锻压技术

外防护板成形工艺

英文标题：Forming process of outer protection plate

单位：1. 天津航天长征火箭制造有限公司 2. 北京航空航天大学机械工程及自动化学院

关键词：外防护板冲压不规则流料起皱回弹

分类号：

出版年,卷(期):页码：2022,47(3):79-82

摘要：

以外防护板为研究对象，针对冲压成形过程中产生的不规则流料、严重起皱和弧度回弹问题，应用Dynaform软件进行冲压成形过程的有限元分析。通过对比坯料直接冲压、滚弯后冲压和折弯后冲压的数据，得出了优化的成形工序和模具回弹量，完成了外防护板冲压工艺设计。结合有限元分析结果进行试验验证，得出以下结论：零件预折弯后再进行冲压成形，可以减少成形中不规则流料和严重起皱现象的发生；成形模具弧度考虑15%的回弹率可以减少零件的弧度回弹，提高成形精度。最后，通过生产经验及试验验证，发现在成形过程中增加退火工艺可以提高零件的成形精度，减少零件的起皱现象。

For the outer protection plate, in view of the problems of irregular flow, serious wrinkling and arc springback generated in the stamping process, the finite element analysis of the stamping process was conducted by Dynaform software, and through comparing the data of direct stamping, stamping after roll bending and stamping after bending for billet, the optimized forming process and die springback amount were obtained to complete the stamping process design of the outer protection plate. Then, combined the analysis results of finite element, the experimental verification was carried out. The results show that stamping after bending for parts can reduce the occurrence of irregular flow and serious wrinkling phenomenon in the forming process. The arc springback of part is reduced and the forming accuracy is improved if 15% springback rate is considered for the arc of forming die. In addition, through production experience and experimental verification, it is found that adding annealing in the forming process can improve the forming accuracy and reduce the wrinkling phenomenon of parts.

基金项目：

王妍琴（1987-），女，硕士，工程师 E-mail：1124337718@qq.com

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