基于近似模型的变压边力优化设计  

Optimization Design of Variable Blank-holder Force Based on Approximate Model

作　　者：龚志辉[1,2] 汪日超[1] 周顺峰[1] 杨继涛[1] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,湖南长沙410082 [2]重庆理工大学汽车零部件制造及检测技术教育部重点实验室,重庆400054

出　　处：《热加工工艺》2014年第7期92-96,共5页Hot Working Technology

基　　金：中国博士后基金项目(90353);华中科技大学材料成形与模具技术国家重点实验室开放基金项目(2011-P10);重庆理工大学汽车零部件制造及检测技术教育部重点实验室开放基金项目(2011KLMT06);湖南大学"青年教师成长计划"项目(2012-2007065)

摘　　要：对变压边力成形窗口进行了分析,提出了确定变压边力上下限的新方法。对凸模行程进行了分段,应用均匀拉丁方试验设计方法对每一段行程设置变压边力采样点,然后通过点绘出了光滑的变压边力拟合曲线。以成形后零件厚度变化为优化的目标函数,结合响应面近似建模技术、均匀拉丁方试验设计和遗传算法,获得了最优的变压边力曲线。与最优的恒定压边力成形结果比较,说明提出的方法是有效的。The forming window of variable blank-holder force （VBHF） was analyzed, and a new method to determine the upper and lower limits of VBHF was presented. The punch stroke was divided into some small segments, and next sampling points of VBHF on the each segments were set up by using uniform Latin square experimental design method, and then smooth VBHF fitting curve was drawn through points. Taking thickness change of formed parts as an optimized objective function, combining the response surface approximation modeling technology, uniform Latin square experimental design and genetic algorithm, the optimal VBHF curve was obtained. Compared with forming result of the optimal constant blank holder force, it is illustrated that the proposed method is effective.

关 键 词：变压边力 响应面法 遗传算法 冲压 

分 类 号：TG386.3[金属学及工艺—金属压力加工]