Investigation of hot metal gas forming process of square parts

Nasrollahzade, M.; Hashemi, S. J.; Moslemi Naeini, H.; Roohi, Amir H.; Imani Shahabad, Sh.

doi:10.22061/jcarme.2019.3914.1457

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	Investigation of hot metal gas forming process of square parts
Journal of Computational & Applied Research in Mechanical Engineering (JCARME)
مقاله 10، دوره 10، شماره 1 - شماره پیاپی 19، مهر 2020، صفحه 125-138 اصل مقاله (1.69 M)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22061/jcarme.2019.3914.1457
نویسندگان
M. Nasrollahzade¹؛ S. J. Hashemi^* ²؛ H. Moslemi Naeini¹؛ Amir H. Roohi³؛ Sh. Imani Shahabad¹
¹Department of Mechanical Engineering, Faculty of Engineering, Tarbiat Modares University, Tehran, Iran
²Department of Mechanical Engineering, Faculty of Enghelab Eslami, Tehran Branch, Technical and Vocational University (TVU), Tehran, Iran
³Department of Mechanical Engineering, Faculty of Industrial and Mechanical Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran
تاریخ دریافت: 30 تیر 1397، تاریخ بازنگری: 18 اسفند 1397، تاریخ پذیرش: 25 فروردین 1398
چکیده
Aluminum alloys are considered a lot in the automotive and aerospace industry because of their high strength to weight ratio. In this manuscript, the gas forming process of aluminum AA6063 tubes at high temperatures up to 500°C is investigated, through experimental and numerical tests. Therefore, an experimental setup is prepared and so, tube specimens are formed in a die with square cross section. Finite element simulation of the hot gas forming process is carried out to investigate the effects of process parameters including time period of forming process, temperature, and loading path. Uniaxial tensile tests under various temperatures and strain rates is performed, in order to obtain flow stress curves of the material. Corner radius and thickness distribution of tubular formed parts is investigated. The results show smaller corner radii could be formed at higher temperatures, whereas lower forming pressure is necessary. Increasing the time period of the process enhances the corners of the specimens to be formed. In addition, the maximum of formability is obtained when the gas pressure increases rapidly at the beginning of the process. However, the increasing rate of gas pressure must be reduced to form a smaller corner radius.
کلیدواژه‌ها
Gas forming؛ High temperature؛ Aluminum؛ Square cross-section part؛ Corner radius

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Investigation of hot metal gas forming process of square parts