【摘要】 旋转超声加工是加工硬脆材料的一种较好方法。为实现长时间连续稳定工作,必须使用厚电极的超声换能器振子。目前,对厚电极换能器振子的研究较少,使用时一般采用近似计算与试验调整相结合的方法。为精确设计厚电极换能器振子,推导了单个厚电极换能器振子的频率方程,并使用模态试验分析和有限元仿真相结合的方法进行了验证,结果表明:在给定的电极厚度范围内,换能器振子的谐振频率误差小于5％,完全满足工程应用的需要。更多还原

【Abstract】 Rotary ultrasonic machining is an effective way for machining hard and fragile materials. In order to keep the ma-chining reliable longer, thick electrode ultrasonic transducer should be used. Now relevant study is fewer. If needed, thick ultrasonic transducer is designed by both approximate calcula-tion and test adjustment. In order to design the precise trans-ducer, frequency equation of one-thick electrode ultrasonic transducer is induced.In order to verify the equation, both mo-dal experiments and FEM are used, and the results show that: within the given thickness range of electrode, resonance fre-quency error is less than 5%, and the frequency can meet the engineering requirement.更多还原