方矩形焊管多规格柔性冷弯成形回弹分析  

Springback analysis on multi specification flexible cold bending for square rectangular welded pipe

作　　者：管本勇 丁武学[1] 任子帅 Guan Benyong;Ding Wuxue;Ren Zishuai(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《锻压技术》2024年第4期97-103,111,共8页Forging & Stamping Technology

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.

关 键 词：方矩形焊管 冷弯成形 柔性制造 回弹 板料厚度 侧壁高度 成形宽度 

分 类 号：TH162[机械工程—机械制造及自动化]