14
Machining by Thermal Erosion
14.1 INTRODUCTION
Machining by thermal erosion involves the application of very intensive local heat to remove the material by melting and evaporating small areas at the workpiece surface. These processes include electrodischarge machining (EDM), laser beam machining (LBM), electron beam machining (EBM), ion beam machining (IBM), and plasma jet machining (PJM). Figure 14.1 shows the main factors related to the tool, workpiece, and parameters that control the characteristics of the thermal machining processes.
14.2 ELECTRODISCHARGE MACHINING
The history of EDM dates back to the days of World Wars I and II when B.R. and N.I. Lazarenko invented the relaxation circuit (RC). Since 1940, EDM die sinking has been ...
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