STUDY ON EFFECT OF PLANETARY AND DIAGONAL TOOL ACTUATION STRATEGIES ON DISTORTION OF FEATURES MACHINED BY EDM PROCESS
Keywords:
EDM, Kinematics, Accuracy, Quality, Distortion, RoughnessAbstract
Electro Discharge Machining (EDM) is such an advanced machining process which has been widely used for the generation of complex features on hard to machine materials despite it results in inferior surface quality and distortion during generation of sharp features. This paper aims in carrying out an experimental study to understand the effect of two different tool motion strategies for the generation of a square cavity, viz. planetary and diagonal using EDM, on surface roughness as well as the distortion of the edges of the cavities that have been machined using these strategies. Effects of various electrical and non-electrical parameters on EDM responses have been studied. Current, pulse ON time, Gap Voltage and Duty factor are considered as the electrical parameters while tool kinematics parameters like tool path offset and scanning speed have been selected as the tool motion parameters. It has been observed that planetary strategy is preferable to diagonal strategy for the generation of non-circular cavities using EDM in terms of achievement of surface finish and relative better edge reproduction capacity.
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