预折刀工作终止位置对包边边界缩进的影响  

Analysis of the Effect of Pre-Hem Steel Stopping Position on Boundary Roll-in

作　　者：李东玮 王磊 张聪 赵亦希[1] LI Dongwei;WANG Lei;ZHANG Cong;ZHAO Yixi(Shanghai Key Laboratory of Digital Manufacturing for Thin-Walled Structure,Shanghai Jiao Tong University,Shanghai 200240,China;SAIC Volkswagen Automotive Co.,Ltd.,Shanghai 201805,China)

机构地区：[1]上海交通大学上海市复杂薄板结构数字化制造重点实验室,上海200240 [2]上汽大众汽车有限公司,上海201805

出　　处：《上海交通大学学报》2019年第1期100-104,共5页Journal of Shanghai Jiaotong University

摘　　要：为探究包边过程的预折刀工作终止位置对包边边界缩进的影响规律,以某车型前门的包边过程为研究对象,基于AutoForm软件建立有限元模型,定义了预折刀相对进给量以量化表述预折刀工作终止位置,并在包边机上进行验证实验,在此基础上提出了包边边界缩进的调整流程.结果表明:随着预折刀相对进给量不断增加,包边边界缩进逐渐增大,但并非呈线性增长;当预折刀处于欠进给时,随着预折刀相对进给量的增加,包边边界缩进增量很小;当预折刀处于过进给时,利用2次函数可以拟合包边边界缩进与预折刀相对进给量的关系.In order to study the effect of pre-hem steel stopping position on boundary roll-in,the hemming process of a front door was analyzed and modeled based on AutoForm.Relative stroke was defined to quantify the pre-hem steel stopping position.The analysis result was also verified by the experiments on the hemming machine,and a method of adjusting boundary roll-in was proposed based on the numerical and experimental analysis.The investigation shows that the boundary roll-in increases with the increase of the relative stroke,but the increasing process is non-linear.When the pre-hem steel has under stroke,the influence of the relative stroke on the boundary roll-in is relatively small.While a quadratic function fits the relation between boundary roll-in and relative stroke well when the pre-hem steel has over stroke.

关 键 词：汽车板材 包边 边界缩进 预折刀 有限元分析 

分 类 号：TG386[金属学及工艺—金属压力加工]