Transactions of Materials and Heat Treatment

Title：Structure of extrusion mold for porous thin-walled aluminum profiles

Authors： Liu Guoyong1 2 Chen Zemin1 2 Zhu Shi′an3 Li Xinyue4 Zhu Dongmei1

Unit：（1.School of Mechanical Engineering University of Science and Technology Beijing Beijing 100083 China 2.Shunde Innovation School University of Science and Technology Beijing Foshan 528399 China 3.Guangdong Haomei New Material Co. Ltd. Qingyuan 511540 China 4.China Institute of Atomic Energy Beijing 102413 China）

KeyWords： porous thin-walled aluminum profile metal flow extrusion mold temperature uniformity metal flow uniforming

ClassificationCode：TG375+41

year,vol(issue):pagenumber：2023,48(6):162-170

Abstract：

For an aluminum alloy profile used as automobile floor, aiming to the characteristics of large-scale profiles with large differences in length and width, large wall thickness difference, porous and thin wall, the metal flow during the extrusion process was numerically simulated in a steady state by finite element simulation software HyperXtrude, and the influence of mold structure on extrusion was analyzed to explore the causes of defects in the profiles. Then, with the goal of improving the uniformity of metal flow in the profile section, the extrusion mold structure was improved by expanding the drainage groove, reducing the shunt hole and adjusting the working belt. The results show that after the extrusion mold structure is improved, the mean square deviation (SDV) value of metal flow velocity in the profile section, the mean square deviation (SDT) value of temperature in the profile section, and the maximum stress value of the profile are reduced to 2.08 mm·s-1, 8.25 ℃ and 27.4 MPa, respectively. After the improvement, the metal flow velocity uniformity and temperature distribution uniformity of the profile section are significantly improved, and the problems of profile deformation and excessive stress are effectively promoted. The extrusion experiment proves the rationality of the extrusion mold structure, which can provide a reference for the design of the same type of aluminum profile extrusion die.

Funds：

广东省重点领域研发计划项目(2020B010186002)

刘国勇（1969-），男，博士，副教授

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