Abstract
Ultrasonic transducer is a piezoelectric actuator that converts AC electrical energy into ultrasonic mechanical vibration to accelerate the material removal rate of workpiece in rotary ultrasonic machining (RUM). In this study, an impedance model of the ultrasonic transducer is established by the electromechanical equivalent approach. The impedance model not only facilitates the structure design of the ultrasonic transducer, but also predicts the effects of different mechanical structural dimensions on the impedance characteristics of the ultrasonic transducer. Moreover, the effects of extension length of the machining tool and the tightening torque of the clamping nut on the impedance characteristics of the ultrasonic transducer are investigated. Finally, through experimental analysis, the impedance transfer function with external force is established to analyze the dynamic characteristics of machining process.
Highlights
Super hard materials have been applied in many fields, including medical, electronic product, industry equipment, and aeronautic technology fields [1,2,3]
The contributions of this paper are: (1) We investigate the whole electromechanical characteristics of ultrasonic transducer by using the equivalent circuit to describe the lumped static impedance/admittance characteristic of ultrasonic transducer, (2) The ultrasonic piezoelectrical transducer is sensitive to the external mechanical load [25]
The electromechanical equivalent method is an effective way to deal with ultrasonic transducer design [22,29]
Summary
Super hard materials have been applied in many fields, including medical, electronic product, industry equipment, and aeronautic technology fields [1,2,3]. The effects of tightness of clamping nut and extension length of machining tool, and the dynamical impedance model with different loads in numerical calculation were not mentioned. The contributions of this paper are: (1) We investigate the whole electromechanical characteristics of ultrasonic transducer by using the equivalent circuit to describe the lumped static impedance/admittance characteristic of ultrasonic transducer, (2) The ultrasonic piezoelectrical transducer is sensitive to the external mechanical load [25]. The resonant frequency anddifferent impedance can beneficialby to dynamical impedance function of ultrasonic transducer with loads is be established theparameter monitoring of machining process.this. 3, the impedance equivalent methodplatform is applied verify the effect of clamping nut and machining tool extended length.
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