中南大学学报（自然科学版）2017，Vol.48Issue(11)：2881-2888,8.DOI:10.11817/j.issn.1672-7207.2017.11.006
载重汽车用直齿轮冷挤压组合凹模的优化设计
Optimization design of cold extrusion combined die for spur gear of camion
摘要
Abstract
In order to improve the service life of cold extrusion combined die for spur gear of camion, the equivalent diameter of tooth shaped cavity, diameter ratio and shrink fitting ratio of combined die were taken as design variables, the Kriging model of effective stress and structure parameters of the combined die was built, which aimed at decreasing the effective stress of the die insert. The Kriging model combined with the particle swarm optimization were used to find the optimal structure size of combined die in the variable space. The optimal structure sizes of the combined die were as follows: die insert diameterD2=107.485 mm, middle layer diameterD3=187.215 mm, stress ring diameterD4=274.839 mm, unilateral radial shrink fitting between die insert and middle layerU1=0.134 mm, unilateral radial shrink fitting between middle layer and stress ringU2=0.253 mm. Meanwhile, the numerical simulation method was also used to simulate the forming process with the optimized combined die. The results show that the maximum effective stress on the inside of die insert is obtained and the value is 1870 MPa. The optimization method provides a method for the design of cold extrusion combined die for gears.关键词
大模数直齿轮/冷挤压/组合凹模/优化设计Key words
spur gear with big modulus/cold extrusion/combined die/optimization design分类
矿业与冶金引用本文复制引用
梁强,周杰,何雄,夏泽雨,刘正伟..载重汽车用直齿轮冷挤压组合凹模的优化设计[J].中南大学学报（自然科学版）,2017,48(11):2881-2888,8.基金项目
国家自然科学基金资助项目(51275543) （51275543）
重庆市科委应用开发项目(cstc2014yykfC70003) (Project(51275543) supported by the National Natural Science Foundation of China （cstc2014yykfC70003）
Project(cstc2014yykfC70003) supported by the Science and Technology Application Development Program of Chongqing) （cstc2014yykfC70003）
