渐开线拟合矩形花键滚刀齿形及齿顶圆角计算

Calculation of Tooth Profile and Top Fillet Based on Involute Fitting Hob of Rectangle Spline

矩形花键滚刀齿形一般采用圆弧来代替,致使滚刀齿形误差增大。无圆角矩形花键滚刀磨损较快,加工的工件齿根呈锯齿状,容易产生应力集中,而现有设计理论并没有规定矩形花键滚刀齿顶的具体设计方法。本文通过滚齿啮合原理,推导出渐开线拟合矩形花键滚刀齿形及齿顶圆角的计算方法。

In order to facilitate manufacturing,the tooth profile of the rectangular spline hob is usually replaced by arcs. The rectangular spline hob with no top fillet is quickly wear out,tending to result in stress concentration,the tooth root of the machined spline is serrated. And the present theory has no specification for the design of the top fillet of the rectangular spline hob. In this paper,based on the principle hob,the calculation method of the involute fitting tooth profile and the top fillet of the hob for rectangular splines are derived.