Bańkowski Damian, Młynarczyk Piotr
Department of Metal Science and Manufacturing Processes, Faculty of Mechatronics and Mechanical Engineering, Kielce University of Technology, al. Tysiąclecia Państwa Polskiego 7, 25-314 Kielce, Poland.
Materials (Basel). 2022 Oct 18;15(20):7277. doi: 10.3390/ma15207277.
This article deals with electrical discharge machining (EDM) of an alnico alloy, focusing on how key process parameters affect the surface finish. The experiments were conducted using a BP93L EDM machine. The Box-Behnken design was employed to study the effects of three factors, i.e., spark current, pulse-on time, and pulse-off time, each at three levels, on the surface quality. A specially designed system was employed to increase the effectiveness of the machining process by imparting an additional rotary motion to the tool and an additional rotary motion to the workpiece. The aim was to efficiently remove the eroded metal particles and create a surface with smaller craters. The workpiece surface roughness was measured with a Talysurf CCI lite non-contact profiler. During this precision machining process, the arithmetical mean height () was less than 1 µm. The surface quality was examined also using scanning electron microscopy (SEM) and optical microscopy (OM). The experimental data were analyzed by means of Statistica to determine and graphically represent the relationships between the input and output parameters.
本文探讨了铝镍钴合金的电火花加工（EDM），重点研究关键工艺参数如何影响表面光洁度。实验使用BP93L电火花加工机床进行。采用Box-Behnken设计来研究三个因素，即火花电流、脉冲导通时间和脉冲关断时间，每个因素设置三个水平，对表面质量的影响。采用专门设计的系统，通过给工具施加额外的旋转运动和给工件施加额外的旋转运动来提高加工过程的效率。目的是有效去除侵蚀的金属颗粒并创建具有较小凹坑的表面。使用Talysurf CCI lite非接触轮廓仪测量工件表面粗糙度。在这个精密加工过程中，算术平均高度（）小于1µm。还使用扫描电子显微镜（SEM）和光学显微镜（OM）检查表面质量。通过Statistica对实验数据进行分析，以确定并以图形方式表示输入和输出参数之间的关系。
