Patents by Inventor Yasuyuki Fujiya

Yasuyuki Fujiya has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10343235
    Abstract: A laser welding method of the present invention is a laser welding method for irradiating with a laser beam a groove portion 6 formed along a circumferential direction by butting axial end portions of cylindrical bodies 5a, 5b together to weld the groove portion, the method comprising: a welding process S2 of irradiating the groove portion 6 with the laser beam over the entire circumference to weld the groove portion; and a strain correction process S4 of irradiating the groove portion 6 with the laser beam over the entire circumference, the laser beam having a heat input amount smaller than a heat input amount per unit area of the laser beam emitted in the welding process S2.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: July 9, 2019
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Keisuke Kamitani, Shuho Tsubota, Takafumi Aoyama, Yasuyuki Fujiya
  • Publication number: 20190160576
    Abstract: Provided is a method for bonding dissimilar metals to each other, the method comprising: dissimilar metal layer-forming steps (P2), (P3), (P4) for supplying, to form dissimilar metal layers; a second metal layer-forming step (P5) for supplying, on the surface of the dissimilar metal layers, a filler material formed of a second metal, and heating the filler material formed of the second metal to a temperature equal to or higher than a melting point of the second metal, to form a second metal layer formed of the second metal; and a second material-to-be-bonded welding step (P6) for welding a second material to be bonded that is formed of the second metal, onto the second metal layer.
    Type: Application
    Filed: October 12, 2017
    Publication date: May 30, 2019
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Yasuyuki FUJIYA, Ken ISHII
  • Patent number: 10286492
    Abstract: A nozzle as a welded structure includes a nozzle body, and a buckling prevention fin joined to the nozzle body by laser welding, in which an end of the buckling prevention fin before laser welding is disposed to face the nozzle body, an installed state of the nozzle body and the buckling prevention fin includes an installed state in which a gap is formed between the nozzle body and the buckling prevention fin, and the buckling prevention fin has a beveled portion which is beveled at the end facing the nozzle body.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: May 14, 2019
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takehisa Okuda, Tadashi Itoyama, Yasuyuki Fujiya
  • Publication number: 20190084085
    Abstract: A welding method for welding a cast iron (first member) and a steel (second member) having a lower hardness than the cast iron, which comprises: a first step for inserting an insert material (third member) having a lower hardness than the steel between the cast iron and the steel; a second step for welding the boundary portion between the cast iron and the insert material; and a third step for welding the boundary portion between the steel and the insert material. Consequently, this welding method is able to improve the strength characteristics after welding.
    Type: Application
    Filed: May 8, 2017
    Publication date: March 21, 2019
    Applicant: MITSUBISHI HEAVY INDUSTRIES MACHINE TOOL CO., LTD.
    Inventors: Yasuyuki FUJIYA, Masao WATANABE
  • Publication number: 20170050268
    Abstract: Disclosed is a processing nozzle for simultaneously ejecting a plurality of types of powder materials. This processing nozzle is a processing nozzle used to eject a powder material to a molten pool formed on a process surface by a laser beam, and includes an inner housing that forms an optical path to pass the laser beam, and an outer housing arranged while being separated from the inner housing by a gap serving as a first supply path of the powder material. A second supply path of the powder material and a third supply path having a diameter different from the second supply path are provided inside the outer housing.
    Type: Application
    Filed: March 24, 2015
    Publication date: February 23, 2017
    Applicant: TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING
    Inventors: Yasuyuki FUJIYA, Yoshinao KOMATSU, Ryuichi NARITA
  • Publication number: 20170036302
    Abstract: A nozzle as a welded structure includes a nozzle body, and a buckling prevention fin joined to the nozzle body by laser welding, in which an end of the buckling prevention fin before laser welding is disposed to face the nozzle body, an installed state of the nozzle body and the buckling prevention fin includes an installed state in which a gap is formed between the nozzle body and the buckling prevention fin, and the buckling prevention fin has a beveled portion which is beveled at the end facing the nozzle body.
    Type: Application
    Filed: April 10, 2015
    Publication date: February 9, 2017
    Inventors: Takehisa OKUDA, Tadashi ITOYAMA, Yasuyuki FUJIYA
  • Publication number: 20160228989
    Abstract: A laser welding method of the present invention is a laser welding method for irradiating with a laser beam a groove portion 6 formed along a circumferential direction by butting axial end portions of cylindrical bodies 5a, 5b together to weld the groove portion, the method comprising: a welding process S2 of irradiating the groove portion 6 with the laser beam over the entire circumference to weld the groove portion; and a strain correction process S4 of irradiating the groove portion 6 with the laser beam over the entire circumference, the laser beam having a heat input amount smaller than a heat input amount per unit area of the laser beam emitted in the welding process S2.
    Type: Application
    Filed: January 29, 2014
    Publication date: August 11, 2016
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Keisuke Kamitani, Shuho Tsubota, Takafumi Aoyama, Yasuyuki Fujiya
  • Patent number: 9358638
    Abstract: A movable vacuum welding device (1) includes a vacuum chamber (7) having an edge section (12) opposite to a surface of a welding target (T) and forming a vacuum space between the surface of the welding target (T) and the vacuum chamber (7), a seal section (8) interposed between the edge section (12) and the welding target (T) throughout the entire circumference of the edge section (12), a welding head (9) configured to perform welding on the surface of the welding target (T) in the vacuum space, and a preload unit (10) configured to previously apply a load to the seal section (8). The seal section (8) includes a first seal member (27) formed of an elastic material and extending along the edge section (12), and a second seal member (28) disposed at least a rear side in a relative moving direction in which a welding bead (W) passes and having higher flexibility than the first seal member (27).
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: June 7, 2016
    Assignee: MITSUBISHI HEAVY INDUSTRIES MACHINE TOOL CO., LTD.
    Inventors: Takumi Hori, Yasuyuki Fujiya, Takehisa Okuda, Osamu Hasegawa, Katsuya Sennyu, Masao Watanabe, Takaaki Kaikogi
  • Publication number: 20150258633
    Abstract: A movable vacuum welding device (1) includes a vacuum chamber (7) having an edge section (12) opposite to a surface of a welding target (T) and forming a vacuum space between the surface of the welding target (T) and the vacuum chamber (7), a seal section (8) interposed between the edge section (12) and the welding target (T) throughout the entire circumference of the edge section (12), a welding head (9) configured to perform welding on the surface of the welding target (T) in the vacuum space, and a preload unit (10) configured to previously apply a load to the seal section (8). The seal section (8) includes a first seal member (27) formed of an elastic material and extending along the edge section (12), and a second seal member (28) disposed at at least a rear side in a relative moving direction in which a welding bead (W) passes and having higher flexibility than the first seal member (27).
    Type: Application
    Filed: July 26, 2013
    Publication date: September 17, 2015
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takumi Hori, Yasuyuki Fujiya, Takehisa Okuda, Osamu Hasegawa, Katsuya Sennyu, Masao Watanabe, Takaaki Kaikogi
  • Publication number: 20150233257
    Abstract: A method of welding erosion resistance metallic material is a method of welding erosion resistance metallic material to a base element (1) of a turbine blade leading edge portion (1A). The method includes the steps of: forming a curved surface in the leading edge portion (1A) to which the erosion resistance metallic material is applied so that a radius R of the curved surface is larger than thickness t of the base element (1); and welding the erosion resistance metallic material to the leading edge portion (1A).
    Type: Application
    Filed: September 20, 2013
    Publication date: August 20, 2015
    Inventors: Yasuyuki Fujiya, Takehisa Okuda, Hiroharu Oyama, Motonari Machida
  • Publication number: 20120211476
    Abstract: Provided is a cutting apparatus for fiber-reinforced plastics that reduces an increase in processing cost and also reduces a decrease in the quality of a cut surface. The cutting apparatus includes a laser emitter (10) for emitting pulsed laser light for irradiation of a fiber-reinforced plastic (2) to be cut and a cutting head (30) for outputting the laser light emitted from the laser emitter (10) toward the fiber-reinforced plastic (2), the laser light has a pulse width of no less than 1 fs and no more than 999 ps, and the moving speed of the cutting head (30) relative to the fiber-reinforced plastic (2) is about 1.5 m/min or more.
    Type: Application
    Filed: October 28, 2010
    Publication date: August 23, 2012
    Inventors: Yasuyuki Fujiya, Nozomu Kawasetsu, Michisuke Nayama, Satoru Nooka, Tomoyoshi Baba