Title of Paper:Drilling force model for forced low frequency vibration assisted drilling of Ti-6Al-4V titanium alloy

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Affiliation of Author(s):机电学院

Journal:Int J Mach Tools Manuf

Abstract:Forced low frequency vibration assisted drilling (forced LFVAD) is an important machining method, in which the prediction of drilling thrust force and torque is necessary to optimize the drilling parameters. However, drilling force prediction remains a problem in forced LFVAD. This article presents a novel analytical model that predicts the drilling thrust force and torque, by incorporating the vibration amplitude and frequency correction, drill working angle, drilling forces within different cutting lip positions, and their transformation into thrust force and torque. In particular, the drilling forces investigated here include indentation force at chisel edge, chipping force, bouncing force, ploughing force in the ploughing area of the primary edge, and chipping and bouncing forces in the remaining part of the primary edge. Drill micro-displacement is also considered. Finally, the maximum, mean, and minimum values of the thrust force and torque predicted using this new model are verified as valid by performing a the drilling experiment of Ti–6Al–4V titanium alloy. The prediction error of maximum thrust force, maximum torque, mean thrust force and mean torque can reach 12%, 9%, 6.5%, and 10.1%, respectively. The effect of vibration amplitude on the cutting force at different positions along the drill lip is analyzed using the prediction model. Critical chip breaking amplitude is proposed and an optimization case of drilling parameters is presented. © 2019 Elsevier Ltd

ISSN No.:0890-6955

Translation or Not:no

Date of Publication:2019-11-01

Co-author:Yang, Haojun,cy,Laporte, Sylvain,xjh,hfy

Correspondence Author:dwf