| 引用本文: | 才宇航,高延峰,潘 皓,曾立雪,包俊阳.TC4 钛合金激光扫描焊接金属蒸气形态及其光谱特性研究(J/M/D/N,J:杂志，M：书，D：论文，N：报纸).期刊名称,2024，41（5）：87-96 |
| CHEN X. Adap tive slidingmode contr ol for discrete2ti me multi2inputmulti2 out put systems[ J ]. Aut omatica, 2006, 42(6): 4272-435 |
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| 摘要: |
| 目的 钛合金激光焊接时会产生大量等离子体 / 金属蒸气,等离子体 / 金属蒸气中包含了大量的焊接信息,通
过研究这些信息与焊接状态的关系,可以实现焊接状态的实时反馈与调整,为焊接自动化提供了基础。 方法 以
TC4 钛合金为实验对象,加入激光扫描焊接工艺方法;通过高速摄像与光谱采集的方式对焊接过程中的金属蒸汽
形态以及光谱变化规律进行了研究。 结果 试验结果表明:在点焊时加入扫描以后,等离子体 / 金属蒸气的摆动幅度
减小,小孔效应减弱,焊接的稳定性得以提高;在移动焊接时,在不加扫描时,激光功率的提升以及焊接速度的减慢
均会对使光谱强度得到显著的升高,而加入扫描以后,激光功率的提升以及焊接速度的减慢对光谱强度的影响变
得很小,光谱强度并没有显著提升。 结论 在点焊过程中扫描的加入会使等离子体摆动幅度减小,焊接的稳定性得
到提高。 在移动焊接过程中加入扫描,可以对光谱强度产生抑制,同样使得焊接的稳定性得以提高。 |
| 关键词: 激光焊接 TC4 钛合金 等离子体 高速摄像 光谱分析 |
| DOI： |
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| Study on the Morphology and Spectral Characteristics of Metal Vapour in TC4 Titanium Alloy Laser ScanningWelding |
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CAI Yuhang, GAO Yanfeng, PAN Hao, ZENG Lixue, BAO Junyang
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School of Mechanical and Automotive Engineering Shanghai University of Engineering Science Shanghai 201620 China
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| Abstract: |
| Objective A large amount of plasma / metal vapor is generated during the laser welding of titanium alloy. The
plasma / metal vapor contains a large amount of welding information. By studying the relationship between the information
and the welding state the real-time feedback and adjustment of the welding state can be realized which provides the basis
for welding automation. Methods Taking TC4 titanium alloy as the experimental object a laser scanning welding process
was added. The morphology and the rule of spectral variation of the metal vapor during the welding process were
investigated by means of high-speed camera and spectral acquisition. Results The experimental results showed that the
plasma / metal vapor swing amplitude decreased the keyhole effect weakened and the welding stability was improved after
the scanning was added during spot welding. In mobile welding without scanning the increase in laser power and the
slowing down of welding speed significantly increased the spectral intensity. However after the addition of scanning the
increase in laser power and the slowing down of welding speed had little influence on the spectral intensity and the
spectral intensity wasn?? t significantly improved. Conclusion The addition of scanning in spot welding can reduce the
swing amplitude of plasma and improve the stability of welding. When scanning is added to the process of mobile welding
the spectral intensity can be suppressed and the stability of welding can be improved. |
| Key words: laser welding TC4 titanium alloy plasma high-speed camera spectral analysis |
