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    Dynamics and Stability of Turn-Milling Operations With Varying Time Delay in Discrete Time Domain

    Source: Journal of Manufacturing Science and Engineering:;2018:;volume( 140 ):;issue: 010::page 101013
    Author:
    Comak, Alptunc
    ,
    Altintas, Yusuf
    DOI: 10.1115/1.4040726
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Turn-milling machines are widely used in industry because of their multifunctional capabilities in producing complex parts in one setup. Both milling cutter and workpiece rotate simultaneously while the machine travels in three Cartesian directions leading to five axis kinematics with complex chip generation mechanism. This paper presents a general mathematical model to predict the chip thickness, cutting force, and chatter stability of turn milling operations. The dynamic chip thickness is modeled by considering the rigid body motion, relative vibrations between the tool and workpiece, and cutter-workpiece engagement geometry. The dynamics of the process are governed by delayed differential equations by time periodic coefficients with a time varying delay contributed by two simultaneously rotating spindles and kinematics of the machine. The stability of the system has been solved in semidiscrete time domain as a function of depth of cut, feed, tool spindle speed, and workpiece speed. The stability model has been experimentally verified in turn milling of Aluminum alloy cut with a helical cylindrical end mill.
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      Dynamics and Stability of Turn-Milling Operations With Varying Time Delay in Discrete Time Domain

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4251935
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    contributor authorComak, Alptunc
    contributor authorAltintas, Yusuf
    date accessioned2019-02-28T11:02:03Z
    date available2019-02-28T11:02:03Z
    date copyright7/27/2018 12:00:00 AM
    date issued2018
    identifier issn1087-1357
    identifier othermanu_140_10_101013.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4251935
    description abstractTurn-milling machines are widely used in industry because of their multifunctional capabilities in producing complex parts in one setup. Both milling cutter and workpiece rotate simultaneously while the machine travels in three Cartesian directions leading to five axis kinematics with complex chip generation mechanism. This paper presents a general mathematical model to predict the chip thickness, cutting force, and chatter stability of turn milling operations. The dynamic chip thickness is modeled by considering the rigid body motion, relative vibrations between the tool and workpiece, and cutter-workpiece engagement geometry. The dynamics of the process are governed by delayed differential equations by time periodic coefficients with a time varying delay contributed by two simultaneously rotating spindles and kinematics of the machine. The stability of the system has been solved in semidiscrete time domain as a function of depth of cut, feed, tool spindle speed, and workpiece speed. The stability model has been experimentally verified in turn milling of Aluminum alloy cut with a helical cylindrical end mill.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleDynamics and Stability of Turn-Milling Operations With Varying Time Delay in Discrete Time Domain
    typeJournal Paper
    journal volume140
    journal issue10
    journal titleJournal of Manufacturing Science and Engineering
    identifier doi10.1115/1.4040726
    journal fristpage101013
    journal lastpage101013-14
    treeJournal of Manufacturing Science and Engineering:;2018:;volume( 140 ):;issue: 010
    contenttypeFulltext
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