摘要
通过选取合适的热源模型、热边界条件,建立了气体介质中电火花表面强化加工的热传导模型;分析其温度场特点,建立了气体介质中电火花表面强化的二维温度场模型;并利用ANSYS有限元分析软件对气体介质中电火花表面强化的温度场进行了有限元数值模拟,分析了工件电极在不同时间、不同位置的温度场分布和变化规律,以及电火花加工时的电流参数对温度场的影响。结果表明:电火花表面强化层的放电凹坑主要是热量在材料中不同方向的热传导存在差异引起的,且具有快速加热和冷却的特点;在相同的加工速度下,节点的温度随着电流的升高而增大。
A heat conduction model of EDM surface strengthening in gas was built, through selecting proper heat-source model and the thermal boundary condition. A 2D temperature field model of electrical discharge surface strengthening was established according to the character of temperature field. The influence of electrical parameters on temperature field, the temperature field distribution of the workpiece electrode at different time and place were analyzed by finite element analysis software ANSYS. The results showed that the heating and cooling speed of EDM surface strengthening layer was very rapid, and the node temperature increased with electric current increasing under the same processing speed.
出处
《青岛科技大学学报（自然科学版）》
CAS
2010年第1期76-79,共4页
Journal of Qingdao University of Science and Technology:Natural Science Edition
作者简介
张明（1960-），男，教授．
