Mathematical Modelling of Material Removal Rate During Electric Discharge Machining Using Buckingham’s Pi-Theorem
Abstract
In the present work an attempt has been made to model material removal rate (MRR) by using Buckingham’s Pi-theorem during electric discharge machining (EDM) of shape memory NiTi alloy. Machining of Ni-Ti alloyis mostly attempted by non- conventional methods of machining, and, especially by EDM, as this advance material imposes machinability issues when cut by conventional processes. However, EDM process has low material removal rate.In present investigation EDM of NiTi alloy is carried out using electrolytic copper toolon die sink type of electric discharge machine. The experimental-based mathematical model to predict MRR is developed varying process parameters such as gap current, pulse on time, pulse off time, voltage, workpiece electrical conductivity and tool electrode electrical conductivity during the experiments. The model developed using dimensional analysis and Buckingham pie theorempredicts the value of MRR close to the experimental observations with the accuracy of 91 % shows that the developed model could be used to predict MRR during EDM of NiTi alloy within the domain of the parameters selected in the present study.
- Publication:
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Materials Science and Engineering Conference Series
- Pub Date:
- March 2020
- DOI:
- 10.1088/1757-899X/810/1/012049
- Bibcode:
- 2020MS&E..810a2049G