挤出口模有限元仿真研究进展
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摘要
综述了近10年间数值模拟在挤出口模应用中的研究进展,详细介绍了异型材挤出口模、气辅挤出和共挤出的数值模拟研究成果。在异型材挤出口模方面,其难点在于复杂流道结构的设计,而利用Polyflow软件指导实际的复杂口模设计取得了显著进展;气辅挤出以及气辅共挤成型能够明显降低挤出胀大比,利用数值模拟虽对气辅挤出成型进行了理论探索,但在大型工业化应用上仍存在许多不足;在共挤出仿真过程中,Polyflow软件可较好地预测简单截面口模共挤出的挤出界面位置。
This paper overviewed research progresses in numerical simulation of extrusion die application in the recent decade.Research findings in the numerical simulation of extrusion die,gas-assisted extrusion and co-extrusion were introduced in detail.The complex flow channel structure was considered as a difficulty for the design of profile dies,and a significant progress in the design of complex dies was achieved with the aid of Polyflow~? software.Compared with traditional extrusion,gas-assisted extrusion and gas-assisted co-extrusion had more advantages for reducing die-swell ratio. Simulation of gas-assisted extrusion only provided a theoretical evaluation,and however,it was still in shortage of enough applications in large-scale industrialization.Polyflowsoftware could approximately predict the location of interfaces for extrudates during simple die extrusion.
This paper overviewed research progresses in numerical simulation of extrusion die application in the recent decade.Research findings in the numerical simulation of extrusion die,gas-assisted extrusion and co-extrusion were introduced in detail.The complex flow channel structure was considered as a difficulty for the design of profile dies,and a significant progress in the design of complex dies was achieved with the aid of Polyflow~? software.Compared with traditional extrusion,gas-assisted extrusion and gas-assisted co-extrusion had more advantages for reducing die-swell ratio. Simulation of gas-assisted extrusion only provided a theoretical evaluation,and however,it was still in shortage of enough applications in large-scale industrialization.Polyflowsoftware could approximately predict the location of interfaces for extrudates during simple die extrusion.
引文
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