微织构阵列离散陶瓷材料旋转超声加工机理与工艺研究

Study on Mechanism and Technology of Rotary Ultrasonic Machining of Ceramic Materials Discretized by Micro-textured Arrays

提出离散化旋转超声加工新工艺思想,研究了材料性质与结构改变后,离散化氧化铝陶瓷超声加工机理与工艺规律,分析了加工表面质量,探讨了材料去除机理与工艺策略;优选工艺参数,进行了典型部件的加工应用。研究发现,离散化有利于弱化机械抗力和刀具延寿,可增大切削宽度、切削深度、进给速度等工艺参量,显著提高材料去除率;调控工艺参数,融合离散化高效加工与铣磨精加工,为改善硬脆性难加工材料典型部件的加工效果提供了一种新的思路。

In this paper,an innovative technology idea of discrete rotary ultrasonic machining is proposed.The removal mechanism and process law of ultrasonic machining for alumina ceramics after material properties and structure changes are studied.The surface quality is analyzed.The mechanism and process strategy of crack initiation and propagation are discussed.The processing parameters are optimized and the actual samples are processed and verified.Discrete processing can significantly improve processing efficiency,increase process parameters such as cutting width,cutting depth and feed speed,and increase material removal rate.When regulating process parameters,the processing effect of typical parts of hard and brittle hard-to-machine materials could be improved by combining with discrete high-efficiency processing and milling and finishing process.