Transactions of Materials and Heat Treatment

Title：Optimization on extrusion process for large reinforced thin-walled aluminum profile based on experimental design and response surface method

Authors： Liu Hui Liu Tengfei Chen Zongqiang Wang Hailong Gao Kangjun Zhou Zhiyu Tian Changren Chen Liang

Unit： Beijing Institute of Aeronautical Materials Beijing Engineering Research Center of Advanced Aluminum Alloys and Application Shandong University

KeyWords： aluminum profile perforated needle extrusion large reinforced thin-walled aluminum profile response surface method extrusion speed

ClassificationCode：TG146.21；TG379

year,vol(issue):pagenumber：2022,47(5):144-152

Abstract：

For a large reinforced thin-walled aluminum profile, based on BBD test design, response surface method and finite element simulation, the response function relationships between mean square deviation of flow velocity for the profile section at the outlet of working belt, maximum extrusion force and design variable were established, and the optimization of perforated needle extrusion forming process was carried out. The research results show that the extrusion speed is the most significant factor affecting the uniformity of material flow rate and the extrusion force for large reinforced thin-walled aluminum profile during perforated needle extrusion forming. After extrusion process optimization，the optimal combination of process parameters is the billet temperature of 509.2 ℃, the die temperature of 506.1 ℃, the extrusion container temperature of 518.8 ℃ and the extrusion speed of 0.2 mm·s-1, and the corresponding material flow rate range is 5.393-8.910 mm·s-1, the temperature range is 509.1-510.3 ℃, the maximum extrusion force is 119.4 MN. Thus, the ideal material flow rate and temperature distribution uniformity are obtained, the structures of cylinder and rib for the profile are uniform, the grain size and appearance are similar, and the extrusion force is significantly reduced, which meets the actual production demand.

Funds：

作者简介：刘惠（1987-），男，硕士，高级工程师，E-mail：liuhuisdu@126.com

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