中文摘要：

以金属切削原理和超声振动加工的冲击特性为基础,根据流体动压理论和摩擦学原理,建立刀具与工件间的简单几何模型.推导简单动压几何模型下前后刀面的动压方程,分析动压油膜对刀具和工件加工表面的影响.研究超声振动加工下周期性断续微观切削碳纤维复合材料的动压作用机理,阐述了刀具磨损后继续再加工危害的原因.在超声振动加工碳纤维过程中形成的动压油膜,能改善三个变形区的状态,可以减少刀具磨损,提高加工效率和表面质量.

英文摘要：

On the basis of the metal cutting theory and impact characteristics of ultrasonic vibration cutting, a simple geometric model between the tool and the workpiece is built according to the hydrodynamic lubrication theory and the tribology principle. The hydrodynamic pressure equations of rake face and flank face is derived through the simple model, and the influences of the hydrodynamic pressure oil film on the surface of the machined workpiece and tool are analyzed. The hydrodynamic pressure mechanism of periodic intermittent micro cutting process under the ultrasonic vibration machining carbon fiber and the causes of harms about the continue processing after tool wear are researched. The hydrodynamic pressure oil film formed in the process of ultrasonic vibration cutting carbon fiber reinforced plastics can improve the state of the three deformation zone, reduce tool wear, and improve the processing efficiency and surface quality of workpiece.