Investigations of Effect of Rotary EDM Electrode on Machining Performance of Al6061 Alloy

International Conference on Recent Advances in Materials & Manufacturing Technologies

Robinson Smart, D.S.^1 ; Smart, Joses Jenish^2 ; Periasamy, C.^3 ; Samuel Ratna Kumar, P.S.^4

Department of Mechanical Engineering, Karunya University, Tamil Nadu, Coimbatore

641114, India^1

Department of Industrial Manufacturing and Systems Engineering, University of Texas at Arlington, Arlington

TX

76019, United States^2

Department of Mechanical Engineering, Birla Institute of Technology and Science, Dubai Campus, Pilani, India^3

Department of Mechanical Engineering, Kumaraguru College of Technology, Tamil Nadu, Coimbatore

641049, India^4

关键词: Conventional machining;    Electric discharge machining (EDM);    Electrical discharges;    Machining parameters;    Machining performance;    Material removal rate;    Offshore applications;    Surface roughness (Ra);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/346/1/012064/pdf
DOI  :  10.1088/1757-899X/346/1/012064

来源: IOP

【 摘 要 】

Electric Discharge Machining is an essential process which is being used for machining desired shape using electrical discharges which creates sparks. There will be electrodes subjected to electric voltage and which are separated by a dielectric liquid. Removing of material will be due to the continuous and rapid current discharges between two electrodes.. The spark is very carefully controlled and localized so that it only affects the surface of the material. Usually in order to prevent the defects which are arising due to the conventional machining, the Electric Discharge Machining (EDM) machining is preferred. Also intricate and complicated shapes can be machined effectively by use of Electric Discharge Machining (EDM). The EDM process usually does not affect the heat treat below the surface. This research work focus on the design and fabrication of rotary EDM tool for machining Al6061alloy and investigation of effect of rotary tool on surface finish, material removal rate and tool wear rate. Also the effect of machining parameters of EDM such as pulse on & off time, current on material Removal Rate (MRR), Surface Roughness (SR) and Electrode wear rate (EWR) have studied. Al6061 alloy can be used for marine and offshore applications by reinforcing some other elements. The investigations have revealed that MRR (material removal rate), surface roughness (Ra) have been improved with the reduction in the tool wear rate (TWR) when the tool is rotating instead of stationary. It was clear that as rotary speed of the tool is increasing the material removal rate is increasing with the reduction of surface finish and tool wear rate.