热等静压成形中包套模具形变的模拟与验证

根据塑性成形相关理论，本文采用MSC．Marc有限元软件对包套模具在热等静压中变形过程进行了模拟。为了验证模拟结果，以不锈钢包套模具为例，完成了测试样件的实验。为了更精确的结果比较，在样件的不同位置上选取了测试点。对比分析模拟和试验对应点的研究结果表明，径向变形的模拟结果偏小，相关点误差达到-5．33％、-13．64％；而轴向变形的模拟结果偏大，相关点的误差达到了7．43％、3．14％和4．57％。研究表明，对于包套模具采用行限元模拟的方法，可以形象、准确描述包套的形变过程，此方法可以为复杂结构的热等静压成形提供参考，实现精确控形。

冷等静压成型包套和模具的设计

主要介绍了冷等静压成型包套和模具的设计步骤，影响包套模具设计的主要因素，模具的形状结构和施压方向，包套材料的选择，还提出了具有代表性的模具结构实例。

Effect of process parameters on sheath forming of continuous extrusion sheathing of aluminum

The effect of flow passage length in the die cavity and extrusion wheel velocity on the shape of aluminum sheath during the continuous extrusion sheathing process was analyzed by using finite element methods based on software DEFORM 3D and experimentally validated. The results show that by increasing the flow passage length, the velocity of metal at the cross-section of sheath tends toward uniformity, the values of the bending angles of sheath gradually approach the ideal value of zero and the cross-section exhibits a better shape. The extrusion wheel velocity has negligible effects on the bending shape and cross-section of the sheath product when a long flow passage is used.