Abstract
Manufacturing is one of the most important sectors. It involves various machining operations to be performed on the workpiece, through which the output can be achieved. Global competition calls for quick manufacturing in new product development. Electrical discharge machining (EDM) is one of the sustainable manufacturing techniques available for machining the complex workpieces. Recently EDM development is taking place rapidly. Many researchers have focused on spark generation in EDM for continuous improvement. Electrical discharge machining requires the tool (master pattern) and workpiece (replica of master pattern). It works on the principle of spark erosion process. The generation of spark erosion distinguishes this non-traditional manufacturing method from traditional one. Most of the EDM utilizes the linear travels of head during machining of the workpiece. So, constrained restricted to only horizontal or vertical machining surface irrespective of curved surface machining. This review paper explains the mechanisms and methods adopted for developing the curved hole machining. These mechanisms enhance the utility and applications in the field of aerospace, molding and automobile industries.
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