Laser-assisted Spinning Forming Laws of Ti/Al Bimetallic Thin-walled Parts

doi:10.3969/j.issn.1004-132X.2025.10.028

Abstract

Abstract:

To address the poor geometric accuracy and mechanics performance of Ti/Al bimetallic thin-walled conical parts formed at room temperature， a laser-assisted shear spinning process was proposed to enhance their performance. The temperature field at the deformation fronts was analyzed， and a time-varying model of laser power demand was established. Theoretical analysis demonstrated that stable control of the temperature field might be achieved by regulating the laser power growth curve. A finite element model was developed to investigate deformation behaviors and physical field distributions through simulation results. Experimental validation of the process was conducted. Findings indicate that during laser-assisted shear spinning， the stress transfer and strain distribution between the Ti and Al layers enhance interlayer coordinated deformation capability， resulting in favorable combinations of strength and plasticity in the formed parts. Compared with conventional room-temperature shear spinning and thermal spinning without laser heating， the laser-assisted approach significantly improves die-conforming accuracy and deformation uniformity of Ti/Al bimetallic parts， thereby optimizing their overall mechanics properties.

Key words: Ti/Al bimetallic, thin-walled part, laser assistance, spinning forming

摘要：

针对Ti/Al双金属薄壁锥形件室温成形几何精度和力学性能较差的问题，提出使用激光辅助剪切旋压成形的方法来改善工件性能。对变形前沿的温度场进行分析，建立了激光功率需求随时间的变化模型。理论分析表明，通过控制激光功率增长曲线可以实现温度场的稳定控制。基于此建立了有限元模型，通过模拟结果研究了变形规律和物理场分布规律，并在旋压实验中对工艺进行了验证。研究结果表明，激光辅助剪切旋压时，Ti层和Al层在变形过程中的应力传递和应变分配提高了不同层间的协调变形能力，使成形件获得了良好的强度和塑性组合。与室温剪切旋压和不施加激光热源的热旋工艺相比，激光辅助剪切旋压可以显著提高Ti/Al双金属薄壁锥形件的贴模度和变形均匀性，改善整体的力学性能。

关键词: Ti/Al双金属, 薄壁件, 激光辅助, 旋压成形

CLC Number:

TG306

Zulong TAN, Jinchuan LONG, Junsong JIN, Xinyun WANG, Lei DENG, Xuefeng TANG, Fangtao CHAI. Laser-assisted Spinning Forming Laws of Ti/Al Bimetallic Thin-walled Parts[J]. China Mechanical Engineering, 2025, 36(10): 2389-2396.

谭祖龙, 龙锦川, 金俊松, 王新云, 邓磊, 唐学峰, 柴芳涛. Ti/Al双金属薄壁件激光辅助旋压成形规律[J]. 中国机械工程, 2025, 36(10): 2389-2396.

Figures/Tables 13

Fig.1 The relative motion trajectory of particles and the actual heating range of laser

Fig.2 Principle and assembly diagram

Tab. 1 Mechanical properties parameters of TA1 and 1060Al

材料	密度/（g·cm^-3）	弹性模量/GPa	泊松比
TA1	4.499	110	0.37
1060Al	2.705	66.7	0.33

Fig. 3 Equivalent stress-strain curves

Fig.4 Laser power changing with time， laser and roller motion trajectory

Fig.5 Spinning equipment and device

Fig.6 Measurement and calculation method of die-off clearance and roundness

Fig.7 Sampling position and size of tensile specimen for thin-walled conical parts

Fig.8 Temperature field distribution and distribution of stress triaxiality

Fig.9 Equivalent stress and equivalent plastic strain

Fig.10 Temperature variation curve of deformation zone in laser assisted shear spinning experiment

Fig.11 Comparison of shear spinning at room temperature and laser-assisted shear spinning at 350 °C

Fig.12 Comparison of laser assisted shear spinning at 350 °C and laser assisted shear spinning at 350 °C

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