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1、纯钛义齿支架精密铸造缩松预测及铸造工艺优化童铃，王璐，吴树洪，江晓峰重庆医科大学附属口腔医院，口腔疾病与生物医学重庆市重点实验室，重庆：401147摘要：目的研究铸型温度和铸造压力对纯钛义齿支架缩松形成的影响，指导铸造工艺的优化。方法实际铸造一副结构复杂的支架模型，建立包括浇注系统的CAD模型，应用铸造仿真模拟软件ProCAST模拟精密铸造纯钛义齿支架的凝固过程，预测缩松形成的位置及数量。通过分析凝固收缩百分数，修正铸型温度及铸造压力设定值，优化铸造工艺。结果A1组模型中存在大量缩松，A2、B1组分别提高了铸造
2、压力和铸型温度后缩松明显改善，其余各组相差不大，提示需采取额外的补缩措施。结论提高铸型温度或铸造压力均能大大改善铸件质量，需要采取安置储金球、补充流入道、增加溢流槽等措施避免缩松形成。关键词：纯钛义齿支架；缩松；计算机数值模拟PredictionofshrinkageporosityintitaniumdentureframeworkscastingandoptimizationthecastingtechniqueTongLing,WangLu,WuShuhong,JiangXiaofeng(Theaffil
3、iatedhospitalofStomatology,ChongqingMedicalUniversity,ChongqingkeyLaboratoryoforaldiseaseandbiomedicine,Chongqing,401147,China)Abstract:ObjectiveToinvestigatetheeffectofmodeltemperatureandcastingpressureonshrinkageporosityintitaniumdentureframeworks,toguidet
4、heoptimizationthecastingtechnique.MethodsAcomplexmodelofRPDframeworkwasfabricated.Geometryoftheframeworkandspruegatedigitalmodelwasestablishedbyusing3Dlaserscanningtechnologyandreverseengineeringtechnology.Solidificationandpredictionofpositionandquantityofsh
5、rinkageporosityintitaniumdentureframeworkscastingwereperformedusingthethesimulationsoftwareProCAST.Byanalyzingsolidificationshrinkagepercentage,optimizingthecastingtechnique.ResultsalotofshrinkageswereingroupA1.Whencastingpressureandmoldtemperatureincreasedr
6、espectivelyingroupA2andB1,simulationresultsshewthattheporositydecreased.Theothergroupswerethesamebutthedifferencewasnotsignificant,therefore,additionalmeasuresofshrinkagecompensatingmeasureswereadvised. ConclusionIncreasethemodeltemperatureorpressurecastingc
7、ouldgreatlyimprovethequalityofcastings.In addition,someadditionalmeasuressuchasensconcingthereservoir,increasingtheinflowtract,settingtheoverflowslot shouldbetaken.Keywords:TitaniumRPDFramework;ShrinkagePorosity;ComputerSimulation基金项目：数值模拟对纯钛义齿支架铸道安插方式的比较研究，
8、2012-2-120作者简介：童铃，女，硕士研究生，医师，研究方向：固定修复与材料运用。电话：18623517272，E-mail:tongling0912@qq.com通讯作者：江晓峰，电话：13883273687E-mail:315794149@qq.comCorrespondingauthor:JiangXiaofeng,Tel:13883273687,E-mail:315794
