复杂截面空心铝型材挤压过程数值模拟及模具结构改进  

Numerical simulation analysis of extrusion process for a complex cross-section hollow aluminum profile and the die improvement

作　　者：孙世仁 刘虹[1] 陈文琳[2] SUN Shi-ren;LIU Hong;CHEN Wen-lin(School of Mechanical Engineering, Hefei University of Technology, Hefei, Anhui 230009, China;School of Materials Science and Engineering, Hefei University of Technology, Hefei, Anhui 230009)

机构地区：[1]合肥工业大学机械工程学院,安徽合肥230009 [2]合肥工业大学材料科学与工程学院,安徽合肥230009

出　　处：《模具工业》2018年第4期19-23,共5页Die & Mould Industry

摘　　要：以某复杂截面空心铝型材为研究对象,利用数值模拟获得挤压过程中金属的流动变形机理,根据模拟结果,提出在焊合室中增设阻流块并调整其结构尺寸和焊合室结构尺寸的改进方案。经过多次改进模具结构后,型材出口处金属流速均匀,数值模拟与试模试验结果吻合,模拟结果为模具结构的改进设计提供了指导。Taking a complex cross-section hollow aluminum profile as the research object, the flow deformation mechanism of the metal during extrusion was obtained by the numerical simulation technology. It modified the die structure by adding the baffle plate to welding chamber and adjusting structure size of the baffle plate and welding chamber according to the simulation result. After improving the die structure several times, the flow velocity of the metal at the exit of the profile was uniform. And the numerical simulation result was in agreement with the test result. It could provide guidance for the improvement of the die structure.

关 键 词：空心铝型材 数值模拟 模具结构 阻流块 焊合室 

分 类 号：TG76[金属学及工艺—刀具与模具] TP391.9[自动化与计算机技术—计算机应用技术]