Recent experiments show that a gear conventionally hobbed runs longer when its installed so that the flanks with lowest residual stress carry the working loads (are the driving side). Engineers with the Instrumented Factory (INFAC) for Gears, Chicago, produced gears by two methods and then measured their residual stresses on flanks and roots using X-ray methods. The research examined different levels of residual stresses generated by two different cutting operations (conventional and climb hobbing) and determined the effects of variations in cutting speed and feed on the residual stress levels.
展开▼
