摘要
基于ABAQUS/Explicit,建立了0Cr21Ni6Mn9N(21-6-9)不锈钢管材数控弯曲成形的三维弹塑性有限元模型,模拟分析了管模间隙对管材弯曲成形截面质量的影响规律。结果表明:壁厚减薄和截面畸变程度在中间部位严重,在弯曲平面和初始弯曲平面附近较小;随着芯棒与管材间隙的增大,壁厚减薄率减小,截面畸变程度先减小后增大;随着弯曲模与管材间隙的增大,壁厚减薄率和截面畸变程度增大;随着防皱块与管材间隙的增大,壁厚减薄率和截面畸变程度先减小后基本不变;压块与管材间隙对弯管截面质量的影响不显著。
Based on the platform of ABAQUS/Explicit, a 3D elastic - plastic finite element model of NC bending process of 0Cr21Ni6Mn9N （21 -6 -9） stainless steel tube was established. Then, simulation and analysis of the processes were carried out, and the influence laws of clearances among tube and dies on the cross section quality were obtained. The results show that the wall thinning and cross section deformation are serious at the middle part and small in the vicinity of bending plane or initial bending plane. The wall thinning rate decreases, and the cross section deformation degree decreases firstly and then increases with the increase of clearance be- tween mandrel and tube. The wall thinning rate and the cross section deformation degree increase with the increase of clearance between bending die and tube. The wall thinning rate and the cross section deformation degree decrease firstly, and then hardly remain unchanged with the increase of clearance between wiper die and tube. The cross section quality changes a little with the increase of clearance between pressure die and tube.
出处
《锻压技术》
CAS
CSCD
北大核心
2014年第5期132-137,共6页
Forging & Stamping Technology
基金
国家自然科学基金资助项目(51164030)
