Simulation research on milling vibration of large thin-wall axisymmetric part

Liang Guo ； Ming Zhou ； Fan Yang ； Yaling Qiu

《International Core Journal of Engineering》 6卷2期 (2020/02) Pp. 108-118

https://doi.org/10.6919/ICJE.202002_6(2).0016

摘要

Aiming at the poor rigidity of large thin-wall axisymmetric part and the problems of vibration in milling pro-cess, the mechanical model of large-scale thin-walled revolving part milling is established by using thin-shell theory. The constrained mode of simply supported at both ends of a large-scale thin-walled revolving part with a diameter of 800mm is calculated in this paper. The finite element analysis method is used to analyze the large thin-walled revolving bodies without internal support, six rigid internal supports and surface contact in-ternal support conditions, and their modal analysis and frequency response analysis results are obtained. The results show that the machining rigidity of the surface contact can reach 20294N/mm, which satisfies the pro-cessing rigidity requirement, avoids the severe vibration range of the machine tool-tool, and the amplitude is only 0.0475mm when the excitation is f=620Hz. The above research conclusions provide a theoretical basis for the design of fixtures for surface contact internal support.

關鍵字

Large thin-wall axisymmetric part ； Milling vibration ； Finite element analysis ； Auxiliary fixture ； Machining

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