摘要
针对铝合金无缝管的挤压成型工艺,设计7075铝合金无缝管的挤压模具和穿孔针,建立有限元分析模型,利用DEFORM V6.1有限元软件的数值模拟与仿真计算,分析不同挤压温度和速度对挤压力、内部温度场、应力分布的影响.结果表明,7075铝合金无缝管挤压模拟过程中,挤压温度在400℃~500℃的范围内,挤压速度在5 mm/s~8 mm/s的范围内,挤压速度和挤压温度都对挤压力的大小有较大的影响.挤压速度越高时,挤压温度对挤压力的影响效果越明显;挤压温度越高时,挤压速度对挤压力的影响效果越明显;挤压温度升高,挤压筒内未产生大变形区域等效应力降低,管材靠近模孔处附加拉应力增大;挤压速度升高,应变分布不均匀性增大.为获得高品质的7075铝合金无缝管,应严格对挤压温度-速度工艺进行调控,并控制好管材出模孔温度.
In this paper,the extrusion die and perforation needle of 7075 aluminum alloy seamless tube are designed for the extrusion molding process of aluminum alloy seamless tube,and the finite element analysis model is established.The influence of different extrusion temperature and speed on extrusion pressure,internal temperature field and stress distribution is analyzed by using the numerical simulation and simulation calculation of DEFORM V6.1 finite element software.The results show that both the extrusion speed and the extrusion temperature have a great influence on the extrusion pressure.When the extrusion temperature is 500℃and the extrusion speed is 5 mm/s,the extrusion pressure is the lowest,which is 7.6 t,and when the extrusion temperature is 400℃and the extrusion speed is 8 mm/s,the extrusion is carried out with the largest force of 12.38 t.
作者
张焱
梁淇
肖朝阳
郑森琳
唐宇
ZHANG Yan;LIANG Qi;XIAO Zhaoyang;ZHENG Senlin;TANG Yu(School of Mechanical Engineering,Hunan Institute of Science and Technology,Yueyang 414006,China)
出处
《湖南理工学院学报（自然科学版）》
CAS
2021年第1期50-56,共7页
Journal of Hunan Institute of Science and Technology(Natural Sciences)
基金
湖南省电磁装备设计与制造重点实验室开放基金项目(DC201904)
湖南省大学生创新创业训练计划项目(湘教通[2019]219号-1770)。
关键词
铝合金无缝管
挤压成型
有限元分析
数值模拟
aluminum alloy seamless tube
extrusion forming
finite element analysis
numerical simulation
