摘要
针对某汽车发罩内板,通过三维软件设计零件的工艺补充面和压料面,并借助数值模拟软件对成形工艺参数进行优化分析。首先采用单因素变量法寻找较好的模拟结果,然后采用正交试验方法对拉延成形的压边力、压机速度和摩擦因数3个因素进行试验设计,各因素的取值范围依据单因素实验确定。零件质量控制中主要考虑最大减薄率、最大增厚率和起皱趋势3个因素。其中最大减薄率和最大增厚率通过软件后处理直接查看,起皱趋势的评价采用起皱评判函数通过编程计算。多目标优化得出最优的参数组合为:压边力为1.4×106N,压机速度为20 mm·s-1和摩擦因数为0.15。利用优化所得参数进行试模,结果表明,零件的板料流入量和数值模拟结果吻合。
For an automobile hood inner panel, the addendum surface and binder surface were designed by a three-dimensional software, and parameters in stamping forming process were analyzed and optimized by numerical simulation software. Firstly, the reasonable simula- tion result was found by single factor variable method. Then, three factors of blank holder force, press speed and friction factor during the drawing process were designed by orthogonal experiment method, and the value range of each factor was determined by the single factor experiment. Three factors, including the maximum thinning ratio, maximum thickening ratio and wrinkling trend, were considered in the quality control of the part. The maximum thinning ratio and maximum thickening ratio were obtained through the post-processing of soft- ware; the evaluation of wrinkling trend was calculated by wrinkling function. The optimized parameters obtained by multi-objective optimization were blank holder force 1.4 × 10^6 N, press speed 20 mm .s^（-1）, and friction coefficient 0. 15 respectively. The attual experiment was conducted based on the above parameters, the results show that the sheet inflow of parts are in accordance with the simulation results.
出处
《锻压技术》
CAS
CSCD
北大核心
2016年第4期41-44,共4页
Forging & Stamping Technology
基金
重庆市教委2015年度科学技术研究项目(KJ1505301)
关键词
汽车发罩内板
多目标优化
冲压
数值模拟
正交试验
automobile hood inner panel
multi-objective optimization
stamping
numerical simulation
orthogonal test
