Effects of turning tool screw connection on horn longitudinal-bending coupled ultrasonic elliptical vibration characteristics

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (23) : 100-108.

YANG Jinchuan1, FENG Pingfa1,2, MA Ke1, ZHANG Jianfu1

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Abstract

Focusing on a combined-beam horn with ultrasonic elliptical vibration, a mathematical model of combined-beam horn with turning tool fixed by screw connection was established based on coupled vibration theory. Integrated with the pre-tightening force calculation model, the vibration characteristics of tool output were analyzed by modal and harmonic response analysis and the law of influence of screw connection on elliptical vibration mode and vibration transmission of horn was inferred. In this model, the vibration states of tool output were gained through simulations and experiments under different pre-tightening forces. The effect of the connection between tool and horn on ultrasonic elliptical vibration was specified after analyzing calculated values and experimental values. It is shown that turning screw fastening connection affects bending vibration state and as the pre-tightening torque of the turning tool increases, the vibration transmission loss between the turning tool and the horn is reduced. Moreover, the transverse bending vibration transmission quality and the overall ultrasonic vibration transmission quality of the system are improved. The research results can provide a theoretical basis for the elliptical vibration of the turning tool connection and its overall resonance design.

Key words

turning tool / screw connection / longitudinal-bending / ultrasonic elliptical vibration

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YANG Jinchuan1, FENG Pingfa1,2, MA Ke1, ZHANG Jianfu1. Effects of turning tool screw connection on horn longitudinal-bending coupled ultrasonic elliptical vibration characteristics[J]. Journal of Vibration and Shock, 2021, 40(23): 100-108

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