Optimized Design of Laser Welding Process for Ultra-Thin TA1 Thermal Insulation Cup with Narrow Gaps

WANG Zhijie; JU Zhenjiang; ZHAO Hong; SHI Xingfu; WU Linjun; WANG Zeyu

doi:10.7512/j.issn.1001-2303.2025.05.08

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Optimized Design of Laser Welding Process for Ultra-Thin TA1 Thermal Insulation Cup with Narrow Gaps
Vol. 55, Issue 5, Pages: 63-68(2025)
Received：12 December 2024，

Revised：2025-01-13，

Published：20 May 2025
DOI： 10.7512/j.issn.1001-2303.2025.05.08
稿件说明：

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王志杰，琚震江，赵洪，等.TA1保温杯超薄板窄间距激光焊接工艺优化［J］.电焊机，2025，55（5）：63-68. DOI： 10.7512/j.issn.1001-2303.2025.05.08.

WANG Zhijie, JU Zhenjiang, ZHAO Hong, et al.Optimized Design of Laser Welding Process for Ultra-Thin TA1 Thermal Insulation Cup with Narrow Gaps[J].Electric Welding Machine, 2025, 55(5): 63-68. DOI： 10.7512/j.issn.1001-2303.2025.05.08.

摘要

为实现超薄、窄间距TA1保温杯板材的精密连接，设计搭建了一种基于旋转定位系统的激光焊接装置，并进行了焊接试验，分析激光焊接功率及焊接速度等工艺参数对焊接接头组织、显微硬度、力学性能的影响规律。研究发现，激光功率和旋转定位台转速对焊接质量有显著影响。当激光功率过低（600 W）或旋转定位台转速过快（11~13 r/min）时，焊接热输入低，熔池流动性差，导致组织分布不均且熔深浅；而激光功率过高（1 200~1 350 W）或转速过慢（3~5 r/min）时，热输入过高，接头变形大、热影响区宽且易产生气孔缺陷。通过对不同工艺参数下的焊接接头进行体式显微分析、金相观察和拉脱力测试，发现当激光功率为 1 050 W、旋转定位台转速为 7 r/min 时，接头成形良好，内胆和外壁对结构称，无气孔缺陷，且接头非标试样的平均拉脱力和最小拉脱力分别达到峰值 1 415 N、1343 N。试验结果证明，优化后的焊接工艺显著提升了纯钛焊接的精度和质量，可以为高纯钛保温杯的高效高品质制造提供理论依据和参考。

Abstract

To achieve precise connections of ultra-thin

narrow-spaced TA1 thermal insulation cup plates

this study designed and built a laser welding device based on a rotary positioner system

and carried out welding experiments to analyze the effects of process parameters such as laser welding power and welding speed on the microstructure

microhardness

and mechanical properties of welded joints.

Results

indicate that laser power and rotary positioner speed significantly impact welding quality. At low laser power (600 W) or high rotary positioner speed (11~13 r/min)

low welding heat input reduces molten pool fluidity

causing uneven microstructure distribution and shallow penetration. Conversely

high laser power (1 200~1 350 W) or low rotary positioner speed (3~5 r/min) increases heat input

leading to significant joint deformation

a wide heat-affected zone

and porosity defects. Comprehensive analysis of welded joints under different parameters via stereoscopic microscopy

metallographic examination

and pull-off force tests reveals optimal parameters: a laser power of 1 050 W and a rotary positioner speed of 7 r/min. Under these conditions

the joint forms well

with symmetrical inner and outer wall structures

no porosity defects

and peak average and minimum pull-off forces of 1 415 N and 1 343 N

respectively. The optimized process significantly enhances the accuracy and quality of titanium welding

offering a theoretical basis and reference for the efficient

high-quality manufacturing of pure titanium thermal insulation cups.

关键词

Keywords

references

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