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

作　　者：陈一郡 杨进 李正龙 赵飞[1] 陈朝轶[1] 兰元培 王林珠 CHEN Yijun;YANG Jin;LI Zhenglong;ZHAO Fei;CHEN Chaoyi;LAN Yuanpei;WANG Linzhu(College of Materials and Metallurgy,Guizhou University,Guiyang 550025,Guizhou China;Zunyi Hengjia Aluminum Co.Ltd.,Zunyi 563100,Guizhou China)

机构地区：[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

出　　处：《中国铸造装备与技术》2024年第1期57-63,共7页China Foundry Machinery & Technology

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24.7μm和24.3μm。In order to solve the problems of poor welding,out-of-size,uneven wall thickness and substandard 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 aluminum 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 temperature.When the extrusion temperature is constant,the temperature of the die hole increases with the increase 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 24.7μm and 24.3μm,respectively.

关 键 词：铝管 挤压成形 挤压温度 挤压速度 数值模拟 

分 类 号：TG379[金属学及工艺—金属压力加工]