709 Development of Torsional Vibration Transducer for Tightening Miniature Screw with Addition of Ultrasonic Vibration : Effect of the number and width of helical slot

This paper presents an innovative design and development of a longitudinal-torsional ultrasonic vibration transducer. This longitudinal-torsional ultrasonic vibration transducer can be stimulated up by one group of longitudinal piezoelectric ceramics and it has a shared longitudinal and torsional vibration node plane. The longitudinal-torsional ultrasonic vibration transducer consists of two amplitude horns, a mounting flange, and four pieces of axially poled piezoelectric ceramics. Theoretical analysis and formulation of the share vibration node have been studied, which are used to guide the design of the transducer. Five helical grooves are cut off along the circumference of the amplitude horn so as to convert the longitudinal vibration to both longitudinal and torsional vibration at the same time. Simulations have confirmed that each longitudinal-torsional vibration mode has one shared node on the transducer. The vibration amplitude is measured by a laser displacement sensor and the largest longitudinal displacement of longitudinal-torsional ultrasonic vibration transducer reaches 6 µm and torsional displacement reaches 11 mrad when 500Vpp voltage is applied on the transducer. Ultrasonic vibration milling experiments have shown that the longitudinal-torsional ultrasonic vibration transducer has played a great role in the cutting process as the longitudinal-torsional ultrasonic vibration milling decreases the cutting force substantially compared to the convention milling operations.

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Experimental Study on Laser Metal Deposition of FGMs with Ultrasonic Vibration

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.271-272.131 ◽

2012 ◽

Vol 271-272 ◽

pp. 131-135 ◽

Cited By ~ 3

Author(s):

Lan Yun Qin ◽

Wei Wang ◽

Guang Yang

Keyword(s):

Ultrasonic Vibration ◽

Metal Deposition ◽

Functionally Graded ◽

Laser Metal Deposition ◽

Vibration System ◽

Hard Phase ◽

Graded Materials ◽

Vibration Effect ◽

Distribution Uniformity ◽

Microstructure And Mechanical Property

Referring to the ultrasonic vibration effect on casting, welding and laser cladding, the paper demonstrates the feasibility that it can be also used in Laser Metal Deposition(LMD)of titanium alloy to protect the defects such as crack,pore and oxidation and refine the grain size and improve the distribution uniformity of solidified structure.So the paper applies ultrasonic vibration system to fabricate the functionally graded materials(FGMs) samples and analyses its effect on the specimen microstructure and mechanical property by experiments.The results show that ultrasonic vibration can suppress the formation of pore、refine the grain and make the TiC hard phase more homogeneous in the FGMs parts, which is also indicated by the microhardness tests

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21119 Reduction of Residual Stress Using Ultrasonic Vibration : Effect of 2 Points Excitation

The Proceedings of Conference of Kanto Branch ◽

10.1299/jsmekanto.2005.11.421 ◽

2005 ◽

Vol 2005.11 (0) ◽

pp. 421-422

Author(s):

Shigeru Aoki ◽

Tadashi Nishimura ◽

Tetsumaro Hiroi ◽

Kiyotaka Aokimoto

Keyword(s):

Residual Stress ◽

Ultrasonic Vibration ◽

Vibration Effect

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20712 Reduction of Residual Stress Using Ultrasonic Vibration : Effect of 2 Excitations with Different Frequencies

The Proceedings of Conference of Kanto Branch ◽

10.1299/jsmekanto.2006.12.483 ◽

2006 ◽

Vol 2006.12 (0) ◽

pp. 483-484

Author(s):

Shigeru Aoki ◽

Tadashi Nishimura ◽

Tetsumaro Hiroi ◽

Shunsuke Nagasawa

Keyword(s):

Residual Stress ◽

Ultrasonic Vibration ◽

Vibration Effect

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205202 Reduction of Residual Stress in Welded Joint Using Ultrasonic Vibration : Effect of Excitation Acceleration

The Proceedings of Conference of Kanto Branch ◽

10.1299/jsmekanto.2011.17.141 ◽

2011 ◽

Vol 2011.17 (0) ◽

pp. 141-142

Author(s):

Shigeru Aoki ◽

Tadashi Nishimura ◽

Tetsumaro Hiroi ◽

Seiji Hirai ◽

Katsumi Kurita ◽

...

Keyword(s):

Residual Stress ◽

Ultrasonic Vibration ◽

Welded Joint ◽

Vibration Effect

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Wear behaviour of a carbon steel subjected to an ultrasonic vibration effect superimposed on a static contact load

Wear ◽

10.1016/0043-1648(86)90144-4 ◽

1986 ◽

Vol 110 (2) ◽

pp. 169-181 ◽

Cited By ~ 8

Author(s):

H. Goto ◽

M. Ashida ◽

Y. Terauchi

Keyword(s):

Carbon Steel ◽

Ultrasonic Vibration ◽

Contact Load ◽

Wear Behaviour ◽

Vibration Effect ◽

Static Contact

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Analysis of torsional vibration effect on the diesel engine block vibration

Mechanics & Industry ◽

10.1051/meca/2020065 ◽

2020 ◽

Vol 21 (5) ◽

pp. 522

Author(s):

Shiwei Ni ◽

Yibin Guo ◽

Binglin Lv ◽

Donghua Wang ◽

Wanyou Li ◽

...

Keyword(s):

Finite Element Method ◽

Diesel Engine ◽

Torsional Vibration ◽

Coupling Effect ◽

Fem Simulation ◽

Vibration Response ◽

Engine Block ◽

Torsional Vibrations ◽

Low Speed ◽

Vibration Effect

In this paper, the coupling effect between the crankshaft torsional vibration and the low speed diesel engine block vibration is investigated. Using finite element method (FEM), a model of low speed diesel engine is established to study the vibration response. The mode results of FEM agree very well with the test. The additional torques acting on the low-speed diesel engine caused by torsional vibration are discussed in detail. The vibration response of the low-speed diesel engine considering the effect of torsional vibration is studied using FEM simulation. By analyzing the effect of torsional vibration, the results demonstrate that the crankshaft torsional vibrations have important effects on the engine block vibration. The results from this study can provide useful theoretical guidance to predict vibration of low-speed diesel engine.

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