薄壁曲面构件旋压成形工艺  

Spinning process for thin-walled spherical part

作　　者：侯令华 李新和 俞大辉[2] 杨剑 Hou Linghua;Li Xinhe;Yu Dahui;Yang Jian(Light Alloy Research Institute,Central South University,Changsha 410083,China;State Key Laboratory of High Performance and Complex Manufacturing,Central South University,Changsha 410083,China)

机构地区：[1]中南大学轻合金研究院,湖南长沙410083 [2]中南大学高性能复杂制造国家重点实验室,湖南长沙410083

出　　处：《锻压技术》2018年第11期59-65,共7页Forging & Stamping Technology

基　　金：国家重点基础研究发展计划(973)资助项目(2014CB046600)

摘　　要：由于薄壁大径厚比曲面构件法兰的弱刚性,旋压成形中极易出现法兰起皱失稳缺陷。运用能量守恒原理推导出薄壁曲面构件法兰起皱临界条件,提出了法兰结构强化旋压新工艺。利用MSC. Marc有限元分析软件,建立法兰结构强化旋压成形有限元模型,并通过仿真数据对比分析了有无施加法兰结构强化工艺之间的周向应力及径向应力,验证了法兰起皱临界条件的正确性。研究表明,采用法兰结构强化旋压新工艺,最大周向应力值明显降低,最大径向应力值无明显变化。旋压实验表明,曲面构件法兰强化旋压工艺能有效抑制曲面构件法兰起皱失稳。Urinkle defect tends to occur in the flange region during the spinning process,because the flange for thin-walled spherical part with large diameter-thickness ratio has a lower rigidity. Therefore,the critical condition of flange wrinkling was deduced based on the law of energy conservation,and a new strengthening spinning process of flange structure was put forward. Then,a finite element simulation model of strengthening spinning for flange structure was established by finite element analysis software MSC. Marc. Through the comparison of simulation data,the circumferential stress and the radial stress with or without strengthening spinning for flange structure were analyzed,and the effectiveness of the critical condition of flange wrinkling was verified. The results show that the maximum circumferential stress value decreases obviously by the new strengthening spinning process of flange structure,and the maximum radial stress value has no obvious change. The spinning test shows the flange wrinkling can be effectively suppressed by the new strengthening spinning process of flange structure for spherical part.

关 键 词：曲面构件 旋压 起皱缺陷 起皱临界条件 法兰结构强化 有限元模拟 

分 类 号：TG156[金属学及工艺—热处理]