Patents by Inventor Reiichi Suzuki

Reiichi Suzuki 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).

  • Publication number: 20210291298
    Abstract: The present invention relates to a method for manufacturing a joint structure of dissimilar materials. The method includes forming a low-temperature thermal spray coating on at least a part of a surface of an aluminum or aluminum alloy material by low-temperature thermal spraying a metal powder of at least one metal selected from the group consisting of ferritic stainless steel, austenitic stainless steel, and ferritic and austenitic two-phase stainless steel, overlapping the aluminum or aluminum alloy material and a steel material such that the low-temperature thermal spray coating and the steel material face each other, and joining the low-temperature thermal spray coating and the steel material by a laser welding from a steel material side.
    Type: Application
    Filed: July 11, 2019
    Publication date: September 23, 2021
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Kyohei MAEDA, Reiichi SUZUKI
  • Publication number: 20210276126
    Abstract: A joint structure is formed by joining a first plate-shaped member made of steel and a second plate-shaped member made of steel that is overlapped on the first plate-shaped member and that is formed in a long shape. A surface of the first plate-shaped member and both edge portions of the second plate-shaped member along a longitudinal direction are joined by a weld metal.
    Type: Application
    Filed: May 31, 2019
    Publication date: September 9, 2021
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Liang CHEN, Kenichi WATANABE, Kazuya YASUI, Dongyong SHI, Masao HADANO, Takayuki KIMURA, Reiichi SUZUKI
  • Publication number: 20210246924
    Abstract: The present invention relates to a method for joining a plated steel sheet, in which at least one of a first steel sheet and a second steel sheet is a plated steel sheet, and the first and second steel sheets overlapped with each other are subjected to an arc spot welding. The method includes press-working the first steel sheet into a desired shape and at the same time forming a linear groove on an overlapping surface with the second steel sheet of the first steel sheet, overlapping the first and second steel sheets, and setting a welding torch with the groove as a target position, and performing the arc spot welding so as to overlap the groove when viewed from a direction perpendicular to the overlapping surface.
    Type: Application
    Filed: May 31, 2019
    Publication date: August 12, 2021
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventor: Reiichi SUZUKI
  • Publication number: 20200398376
    Abstract: Provided is a manufacturing method for a joint body having a blank material plated with a metal material and a hoop material plated with a metal material joined together by placing the hoop material on the blank material and causing a laser oscillation system to irradiate a surface of the hoop material with laser light to form a joint portion including a line-shaped welded portion where the blank material and the hoop material are joined together. In this manufacturing method, the hoop material is supplied to be placed on the blank material and form a predetermined gap d between the blank material and the hoop material, and the hoop material is irradiated with a laser at a position where the predetermined gap d is located between the blank material and the hoop material to join the blank material and the hoop material together by laser welding.
    Type: Application
    Filed: August 1, 2018
    Publication date: December 24, 2020
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Kenichi WATANABE, Takayuki KIMURA, Liang CHEN, Masao HADANO, Reiichi SUZUKI
  • Patent number: 10864594
    Abstract: A gas-shielded arc welding method includes feeding a consumable electrode via a welding torch and performing welding while flowing a shielding gas. The welding torch includes a nozzle. An inner diameter of the nozzle is 15 mm or more. A nozzle-base material distance between a tip of the nozzle and a material to be welded is 22 mm or less. A ratio expressed by (the inner diameter of the nozzle/the nozzle-base material distance) is 0.7 or more and 1.9 or less.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: December 15, 2020
    Assignees: Kobe Steel, Ltd., Mazda Motor Corporation
    Inventors: Minoru Miyata, Reiichi Suzuki, Masaaki Tanaka, Mitsugi Fukahori, Takashi Ogawa
  • Publication number: 20200384567
    Abstract: The present invention relates to an arc welding method for dissimilar material joining for joining a first plate made of an aluminum alloy or a magnesium alloy and a second plate made of steel. A steel-made joining assist member has a stepped external shape including a large-diameter portion and a small-diameter portion, has a hollow portion formed to penetrate the large-diameter portion and the small-diameter portion, and has a total height of the large-diameter portion and the small-diameter portion being equal to or larger than a thickness of the first plate. A pressure is applied to the joining assist member to punch the first plate. The hollow portion of the joining assist member is filled with a weld metal. The weld metal is melted until a penetration bead is formed on the second plate, to weld the second plate and the joining assist member together.
    Type: Application
    Filed: January 25, 2019
    Publication date: December 10, 2020
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventor: Reiichi SUZUKI
  • Publication number: 20200376598
    Abstract: A manufacturing method for a joint body having a first metal member and a second metal member joined together by causing a laser oscillation system to irradiate a surface of the second metal member placed on the first metal member with laser light to form a joint portion including a welded portion where the first metal member and the second metal member are joined together includes continuously supplying the second metal member while pressing the second metal member against the first metal member, the second metal member being a hoop material, and causing the laser oscillation system to emit the laser light.
    Type: Application
    Filed: August 3, 2018
    Publication date: December 3, 2020
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Kenichi WATANABE, Takayuki KIMURA, Liang CHEN, Masao HADANO, Reiichi SUZUKI
  • Publication number: 20200353552
    Abstract: The present invention pertains to: a method for arc spot welding a steel plate having a carbon equivalent CeqBM of 0.35 or more (the carbon equivalent CeqBM is defined in the specification), the method being characterized in that a welding wire containing 98.5 mass % or more of Fe is used, and the ratio between the carbon equivalent CeqWM of a weld metal formed by the method (the carbon equivalent CeqWM of the weld metal is defined in the specification) and the carbon equivalent CeqBM of the steel plate, CeqWM/CeqBM is 0.2-1.0. According to the arc spot welding method, brittle fracture can be prevented and high joint strength can be obtained even when the C content in the steel plate is high.
    Type: Application
    Filed: August 2, 2017
    Publication date: November 12, 2020
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Takashi YASHIMA, Reiichi SUZUKI, Minoru MIYATA
  • Publication number: 20200246914
    Abstract: Provided is a manufacturing method for a joint body having a first metal member and a second metal member joined together by welding. With a density of the welding set higher than a density of the welding of other portions, the second metal member is bent within a plane by changing a positional relation of the second metal member relative to the first metal member in plan view.
    Type: Application
    Filed: August 3, 2018
    Publication date: August 6, 2020
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Kenichi WATANABE, Takayuki KIMURA, Liang CHEN, Masao HADANO, Reiichi SUZUKI
  • Patent number: 10702955
    Abstract: The purpose of the present invention is to provide a flux cored wire which has good high-temperature cracking resistance, and which enables the achievement of a welded part exhibiting excellent coating adhesion. The present invention relates to a metal flux cored wire for gas-shielded are welding, which contains, relative to the total mass of the wire, 0.02-0.30% by mass of C, 0.3-1.5% by mass of Si, 0.3-2.5% by mass of Mn, and oxide of at least one element selected from the group consisting of Si, Cr and Ni in an amount of 0.01-0.30% by mass in total, 0.020% by mass or less of S, and 0.3% by mass or less of Al, Ca, Mg, K and Na in total in the form of metals or alloys, with the balance made up of Fe and unavoidable impurities.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: July 7, 2020
    Assignee: Kobe Steel, Ltd.
    Inventors: Minoru Miyata, Reiichi Suzuki, Kei Yamazaki
  • Patent number: 10682718
    Abstract: A method for welding a galvanized steel sheet includes utilizing a pulse welding of repeatedly applying a pulse peak current and a base current, setting a welding speed to 100 cm/min or less, and using a shielding gas in which 1 vol % or more and 10 vol % or less of at least either one of CO2 and O2 is added to Ar. The pulse peak current has a pulse peak time being in a range of 7% or more and less than 50% of one period depending on a sheet thickness of the galvanized steel sheet.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: June 16, 2020
    Assignee: Kobe Steel, Ltd.
    Inventors: Minoru Miyata, Reiichi Suzuki
  • Publication number: 20200180072
    Abstract: A joint body includes first and second metal members and a joint portion including a welded portion where the first and second metal members are joined together, the welded portion having a line shape. The joint portion includes first and second longitudinal portions and a plurality of connecting portions. The first longitudinal portion has first intersecting portions arranged in a first direction and extends in the first direction. The second longitudinal portion has second intersecting portions arranged in the first direction and extends in the first direction. The welded portion intersects itself at the first and second intersecting portions. The connecting portions are arranged in the first direction. The connecting portions extend in a first direction and connect the first and second longitudinal portions.
    Type: Application
    Filed: August 3, 2018
    Publication date: June 11, 2020
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Kenichi WATANABE, Kazuya YASUI, Dongyong SHI, Takayuki KIMURA, Liang CHEN, Masao HADANO, Reiichi SUZUKI
  • Publication number: 20200180062
    Abstract: A plurality of welding torches, which are disposed in a welding device and are made movable in three-dimensional directions, are provided with welding wires that differ in composition and diameter from each other. When welding is performed in the horizontal direction, an arc is generated by at least two of the welding torches to form a bead while the welding wires are being fed. When welding is performed in the vertical direction, the arc is generated by any one welding torch of the two welding torches to form a bead while the welding wire is being fed. Thus, a steel sheet to which an anti-corrosion material has been applied can be welded continuously with high quality and high-efficiency in a horizontal orientation and vertical orientation.
    Type: Application
    Filed: April 12, 2017
    Publication date: June 11, 2020
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Reiichi SUZUKI, Yimin YUAN
  • Publication number: 20200039006
    Abstract: The present invention relates to a method for arc-welding a steel plate having a C content of 0.08-0.30% by mass, wherein the arc welding method comprises welding under a condition whereby X represented by formula (1) is 200 or less using a welding wire in which the total content of Cr and Ni thereof is 1.00% by mass or greater. (1): X=0.8×(300-279[C]W-25[Si]W-35[Mn]W-49[Ni]W-47[Cr]W-61[Mo]W) +0.2×(300-279[C]BM-25[Si]BM-35[Mn]BM-49[Ni]BM-47[Cr]BM-61[Mo]BM) (where [C]W, [Si]W, [Mn]W, [Ni]W, [Cr]W, [Mo]W, [C]BM, [Si]BM, [Mn]BM, [Ni]BM, [Cr]BM, and [Mo]BM are defined in the specification).
    Type: Application
    Filed: April 26, 2018
    Publication date: February 6, 2020
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Takashi YASHIMA, Reiichi SUZUKI, Minoru MIYATA
  • Publication number: 20190358732
    Abstract: A steel plate frame and a thin plate are made of different materials. A plurality of through holes are formed in a portion of the thin plate to be placed on the steel plate frame. A plurality of projections 6c are formed on a support plate, each of the projections being allowed to be inserted into a corresponding one of the through holes. An adhesive is applied to a portion of the steel plate frame on which the thin plate is placed. The thin plate is placed on the steel plate frame, and the steel plate frame and the thin plate are bonded together by the adhesive. The support plate is placed on the thin plate to insert the projections into the through holes. The projections and the steel plate frame are welded to form a plurality of welded spots.
    Type: Application
    Filed: January 10, 2018
    Publication date: November 28, 2019
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Kenichi WATANABE, Reiichi SUZUKI, Hideto KATSUMA
  • Publication number: 20190232417
    Abstract: A gas-shielded arc welding method includes welding a steel plate having a tensile strength of 780 MPa or more while feeding a consumable electrode via a welding torch and flowing a shielding gas. The consumable electrode includes, in mass %, C: 0 to 0.20%, Si: 0 to 0.50%, Mn: 0 to 0.50%, Cr: 1.00% to 9.00%, S: 0.0020% to 0.0600%, and Ni: 0 to 0.50%. The shielding gas includes, in vol. %, at least one of CO2 and O2: 1% to 15% in total, with the remainder being Ar and unavoidable impurities. Welding is performed under the condition satisfying the relationship of 1?{?0.05×[CO2+O2]}+[Cr]?8.3, and [Cr] represents the content of Cr in the consumable electrode, and [CO2+O2] represents a total content of at least one of CO2 and O2 in the shielding gas.
    Type: Application
    Filed: June 19, 2017
    Publication date: August 1, 2019
    Applicants: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), JFE Steel Corporation
    Inventors: Minoru MIYATA, Reiichi SUZUKI, Hiroshi MATSUDA, Rinsei IKEDA, Sachiko SUZUKI, Satoru ANDO
  • Publication number: 20190232411
    Abstract: The present invention pertains to: a method for arc spot welding a steel plate having a carbon equivalent CeqBM of 0.35 or more (the carbon equivalent CeqBM is defined in the specification) and containing 0.35 mass % or more of C, the method being characterized by forming a weld metal having a structure in which the proportion of an austenitic structure exceeds 80%; and a welding wire suitable for being used therefor. According to the arc spot welding method, brittle fracture can be prevented and high joint strength can be obtained even when the C content in the steel plate is high.
    Type: Application
    Filed: August 2, 2017
    Publication date: August 1, 2019
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Takashi YASHIMA, Reiichi SUZUKI, Minoru MIYATA
  • Patent number: 10363625
    Abstract: Disclosed is a method for performing gas-shielded pulsed arc welding at high current densities with a flux-cored wire as an electrode wire. The pulsed arc welding is carried out by passing a pulsed current so that a pulse peak current density during a pulse peak time Tp is 400 to 950 A/mm2, a pulse base current density during a pulse base time Tb is 200 A/mm2 or more and differs from the pulse peak current density by 200 to 400 A/mm2, and an average current density is 350 to 750 A/mm2. The method allows significant spatter reduction while attaining a high deposition rate.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: July 30, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Kei Yamazaki, Reiichi Suzuki, Yimin Yuan
  • Publication number: 20190226048
    Abstract: Disclosed is a method for producing a steel part, which includes the steps of: preparing a built-up steel sheet including a steel sheet 20 including: C: 0.15 to 0.5% by mass, Si: 0.10 to 3% by mass, Mn: 0.5 to 5% by mass, P: 0.05% by mass or less (excluding 0%), S: 0.05% by mass or less (excluding 0%), Al: 0.01 to 1% by mass, B: 0.0002 to 0.01% by mass, Ti: 0.005 to (3.4[N]+0.1) % by mass (in which [N] represents a content of N (% by mass)), and N: 0.001 to 0.01% by mass, with the balance being iron and inevitable impurities, and one or more built-up portions 30 provided on the steel sheet 20; hot-forming the built-up steel sheet at a temperature of an Ac3 point or higher of the steel sheet 20; and cooling the hot-formed built-up steel sheet to a temperature of an Ms point or lower of the steel sheet such that an area ratio of martensite in the metal structure of the steel sheet 20 is 70% or more.
    Type: Application
    Filed: September 13, 2017
    Publication date: July 25, 2019
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Takayuki KIMURA, Reiichi SUZUKI, Hideto KATSUMA, Kenichi WATANABE, Liang CHEN
  • Publication number: 20190126411
    Abstract: In this flux-cored wire, the contents of F, Li, acid-soluble Al, Mg, S, CO2, Ba, Ca, Sr, REM, P, C which is not derived from a carbonate, Mn, Ni, and Cu are set to fall within prescribed ranges with respect to the total mass of the wire, and the blending ratio among these components is set to fall within a particular range.
    Type: Application
    Filed: April 25, 2017
    Publication date: May 2, 2019
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Naoki KAWABE, Eri YAMAMOTO, Kei YAMAZAKI, Reiichi SUZUKI