Journal of South China University of Technology(Natural Science) >

2025 , Vol. 53 >Issue 5: 45 - 55

DOI: https://doi.org/10.12141/j.issn.1000-565X.240397

Mechanical Engineering

Analysis of Extrusion Law of Large-Scale and Small-Scale Aluminum Profiles with Hollow Thin Wall for Rails

  • LIU Guoyong ,
  • GAO Shize ,
  • ZHU Dongmei
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  • School of Mechanical Engineering，University of Science and Technology Beijing，Beijing 100083，China
刘国勇（1969—），男，博士，副教授，主要从事多物理场耦合建模与优化、机械装备力学行为研究。E-mail： gy_liu666@ustb.edu.cn

Received date: 2024-08-04

  Online published: 2024-10-25

Supported by

the Key Field Research and Development Plan of Guangdong Province(2020B010186002)

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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.

Key words： aluminum profile; extrusion sharping; mold structure; process parameter; numerical simulation

Cite this article

LIU Guoyong , GAO Shize , ZHU Dongmei . Analysis of Extrusion Law of Large-Scale and Small-Scale Aluminum Profiles with Hollow Thin Wall for Rails[J]. Journal of South China University of Technology(Natural Science), 2025 , 53(5) : 45 -55 . DOI: 10.12141/j.issn.1000-565X.240397

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