Influence of force load on the stability of ultrasonic longitudinal–torsional composite drilling system

Zhao, Bo; Chang, Baoqi; Yuan, Lusheng; Li, Pengtao

doi:10.1007/s00170-019-04654-6

Cited by 13 publications

(6 citation statements)

References 15 publications

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“…After the load increases, the original no-load model does not reflect the actual situation of the system well, and the stability of the designed controller is poor. When ultrasonic-assisted vibration is subjected to a force load, the problems of system detuning and amplitude attenuation will occur [ 14 ]. This leads to the wear of the transducer tool head, which has a significant impact on ultrasonic welding, so it is necessary to study the load characteristics of the transducer.…”

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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Section: Introductionmentioning

confidence: 99%

Analysis of Ultrasonic Machining Characteristics under Dynamic Load

Chen

Zhao

Chen

et al. 2022

Sensors

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“…Titanium alloys forming and processing is extremely di cult because its high strength and high speci c stiffness leading to tool wear and irregular material removal phenomenon. Irregular material removal will lead to increased surface roughness and processing defects, which will eventually lead to surface cracks and workpiece failure [9][10][11]. Therefore, reducing the processing defects and improving the uniformity of material removal is vital to improve machining performance and extend the service life of the workpiece for di cult-to-process materials.…”

Section: Introductionmentioning

confidence: 99%

Surface feature and material removal in ultrasonic vibration-assisted slot-milling of Ti–6Al–4 V titanium alloy

Chang

Duan

2022

Int J Adv Manuf Technol

Self Cite

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The continuous optimization of processing technology and evaluation methods is an important way to achieve high processing quality and processing e ciency for di cult-to-process materials. To solve the problem of frequent defects on the slot, the ultrasonic vibration assisted slot-milling (UVASM) technology was developed for processing titanium alloy. Simultaneously, comparative experiments were carried out between UVASM and conventional slot-milling (CSM), in terms of surface features of slot bottom and slot sidewall, cutting force, tool trajectory, chip morphology, and micro-hardness. The results show that uniform vibration micro-texture could signi cantly improve surface topography of slot bottom in UVASM, while numerous tool feed trajectories and observable machining defects detract from the surface quality in CSM. The UVASM can greatly reduce material spalling and edge breakage, thereby maintaining a smooth and regular edge pro le of slot sidewall. The tool tips trajectories of two machining methods are highly corresponding to the machining textures of the slot sidewall surface. There is a high-frequency and small-amplitude force uctuation signal on the axial force waveform in UVASM, which can reduce the instantaneous maximum milling force and milling force in the stable stage by 8.7% and 12.2%, respectively. The UVASM has a better chip breaking effect and surface anti-scratch effect and the UVASM can obtain higher surface micro-hardness and deeper plastic deformation layer than those of CSM. In summary, the multi-dimensional evaluation of slot processing status has been completed and the processing quality of the slot has been improved.

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“…The vibration displacement correlated with the ultrasonic amplitude and the piezoelectric stack are established, but the displacement of PZT stack with current/voltage is not involved. Zhao et al studied the stability of longitudinal-torsional rotary ultrasonic transducer considering load effects [29,30]. The transfer matrix of wave equation based on the piezoelectric equation is combined to derive the relationship between current, impedance and amplitude.…”

Section: Introductionmentioning

confidence: 99%

An automated monitoring strategy for ultrasonic amplitude prediction of piezoelectric transducer

Zhao

et al. 2022

Measurement

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Influence of force load on the stability of ultrasonic longitudinal–torsional composite drilling system

Cited by 13 publications

References 15 publications

Analysis of Ultrasonic Machining Characteristics under Dynamic Load

Analysis of Ultrasonic Machining Characteristics under Dynamic Load

Surface feature and material removal in ultrasonic vibration-assisted slot-milling of Ti–6Al–4 V titanium alloy

An automated monitoring strategy for ultrasonic amplitude prediction of piezoelectric transducer

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