Die-sinking electrical discharge machining is an unconventional technology that allows to machine all at least minimally electrically conductive materials regardless of their physical and mechanical properties. Despite the fact that it is not a conventional technology, the tool gets also worn out, which is a tool electrode. The wear of the electrode does not only mean its loss but also the degradation of the shapes that are transferred to the resulting workpiece. For this reason, a design of experiments was conducted with 6 input factors, 2 were categorical: the electrode material (copper, graphite) and workpiece material (steel 1.2363 and steel 1.2343ESR) and 4 were numerical: Open-voltage, Pulse current, Pulse on-time, and Pulse off-time. In the framework of this design of experiments, the wear of the used graphite and copper electrodes at their corners and edges was evaluated, which was made possible by the use of electron microscopy and the use of approximation circles. Furthermore, the eroding speed, the topography of the machined samples, and the morphology of the surfaces of the used electrodes were investigated. It has been recognized that the use of a graphite electrode will allow for more accurate workpiece shapes and less wear.

冲模放电加工是一种非常规的技术，无论其物理和机械性能如何，它都可以加工所有至少最低限度的导电材料。尽管不是传统技术，但工具还是磨损了，它是工具电极。电极的磨损不仅意味着其损耗，而且还意味着转移到最终工件上的形状的劣化。因此，进行了6个输入因子的实验设计，其中2个是分类的：电极材料（铜，石墨）和工件材料（钢1.2363和1.2343ESR），而4个是数字：开路电压，脉冲电流，脉冲开启时间和脉冲关闭时间。在这种实验设计的框架中，评估了用过的石墨电极和铜电极在其角和边缘的磨损，这可以通过使用电子显微镜和近似圆来实现。此外，还研究了腐蚀速度，加工样品的形貌以及所用电极表面的形貌。已经认识到，使用石墨电极将允许更精确的工件形状和更少的磨损。