直廓环面蜗轮副的加工,经历了原始型、倒坡修型和对称修型(全修型)三个不同的发展阶段,相应的加工刀具也完成了原始滚刀——双飞刀——修型滚刀的发展。双飞刀替代了原始滚刀,不仅解决了滚刀制造复杂的关键,而且大大提高了切削效率,使其加工制造得以普及和扩展,但是,双飞刀不能切出蜗轮齿面的洼坑展成区,所以,被能切出大而深的洼坑展成 Straight profile toroidal worm gear processing, has undergone three different stages of development of the original type, reverse type and symmetrical shape (full repair type), the corresponding processing tool also completed the original hob - double flying knife - Development of hob hob. Shuangfei knife instead of the original hob, hob not only solved the complexity of the key, but also greatly improve the cutting efficiency, so that its manufacturing can be extended and expanded, but the pair of flying knife can not cut the worm gear tooth surface of the exhibition area , So, can be cut into large and deep depression into