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Proceedings Paper

Development of new type of nozzle for high-power Nd:YAG laser welding
Author(s): Mitsuaki Yoshikawa; Takashi Kurosawa; Yasuo Tanno
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Paper 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.

Paper Details

Date Published: 7 February 2000
PDF: 11 pages
Proc. SPIE 3888, High-Power Lasers in Manufacturing, (7 February 2000); doi: 10.1117/12.377061
Show Author Affiliations
Mitsuaki Yoshikawa, Sumitomo Heavy Industries, Ltd. (Japan)
Takashi Kurosawa, Sumitomo Heavy Industries, Ltd. (Japan)
Yasuo Tanno, Sumitomo Heavy Industries, Ltd. (Japan)

Published in SPIE Proceedings Vol. 3888:
High-Power Lasers in Manufacturing
Xiangli Chen; Tomoo Fujioka; Akira Matsunawa, Editor(s)

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