功率超声珩磨磨削区椭球状空化泡动力学模型及数值模拟  

Dynamic Model and Numerical Simulation of Elliptical-type Cavitation Bubble in Grinding Zone of the Power Ultrasonic Honing

作　　者：王建青[1] 祝锡晶[1] 郭策[1] 

机构地区：[1]中北大学山西省先进制造技术重点实验室,太原030051

出　　处：《机械设计与研究》2015年第5期109-112,共4页Machine Design And Research

基　　金：国家自然科学基金(51275490);山西省自然科学基金(2013011024-5)资助项目

摘　　要：超声空化效应直接影响功率超声珩磨工件的表面质量、珩磨效率以及加工稳定性。基于能量平衡原理建立了磨削区椭球状空化泡动力学模型,采用MATLAB软件进行了数值模拟。从模拟结果可知:当不考虑液体介质的粘滞阻尼、时间滞后等因素时,单个椭球状空化泡动力学规律与球状空化泡类似,表现为类似于稳态空化的过程;珩磨压力、油石转速等磨削区特有的加工环境对近椭球状空化泡的生长和压溃影响较大。在数值模拟的基础上又进行了相应试验研究,证实油石表面超声空化泡的存在及功率超声振动珩磨磨削区的超声空化效应受到油石表面三维微观形貌影响。Ultrasonic cavitation in grinding zone of the power ultrasonic honing directly affects surface quality, efficiency and honing process stability. Based on energy balance principle, the dynamics model of elliptical-type cavitation bubble in the grinding zone is established and simulated by using MATLAB software in this paper. The results are when the viscous damping of liquid medium, the time lag and other factors are not considered, the dynamic characteristic of a single elliptical-type cavitation bubble is similar with spherical bubble, which shows the performance of similar stable cavitation process ; and the specific processing environment in whetstone grinding zone, such as honing pressure, speed, etc, has a great influence on the growth and crushing of elliptical-type cavitation bubble. Based on the numerical simulation, the corresponding experience is studied. The results indicate that the cavitation bubbles on the whetstone surface is existent and ultrasonic cavitation in grinding zone of the power uhrasonicvibration honing is impacted by the 3D surface microcosmic topography of whetstone.

关 键 词：功率超声珩磨 椭球状空化泡 动力学模型 数值模拟 

分 类 号：TH16[机械工程—机械制造及自动化]