超声振动磨削陶瓷材料高效去除机理研究

基于压痕断裂力学,在工件横向施振超声振动平面磨削单颗磨粒受力分析基础上,建立了材料去除率综合数学模型;并就超声振动和普通磨削进行了对比试验研究。研究结果表明超声振动磨削陶瓷材料去除率与被加工材料的种类、磨削深度、砂轮磨粒粒度、超声振动的振幅以及磨削条件有着密切关系。同样磨削条件下,超声振动磨削陶瓷材料去除率是普通磨削的1.7~3.2倍,与理论模型相符合。试验结果表明超声振动磨削可以获得良好的加工表面,工件横向施振超声振动磨削是一种精密、高效加工新工艺。

Study on the Mechanism of Material Removal of Ultrasonic Vibration Grinding of Ceramic

The authors contrived a new grinding method in which the workpiece's ultrasonic vibration direction is vertical to the peripheral speed of the wheel. Based on the grain movement model of the ultrasonic grinding vibration direction vertical to the speed of wheel, a new theoretical model of the material removal rate in work lateral ultrasonic grinding is proposed. Mechanism of high efficiency material removal in work lateral ultrasonic vibration grinding (lateral WUVG) was analyzed. The effects on the material removal rate and the surface roughness of the vibration amplitude, the static load applied and the size of abrasive are measured. It has been concluded that any increase in the amount of work imparted to the machined ceramics, the static load applied and the grit size of the abrasive will result in an increase in the material removal rate and roughening of the grinding surface. The study showed that ultrasonic vibration grinding is a precision and highly efficient method for machining of ceramic composites.