Study the Effects of Nano Fluid as a Coolant in Milling Process for Improving Machining Parameters
الموضوعات : فصلنامه شبیه سازی و تحلیل تکنولوژی های نوین در مهندسی مکانیکاحمد افسری 1 , امیرحسین زارعی 2
1 - استادیار، دانشکده مکانیک، دانشگاه آزاد اسلامی واحد شیراز
2 - کارشناس ارشد مکانیک، دانشگاه آزاد اسلامی شیراز
الکلمات المفتاحية: Copper nanofluid, Coolant fluid, Surface finish, Milling process, Tool Life,
ملخص المقالة :
The aim of this research work is to evaluate the effects of coolant including nano- powder material for the cooling purpose in milling process and comparing the results with the conventional coolant. Generation heat and weak heat transfer reduces the tool life and also deteriorate surface roughness during milling operation. To overcome this problem, it is necessary to use coolant for cooling as well as lubrication purposes. Due to limited heat removal rate from the work piece through the conventional coolant, some nano powder material is added to coolant, to improve the heat transfer coefficient. The added nano powder also increases machinability, decreases production time and improve surface roughness. In this paper nano fluid of copper with 99 percent purity added to Z1 coolant for machining of St37 work piece in milling machine. In this research, some factors such as rotational speed, feed and depth of cut in the three states of machining, with different coolant including Z1 and nano fluid and dry condition were investigated and finally temperature of machined work piece and its surface quality were evaluated. By comparing the obtained results it is evident that the heat removal rate and surface quality in the case of nano fluid are improved and furthermore the tool life as well as machining efficiency increases.
[1] Calistes R., controlling gradation of surface strains and nano structuring by large-strain machining, Journal of scripta material, 60, 2009 , pp.17-20.
[2] Beskok A., Karniadakis G., Micro flow and nano flow fundamental and simulation, Elsevier,2003.
[3] Wang X., Xu X., Choi U.S., Thermal conductivity of nanoparticle-fluid mixture, Journal of Thermophys Heat Transfer, Vol. 13, No.4, 1999, pp. 474-480.
[4] Vela Martinez L., Analysis of compliance between the cutting tool and the work piece on the stability of a turning process, Journal of machine tools manufacture, Vol. 48,Issue 9, 2008, pp.1054-1062.
[5] Xuan Y., Li Q., Heat transfer enhancement of nano fluids, International Journal of Heat Fluid flow, Vol. 21, 2000, pp. 58-64.
[6] Choi U.S., Enhancing thermal conductivity of fluids with nano particles, Development and Application of Non-Newtonian Flows, ASME, FED-Vol. 231/MD-Vol. 66,1995, pp. 99-105.
[7] توکلی روداب م.، افسری ا.، روستا پور ا.ر.، بررسی سیستم خنک کاری ماشین تراش با بکار گیری نانو سیال و مقایسه آن با امولسیون سیالات متداول، پایان نامه کارشناسی ارشد رشته مهندسی مکانیک گرایش ساخت و تولید، دانشگاه آزاد اسلامی شیراز، 1388.
