基于数值模拟的某飞机旅客观察窗窗框模锻成型工艺研究

Study on Forging Process of An Aircraft Window Frame Based on Numerical Simulation

采数值模拟仿真技术研究了某飞机旅客观察窗窗框模锻成型温度场、应变场、速度场等物理场量的分布规律及变化。研究结果表明,坯料在变形的初始阶段金属流动受到阻力较小,坯料与模具接触部分温度下降速度较快,此时坯料变形及应力值也较小;随着模具下压,金属填充受到的阻力越来越大,坯料腹板两侧的温降速度开始下降,与中间筋条部分基本保持一致,坯料整体的等效应变及应力逐渐增大。锻件成型最大载荷为8560t。

Numerical simulation is used to study the distribution rules and changes of physical fields such as temperature field,strain field and velocity field of an aircraft window frame forging.The results show that the metal flow in the initial stage of deformation is less resistant,and the temperature of the contact between the blank and the mold drop faster.At this time,the deformation and stress value of the blank are also small.As the mold press,metal filling resistance is more and more big,temperature drop rate began to fall on both side of the billet web,are almost consistent with the middle rib part,equivalent strain and stress of the blank overall increased gradually.Maximum load of forging forming is8560t.