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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,使用时一般使用近似计算与实验调整相结合的方法。为了较精确地设计厚电极超声换能器振子,类比薄电极换能器振子的研究方法,推导了单个厚电极节面在能器振子中间时的频率方程,并使用模态实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。
Rotary ultrasonic machining is a good way to process hard and brittle materials. In order to achieve long-term continuous and stable work, you must use the thick electrode ultrasonic transducer vibrator. At present, there are few researches on the transducers of thick electrode transducers. In general, the method of combining approximate calculation with experimental adjustment is used. In order to design a thick electrode ultrasonic transducer vibrator more accurately and analogously to the research method of the thin electrode transducer vibrator, the frequency equation of a single thick electrode section in the middle of the transducer is deduced. The modal experimental analysis and the finite element method The simulation results show that the resonance frequency error of the transducers is less than 5% for a given thickness of the electrode, which fully meets the needs of engineering application.