电火花加工中放电点的温度场仿真与研究  

Simulation and research of electric discharge temperature field

作　　者：朱中槐 叶树林[1] 

机构地区：[1]佛山科学技术学院机电工程系,广东佛山528000

出　　处：《佛山科学技术学院学报（自然科学版）》2017年第6期35-40,共6页Journal of Foshan University(Natural Science Edition)

基　　金：广东省研究生教育创新计划资助项目(2014QTLXXM42)

摘　　要：建立电火花放电通道的有限元模型,利用ANSYS软件对电火花放电过程中放电通道作用于工件表面的温度场分布进行仿真。根据仿真结果并结合模型材料的物理性能,分别以放电脉宽和放电电流为单一变量,探索并建立蚀除凹坑随放电脉宽、放电电流变化的理论模型。利用自制的实验装置在铝合金表面进行单脉冲电火花放电实验,并以空气作为放电介质。研究表明,仿真结果与实验加工的铝合金表面蚀除凹坑的半径较为吻合。可用有限元仿真来预测电火花加工形成的蚀除凹坑的生长规律,为电火花的表面处理以及拓展电火花的应用领域提供科学的理论指导。Finite element models of electric spark discharge channel was built in the paper, discharge plasma channel works on the temperature filed distribution of the workpiece surface, then do a ANSYS simulation in the process of EDM discharge. According to the simulation results and the physical properties of model materials,discharge pulse width and discharge current is a single variable separately. This article explores and establishes the theoretical model of erosion pits with discharge pulse width and discharge current changes. The experiment of single pulse spark discharge is carried out by homemade test device on the surface of aluminum alloy, and the air is used as the discharge medium. The research shows that the simulation results are accorded with the radius of aluminum alloy surface＇s erosion pits during the experiment. So the finite element simulation can be used for predicting erosion pits growth pattern on the electrical discharge machining, it provides scientific theoretical guidance on the EDM surface treatment and an extension of the application field of EDM.

关 键 词：电火花加工 有限元分析 温度场仿真 单脉冲 蚀除凹坑 

分 类 号：TG484[金属学及工艺—焊接]