Development of new type of nozzle for high-power Nd:YAG laser welding

Mitsuaki Yoshikawa; Takashi Kurosawa; Yasuo Tanno

doi:10.1117/12.377061

7 February 2000 Development of new type of nozzle for high-power Nd:YAG laser welding

Mitsuaki Yoshikawa, Takashi Kurosawa, Yasuo Tanno

Proceedings Volume 3888, High-Power Lasers in Manufacturing; (2000) https://doi.org/10.1117/12.377061
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan

Abstract

We have been engaged in research and development concerning high power Nd:YAG laser equipment and overall application technology for welding, cutting and drilling. Especially, development of the technology and the system are required for to establish stable welding process. Higher the laser power used, the more laser beam interacted with material, leading to increased vapor, plume and spatter ejection from molten metal. They contaminate and damage the optical systems that are constructed by lens and cover glass plate. In general, in order to protect the optical system, shielding gas flow rate is controlled. But if the gas flow rate exceeds the proper value, molten metal does not protect from oxidation. Therefore we developed a new type co-axial nozzle device. We welded various material (mild steel, stainless steel and aluminum alloy) using new type nozzle and 4 kW YAG laser (MW4000). As the results of experiment, it was cleared that we can weld, within the speed range from 25 mm/min to 2 m/min, stably and easily.

Citation Download Citation

Mitsuaki Yoshikawa, Takashi Kurosawa, and Yasuo Tanno "Development of new type of nozzle for high-power Nd:YAG laser welding", Proc. SPIE 3888, High-Power Lasers in Manufacturing, (7 February 2000); https://doi.org/10.1117/12.377061

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