealloythree,takepressthecastingasthis,amongthecompressioncastingcraftpenetration,theirconformityisorganicallyaeffectivesystem,causesthedie-castingmachineandthemoldobtainsthegoodmatch,playstheoptimizationtopressthecastingstructure,theoptimaldie-castingmachine,theoptimizationpressesthemolddesign,enhancesthecraftoperatingpointtheflexiblerole,thusprovidesthereliableguaranteeforthecompressioncastingproduction.Therefore,thecompressioncastingcraftlieswithininthemoldsaying,depthoftheconnotationisself-evident.Keyword:Die-castingmachine；Mold；Compressioncastingcraft；Themolddesigns1.Die-castingmachine-mold-alloysystemDie-castingmachine,themoldandalloythesethreefactors,inpressesinthecastingproductionprocess,theyconstitutedasystem,namelythedie-castingmachine-mold-alloysystem,itistakepressesthecastingasthis,amongthecraftpenetration,entrustswiththesystemvigorandtheefficiency,butthemoldisthecraftentersthesystemtheplatform.Thedie-castingmachine,themoldandthealloythreerelationsexpressedvividlyasshowninFigure1.Thedie-castingmachine-mold-alloysystemmainperformanceis:(1)Ingatepositioninfluencebackfillmetalmeltflowdirectionandthecondition,withthebackfilldiespacequality,havethedecisiveinfluencetothemoldstructureandthecraft,thisisthekeyisat.(2)Designationbestsufficienttime,thisisextremelyimportantonestep,affectstosufficienttimemetalmeltrateofvolumeflow(Q),alsoisthesufficientpower,accordingtotheaboveandcomputationingatesize.(3)Choiceexhaust,overflowpositionandsize,exceptoutsidenormalexhaust,pollutiondischargeandtemperaturebalance,butalsomayreducetheimpactpressure,avoidsthemetalsplashingandproducingtheburr.(4)Heatingandcooling,balancedmoldtemperature,maintenanceoperatingtemperature.2.CompressioncastingcraftsandthemolddesignkeytechnologiesWhencompressioncastingtheingatepositioninfluencepressesthecastingthestructuraldesign,thequalityandthecompressioncastingmolddesign,mayobtainthecorrectestablishmentingatepositionpromptthroughtheinquirymaterial.Asaresultofthecastingstructuremultiplicity,mustchoosetheingatethecorrectpositionisvery2difficult,butalsohassomebasicrequests,likethoughtgenerallytheestablishmentingatemustcausesufficientwhenthemetallicjethasasfaraspossiblecomparedthelongdistancebytheopenjetinthediespaceaverage,alsoisthecorrectingateposition,theshape,thesize(flowstoangle)tocoordinatethecompressioncastingparametertobepossibletoobtainthemetallicjettoexpandalongthewallunceasingorder,tochange,andcontinuouslyexpandstotheterminus.Thediespacemajority(i.e.branchdiespace)completesbythejetflowbackfill,onlythenasmallpartofdiespace(i.e.non-branchdiespace)bythemetalmeltbranchsupplementedcompletesorcollidesbythemetalmeltstockclasscompletesthebackfill,andoverflowsthesystemeliminationvestigesthroughtheplatoon.Figure2isinthepouringpositionandbranchdiespaceschematicdrawing1”.Theidenticalpressurecastingchoicedifferentingatepositionandflowstotheangle,whenmayobtaintheareapercentagewhichthedifferentbranchdiespace,thenon-branchdiespaceandholdrespectively,Figure2theshellcompressioncasting,becausetheingatepositionisdifferent,obtainsthedifferentbranchdiespaceandthenon-branchdiespace.Thechart2aingateisverticaltoonesidewall,becausethecomponentscrownlongsquareedgedorificeseparatestwosidewalls,theresultisonlythenonesideforthebranchdiespace；Mustfillanotheronesidewall,mustpassthroughtherunningchannelbothsidesattachmentpoint,thefinaltwoliquidflowgatheringcompletesthepacking,thispartisthenon-branchdiespace.Becausethebranchdiespaceaccountsfortheareapercentagenottobehigh,thereforecanproducethemassivewasteproducts,likechart2a1.Inchart2b,theingatepositiondoesnotmakethechange,onlyiswallthicknessandsooncrownrectangleKongYongcraftmusclesconnects,likethisfillswhenthemetalmeltchanges,fillsanotheronesidewallalongthemuscleboard,causedtwosidewallsbothtobecomethebranchdiespace,increasedthebranchdiespacetoaccountforthepercentage,thecastingqualityalsolargescaleenhances,likechart2b1.Inchart2c,thecomponentsandchart2aaresame,thecrownsquareedgedorificedoesnotaddthecraftmuscle,butestablishestheingateinacomponentsend,suchmetalmeltsimultaneouslycarriesonthebackfillfromtwosidewalls,thusexpandedthebranchdiespacepercentage,hadguaranteedthequality,enhancedthequalifiedrate.Thisistheidenticalcomponentsthreekindofingateestablishmentplan,theproofingatepositioncrucialnature.Althoughthecomputertechnologyishelpfultothedesignationingateposition,butthecomputertechnologyisonlyonemethod,buttheingatepositiondesigndidnotlosewasstillakeytechnologies.Between3compressioncastingcraftmainpoint3.1metalpressures,thespeedandthecurrentcapacityrelationsIntheprinciplethedie-castingmachinearealiquidmetalpump,ittransportsunderthepressurethemetalmelttothecompressioncastingmodelcavityin.Thepumpcharacteristicistransportsthepower(rateofvolumeflow),isthepressurefunction,thisaspectasearlyasinthe70s,firstmakesthevaluabledevelopmentwork3byAustralianAsiaCSIRO,hasestablishedausefultoolwiththepQ2chart,accordingtothecastingi.e.moldrequest,decidedthemachinetheadjustmentvalue,isoriginallyusesinthehotcelldie-castingmachinethezincbasealloypressinginthecasting,butveryquickexpandstoLengShijion.Inprinciple,nowthepressureandtherateofvolumeflowrelationswhichknewverywellfromthehydromechanicsprinciple,shiftstothedie-castingmachinepracticalapplication.Themetalpressureishigher,isalsoquickerinthespraynozzleandtheingateplacemetalmeltflowrate,butalsomustconsidervictoryflowresistancewhichasaresultoftheflowingsectionchange,thedirectionchangeandthewallroughnessexistenceproduces,xiexpressessumofthetheseresistancewiththefrictioncoefficient.Iftheknownimmeasurablesteelcoefficientxi,maycalculatethemetalpressurewhichcertainingatespeedneeds,accordingtothecompressioncastingalloyandthecastingrequest,theingatespeedhasanempiricalvalue,shouldobserve,seeTable1,thereforeneedsthedie-castingmachinetoprovidethecorrespondingspeed.Table1ingatespeedselectionTable1ChoiceofvelocityatingateProjectA1MgCuZna(m.s-1)25-6040-9030-4530-50Thelowvalueusesintherelativelythickcasting,thehighvalueusesintherelativelythincasting,commonmagnesiumalloycastingingatespeedcomparedtoaluminumhigh25%.Timethevacuumdiecastingingatespeedis15-30m/s.3.2Takethecastingasthis,optimizesthedie-castingmachine-mold-alloysystem,enhancesthecraftflexibilityInthedie-castingmachine-mold-alloysystem,throughtheadjustmentcraftparameter,mayimprovepressesthecastingthequalityandtheperformance.Thesecraftparameterdefinedwithworkwindow(OW).ThisindicatedOWisthesecraftparameterlimitchart.Inthecompressioncastingcraft,thesufficienttime,theing