内压对小直径薄壁U型波纹管成形规律的影响  

Effect of internal pressure on forming law of thin-wall U-shaped bellows with small diameter

作　　者：李凯 苗晓军 皇涛[2,3] 蒋宇宁 赵家鑫 岳伟 白璐阁 郝留成 宋克兴 Li Kai;Miao Xiaojun;Huang Tao;Jiang Yuning;Zhao Jiaxin;Yue Wei;Bai Luge;Hao Liucheng;Song Kexing(Pinggao Group Co.,Ltd.,Pingdingshan 467001,China;School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Henan Collaborative Innovation Center for Nonferrous Metals Common Technology,Luoyang 471023,China)

机构地区：[1]平高集团有限公司,河南平顶山467001 [2]河南科技大学材料科学与工程学院,河南洛阳471023 [3]有色金属共性技术河南省协同创新中心,河南洛阳471023

出　　处：《锻压技术》2020年第10期66-72,79,共8页Forging & Stamping Technology

基　　金：国家自然科学基金资助项目(51875176);国家电网有限公司总部科技资助项目(B491 BG190013)。

摘　　要：为了研究内压对小直径薄壁U型波纹管的壁厚减薄率的影响行为,采用数值模拟分析的方法,基于ANSYS/LS-DYNA有限元分析软件,建立了小直径薄壁U型316L奥氏体不锈钢波纹管的内压成形过程的有限元模型,获得了小直径薄壁U型波纹管内压成形过程中的等效应力、等效应变和壁厚减薄率的分布演变规律。在相同的轴向进给位移条件下,获得了不同的内压对小直径薄壁U型波纹管的壁厚减薄率分布的影响规律,获得了成形质量合格的小直径薄壁U型波纹管的成形内压范围,研究结果为小直径薄壁U型波纹管的内压成形工艺的设计提供了数据参考。In order to study the effect behavior of internal pressure on the wall thickness thinning rate of thin-wall U-shaped bellows with small diameter,using the numerical simulation analysis method,the finite element model of internal pressure forming process for the thinwall U-shaped 316 L austenitic stainless steel bellows with small diameter was established based on ANSYS/LS-DYNA finite element analysis software. The distributions and evolution laws of equivalent stress,equivalent strain and wall thickness thinning rate during the internal pressure forming process of thin-wall U-shaped bellows with small diameter were obtained. The effect law of different pressures on the wall distribution of thickness thinning rate for thin-wall U-shaped bellows with small diameter under the same axial feeding displacement conditions was obtained. The forming internal pressure range of qualified forming thin-wall U-shaped bellows with small diameter was obtained. The research results provide the data reference to the design of internal pressure forming process for thin-wall U-shaped bellows with small diameter.

关 键 词：波纹管 内压 成形规律 壁厚减薄率 数值模拟 

分 类 号：TG376[金属学及工艺—金属压力加工]