电火花磨削加工蜂窝环的热物性参数研究及表面温度场仿真分析

Research on Thermal Physical Parameters and Surface Temperature Field of EDG Machining Honeycomb Ring

基于GH536高温合金材料的性能特点,通过试验利用数值模拟方法得到了GH536高温合金的热物性参数随温度变化的非线性规律,并利用ABAQUS软件对电火花磨削加工蜂窝环时温度场分布进行了有限元模拟,分析了温度场分布对蜂窝环表面加工质量的影响。试验结果表明:利用有限元分析对电火花磨削蜂窝环时温度场的分布规律进行模拟是可行的,且模拟过程准确、迅速,适用于电火花磨削薄壁类零件的工艺过程的优化,更为精确计算电火花磨削过程中产生的热应力、残余应力等提供了理论依据。

Based on the characteristics of GH536 super alloy material, the nonlinear rules of change in its thermal physical parameters with temperature is obtained through the test using a numerical method, and the finite element simulation of temperature field distribution of electrical discharge griding （EDG） honeycomb ring is made using ABAQUS, and the effect of temperature field distribution on quality of surface of honeycomb ring is analyzed. The results show that it is feasible to use the finite element analysis to simulate the distribution law of the temperature field in the EDG honeycomb ring, the simulation process is accurate and rapid, and it is also applied to optimize the craft process of EDG related thin-walled parts. It can be also used to provide the theory basis of calculating precisely the thermal stress and residual stress in EDG processing.