锻压技术

方矩形焊管多规格柔性冷弯成形回弹分析

英文标题：Springback analysis on multi specification flexible cold bending for square rectangular welded pipe

作者：管本勇丁武学任子帅

分类号：TH162

出版年,卷(期):页码：2024,49(4):97-103

摘要：

针对方矩形焊管在冷弯成形过程中的回弹问题，利用COPRA软件进行冷弯成形工艺设计，确定了适用于柔性制造的工艺参数，基于ABAQUS软件建立了8种冷弯成形有限元模型，先后进行显示动力学分析和静力学分析，模拟板材冷弯成形和卸载过程，得到了不同模型各道次的回弹角度，同时，通过单因素分析法研究了板料厚度、侧壁高度和成形宽度对回弹的影响。结果表明：最终成形角相同时，回弹角度呈先增大后减小的趋势；增大板料厚度、成形宽度和减小侧壁高度均会分别导致冷弯成形中各道次的回弹角度减小，且回弹角度与板料厚度成线性关系；在进行弯角二的冷弯成形过程中，宽度方向板材的等效应力基本不变，弯角一不会发生回弹现象。

For the springback problem of square rectangular welded pipes during the cold bending process, the cold bending process design was conducted by COPRA software to determine the process parameters suitable for the flexible manufacturing, and eight finite element models for cold bending were established by ABAQUS software. Then, the dynamic analysis and static analysis were performed to simulate the cold bending and unloading processes of sheet. Furthermore, the springback angles for each pass of the different models were obtained, and the influences of sheet thickness, sidewall height and forming width on the springback were studied by a single-factor analysis method at the same time. The results show that when the final forming angle is the same, the springback angle shows a trend of increasing first and then decreasing. Increasing the sheet thickness and forming width, and reducing the sidewall height could lead to the decrease in the springback angle of each pass in the cold bending, and the springback angle is linearly related to the sheet thickness. During the cold bending process of the bending angle 2, the equivalent stress of sheet in the width direction remains basically unchanged, and there is no springback phenomenon in the bending angle 1.

基金项目：

作者简介：管本勇（1997-），男，硕士研究生 E-mail：guanby97@163.com 通信作者：丁武学（1966-），男，硕士，副教授 E-mail：wuxuexie@mail.njust.edu.cn

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