Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Shigeki Fujinaga"'
Publikováno v:
Welding International. 19:441-446
Construction of electric power generating stations and chemical plants routinely involves the provision of large numbers of fixed welded pipelines. Conventional arc welding, while only achieving a slow welding speed, specifically requires welds to be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba7f4a6f1675758f95eace9b1f04a07b
https://doi.org/10.1533/wint.2005.3440
https://doi.org/10.1533/wint.2005.3440
Publikováno v:
Welding International. 18:16-23
A feasibility of combined heat sources, which provide wide heat source distribution, was investigated to improve the weldability of a square butt-joint with a wide gap. Two welding methods were examined in this study : one was welding with twin YAG l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::35065c54334d5b53bea0854d110a87a4
https://doi.org/10.1533/wint.2004.3206
https://doi.org/10.1533/wint.2004.3206
Publikováno v:
QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY. 22:369-374
In the construction sites of chemical and electric power plants etc., many pipes are welded with conventional MIG/TIG arc welding methods in these days. Nevertheless, much time should be necessary to weld thick pipes with these welding methods becaus
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5fd24def830009ebf5cc12ecf61a15db
https://doi.org/10.2207/qjjws.22.369
https://doi.org/10.2207/qjjws.22.369
Publikováno v:
Science and Technology of Welding and Joining. 5:113-119
Two Nd–YAG laser beams were combined at a certain point on the workpiece surface to increase weld penetration depth. One of the beams was a pulsed laser beam, and the other was a continuous wave laser beam or a modulated laser beam. Using this comb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::72faf3a95237778cf50f19545745691f
https://doi.org/10.1179/136217100101538100
https://doi.org/10.1179/136217100101538100
Publikováno v:
Journal of Physics D: Applied Physics. 33:492-497
When a high-power laser beam is irradiated on the surface of material, it is well known that a cavity, called a keyhole, is generated in the molten material. To examine the effect of laser beam pulse shape on the keyhole behaviour, we observed it dir
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a346b674779889d17be982683f4db08
https://doi.org/10.1088/0022-3727/33/5/304
https://doi.org/10.1088/0022-3727/33/5/304
Publikováno v:
The Review of Laser Engineering. 28:45-49
In laser welding, power density is very high at the processing points and a cavity called a keyhole is generated by the recoil pressure of evaporation. The authors examined keyhole and plasma/plume behavior using a microfocused X-ray transmission in-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b1cad72c65fb00aa0474e0259b23853
https://doi.org/10.2184/lsj.28.45
https://doi.org/10.2184/lsj.28.45
Autor:
Katsunori Inoue, Hiroo Takenaka, Toru Narikiyo, Hiroshi Miura, Shigeki Fujinaga, Akira Ohmori
Publikováno v:
Welding International. 14:191-202
Two multi-kilowatts Nd: YAG laser beams are condensed separately and combined at surface of workpiece in order to increase penetration depth. In this system, one or two laser beams are inevitably inclined depending on size of condensing optics, thus,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c3574c68fa6c20e7a80b2897741afe72
https://doi.org/10.1080/09507110009549164
https://doi.org/10.1080/09507110009549164
Publikováno v:
Science and Technology of Welding and Joining. 4:373-380
An Nd–YAG laser processing system has been developed in which the beams of three Nd–YAG lasers (two 2·0 kW continuous wave oscillators and one 1·5 kW pulsed oscillator) were combined at the input end of a single optical fibre and transmitted th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ecf37f46ad30c64a0b617548ef6d0969
https://doi.org/10.1179/136217199101538021
https://doi.org/10.1179/136217199101538021
Publikováno v:
Science and Technology of Welding and Joining. 4:302-307
A pair of Nd–YAG laser beams transmitted through optical fibres from two oscillators have been condensed separately and combined at a single point on the workpiece in order to enhance welding ability. Bead on plate tests were carried out with symme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a3cd3205da9b5a389e5c53968829e29f
https://doi.org/10.1179/136217199101537914
https://doi.org/10.1179/136217199101537914
Publikováno v:
Journal of Laser Applications. 11:91-95
Nd:YAG laser oscillators of two different types were used simultaneously in order to enhance welding ability. A pulse beam emitted from a pulse pumped oscillator was irradiated onto stainless steel (304) together with a rectangularly modulated pulse
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7181473d11b47851fd494149c8991d27
https://doi.org/10.2351/1.521884
https://doi.org/10.2351/1.521884