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针对高强度钢无凸缘方盒形件在拉深成形中产生的粘模现象,以工件的相对磨损量和对应模具位置的相对粘模量作为评判指标,建立了一种基于有限元分析的粘模位置预测模型。根据该模型对凹模的粘模位置进行了分析。结果表明,模具表面的粘模最易在凹模直边底部产生,而非通常认为的凹模圆角与直壁的连接处。预测的粘模位置与高强度钢无凸缘方盒形件拉深实验结果基本一致,验证了预测方法的可行性和模型的可靠性。
Aiming at the phenomenon of sticking in the forming of high strength steel flangeless box, the relative wear amount of workpiece and the relative adhesive modulus of corresponding die position are taken as the evaluation indexes, and a finite element analysis based Sticky mold position prediction model. Based on the model, the die sticking position was analyzed. The results show that the mold surface of the sticky mold is most likely to die at the bottom of the straight edge, rather than the generally considered die fillet and the straight wall of the junction. The predicted sticking position is basically the same as that of high-strength steel flange-free box-shaped parts, which verifies the feasibility of the prediction method and the reliability of the model.