华南理工大学学报（自然科学版）2025，Vol.53Issue(5)：45-55,11.DOI:10.12141/j.issn.1000-565X.240397
轨道用中空薄壁大小幅铝型材的挤压规律分析
Analysis of Extrusion Law of Large-Scale and Small-Scale Aluminum Profiles with Hollow Thin Wall for Rails
摘要
Abstract
In order to explore the extrusion law of large-scale and small-scale hollow thin-wall aluminum profiles for rails,simulation software HyperXtrude is used to numerically simulate the extrusion process of the profiles,the influences of mold structure and process parameters on the extrusion are analyzed,and the forming rules of two large-scale and small-scale profiles with similar shapes are compared.The results show that,in terms of mold structure,the modification of welding chamber and drainage groove has the most obvious influence on large-scale and small-scale profiles,for instance,the change in welding chamber significantly reduce the maximum deformation of the small-scale profile,with a reduction of 42.82%,while that for the large-scale profile is 25.34%.The change in drainage groove structure shows different impact trends—after altering the drainage groove,the maximum deformation reduction of the large-scale profile is 40.88%,while that of the small-scale profile is 24.72%.The drainage groove of small-scale profile is relatively shorter,and the modification of the drainage groove of large-scale profile is more complicated,so that the change of drainage groove has a more significant impact on large-scale profile.Moreover,in terms of process parameters,according to the changes of metal deformation,metal flow rate and the SDV values of the profile exit section under different conditions,it is found that the extrusion speed and the die temperature have more significant impact on the large-scale profile,while the billet diameter has a more pronounced effect on the small-scale profile.This research provides theoretical support for optimizing the extrusion process of aluminum profiles.关键词
铝型材/挤压成型/模具结构/工艺参数/数值模拟Key words
aluminum profile/extrusion sharping/mold structure/process parameter/numerical simulation分类
矿业与冶金引用本文复制引用
刘国勇,高士泽,朱冬梅..轨道用中空薄壁大小幅铝型材的挤压规律分析[J].华南理工大学学报（自然科学版）,2025,53(5):45-55,11.基金项目
广东省重点领域研发计划项目(2020B010186002) Supported by the Key Field Research and Development Plan of Guangdong Province(2020B010186002) （2020B010186002）
