摘要
根据管材弯曲成形规律,设计了偏心TRB管,建立了偏心TRB管有芯弯曲模型,研究了偏心TRB管弯曲成形规律以及弯曲角度和弯曲半径对其弯曲成形质量的影响。结果表明,相比等厚弯管,偏心TRB管外凸侧管壁减薄率更低,适合于对弯管成形精度要求不高但是对成形性能要求较高的应用场景;弯曲角度对偏心TRB管成形质量影响不明显,增大弯曲半径有利于提高偏心TRB管的成形质量,但是随弯曲半径增大,减缓管壁起皱的效果逐渐减小;利用偏心TRB管稳定变形区壁厚预测公式计算得到的外凸侧壁厚值误差均低于5%,考虑到失稳起皱的影响,对公式调整后得到的内凹侧壁厚值误差为6%~7%。
According to the bending forming law of tube,the decentered tailor rolled blank(TRB)tube was designed.The bending model with mandrel of decentered TRB tube was established to study the bending forming law of decentered TRB tube and the influence of bending angle and bending radius on its bending forming quality.The results show that the thickness reduction of the convex side of decentered TRB tube is lower than that of equal-thickness bending tube,which is suitable for the application sceneries where the requirement for forming accuracy is not high but the requirement for forming performance is high.The effect of bending angle on forming quality of decentered TRB tube is not obvious.Increasing the bending radius is conducive to improve the forming quality of decentered TRB tube,but with the increase of bending radius,the effect of reducing tube wall wrinkle gradually decreases.The wall thickness error of the convex side calculated by the wall thickness prediction formula of decentered TRB tube stable deformation area is less than 5%.Considering the influence of instablility wrinkle,the wall thickness error of the concave side calculated by the adjusted formula is6%-7%.
作者
张渝
张遥
郭耀璘
张德军
ZHANG Yu;ZHANG Yao;GUO Yao-lin;ZHANG De-jun(School of Mechanotronics&Vehicle Engineering,Chongqing Jiaotong University,Chongqing 400074,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2021年第3期67-76,共10页
Journal of Plasticity Engineering
基金
重庆市科委自然科学基金资助项目(cstc2012jjA70001)。
关键词
偏心TRB管
弯曲成形
失稳起皱
稳定变形区
decentered TRB tube
bending forming
instability wrinkle
stable deformation area
