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预折刀工作终止位置对包边边界缩进的影响

本站小编 Free考研考试/2022-02-12

李东玮1,王磊2,张聪2,赵亦希1
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
出版日期:2019-01-28发布日期:2019-01-28
通讯作者:赵亦希,女,博士,副教授,电话(Tel.):021-34206304;E-mail: yxzhao@sjtu.edu.cn.
作者简介:李东玮(1993-),男,山西省大同市人,硕士生,主要研究方向为薄板成形与汽车包边工艺.


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

LI Dongwei,WANG Lei,ZHANG Cong,ZHAO Yixi
1. Shanghai Key Laboratory of Digital Manufacturing for Thin-Walled Structure, Shanghai Jiao Tong University, Shanghai 200240, China;2. SAIC Volkswagen Automotive Co., Ltd., Shanghai 201805, China
Online:2019-01-28Published:2019-01-28







摘要/Abstract


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.
关键词: 汽车板材, 包边, 边界缩进, 预折刀, 有限元分析
Abstract: 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.
Key words: automobile sheet, hemming, boundary roll-in, pre-hem steel, finite element analysis


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