【摘要】 1561铝合金是一种新型的舰船用高性能材料,目前对其冲压成形性能研究较少。基于1561铝合金材料的某近似鞍形船用外板开发,分析了产生起皱缺陷的原因,通过有限元计算对1561铝合金的成形过程进行仿真,并预测成形缺陷,使用变路径成形技术解决了大变形量成形件的起皱缺陷问题,改善了成形件质量。通过某船用外板的多点成形实验,验证了多道次成形解决1561铝合金成形件起皱问题的可行性,并通过三维扫描对成形件的精度进行了检测。结果表明,通过多道次成形可得到无起皱缺陷的1561铝合金零件,提高了成形质量。更多还原

【Abstract】 There has been a little research so far on the stamping performance of 1561 aluminum alloy,a new type of shipbuilding material with high-performance. The cause of wrinkle defects was analyzed based on the development of saddle-like shell plates of 1561 aluminum alloy. The forming process of the shell plate was simulated by the finite element method and the forming defect was predicted. The variable-path forming technology was used to reduce wrinkle defects of forming parts with large deformation,thus improving their quality.Through the multi-point forming test of the shell plate,it is proved feasible to eliminate wrinkle defects with the multi-pass forming technology. The accuracy of the forming parts was detected by 3 D scanning. The result shows that no wrinkle defect exists in the 1561 aluminum alloy parts and that the forming quality gets better when the parts are produced with the multi-pass forming technology.更多还原