多目标质量的覆盖件成形工艺参数优化  

Auto Panel Forming Process Parameters Optimization of Multi-objective Quality

作　　者：赵茂俞[1,2] 薛克敏[1] 李萍[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009 [2]合肥学院机械工程系,合肥230022

出　　处：《机械工程学报》2009年第8期276-282,共7页Journal of Mechanical Engineering

基　　金：安徽省"十一五"科技攻关资助项目(06012150C)

摘　　要：覆盖件冲压是复杂的塑性变形过程,成形工艺参数较多,难以精确地建立工艺参数与成形质量之间的关系。选取优化合理的工艺参数匹配是保证无破裂、无起皱和板料厚度均匀分布等成形质量的关键。通过将压边力、拉深筋高度、凸筋圆角半径、凹筋圆角半径、摩擦因数作为自变量的条件下,以正交试验为设计方案,模拟轮包覆盖件成形,获得成形质量目标破裂、起皱、厚度最大变薄率的数据。通过层次分析法计算多质量目标的权重,利用灰色系统理论,分别计算成形质量对理想单目标值的关联系数和多目标函数的关联度,进一步计算获得各成形工艺参数的平均关联度,用优化的工艺参数进行有限元模拟验证,最终指导设计、试模,板料冲压结果表明成形的质量明显提高。Auto panel stamping is a complicated plastic deformation process with numerous forming process parameters, so it is difficult to accurately establish the relationship between the process parameters and the forming quality. Selecting optimized rational process parameter matching is the key to ensuring the forming quality, i.e. no rupture, no wrinkle and uniform sheet thickness, The forming of auto panel wheel warp is simulated by finite element sottware while the blank holder force, depth, die radius, punch radius of draw bead and frictional coefficient are independent variables, acquiring forming quality object （the data about the rupture, wrinkle and the thinning）by orthogonal experiment. Then the weight of multi-object is calculated by analytic hierarchy process, the grey relational generating between the forming quality object and the single ideal objective values, and the grey rational grade of multi-objective are all calculated by the grey theory system. Furthermore the average grey relational grades of the forming parameters are analyzed and the optimized process parameters are used to carry out finite element simulation and verification, and finally guide the design and die tryout. The result of blank stamping shows that the forming quality is obviously improved.

关 键 词：覆盖件 数值模拟 层次分析法 灰色系统理论 多目标优化 

分 类 号：TG386[金属学及工艺—金属压力加工]