Effect of R۴۱۰a Coolant on Dimensional Deviation in Turning of AISI ۱۰۴۵ Steel

Friction between the tool and the workpiece during machining operations always increases the tool wear rate. Removing this problem by using fluids and cooling the tools is essential. In this research, the effects of two cooling conditions: Water Soluble Cutting Oil (WSCO) fluid and R۴۱۰a coolant, on the dimensional deviation of AISI ۱۰۴۵ steel (CK۴۵) in turning with a high-speed steel (HSS) tool were investigated. The selected parameters were cutting speeds of ۱۵, ۲۵, ۴۰ and ۵۵ m/min, cutting depths of ۰.۵, ۱ and ۱.۵ mm and feed rates of ۰.۰۵, ۰.۱۲ and ۰.۲ mm/rev. The results show that cooling by R۴۱۰a coolant reduces the tool wear rate due to its high cooling power and better temperature control at the cutting zone compared to WSCO fluid. Based on the minimums of dimensional deviation in different conditions, using R۴۱۰a coolant can increase the cutting speed by ۶۰% from ۲۵ to ۴۰ m/min. Also, in the optimal condition at a cutting speed of ۴۰ m/min, cutting depth of ۱ mm and feed rate of ۰.۰۵ mm/rev., dimensional deviation is reduced by up to ۶ times respectively. In the optimal condition, the dimensional deviation based on the diameter difference along ۳۰۰ mm is reduced to ۱۴ µm. The effect of each input variable on dimensional deviation was calculated by statistical analysis and was validated by ANOVA.

کلیدواژه ها:

Tool wear ، cryogenic cooling ، surface roughness ، dimensional deviation ، turning