发动机隔热罩冲压成形的工艺参数优化  

Optimization of process parameters in engine heat shield stamping

作　　者：覃柏英[1] 汤淑芳[2] 林贤坤[2] 汪铁丰 

机构地区：[1]广西科技大学理学院,广西柳州545006 [2]广西科技大学汽车与交通学院,广西柳州545006

出　　处：《锻压技术》2015年第9期27-32,共6页Forging & Stamping Technology

基　　金：广西自然科学基金资助项目(2012GXNSFAA053208);广西区教育厅立项项目(LX2014197)

摘　　要：借助Dynaform数值模拟软件建立某型号发动机隔热罩的冲压成形仿真模型。在此基础上,选取冲压工艺参数为优化变量,定义最大减薄率和起皱率为评价指标,由此构建加权目标函数,采用均匀设计安排数值模拟试验和回归分析法分析试验数据,建立了工艺参数与加权目标函数的二次多项式回归模型,利用实数编码遗传算法对隔热罩冲压成形的最优工艺参数进行求解。数值模拟优化结果表明,针对隔热罩仿真模型,优化后的最大减薄率和起皱率分别为24.748%和6.791%,控制在较好范围内。The simulation model of stamping of a certain type of engine heat shield was established by numerical simulation software Dynaform. Base on the simulation model,the weighting objective function was constructed by setting process parameters as the optimization variables,the maximum thinning rate and wrinkling rate as evaluation values. A quadratic polynomial regression model with process parameters and weighted objective function was established by uniform design to simulate experiments numerically and regression analysis to experimental data. The maximum process parameters were solved by the real coded genetic algorithm to form heat shield. The numerical simulation optimization results show that the maximum of thinning rate and wrinkle rate are 24. 748% and 6. 791% respectively,which are within a good range by optimizing process parameters for the engine heat shield.

关 键 词：冲压成形 Dynaform软件 减薄率 起皱率 加权函数 

分 类 号：TG306[金属学及工艺—金属压力加工] TK406[动力工程及工程热物理—动力机械及工程]