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基于汽车转向节模锻成形工艺,给出了锻模表面三种阻力墙结构设计方案,以研究阻力墙对复杂锻件成形的影响。同时,针对不同阻力墙结构的转向节热锻模具建立有限元模型并对模拟结果进行分析。结果表明:阻力墙能够通过改变金属流动影响转向节锻件的模锻成形载荷、金属充填效果和锻造缺陷。阻力墙的存在能够有效地促进转向节叉成形,改善无阻力墙时充填不满的现象。然而,不合理的阻力墙设计则会导致成形载荷上升、折叠缺陷产生以及金属流动不协调。通过调整阻力墙高度改变其阻碍作用,得到了合理的设计方案,为生产提供了参考依据。
Based on the die forging process of automobile steering knuckle, the design scheme of three kinds of resistance walls on forging die surface is given to study the influence of resistance wall on the forming of complex forging. At the same time, a finite element model is established for hot forging dies with different resistance wall structures and the simulation results are analyzed. The results show that the resistance wall can influence the die forging load, metal filling effect and forging defect of steering forging by changing the flow of metal. The existence of the resistance wall can effectively promote the formation of the steering knuckle and improve the filling of dissatisfaction when there is no resistance wall. However, unreasonable design of the resistance wall results in increased forming load, the occurrence of folding defects and uncoordinated metal flow. By adjusting the height of the resistance wall to change its obstruction, a reasonable design scheme is obtained, which provides a reference for production.