球形件液压胀形成形方案探究

目的解决球形件传统成形工艺冗余、困难的问题。方法提出了3种液压胀形成形方案,并利用有限元软件Dynaform,对每种方案进行了数值模拟。结果通过模拟分析,确定了各方案最佳模拟结果,获得了各方案壁厚分布情况,明确了成形缺陷形式以及产生的原因。最小壁厚位于球心横截面处,是危险区;当合模补料130 mm时,模拟结果显示最大壁厚减薄率最小,为16.5%。结论利用液压胀形可以成功成形球形件;补料方式对成形结果有很大的影响,合模补料成形质量最优,端头补料次之,无补料最差。

Process of Hydroforming for Spherical Component

Objective To solve the problem of forming difficulty and process redundancy for common deep drawing of spherical component. Methods Three hydroforming schemes were designed and each was numerically simulated by the finite element software Dynaform. Results The best simulation results of the three schemes, the simulation wall thickness distribution, as well as the types and fundamentals of failures were investigated. The minimum thickness was located in the cross-section through the spherical center, which was the danger area. When the feeding of the compound die was 130mm, the simulated maximum thinning rate was 16. 5% which was the minimum. Conclusion The results showed that this spherical component could be successfully formed by hydroforming. The type of feeding had a great impact on the forming results.The outcome of feeding by compound die was the best among the three, and the outcome of feeding by pusher was better than without feeding.