Investigation of ultrasonic vibrations influence on the effectiveness of technological lubricants

The authors studied sonification regimes of the ОГВ-75 lubricant based on water and graphite. The purpose of this research was to improve the lubricant efficiency when using it in metal forming processes at high temperatures. The ?Alpha-Bioton? oscillator with the operating frequency of 50-300 Hz was used to process the ОГВ-75 lubricant concentrate which had been previously diluted with water in the ratio 1:10. Processing time was 30, 60, 90 minutes, the amplitude of oscillation was 0,5-3,0 mm. The researchers evaluated the effectiveness of lubrication using two methods: the method of cylindrical samples with the lateral surface of the samples in the form of a parabola (S.I. Gubkin method); the method of ring patterns (A.N. Male and M.G. Cockcroft method). The authors have shown that when subjected to vibration at a frequency of 100 Hz for 60 minutes, the coefficient of friction of the ОГВ-75lubricant reduced by 16% (S.I. Gubkin method) and 30% (A.N. Male, M.G. Cockcroft method). The authors found that the coefficient of friction defined from the shape of the lateral surface of the samples is 26-47 % higher than defined from A.N. Male,M.G.Cockcroft method