基于多目标优化的镁合金机械外壳挤压工艺研究  

Study on Extrusion Process of Magnesium Alloy Mechanical Shells Based on Multi-objective Optimization

作　　者：李秋琴[1] LI Qiuqin(Guangxi Vocational&Technical Institute of Industry,Nanning 530001,China)

机构地区：[1]广西工业职业技术学院,广西南宁530001

出　　处：《热加工工艺》2020年第15期76-79,共4页Hot Working Technology

基　　金：广西教育厅科研项目(200911MS337)。

摘　　要：以挤压温度、挤压速度、挤压比、模具温度为全局变量,以坯料长度为局部变量,以AZ31镁合金机械外壳挤压件宽度、厚度以及挤压件填充率为目标函数,利用MBC工具箱可以实现AZ31镁合金机械外壳挤压工艺多目标优化。与生产线现用工艺参数相比,采用多目标优化数学模型优化出的最佳工艺参数挤压时,挤压件的抗拉强度、屈服强度分别增大14(251→265)MPa、19(201→220)MPa,断后伸长率下降幅度极小。Taking extrusion temperature,extrusion speed,extrusion ratio and die temperature as global variable,blank length as local variable,the width,thickness and filling ratio of AZ31 magnesium alloy mechanical shell as objective function,the multi-objective optimization of extrusion process of AZ31 magnesium alloy mechanical shells can be realized by using MBC toolbox.Compared with the current process parameters of the production line,the tensile strength and yield strength of the extruded parts increase by 14(251→265)MPa,19(201→220)MPa,respectively,and the decrease of elongation after break is very small,when using the optimum process parameters optimized by the multi-objective optimization mathematical model.

关 键 词：多目标优化 挤压 工艺优化 镁合金 机械外壳 

分 类 号：TG359[金属学及工艺—金属压力加工]