精度要求较高的大内齿轮,一般应用展成法在大型插齿机上加工。在没有这种设备的情况下,可以在普通大插床上,采用仿形法分度插削;或是在滚齿机上改装,用齿形圆铣刀加工。但是,这些方法不但质量不能保证,而且生产效率很低。为了解决这个问题,在无产阶级文化大革命高潮中,我厂工人、技术人员和领导干部一起,改装了一台老式中型滚齿机,取掉原来的 Large internal gear with high precision requirements, the general application of the development method in the large gear shaper processing. In the absence of such equipment, can be used in ordinary large slotting machine, gravitation indexing interpolation; or hobbing machine modification, with a toothed circular milling cutter. However, these methods are not only not guaranteed in quality but also inefficient in production. In order to solve this problem, at the climax of the Great Proletarian Cultural Revolution, our factory workers, technicians and leading cadres reworked an old medium-sized gear hobbing machine to remove the original