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    Preventing chatter vibrations in heavy-duty turning operations in large horizontal lathes

    Identifiers
    URI: http://hdl.handle.net/11556/223
    ISSN: 0022-460X
    DOI: 10.1016/j.jsv.2014.12.002
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    Author/s
    Urbikain, G.; Campa, F.-J.; Zulaika, J.-J.; López de Lacalle, L.-N.; Alonso, M.-A.; [et al.]
    Date
    2015-03-31
    Keywords
    HOMOTOPY PERTURBATION METHOD
    MACHINE-TOOL CHATTER
    FLEXIBLE WORKPIECE
    MILLING OPERATIONS
    COLLOCATION METHOD
    STABILITY
    SUPPRESSION
    OPTIMIZATION
    PREDICTION
    ABSORBERS
    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 ...
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    article

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