Impedance Modeling of Ultrasonic Transducers Used in Heavy Aluminum Wire Bonding

Long, Zhili; Zhang, Jianguo; Wu, Xiaojun; Liu, Yuecai; Zhou, Xing; Li, Zuohua

doi:10.1109/tcpmt.2018.2829164

Cited by 9 publications

(3 citation statements)

References 15 publications

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“…The wave speed of material varies with fasten force. When the longitudinal ultrasonic wave propagates in the uniform material and regular shape object, it is affected by the axial stress of object [30,31]. The relational expression is as follows: dcndσ=[2l+λ+(λ+μμ)(4m+4λ+10μ)]2cnρfalse(3λ+2μfalse) where λ and μ are Lamé or second-order elastic constants, l and m are Murnaghan’s third-order elastic constants, ρ is the material density, c n is wave speed, and σ is the compressive stress.…”

Section: Impedance Modelingmentioning

confidence: 99%

Electromechanical Dynamics Model of Ultrasonic Transducer in Ultrasonic Machining Based on Equivalent Circuit Approach

Zhang

Long

et al. 2019

Sensors

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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.

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Section: Impedance Modelingmentioning

confidence: 99%

Electromechanical Dynamics Model of Ultrasonic Transducer in Ultrasonic Machining Based on Equivalent Circuit Approach

Zhang

Long

et al. 2019

Sensors

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show abstract

“…This plays a vital role in the relevant applications of ultrasonic transducers. Nevertheless, specific impedance characteristics (capacitive, inductive, and resistive) of transducers when loads are applied have not been studied [ 22 ]. Based on the developed dynamic model, the effect of the thermo-mechanical load on the characteristics of the ultrasonic vibration system was researched, and the amplitude and frequency change is determined in a similar trend with the change in load.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Ultrasonic Machining Characteristics under Dynamic Load

Chen

Zhao

Chen

et al. 2022

Sensors

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This research focuses on the load characteristics of piezoelectric transducers in the process of longitudinal vibration ultrasonic welding. We are primarily interested in the impedance characteristics of the piezoelectric transducer during loading, which is studied by leveraging the equivalent circuit theory of piezoelectric transducers. Specifically, we propose a cross-value mapping method. This method can well map the load change in ultrasonic welding to the impedance change, aiming to obtain an equivalent model of impedance and load. The least-squares strategy is used for parameter identification during data fitting. Extensive simulations and physical experiments are conducted to verify the proposed model. As a result, we can empirically find that the result from our model agrees with the impedance characteristics from the real-life data measured by the impedance meter, indicating its potential for real practice in controller research and transducer design.

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“…UPS can achieve material formation and fabrication in a higher efficiency compared to the traditional process [8]. WB is an advanced technology of fine-pitch package for the microelectronics devices, where with a frequency higher than 55 kHz can achieve the bonding connections in a faster and greener manufacturing [9][10][11][12]. These examples show that the vibration amplitude of the PT is of great significance to promote the efficiency, quality and uniformity of the machining processes [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Impedance Modeling of Ultrasonic Transducers Used in Heavy Aluminum Wire Bonding

Cited by 9 publications

References 15 publications

Electromechanical Dynamics Model of Ultrasonic Transducer in Ultrasonic Machining Based on Equivalent Circuit Approach

Electromechanical Dynamics Model of Ultrasonic Transducer in Ultrasonic Machining Based on Equivalent Circuit Approach

Analysis of Ultrasonic Machining Characteristics under Dynamic Load

An automated monitoring strategy for ultrasonic amplitude prediction of piezoelectric transducer

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