Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Hiroo Takenaka"'
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
Autor:
Toru NARIKIYO, Hiroshi MIURA, Shigeki FUJINAGA, Hiroo TAKENAKA, Akira OHMORI, Katsunori INOUE
Publikováno v:
QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY. 17:364-374
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0c41d1eec1d2a769f899608efa6ad9c6
https://doi.org/10.2207/qjjws.17.364
https://doi.org/10.2207/qjjws.17.364
Autor:
Hiroshi Miura, Toru Narikiyo, Hiroo Takenaka, Katsunori Inoue, Shigeki Fujinaga, Akira Ohmori
Publikováno v:
QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY. 17:209-215
Two Nd:YAG laser beams were condensed separately and combined at surface of workpiece in order to increase weld penetration depth. Welding characteristics were evaluated by penetration depth and penetration shape in bead-on-plate tests. Transition fr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3b49ab5dfc38fea6c38f6d1f77154ee2
https://doi.org/10.2207/qjjws.17.209
https://doi.org/10.2207/qjjws.17.209
Publikováno v:
The Review of Laser Engineering. 21:399-408
In the experiments using incident optics which have been developed for launching high power YAG laser light into a fiber, the entrance portion of the fiber is overheated under some experimental conditions. In order to analize this overheat phenomena
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c196079fe06123cda9508956af955a6f
https://doi.org/10.2184/lsj.21.3_399
https://doi.org/10.2184/lsj.21.3_399
Publikováno v:
International Congress on Applications of Lasers & Electro-Optics.
The keyhole behavior in flat, downward vertical, upward vertical and overhead welding was observed with X-ray transmission imaging system. The laser beam, where the pulsed beam of 2 ms width was superimposed to the modulated rectangular beam of 100 H
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d9145deb488fd43a91e466eb3d6bb7dc
https://doi.org/10.2351/1.5059247
https://doi.org/10.2351/1.5059247
Publikováno v:
Laser in der Technik / Laser in Engineering ISBN: 9783540552475
Fiber delivery of CW-pumped, high power Nd:YAG laser is attractive for three-dimensional, flexible material processing. Maximum average output power exceeding 2kW has been obtained for CW-pumped Nd:YAG lasers. Some of the advantageous features of CW-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b1ae2257ca47bc9089b8ff6ab802a33b
https://doi.org/10.1007/978-3-642-84736-3_79
https://doi.org/10.1007/978-3-642-84736-3_79
Autor:
Takatomo Sasaki, Yoshiaki Kato, Tadashi Kanabe, Hiroo Takenaka, Masahiro Nakatsuka, Koichiro Tsushima, Kunihiko Washio, Shogo Yoshikawa, Shunji Kishida
Publikováno v:
The Review of Laser Engineering. 9:157-168
Performances of amplifiers, optical isolators and power supply system which constitute GEKKO XII Module high power glass laser system are described. GEKKO XII Module was developed during 1977-1979 and its remarkable laser characteristics were already
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cccf343de7b146362b5f3c4ba0511952
https://doi.org/10.2184/lsj.9.157
https://doi.org/10.2184/lsj.9.157
Publikováno v:
International Congress on Applications of Lasers & Electro-Optics.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d1b62d1625193f4c309ba1aca6e92d9
https://doi.org/10.2351/1.5058327
https://doi.org/10.2351/1.5058327