A Study On The Effect Of Machining Parameters, Machining Conditions And Materials On Surface Roughness In Turning Process

Lee, Jing Xian (2017) A Study On The Effect Of Machining Parameters, Machining Conditions And Materials On Surface Roughness In Turning Process. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 Pages) A Study On The Effect Of Machining Parameters, Machining Conditions And Materials On Surface Roughness In Turning Process.pdf - Submitted Version Download (971kB)

Abstract

Surface roughness is one of the criteria that can be used to decide the quality of products. Products with low surface roughness are more resistive to fatigue failure. Besides that, different materials have different level of machinability. Materials with good machinability can be easily cut and at the same time give good surface finish with low roughness. Hence, this study was carried out to investigate the effect of machining parameters of conventional lathe machine on quality of surface roughness on different materials and determine whether coolant and lubricant are effective to reduce surface roughness. This study started with literature reviews. Next, experiment was conducted under different conditions with different cutting parameters to obtain surfaces on aluminium alloy 6061 and carbon steel AISI 1060. All the obtained surfaces are measured by using surface roughness tester to detect their quality of surface finish in term of arithmetic average surface roughness (Ra). Justifications were made based on the obtained results. From the results obtained, it was found that it cannot be guaranteed to get low surface roughness at the highest spindle speed and the lowest feed rate. Optimization should be carried out in order to find out the most appropriate machining parameters to get low surface roughness. Spindle speed 1100 rpm and feed rate 0.094 mm/rev are suggested to be the candidates for optimization. Besides that, this study found that lubricant is the most effective condition in order to produce surface with low roughness. On top of that, it was discovered that machinability of aluminium alloy 6061 is better than machinability of carbon steel AISI 1060 because obtained surfaces of aluminium alloy 6061 showed lower surface roughness. This study is vital to be conducted as it provides crucial facts and information to help in fabrication industry especially turning process by using conventional lathe machine. The findings from this study are helpful for manufacturers to improve quality of products.

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