Title: Analysis on fabrication of micro-tools by micro-electrochemical machining process
Authors: Alok Kumar Das; Partha Saha
Department of Mechanical and Mining Machinery Engineering, Indian School of Mines, Dhanbad, Jharkhand-826004, India
Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur-721302, India
Abstract: In pulse micro-electrochemical machining process, material dissolution takes place at very close vicinity of tool electrode due to localisation of electric field and hence this process can be utilised potentially for the fabrication of micro components with high dimensional accuracy. In the present context, experiments are carried out with an indigenously developed set up to fabricate micro-electrodes (tools) of diameter < 30 µm from cylindrical copper bars of initial diameter 780 µm. The influence of different experimental parameters on material dissolution rate during the fabrication of micro electrodes has been investigated. It is observed that with increase in pulse-on-time, frequency of pulse power supply and applied voltage, the material removal rate increases; but with the increase in concentration of electrolyte material removal rate decreases as the mobility of ions decreases. The detailed analysis of the experimental results is described in this paper.
Keywords: micro-tools; micro-electrochemical machining; micro ECM; electrochemical machining; micromachining; electrical double layer; microfabrication; cylindrical copper bars; material removal rate; MRR.
Int. J. of Nanomanufacturing, 2013 Vol.9, No.1, pp.66 - 76
Submission date: 21 Mar 2012
Date of acceptance: 19 Sep 2012
Available online: 26 Mar 2013