MAYBORODA V.S., GLUSHKO V.S. ENERGY EFFICIENCY OF PULSE HIGH-SPEED TOOTH MILLING TAKING INTO ACCOUNT THE ATOMIC APPROACH

The mechanism of formation of connected (segmented) chips at high speeds of tooth milling is considered. It is shown that this phenomenon is associated with an increase in the yield point of the metal and a decrease in its plasticity with an increase in the cutting speed and, therefore, the deformation speed. An increase in the rate of deformation with an increase in the cutting speed creates a less energy-intensive fragile mechanism for the destruction of chip elements. This, in turn, leads to a decrease in the degree of deformation of the cut layer, cutting forces and chip shrinkage. The effect of the type of crystal lattice of the processed material on the appearance of the chip is manifested through the stacking fracture energy, which affects the formation of the dislocation structure in the chip formation zone, which determines the initial parameters of the cutting process: resistance to plastic deformation, cutting forces, the degree of deformation and shrinkage of the cut layer. The application of the atomic approach opens up wide possibilities for improving high-speed pulsed tooth milling, in particular, improving the energy efficiency of milling. The dependences between physical parameters during high-speed tooth milling were determined: power, cutting speed, energy of breaking interatomic bonds in metal clusters. Two ways of increasing the energy efficiency of pulsed high-speed tooth milling were found: a possible reduction in the power of the driving electric motor and the use of the energy of breaking interatomic bonds in subsequent milling.