铝合金异形截面大型环件胀形工艺及优化  

Bulging technology and optimization on large ring with shaped section of aluminum alloy

作　　者：魏辉 兰箭[1,2] Wei Hui;Lan Jian(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;Hubei Key Laboratory of Advanced Technology for Automotive Components Technology,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070 [2]武汉理工大学现代汽车零部件技术湖北省重点实验室,湖北武汉430070

出　　处：《锻压技术》2020年第8期94-98,105,共6页Forging & Stamping Technology

基　　金：国家自然科学基金面上项目(51975439)。

摘　　要：针对2219铝合金5 m级异形截面机匣环锻件,展开冷胀形工艺分析和优化,以达到使环件直径扩大至目标尺寸且使环件各部分的应变均匀性提高的目的。设计了环件的冷胀形工艺,并利用Deform-3D对环件冷胀形工艺进行有限元分析,提取有限元分析结果,并在环件不同位置做应力分析,得出了冷胀形工艺下环件的变形特点和变形规律;结合环件冷胀形工艺的变形特点,对原有胀形工艺进行优化,提高了环件各部分的应变均匀性,并通过实际的胀形工艺实验验证了工艺的有效性。另外,设计了环件胀形时瓣模转动的方案,使环件变形得到优化,优化后的胀形工艺使环件各区域的应变均匀性有了较大提升,为2219铝合金5 m级异形截面机匣环锻件冷胀形工艺提供了一个可靠的理论分析和优化方案。For the five-meter casing ring forgings with shaped section of 2219 aluminum alloy,the cold bulging process analysis and optimization were carried out to enlarge the diameter of ring to the target size and improve the strain uniformity of each part of ring.Then,the cold bulging technology of ring was designed,and the cold bulging process of ring was analyzed by Deform 3 D.Furthermore,the finite element analysis results were extracted,the stress analysis at different locations of ring was conducted,and the deformation characteristics and the deformation rule of ring in the cold bulging process were obtained.Combined with the deformation characteristics of cold bulging technology for ring,the original bulging process was optimized to improve the strain uniformity of each part of ring,and the effectiveness of the process was verified by the actual bulging process experiments.Finally,when the ring was bulged,the split mold rotation scheme was designed to achieve the deformation optimization of ring.And the optimized bulging process greatly improves the strain uniformity of each area of ring,which provides a reliable theoretical analysis and optimization scheme for the cold bulging process of five-meter casing ring forgings with shaped section of 2219 aluminum alloy.

关 键 词：铝合金 异性截面 冷胀形 应力分析 应变均匀性 

分 类 号：TG386[金属学及工艺—金属压力加工]