Surface And Subsurface Analysis In Grinding Process

Norsilawati , Ngah (2009) Surface And Subsurface Analysis In Grinding Process. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The main aim of this study is to investigate the surface and subsurface quality of a grinding process. Surface roughness and subsurface morphology is the most critical quality measures in mechanical products. As competition among industries grows rapidly, customers have highly demand on quality surface roughness and subsurface. In metal manufacturing industries, grinding is one of the most popular methods of machining hardened materials. The use of coolant and machine vibration is identified as factors influencing the surface roughness besides the machining parameters and type of material. The parameters choose in this study are depth of cut and feed rate and the workpiece material is mild steel AISI 1020. The full factorial Design of Experiment (DOE) method is used to study the effect of machined parameter on surface roughness. The result of surface roughness was analyzed using MINITAB software. All of the specimens were machined using surface grinding machine. Surface roughness was analyzed using portable surface roughness. The surface morphology is analyzed by using image analyzer and Scanning Electron Microscope (SEM). From the results, it shows that the highest Ra value obtained is 0.58μm at the feed rate of 50 mm/min and depth of cut 2.0μm whiles the lowest Ra value obtained is 0.20μm at feed rate of 90 mm/min and depth of cut 10.0μm. Surface roughness was found to be influenced by feed rate rather than depth of cut. Dry grinding shows high surface roughness value compare to using coolant.

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