TY - JOUR
T1 - Dynamic stability of a motorized high speed machine tool spindle supported on bearings
AU - Shaik, Jakeer Hussain
AU - Srinivas, J.
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2014
Y1 - 2014
N2 - Dynamic behaviour of spindle system influences chatter stability of machine tool considerably. Self-excited vibrations of the tool results in unstable cutting process which leads to the chatter on the work surface and it reduces the productivity. In this paper, a system of coupled spindle bearing system is employed by considering the angular contact ball bearing forces on stability of machining. Using Timoshenko beam element formulation, the spindle unit is analyzed by including the gyroscopic and centrifugal terms. Frequency response functions at the tool-tip are obtained from the dynamic spindle model. In the second phase, solid model of the system is developed and its dynamic response is obtained from three dimensional finite element analysis. The works on analysis of the stability of milling processes focus on calculating the stability boundary of the machining parameters based on the dynamic models characterizing the milling processes. The stability lobe diagrams are generated from frequency response functions (FRF's) lead to an stability limit prediction for the system at high speed ranges.
AB - Dynamic behaviour of spindle system influences chatter stability of machine tool considerably. Self-excited vibrations of the tool results in unstable cutting process which leads to the chatter on the work surface and it reduces the productivity. In this paper, a system of coupled spindle bearing system is employed by considering the angular contact ball bearing forces on stability of machining. Using Timoshenko beam element formulation, the spindle unit is analyzed by including the gyroscopic and centrifugal terms. Frequency response functions at the tool-tip are obtained from the dynamic spindle model. In the second phase, solid model of the system is developed and its dynamic response is obtained from three dimensional finite element analysis. The works on analysis of the stability of milling processes focus on calculating the stability boundary of the machining parameters based on the dynamic models characterizing the milling processes. The stability lobe diagrams are generated from frequency response functions (FRF's) lead to an stability limit prediction for the system at high speed ranges.
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U2 - 10.4028/www.scientific.net/AMM.612.29
DO - 10.4028/www.scientific.net/AMM.612.29
M3 - Conference article
AN - SCOPUS:84906489202
VL - 612
SP - 29
EP - 34
JO - Applied Mechanics and Materials
JF - Applied Mechanics and Materials
SN - 1660-9336
T2 - International Symposium on Engineering and Technology, ISET 2014
Y2 - 9 January 2014 through 10 January 2014
ER -