齿环热精锻成形工艺参数优化及组合模具设计  

Parameter optimization and design of combined die for hot precisionforging process of synchronizer ring

作　　者：梁强 徐永航 李平 程惠峰[1] 谢德清 LIANG Qiang;XU Yong-hang;LI Ping;CHENG Hui-feng;XIE De-qing(School of Mechanical Engineering,Chongqing Technology and Business University,Chongqing 400067,China)

机构地区：[1]重庆工商大学机械工程学院,重庆400067

出　　处：《塑性工程学报》2024年第6期50-58,共9页Journal of Plasticity Engineering

基　　金：重庆市自然科学基金资助项目(CSTB2022NSCQ-MSX0473);重庆市高校创新研究群体项目(CXQT21024)。

摘　　要：针对某齿环热精锻成形材料利用率低、模具寿命短的问题,构建了齿环热精锻成形有限元模型,分析了齿环热精锻成形过程中金属塑性流动规律及各物理量的变化情况。其次,以避免齿环成形缺陷、提高材料利用率和降低最大成形载荷为目标,采用响应面法和灰狼优化算法优化了齿环的坯料尺寸、始锻温度和成形速度,并通过数值模拟仿真和工艺实验进行了验证。最后,设计了齿环热精锻成形组合凹模结构,通过数值模拟优化了组合凹模的过盈量,模具危险区域的最大主应力值降至945 MPa,改善了模具应力集中现象,有效避免了模具的早期失效。Aiming at the problems of low material utilization ratio and short service life of hot precision forging of a synchronizer ring,the finite element model for the hot precision forging process of synchronizer ring was constructed to analyze the plastic flow law of the metal and the changes of each physical quantity in the process of hot precision forging.Secondly,the response surface method and grey wolf optimization algorithm were used to optimize the workpiece size of synchronizer ring,initial forging temperature and forming speed to avoid forming defects,improve the material utilization and reduce the maximum forming load.The numerical simulation and process experiments were carried out to verify the results.Finally,the combined die structure of synchronizer ring hot precision forging was designed.The interference of the combined die was optimized by numerical simulation,and the maximum principal stress in the dangerous area of the die was reduced to 945 MPa,the stress concentration phenomenon of the die was improved and the early failure of the die was effectively avoid.

关 键 词：齿环 热精锻 工艺参数优化 组合模具设计 

分 类 号：TG316[金属学及工艺—金属压力加工]