载重汽车用直齿轮冷挤压组合凹模的优化设计

发布时间：2018-05-09 12:37

本文选题：大模数直齿轮 + 冷挤压　；参考：《中南大学学报(自然科学版)》2017年11期

【摘要】：为提高载重汽车用直齿轮冷挤压组合凹模的使用寿命,以组合凹模的齿形腔等效内径、直径比和过盈系数为设计变量,以降低模芯内壁等效应力为优化目标,建立组合凹模结构参数与等效应力的Kriging模型。应用Kriging模型结合粒子群算法,在可行变量空间内寻优,得到组合凹模最佳结构尺寸为:模芯外径D_2=107.485 mm,中圈外径D_3=187.215 mm,外圈外径D_4=274.839 mm,模芯与中圈的单边径向过盈量U_1=0.134 mm,中圈与外圈的单边径向过盈量U_2=0.253 mm,采用优化后的组合凹模进行数值模拟。研究结果表明:在模芯消气带齿槽处等效应力最大,其值为1 870 MPa。优化方法为齿类零件冷挤压成形组合凹模设计提供了定量的确定方法。
[Abstract]:In order to improve the service life of the straight gear cold extrusion combined die for truck, the equivalent inner diameter, diameter ratio and interference coefficient of the tooth cavity of the combined die are taken as the design variables, and the effective stress of the inner wall of the die core is reduced as the optimization objective. The Kriging model of combined die structure parameters and equivalent stress is established. Using Kriging model and particle swarm optimization algorithm, we can find the optimum in the feasible variable space. The optimum structural dimensions of the combined die are as follows: core diameter D2107.485 mm, middle ring diameter D3 187.215 mm, outer ring diameter D 4 4n 274.839 mm, unilateral radial interference between core and center ring U 1n 0.134 mm, unilateral radial interference between middle ring and outer ring U 20.253 mm. The optimized combination is adopted. The die is simulated numerically. The results show that the equivalent stress at the groove of the die core is the largest, and its value is 1 870 MPA. The optimization method provides a quantitative determination method for the design of the combined die for cold extrusion forming of tooth parts.
【作者单位】：重庆大学材料科学与工程学院;重庆众联齿轮传动有限公司;
【基金】：国家自然科学基金资助项目(51275543) 重庆市科委应用开发项目(cstc2014yykf C70003)~~
【分类号】：TG375.41

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