多物理场耦合分析下的电解加工环形窄槽数值模拟研究

Numerically Simulating Electrolytic Machining of Annular Narrow Slot with Multi-physical Field Coupling Analyzed

针对环形窄槽结构电解加工过程工艺试验周期长,型面难以预测的问题,建立掩膜电解加工过程电场、流场、温度场耦合数学模型,利用COMSOL软件对多物理场进行数值模拟仿真,得到加工间隙内电解液电流密度、流速和压力的分布规律,并将加工过程中不同时刻耦合场仿真结果进行对比,得到加工进程中各参数变化规律。研究结果表明,多物理场耦合仿真能够准确模拟实际电解加工过程,实现了工艺参数选取,为实际工艺提供了理论依据,对提高窄槽结构电解加工质量和效率有重要意义。

To solve the problem of long test period and difficult prediction of shape and surface in the process of electrochemical machining of annular narrow slot structure,a coupled mathematical model of electric field,flow field and temperature field was established.The multi-physical field coupling simulation was conducted with the COMSOL software to obtain the distribution patterns of the density,velocity and pressure of electrolytic current in the machining gap.The simulation results on the coupling field in different periods in the machining process were compared to obtain the variation patterns of each parameter.The multi-physical field coupling simulation can accurately simulate the actual electrolytic machining process,select process parameters,provide a theoretical basis for actual processes and significantly improve the quality and efficiency of the electrolytic machining of a narrow slot.