Optimisation of a Cymbal Transducer for Its Use in a High-power Ultrasonic Cutting Device for Bone Surgery
Optimisation of a Cymbal Transducer for Its Use in a High-power Ultrasonic Cutting Device for Bone Surgery
复制标题
骨外科高功率超声切割装置中铙钹换能器的优化
DOI：
10.1016/j.phpro.2016.12.007
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Bejarano F
中科院分区：
文献类型：
--
作者：
Bejarano F
ClassV Cymbal是一种通常用于低功率超声波应用的伸缩换能器。换能器的谐振频率可以通过端盖和驱动器材料的选择以及端盖的尺寸来定制。Cymbal换能器有一个很大的限制，它限制了设备的工作振动幅度。这是金属端盖和压电陶瓷驱动器之间的粘结剂的机械强度施加的极限。因此，当输入功率或位移增加时，粘结层中的应力可能会导致剥离，从而使Cymbal换能器在高功率超声波应用中无效。本文以ABAQUS/CAE有限元分析软件为补充，进行了多项实验分析，旨在研制一种采用新型Cymbal换能器的高功率骨外科超声切割装置，该装置最适合在大位移和高输入功率下工作。这种新型换能器采用压电盘和金属环的组合作为驱动器，从而改善了与金属端盖的机械耦合。
The class V cymbal is a flextensional transducer commonly used in low-power ultrasonic applications. The resonance frequency of the transducer can be tailored by the choice of end-cap and driver materials, and the dimensions of the end-caps. The cymbal transducer has one significant limitation which restricts the operational vibration amplitude of the device. This is the limit imposed by the mechanical strength of the bonding agent between the metal end-cap and the piezoceramic driver. Therefore, when there is an increase in the input power or displacement, the stresses in the bonding layer can lead to debonding, thereby rendering the cymbal transducer ineffective for high-power ultrasonic applications. In this paper, several experimental analyses have been performed, complemented by the use of Abaqus/CAE finite element analysis, in order to develop a high-power ultrasonic cutting device for bone surgery using a new configuration of cymbal transducer, which is optimised for operation at high displacement and high input power. This new transducer uses a combination of a piezoceramic disc with a metal ring as the driver, thereby improving the mechanical coupling with the metal end-cap.