大口径直缝焊管O成形过程的有限元分析  

An finite element analysis of O-forming process in forming of large longitudinal seam welded pipe

作　　者：刘京雷[1] 黄克坚[1] 阮锋[1] 

机构地区：[1]华南理工大学机械工程学院

出　　处：《材料科学与工艺》2007年第5期693-696,共4页Materials Science and Technology

基　　金：广东省广州市博士后科研基金资助项目;广州市番禺区科技计划项目(2003B03).

摘　　要：采用有限元分析方法,研究了焊管UOE成形工艺O成形过程模具载荷、板料变形模式和曲率分布变化,揭示了板料O成形过程变形的机理.结果表明,O成形过程是一个悬弧分段细分弯曲的过程,板料横截面形状曲率峰由单一峰向多峰演变,曲率峰峰间距离均匀.载荷在成形过程产生相应的阶段性变化,各段位移载荷曲线具有相似性,并且载荷随悬弧的细分明显增加.O成形过程分为4个阶段:U形口合扰、直边弯曲、悬弧二次弯曲和悬弧多次弯曲过程.Detailed finite element analyses were conducted on O-forming in UOE process for welded pipe, in-cluding process loading, blank forming mode and curvature evolvement . And the forming mechanics of O-forming were discussed. The analysis show that O-forming is accomplished by bending of subdividing suspenu arc, characterized by evolvement of curvature peaks form one to multiple peaks, which have nearly equal peak-to-peak distance. Process loading has corresponding episodic changes, and each episodic curve is simi- lar. loading has a considerable increase with the decrease of suspend arc length. O-forming can be divided in- to four stages： U-formed edge contacting, straight section bending, suspend arc secondary bending and multi- bending.

关 键 词：焊管 UOE成形 弯曲 有限元分析 

分 类 号：TG301[金属学及工艺—金属压力加工]