锻压技术

微小通道薄壁扁管筋结构对波形冲压截面畸变的作用

英文标题：Effect of rib structure on cross-section distortion in waveform stamping for micro-channel thin-walled flat tube

作者：朱英霞陈炜李晖郭渊

单位：江苏大学机械工程学院

分类号：TG386

出版年,卷(期):页码：2023,48(12):121-128

摘要：

为了优化微小通道波形扁管的截面筋结构及尺寸，采用有限元仿真研究了15种尺寸-样式模型下的冲压成形截面畸变规律，获得了抵抗截面畸变的最优结构样式。研究发现：随着纵筋高度增大，波峰横截面的平均截面畸变率先增大后减小；随着横筋宽度增大，波峰横截面和边缘孔纵截面的平均截面畸变率减小；当纵筋、横筋分别连通横截面时，截面畸变率最小。较之横筋，截面畸变率对纵筋的敏感度更高，纵筋个数N1越小，越有利于降低截面畸变率；当N1=0时，横筋个数N2越大，越有利于降低畸变率；但当N1≥1且数值固定时，N2越小，越有利于降低畸变率。15种尺寸-样式模型中，模型IV-1（h=0,N1=0，N2=2，横筋宽度为0.6 mm）对应的截面畸变率最小。

In order to optimize the structure and size of cross-section rib for micro-channel corrugated flat tube, the cross-section distortion rules under fifteen size-type models during the stamping process were studied by the finite element simulation, and the optimal structural style to resist the cross-section distortion was obtained. It is found that the average cross-section distortion rate of wave crest cross-section first increases and then decreases with the increasing of longitudinal rib height, and with the increasing of transverse rib width, the average cross-section distortion rate of wave crest cross-section and edge hole longitudinal cross-section decreases. When the longitudinal and transverse ribs are connected to the cross-section respectively, the cross-section distortion rate is minimum. Compared with the transverse rib, the cross-section distortion rate is more sensitive to the longitudinal rib. The smaller the number of longitudinal rib N1, the more conducive to reduce the cross-section distortion rate. When N1=0, the bigger the number of transverse rib N2, the more conducive to reduce the distortion rate. However, when N1≥1 and the value is fixed, the smaller N2, the more conducive to reduce the distortion rate. Among the fifteen size-style models, the corresponding cross-section distortion rate of model IV-1(h=0,N1=0, N2=2, transverse rib width of 0.6 mm) is the smallest.

基金项目：

国家自然科学基金资助项目（51601070， 51875263）；广东省精密装备与制造技术重点实验室开放项目（PEMT202102）；江苏大学企业单位委托科技项目（HX20220700）

作者简介：朱英霞（1986-），女，博士，副教授 E-mail：xia166109@163.com 通信作者：陈炜（1965-），男，博士，教授 E-mail：chen_wei@mail.ujs.edu.cn

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