直齿伞齿轮一般必须在专用机床上加工,才能达到应有的精度。但检修部门往往缺乏这种机床,只好在铣床上加工,由于渐开线齿形不易铣准确,表面毛糙,因此达不到质量要求。随着生产的不断发展,这个矛盾更为突出。面对这种困难,我们学习毛主席著作,毛主席在《关于重庆谈判》中说:“什么叫工作,工作就是斗争。那些地方有困难、有问题,需要我们去解决。我们是为着解决困难 Straight bevel gear generally must be processed on a special machine to achieve the desired accuracy. However, the maintenance department often lack of such machine tools, had to be processed on the milling machine, because involute tooth shape is not easy to mill accurate, rough surface, so reach the quality requirements. With the continuous development of production, this contradiction is even more prominent. Faced with this difficulty, we study Chairman Mao’s work. Chairman Mao said in the "Chongqing Negotiation: What is work and work is the struggle? Where are the problems and problems that we need to solve? difficult