中国铸造装备与技术2024，Vol.59Issue(1) ：57-63.DOI:10.3969/j.issn.1006-9658.2024.01.012

工业纯铝管挤压成形过程的数值模拟

Numerical simulation of the extrusion forming process of industrial pure aluminum tubes

陈一郡 杨进 李正龙 赵飞 陈朝轶 兰元培 王林珠
中国铸造装备与技术2024，Vol.59Issue(1) ：57-63.DOI:10.3969/j.issn.1006-9658.2024.01.012
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工业纯铝管挤压成形过程的数值模拟

Numerical simulation of the extrusion forming process of industrial pure aluminum tubes

陈一郡 1杨进 1李正龙 2赵飞 1陈朝轶 1兰元培 1王林珠1
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作者信息

  • 1. 贵州大学材料与冶金学院,贵州贵阳 550025
  • 2. 遵义恒佳铝业有限公司,贵州遵义 563100
  • 折叠

摘要

针对连续挤压法生产制冷铝管过程中经常出现的焊合不良、尺寸超差和壁厚不均匀以及力学性能不达标等问题,利用DEFORM-3D有限元软件对铝管的挤压过程进行数值模拟,分析挤压温度和速度对温度场、应力场和晶粒尺寸的影响,为挤压工艺参数优化提供指导.结果表明:挤压速度一定时,定径带出口温度随胚料预热温度的升高而增加,应力随着挤压温度升高逐渐降低,平均晶粒尺寸随着挤压温度的增加而变大.挤压温度一定时,出模孔温度随挤压速度升高而增加,应力峰值随着挤压速度的增加呈先增大后降低的趋势,平均晶粒尺寸随着挤压速度的增加呈逐渐降低的趋势,管材焊缝处的晶粒尺寸比基材小.在此模拟条件下最佳工艺参数为460 ℃、25 mm/s,铝管和焊缝的晶粒尺寸分别为24.7 μm和24.3 μm.

Abstract

In order to solve the problems of poor welding,out-of-size,uneven wall thickness and sub-standard mechanical properties in the process of continuous extrusion of refrigerated aluminum tube,DEFORM-3D finite element software was used to numerically simulate the extrusion process of alu-minum tube,and to analyze the effects of extrusion temperature and velocity on temperature field,stress field and grain size,providing guidance for the optimization of extrusion process parameters.The results show that when the extrusion speed is constant,the outlet temperature of the sizing zone increases with the increase of the preheating temperature of the blank,the stress decreases with the increase of the extrusion temperature,and the average grain size increases with the increase of the extrusion tempera-ture.When the extrusion temperature is constant,the temperature of the die hole increases with the in-crease of the extrusion speed,the stress peak increases first and then decreases with the increase of the extrusion speed,and the average grain size gradually decreases with the increase of the extrusion speed,and the grain size at the weld is smaller than that of the substrate.Under the simulated conditions,the optimum process parameters are 460 ℃,25 mm/s,and the grain sizes of aluminum tube and weld are 24.7 μm and 24.3 μm,respectively.

关键词

铝管/挤压成形/挤压温度/挤压速度/数值模拟

Key words

Aluminum tube/Extrusion forming/Extrusion temperature/Extrusion speed/Numerical sim-ulation

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出版年

2024
中国铸造装备与技术
济南铸造锻压机械研究所有限公司 中国机械工程学会

中国铸造装备与技术

影响因子：0.195
ISSN：1006-9658
参考文献量13
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