Key Technology and Prospect of Electro-arc Machining
As a crucial branch of discharge machining,electro-arc machining(EAM)technology exhibits processing efficiency several to hundreds of times higher than that of electrical discharge machining(EDM).EAM is particularly well-suited for aerospace applications involving the machining of challenging materials,as it remains unaffected by material strength and hardness.Nonetheless,EAM encounters several issues,including difficulties in controlling the discharge state,poor surface quality,significant tool wear,and limited machining precision.In addressing these challenges,this paper conducts a comprehensive analysis from three perspectives:arc-breaking mechanism,enhancement of surface quality,and tool wear compensation.Multiple arc-breaking mechanisms-comprising pulse arc-breaking,mechanical arc-breaking,hydrodynamic arc-breaking,and hybrid arc-breaking-are summarized.Techniques for improving surface quality,encompassing adjustments to machining parameters,cathode parameters,and the incorporation of hybrid processing,are categorized.Furthermore,diverse cathode compensation measures,such as neural network prediction,are outlined.Lastly,this paper provides a prospective outlook,aiming to furnishing theoretical guidance to surmount the obstacles associated with EAM.
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