微小通道薄壁扁管筋结构对波形冲压截面畸变的作用  

Effect of rib structure on cross-section distortion in waveform stamping formicro-channel thin-walled flat tube

作　　者：朱英霞[1] 陈炜[1] 李晖 郭渊[1] Zhu Yingxia;Chen Wei;Li Hui;Guo Yuan(School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《锻压技术》2023年第12期121-128,共8页Forging & Stamping Technology

基　　金：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)。

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N_(1)越小,越有利于降低截面畸变率;当N_(1)=0时,横筋个数N_(2)越大,越有利于降低畸变率;但当N_(1)≥1且数值固定时,N_(2)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,N_(1)=0,N_(2)=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 N_(1),the more conducive to reduce the cross-section distortion rate.When N_(1)=0,the bigger the number of transverse rib N_(2),the more conducive to reduce the distortion rate.However,when N_(1)≥1 and the value is fixed,the smaller N_(2),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,N_(1)=0,N_(2)=2,transverse rib width of 0.6 mm)is the smallest.

关 键 词：微小通道 波形扁管 截面畸变 筋结构 冲压 

分 类 号：TG386[金属学及工艺—金属压力加工]