New proposal for the solution of thick-plate lap joint problem

Naoaki Fukuda; Akikazu Kitagawa; Yasuo Takahashi; Akira Ohmori; Katsunori Inoue

doi:10.1117/12.497721

3 March 2003 New proposal for the solution of thick plates lap joint problem

Naoaki Fukuda, Akikazu Kitagawa, Yasuo Takahashi, Akira Ohmori, Katsunori Inoue

Proceedings Volume 4831, First International Symposium on High-Power Laser Macroprocessing; (2003) https://doi.org/10.1117/12.497721
Event: LAMP 2002: International Congress on Laser Advanced Materials Processing, 2002, Osaka, Japan

Abstract

The strength of laser welding with lap joints depends on its welding length and width of bead at plates interface. Therefore, the narrow bead width of laser lap welding joints at plates interface forces to apply multi-times welding to get required strength. The goal of this paper is to increase interface bead width on thick plate laser lap welding. The authors turn their attention to the penetration shapes of high power CO₂ laser welding for achieve that. It is well known that penetration shapes are like a wine cup in the case of deep penetration welding using high power CO₂ laser. The penetration shape of the wine cup is suggested that a large amount of laser power is absorbed at the surface of the test pieces. Then, the authors have studied how to change the heat source distribution on laser lap welding, and have succeeded to increase the bead width at the interface by a new developed process.

Citation Download Citation

Naoaki Fukuda, Akikazu Kitagawa, Yasuo Takahashi, Akira Ohmori, and Katsunori Inoue "New proposal for the solution of thick plates lap joint problem", Proc. SPIE 4831, First International Symposium on High-Power Laser Macroprocessing, (3 March 2003); https://doi.org/10.1117/12.497721

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