B4CP/6063Al板材等应变速率挤压模具优化  

Optimization of constant-strain-rate extrusion die for B4CP/6063Al sheet

作　　者：成小乐[1,2] 袁建才 尹君 屈银虎[1] 周思君[1] 符寒光 CHENG Xiao-le;YUAN Jian-cai;YIN Jun;QU Yin-hu;ZHOU Si-jun;FU Han-guang(School of Mechanical&Electronic Engineering,Xi'an Polytechnic University,Xi'an 710048,China;State Key Laboratory of Metal Extrusion and Forging Equipment Technology,Xi'an 710032,China)

机构地区：[1]西安工程大学机电工程学院,陕西西安710048 [2]金属挤压与锻造装备技术国家重点实验室,陕西西安710032

出　　处：《塑性工程学报》2020年第2期37-44,共8页Journal of Plasticity Engineering

基　　金：国家重点基础研究发展计划资助项目(2012CB724303);陕西省重点研发计划资助项目(2018GY-130);西安市科技计划资助项目(2017074CG/RC037(XAGC007));2018年度西安工程大学研究生创新基金资助项目(CHX201855)。

摘　　要：针对B4CP/6063Al基复合材料伸长率低、塑性变形困难的特点,设计出适用于B4CP/6063Al板材的等应变速率挤压模具。基于热压缩模拟试验结果建立材料的本构方程。利用Deform-3D软件对采用所设计的等应变速率挤压模具和传统挤压模具的挤压过程分别进行有限元模拟,对比研究了采用两种模具时挤压过程中的坯料应力场、温度场以及坯料流动性。结果表明:采用等应变速率挤压模具较传统挤压模具所需最大拉应力减小了28. 5%,坯料在模具出口处的温度升高了0. 6%,模具出口的金属流速均匀性提高了44%。模拟结果表明,等应变速率挤压模具较传统挤压模具,更利于B4CP/6063Al板材成形。In view of the low elongation and poor plastic deformation of B4CP/6063 Al matrix composite material,a constant-strain-rate extrusion die suitable for B4CP/6063 Al sheet was designed. The constitutive equation of the material was established based on the results of hot compression simulation test. The finite element simulation of extrusion process with the designed constant-strain-rate extrusion die and the traditional extrusion die was carried out by Deform-3 D,respectively. The stress field,temperature field and flowability of billet during extrusion process by the two kinds of dies were compared. The results show that the maximum tensile stress required by constant-strainrate extrusion die is reduced by 28. 5% compared with the traditional extrusion die,the temperature of the billet at the exit of the die is improved by 0. 6%,and the metal flow uniformity at the outlet of die is improved by 44%. The simulation results show that the constantstrain-rate extrusion die is more beneficial to B4CP/6063 Al sheet forming than the conventional extrusion die.

关 键 词：等应变速率 挤压模具 有限元模拟 B4CP/6063Al板材 

分 类 号：TQ330.41[化学工程—橡胶工业]