先进充液柔性成形技术及其关键参数研究

基于所提出的具有均匀压边力并轴向加压的板材充液柔性成形技术,面向板材液压柔性成形技术的普遍规律,成形出拉深比较高的铝合金筒形件以及其他复杂形状的零件如方锥盒形件、方盒形件、轴对称锥形件等,对其中的关键技术如初始液压加载状态、液压加载最优路径、破裂控制等一些关键参数进行了研究和优化;考虑板平面方向性系数的影响,利用数值模拟的手段对其成形过程进行了分析,指导实验研究,得出了有益的结论。

管件内高压成形及其在汽车工业中的应用现状

利用管件内高压成形技术成形的工件具有质量轻、刚度好、装配零件少、后续装配工序少等诸多优点 ,在国外该项技术已被广泛地运用到汽车、宇航领域中。介绍并探讨了管件内高压成形技术的原理、优点。

板液压成形及无模充液拉深技术

板液压成形技术是液压成形技术中重要的一类 ,广泛地应用于宇航、汽车等工业领域。近年来由于新材料和复杂几何形状零件的不断出现 ,更加突出此种技术的关键性。本文就板液压成形技术原理、数值模拟技术和分类进行了研究 ,探讨了此种技术将来的发展 ,介绍了基于板液压成形技术的无模充液拉深技术 ,利用实验和数值模拟技术对此技术进行了分析 ,验证了此项技术的可行性 。

Forming Process of Strong Anisotropic Material Based on the Hydrodynamic Deep Drawing with Radial Pressure

The hydrodynamic deep drawing process enables net shape or near net shape forming of complicated sheet metal parts made from difficultly forming materials, such as aluminium or high strength steels. Based on the conventional hydrodynamic deep drawing process, a new process, hydrodynamic deep drawing process, in which radial pressure is applied to the rim of the blank, is proposed. This new process has been analysed using FEM simulations and the obtained results have been compared with the experimental results. The material used in the experiments was Al-Mg-Si alloy, and in the FEM-simulations the elastic-plastic behaviour of Al-Mg-Si alloy was modelled using Barlat＇s 89 yield criteria.