CAJ | 학술논문

橡皮囊成形是飞机钣金零件的一种重要成形工艺方法，回弹问题是橡皮囊成形的难点，对其影响因素进行显著性分析可有效控制回弹。基于橡皮囊成形有限元数值模拟，将正交试验设计方法与灰色关联度相结合用于分析橡皮囊成形回弹影响因素的显著性，以某实际长直 U 形件为例分析压力、最大充液速率、最大节点速度、保压时间、弯曲半径、板料厚度以及轧制方向等因素对回弹的影响程度，结果表明，模具圆角半径、压力、板料厚度、保压时间是橡皮囊成形回弹的主要影响因素，而最大充液速度、最大节点速度、轧制方向对回弹的影响较小。分析结果与工艺试验结果相吻合，从而验证了该方法的有效性。
상피낭성형시비궤판금령건적일충중요성형공예방법，회탄문제시상피낭성형적난점，대기영향인소진행현저성분석가유효공제회탄。기우상피낭성형유한원수치모의，장정교시험설계방법여회색관련도상결합용우분석상피낭성형회탄영향인소적현저성，이모실제장직 U 형건위례분석압력、최대충액속솔、최대절점속도、보압시간、만곡반경、판료후도이급알제방향등인소대회탄적영향정도，결과표명，모구원각반경、압력、판료후도、보압시간시상피낭성형회탄적주요영향인소，이최대충액속도、최대절점속도、알제방향대회탄적영향교소。분석결과여공예시험결과상문합，종이험증료해방법적유효성。
Rubber bladder forming is a kind of important forming process for aircraft sheet metal springback infecting factors might control the springback effectively.Herein,orthogonal experimental design combined with grey relation degree was used to analyse the significance for rubber forming springback influence factors based on the finite element numerical simulation,and a practical long straight U??shaped part was taken for example to analyse the influence degree on springback of these factors such as pressure,maximum volume flow rate,maximum node rate,holding time,bending radiG us,sheet thickness and the rolling direction.The analysis results show that bending radius of die,presG sure,sheet thickness,holding time are the main influence factors for rubber forming springback,and other factors have less effects.The analysis results are consistent with the experimental ones,so the efG fectiveness of this method can be validated.