The influences of various mixed dielectric fluids on the performance electrical discharge machining of AISI D2 hardened steel

被引:8
作者
Lajis, M. A. [1 ]
Hosni, N. A. J. [2 ]
机构
[1] Univ Tun Hussein Onn Malaysia, Dept Mfg & Ind Engn, Batu Pahat 86400, Johor, Malaysia
[2] Univ Tun Hussein Onn Malaysia, Adv Mfg & Mat Ctr SMART AMMC, Sustainable Mfg & Recycling Technol, Batu Pahat 86400, Johor Darul Tak, Malaysia
关键词
Mixed dielectric fluids; material removal rate; electrode wear rate; surface finish; POWDER; IMPROVEMENT; SURFACTANT; EDM;
D O I
10.1002/mawe.201700253
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This research mainly explores the influence of various mixed dielectric fluids on the performance of electrical discharge machining of AISI D2 hardened steels. In this investigation, four types of dielectric fluids such as pure kerosene, kerosene and chromium powder mixed, kerosene and Span-20 surfactant and the combination of kerosene with chromium powder and Span-20 surfactant were studied. The obtained results illustrated that the addition of chromium powder and Span-20 surfactant in the dielectric fluid obtained high material removal rate, low electrode wear rate and good surface finish. The presence of chromium powder will stabilize the gap distance between electrodes which promotes the occurrence of multiple discharges in one input pulse and particle agglomeration is reduced after Span-20 surfactant molecules cover the surface of debris and carbon dregs in kerosene solution. Combination of kerosene with chromium and Span-20 surfactant were found significant to improve the effects of carbon accumulation and drag discharge, and reduce unstable concentrated discharge. Translation abstract Diese Forschung untersucht hauptsachlich den Einfluss verschiedener gemischter dielektrischer Flussigkeiten auf die Leistung der Funkenerosion von geharteten AISI D2-Stahlen. In dieser Untersuchung wurden vier Arten dielektrischer Flussigkeiten, wie reines Kerosin, Kerosin und Chrom-Pulver gemischt, Kerosin und Span-20-Tensid und die Kombination von Kerosin mit Chrom-Pulver und Span-20-Tensid untersucht. Die Ergebnisse zeigen, dass die Zugabe von Chrom-Pulver und Span-20-Tensid in die dielektrische Flussigkeit eine hohe Materialentfernungsrate, eine geringe Elektrodenverschlei ss rate und eine gute Oberflachengute ergibt. Das Vorhandensein von Chrom-Pulver stabilisiert den Spaltabstand zwischen den Elektroden, was das Auftreten von Mehrfachentladungen in einem Eingangsimpuls fordert und die Partikelagglomeration wird reduziert, nachdem Span-20-Tensidmolekule die Oberflache von Ablagerungen und Kohlenstoffabrieb in Kerosinlosung bedecken. Die Kombination von Kerosin mit Chrom-Pulver und Span-20-Tensid verbessert die Wirkungen der Kohlenstoffakkumulation und der Dreg-Entladung signifikant und reduziert die instabile konzentrierte Entladung.
引用
收藏
页码:413 / 419
页数:7
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