An intelligent and automated system for EDM hole drilling of super alloys
This paper introduces an intelligent and automated system proposed for EDM hole drilling of super-alloys in manufacturing and re-manufacturing stages of products used in aerospace, die/mold and medical surgery. The system is a user-friendly computer-based program, which guides the end-user in order to perform sustainable and effective process. To accomplish the goals of the work, a well-planned workshop tests have been performed via drilling of micro and macro-scale holes (0.4-3 mm) on Ti-6AI-4V and Inconel 718 alloys, which are commonly used in aerospace industry and medical sector for manufacturing of highly critical components. The experimental data was refined and analysed using ANOVA to obtain parameter's relations and mathematical modelling for optimisation. ANFIS has been adopted to correlate the EDM hole drilling parameters (i.e. pulse current, pulse duration/interval, capacitance, material removal rate, electrode wear and surface roughness) for fulfilling reliable, cost/time effective and efficient hole making operations.
Characteristics Study of Inconel 718 Surface Generated By Extrusion Honing Process
-Extrusion honing (EH) process is employed to deburr, polish or radius surfaces and edges by flowing a silicone abrasive medium over the surface to be finished. Such finishing operations play a vital role in producing method of machine components. EH could be a time consuming process, even though EH is employed within the industries particularly in the case of finishing complicated internal and external shapes. In EH process, medium is the key elements that control the finishing process. Though, commercially available abrasive medium are very expensive and its affordability is an issue, especially for price sensitive industries. Inconel (718) material is widely used in aerospace industries, hence it has been chosen for the characteristics study through EH process. In the present study silicone and silicon carbide abrasive is chosen as the medium. Surface roughness parameters are used as a means of determining the performance of the EH process. The main experimental parameters are the abrasive concentration, number of passes and keeping constant hydraulic pressure. It is observed that the roughness parameters Ra, Rz, Rt and Rpk decreases after 15 passes and 25% of volume fraction of abrasive concentrations were used for the experimentation.
Role of Impurities in Electric Discharge Machining
This paper summarizes the experimental and theoretical investigations to determine the effect of impurities in dielectric liquid on the Electric Discharge Machining performance.