汽車鋁合金發(fā)動機缸體壓力鑄造過程數(shù)值模擬.pdf

1、合肥工業(yè)大學碩士學位論文汽車鋁合金發(fā)動機缸體壓力鑄造過程數(shù)值模擬姓名：孫林申請學位級別：碩士專業(yè)：材料加工工程指導教師：蘇勇20100301NumericalSimulationofDieCastingProcessforAalloyCylinderBlockofAutomobileEngineAbstractDiecastingisametalformingmethodwithhighproductionemciency，highpr

2、oductionqualityandhighprecisionInthispaper，theAalloyenginecylinderblockisregardedastheresearchobjectThesoftwareProCASTisemployedtosimulatethe6llingandsolidincationprocessfordiecastingThroughthestudyofnumericalsimulation，

3、itcanguidetofixamorereasonablediecastingprocess，improVethecastingqualityandreducethetimeofdesignthemold，andthencanguideactualproductionThecylinderblockisadissynlmetricalstructureanddif他rentheightandthicknessdiecastingIti

4、sVerydimculttoproductInthispaper，basedonthestructureofcylinderblock，thegatingsystemandoVerflowwellaredesignedBasedontheprocessofdie—castingandtechnicalparameters，thecoldchamberdiecastingmachineJ11l1OGischosenThentwodiffe

5、rentgatingpositionprojectsaredesignedTheVirtualmoldtechnologyofProCASTisemployedtosimulatetheprocessThroughcomparingwiththeformingofgastrappingandshrinkageporosityinthetwoprojects，theprojectwhosegatingpositionisonthebott

6、omofcylinderblockandwhosepouringangleis45degreeischosenByuseoforthogonaltestdesign，howthei11jectionspeed、pouringtemperatureandmoldtenlperatureeffectsthecastingshrinkageporosityformingisstudiedTheresultsshowthatmoldtemper

7、atureisthemostsigni行cantinfluencefactor，injectionspeedtakesthesecondplace，andpouringtemperatureistheleastsigniflcantinfluencefactorTheprojectthatinjectionspeed45m／s，pouringtemperature680℃，moldtemperature240℃isthebestonet

8、hattheshrinkageporosityistheleastThen，threeprojectsthatthegatedimensionis579mm‘，600mm2，62lmm2respectivelyaresimulatedandanalyzedTheresultsshowthattheprojectofgatedimension621mm2isthebestonethatcastingdefectistheleastFina

9、lly，thediecastingmoldandtwodif詫rentcoolingchannelsaredesignedTheheatbalanceandthermalstressofthedie—castingmoldisstudiedTheresultsshowthatadoptingagoodcoolingchannelproject，themoldtemperaturecanbecontrolledinareasonabler