某汽车前纵梁内板拉延成形数值模拟及工艺参数优化
Numerical Simulation and Parameter Optimizing of the Front-carling inner plate
吴善冬，周杰，李崇，陈涛，杨明
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作者单位：吴善冬：重庆大学材料科学与工程学院、中国人民解放军乐山陆军预备役步兵旅；
周杰、李崇、陈涛：重庆大学材料科学与工程学院
杨明：四川省宜宾五粮液普什模具有限公司
中文关键字：前纵梁内板；冲压过程；数值模拟；工艺参数
英文关键字：front-carling inner plate; stamping process; numerical simulation; process parameters
中文摘要： 针对板料冲压过程变形复杂，易出现起皱、拉裂等缺陷，以某型汽车前纵梁内板为研究对象，采用有限元软件DYNAFORM对零件拉延工艺进行了数值模拟仿真。针对零件成形特点，设计了合理的拉延形面，并分析拉延筋、压边力及入模圆角的变化对该零件成形效果的影响。通过零件成形极限图优化拉延筋、压边力及入模圆角，最终获得适合该零件成形工艺参数。试模结果表明采用优化后的参数可以有效地改善材料的流动状况，消除了起皱、拉裂等缺陷，提高了成形质量。
英文摘要：Aiming at the complicated deformation, the wrinkling and cracking problems of sheet matal during stamping process, the drawing process of the front-carling inner plate is simulated by the finite element software, Dynaform. For the forming characteristics, the drawing surface is designed. The influence of different technical parameters of the drawing process， such as draw bead，the blank-holder force, the die round corner are discussed. The draw bead，blank-holder force and the die round corner are optimized by FLD. Finally the suitable appropriate parameters are obtained. The simulation results show that the wrinkling and cracking problems are eliminated，the material flow and the quality of the part can be improved effectively with the optimized parameters.