Surface Roughness and MRR Effect on Manual Plasma Arc Cutting Machining

TLDR: In this paper, the surface roughness analysis was conducted using Mitutoyo CS-3100 to determine the average roughness value (Ra), and the Taguchi method was utilized to achieve optimum condition for both outputs studied.

Abstract: Industrial surveys shows that manufacturing companies define the qualities of thermal removing process based on the dimension and physical appearance of the cuttin g material surface. Therefore, the roughness of the surface ar ea of the material cut by the plasma arc cutting process and the rate of the removed material by the manual plasma arc cutting machine was importantly considered. Plasma arc cutter Selco Genesis 90 was used to cut Standard AISI 1017 Steel of 200 mm x100 mm x 6 mm manually based on the selected parameters setting. The mater ial removal rate (MRR) was measured by determining the weight of the specimens before and after the cutting process. The surface r oughness (SR) analysis was conducted using Mitutoyo CS-3100 to determine the average roughness value (Ra). Taguchi method was utilized to achieve optimum condition for both outputs studied. The microstructure analysis in the region of the cuttin g surface is performed using SEM. The results reveal that the SR values are inversely proportional to the MRR values. The quali ty of the surface roughness depends on the dross peak that occurred a fter the cutting process.