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设计重要用途的阶梯轴时,一般对大小截面过渡处都规定较大的圆角半径。通常取圆角半径与轴直径之比为R/d≥0.06。这是保证轴的疲劳强度有足够安全系数的重要手段。但有时却须要加大轴颈长度。因而不可避免地要增加轴的总长度和重量。 试验证明,在一定规范下,用冷挤压的方法使轴的过渡圆角产生应变,与切削加工的大圆角轴相比,可以大大减小圆角半径,而不致
When designing a ladder shaft for an important purpose, generally a large fillet radius is provided for the transition at the size of the cross section. Usually rounding radius and shaft diameter ratio R / d ≥ 0.06. This is an important means of ensuring a sufficient safety factor for the fatigue strength of the shaft. But sometimes you need to increase the length of the journal. It is inevitable to increase the overall length and weight of the shaft. Tests show that under certain specifications, the method of cold extrusion shaft transition fillet strain, compared with the machined large round shaft, you can greatly reduce the fillet radius, not to