Transactions of Materials and Heat Treatment

Title：Numerical simulation and process optimization on extrusion forming for thin-walled component with I-type longitudinal ribs

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ClassificationCode：TG376

year,vol(issue):pagenumber：2019,44(4):83-89

Abstract：

The thin-walled component with I-type longitudinal ribs has complex structure and uneven wall thickness, and it is easy to occur uneven metal flow during extrusion process, which leads to warping deformation of profile. For the above problem, the influences of process parameters such as extrusion speed, initial temperature of blank and initial temperature of die on the extrusion forming effect were studied by finite element analysis software HyperXtrude. It is found that the increase of initial temperature of blank makes the metal flow velocity more uniform, while the excessive extrusion speed and initial temperature of die increase the non-uniformity of metal flow velocity. Furthermore, the optimum combination of forming process parameters was obtained with the extrusion speed of 2 mm·s-1, the initial temperature of blank of 480 ℃ and the initial temperature of die of 440 ℃ by orthogonal test. Finally, the corresponding extrusion tests were carried out, and the high-precision samples of thin-walled component with I-type longitudinal ribs were successfully obtained. This research work provides a theoretical reference for the extrusion forming process and the die optimization design of such components.

Funds：

国家自然科学基金资助项目（51805391）；中央高校基本科研业务费专项资金资助（2018lll003CG）；高等学校学科创新引智计划资助（B17034）

李贵重（1992-），男，硕士研究生 E-mail：liguichong99@163.com 通讯作者：邓加东（1988-），男，博士，讲师 E-mail：dengjd88@126.com

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