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Title of Journal: J Intell Manuf

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Abbravation: Journal of Intelligent Manufacturing

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Springer US

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DOI

10.1002/bip.360230806

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1572-8145

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Finite element modeling of low speed reaming vibra

Authors: S Towfighian K Behdinan M Papini Z Saghir P Zalzal J de Beer
Publish Date: 2007/07/03
Volume: 18, Issue: 6, Pages: 647-661
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Abstract

Reaming is a finishing process used to remove a small amount of material from a predrilled hole In low speed cutting processes it is the formation of lobed or multicornered holes that is of concern rather than tool chatter which occurs at high speed near the natural frequency of the tool Using a quasistatic model in the characteristic form for the reaming process a finite element modeling for the low speed reaming process based on the Euler–Bernoulli beam model was developed Cutting and rubbing forces were applied as concentrated and distributed forces on a variable engagement length of the reamer The variable engagement length is considered to simulate the actual applied forces length as the reamer advances to the workpiece The time dependant changes in the bending stiffness of the reamer were included in the governing equation of the equilibrium of the reamer and its stability analysis was performed at different time steps Using this model the vibration damping effect of uneven spacing of reamer teeth was investigated The results demonstrate that uneven spacing of reamer teeth reduces the tool vibration and therefore leads to a more stable condition Finally the optimum configuration of uneven tooth pitch angles for a sixflute reamer in order to have the highest vibration decay rate during the reaming was presented


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