OPTIMIZATION OF FINISHING BLADE PROCESSING MODES
The use of cutting fluids in the process of metal cutting in the steam phase allows to increase the resistance of the tool sensitive to temperature changes, to reduce the consumption of cutting fluids, to increase the accuracy of processing due to the reduction of thermal deformations. The most effective is the use of cutting fluids in the steam phase during finishing operations. The paper deals with finding the optimal composition of the cutting fluids for supply in the steam phase in the operation of finishing blade processing. The experiment was carried out on the operation of external turning of steel 45 through cutter with carbide plate T15K6 on the lathe. In the processing of fixed dimension the wear and the coefficient of thickening of the chip. A steam generator of flow type was designed to produce steam. The design of the steam generator housing has minimal heat and electrical conductivity. The steam generator is installed on the support of the machine and the nozzle is fixed on the tool holder, providing the supply of cutting fluids, to the processing zone. Various classes of industrially produced sawdust recommended for blade processing, which had water, glycol and oil base, were tested. It turned out that in the steam state water cutting fluids on the glycol basis are more effective. Finding the optimal concentration of additives was carried out using the simplex method for blade cutting operations. The results of the experiments show that the closure of the simplices occurred around the point of the ratio of concentrations X1=1,34; X2=0,5; X3=0,56, where X1 - sulfurated copper stearate, X2 - glycerin, X3 - nickel stearate. We believe that as a result of adsorption on the metal surface will form physical layers of fatty acid salts with alternating molecules of glycerol - stearate. As a result of triboactivation, a reaction of substitution of nickel atoms by iron atoms with the formation of iron stearate will occur at the site of real contact. In turn, nickel atoms will form a solid solution on the surface. The resulting new phase will be a catalyst for the separation of copper from the stearate and the growth of the crystal lattice containing copper, iron and sulfur with the proposed formula CuFeS2. It was found the optimal value of the spindle speed for the selected cutting conditions.