C012 Back-Surface Deburring of a Small Hole Using Whirling Electrical Discharge Machining with Wire Tool Electrode

Abstract

In this paper, the authors describe a highly efficient deburring method using whirling electrical discharge machining (whirling EDM) with a wire tool electrode. The back-surface deburring of a small hole or a cross-drilled hole is difficult. Thus, whirling EDM method with a wire tool electrode, which requires no changes of the tool electrode after deburring, was developed. The authors clarified the processing features of whirling EDM and dry whirling EDM with a wire tool electrode through fundamental experiments on the back-surface chamfering of small holes. They also verified that it is possible to remove back-surface burrs of a small hole by dry whirling EDM.