English: Copper Needs a Sharp Edge and Controlled Chip Flow
Copper electrode CNC milling is different from steel machining because copper is ductile and can stick to the cutting edge. Built-up edge can damage fine electrode details, reduce surface finish and change dimensional accuracy. A sharp polished carbide end mill, proper feed per tooth and clean chip evacuation help keep copper cutting cleanly.
For EDM electrodes, surface quality matters because the machined electrode shape is transferred into the final mold cavity. Light finishing passes, stable toolpaths and low runout improve edge definition. Coolant or air strategy should be selected to remove chips without causing thermal or contamination problems in the process.
Practical process guidance
Avoid dull tools and rubbing conditions. If copper starts smearing instead of forming clean chips, increase effective cutting action, review flute polish and reduce chip recutting. Consistent tool pressure is essential for fine electrode features.
中文：铜电极 CNC 铣削如何减少积屑瘤
铜电极 CNC 铣削不同于钢件加工，因为铜材延展性强，容易粘附在切削刃上形成积屑瘤。积屑瘤会损伤精细电极结构，降低表面光洁度，并影响尺寸精度。锋利抛光的硬质合金铣刀、合理每齿进给和顺畅排屑，有助于保持稳定切削。
对于 EDM 电极，表面质量非常关键，因为电极形状会转移到最终模腔中。轻量精加工、稳定刀路和低跳动可以提升边缘清晰度。冷却或气冷策略应以排屑为核心，避免切屑二次切削。
Français : Fraisage CNC des électrodes cuivre
Le cuivre peut adhérer à l’arête de coupe et créer une arête rapportée. Une fraise carbure très vive, des goujures polies et une bonne évacuation des copeaux améliorent l’état de surface des électrodes EDM.
Русский: CNC-фрезерование медных электродов
Медь вязкая и может налипать на режущую кромку. Для чистой обработки электродов EDM нужны острая твердосплавная фреза, полированные канавки, стабильная подача и хороший отвод стружки.
