【摘要】 超声纵振螺旋铣削工艺可以显著提高加工质量，然而其复杂运动学关系会导致已加工表面产生较之于传统螺旋铣削更为复杂的形貌。为了对这一工艺生成的孔内壁加工表面进行形貌预测和规律提炼，本文提出了超声纵振螺旋铣削的表面形貌预测模型及其可视化方法，并设计了验证试验，对波浪纹织构、尖峰、分割层3类典型表面特征进行对比，发现仿真和试验的吻合度良好。随后，本文利用该模型评估了振幅、转速、公转进给和切向进给对表面形貌的影响。研究结果表明，超声振动的振幅导致侧壁形成的波浪纹形貌，且主轴转速的增大导致了波浪纹织构变得稀疏。此外，切向每齿进给、每公转轴向进给和公转进给速度分别决定了斜向尖峰带的高度、分割层的间距和形貌的凸起高度。更多还原

【Abstract】 Ultrasonic longitudinal vibration assisted helical milling(ULVAHM) can significantly improve the machining quality. However, the complex kinematics can result in a more complex morphology of the surface machined by ULVAHM than that by a conventional helical milling. To predict the morphology and summarize the rules of the machined surface generated by ULVAHM, a morphology prediction model and its visualization method were proposed in this study, and a verification experiment was conducted to compare the three typical microscopic characteristics, namely,wave texture, sharp-like peak and segmented layer. A favorable agreement between experimental and simulation results was demonstrated. Afterwards, the effects of amplitude, rotational speed, revolution feed and tangential feed on the surface morphology were evaluated by using the model. The investigation results show that the amplitude in ultrasonic vibration leads to the formation of wavy patterns on sidewalls. As the spindle speed increases, the wavy pattern weave becomes sparser. Meanwhile, the height of oblique crest band, the spacing of split layers, and the height of shaped projection are determined by the circumferential feed per tooth, axial feed per tooth, and feed speed, respectively.更多还原