目前,机床行业中加工7—6—6精度的齿轮,多采用滚齿(或插齿)→剃齿→热处理→齿形精整加工的工艺路线。具有较完善齿形加工设备的机械加工企业,热处理前使齿轮精度达到7—6—6。但是除齿圈外,齿轮花键孔或圆孔在热处理过程中的变形,必须进行修正,多数工厂是用推孔 Currently, the machine tool industry in the processing of 7-6-6 precision gear, the use of hobbing (or gear shaving) → shaving → heat treatment → profile finishing process. Machining companies with better toothed processing equipment, gear precision before heat treatment up to 7-6-6. However, in addition to the gear ring, the gear spline hole or hole deformation in the heat treatment process, must be amended, the majority of the factory is to use the hole