旋转超声加工过程的仿真及实验  

Rotary Ultrasonic Machining Processing Simulation and Experimental Research

作　　者：唐勇军[1] 陈猛[1] 陈春沐[1] 张永俊[1] 

机构地区：[1]广东工业大学机电工程学院,广州510006

出　　处：《振动．测试与诊断》2013年第S1期15-17,215,共4页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(51275097);广州市科技计划资助项目(2009Z2-D611);番禺区科技计划资助项目(2008-Z-43-1)

摘　　要：运用动力学有限元软件LS-DYNA建立了旋转振动冲击工件的模型,以最大主应力为断裂准则,应用生死单元方法仿真工件加工的材料去除过程以及表面应力分布。针对旋转超声加工过程中出现的入口崩边现象设计了实验,研究主轴纵向进给速度和转速对崩边大小的影响,获得了减少崩边现象的加工工艺参数。实验结果表明,工件在主轴转速为1 kr/min时崩边的半径最小。主轴在固定转速的条件下,随着轴向进给速度的增加,孔的崩边范围逐渐增大,最大崩边的面积也相应增大。A rotary vibration impacting on the workpiece model, based on the fracture criterion of maximum normal stress and birth-death element, is developed to study the workpiece material removal process and its surface stress distribution. The experiments related to the entrance edge chipping are used to investigate the effects of two parameters(axial feedrate and spindle speed) on edge chipping.Experiment results show that, the radius of edge chipping is the minimum when the spindle speed is 1 kr/min. When the spindle speed is constant, the region and the biggest area of the edge chipping increase with the axial federate increasing.

关 键 词：旋转超声加工 硬脆材料 有限元仿真 崩边现象 

分 类 号：TG663[金属学及工艺—金属切削加工及机床]