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- 저자 : Xiangqiang Zhong (검색결과 2 건)
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Optimization and Experiment of Two-Dimensional Parallel Decoupling Image Stabilization Mechanism
Xiangqiang Zhong,Caixia Liu,Zhimin Di,Huajie Fang 한국정밀공학회 2020 International Journal of Precision Engineering and Vol.21 No.10
In order to improve the precision positioning accuracy of image stabilization mechanism, a two-dimensional image stabilization mechanism with parallel decoupling was proposed. Firstly, according to the principle of lever-half-bridge hybrid amplifi cation mechanism, the structure of two-dimensional image stabilization mechanism was designed, the working principle was analyzed, and natural frequency of the mechanism was calculated. Secondly, static analysis, modal analysis, and fl exure hinge parameter optimization of the mechanism based on ANSYS were carried out. The simulation results show that two-dimensional image stabilization mechanism can realize the micro-displacement positioning function in the X and Y directions. The resonance phenomenon does not occur when the mechanism works. The thickness and width are the sensitive parameters of fl exure hinge. Finally, the actuation performance of two-dimensional image stabilization mechanism was tested during the prototype, the relationship between the output displacement in the X and Y directions and the input voltage, frequency was tested, and the displacement coupling in the X and Y directions was tested. The experimental results show that the motion displacement of the mechanism is 103.9 × 104.8 μm, and the output displacement coupling does not exceed 7.5% of the stroke. The image stabilization mechanism can realize large stroke and precision positioning functions, and is feasible in engineering applications.
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Temperature field modeling and experimental study on ultrasonic consolidation for Al-Ti foil
Xiangqiang Zhong,Jiang Feng,Shunyu Yao 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.6
Additive manufacturing technology for ultrasonic consolidation (UC) makes use of the properties of piezoelectric transducers, which produce high-frequency vibrations. When applied to metal foil surfaces, these vibrations help form solid-phase bonding between metals under certain pressure. To obtain better consolidation process parameters, samples of 0.2-mm-thick Ti-6Al-4V titanium alloy, and 6061 aluminum alloy were consolidated with the UC method; and temperature modeling and experiments of consolidation joints were carried out. First, the temperature field model of UC for Al-Ti foil was established, based on the temperature field theory of the UC system, and the transient temperature field distribution was obtained by finite element analysis. The highest temperature of the consolidation system was mainly concentrated on the contact area between the sonotrode and the foil, as well as the foil and the substrate, and it gradually decreased along with the feed direction. Then, the temperature of Al-Ti foil was measured by thermocouple, and the maximum temperature was measured and compared with the simulated value. The experimental results show that the appropriate UC force for Al-Ti foil is 2.0 – 3.0 kN, the effect of the oscillator amplitude on the temperature of the consolidation interface is greater than that of the consolidation pressure, and the oscillator amplitude is greater than 40 μm. The above process parameters can facilitate the effective consolidation of Al-Ti foil.
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