铝合金导线拉拔成型几何模具的优化  

Optimation of the Die Geometry in the Aluminum Alloy Wire Drawing Process

作　　者：孙小桥[1] 邓长胜[1] 

机构地区：[1]上海理工大学,上海200090

出　　处：《科学技术与工程》2011年第8期1709-1712,1721,共5页Science Technology and Engineering

摘　　要：铝合金导线拉拔成型塑性变形大,数学模型复杂,集几何非线性、边界非线性、材料非线性于一体。为提高拉拔质量,将基于刚塑性有限元法,对拉拔模具的入口半角α进行仿真优化。在保证拉拔过程中应力达到最小、拉拔道次和各截面缩减率一定的情况下,获得最优几何半角α。实例证明,成型后的铝合金导线性能良好。Drawing process of aluminum alloy wire has large plastic deformation,which mathematical model is complicated including geometric nonlinearity,boundary nonlinearity,material nonlinearity and so on.To enhance quality of drawing process,a method of simulation and optimation for half entry-angle α of drawing module based on rigid-plastic finite element method is described.It computes the best optimal α to minimize the drawing stress with a same ratio of section reducion and Lagrange multiplier.Experimental results demonstrate that drawing made aluminum alloy wires have good performance.

关 键 词：塑性变形 拉拔变形 有限元法 优化 

分 类 号：TG356.47[金属学及工艺—金属压力加工]