THE AREA OF RATIONAL APPLICATION OF SKIF-M INTERLOCKING SIDE MILL WHEN MACHINING WORKPIECES WITH A VERY HARD LAYER

The study objective is to define the rational parameters of the cutting mode with a special SKIF-M interlocking side mill for superhard (HRC 65 and more) surfacing. The study results: the rational application of an interlocking side mill in comparison with monolithic carbide end mills is shown, the area of rational parameters of the cutting mode with this mill is defined. It is also found out that the most rational use of this mill is at a cutting speed of 50 m/min, a cutting depth of 2 mm and a feed per milling tooth of 0.05 mm. It is shown that increasing the cutting speed, cutting depth, or feeding to the tooth is irrational. Conclusions: 1. The goal was achieved by experimentally examining the mill operability according to the wear resistance period of 0.5 mm under different operating conditions. 2. It is found out that the durability period decreases significantly with increasing cutting depth and becomes critical at cutting depth of 3 mm. The novelty of the work: the areas of rational use of a special SKIF-M mill for machining surfacing of HRC 65 and more have been established.