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The Analysis of Bearing Life of Drive Gear Box of NC Gear Shaping Machine Based on Romax

As the key system of NC gear shaping machine, the principle property of the drive transmission system have a decisive influence upon a complete machine. The virtual prototype of drive gear transmission system was created by Romax analysis software in this paper, and made simulation after establishing some constraint conditions according to the working conditions. Both ISO 281 and Romax Adjusted are applied to analyze and predict fatigue life of each bearing, then through using the principle of Miner, all the damage percentage were added together under different conditions. The results showed that all bearings used in the virtual prototype of drive gear transmission system meet the requirements of mechanical performances. This study provides theory basis for follow-up design and optimization on NC gear shaping machines drive transmission system.