Numerical study on the effect of input variations on bulge height in hot tube metal gas forming process

Subject Areas : Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering

مهدی  چوگان ¹ (Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Iran)
محسن  لوح موسوی ² (گروه مهندسی مکانیک، واحد خمینی شهر، دانشگاه آزاد اسلامی، خمینی شهر، ایران)

Received: 2016-04-05 Accepted : 2016-06-07 Published : 2016-11-21

Keywords: Finite Element Method, Hot Metal Gas Forming, Internal pressure,

Abstract :

.Hot metal gas forming of tubes can be used in various industries such as automotive and aerospace industries. In this process tube is formed at elevated temperatures, by using gas instead of fluid pressure. Lower required pressure and low power are its advantages in comparison to hydroforming process. In this paper, a hot metal gas bulging process of an aluminum alloy tube has been investigated by finite element method. In addition, The HMGF process was simulated by ) Dynamic, Temp-Disp, Explicit( because of the temperature distribution along the tube length, whereas temperature was simplified and assumed to be uniform in analytical method. The bulge height parameter was investigated by changing the input variations such as internal pressure, outer diameter, die entry radius, initial tube length and initial tube wall thickness in numerical method. The numerical result shows that the input variations have significant effects on tube bulge height in this process.

References:

[1] Keigler M., Bauer H., Harrison D., De Silva A. “ Enhancing the formability of aluminum components via temperature controlled Hydroforming”, Journal of Material processing Technology, Vol 167, 2005, PP 363-370.

[2] Vadillo L., Santos M.T., Gutierrez M.A., Perez I., Gonzalez V., Uthiesangsuk V.,” simulation and Experimental results of the Hot metal gas forming Technology for high strength steel and stainless steel tubes forming”, API conference Proceedings, Vol 908, 2007.

[3] Yi H.K., E.J. Pavlina E.J., C.J. Van Tyne C.J., and Y.H. Moon Y.H.," Application of a combined heating system for the warm hydroforming of lightweight alloy tubes", journal of materials processing technology, Vol. 203, 2012, pp 532-536.

[4] Maeno T., Mori K., Fujimoto K.,” Development of The Hot Gas Bulging Process for Aluminum Alloy Tube Using Resistance Heating”, Key engineering Materials, Vol 410-411, 2009, PP 315-323.

[5] Hwang Y.M., Su Y.H., Cen B.J.,” Tube hydroforming of magnesium alloys at elevated temperatures”, Journal of Engineering materials and technology, Vol 32, 2010.

[6] Maeno T., Mori K.,Unou C.,” Optimization of condition in Hot Gas Bulging of Aluminum Alloy tube using Resistance Heating set into dies”, Key engineering Materials, Vol 473, 2011, PP 60-74

[7] Zhu-bin H., Bu-gang T., Chang-yang Ch., Zhio-biao W., Shjian Y., Kia-lun Zh.,” Mechanical properties and formability of TA2 extrude tube for hot metal gas forming at elevated temrature”, Transactions of Nonferrous Metals society of china, Vol 22, 2012, PP 479-484.

[8] Maeno T., Mori K., Adachi K.,” Gas forming of ultra-high strength steel hollow part using air filled into sealed tube and resistant heating” Journal of Materials processing technology, Vol 214, 2014, PP 97-105.

[9] Paul A., Strano M.,” The Influence of Process Variables on the Gas Forming and press Hardening of Steel Tubes” Journal of Materials Processing Technology,2015.

[10] چوگان، م.، تحلیل عددی و تجربی فرآیند بالج گرم لوله آلومینیومی به وسیله ی فشار هوا و مشعل حرارتی، دانشکده مکانیک، دانشگاه آزاد اسلامی واحد خمینی شهر، 1394.