Helical milling (HM), axial ultrasonic vibration helical milling (A-UVHM) and longitudinal and torsional ultrasonic vibration helical milling (LT-UVHM) were developed for hole-making of Carbon Fiber Reinforced Plastic (CFRP) composites. Cutting trajectory, cutting speed, acceleration and effective rake angle of peripheral edge in HM and UVHM processes were modeled. Compared with HM, axial forces with UVHM processes were reduced by 9.0 %–35.7 %. The burrs at entrance and exit with UVHM were also reduced. In A-UVHM and LT-UVHM processes, an effect of shear with variable direction which is good to fracture fibers was presented, according to the relative movement of peripheral edge and fibers. Additionally, the variations of cutting speed and acceleration in A-UVHM and LT-UVHM are also helpful to fracture fibers, due to the wide range of speed and impact effect. Smooth surface with regular fiber fracture morphology and tiny fragments was generated in UVHM due to the effect of shear along variable direction. Compared with HM, the maximum effective rake angle of peripheral edge in UVHM was increased by 112.1 %–192.6 %, which is helpful to fracture fibers by sharper cutting edge.

开发了螺旋铣削（HM），轴向超声振动螺旋铣削（A-UVHM）以及纵向和扭转超声振动螺旋铣削（LT-UVHM），用于碳纤维增强塑料（CFRP）复合材料的孔加工。对HM和UVHM工艺中的切削轨迹，切削速度，加速度和外围边缘的有效前角进行了建模。与HM相比，UVHM工艺的轴向力降低了9.0％–35.7％。UVHM在入口和出口的毛刺也减少了。在A-UVHM和LT-UVHM工艺中，根据外围边缘和纤维的相对运动，提出了具有可变方向的剪切作用，该剪切作用对纤维断裂有很好的效果。此外，A-UVHM和LT-UVHM中切割速度和加速度的变化也有助于纤维断裂，由于速度和冲击效果范围广。由于沿可变方向的剪切作用，在UVHM中产生了具有规则的纤维断裂形态和细小碎片的光滑表面。与HM相比，UVHM的最大外边缘有效前角增加了112.1％–192.6％，这有助于通过更锋利的切削刃使纤维断裂。