【作者】 沈剑云； 陈剑彬； 王江全； 徐西鹏；

【Author】 SHEN Jianyun;CHEN Jianbin;WANG Jiangquan;XU Xipeng;College of Mechanical Engineering & Automation,Huaqiao University;

【机构】 华侨大学机电及自动化学院；

【摘要】 超声加工为硬脆性材料零件制造提供了一种高效精密加工方式,随着对超声加工研究的不断深入,超声辅助加工的形式也越来越多,本文提出一种结合径向超声振动辅助超薄金刚石锯片进行光学玻璃材料锯切的研究。首先利用Pro/E建模与有限元分析手段,对采用二级变幅杆来实现超声振动方向的轴-径向转变进行了设计和仿真,完成了径向超声振动锯切装置的设计制造,并利用该装置,进行了光学玻璃的锯切实验,探索径向超声振动中单颗磨粒最大切削厚度对锯切过程机理的影响,实验结果表明在超声锯切过程中,单颗磨粒最大切削厚度对光学玻璃锯切比能的影响并不显著,而传统锯切方式中锯切比能随之增大而减小,这与光学玻璃材料在锯切过程中的材料去除方式有着一定关系,超声锯切过程中材料更多以脆性断裂方式去除,同时,超声振动在锯切过程中减少了金刚石锯片与工件间的摩擦,从而降低其能耗。更多还原

【Abstract】 Ultrasonic assisted machining has provided an efficient way for the precision machining of hard-brittle material components.With the widely study of ultrasonic machining,the form of ultrasonic assisted machining is also increasing.A study on combination of radial ultrasonic vibration and thin diamond sawing blade to saw optical glass material was presented in this study.Firstly,with Pro/E modeling and finite element analysis,two stage ultrasonic vibration horn that can realize the direction of axisradial transition was designed and simulated.After designed and manufactured the device of ultrasonic vibration sawing,which was used to saw optical glass to study the effect of single grain maximum cutting thickness on sawing mechanism.The result shows that,during the process of ultrasonic sawing,the single grain maximum cutting thickness did not have evident effect on specific sawing energy.But it decreased with the single grain maximum cutting thickness increased during traditional sawing process.It means that there is a certain relationship between the result and the material removal way of sawing optical glass.The material is mostly removed with brittle fracture mode in ultrasonic sawing;while the ultrasonic vibration reduces friction between the diamond saw blade and the workpiece in the sawing process,thereby reducing its energy consumption.更多还原