功率超声珩磨磨削区单个空化泡动力特性的研究

摘要

空化效应是功率超声珩磨磨削区常见的物理现象,能够大幅提高超声珩磨的加工效率.建立了功率超声珩磨磨削区空化泡的动力学模型,采用4-5阶的Runge-Kutta方法,分析了空化泡的初始半径、超声频率、声压幅值、珩磨压力、珩磨头的回转速度对空化泡运动特性的影响.结果表明:超声波声压幅值与珩磨头的回转速度对磨削区空化泡运动特性影响较大,为进一步研究功率超声珩磨磨削区的空化效应提供了理论支持.%Cavitation effect can improve significantly processing efficiency of the ultrasonic honing,which happens in grinding zone of the power ultrasonic honing,is a common physical phenomena.The dynamic model of cavitation bubbles in the grinding zone of the power ultrasonic honing was established,with four-five levels of Runge-Kutta method.The effects of initial bubble radius,the frequency and pressure amplitude of the imposed ultrasonic field,honing pressure and the turning speed of honing head were numerically studied.It is shown that the amplitude of ultrasonic and the turning speed of honing head have greater effect than others.The results provide a theoretical support for cavitation effect in grinding zone of the power ultrasonic honing.