An Experimental Evaluation of SiO2 nano cutting fluids in CNC Turning of Aluminium Alloy AL319 via MQL Technique.

Abstract

The present study evaluate the performance of SiO2 nano cutting fluid in CNC turning of AL319 Aluminium Alloy combined with MQL technique. The cutting performance namely surface roughness, cutting temperature and tool wear were investigated against feed rate and spindle speed. The spindle speed of 1000 to 1800 RPM and feed rate of 0.10 to 0.20 mm/rev were used as the input parameter. While the MQL nozzle pressure is kept constant at 0.5 MPa. The cutting performances of SiO2 nano cutting fluid with three volume concentrations (0.5, 1.0 and 1.5%) were then compared to the conventional CNC cutting fluid. Beforehand, the suspended form of SiO2 is dispersed in CNC conventional coolant base. One-step and dilutions methods were used in preparing nano cutting fluid. Response surface method (RSM) via Face centered design (FCD) was employed in designing the experimental work. The stability of SiO2 Nano cutting fluid is observed via visual sedimentation. The experimental outcome depicts lowest cutting temperature of 28.4°C and surface roughness of 1.08902 Ra when SiO2 nano cutting fluid with 1.5% volume concentration is employed. It can be concluded that the higher the SiO2 Nano fluid volume concentration, the better the surface roughness quality and lowering the cutting temperature. While no significant result shown in tool wear due to short period of experimental cutting time and relative soft material coupled with coated insert carbide used. Longer cutting time with higher concentration of SiO2 nano cutting fluid is recommended in future work in order to obtain significant result in tool wear.