CAJ | 학술논문

汽车侧围外板零件是车身重要的冲压件之一，成形过程极其复杂，拉伸过程中易产生起皱、开裂、凹坑等缺陷。文章针对侧围外板最常见的开裂缺陷问题，通过网格应变分析技术，研究B柱下区域变形特征和材料发生减薄、开裂的原因；基于有限元仿真模型，系统研究板料尺寸和拉延筋阻力对拉伸破裂的影响规律，并提出调整方案；由现场生产验证了分析结果的准确性和修模方案的有效性。
기차측위외판령건시차신중요적충압건지일，성형과정겁기복잡，랍신과정중역산생기추、개렬、요갱등결함。문장침대측위외판최상견적개렬결함문제，통과망격응변분석기술，연구B주하구역변형특정화재료발생감박、개렬적원인；기우유한원방진모형，계통연구판료척촌화랍연근조력대랍신파렬적영향규률，병제출조정방안；유현장생산험증료분석결과적준학성화수모방안적유효성。
Body side outer is one of the most important stamping parts of automobile body .Due to the forming complexity ,many defects often occur such as wrinkling ,cracking and hollow defects during drawing . For the frequently occurred cracking prob-lem , this paper investigates the deformation features and reasons of wall thinning and cracking at the bottom of B pillar area by the circle grid analysis technique .Based on FE model , the influence of blank size and drawbeads resistance on the drawing crack is systematically investigated ,and the improvement plans are presented .At last the accuracy of the analysis results and the effec-tiveness of the die modifying plan are verified by the factory production .