第42卷第5期 Vol. 42No. 5
钣压技术
FORGING & STAMPING TECHNOLOGY
后背门内板成形工艺缺陷分析与优化
关来德
（柳州职业技术学院机电工程系，广西柳州545006）
2017年5月 May 2017
摘要：以汽车后背门内板为研究对象，根据零件形状起伏变化较大且拉深较深的特点，拟定了4道工序成形工艺方案。利用 AutoForm软件对成形工艺方案进行数值模拟，分析拉深过程中零件右上角部位出现的拉裂现象、尾灯附近处存在起皱风险、法兰面有较大回弹量、局部变薄等缺陷，并提出通过加大开裂处R角半径、优化压料面及修改拉延筋减少起皱、在回弹量大的法兰面增加加强筋等措施。结果表明，优化后的后背门内板工艺方案在成形过程中无起皱、开裂缺陷，与数值模拟结果一致，验证了数值模拟分析的正确性。
关键词：后背门内板：拉深成形；数值模拟：成形缺陷；拉延筋 DOI: 10. 13330/j. issn. 1000-3940. 2017. 05. 004
中图分类号：TG386
文献标识码：A
文章编号：1000-3940（2017）05-0019-06
Analysisandoptimizationondefectsfromformingprocessof
back doorinnerpanel
Guan Laide
( Mechanical and Eleetronic Engineering Department, Liuzhou Vocational & Technical College, Liuzhou 545006, China)
Abstract: For the inner plate of the back door, a four-step process was developed based on the characteristics of the large change in parts shapes and the deep drawing. Then, the forming process was simulated by the AutoForm software, and the defects such as crack at the upper right corner of the site, wrinkling near the tail risk, large springhack of flange surface and local thinning in the drawing process of parts were analyzed. Furthemore, solutions such as increasing the R eomer radlius, optimizing and modifying drawbeads to reduce wrinkle and increasing drawbeads on the big flange surface were proposed. The results show that there is no wrinkling and cracking in the forming process of the inner plate of the back door, which is consistent with the numerical simulation results. The correctness of analysis results is proved by the corresponding experiments.
Key words : back door inner plate; drawing process; FEA simulation; forming defects; drawbeads
后背门内板是汽车重要的覆盖件零件之一，主要起到支撑和加强后背门外板的作用，是汽车后背门安装调整的关键零件。后背门内板具有尺寸大、相对厚度小、零件形状起伏变化较大的特点，成形过程中变形规律不易被掌控，易在生产过程中出现
收稿日期：20170110；修订日期：20170320
基金项目：2015年度广西高校科学技术研究项目（KY2015YB4D1）
作者简介：关来德（1977-），男，硕士，讲师 E-mail:529288595@ q9-com
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Jia C Y, Yang Y, Chen F, et al. NURBS curve discrete algorithm based on equal arc length principle [J]. Computer Engineering and Applications, 2014, 50 (3) : 165 167.
万方数据
开裂、起皱等成形缺陷，影响与外板的压合精度。针对后背门内板零件出现的成形缺陷，利用工程经验和数值模拟分析方法对开裂、起皱、回弹等成形缺陷进行分析，提出一个有效解决方案，以减少模具反复修正周期，提高产品开发质量。
1 1.1[9]
后背门内板要求及工艺特点零件成形工艺性分析
图1为某汽车后背门内板数模，与外板包边后甘蛇，齐从谦，陈亚洲。基于毒传算法的曲线曲面光顺[]，同济大学学报：自然科学版，2002，30（3）：322325
eaens pue sana o Suoog Z a 0 0 “ ue based on genetie algorithm [J]- Joumal of Tongji University: Nat-ural Seience, 2002, 30 (3) : 322 325.