Iranian Journal of Mechanical Engineering Transactions of ISME

Iranian Journal of Mechanical Engineering Transactions of ISME

Investigation of the Effect of Gas Pressure Forming Parameters on Mold Filling and Sheet Thickness Distribution

Authors
amin kolahdooz 1
sasan aminian dehkordi 2
1 Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Isfahan, Iran. School of Engineering and Sustainable Development, De Montfort University, Leicester, UK.
2 Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Isfahan, Iran
10.30506/ijmep.2021.105449.1557
Abstract
New forming processes should be capable of manufacturing complex and high quality
components in addition to low production costs and high production speeds. The gas pressure
forming process is one of the methods used in forming these parts. In this research, the
formation of Al-A356 alloy sheet in incomplete cone with gas pressure process has been studied
numerically and experimentally. In general, it can be said that the purpose of this study is to
investigate the effect of parameters such as the ratio of diameter to height of the die, angle,
temperature and pressure. In order to determine the effect of parameters, filling the corners of
the die and distributing the thickness of the parts under different pressures has been
investigated. Also, for simulating validation, the simulation results were first compared with
experimental tests. The results show that the mold filling will improve around 15% by
increasing the pressure from 1 bar to 8 bar. However, is reduced to less than 0.5 mm.
Although, the mold filling increased by decreasing of the ratio of diameter to height but the
critical thickness of the sheet is decreased around 14%. It was also found that for having a
proper mold filling, it is necessary to increase the pressure value around 25% when the cone
angle decrease from 30º to 0º. The results also showed that by increasing the temperature from
350°C to 550°C, the required pressure for filling the mold decreased from 8 to 2 bar.
Keywords
Gas Forming
Al-A356 alloy
FEM
conical closed die

Subjects

[1] ولی­نژاد، ع.، "مهندسی عملی شکل دادن"، نشر طراح، (1381)، چاپ اول.
[2] Kazemi, A., Nourouzi, S., Kolahdooz, A., and Gorji, A., "Experimental Investigation of
Thixoforging Process on Microstructure and Mechanical Properties of the Centrifugal Pump
Flange", Journal of Mechanical Science and Technology, Vol. 29, No. 7, pp. 2957-2965,
(2015).
[3] Kolahdooz, A., Towsyfyan, H., Adnani Salehi, S.A., Ghayyem, M., and Mosaedi, F., "A
Novel Optimization Approach Applied to Multi-pass Turning Process", Journal of Modern
Processes in Manufacturing and Production, Vol. 6, No. 2, pp. 5-19, (2017).
[4] Lee, Y., Kim, J.J., Kwon, Y.N., and Yoon, E.Y., "Formability and Grain Size of AZ31 Sheet
in Gas Blow Forming Process", Procedia Engineering, Vol. 81, pp. 748-753, (2014).
[5] Hwang, Y., Yang, J.S., Chen, T.R., and Huang, J.C., "Analysis of Superplastic Sheet-metal
Forming in a Circular Closed-die Considering Non-uniform Thinning", Journal of Materials
Processing Technology, Vol. 65, No. 1-3, pp. 215-227, (1997).
[6] آقاجانلو، ب.، حسینی­پور، س.ج.، جمشیدی اول، ح، "ساخت صفحات دوقطبی پیل سوختی از جنس فولاد زنگ‌نزن 304 به کمک فرآیند شکل‌دهی داغ با دمش گاز"، نشریه مهندسی مکانیک امیرکبیر، دوره 50، شماره 3، صفحه 589 تا 600، مرداد و شهریور (1397).
[7] Wu, H. Y., Sun, P.H., Zhu, F.J., Liu, H.C., and Chiu, C.H., "Tensile Properties and Shallow
Pan Rapid Gas Blow Forming of Commercial Fine-grained Mg Alloy AZ31B Thin Sheet",
Procedia Engineering, Vol. 36, pp. 329-334, (2012).
[8] Hwang, Y. M., Yanga, J.S., Chena, T.R., Huanga, J.C., and Wua, W.U., "Analysis of
Superplastic Blow-forming in a Conical Closed Die", International Journal of Mechanical
Sciences, Vol. 40, No. 9, pp. 867-885, (1998).
[9] Aksenov, S.A., and Sorgente, D., "Investigation of Stress-strain Behavior of a Sheet
Material using Free Bulging Test", Procedia Engineering, Vol. 207, pp. 1892-1897, (2017).
[10] Sorgente, D., Palumbo G., Scintilla, L.D., and Tricarico, L., "Gas Forming of An AZ31
Magnesium Alloy at Elevated Strain Rates", The International Journal of Advanced
Manufacturing Technology, Vol. 83, No. 5-8, pp. 861-872, (2016).
[11] Hwang, Y., and Lay, H., "Study on Superplastic Blow-forming in a Rectangular Closeddie",
Journal of Materials Processing Technology, Vol. 140, No. 1-3, pp. 426-431, (2003).
[12] Hojjati, M., Zoorabadi, M., and Hosseinipour, S., "Optimization of Superplastic
Hydroforming Process of Aluminium Alloy 5083", Journal of Materials Processing
Technology, Vol. 205, No. 1-3, pp. 482-488, (2008).
[13] Wu, H. Y., Tzou, M.D., Huang, C.C., and Tsai, H.H., "Modified Male Die Rapid Gas
Blow Forming of Fine-grained Mg Alloy AZ31B Thin Sheet", The International Journal
of Advanced Manufacturing Technology, Vol. 80, No. 5-8, pp. 1241-1252, (2015).
[14] Hambli, R., and Potiron, A., "Comparison between 2D and 3D Numerical Modeling of
Superplastic Forming Processes", Computer Methods in Applied Mechanics and
Engineering, Vol. 190, No. 37-38, pp. 4871-4880, (2001).
[15] طاهری آهنگر، ع.، بخشی، م.، حسینی­پور، س.ج.، گرجی، ح، "مطالعه تجربی و شبیه­سازی اجزای محدود برای تعیین پنجره شکل­دهی لوله­های آلومینیومی -O6063 در فرآیند هیدروفرمینگ گرم"، نشریه مهندسی مکانیک امیرکبیر، مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 29 آبان (1397).
[16] Chen, Y., Kibble, K., Hall, R., and Huang X., "Numerical Analysis of Superplastic Blow
Forming of Ti–6Al–4V Alloys", Materials & Design, Vol. 22, No. 8, pp. 679-685, (2001).
[17] Kolahdooz, A., and Aminian, S., "Effects of Important Parameters in the Production of Al-
A356 Alloy by Semi-solid Forming Process", Journal of Materials Research and
Technology, Vol. 8, No, 1, pp. 189-198, (2019).
[18] پورکمالی انارکی، ع.، الوندی، ا.، "تحلیل عددی-تجربی خصوصیات ماده A356 در بارگذاری خستگی کم چرخه"، نشریه مهندسی مکانیک امیرکبیر، دوره 48، شماره 2، صفحه 147 تا 156، تابستان (1395).
[19] Giuliano, G., and Franchitti, S., "The Determination of Material Parameters from
Superplastic Free-bulging Tests at Constant Pressure", International Journal of Machine
Tools and Manufacture, Vol. 48, No. 12-13, pp. 1519-1522, (2008).
[20] Li, G.Y., Tan, M.J., Liew, and K.M., "Three-dimensional Modeling and Simulation of
Superplastic Forming", Journal of Materials Processing Technology, Vol. 150, pp. 76-83,
(2004).

  • Receive Date 19 March 2019
  • Revise Date 16 August 2019
  • Accept Date 17 April 2021