亚毫米孔径微通道铝合金管挤压成形的数值模拟  

Numerical simulation study upon extrusion forming of microchannel tube

作　　者：唐鼎[1] 邹天下[1] 李大永[1] 彭颖红[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《塑性工程学报》2011年第3期25-29,共5页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(50634010)

摘　　要：基于DEFORM-3D有限元分析平台,采用网格分步重划分的方法,实现了对微通道管成形非稳态过程的三维数值模拟,获得了成形过程模具中的金属应力和流速分布,以及模具受力情况。利用数值模拟结果,结合压力-时间判据,对焊合质量进行评估,并利用热模拟试验机模拟了挤压成形中相应温度和接触压力下的焊合过程。该文研究可对实际生产微通道管时工艺参数优化和挤压模具设计等问题提供参考。MPE（multiport extrusion）tube with submillimeter-diameter channels is a kind of newly developed heat transfer tube based on the theory of heat transfer enhancement with meso-scale structures.With characteristics of tiny diameter,thin wall and dimensional accuracy,the tube brings challenges to the extrusion process.Based on the FE code DEFORM-3D and using method of local mesh refining,FE simulation of the extrusion process of the micro-channel tube was carried out.Processing parameters such as pressure of the welding chamber and velocity of the metal flow were examined.Suggestion of relationship between the height of the welding chamber and the height of the mandrel and stress distribution on the mandrel were given.

关 键 词：微通道管 铝合金挤压 分流模 

分 类 号：TG379[金属学及工艺—金属压力加工]