Effectiveness of liquid crystal additive in the cutting fluid

Abstract

1. Tested twisted nematic liquid crystal has a positive influence on technological properties of mineral oil-based coolant within cutting speed variation range. When using cholesteryl stearate as coolant additive the average reduction in the average roughness Ra of the turned surface reached 1.25 times as compared with an additive-free coolant. 2. The effect of use the cholesteryl stearate as cutting fluid additive slightly depends on cutting speed. The maximum reduction (1.26-1.35 times as compared with additive-free cutting fluid) of average roughness Ra of turned surface is obtained at the medium and higher cutting speeds (i. e. 176-267 m/min.). 3. The concentration of cholesteryl stearate in cutting fluid does not impact the roughness of turned surface within the concentration variation range. It is advisable to use the liquid crystal at the lowest concentration 0.1% and reduce the machining costs.