摘要
利用DEFORM有限元软件对铜铝复合接触线连续挤压包覆成形过程进行了数值模拟,研究了挤压过程中金属的流动规律及等效应力、等效应变和温度分布规律。结果表明,铝合金在流动过程中主要发生镦粗变形,该过程产生的变形热引起铝合金的温度升高。应变主要集中在堵头、靴座通道及模具型腔中,且在模口处易产生应力集中。复合变形区长度过短会导致铜铝界面结合变差,过长会阻碍铜铝包覆产品顺利出模。当变形区长度为3.5~5 mm时,既保证了包覆产品的结合质量又能使产品顺利出模。最后采用试验验证了模拟结果的准确性。
The continuous extrusion cladding forming process of Cu-Al composite contact wire was simulated by DEFORM finite element software and the metal flow rule,as well as the distribution rule of equivalent stress,equivalent strain and temperature in extrusion process were investigated.The results show that upsetting deformation maily occurs in the flow process of aluminum alloy and the deformation heat produced in the process causes temperature rise of aluminum alloy.The strain is mainly concentrated in the end cap,shoe passageway and mould cavity,and the stress concentration is easy to occur at die orifice.Too short length of composite deformation zone leads to poor bonding of Al-Cu interface,however,too long blocks the extrusion of product from the mould smoothly.When the length of composite deformation zone is 3.5-5 mm,the bonding quality of interface of cladding product can be guarateed and the product can be extruded smoothly.Finally,the reliability of simulation result was verified by experiment.
作者
彭孜
赵鸿金
董光明
宋振亚
张临财
任衍彪
PENG Zi;ZHAO Hong-jin;DONG Guang-ming;SONG Zhen-ya;ZHANG Lin-cai;REN Yan-biao(School of Chemistry and Materials Science,Zaozhuang University,Zaozhuang 277160,China;Shaoxing Tianlong Tin Materials Co.,Ltd.,Shaoxing 312030,China;School of Materials Science&Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2020年第3期58-64,共7页
Journal of Plasticity Engineering
基金
枣庄学院博士基金资助项目(2018BS062)。
关键词
铜铝复合线
连续挤压包覆
数值模拟
复合变形区长度
Cu-Al composite wire
continuous extrusion cladding
numerical simulation
length of composite deformation zone
