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Title: Influence of vibration on mechanical polishing micro-structured surface using discrete element method

Authors: Guilian Wang; Bingrui Lv; Li Liu; Bin Liu; Haibo Zhou

Addresses: Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering and National Demonstration Center for Experimental Mechanical and Electrical Engineering Education, Tianjin University of Technology, Tianjin 300384, China ' Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering and National Demonstration Center for Experimental Mechanical and Electrical Engineering Education, Tianjin University of Technology, Tianjin 300384, China ' Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering and National Demonstration Center for Experimental Mechanical and Electrical Engineering Education, Tianjin University of Technology, Tianjin 300384, China ' Tianjin Laboratory of Control Theory and Applications in Complicated System, Tianjin 300384, China and School of Electrical and Electronic Engineering, Tianjin University of Technology, Tianjin 300384, China ' Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering and National Demonstration Center for Experimental Mechanical and Electrical Engineering Education, Tianjin University of Technology, Tianjin 300384, China

Abstract: A model using discrete element method (DEM) was conducted to simulate vibration assisted mechanical polishing micro-structured surface process by particle flow code in three dimensions (PFC3D). The effect laws of vibration frequency and amplitude on abrasive grains and polishing force were researched in detail according to the simulation results. The effects of vibration on the particles average motion velocity in one fluid cell were researched, and the simulation results show that average velocity increases with increase of vibration frequency and amplitude on the whole. The effects of vibration on the unbalanced force acting on the workpiece surface were quantified at first. The changes of average unbalanced force obviously increase for low feed rate with increase of frequency and increase approximately linearly with increase of amplitude. It is concluded that vibration with high frequency and great amplitude can significantly increase machining efficiency and improve surface quality in micro-structured surface polishing.

Keywords: polishing; vibration; micro-structured surface; discrete element method; DEM.

DOI: 10.1504/IJMMM.2020.104009

International Journal of Machining and Machinability of Materials, 2020 Vol.22 No.1, pp.24 - 46

Received: 15 Jun 2018
Accepted: 08 Nov 2018

Published online: 05 Dec 2019 *

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