English: Drawing Review and Process Target
This CNC case study focuses on a PEEK fluid manifold with deep intersecting ports, O-ring grooves, threaded inserts and a flat sealing face. The example drawing calls for burr-free internal intersections, 0.05 mm groove width control, smooth sealing surfaces and thread quality suitable for repeated assembly. PEEK is much softer than metal, but it is easy to damage with heat, clamping pressure and dull tools.
The manufacturing objective is to keep the material cutting cleanly while avoiding melting, fuzzing and hidden burrs inside cross ports. A good process balances sharp tooling, low clamping stress, chip evacuation and inspection methods that can see into the internal flow path.
Fixture and Datum Strategy
Use broad, clean support under the sealing face and avoid point loading near thin walls. Vacuum support can work for broad plates, but a manifold with open ports often needs a soft-jaw nest or a machined pocket fixture. The fixture should locate from stable outside datums and leave the sealing face accessible for a light final pass.
Because PEEK can creep under pressure, clamp force should be documented and repeatable. Let the part return to room temperature before final inspection if machining heat is measurable. A short stabilization step often explains why a part changes size after leaving the machine.
Tooling Plan
| Feature | Suggested tool | Reason |
|---|---|---|
| Sealing face | Sharp polished face mill or single-flute fly cutter | Creates a clean surface with low heat |
| Deep ports | Polished carbide drill with coolant or air evacuation | Prevents chip packing and heat buildup |
| Intersecting holes | Small ball end mill or deburring tool on a programmed path | Removes internal burrs consistently |
| O-ring grooves | Sharp grooving tool with radius control | Maintains groove width and bottom finish |
| Threads | Thread mill or sharp form tap when suitable | Controls burrs and reduces scrap risk |
Starting Cutting Parameters
For a 6 mm polished carbide end mill in PEEK, trial speeds around 250-500 m/min and 0.04-0.10 mm per tooth are reasonable when chip evacuation is strong. Drilling should prioritize sharp edges and chip removal over aggressive feed. If the chip becomes stringy or smeared, reduce heat generation, improve evacuation and confirm that the tool is cutting rather than rubbing.
Operation Sequence and Inspection
- Confirm material grade, annealing condition and moisture handling requirements.
- Machine broad datums with light, sharp cuts.
- Drill deep ports with chip evacuation checks before full-depth production.
- Machine cross ports and remove internal burrs using a controlled toolpath.
- Finish O-ring grooves after the main porting operation.
- Finish the sealing face with minimum heat input.
- Inspect groove width, port intersections, thread quality, flatness and surface finish.
The SEO focus is PEEK fluid manifold CNC machining, deep ports, O-ring grooves and burr-free threads. The terms are included where they help buyers and engineers understand the process capability.
中文：PEEK 流体歧管加工方案
本案例针对 PEEK 流体歧管，特征包括深孔、交叉流道、O 形圈槽、螺纹和密封平面。PEEK 虽然切削力低，但容易因热量、夹紧压力和钝刀产生熔边、拉毛和内部毛刺。加工方案应以锋利刀具、低夹紧应力、稳定排屑和可验证的去毛刺为核心。
夹具应提供大面积支撑，避免在薄壁和密封面附近点压。深孔加工要持续排屑，交叉孔处使用程序化去毛刺路径，O 形圈槽最后精加工以保证槽宽和底面质量。检测重点包括槽宽、流道交叉处毛刺、螺纹质量、平面度和表面粗糙度。
Español: colector de fluido PEEK
Este caso CNC cubre un colector de PEEK con puertos profundos, intersecciones internas, ranuras para O-ring y roscas. La clave es usar herramientas muy afiladas, baja presion de sujecion y buena evacuacion de viruta para evitar rebabas, material fundido y deformacion.
Français : collecteur de fluide PEEK
Ce cas CNC concerne un collecteur en PEEK avec ports profonds, intersections internes, gorges de joint torique et filetages. Les outils doivent etre tres affutes, le bridage doit rester faible et l evacuation des copeaux doit etre stable afin d eviter bavures et echauffement.
Русский: коллектор PEEK
В этом примере рассматривается ЧПУ обработка коллектора из PEEK с глубокими каналами, пересечениями, канавками под O-ring и резьбами. Основная задача – острый инструмент, малое усилие зажима, хороший отвод стружки и контролируемое удаление внутренних заусенцев.
FAQ
Why is PEEK still difficult if cutting force is low?
Heat and clamping pressure can deform the part or smear the material, especially around sealing features.
How should internal burrs be controlled?
Plan tool access for intersections, use programmed deburring where possible and verify with borescopes or suitable inspection methods.
Related reading: Burr Control in Thin-Wall CNC Milling and CNC Thread Milling.
