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ultrasonic frequency vibration
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ultrasonic frequency vibration
ReviewUltrasonic vibration-assisted (UV-A) manufacturing
Compared with other low-frequency vibrations, ultrasonic vibration possesses a frequency that is much higher than the natural frequency of a manufacturing system. With this reason, ultrasonic vibration can maintain or even improve the stability In this paper, ultrasonic vibration-assisted upsetting and U-groove extrusion experiments were carried out, and numerical simulations using FEM were Macroscopic mechanism of ultrasonic vibration in ultrasonic
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Ultrasonic vibration-assisted machining: principle, design
Ultrasonic vibration-assisted (UVA) machining is a process that introduces a micro-scale high frequency vibration to the motion of a cutting tooltip to make the Ultrasonic vibration–assisted machining (VAM) is a process in which a tool or workpiece is vibrated using ultrasonic frequency small-amplitude vibrations to Design of a novel 2D ultrasonic transducer for 2D high-frequency
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High-Frequency Vibration and Ultrasonic Processing
High-Frequency Vibration and Ultrasonic Processing Dmitry G. Eskin & Iakovos Tzanakis Chapter First Online: 10 October 2018 1062 Accesses 4 Citations 1 Ultrasonic frequency. 1. Introduction. Ultrasonic vibration-assisted (UVA) forming is a type of multi-energy field coupling technology in which ultrasonic Modelling of ultrasonic vibration-assisted forming considering the
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A Review on Ultrasonic-Assisted Forming: Mechanism
The ultrasonic amplitude is generally within 100 μm, and the vibration frequency is between 20 kHz and 100 kHz. As shown in Figure 1, the ultrasonic The amplitude of vibration was controlled by adjusting the output powers of the ultrasonic generator, according to the description of the equipment, we measure the Theoretical and experimental investigations of ultrasonic vibration
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Ultrasonic machining
An ultrasonic drill from 1955. Ultrasonic machining is a subtractive manufacturing process that removes material from the surface of a part through high frequency, low amplitude Ultrasonic vibration-assisted cutting (UVAC) has been regarded as a promising technology to machine difficult-to-machine materials. It allows for a sub-micrometer form accuracy and surface A Theoretical and Experimental Investigation of High
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Usability of Ultrasonic Frequency Testing for Rapid Generation of
In an ultrasonic test, an appropriately designed specimen is stimulated to resonance vibrations at close to 20 kHz. The displacement movement of the specimen is sinusoidal with time with maximum vibration amplitudes at both ends of the specimen. Cyclic loading is determined by the amplitude and frequency of the ultrasonic vibration.After passing the ultrasonic transducer, the electric energy was converted into mechanical vibration to generate high-frequency axial impact on the lower rock via the connected tool head. The static load within a specific range was applied to the rock sample along the longitudinal direction using the air compressor.Research on influencing factors of rock breaking efficiency under
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Coatings Free Full-Text Effect of Ultrasonic
When 26 kHz ultrasonic vibration is applied, the average microhardness of the coating is 764.2 HV, which is 17.34% higher than the cladding layer without ultrasonic vibration; when the ultrasonic The integration of ultrasonic vibration into sheet forming process can significantly reduce the forming force and bring benefits including the enhancement of surface quality, the enhancement of formability and the reduction of spring-back. However, the influencing mechanisms of the high-frequency vibration on parts properties during The influence of ultrasonic vibration on parts properties during
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Novel ultrasonic vibration-assisted electrosurgical cutting system
The ultrasonic vibration of the electrode can be considered as longitudinal harmonic motion. The harmonic displacement of the electrode is given below: (1) y = Acosωt (2) A = 2πf where A and f denote the amplitude and frequency of the ultrasonic vibration, respectively. 2.2. FEM simulations of UV-A electrosurgical cuttingUnder ultrasonic vibration excitation for 140 s, the compressive strength decreased by 45.6%; (ii) under the excitation of ultrasonics, ω is the ultrasonic vibration frequency, A is the vibration amplitude, and S is the area of the ultrasonic contact action.Feasibility Study and Prospects of Rock Fragmentation Using Ultrasonic
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Ultrasonic vibration-assisted (UV-A) manufacturing processes:
To achieve the optimal UV-A densification behavior, ultrasonic vibration should be imported at an optimum combination of ultrasonic frequency, vibration amplitude, and applied time [11, 14]. The underlying mechanism of bond formation between the consolidated metal powders in UV-A densification process can be revealed by The ultrasonic vibration displacement load U is as follows: where A is the maximum amplitude of the ultrasonic vibration output and is the frequency of ultrasonic vibration.. The velocity load F applied to the wall can be obtained by deriving formula (), as follows:The amplitude “A = 22 μm,” the angular velocity “, ” the frequency of the Microcrack Growth Properties of Granite under Ultrasonic High-Frequency
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Theoretical and experimental investigations on rotary ultrasonic
The ultrasonic vibration has a frequency of 20 kHz and an amplitude of 4 µm, respectively. The feeding motion was generated by the combination of a linear stage, an NSC-A1 motion controller, and QuickMotion software (Dslide, Newmark, USA).When the vibration frequency exceeds 20 kHz (ultrasonic regime), the dynamic surface deformation is almost imperceptible, and the contact angle becomes apparently constant. For wetting systems, the vibration reduces the contact angle . That is, ultrasonic vibration induces an instantaneous increase of wettability.Energetic study of ultrasonic wettability enhancement PMC
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Transient separation cutting characteristic of axial ultrasonic
Ultrasonic vibration cutting (UVC), including elliptical ultrasonic vibration cutting (EUVC), has been gradually developed as an advanced precision machining method [].UVC has displayed significant advancements, such as a 50× decrease of the cutting force [], an ultra-precision machined surface with 0.026-μm roughness [], 100× decrement of Ultrasonic high-frequency vibrational fracture technology can compensate for the deficiencies of traditional fracture methods and has promising applications in underground rock drilling engineering. In this study, ultrasonic high-frequency vibrational tests were performed on brittle fine-grained red sandstone in Applied Sciences Free Full-Text Mesoscopic Damage and
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Feasibility Study and Prospects of Rock Fragmentation
is the ultrasonic vibration frequency, A is the vibration amplitude, and S is the area of the. ultrasonic contact action. Considering the rock strength.When the vibration frequency exceeds 20 kHz (ultrasonic regime), the dynamic surface deformation is almost imperceptible, and the contact angle becomes apparently constant. For wetting systems, the vibration reduces the contact angle [16]. That is, ultrasonic vibration induces an instantaneous increase of wettability.Energetic study of ultrasonic wettability enhancement
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An insight into ultrasonic vibration assisted conventional
Vibration-assisted manufacturing is one of the new techniques of manufacturing that is growing and finding many applications because of promising results. 1 Vibration-assisted manufacturing processes, in general, have been performed using ultrasonic vibration. Ultrasonic vibrations are waves that propagate above the Regarding application of UAD, this leads to the demand of synchronization of ultrasonic vibration frequency and rotation speed. This approach is well known for vibration-assisted machining, especially vibration-assisted turning with low frequencies [41, 42, 44, 50].Kinematic analysis and process stability of ultrasonic-assisted
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Edge breakage mechanism of optical glass surface in ultrasonic
However, the study of milling optical glass surface and sub-surface quality and exit damage is relatively small. Whether the utility of high-frequency vibration in ultrasonic processing can have an important effect on the surface edge crushing damage of BK7 optical glass workpiece is yet to be studied.The ultrasonic device operated at a vibration frequency of 20 kHz with a variable amplitude rod of A = 10 µm. In the model, the dimensions were as follows: ab = 10 mm, cd = 10 mm, ef = 60 mmPress forming using ultrasonic vibration Request PDF
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Effect of ultrasonic-vibration drawing process on Bi-2212
An ultrasonic-vibration generator with the maximum output of 2 kW and fixed frequency of 20 kHz was installed on the machine and the ultrasonic-vibration is passed on to the samples by thread. The relative amplitude of applied ultrasonic-vibration was set as 0%, 25%, 50%, and 90% of the maximum amplitude, respectively, which The longitudinal ultrasonic amplitude exceeds 3.5 μm, and the surface roughness value has an obvious upward trend. The reason for this phenomenon was that under the ultrasonic vibration high-frequency hammering, the removal method of the reinforcement phase particles was more hammered into small pieces remove.Finite Element and Experimental Analysis of Ultrasonic Vibration
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