Transactions of Materials and Heat Treatment

Title：Enveloping forming process analysis and metal streamlines simulation on aluminum alloy complex components with lateral branch

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ClassificationCode：TG312

year,vol(issue):pagenumber：2022,47(4):141-149

Abstract：

For geometric characteristics of aluminum alloy complex components with lateral branch, the enveloping forming process was proposed to form the components, and its forming process was simulated by software DEFORM-3D. Then, the change characteristics of effective strain and forming load were analyzed, and the distribution and evolution characteristics of metal streamlines were simulated in the enveloping forming process of the components by the Flownet function of software DEFORM-3D. Finally, the experiment was carried out to verify the simulation results. The results show that in the enveloping forming process of the aluminum alloy complex components with lateral branch, the structures such as bosses, lateral branches and flashes on the components are gradually formed by the action of enveloping die and concave die. The semi-conical part on the right side of the component is a large deformation area, and the cylindrical part on the left side is a small deformation area. The forming load of the component fluctuates periodically with the increasing of forming time in the enveloping forming stage, and the forming load decreases gradually with the increasing of holding time and then presents a stable periodic fluctuation in the enveloping die holding and shaping stage. The metal streamlines in the middle area and the semi-conical area on the right side of the component vary greatly, and the metal streamlines appear through-flow, eddy-flow and backflow phenomenon at the boss. By comparison, the simulation results are in good agreement with the experimental results.

Funds：

国家自然科学基金资助项目(51805391);高等学校学科创新引智计划资助项目（B17034）；教育部创新团队发展计划项目(IRT_17R83)

作者简介：冯玮（1973-），女，博士，副教授，硕士生导师 E-mail：fw7757@sina.com

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