Preventing chatter vibrations in heavy-duty turning operations in large horizontal lathes
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2015-03-31
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Abstract
Productivity and surface finish are typical user manufacturer requirements that are restrained by chatter vibrations sooner or later in every machining operation. Thus, manufacturers are interested in knowing, before building the machine, the dynamic behaviour of each machine structure with respect to another. Stability lobe graphs are the most reliable approach to analyse the dynamic performance. During heavy rough turning operations a model containing (a) several modes, or (b) modes with non-conventional (Cartesian) orientations is necessary. This work proposes two methods which are combined with multimode analysis to predict chatter in big horizontal lathes. First, a traditional single frequency model (SFM) is used. Secondly, the modern collocation method based on the Chebyshev polynomials (CCM) is alternatively studied. The models can be used to identify the machine design features limiting lathe productivity, as well as the threshold values for choosing good cutting parameters. The results have been compared with experimental tests in a horizontal turning centre. Besides the model and approach, this work offers real worthy values for big lathes, difficult to be got from literature.
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Publisher Copyright: © 2014 Elsevier Ltd. All rights reserved.
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HOMOTOPY PERTURBATION METHOD , MACHINE-TOOL CHATTER , FLEXIBLE WORKPIECE , MILLING OPERATIONS , COLLOCATION METHOD , STABILITY , SUPPRESSION , OPTIMIZATION , PREDICTION , ABSORBERS , HOMOTOPY PERTURBATION METHOD , MACHINE-TOOL CHATTER , FLEXIBLE WORKPIECE , MILLING OPERATIONS , COLLOCATION METHOD , STABILITY , SUPPRESSION , OPTIMIZATION , PREDICTION , ABSORBERS , Condensed Matter Physics , Mechanics of Materials , Acoustics and Ultrasonics , Mechanical Engineering , Funding Info , Basque Country Government, GAITEK program. , Basque Country Government, GAITEK program.
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Urbikain , G , Campa , F J , Zulaika , J J , López De Lacalle , L N , Alonso , M A & Collado , V 2015 , ' Preventing chatter vibrations in heavy-duty turning operations in large horizontal lathes ' , Journal of Sound and Vibration , vol. 340 , pp. 317-330 . https://doi.org/10.1016/j.jsv.2014.12.002