摘要
基于ABAQUS/Explicit平台,建立了TA18高强钛管数控弯曲成形过程三维有限元模型,并验证了模型的可靠性;采用该模型模拟分析了模具与管材之间的间隙对TA18高强钛管数控弯曲成形截面畸变和壁厚变化的影响规律。结果表明:减小芯棒/管材的间隙、弯曲模/管材的间隙和压块/管材的间隙可以降低截面畸变程度;减小弯曲模/管材的间隙、压块/管材的间隙或增加芯棒/管材的间隙可以减小壁厚减薄率;增大弯曲模/管材的间隙、芯棒/管材的间隙和压块/管材的间隙可以降低壁厚增厚率;防皱块/管材的间隙对截面畸变和壁厚变化影响不大。获得了较佳的芯棒/管材的间隙值、弯曲模/管材的间隙值、压块/管材的间隙值和防皱块/管材的间隙值,分别为0.075、0.1、0.1和0.1 mm。
Based on ABAQUS/Explicit platform,a three dimensional finite element（ FE） model of TA18 high strength titanium tube in NC bending was established,and its reliability was verified; the influence laws of different clearance between the die and tube on cross section deformation and wall thickness variation were analyzed by the FE model. The results show that reducing the clearance of mandrel/tube,bending die/tube and pressure die/tube can reduce section deformation degree; reducing the clearance of bending die/tube,pressure die/tube or increasing the clearance of mandrel/tube can lower the wall thickness thinning ratio; increasing the clearance of bending die/tube,mandrel/tube and pressure die/tube can reduce the wall thickening ratio; the clearance of wiper die/tube has little significance on cross section deformation and wall thickness variation. The optimal clearance values of the mandrel/tube,bending die/tube,pressure die/tube and wiper die/tube are 0. 075,0. 1,0. 1 and 0. 1 mm,respectively.
出处
《塑性工程学报》
CAS
CSCD
北大核心
2017年第6期87-93,共7页
Journal of Plasticity Engineering
基金
江西省教育厅科学技术研究项目(GJJ150810)
轻合金加工科学与技术国防重点学科实验室开放课题研究基金项目(gf201501001)
江西科技师范大学博士科研启动基金项目(BSJJ2015015)
关键词
TA18高强钛管
间隙
截面畸变
壁厚变化
数控弯曲
有限元模拟
TA18 high strength titanium tube
clearance
cross section deformation
wall thickness variation
NC bending
finite element simulation
