High-power COIL and Nd:YAG laser welding

Fumio Wani; T. Nakabayashi; A. Hayakawa; S. Suzuki; K. Yasuda

doi:10.1117/12.515829

10 November 2003 High-power COIL and Nd:YAG laser welding

Fumio Wani, T. Nakabayashi, A. Hayakawa, S. Suzuki, K. Yasuda

Proceedings Volume 5120, XIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; (2003) https://doi.org/10.1117/12.515829
Event: XIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 2002, Wroclow, Poland

Abstract

We have constructed a laser welding system, which enabled high-power laser welding by combining three laser beams of 1 µm wavelength. Its wavelength enables optical silica fibers transmission and the flexible system. The heart of this system consists of a 4 kW and a 6 kW Nd:YAG lasers and a 10 kW class Chemical Oxygen-Iodine Laser (COIL) beams of 6 kW Nd:YAG laser and COIL are combined in a coaxial beam and its maximum average power is 19 kW. The third laser beam, 4 kW Nd:YAG laser beam, is added obliquely from the same side of workpiece or oppositely from the reverse one. The effects of various welding parameters were investigated, such as the laser power, pulse modulation, and so on. As a result of the welding test with the 6 kW Nd:YAG laser, it was clarified that the pulse wave (PW) has good efficiency of deeper penetration at low welding speed. When the combined beam with CW COIL and PW Nd:YAG laser was used, 20 mm penetration on the stainless steel could be achieved at a welding speed of 1 m/min. By adding the third laser beam, the both side welding on 30mm thickness plate could be achieved.

Citation Download Citation

Fumio Wani, T. Nakabayashi, A. Hayakawa, S. Suzuki, and K. Yasuda "High-power COIL and Nd:YAG laser welding", Proc. SPIE 5120, XIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, (10 November 2003); https://doi.org/10.1117/12.515829

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KEYWORDS

Nd:YAG lasers

Chemical oxygen iodine lasers

Laser welding

Continuous wave operation

High power lasers

YAG lasers

Laser applications

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