摘要
针对异形薄壁不锈钢零件冲压成形过程中存在的成形不足与严重起皱等问题,借助Dynaform软件建立异形薄壁不锈钢隔热罩的有限元模型,分别研究了压边力、冲压速度、摩擦因数和模具间隙4个关键工艺参数对零件冲压成形质量的影响,并根据板料的厚度变化曲线确定了以上关键工艺参数的合理范围。通过增设拉延筋,利用正交试验法对关键工艺参数进行了优化。结果表明,相比优化前的冲压成形工艺,最大减薄率增大了1.22%,最大增厚率减小了2.42%,最大回弹量减小了4.07%,成形不足与严重起皱等问题得到有效抑制。通过试验验证,证实了优化后冲压成形工艺方案的可行性。
Aiming at the problem of insufficient forming and serious wrinkle in the stamping forming process of special-shaped thin-walled stainless steel parts,the finite element model of special-shaped thin-walled stainless steel heat shield was established using Dynaform software.The influence of four main process parameters,including blank holder force,stamping speed,friction factor and mold clearance on parts quality was studied,respectively,and the reasonable range of the above main process parameters was determined according to the thickness variation curves of sheet metal.By adding drawbeads,and the main process parameters were optimized by orthogonal test method.The results show that compared with the stamping process before optimization,the maximum thinning rate increases by 1.22%,the maximum thickening rate decreases by 2.42%,and the maximum springback decreases by 4.07%.The problems of insufficient forming and serious wrinkle are effectively restrained.Through the tests verification,the feasibility of the optimized stamping forming process scheme is verified.
作者
王树飞
陈岁繁
何雄华
黄江华
李其朋
WANG Shu-fei;CHEN Sui-fan;HE Xiong-hua;HUANG Jiang-hua;LI Qi-peng(School of Mechanical and Energy Engineering,Zhejiang University of Science&Technology,Hangzhou 310000,China;Yongkang Didi Technology Co.,Ltd.,Jinhua 321300,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2022年第8期19-27,共9页
Journal of Plasticity Engineering
基金
国家重点研发计划(SQ2020YFF0423771)
浙江省科技计划项目(2020C01053)。
关键词
异形件
冲压成形
数值模拟
正交试验
拉延筋
special-shaped part
stamping forming
numerical simulation
orthogonal test
drawbead
