Abstract: In order to solve the problems of large scale of ablation particles, the chip removal difficulty and processing instability in the processes of atomizing discharge ablation forming blind holes, the forming electrodes of hollow copper pipes combined with the square copper billets were made. The simulation analyses and comparisons of the flow field and particle concentration distribution for without wall slot electrodes and with the wall slot electrodes were carried out respectively. The atomizing electrode ablation experiments were carried out based on the flow field simulation results. And the surface topographies of the workpieces machined by two type electrodes were compared and analyzed. The experimental results show that when the slot width is as 1 mm, the slope angle is as 60°, the ablation efficiency is the highest. Under the same atomization ablation processing conditions, compared with the without wall slot electrodes, the removal rate of with wall slot electrodes increases by 15.7%, the relative loss rate of with wall slot electrodes increases by 6.2%. The surface quality of the with wall slot electrodes is better than that of without wall slot electrodes. The experimental results were verified the correctness of the simulation results.

Key words: atomization ablation, wall slot electrode, simulation, forming

摘要： 为解决放电雾化烧蚀成形加工盲型孔过程中出现的烧蚀颗粒大、排屑难、加工不稳定问题,制作了中空铜管与正方形紫铜块相结合的成形电极,分别对无壁槽电极和壁槽电极的极间流场及颗粒质量浓度分布进行了仿真分析与比较,基于极间流场仿真结果进行了雾化烧蚀对比实验，并对两种电极加工工件表面形貌进行了对比分析。实验结果表明：当槽宽为1 mm、倾斜角为60°时，烧蚀效率最高。在相同加工条件下进行雾化烧蚀加工时,与无壁槽电极相比，壁槽电极的蚀除速率提高了15.7%,壁槽电极的电极相对损耗率增大了6.2%。壁槽电极加工时的表面质量比无壁槽电极加工时的表面质量高。实验结果验证了仿真结果的正确性。

关键词: 雾化烧蚀, 壁槽电极, 仿真, 成形加工