基于有限元法的球形数控电解加工工艺试验研究

Research on Experiment of NC-ECM with Spherical Cathode Based on FEM

针对球形阴极数控电解加工中成形规律分析较为困难的问题,提出了基于有限元法的电解加工过程模拟方法。在ANSYS中建立了球形阴极电解加工二维电场的分析模型,并对加工过程的模型进行求解计算,得到了阳极表面不同时刻的电流密度分布和表面形状。以过程模拟参数为基础进行了工艺试验,并将得到的试验值与理论计算值进行了对比,结果表明:该方法可以满足工程计算的精度要求,为深入开展球形阴极数控电解加工过程的研究提供了方法和理论依据。

In order to solve the difficulty in analyzing the shaping law of numerical control electro- chemical machining（NC--ECM） with spherical cathode,the process simulation was carried out based on the FEM. A two--dimensional analysis model of the electric field built in ANSYS software was solved. The current density distribution and the workpiece surface shape on the anode were obtained. The experiments based on the simulation parameters were carried out, and the cutting depth values were measured. The accuracy of the simulation was verified by the comparison between the calculated values and the actual values. It is indicated that the simulation method meets the accuracy of the engi- neering calculations. The method and theory for further in--depth research on the process simulation in NC--ECM with ball--end cathode are provided.