CAJ | 학술논문

为了提高板料成形件质量，提出了一种等效拉延筋阻力模型。该拉延筋阻力模型在平面应变假设的前提下，考虑中性层偏移、鲍辛格效应等多种因素影响，通过与经典的Nine试验数据比较，证明了该模型的准确性。以翼子板为成形对象，结合改进的等效拉延筋阻力模型，采用非线性优化算法对拉延筋结构进行优化设计。利用优化获得的等效拉延筋阻力反求拉延筋几何参数，建立成形中的实体拉延筋仿真模型，获得了质量较好的成形件。研究结果表明该等效拉延筋阻力模型能够较好地适用于板料成形中。
위료제고판료성형건질량，제출료일충등효랍연근조력모형。해랍연근조력모형재평면응변가설적전제하，고필중성층편이、포신격효응등다충인소영향，통과여경전적Nine시험수거비교，증명료해모형적준학성。이익자판위성형대상，결합개진적등효랍연근조력모형，채용비선성우화산법대랍연근결구진행우화설계。이용우화획득적등효랍연근조력반구랍연근궤하삼수，건립성형중적실체랍연근방진모형，획득료질량교호적성형건。연구결과표명해등효랍연근조력모형능구교호지괄용우판료성형중。
In order to improve the quality of sheet metal forming ,an equivalent draw bead restrai-ning force model was proposed .Plane strain assumption was employed in the model and many factors were considered like incline of neutral layer and Bauschinger effect .The computation re-sults were compared with classical Nine test data ,which verified the effectiveness of the method . Fender was tested by this equivalent drawbead restraining force model and the drawbead structure was optimized by nonlinear algorithm .The drawbead geometric parameters were inversed by the equivalent drawbead restraining force model ,then the physical drawbead simulation model was es-tablished ,and products with better quality were obtained .The research results prove the equiva-lent draw bead restraining force model can be used in sheet metal forming effectively .