2219铝合金异形截面环件轧制的数值模拟  

Numerical Simulation of 2219 Aluminum Alloy Ring Rolling with Abnormity Section

作　　者：李爽 吴运新[1,2,3] 龚海[1,2,3] 刘磊 LI Shuang;WU Yunxin;GONG Hai;LIU Lei(School of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China;State Key Laboratory of High Performance Complex Manufacturing,Central South University,Changsha 410083,China;Institute of Light Alloy,Central South University,Changsha 410083,China)

机构地区：[1]中南大学机电工程学院,湖南长沙410083 [2]中南大学高性能复杂制造国家重点实验室,湖南长沙410083 [3]中南大学轻合金研究院,湖南长沙410083

出　　处：《热加工工艺》2021年第19期78-82,共5页Hot Working Technology

基　　金：国家自然科学基金航天联合基金项目(U1637601)。

摘　　要：对2219铝合金试样进行了热压缩实验,获得了合金在不同应变速率(0.01~10 s^(-1))以及温度(350~500℃)下的真应力。根据环件的咬入条件以及塑性锻透条件确定了芯辊进给范围,再根据轧辊之间的几何关系确定了轧制过程中导向辊的位置以及锥辊的位置。将2219铝合金的真应力-真应变结果输入ABAQUS/Explicit有限元软件的材料属性模块中,通过已建立的轧辊控制数学模型编写了VUAMP子程序,各个轧辊通过VUAMP子程序进行了控制,建立了异形截面环件轧制过程的热力耦合有限元模型。分析了异形截面环件轧制过程中环件长大以及等效塑性应变和温度分布的变化规律。The thermal compression experiment of 2219 aluminum alloy sample was carried out, and the true stress of the alloy at different strain rates(0.01-10 s^(-1)) and temperatures(350-500℃) were obtained. According to the biting condition of the ring and the plastic forging condition, the feed range of the core roll was determined, and then the position of the guide roller and the position of the conical roller in the rolling process were determined according to the geometric relation between the rollers. The true stress-true strain results of 2219 aluminum alloy were input into the material attribute module of ABAQUS/Explicit finite element software, and the VUAMP subprogram was compiled through the established mathematical model of roll control. Each roller was controlled by VUAMP subprogram, and the thermodynamic coupling finite element model of the rolling process of abnormity section ring was established. The variation of ring growth, equivalent plastic strain and temperature distribution in the rolling process of the abnormity section ring was analyzed.

关 键 词：2219铝合金 异形截面环件轧制 ABAQUS/Explicit软件 VUMPA子程序 

分 类 号：TG339[金属学及工艺—金属压力加工]