摘要
The YC 31125 hardened gear hobbingmachine was developed by theChongqing Machine Tools Works. Itworks according to the principle of continuousscale division: it can cut spur and helicalgears, and chain and worm wheels. Thanksto its rigidness, it can semi-finish or finishhardened gears by the hobbing method usinga carbide hob. In this way, hardened gearscan be efficiently finished by hobbingoperation instead of the grinding method,with higher precision and productionefficiency. When hobbing spur gears,
