Al2O3陶瓷引弧微爆炸加工温度场模拟

张保国; 林克凌; 田欣利; 薛春芳; 李富强

doi:10.11883/1001-1455(2012)02-0129-07

Al2O3陶瓷引弧微爆炸加工温度场模拟

装甲兵工程学院再制造技术重点实验室,北京100072;

装甲兵工程学院机械工程系,北京100072

基金项目:

国家自然科学基金项目(51075399)

详细信息

通讯作者:
张保国

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NumericalsimulationoftemperaturefieldforAl2O3ceramics duringmicro-detonationofstrikingarcmachining

ScienceandTechnologyonRemanufacturingLaboratory,

AcademyofArmoredForcesEngineering,Beijing 100072,China;

Funds:

NationalNaturalScienceFoundationofChina(51075399)

More Information

Corresponding author: ZHANG Bao-guo

摘要: 建立了Al2O3陶瓷引弧微爆炸加工(micro-detonationofstrikingarcmachining,MDSAM)过程的传热模型,基于有限元理论,利用ANSYS软件对加工过程中的温度场分布进行了模拟。结合材料性质,对模拟和实验得到的蚀坑尺寸进行了比较,并分析了加工参数对温度场的影响。模拟结果表明,Al2O3陶瓷引弧微爆炸加工时在给定的加工参数下的最高温度可达13435℃,且高温影响区范围很小,加工实验与模拟结果符合较好。随着脉冲宽度和工作电流的增加,加工区域的温度以及蚀坑的半径和深度增大;随着喷嘴半径的增大,加工区域的温度降低而蚀坑的径深比增大。模拟结果可为Al2O3 陶瓷引弧微爆炸加工过程中表面形貌的预测、材料去除机理的揭示以及加工参数的选择等提供参考。

关键词:

Abstract: AthermaltransfermodelforAl2O3ceramicsduringmicro-detonationofstrikingarcmachining( MDSAM)wasestablished.Basedonthefiniteelementtheory,thetemperaturefieldofAl2O3 ceramicsduringMDSAM wassimulatedwiththeaidoftheANSYSsoftware.Combinedwiththematerialproperties, thesimulatedcavitydimensionwascomparedwiththemachiningexperimentalresultandtheeffectsofthemachiningparametersonthetemperaturef eldwereanalyzed.ThesimulatedresultsshowthatthehighesttemperatureofAl2O3ceramicsduringMDSAMcanreach13435℃ withthegivenmachiningparameters.Theheat-affectedzoneisquitesmallandthemachiningtestis consistentwiththesimulatedresults.Withtheincreaseofthepulsewidthandtheworkingcurrent, thetemperatureoftheprocessingregionandtheradiusanddepthofthecavityincrease.Thetemperaturedecreaseswiththeincreaseofthenozzleradius, whereasthediameter-to-depthratioofthecavity increases.Thesimulatedresultscanprovideanimportantreferenceforthepredictionofthesurface topography,thedisclosureofthematerialremovalmechanism,andtheoptimizationofthemachining parametersforAl2O3ceramicsduringMDSAM.

Key words:

mechanicsofexplosion /
temperaturefield /
micro-detonationofstrikingarcmachining /
Al2O3ceramics