This article introduces a means of NC program about rough cut of helicoid base on helix-milling.The means can improve efficiency of cutting, reduce the cutting abrasion, depress the operating costs.

• 基于螺旋线数控铣削的螺旋曲面粗加工的方法可大大提高加工效率,减少刀具磨损,降低加工成本。