间隙对TA18高强钛管数控弯曲成形截面畸变及壁厚变化的影响

发布时间：2018-03-18 12:30

本文选题：TA高强钛管　切入点：间隙　出处：《塑性工程学报》2017年06期 　论文类型：期刊论文

【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。
[Abstract]:Based on ABAQUS/Explicit platform, the 3D finite element model of TA18 high-strength titanium tube NC bending process is established, and the reliability of the model is verified. The influence of the gap between die and pipe on the cross-section distortion and wall thickness of TA18 high-strength titanium tube is simulated and analyzed by using this model. The results show that the gap between mandrel and pipe is reduced. The gap of bending die / pipe and the gap of press block / pipe can reduce the degree of section distortion, and the gap of press die / pipe or increase the clearance of mandrel / tube can reduce the thickness of wall thickness. By increasing the clearance of bending die / pipe, the clearance of mandrel / pipe and the gap of pressing block / pipe can reduce the thickening rate of wall thickness. The clearance of wrinkle block / pipe has little effect on the variation of cross section distortion and wall thickness. The better clearance value of mandrel / pipe, the clearance value of bending die / pipe, the gap value of press block / pipe and the clearance value of wrinkle block / pipe are obtained. It is 0. 075, 0. 1, 0. 1 and 0. 1 mm. respectively.
【作者单位】：南昌航空大学轻合金加工科学与技术国防重点学科实验室;江西科技师范大学材料与机电学院;
【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)
【分类号】：TG306

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