10-kW-class YAG laser application for heavy components

Takashi Ishide; S. Tsubota; Michisuke Nayama; Yoshiaki Shimokusu; Tadashi Nagashima; K. Okimura

doi:10.1117/12.377063

7 February 2000 10-kW-class YAG laser application for heavy components

Takashi Ishide, S. Tsubota, Michisuke Nayama, Yoshiaki Shimokusu, Tadashi Nagashima, K. Okimura

Proceedings Volume 3888, High-Power Lasers in Manufacturing; (2000) https://doi.org/10.1117/12.377063
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan

Abstract

The authors have put the YAG laser of the kW class to practical use for repair welding of nuclear power plant steam generator heat exchanger tubes, all-position welding of pipings, etc. This paper describes following developed methods and systems of high power YAG laser processing. First, we apply the 6 kW to 10 kW YAG lasers for welding and cutting in heavy components. The beam guide systems we have used are optical fibers which core diameter is 0.6 mm to 0.8 mm and its length is 200 m as standard one. Using these system, we can get the 1 pass penetration of 15 mm to 20 mm and multi pass welding for more thick plates. Cutting of 100 mm thickness plate data also described for dismantling of nuclear power plants. In these systems we carried out the in-process monitoring by using CCD camera image processing and monitoring fiber which placed coaxial to the YAG optical lens system. In- process monitoring by the monitoring fiber, we measured the light intensity from welding area. Further, we have developed new hybrid welding with the TIG electrode at the center of lens for high power. The hybrid welding with TIG-YAG system aims lightening of welding groove allowances and welding of high quality. Through these techniques we have applied 7 kW class YAG laser for welding in the components of nuclear power plants.

Citation Download Citation

Takashi Ishide, S. Tsubota, Michisuke Nayama, Yoshiaki Shimokusu, Tadashi Nagashima, and K. Okimura "10-kW-class YAG laser application for heavy components", Proc. SPIE 3888, High-Power Lasers in Manufacturing, (7 February 2000); https://doi.org/10.1117/12.377063

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available