High-precision hardened tooth surface gear and machining method thereof

The invention discloses a machining method of a high-precision hardened face gear. The machining method comprises the following steps that a disc milling cutter is adopted for conducting pre-compensation gear milling on a forged gear blank; the forming molded line of the disc milling cutter is obtained through a generating method and a forming method; after gear milling, the gear is subjected to carburizing, quenching and destressing, and gear grinding is formed; and after the gear is formed and ground, the gear is subjected to surface finishing machining. According to the method, the tooth allowance difference of the gear subjected to heat treatment can be reduced, the tooth surface hardness difference of the gear prepared through the method is smaller than or equal to 1 HRC, the hardened layer depth difference is smaller than or equal to 0.2 mm, and the gear has good part fatigue strength. 本发明公开了一种高精度硬齿面齿轮的加工方法，包括以下步骤：采用盘铣刀对锻造好的齿坯进行预补偿铣齿；所述盘铣刀的成形型线通过展成法与成型法得到；铣齿后，对齿轮进行渗碳淬火并去应力，成形磨齿；成形磨齿后，对齿轮进行表面光整加工。本发明可使得热