Study of machining characteristics of small and deep hole in EDM drilling
Journal
Proceedings of the 15th International Symposium on Electromachining, ISEM 2007
Pages
75-80
Date Issued
2007
Author(s)
Abstract
The machining characteristics in EDM drilling of high aspect ratio small holes were investigated in this paper. Taguchi design methodology and analysis of variance (ANOVA) were applied and pertinent process parameters were identified. By regression analysis, mathematical models of material removal rate, electrode wear rate and the amount of hole-enlargement were established. Approach to estimate the total number of the holes that can be drilled by a single electrode and the machining time before EDM drilling was then formulated. Drilling operation by immersing the workpiece in water was proposed. Experimental results reveal that both of the drilling-through capability and the surface condition at the exit of the through hole are greatly improved.
Subjects
Drilling-through capability; EDM drilling; High aspect ratio; Taguchi
Other Subjects
Aspect ratio; Electrodes; Regression analysis; Taguchi methods; Drilling operation; High aspect ratio; Machining characteristics; Material removal rate; Process parameters; Single electrodes; Surface conditions; Taguchi design; Analysis of variance (ANOVA)
Type
conference paper