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由于滚齿的切削条件限制较严,而且滚刀没有较大的正的切削前角,因此对典型的滚削来讲,这恰恰是影响滚刀寿命的主要因素。一位苏联工程师介绍了一个简单的方法可以明显地延长滚刀的寿命。其主要方法是;在滚刀的切削刃口顶部磨出一个小台阶,如附图。这就产生了一个正的切削前角,可以促使排屑流畅,达到延长滚刀寿命的目的。为了避免与正常齿形的干涉,台阶长度ι要限制在齿根高的非工作部位。根据台阶长度ι计算公式,算出的结果,当台阶形成的前角α是10°—15°时,对模数4—9的齿轮来说,其台
Because of hobbing cutting conditions more stringent, and the hob no larger positive rake angle, so typical hobbing speaking, this is precisely the main factor affecting hob life. A Soviet engineer introduced a simple way to significantly extend the hob life. The main method is; in the cutting edge of the hob grinding a small step, as shown in the drawings. This produces a positive cutting anterior horn, can promote chip fluff, to extend the hob life. In order to avoid interference with the normal tooth profile, the length of the step ι should be limited to the non-working part with high root. According to the calculation of the length of the step ι formula, the calculated results, when the step angle α is formed when the stage is 10 ° -15 °, the modulus 4-9 of the gear, its station