Effect analysis of the interface on spindle system dynamic characteristics

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Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (10) : 231-235.

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Effect analysis of the interface on spindle system dynamic characteristics

WANG Bo; SUN Wei; TAI Xing-yu; WEN Bang-chuan

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Abstract

Spindle-bearing，spindle-holder and holder-tool interfaces exist in the NC spindle system, and the characteristic of these interface has the significant influence on the spindle system dynamics. It is important to obtain the influence law for the dynamic design and modification of the spindle system. The paper takes a spindle system of vertical machining center as its object and builds the dynamic model with the finite element method, based on which, the contrastive analysis researches the inherent characteristic of interfaces and the law of influence of tool point FRF. The conclusion can be described as follow: the characteristic of spindle-bearing interface strongly controls the rigid modal of spindle system and tool point frequency response function (FRF) of low frequencies, however, the characteristic of spindle-holder and holder-tool interface directly influences the elastic modal and tool point FRF of high frequencies. Besides, the paper also could provide reference for the dynamics characteristic and stability forecast of spindle system.

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spindle system / interface / dynamic characteristic / finite element method

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WANG Bo;SUN Wei; TAI Xing-yu; WEN Bang-chuan. Effect analysis of the interface on spindle system dynamic characteristics[J]. Journal of Vibration and Shock, 2011, 30(10): 231-235