Avoiding the formation of pores during laser welding of copper hairpins by dynamic beam shaping

被引：1

作者：

Reinheimer, Eveline Nicole ^{[1
]}

Haas, Michael ^{[1
]}

Zaiss, Felix ^{[1
]}

Omlor, Markus ^{[2
]}

Spurk, Christoph ^{[3
]}

Olowinsky, Alexander ^{[4
]}

Beckmann, Felix ^{[5
]}

Moosmann, Julian ^{[5
]}

Hagenlocher, Christian ^{[1
]}

Weber, Rudolf ^{[1
]}

Graf, Thomas ^{[1
]}

机构：

[1] Univ Stuttgart, IFSW, Pfaffenwaldring 43, D-70569 Stuttgart, Germany

[2] Dr Ing HcF Porsche AG, Porschepl 1, D-70435 Stuttgart, Germany

[3] Rhein Westfal TH Aachen, Lehrstuhl Lasertechn, Steinbachstr 15, D-52074 Aachen, Germany

[4] Fraunhofer Inst Lasertechn ILT, Steinbachstr 15, D-52074 Aachen, Germany

[5] Helmholtz Zentrum Hereon, Notkestr 85, D-22607 Hamburg, Germany

来源：

INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY | 2025年 / 137卷 / 5-6期

关键词：

Laser beam welding; Copper welding; Pore formation; Coherent beam combination;

D O I：

10.1007/s00170-025-15236-0

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Any pores formed during laser welding of copper hairpins affect the structural integrity and the mechanical/electrical functionality of the joint. We report on investigations using synchrotron X-ray imaging techniques to observe the formation of the pores in the processing zone while welding. It was found that all pores are formed at the joint gap and that the small pores are distributed throughout the complete joint volume as a result of the melt flow induced by the movement of the laser beam. This insight has led to the development of a welding strategy that minimizes pore formation by avoiding the movement of the laser beam across the joint gap. This was achieved by rapid beam shaping based on coherent beam combining (CBC) technology.

引用

页码：2257 / 2266

页数：10

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