重合度对齿轮径向滚轧成形分齿精度的影响

Effect of contact ratio on dividing teeth accuracy in gear radial rolling forming

为了探究滚轧分齿精度的影响因素及其变化规律,根据齿轮径向滚轧成形特点,建立了齿轮滚轧成形过程中轧轮与坯件的重合度数学模型,揭示了轧轮齿数、初始压入深度、坯件齿数、压力角、中心距与重合度之间的映射关系,以及对初始分齿精度的影响规律。此外,利用Deform有限元软件和滚轧实验分析了轧轮齿数、初始压入深度、坯件齿数和摩擦系数对分齿精度的影响及其显著性。结果表明,轧轮齿数、初始压入深度、坯件齿数和摩擦系数的增加有利于提高滚轧初始分齿精度,而初始压入深度、坯件齿数和摩擦系数是影响分齿精度的主要因素。

To explore the influence factors and the change law of dividing teeth accuracy,according to the characteristics of gear radial rolling forming,a mathematical model of contact ratio between rolling wheel and blank in gear rolling forming process was proposed.The mapping relationship between the teeth number of rolling wheel,initial pressed depth,teeth number of blank,pressure angle,center distance and contact ratio,as well as the influence law on the initial dividing teeth accuracy was revealed.Moreover,DEFORM finite element software and rolling experiments were used to analyze the influence and significance of the teeth number of rolling wheel,initial pressed depth,teeth number of blank and friction coefficient on dividing teeth accuracy.The results show that the increase of teeth number of rolling wheel,initial pressed depth,teeth number of blank and friction coefficient is beneficial to improving the initial dividing teeth accuracy.And the initial pressed depth,teeth number of blank and friction coefficient are the primary factors affecting the dividing teeth accuracy.