Optimisation of a Cymbal Transducer for its use as Driver of a High-Power Ultrasonic Cutting Device for Bone Surgery

Bejarano, F., Feeney, A. and Lucas, M. (2012) Optimisation of a Cymbal Transducer for its use as Driver of a High-Power Ultrasonic Cutting Device for Bone Surgery. In: 41st UIA Symposium, San Francisco, CA, USA, 16-18 Apr 2012,

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The Class V flextensional ‘cymbal’ transducer is a suitable device for low-power ultrasonic applications that possesses high piezoelectric coefficients, high vibrational displacement and acceleration sensitivity at low frequencies and easiness of tailoring the desired properties by the choice of the end-cap and driver materials and geometries with cost effective manufacturing. Due to its geometry, the cymbal transducer has one significant parameter which restricts the operational range 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 high stresses in the bonding layer can lead to a subsequent de-bonding. This would render the cymbal transducer inefficient for high-power ultrasonic applications. In this paper several experimental analyses have been performed, complemented by the use of ABAQUS FEA software, in order to develop a high-power ultrasonic cutting device for bone surgery using a new configuration of cymbal transducer optimized for its use at high displacement and high input power intensities. This new transducer uses a combination of a piezoceramic disc with a metal ring as the driver, thereby increasing the mechanical coupling with the metal end-cap.

Item Type:Conference Proceedings
Glasgow Author(s) Enlighten ID:Feeney, Dr Andrew and Bejarano, Mr Fernando and Lucas, Professor Margaret
Authors: Bejarano, F., Feeney, A., and Lucas, M.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
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