Experimental Investigation on Anti-Fatigue Function of Gear Surface with Grid Micro-Morphology

Based on the experimental optimal designing method, the experimental plan was set up. In order to study anti-fatigue capability of the gear, the laser engraving technology was applied to process the grid type bionic micro-morphology texture on the gear teeth surface. Different anti-fatigue characteristics of the bionic samples were obtained through analyzing the fatigue tests results. The results showed that the pitting ratio of the gear specimens with the grid micro-morphology had been decreased obviously. The grid bionic surface micro-morphology on the gear had improved the anti-fatigue capability of the gear to 139%, and mechanism of anti-fatigue of the bionic gear was ascribed to “Dam Effect”, laser strengthen and changing of lubrication.