STUDY ON EFFECT OF PLANETARY AND DIAGONAL TOOL ACTUATION STRATEGIES ON DISTORTION OF FEATURES MACHINED BY EDM PROCESS
Keywords:EDM, Kinematics, Accuracy, Quality, Distortion, Roughness
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.
Mishra P K (2012) “Nonconventional Machining”, Narosa Publishing House Pvt. Ltd., New Delhi.
Ziada Y and Koshy P (2007) “Rotating Curvilinear Tools for EDM of Polygonal shapes with sharp corners, Annals of the CIRP Vol. 56(1), 221-224.
Rajurkar K P and Royo G F (1989) “Effect of R.F. control and orbital motion on surface integrity of EDM components, Journal of Mechanical Working Technology, Vol. 20, 341-352.
El-Taweel T A and Hewidy M S (2009) “Enhancing the performance of electrical-discharge machining via various planetary modes, International Journal of Machining and Machinability of Materials, Vol. 5(2 - 3), 308-320.
Chen D C, Wang Y K and Lin G F, (2013) Effect of Electrode Route Motion on Electrode Wear in EDM Machining of Mold Steel, Arabian Journal of Science and Engineering, Vol. 38, 2793-2800.
Dave H, Desai K and Raval H, (2012) Experimental Investigations on Orbital Electro Discharge Machining of Inconel 718 using Taguchi Technique, International Journal of Modern Manufacturing Technologies, Vol. IV(1), 53-58.
Rebelo J C, Dias A M, Mesquita R, Vassalo P and Santos M, (2000) A experimental study on electro-discharge machining and polishing of high strength copper-beryllium alloys, Journal of Materials Processing Technology, Vol. 103, 389-397.
Maradia U, Scuderi M, Knaak R, Boccadoro M, Beltrami I, Stirnimann J and Wegener K (2013) “Super-finished surfaces using meso-micro EDM”, Procedia CIRP, Vol. 6, 157-162.
Ferreira J C (2007) “A study of die helical thread cavity surface finish made by Cu-W electrodes with planetary EDM”, The International Journal of Advanced Manufacturing Technology, Vol. 34, 1120-1132.
umar S, Dave H K and Desai K P (2016) “Experimental investigation on performance of different tool motion strategies in EDM process for boring operation”, The International Journal of Advanced Manufacturing Technology, Vol. 87(5), 1609-1620.