Study On Surface Mechanism Of ZTA In The Ultrasonic Vibration Assisted Grinding

Ultrasonic vibration assisted grinding(UAG)is one of the methods machining ZTA materials,owns important significance in theory and a capacious development foreground.Among them,the axia ultrasonic-assisted grinding(AUAG),due to its particular cutting path,has specific advantages in increasing the material rate,surface quality and reducing the grinding force.The acoustic systems were calculated and designed on the basis of the wave theory,and optimize the size to meet the resonant frequency using ANSYS finite element method,then vibration performances of deviced were obtained by experiments.Establishing particle kinematics equation of ultrasonic vibration assisted grinding for single abrasive,and the simulation of abrasive in Cutting trajectory?relative velocity and accelerated velocity.The results show that amplitude and frequency affects the cutting trajectory for length and width,abrasive grinding track sine curve in the space;With the increase of amplitude and frequency,a great influence on the size of the relative velocity and acceleration direction;On this basis,grinding surface of different frequencies is studied through experiment,and show that ultrasonic vibration assisted grinding surface quality is better in 35kHz.Cutting deformation force model of grinding has been achieved by establishing the relations between thickness of under formed debris and grinding force,through the introduction of unit grinding force.The mathematics model of the friction coefficient also has been given according to grinding ability parameter Cge,which shows that the friction coefficient was mostly reduced in the 35kHz UAG;the grinding force increase with grinding depth,while the increase of the vibration frequency led to a decrease of the grinding force;the reducing rate of cutting deformation force are lower in three frequencies,it was mostly reduced in the 35kHz UAG.In order to further study the mechanism of ultrasonic vibration on the grinding surface,according to establish g single abrasive particle kinematics equation the based on two-dimensional ultrasonic vibration grinding,and a simulation was carried out,it turned out that the form of grinding confirms the impact cutting ?pulse ultrasonic vibration softening effect and extend the life of the grinding wheel...