锻压技术

内压对小直径薄壁U型波纹管成形规律的影响

英文标题：Effect of internal pressure on forming law of thin-wall U-shaped bellows with small diamete

作者：李凯苗晓军皇涛蒋宇宁赵家鑫

分类号：TG376

出版年,卷(期):页码：2020,45(10):66-72

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 thin-wall U-shaped 316L 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.

基金项目：

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）

李凯（1984-），男，硕士，高级工程师 E-mail：007zzulikai@163.com 通讯作者：皇涛（1983-），男，博士，副教授 E-mail：huangtao@haust.edu.cn

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