在Y236机床上加工模数2.5毫米以上的伞齿轮时,通常是用标准成形刀粗切之后,精光加工来完成。但标准成形刀在加工时,顶刃前角为零,所以,切削时机床受力较大,尤其是在粗切大模数齿轮时,这种现象就更加突出。为了克服刀具在加工时的这一弱点,我们试制了一个伞齿轮开坯组合工具(图1)。经过几年的应用,这种工具效果良好,特别是加工模数较大、数量较多的伞齿轮时,效果就更为显著。 When machining a bevel gear with a modulus of 2.5 mm or more on a Y236 machine, it is usually finished by rough machining with a standard forming knife. However, the standard forming knife in the processing, the top edge of the rake angle is zero, so cutting machine stress, especially in roughing large modulus gear, this phenomenon is even more prominent. To overcome this weakness of the tool during machining, we prototyped a bevel gear combination tool (Figure 1). After several years of application, this tool works well, especially when the processing modulus is larger and the number of bevel gears is more effective.