摘要
针对某车型发罩外板拉伸过程中出现起皱、开裂及表面凹凸问题,通过对模具结构及成形过程中板料的流向进行分析,提出了通过优化筋条配置及压料面间隙的改进方案,使板料流入量符合制件成形需求。同时借助网格试验,获得整改后材料的应变路径及成形安全裕度。实践表明,实施该措施可有效提升拉伸件的品质及模具运行效率,制件FTQ由74.6%提升至93.5%,生产效率由68%提升至85%,可为汽车覆盖件冲压模具的设计提供参考。
For defects such as wrinkling, cracking and uneven surface problems in the drawingprocess of a certain hood, in this paper, the die structure and the inflows of sheet metal duringthe forming process are analyzed and the methods to optimize drawbead configuration and dieface gap are proposed, making sheet metal inflows meet the requirements of workpiece forming.Simultaneously, by gird experiment, the strain path and forming safety margin of material areobtained after rectification. The engineering practice shows that the implementation of thesemeasures can effectively improve the quality of drawing parts and the operation efficiency ofdies. FTQ of parts increased from 74.6% to 93.5% and the production efficiency improved from68% to 85%. This paper can provide a reference for the design of stamping die of automobile panel.
出处
《模具制造》
2018年第5期19-24,共6页
Die & Mould Manufacture
关键词
汽车覆盖件
起皱
开裂
工程实践
automobile panel wrinkling
cracking
engineering practice
