Title: Influence of unbalanced response of ultra-high speed grinder spindle on dynamic performance

Authors: C.H. Li; S. Wang; Q. Zhang; Y.C. Ding

Addresses: School of Mechanical Engineering, Qingdao Technological University, 266033, China ' School of Mechanical Engineering, Qingdao Technological University, 266033, China ' School of Mechanical Engineering, Qingdao Technological University, 266033, China ' School of Mechanical Engineering, Qingdao Technological University, 266033, China

Abstract: This study was focused on the theoretical modelling and numerical simulation about the unbalanced response of spindle system of ultra-high speed grinder. Based on the rotor dynamics, a theoretical model was established using the transfer matrix method. The moment balance equations, and the transition matrix, the state vector, field matrix of spindle system of ultra-high speed grinder were analysed and calculated. The results showed that the amplitude of unbalance response increased by the same multiple as that of the amount of unbalance at different locations and at different speeds. Furthermore, the first order amplitude increased first and then decreased, and the maximum unbalance was located at the middle of the rotor; second order amplitude decreased first and then increased, and the maximum unbalance was located at the front end of the spindle; the third order amplitude decreased first and then increased, and the maximum unbalance was located at the back end of the spindle.

Keywords: grinder spindle systems; unbalanced response; mathematical modelling; ultra high speed grinding; dynamic performance; numerical simulation; high speed machining; rotor dynamics.

DOI: 10.1504/IJMPT.2012.051347

International Journal of Materials and Product Technology, 2012 Vol.45 No.1/2/3/4, pp.119 - 131

Published online: 18 Sep 2014 *

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