Machining process parameter and surface integrity in conventional EDM and cryogenic EDM of Al–SiCp MMC. (October 2015)

• Record Type: Journal Article
• Authors: Vinoth Kumar, S.; Pradeep Kumar, M.
• Is Part Of: Journal of manufacturing processes. Volume 20:Part 1(2015)
• Page Start: 70
• Page End: 78
• Publication Date: 2015-10
• Subjects: EDM -- Electrode wear -- LN2 Cooling -- Surface roughness -- Al–10%SiCp; Production management -- Data processing -- Periodicals; Manufacturing processes -- Periodicals; Procestechnologie; Productietechniek; Production -- Gestion -- Informatique -- Périodiques; Fabrication -- Périodiques; Manufacturing processes; Production management -- Data processing; Periodicals; 670.5
• DOI: 10.1016/j.jmapro.2015.07.007
• Languages: English
• ISSNs: 1526-6125

Abstract

Highlights: Cryogenic cooling of electrode in electrical discharge machining. Temperature measurement in EDM process. Conventional and cryogenic cooled electrode EDM analysis. Discussion of electrode wear, MRR, surface roughness and surface morphological properties of aluminium silicon carbide composite. Comparison of conventional and cryogenic cooled electrode EDM analysis. Abstract: Investigations were carried out on the machining of Al–MMC with 10% SiCp reinforcement, and conventional electrical discharge machining (CEDM) and a cryogenic cooled electrode in the electrical discharge machining process (CCEDM). The machining parameters included discharge current, pulse on time and gap voltage. The output responses comprised electrode wear ratio, material removal rate, surface roughness, electrode temperature, workpiece temperature, microstructure, micro hardness, SEM and EDX analysis. Discharge current, pulse on time, and gap voltage were found to have the most significant effect on electrode wear, while pulse on time with discharge current having the most significant effect on surface roughness. The electrode wear was reduced to 18% by cryogenic cooling. Surface roughness was also improved while machining with cryogenic electrode cooling. The scanning electron microscope (SEM) analysis was carried out to study the surface characteristics of the machined surface.