摘要
针对某一截面较大、形状较为复杂的铝合金型材,研究了该铝型材的挤压工艺、并进行了模具设计。基于ALE的有限元软件Hyper Works,建立该铝型材挤压成形有限元数值仿真模型,对挤压过程进行数值仿真研究,从而获得型材挤压过程金属流动规律。根据仿真结果,分析了焊合室各层高度、尺寸形状和模具结构参数对型材挤压速度分布、材料粒子运动轨迹以及应力应变分布等金属流动行为的影响规律,并对模具结构参数进行优化设计。计算结果表明:优化设计后的模具可以使模具出口处金属流动的速度相对比较均匀,减小产品扭曲变形程度,较好地满足该型材截面形状和尺寸精度方面的要求。
The extrusion process and mold design of aluminum alloy profile with large section and complex shape were studied,based on the ALE FEM software HyperWorks.The numerical simulation model of aluminum profile extrusion process was established,and an analysis was made on it to obtain the metal flow law of aluminum profile extrusion process.According to the simulation results,the paper analyzed the metal flow behavior of velocity distribution,particle trajectory,stress and strain distribution,which influenced by welding chamber of each layer height,shape and size and structure parameters of mold,and also optimized the structure parameters of the mold.Calculation results show that,the optimized mold can make the metal flow at the exit relatively uniform,and reduce the distortion degree of the product,which can meet the requirements of section shape and dimension precision of aluminum alloy.
出处
《机床与液压》
北大核心
2016年第12期88-95,共8页
Machine Tool & Hydraulics
基金
supported by Independent Innovation Fund of Wuhan University of Technology (No. 2016-ND-C1-14)
