Table of Contents
International Journal of Manufacturing Engineering
Volume 2014 (2014), Article ID 291564, 8 pages
http://dx.doi.org/10.1155/2014/291564
Research Article

Modeling of Tool Wear in Vibration Assisted Nano Impact-Machining by Loose Abrasives

Department of Mechanical and Materials Engineering, University of Cincinnati, Cincinnati, OH 45221, USA

Received 17 May 2014; Accepted 9 September 2014; Published 20 October 2014

Academic Editor: Tuğrul Özel

Copyright © 2014 Sagil James and Murali M. Sundaram. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Vibration assisted nano impact-machining by loose abrasives (VANILA) is a novel nanomachining process that combines the principles of vibration assisted abrasive machining and tip-based nanomachining, to perform target specific nanoabrasive machining of hard and brittle materials. An atomic force microscope (AFM) is used as a platform in this process wherein nanoabrasives, injected in slurry between the workpiece and the vibrating AFM probe which is the tool, impact the workpiece and cause nanoscale material removal. The VANILA process are conducted such that the tool tip does not directly contact the workpiece. The level of precision and quality of the machined features in a nanomachining process is contingent on the tool wear which is inevitable. Initial experimental studies have demonstrated reduced tool wear in the VANILA process as compared to indentation process in which the tool directly contacts the workpiece surface. In this study, the tool wear rate during the VANILA process is analytically modeled considering impacts of abrasive grains on the tool tip surface. Experiments are conducted using several tools in order to validate the predictions of the theoretical model. It is seen that the model is capable of accurately predicting the tool wear rate within 10% deviation.