Investigation of drilling process using nanofluid

Mohd Hajazi, Aini Syahida (2016) Investigation of drilling process using nanofluid. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Nanofluid is one of the new formulation of cutting fluid used in machining in order to obtain better surface finish of products. It also has high thermal conductivity compared to conventional cutting fluid. Hence, in this study, the effect of nanofluid to the performances of drilling process were investigated. The objectives of this study is to investigate the performances of drilled hole (surface roughness, dimensional accuracy and burr formation) using nanofluid (carbon nanofiber mixed with deionized water) as cutting fluid during the drilling process and lastly to compare the machining performance using carbon nanofiber nanofluid and deionized water. Five different concentrations of carbon nanofiber which is 0%, 0.25%, 0.50%, 0.75% and 1% were used in this investigation. AISI 304 stainless steel was used as the workpiece. The cutting speed and volume of carbon nanofiber nanofluid were remained constant which is 120 rpm and 3.8 ml respectively. The appropriate equipments were used to measure the surface roughness inside drilled holes, dimensional accuracy and burr formation. The result shows that by adding carbon nanofiber to base fluid can help to improve the performances of driled holes. Based on surface roughness result obtained, when the presence of CNF concentration increased up to 0.75% the lowest surface roughness which is 2.54 μm was obtained. The dimensional accuracy of drilled hole in term of total different diameter of entry and exit hole with the presence of CNF nanofluid gives smaller value of diameter deviation compared to without presence of CNF particles. With the presence of CNF 0.25% give least average of different size 0.0624 mm. Besides, less of entrance burr width was observed with the thickness of 0.01 mm by applying 0.75% of CNF nanofluid.

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