Calculation model of the stressed state of the tooth contact zone of surface-hardened gears

Stress state of the surface layer in contact zone mating teeth cylindrical gears has been studied. It is established that stressed surfaces meshing pole characterized not only by stresses, but also deep equivalent stresses. shown under loading heterogeneous and changes with distance from surface. Analysis substantiation calculation model for diffusion surface-hardened are performed. Value coefficient, which takes into account influence normal stresses on efficiency tangential ones, specified. Reliability validity condition were estimated according to results full-scale bench tests made cemented steel 20ХГНР. The values tooth corrected considering load concentration across width cogged ring gear. Spalling depth damaged was determined measuring impressions taken each examined gear methacrylic resin. nucleation pitting 6.5 mm module occurrence calculated maximum shear consistency experimental data shows stress-strain involute gears.