Transactions of Materials and Heat Treatment

Title：NC bending process and significance analysis on structural parameters of TA18 medium strength titanium alloy tube

Authors： Liu Dahai Chen Jindong Li Bo Li Zhi Qiu Wenqing Guo Zhenghua

Unit： Nanchang Hangkong University

KeyWords： TA18 medium strength titanium alloy tube NC bending virtual orthogonal test significance analysis ABAQUS

ClassificationCode：TG386

year,vol(issue):pagenumber：2021,46(4):156-165

Abstract：

The finite element model of numerical control (NC) bending process for TA18 medium strength titanium alloy tube was established based on ABAQUS platform, and the reliability of the model was evaluated. Through virtual orthogonal test, the significance of influence for structure and process parameters on the NC bending process of TA18 medium strength titanium alloy tube was researched. The comprehensive researches from the four aspects of wall thinning ratio,cross section deformation ratio, wall thickening ratio and springback angle show that the influence degree of different factors on the bending of TA18 medium strength titanium alloy tube is as follow: relative bending radius, bending angle, mandrel protrusion length, clearance between mandrel and tube, bending speed, friction coefficient between mandrel and tube, and friction coefficient between block and tube. For the parameter level selected in this paper, under the structural parameters of relative bending radius r/d=3.0 and bending speed v=0.8 rad·s-1, as well as the process parameters of bending angle θ=90°, mandrel protrusion length e=3 mm, clearance between mandrel and tube δ=0.3 mm, friction coefficient between mandrel and tube f1=0.2 and friction coefficient between block and tube f2=0.2, the quality of NC bending for TA18 medium strength titanium alloy tube is the best.

Funds：

江西省重点研发计划项目（20202BBEL53011）；江西省重大科技研发专项项目（20194ABC28001）

刘大海（1981-），男，博士，副教授 E-mail：liudahai.hit@gmail.com 通讯作者：陈劲东（1996-），男，硕士研究生 E-mail:15079906265@163.com

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