Investigation of the effect of oil-based MWFs with enhanced tribological properties on cutting forces and roughness of the processed surfaces

Introduction. One way to enhance the efficiency of the cutting process is to develop new effective compositions of metalworking fluids (MWFs), which will reduce cutting force and temperature, while increasing the durability of the cutting tool and the quality of the processed surface. One approach to address this challenge is the chemical activation of MWF using additives based on nanoclay minerals, which are characterized by low cost and abundant reserves in-Earth. In this regard, the theoretical rationale for the selection of this additive and its impact on the tribological properties of the MWF is given. The purpose of the work is to determine the effect of oil-based additives with nanoclay minerals on reducing the cutting force, as well as improving the quality of the processed surface when drilling corrosion-resistant steel. Research methods. Experimental investigations were conducted during a drilling operation, in which the components of the cutting force were recorded using a three-component dynamometer M-30-3-6k. The aim of the experiment was to determine the effect of oil-based MWF containing additives from nanoclay minerals on the component of the cutting force, as well as the roughness of the processed surface. A formula for calculating the friction coefficient in the drilling process was derived using mathematical modeling. Results and Discussion. The experimental investigations yielded results demonstrating the effectiveness of using oil-based MWF with additives made from nanoclay minerals. Experimental data was obtained for the friction coefficient, cutting force component, as well as the roughness of the processed surface during drilling. These results were obtained using the experimental MWF, supplied to the cutting zone. The results of the study showed the effectiveness of using the modified MWF compared to traditional compositions. Conclusions. The modified MWF, which includes sunflower oil and nanoclay minerals as additives, significantly reduces the friction coefficient, cutting force, as well as the roughness of the processed surface, which opens up further prospects for its use in the metalworking industry.