锻压技术

汽车后地板前横梁冲压件的成形质量控制

英文标题：Quality control of front beam for rear floor part used in car

作者：柯桂颜路平江开勇辛秀敏陈卿雁

关键词：板料形状冲压成形拉延筋 Dynaform

分类号：TG386

出版年,卷(期):页码：2016,41(8):39-42

摘要：

采用合理的板料形状以及合理地设置拉延筋，能够改善板料在成形中的流动性，从而减少起皱、拉裂等质量缺陷。以某汽车后地板前横梁为例，利用Dynaform坯料尺寸估算模块，对凸模进行逆向展开获得轮廓线，以偏置后的轮廓线的外切矩形确定板料初始形状，并进行成形仿真；在分析成形极限和金属流动方向的基础上，为消除零件的开裂缺陷，对初始板料左、右上角进行切除，获得修正的板料形状。仿真分析结果表明，修正后的板料增加了左、右上角材料的流动性，降低拉深变形的阻力。为减小零件的起皱缺陷，在模具中间部分设置拉延筋，拉延筋的设置降低了中间部分材料的流动性、增加了拉深变形的阻力，使变形趋于平衡，从而提高了零件的成形质量。

In sheet metal stamping forming process, an appropriate shape of blank and reasonably setting of drawbeads reasonably can improve metal flowing properties and reduce wrinkling and cracking, thus avoid forming defects. For a front beam of rear floor part in the car, its forming process was analyzed by the commercial software Dynaform. The punch surface was unfolded and the contour line was offset by utilizing the BSE (Billet Size Estimation) module of Dynaform. A forming process of the contour line-offset blank was simulated. On the basis of forming limit diagram and edge movement of the sheet metal, the upper left and right corners of the blank were cut off to avoid cracking defects, and the optimized blank was obtained. The obtained simulation results show that flow of the metal at the upper corners is significantly improved and the drawing resistance is reduced. Moreover, in order to solve the wrinkling problem, drawbeads are set in the middle of contact surface between die and blank holder. The experiment results show drawbeads impair the metal flow in the middle zone of the blank and improve drawing resistance. Therefore, its forming quality is improved.

基金项目：

国家自然科学基金资助项目（51305144）；福建省自然科学基金资助项目（2015J01203）；福建省科技计划重点项目（2008H0085）；华侨大学研究生科研创新能力培育计划资助项目

柯桂颜（1992-），男，硕士研究生路平（1980-），女，博士，副教授

参考文献：

［1］张双杰，张招，闫华军，等. 基于高强度拼焊板的B柱内板工艺参数研究[J]. 锻压技术，2014，39（3）：29-33.Zhang S J，Zhang Z，Yan H J，et al. Research of process parameters on B-pillar inner based on HSSTWB [J]. Forging & Stamping Technology，2014，39（3）：29-33.
［2］闫盖，郑燕萍，王列亮. 汽车覆盖件冲压材料利用率提升的研究与应用[J]. 锻压技术，2014，39（2）：84-87.Yan G, Zheng Y P, Wang L L. Research and application of material utilization ratio improvement for automobile panel [J]. Forging ＆ Stamping Technology，2014，39(2): 84-87.
［3］Kim S H, Huh H. Design sensitivity analysis of sheet metal forming processes with a direct differentiation method[J]. Journal Materials Processing Technology, 2002,130-131: 504-510.
［4］林淑霞，张国强，王锐，等. 大型覆盖件成形中板料形状的影响[J]. 模具技术，2003，（6）:41-42.Lin S X, Cheung G Q, Wang R, et al. Stamping of sheet metal in the shape of a large impact[J]. Die & Mould Technology, 2003,（6）:41-42.
［5］吴建军，郭军. 钣金零件毛坯展开计算方法研究进展[J]. 航空制造技术，2011，(19):26-31.Wu J J, Guo J. Research progress on the development of sheet metal parts in the calculation method [J]. Aviation Manufacturing Technology, 2011, (19):26-31.
［6］王秀凤，郎利辉. 板料成形CAD设计及应用[M]. 北京：北京航空航天大学出版社，2008.Wang X F, Lang L H. Design and Application of Sheet Metal Forming CAD [M]. Beijing：Beihang University Press, 2008.
［7］刘桂花，覃才友，严辉容，等. 减速机端盖的冲压工艺及模具设计[J]. 锻压技术，2014，39（7）：55-57.Liu G H，Qin C Y，Yan H R，et al. Stamping process and die design of reducer cover [J]. Forging & Stamping Technology，2014，39（7）：55-57.
［8］龚红英. 板料成形性能及CAE分析[M]. 北京：机械工业出版社，2014.Gong H Y. Sheet Metal Forming Performance and CAE Analysis [M]. Beijing: China Machine Press, 2014.
［9］Lee C H, Huh H. Blank design and strain estimates for sheet metal forming process by a finite element inverse approach with initial guess of linear deformation [J]. Journal of Materials Processing Technology, 1998, 82: 145-155.
［10］史刚.拉延筋技术[J].模具技术，2004,(3):31-34.Shi G. Drawbeads technology [J]. Die & Mould Technology, 2004,(3): 31-34.

服务与反馈：

【文章下载】【加入收藏】