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为揭示TA16钛管数控绕弯成形机理，实现精确成形和回弹控制，基于ABAQUS/Explicit有限元平台建立了TA16钛管数控绕弯全过程弹塑性有限元模型，系统研究了芯棒伸出量和相对弯曲半径对管材回弹与截面畸变的影响，并通过实验验证了模型的可靠性。结果表明：随着相对弯曲半径的减小，管材截面畸变率和壁厚减薄率显著增大，当R/D<3时，截面畸变率超过工程允许的9%;芯棒伸出量对成形质量呈现非线性影响，在研究范围内截面畸变率从11.28%单调减小至9.82%,外侧壁厚减薄率从12.87%增至14.77%,而内侧壁厚增厚率变化较小；芯棒伸出量的增大使回弹角和回弹半径均减小，其中回弹半径的减小幅度更为显著；建立了回弹角与弯曲角度的线性关系模型，为TA16钛管实际生产中的回弹补偿提供了理论指导和工艺参考。
Abstract：To reveal the forming mechanism of TA16 titanium tube in CNC rotary draw bending forming, and to achieve precise forming and springback control, an elasto-plastic finite element model of the entire CNC rotary draw bending process for TA16 titanium tube was established based on the ABAQUS/Explicit finite element platform. The effects of mandrel extension and relative bending radius on tube springback and cross-sectional distortion were systematically investigated, and the reliability of the model was verified through experiments. The results show that as the relative bending radius decreases, the cross-sectional distortion rate and wall thickness reduction rate of the tube increase significantly. When R/D<3, the cross-sectional distortion rate exceeds the engineering allowable limit of 9%. The mandrel extension has a nonlinear impact on forming quality. Within the studied range, the cross-sectional distortion rate decreases monotonically from 11.28% to 9.82%, while the outer wall thickness reduction rate increases from 12.87% to 14.77%, with a smaller change in the inner wall thickness increase rate. The increase of mandrel extension reduces both the springback angle and springback radius, with a more significant reduction in the springback radius. A linear relationship model between the springback angle and bending angle is established, providing theoretical guidance and process reference for springback compensation in the actual production of TA16 titanium tube.
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基本信息:
中图分类号:TG306
引用信息:
[1]代奕聪,王辉,杨秋成,等.TA16数控绕弯成形回弹与截面畸变规律研究[J].塑性工程学报,2026,33(07):20-30.
基金信息:
国家重点研发计划(2024YFB3713402)
2026-07-20
2026-07-20
2026-07-20