|
摘要：
|
|
铝型材的分流焊合挤压相对于其它传统的挤压方法,在生产中空型的管类型材时具有非常大的优势。本文基于FEM方法,利用DEORM-3D对薄壁铝合金圆管型材进行了从分流-焊合-挤出成形的全过程模拟。得到了挤压过程中的网格变形图和行程载荷曲线。同时针对分流模变形抗力大的特点,进行了模具的受力变形分析,对挤压过程中模具可能出现的失效进行预测。模具应力分析结果表明,分流孔及其模芯处变形量大,应力集中明显,容易磨损,设计模具时应重点考虑这些部分,以提高模具寿命。其模拟结果为模具设计和工艺参数选择提供理论依据。
|
|
Porthole die extrusion has an obvious great advantage in producing hollow sections of Al alloy tubes com- pared with the traditional extrusion methods.The Al alloy tube was simulated from dividing-welding-extrusion forming based on FEA code DEFORM-3D using FEM.The deformation mesh and the strike-load curve were obtained.Mean- while,aiming at the porthole die's high deformation resistance,the die stress was analyzed.This could predict the pos- sible die invalidation during extrusion.Die stress analysis results show that large deformation and stress concentration occur at the portholes and the die core,which leads to wear and tear easily.In order to enhance porthole dies' service life,it is necessary to pay attention to these places when design porthole dies.The simulation results provide theoreti- cal instruction for mould design and selection of technological parameters.
|
|
基金项目：
|
|
|
|
作者简介：
|
|
|
|
参考文献：
|
[1]刘静安．铝型材挤压模具设计、制造、使用及维修[M]．北京：冶金工业出版社．2002．
[2]Xie J X,Murakami T,Ikeda K.et al.Experimental simula- tion of metal flow in porthole-die extrusion[J].Journal of Materials Processing Technology 1995,(49):1-11.
[3]Young-Tae Kim,Keisuke Ikeda,Tadasu Murakami.Metal flow in porthole die extrusion of aluminium[J].Journal of Materials Processing Technology 2002,(121):107-115.
[4]Jung Min Lee,Byung Min Kim,Chung Gil Kang.Effects of chamber shapes of porthole die on elastic deformation and ex- trusion process in condenser tube extrusion[J].Materials and Design 2005,(26)327-336.
[5]Jo H H,Lee S K,JungC S,etaL A non-steady state FE a- nalysis of Al tubes hot extrusion by a porthole die[J].Jour- nal of Materials Processing Technology,2006,(173):223 -231.
[6]于沪平，彭颖红，阮雪榆．平面分流模的二维FEM流动模拟[J]．金属成形工艺，1999，17(4)：36-38．
[7]刘汉武，丁桦，崔建忠．铝型材挤压分流组合模有限元分析和计算[J]．模具工业，1999，(4)：9-11．
[8]高锦张，刘伟，贾俐俐．多腔壁板铝型材分流组合模具挤压过程模拟[J]．锻压技术，2006，31(4)：93-96．
[9]吴向红，赵国群，孙胜，等．分流组合模挤压过程数值模拟及模具应力分析[J]．中国机械工程，2006，17(增刊)：106-109．
[10]刘建生，陈慧琴，郭晓霞．金属塑性加工有限元模拟技术与应用[M]．北京：冶金工业出版社，2003．
[11]Oh S I,Wu W T,Arimoto K.Recent developments in process simulation for bulk forming processes[J].Journal of Materials Processing Technology 2001,(111):2-9.
|
|
服务与反馈：
|
|
【文章下载】【加入收藏】
|
|
|
|
