English: Case Overview
This hypothetical copper alloy heat sink drawing includes thin fins, a flat base, mounting holes and a cosmetic surface requirement. Copper is ductile, so tool sharpness and chip control are central to the CNC tooling solution. The wrong cutter can smear the surface, create built-up edge and bend delicate fins.
A practical tool plan may use a PCD cutter or polished carbide end mill for finishing, a sharp carbide end mill for slotting between fins, carbide drills for mounting holes and a small chamfer tool for edge breaks. The fixture should support the base evenly so flatness is not lost during fin machining.
Process Plan
Rough the heat sink outline first, then machine fin gaps with a sharp tool and controlled chip evacuation. Leave the base finishing pass until after the fin structure is stable. Avoid excessive side pressure on thin fins, and inspect flatness after unclamping.
Machining Takeaway
For copper heat sink machining, a good drawing-based tooling plan protects both thermal surface quality and thin-fin geometry. Sharp tools and stable support are the core of the solution.
中文：铜合金散热板 CNC 加工方案案例
这个假设铜合金散热板图纸包含薄散热片、平面底面、安装孔和外观表面要求。铜材延展性强，因此刀具锋利度和排屑控制是配刀方案核心。刀具选择不当容易造成表面涂抹、积屑瘤和薄片变形。
实用方案可以使用 PCD 刀具或抛光硬质合金铣刀进行精加工，用锋利小径铣刀加工散热片间槽，用硬质合金钻头加工安装孔，并用小倒角刀处理边缘。夹具应均匀支撑底面，避免薄片加工后平面度失控。
Français : Cas d’usinage d’un dissipateur cuivre
Un dissipateur en cuivre exige des outils très vifs, une bonne évacuation des copeaux et un support stable. Les ailettes fines doivent être usinées avec une faible pression latérale pour préserver la géométrie.
Русский: CNC-обработка медного радиатора
Медный радиатор с тонкими ребрами требует острого инструмента, хорошего отвода стружки и равномерной поддержки основания. Это помогает сохранить плоскостность и качество поверхности.
FAQ
Why use PCD for copper heat sink finishing? PCD or polished carbide can reduce built-up edge and maintain a clean surface.
What is the main risk with thin fins? Side pressure can bend fins, so toolpath and fixture support must be controlled.
Related reading: Copper Electrode CNC Milling and PCD Tools for Aluminum CNC Milling.
