Tool electrode wear at obtaining external cylindrical surfaces by electrical discharge machining
Journal Title: Proceedings in Manufacturing Systems - Year 2018, Vol 13, Issue 2
Abstract
The electrical discharge machining is a method that could be applied to obtain cylindrical external surfaces, inclusively by using tube type tool electrodes. To diminish the shape errors due to the presence of the metallic electroconductive particles detached from the two electrodes in the work zone, a machining scheme based on the achieving of the vertical work movement by the workpiece from up to down was preferred. An experimental research in accordance with the requirements of a full factorial experiment with three independent variables at two variation levels was performed. As independent variables, the pulse on time, pulse off time and peak current were considered, while as process output parameters the tool electrode massic and linear wear were determined. Empirical mathematical models were established and they highlighted the stronger influence exerted by the peak current intensity. The correlation coefficient was calculated also for the values obtained by the two distinct ways of evaluating the tool electrode wear.
Authors and Affiliations
Laurențiu SLĂTINEANU, Ciprian MIRCESCU, Margareta COTEȚĂ, Oana DODUN, Gheorghe NAGÎȚ, Adriana MUNTEANU
Keywords
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