Experimental investigation of drilling process using nanofluid as a coolant

Yahaya, Muhammad Reza (2017) Experimental investigation of drilling process using nanofluid as a coolant. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Nanofluid coolant is one of the new formulation of cutting fluids used in machining in order to obtain better surface finish of products. In this study, the effect of nanofluid to the machining performances of drilling process were investigated. The objectives of this study is to investigate the machining performances of drilled hole (surface roughness, cutting temperature and thrust force) using nanofluid (carbon nanofiber mixed with deionized water and gum arabic) as cutting fluid during the drilling process of titanium alloy using full factorial design. Two types of coolant were used which are nanofluid coolant and conventional coolant. Fixed concentrations of carbon nanofiber (0.02%) was used in this investigation. Titanium alloy was used as the workpiece. The cutting speed and feed rate were remained varied which are (15m/min and 25m/min) and (0.05 mm/rev and 0.10 mm/rev) respectively. Besides, different levels of cutting speed and feed rate were also being compared to get the optimum machining performance. Later, the performance of cutting fluid and drilling parameters were evaluated by measuring surface roughness, cutting temperature and thrust force using portable surface roughness, thermal imager and dynamometer respectively. ANOVA analysis has been done to analyse the most significant factor that affect the machining performance of Titanium alloy. The results show that better surface roughness, lower cutting temperature and thrust force can be obtained by using carbon nanofiber nanofluid compared to conventional deionized water. In addition, the value of surface roughness, cutting temperature and thrust force were decrease with the help of nanofluid plus decreasing of cutting speed and feed rate. Lastly, the lowest the value of cutting speed and feed rate which are 15 m/min and 0.10 mm/rev gives better surface roughness, cutting temperature and thrust force.

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