Effects of powder mixed dielectric on electro discharge machining (PMEDM) of HSS tool steel Online publication date: Thu, 21-Aug-2014
by Harshad A. Sonawane; Raju S. Pawade
International Journal of Mechatronics and Manufacturing Systems (IJMMS), Vol. 5, No. 5/6, 2012
Abstract: This paper reports the effects of fine powder suspended dielectric fluid on machinability of HSS tool steel in electro discharge machining. The machinability has been assessed in terms of material removal rate (MRR), relative wear ratio (RWR) and surface roughness (SR) as the response variables. The experiments were designed considering seven input factors viz. polarity, electrode type, pulse current, pulse time, gap voltage, duty cycle, and powder type. Taguchi orthogonal array L18 was used. Analysis of results indicates that the graphite powder mixed dielectric is found influential on MRR and RWR, whereas silicon powder mixed dielectric produced lower surface roughness. Based on the GRA multi-objective optimisation, the PMEDM process set at 20 amp pulse current, 90 volts gap voltage, 200 sec pulse duration and 4% duty cycle with silicon powder added electrolyte, aluminium electrode with positive polarity produce the component with lower surface roughness and RWR and higher MRR.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Mechatronics and Manufacturing Systems (IJMMS):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com