English: Helical Interpolation Turns an End Mill into a Flexible Hole-Making Tool
Helical interpolation allows a CNC machine to create holes by moving a carbide end mill in a circular path while feeding downward. Compared with drilling only, this method can produce different hole sizes with one tool and improve control over bore diameter. It is useful for prototype machining, small batches and parts where tool change time matters.
The process requires a rigid setup and a suitable end mill. Tool deflection, chip evacuation and entry angle all affect bore quality. A stable ramp angle helps the cutter enter the material without sudden overload. For tight tolerances, a light finishing circle can improve size accuracy and surface finish.
Best-practice checks
Measure the finished bore, inspect roundness and confirm that chips are leaving the cut. If the bore is tapered or oversized, review tool runout, radial engagement and compensation values. Helical interpolation works best when cutting pressure is predictable.
中文：CNC 螺旋插补铣孔的应用要点
螺旋插补可以让 CNC 机床通过圆弧路径和向下进给，用硬质合金铣刀加工孔。相比单纯钻孔，这种方法可以用一把刀加工不同孔径，并更容易控制孔径尺寸，适合样件、小批量和需要减少换刀的零件。
螺旋插补需要刚性装夹和合适铣刀。刀具挠曲、排屑和进刀角度都会影响孔壁质量。稳定的斜坡角可以减少突然过载，最后增加轻量精加工圆弧，有助于提高尺寸精度和表面质量。
Français : Interpolation hélicoïdale en fraisage CNC
L’interpolation hélicoïdale permet d’usiner des trous avec une fraise carbure en combinant mouvement circulaire et descente axiale. Elle offre de la flexibilité pour différents diamètres et améliore le contrôle de l’alésage lorsque la machine et le montage sont rigides.
Русский: Винтовая интерполяция при CNC-фрезеровании отверстий
Винтовая интерполяция позволяет обрабатывать отверстия твердосплавной фрезой по круговой траектории с осевой подачей. Метод удобен для разных диаметров, малых партий и точного контроля размера отверстия.
