Studying and modeling the effect of graphite powder mixing electrical discharge machining on the main process characteristics
Other Title(s)
دراسة و نمذجة تأثير التشغيل بالشرارة الكهربائية لمسحوق الجرافيت الممزوج على الخصائص الرئيسة للعملية
Joint Authors
Ali, Sad Mahmud
Amin, Samir Ali
al-Khazraji, Ahmad Nayif Ibrahim
Source
al-Khwarizmi Engineering Journal
Issue
Vol. 11, Issue 3 (30 Sep. 2015), pp.20-36, 17 p.
Publisher
University of Baghdad al-Khwarizmi College of Engineering
Publication Date
2015-09-30
Country of Publication
Iraq
No. of Pages
17
Main Subjects
Abstract EN
This paper concerned with study the effect of a graphite micro powder mixed in the kerosene dielectric fluid during powder mixing electric discharge machining (PMEDM) of high carbon high chromium AISI D2 steel.
The type of electrode (copper and graphite), the pulse current and the pulse-on time and mixing powder in kerosene dielectric fluid are taken as the process main input parameters.
The material removal rate MRR, the tool wear ratio TWR and the work piece surface roughness (SR) are taken as output parameters to measure the process performance.
The experiments are planned using response surface methodology (RSM) design procedure.
Empirical models are developed for MRR, TWR and SR, using the analysis of variance (ANOVA).The best results for the productivity of the process (MRR) obtained when using the graphite electrodes, the pulse current (22 A), the pulse on duration (120 ^s) and using the graphite powder mixing in kerosene dielectric reaches (82.84mm3/min).
The result gives an improvement in material removal rate of (274%) with respect to the corresponding value obtained when copper electrodes with kerosene dielectric alone.
The best results for the tool wear ratio (TWR) of the process obtained when using the copper electrodes, the pulse current (8 A), the pulse on duration (120 ^s) and using the kerosene dielectric alone reaches (0.31 %).
The use of graphite electrodes, the kerosene dielectric with 5g/l graphite powder mixing, the pulse current (8 A), the pulse on duration (40 ^s) give the best surface roughness of a value (2.77 ^m).This result yields an improvement in SR by (141%) with respect to the corresponding value obtained when using copper electrodes and the kerosene dielectric alone with the same other parameters and machining conditions.
American Psychological Association (APA)
al-Khazraji, Ahmad Nayif Ibrahim& Amin, Samir Ali& Ali, Sad Mahmud. 2015. Studying and modeling the effect of graphite powder mixing electrical discharge machining on the main process characteristics. al-Khwarizmi Engineering Journal،Vol. 11, no. 3, pp.20-36.
https://search.emarefa.net/detail/BIM-610952
Modern Language Association (MLA)
al-Khazraji, Ahmad Nayif Ibrahim…[et al.]. Studying and modeling the effect of graphite powder mixing electrical discharge machining on the main process characteristics. al-Khwarizmi Engineering Journal Vol. 11, no. 3 (2015), pp.20-36.
https://search.emarefa.net/detail/BIM-610952
American Medical Association (AMA)
al-Khazraji, Ahmad Nayif Ibrahim& Amin, Samir Ali& Ali, Sad Mahmud. Studying and modeling the effect of graphite powder mixing electrical discharge machining on the main process characteristics. al-Khwarizmi Engineering Journal. 2015. Vol. 11, no. 3, pp.20-36.
https://search.emarefa.net/detail/BIM-610952
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 34-35
Record ID
BIM-610952