电加工与模具
電加工與模具
전가공여모구
ELECTROMACHINING & MOULD
2015年
3期
16-20
,共5页
微细电火花加工%分子动力学%放电凹坑%热影响层%熔融再凝固层
微細電火花加工%分子動力學%放電凹坑%熱影響層%鎔融再凝固層
미세전화화가공%분자동역학%방전요갱%열영향층%용융재응고층
micro-EDM%molecular dynamics%discharge crater%heat affected zone%re-solidified layer
为从微观角度研究电火花加工蚀除机制，利用分子动力学方法，基于改进的能量输入方式，采用膨胀的高斯热源模型模拟电火花加工中放电通道的热作用，对微细电火花加工放电凹坑的形成过程和由熔融再凝固层及热影响层组成的表面变质层特性进行了仿真研究。
為從微觀角度研究電火花加工蝕除機製，利用分子動力學方法，基于改進的能量輸入方式，採用膨脹的高斯熱源模型模擬電火花加工中放電通道的熱作用，對微細電火花加工放電凹坑的形成過程和由鎔融再凝固層及熱影響層組成的錶麵變質層特性進行瞭倣真研究。
위종미관각도연구전화화가공식제궤제，이용분자동역학방법，기우개진적능량수입방식，채용팽창적고사열원모형모의전화화가공중방전통도적열작용，대미세전화화가공방전요갱적형성과정화유용융재응고층급열영향층조성적표면변질층특성진행료방진연구。
In order to clarify the mechanism of material removal in EDM in essence ,the forming process of discharge crater and the characteristics of surface modification-lay ,including heat affected zone and re-solidified layer,were studied by using molecular dynamics (MD) method. In this MD model for EDM,to imitate the input of thermal energy,the input discharge power was kept constant at every moment during the discharge duration ,and a linearly expanding gaussian heat source was used to imitate the heat flux from the discharge arc column.
