OBRABOTKAMETALLOV MATERIAL SCIENCE Том 23 № 3 2021 EQUIPMEN . INSTRUM TS Vol. 4 No. 1 2022 Ta b l e 3 The change in the probability of material removing along the contact zone at different levels depends on the values of the relative vibrations of the grinding wheel and the workpiece during grinding holes z, m ( ) P M , Hz 100 200 300 400 = 0.3 , m f y t –0.36 0.925 0.816 0.984 0.973 –0.27 0.977 0.931 0.994 0.992 –0.18 0.995 0.958 0.998 0.997 –0.09 0.999 0.987 0.999 0.999 0 1 0.997 1 1 0.09 1 0.999 1 1 0.18 1 1 1 1 0.27 1 1 1 1 0.36 1 1 1 1 = 0.6 , m f y t –0.27 0.769 0.477 0.623 0.844 –0.20 0.853 0.548 0.652 0.876 –0.14 0.914 0.652 0.699 0.899 –0.07 0.953 0.763 0.769 0.922 0 0.976 0.855 0.843 0.947 0.07 0.988 0.917 0.901 0.963 0.014 0.994 0.954 0.929 0.977 0.20 0.997 0.974 0.961 0.984 0.27 0.999 0.985 0.974 0.989 = 0.9 , m f y t –0.14 0.576 0.488 0.45 0.465 –0.11 0.608 0.515 0.463 0.466 –0.07 0.639 0.546 0.485 0.475 –0.03 0.669 0.579 0.514 0.497 0 0.698 0.612 0.548 0.526 0.03 0.724 0.644 0.581 0.558 0.07 0.749 0.673 0.613 0.587 0.11 0.770 0.699 0.64 0.61 0.14 0.788 0.721 0.661 0.629 The analysis of the data obtained gives a clear illustration of the patterns of material removal along the contact zone at different levels at different frequencies of the relative oscillations of the grinding wheel and the workpiece. The data obtained show that when passing the surface of the contact zone of the wheel with the workpiece, the probability of metal removing increases within the actual depth of cut, and decreases with an increase in the frequency of relative vibrations of the tool and the workpiece at all levels. The probability increases most intensively at the value when the abrasive grains pass through the main plane. This is explained by the fact that during this period the depth of cut is maximum and the largest number of abrasive grains is involved in cutting. Due to the presence of vibrations, the removal still grows intensively even after the grains have passed the level of the main plane.
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