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Detection of the eroding surface in the EDM process based on the current signal in the gap
Authors:Jo?ko Valentin?i?  Mihael Junkar
Affiliation:(1) Faculty of Mechanical Engineering, Aškerèeva 6, 1000 Ljubljana, Slovenia
Abstract:To achieve high removal rate and low electrode wear in sinking electrical discharge machining process (EDM), rough machining parameters have to be selected according to the size of the eroding surface. In general, the size of the eroding surface varies according to the depth of the machining. Thus, it has to be determined on-line. This paper shows that the electric current signal in the gap depends on the size of the eroding surface. The significance of the process attributes of the electric current signal is established by inductive machine learning and the general decision rules are derived. The size of the eroding surface can be detected on-line by monitoring and evaluating the electric current signal in the gap.
Keywords:Conditional average estimator  EDM  Inductive machine learning  Modelling  Monitoring  Rough machining
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