摘要
放电通道等离子体中的热源是工件材料蚀除的最主要动力。通过对电火花放电过程建立数学物理模型,以热流密度和热对流作为最主要热载荷,动态施加于放电点处。用有限元AN-SYS软件对所建立的模型进行了温度场分布仿真,讨论了不同峰值电流和脉冲宽度条件下,放电蚀坑深度和半径的变化规律。计算结果和试验结果比较后发现,模型对蚀坑深度和半径的变化有较好的预测精度。
Plasma heat source of the electro-discharge channel is the mostmain power which removes the workpiece material. This paper has established mathematics physical model of electrio-discharge machining（EDM） process. The heat flux and convection were used as main dynamic thermal load that was exerted discharging positions. Based on the model the temperature field distribution within zone in the workspiece material were simulated by ANSYS and the relationships between discharge crater shape and parameters were also explored through simulation under different pulse-on time and current. Compared simulation and experimental results, the model has the preferable precision of prediction.
出处
《电加工与模具》
2008年第2期8-11,28,共5页
Electromachining & Mould
