复合挤压在铝合金轮毂成形中的应用研究  

Application of compound extrusion in aluminum alloy wheel hub forming

作　　者：王强[1] 孟模[1] 房庆龄 张治民[1] WANG Qiang;MENG Mu;FANG Qing-ling;ZHANG Zhi-min(National Defense Innovation Center of Extrusion Forming Technology for Complex Components,College of Materials Science and Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学材料科学与工程学院国防科技工业复杂构件挤压成形技术创新中心,山西太原030051

出　　处：《塑性工程学报》2020年第12期18-23,共6页Journal of Plasticity Engineering

基　　金：国家重点研发计划项目(2016YFB0301103-3)。

摘　　要：在正向-反向-径向复合挤压及其金属流动行为研究的基础上,围绕重型车辆传统钢制轮毂难以减重的问题,针对轮毂结构、服役要求以及复合挤压成形的特点,提出了铝合金轮毂正向-反向-径向复合挤压成形新方法,结合数值模拟和实验研究,分析了坯料尺寸、摩擦因子以及模具圆角半径等工艺参数对等效应变的影响。控制了金属的有序定向流动,提高了挤压变形均匀性,缩短了成形工艺流程,实现了某铝合金轮毂的挤压成形,相较传统钢制轮毂减重达60%,为重型车辆轻量化提供了新途径。Based on the study of forward-backward-radial compound extrusion and its metal flow behavior,aiming at the problem that the traditional steel wheel hub for heavy vehicle was difficult to reduce weight,combined with the structure of wheel hub,service requirements and the characteristics of compound extrusion forming,a new forward-backward-radial compound extrusion forming method for aluminum alloy wheel hub was proposed.Combining with the numerical simulation and experimental study,the influence of process parameters such as billet size,friction coefficient and die fillet radius on equivalent strain was analyzed.The ordered and directional flow of metal is controlled.The uniformity of extrusion deformation is greatly improved and the extrusion forming process is shortened.The extrusion forming of aluminum alloy wheel hub is realized,and compared with traditional steel wheel hub,the weight is reduced by 60%,which provides a new path for the lightweight of heavy vehicles.

关 键 词：复合挤压 铝合金轮毂 金属流动 变形均匀性 

分 类 号：TG416.2[金属学及工艺—焊接]