板料拉伸成形多点压边力优化

介绍了板料拉伸过程中压边力控制发展史及发展预测,提出了一种压边力优化方法———多点压边力方法,并通过ANSYS软件模拟出矩形盒件拉伸成形过程多点压边力优化曲线。

应用神经网络优化压边力

以汽车行李箱盖冲压成形过程为例,提出一种利用人工神经网络技术对压边力控制曲线进行优化的方法,将压边力优化理论与数值仿真技术相结合,建立了压边力优化RBF神经网络模型。仿真结果证明,采用优化后的变压边力控制曲线能有效改善板料的成形性能和成形质量。

基于Autoform的机罩内板稳健性工艺优化与回弹补偿

为了改善车身覆盖件稳健性差和回弹不良等问题,以某车型机罩内板为研究对象,结合产品特点采用CAD/CAE协同手段设计了精细化3D模面,并通过Autoform成形及回弹仿真对冲压工艺方案进行评价。首先,以回弹量为目标函数,以减薄率为约束条件,以压边力为可控设计变量进行了均分单因素试验,并对不可控噪音因素进行了稳健性评价。最后,对稳健性工艺优化结果采用节点位移和几何补偿结合的方法进行了回弹补偿,通过数字孪生对比了实物扫描和虚拟仿真的差异。结果表明:稳健性工艺优化及回弹补偿相结合的方式具备良好的可靠性和准确性,首轮样件精度达到95.2%,与仿真结果的一致性可达到94.9%,有效地减少了试模次数和时间。

Optimizing and slope determination of final wall for Maiduk Mine with consideration of destabilizer factors

In this research, determination of final slope for Maiduk copper mine of Kerman is investigated according to destabilizing factors of the mine. The development of the Maiduk Mine caused the extension of the mine area and also withdrawal of its wall. So, optimizing possibility of mine slope is essential. Finally,the magnitude of optimized slopes for different walls of the mine in association with executive commands with better factors of safety is provided. The results show that the most important destabilizer factors are the presence of water and pore pressure in the faults and the main joints. With the omission of pore pressure, mine wall for the designed depth is quite stable. This requires a drainage pattern in the lifetime of the mine. In an optimistic point of view, the minimum factor of safety of the wall will be 2.81 even without drainage. This conclusion allows optimizing the slope to its maximum magnitude of 51 degree. With the pessimistic engineering judgment and with the higher SF, the magnitude of the slope is optimized to 47 degree.