锻压技术

镁合金厚壁锥壳构件内环筋挤压成形金属充填规律研究

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

作者：贾艳楠吴耀金薛勇刘伟军丁雪峰

单位：中北大学

关键词：镁合金斜楔加载挤压内环筋数值模拟

分类号：TG379

出版年,卷(期):页码：2015,40(2):93-97

摘要：

针对镁合金高内环筋厚壁壳体构件旋压技术无法成形制造的现状，提出一种内环筋斜楔加载的挤压成形方法。应用Deform-3D软件对AZ80镁合金厚壁锥壳构件内环筋挤压成形金属充填规律进行了有限元模拟研究。主要分析了成形过程中内环筋部位金属的充填行为和等效应变分布规律，研究了模具圆角半径和倾斜角对金属流动规律的影响。模拟结果表明：模具圆角半径的增大对筋部的充填有促进作用；在模具圆角半径一定的情况下，随着模具倾斜角的减小，筋部成形质量变好，筋部等效应变分布均匀。最后通过实验试制，获得合格的内环筋，验证了新工艺的可行性。

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.

基金项目：

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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