ELID超精密磨削砂轮表面氧化膜形成过程的建模和仿真

Modeling and Simulation of Oxide Layer Growth Behaviors in ELID Pre-dressing Process

砂轮表面氧化膜的形成规律与特性对ELID超精密磨削质量有着重要的影响。为了研究在ELID磨削中氧化膜的形成规律,基于电化学基本原理,建立了砂轮表面氧化膜形成过程的一般模型,并对金刚石砂轮电解预修整过程中氧化膜的生长过程进行了仿真。在此基础上,对控制氧化膜生长的主要因素进行了理论分析。为了验证模型和仿真结果的正确性,采用与仿真过程同样的控制参数,对氧化膜的生长特性进行了实验研究。结果表明仿真结果与实验结果基本吻合。

The electrolyzed layer of oxide plays important roles in achieving excellent ELID grinding results. This paper try to modeling and simulating the phenomenon of the oxide layer formed on the diamond grinding wheel surface during pre-dressing in ELID. A general model for ELID pre-dressing process was developed based on fundamental electrochemical laws and ELID precision grinding principle. Some important factors controlling the rate of oxide formation in ELID pre-dressing were investigated. With the simulation results effects of these factors on oxide layer growth characteristics were theoretically analyzed. To validate the model and simulation results ELID pre-dressing experiments which had the same pre-dressing condition with the simulation were done. Good correlation of the oxide layer growth behavior and thickness given by the model and the experiment was found.