摘要:在弧齿锥齿轮冷精整工艺过程中,热锻模具齿形的优化对于改善冷精整过程中齿面金属流动特性,解决齿顶尖部填充不满,以及啮合传动噪声的现象具有显著效果.选用农机变速箱齿轮,基于该齿轮功率大、 强度高、 工作环境为低速大负荷等特点,对齿轮模型进行精确建模,并进行TCA分析,通过导入齿面点的方式得到模腔模型.采用控制变量和数值模拟相结合的方法,改变刀盘直径将齿面修鼓.运用有限元软件DEFORM-3D,对成形过程进行模拟,对比观察两种齿面的速度矢量,解释了修形对改善金属流动方向的合理性.通过开模试验,进一步证实了该修形方法对于改善弧齿锥齿轮齿顶尖部填充不满,解决生产中存在的折叠、 裂纹等缺陷具有显著优势.%In the spiral bevel gear of cold finishing process, optimization of hot forging die tooth to improve the flow characteris-tics of the cold finishing process of tooth filled metal, the top discontent is solved, and the phenomenon of gear transmission noise has a significant effect.This selection of agricultural machinery based on the gear transmission gearbox, big power, high strength, working environment for the low speed and high load characteristics, accurate modeling of gear model, and Tooth Contact Analysis (TCA), the cavity model was obtained by introducing tooth surface point way.The control variable method and numerical simulation were combined with the change of cutter diameter repairing tooth surface of the drum.The finite element software DEFORM-3D was used to simulate the forming process, and the velocity vector of the two kinds of tooth surfaces were observed and compared to explain the rationality of improving metal flow direction by modified method.Through the open model test, further confirmed that the modified method has a sig-nificant advantage in improving the filling of the top of the spiral bevel gear and solving the problems such as folding and crack.