Transactions of Materials and Heat Treatment

Title：Research on metal filling regularity of inner annular rib extrusion forming in the thick conical shell of magnesium alloy parts

Authors： Jia Yannan Wu Yaojin Xue Yong Liu Weijun Ding Xuefeng

Unit： North University of China

KeyWords： magnesium alloy wedge-loaded extrusion inner annular rib numerical simulation

ClassificationCode：TG379

year,vol(issue):pagenumber：2015,40(2):93-97

Abstract：

For the current difficulty in forming inner annular rib in the thick conical shell of magnesium alloy parts by the spinning technology, a new extrusion forming method of wedge-loaded inner annular rib was put forward. By means of numerical simulation with Deform-3D software，the metal filling regularity of the extrusion forming process of AZ80 alloy thick conical shell parts with inner annular rib was simulated. The filling behavior and effective strain distribution regularity of inner annular rib in extrusion forming process were analyzed, and the influences of die corner radius and tilt angle on the metal filling regularity were studied. The simulation results show that the increase of die corner radius helps to fill the rib portion. When the corner radius of the die is constant, forming quality and the effective strain distribution of the rib portion become better with the decrease of the inclination angle. Finally, the experiment is confirmed with the simulation results, qualified inner annular rib is obtained and the feasibility of the new process is further validated.

Funds：

山西省自然科学基金资助项目(2013011022-5, 2012011022-2)

贾艳楠（1987-），男，硕士研究生

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