Patents by Inventor Shuhei Ogura

Shuhei Ogura 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: 11504917
    Abstract: A high viscosity material is discharged in the form of a continuous thread from an application nozzle toward an end of a workpiece and a space S on the side of the workpiece so that the high viscosity material in the form of the thread adheres to a front surface of the workpiece and the high viscosity material discharged in the form of the thread into the space on the side of the workpiece pivots around an edge of the workpiece to a back surface of the workpiece and adheres to the back surface of the workpiece. The high viscosity material can thus be applied to both the front and back surfaces of the workpiece in one step of discharging the high viscosity material only from the front surface side of the workpiece.
    Type: Grant
    Filed: March 3, 2021
    Date of Patent: November 22, 2022
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, ATLAS COPCO KK
    Inventors: Shuhei Ogura, Hiroki Sugino, Tomohiko Sekiguchi, Shingo Adachi, Koki Kuwabara
  • Publication number: 20220297224
    Abstract: A welding determination method is provided, which determines whether a spot welding part is joined to an electrode without using resistance generated when separating the electrode from a workpiece. In the method, the workpiece made by laminating multiple metal sheets is clamped under pressure by a pair of electrodes and melted by a current applied, and after that the conduction is stopped to hold the workpiece in a pressurized state to determine whether the joining occurs. The method includes the steps of: deriving resistance between the pair of electrodes and pressurizing force by the pair of electrodes during conduction to the workpiece; and determining whether the spot welding part is joined to the electrodes based on a first index value calculated using the derived resistance and resistance in an ideal welding, and on a second index value calculated using the derived pressurizing force and pressurizing force in the ideal welding.
    Type: Application
    Filed: February 4, 2022
    Publication date: September 22, 2022
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yosuke TAMADA, Kyosuke IZUNO, Tomohiko SEKIGUCHI, Shuhei OGURA, Chikaumi SAWANISHI
  • Patent number: 11400540
    Abstract: An iron rivet including a head and a shank, an aluminum plate, an iron plate, and first and second electrodes are prepared. A sandwiching step of sandwiching the rivet, the aluminum plate, and the iron plate between the first electrode and the second electrode, a penetration step of performing pressurization and current application by the first and second electrodes so that the shank penetrates through the aluminum plate, and a forming step of performing pressurization and current application by the first and second electrodes so that a nugget is formed between the shank and the iron plate are included. In the penetration step, the pressurization and current application is performed while air is blown to a side face of the shank so that the air hits a region around a boundary between the shank and the aluminum plate.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: August 2, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shotaro Kurokawa, Shuhei Ogura, Atsushi Kawakita, Keisuke Shinohara
  • Publication number: 20220111464
    Abstract: A novel spot welding method for steel sheets and an aluminum alloy sheet, includes stacked sheet materials from a pair of opposing electrodes to join the sheet materials by resistance heating. The pair of opposing electrodes are in pressure contact with both outer surfaces of the sheet sets. The sheet sets include at least a first and second steel sheet, and an aluminum alloy sheet stacked in this order. A first energization step forms a molten pool between facing surfaces of the first and second steel sheets without melting the aluminum alloy sheet. A second energization step causes a melting reaction between facing surfaces of the second steel sheet and the aluminum alloy sheet. The first and second steel sheets are joined via a first nugget. The second steel sheet and the aluminum alloy sheet are joined via a second nugget including an intermetallic compound generated by the melting reaction.
    Type: Application
    Filed: July 12, 2021
    Publication date: April 14, 2022
    Applicants: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hideaki MATSUOKA, Takashi ASADA, Tatsuyuki AMAGO, Kyosuke IZUNO, Koki NAKADA, Tomohiko SEKIGUCHI, Shuhei OGURA
  • Patent number: 11247293
    Abstract: A highly corrosion-resistant spot weldment can be produced at low cost without occurrence of prominent protrusions and the like on the surface. The spot weldment is joined by a nugget formed inside stacked sheet materials through bringing a pair of electrodes arranged opposite to each other into pressure contact with the stacked sheet materials from outside and energizing the stacked sheet materials from the electrodes. The nugget has a diameter that is ?4?t (t: thickness of sheet material) and a flattening level of 3.5 to 8, which is a ratio of diameter to thickness. Both outer surface parts of the sheet materials are free from protrusions formed due to bulging of molten metal. Even when the electrodes are made of a copper alloy, the increased amount of Cu in the outer surface parts is 0.2 mass % or less with respect to the component composition before spot welding.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: February 15, 2022
    Assignees: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hideaki Matsuoka, Tatsuyuki Amago, Takashi Asada, Toru Hioki, Manabu Ooga, Shuhei Ogura
  • Patent number: 11247292
    Abstract: Provided are a method and an apparatus for resistance spot welding in which preliminary current application is executed and then main welding is executed in accordance with master patterns of various parameters obtained during the preliminary current application. The main welding is executed under welding conditions of the master patterns, and whether a welding abnormality has occurred and whether the welding abnormality is likely to occur are determined. When the welding abnormality is likely to occur, the welding conditions for the main welding are corrected so as to prevent the welding abnormality. When the welding abnormality is unlikely to occur, the welding conditions for the main welding are corrected so as to match the master patterns.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: February 15, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Koji Nomura, Shuhei Ogura, Atsushi Kawakita, Naoya Kato, Toru Hioki, Kenji Fukushima, Shun Kato, Takashi Goto
  • Patent number: 11229976
    Abstract: Partial welding of partially joining together two metal plates by melting at least one area inside a joining region of the metal plates is performed. After a lapse of a predetermined time from completion of the partial welding, main welding of joining together the metal plates by melting the joining region entirely is performed.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: January 25, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Toru Hioki, Atsushi Kawakita, Shuhei Ogura, Ryosuke Kawai, Takashi Goto, Kazuho Takishita
  • Patent number: 11135671
    Abstract: A resistance spot welding method includes sandwiching metal plates put on top of one another between a pair of electrodes and performing resistance spot welding sequentially on a plurality of welding points close to each other on the metal plates by performing a current application between the electrodes so as to join the metal plates to each other. A welding current value to form a welding nugget at a welding point to be subjected to the resistance spot welding second or later among the welding points is set to be higher than a first welding current value to form a first welding nugget at a first welding point to be subjected to the resistance spot welding first among the welding points.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: October 5, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Toru Hioki, Shuhei Ogura, Atsushi Kawakita, Yoichi Tsutsumi, Takashi Goto
  • Publication number: 20210291462
    Abstract: A high viscosity material is discharged in the form of a continuous thread from an application nozzle toward an end of a workpiece and a space S on the side of the workpiece so that the high viscosity material in the form of the thread adheres to a front surface of the workpiece and the high viscosity material discharged in the form of the thread into the space on the side of the workpiece pivots around an edge of the workpiece to a back surface of the workpiece and adheres to the back surface of the workpiece. The high viscosity material can thus be applied to both the front and back surfaces of the workpiece in one step of discharging the high viscosity material only from the front surface side of the workpiece.
    Type: Application
    Filed: March 3, 2021
    Publication date: September 23, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, ATLAS COPCO KK
    Inventors: Shuhei OGURA, Hiroki SUGINO, Tomohiko SEKIGUCHI, Shingo ADACHI, Koki KUWABARA
  • Publication number: 20210046585
    Abstract: While a laser-beam application position is moved along a locus which circularly or elliptically circles around a locus center so as to cross a weld line that is a boundary between a first metal plate and a second metal plate overlapped with each other, the locus center is moved in a direction parallel to a weld line. A moving direction of the laser-beam application position is set such that the laser beam is first applied to the first metal plate and then to the second metal plate when the laser beam passes through an unmelted zone of the first metal plate and the second metal plate. The unmelted zone is located downstream of a range through which the laser beam has already passed in the direction parallel to the weld line.
    Type: Application
    Filed: October 30, 2020
    Publication date: February 18, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Toru HIOKI, Shuhei OGURA, Hiroki TORIYAMA, Ryosuke KAWAI, Shun KATO
  • Patent number: 10857624
    Abstract: While a laser-beam application position is moved along a locus which circularly or elliptically circles around a locus center so as to cross a weld line that is a boundary between a first metal plate and a second metal plate overlapped with each other, the locus center is moved in a direction parallel to a weld line. A moving direction of the laser-beam application position is set such that the laser beam is first applied to the first metal plate and then to the second metal plate when the laser beam passes through an unmelted zone of the first metal plate and the second metal plate. The unmelted zone is located downstream of a range through which the laser beam has already passed in the direction parallel to the weld line.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: December 8, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Toru Hioki, Shuhei Ogura, Hiroki Toriyama, Ryosuke Kawai, Shun Kato
  • Patent number: 10786872
    Abstract: A welding method for integrally welding three or more superposed metal plates includes a spot welding of joining the first vehicle body structure plate and the second vehicle body structure plate by spot welding in a plurality of places along an opening edge of the door opening portion in a state where each of the metal plates is superposed, and a laser welding of joining the surface plate and the first vehicle body structure plate in a plurality of places including a place between welding places of the spot welding after the spot welding. The joining being performed by emitting laser light to the surface plate and by scanning the laser light to stir a molten pool including a molten metal of the surface plate and the first vehicle body structure plate melted by the laser light.
    Type: Grant
    Filed: June 13, 2018
    Date of Patent: September 29, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Kawakita, Shuhei Ogura, Hiroki Sugino, Wataru Mizuno, Ryuta Matsuo
  • Publication number: 20200130098
    Abstract: An iron rivet including a head and a shank, an aluminum plate, an iron plate, and first and second electrodes are prepared. A sandwiching step of sandwiching the rivet, the aluminum plate, and the iron plate between the first electrode and the second electrode, a penetration step of performing pressurization and current application by the first and second electrodes so that the shank penetrates through the aluminum plate, and a forming step of performing pressurization and current application by the first and second electrodes so that a nugget is formed between the shank and the iron plate are included. In the penetration step, the pressurization and current application is performed while air is blown to a side face of the shank so that the air hits a region around a boundary between the shank and the aluminum plate.
    Type: Application
    Filed: September 17, 2019
    Publication date: April 30, 2020
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shotaro Kurokawa, Shuhei Ogura, Atsushi Kawakita, Keisuke Shinohara
  • Publication number: 20200114458
    Abstract: A highly corrosion-resistant spot weldment can be produced at low cost without occurrence of prominent protrusions and the like on the surface. The spot weldment is joined by a nugget formed inside stacked sheet materials through bringing a pair of electrodes arranged opposite to each other into pressure contact with the stacked sheet materials from outside and energizing the stacked sheet materials from the electrodes. The nugget has a diameter that is ?4?t (t: thickness of sheet material) and a flattening level of 3.5 to 8, which is a ratio of diameter to thickness. Both outer surface parts of the sheet materials are free from protrusions formed due to bulging of molten metal. Even when the electrodes are made of a copper alloy, the increased amount of Cu in the outer surface parts is 0.2 mass % or less with respect to the component composition before spot welding.
    Type: Application
    Filed: September 19, 2019
    Publication date: April 16, 2020
    Applicants: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hideaki MATSUOKA, Tatsuyuki AMAGO, Takashi ASADA, Toru HIOKI, Manabu OOGA, Shuhei OGURA
  • Publication number: 20200114461
    Abstract: An electrode tip for resistance spot welding includes a main body with tip and base portions. The tip portion has a bottomed and substantially cylindrical shape. The base portion has a substantially cylindrical shape and merges into the tip portion. The main body is made of a copper alloy such as chromium copper. The tip portion has a bottom part and a barrel part. The bottom part has a pressure-contact surface that is not recessed with respect to a workpiece to be pressed. The barrel part has a substantially cylindrical shape and merges into the bottom part. The electrode tip may have an inner diameter ratio (inner diameter of the barrel part to an outer diameter of the base portion) of 0.4 to 0.6, and may also have a bottom thickness ratio (thickness of the bottom part to the outer diameter of the base portion) of 0.15 to 0.5.
    Type: Application
    Filed: September 19, 2019
    Publication date: April 16, 2020
    Applicants: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hideaki MATSUOKA, Tatsuyuki AMAGO, Takashi ASADA, Toru HIOKI, Manabu OOGA, Shuhei OGURA
  • Publication number: 20200009686
    Abstract: Provided is a laser welding method for performing lap welding on a plurality of laminated metal plates by applying a laser beam to the metal plates. The metal plates are constituted by n pieces of metal plates laminated in order from a first metal plate to an n-th metal plate, n being an integer not less than 2. The laser welding method includes: forming a recess serving as an escape route for gas by applying a first laser beam from the first metal plate side, the escape route penetrating through the first metal plate to an (n?1)th metal plate in the laminating direction to reach the n-th metal plate; and forming a welding pool around the recess so as to maintain the shape of the recess, the welding pool being formed by applying a second laser beam to the outside of the recess.
    Type: Application
    Filed: May 10, 2019
    Publication date: January 9, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shuhei Ogura, Hiroki Sugino, Ryuta Matsuo, Ryosuke Kawai, Kazuho Takishita
  • Publication number: 20190381601
    Abstract: A laser welding method and a welded structure are provided to improve joining strength by increasing the throat depth and to prevent cracks due to stress concentration by increasing an angle at the back of the throat. The laser welding method for lap welding of multiple layered steel plates by irradiation with a laser beam includes: a step of forming a molten pool penetrating the first steel plate in a layer direction and reaching the second steel plate by irradiating the first steel plate with a first laser beam LB1; and a step of melting an outer peripheral edge of the molten pool by irradiating an outer periphery of the molten pool on the first steel plate with a second laser beam LB2 having a spot diameter D2 larger than a spot diameter D1 of the first laser beam LB1.
    Type: Application
    Filed: June 11, 2019
    Publication date: December 19, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ryuta MATSUO, Shuhei OGURA, Hiroki SUGINO
  • Publication number: 20190366479
    Abstract: In a laser welding method, generation of relatively large blow holes in a welding part is prevented while decrease in productivity is reduced. The laser welding method for lap welding, using a laser beam LB, of a plurality of metal plates and including an aluminum alloy cast plate includes: a melting path of scanning and irradiating circularly a superimposed part of the aluminum alloy plate and the aluminum alloy cast plate with a first laser beam LB1 to form a molten pool of the molten aluminum alloy plate and the molten aluminum alloy cast plate; and a stirring path of scanning and irradiating circularly the molten pool with a second laser beam LB2 having a scanning speed V2 faster than a scanning speed V1 of the first laser beam LB1 to stir the molten pool.
    Type: Application
    Filed: May 30, 2019
    Publication date: December 5, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Toru HIOKI, Shuhei OGURA, Atsushi KAWAKITA, Koki NAKADA, Takashi GOTO, Ryosuke KAWAI
  • Publication number: 20190329361
    Abstract: A laser welding method is provided to ensure a sufficient joining strength between metal plates by increasing the area of a joining region while preventing “burn through” of a molten metal. In the laser welding method by applying a laser beam to a surface of multiple metal plates superimposed on each other, a scanning locus with the laser beam is sequentially shifted from an inner circular scanning locus to an outer one in a predetermined joining region on the metal plates, and an emission interval is provided to temporally stop the metal-plate-surface irradiation when the scanning locus is shifted. Thus, every time the scanning locus is shifted, the molten metal due to the previous irradiation is cooled and increases its viscosity. Accordingly, the “burn through” is prevented regardless of increase of the area of the joining region, which results in a sufficient joining strength between the metal plates.
    Type: Application
    Filed: April 24, 2019
    Publication date: October 31, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Koki Nakada, Toru Hioki, Atsushi Kawakita, Shuhei Ogura, Takashi Goto
  • Patent number: 10456865
    Abstract: A welding method for joining together a plurality of welding objects by overlapping the plurality of welding objects and performing laser welding includes forming a weld by forming a plurality of nuggets along a virtual closed curve on the welding objects, by laser welding. A ratio of a diameter of the nuggets to a pitch dimension between the nuggets that are adjacent to each other is larger than ½ and no more than 1.
    Type: Grant
    Filed: April 20, 2015
    Date of Patent: October 29, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kohei Hisada, Shuhei Ogura, Junichiro Makino, Kazuyuki Ogusu, Masahiro Nakata