We investigate a recently introduced methodology for 5-axis flank computer numerically controlled (CNC) machining, called double-flank milling (Bo et al., 2020). We show that screw rotors are well suited for this manufacturing approach where the milling tool possesses tangential contact with the material block on two sides, yielding a more efficient variant of traditional flank milling. While the tool’s motion is determined as a helical motion, the shape of the tool and its orientation with respect to the helical axis are unknowns in our optimization-based approach. We demonstrate our approach on several rotor benchmark examples where the pairs of envelopes of a custom-shaped tool meet high machining accuracy.

我们研究了一种最近引入的用于5轴侧面计算机数控（CNC）加工的方法，称为双侧面铣削（Bo et al。，2020）。我们证明了螺杆转子非常适合这种制造方法，在这种制造方法中，铣削刀具与材料块的两侧相切，从而产生了传统侧面铣削的更有效变体。虽然将工具的运动确定为螺旋运动，但是在我们基于优化的方法中，工具的形状及其相对于螺旋轴的方向是未知的。我们在几个转子基准示例上演示了我们的方法，在这些示例中，定制形状工具的一对包络线对具有很高的加工精度。