Patents by Inventor Shun Izutani

Shun Izutani 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: 20220362892
    Abstract: A flux-cored wire comprising a flux which is a core and a hoop which is an outer skin or sheath is described. The flux includes a strong deoxidizing metal element containing Mg and Al, and a fluoride powder. At least 60 mass % of a strong deoxidizing metal powder related to the strong deoxidizing metal element has a grain size of at most 150 ?m. At least 60 mass % of the fluoride powder has a grain size of at most 75 ?m. The flux is present at a concentration of 10-30 mass % relative to a total mass of the flux-cored wire. The flux-cored wire also requires a specific composition of elements.
    Type: Application
    Filed: June 9, 2020
    Publication date: November 17, 2022
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Keito ISHIZAKI, Takashi YASHIMA, Shun IZUTANI
  • Publication number: 20220219266
    Abstract: The present invention relates to a flux-cored wire for positive polarity gas-shielded arc welding use, in which a flux contains a metal powder and also contains BaF2 and SrF2 and AlF3 and/or CaF2 as fluorides wherein the content of BaF2 is 1.0 to 4.5%, the content of SrF2 is 2.0% or less, the content of CaF2 is 0.45% or less and the content of AlF3 is 0.70% or less, at least one of metal elements constituting the flux and the fluorides is a strong deoxidizing metal element having a specified standard formation Gibbs energy, and the content of each of an oxide and a carbonate in the flux is 0.5% or less.
    Type: Application
    Filed: May 1, 2020
    Publication date: July 14, 2022
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Naoki MUKAI, Shun IZUTANI, Takashi YASHIMA
  • Publication number: 20220193833
    Abstract: The present invention relates to a flux-cored wire which can be used for straight-polarity gas-shielded arc welding, wherein a flux contains one or several types of metal compound powders and, when one or several metal elements constituting the metal compound powders are formed into stable compounds under a high-temperature environment, the relationship between the weighted geometric mean value (?) of the work functions of the stable compounds and the wire diameter (D) of the flux-cored wire satisfies the following formula: {1.00????0.0908D2+0.5473D+1.547}.
    Type: Application
    Filed: May 1, 2020
    Publication date: June 23, 2022
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Naoki MUKAI, Shun IZUTANI
  • Publication number: 20210016386
    Abstract: A welding device for gas shielded arc welding includes: a portable welding robot mounted with a welding torch including a nozzle that guides jetting of shielding gas and a contact tip that performs energization on a consumable electrode; a feeding device that supplies the consumable electrode to the welding torch; a welding power source that supplies electric power to the consumable electrode via the contact tip; a gas supply source that supplies the shielding gas to be jetted from a nozzle end; and a control device that controls the portable welding robot. When the welding torch is seen from a side of jetting of the shielding gas, the contact tip is placed in an inside of an opening of the nozzle, the nozzle and the contact tip have a relatively movable structure, and an inner diameter of the nozzle end is within a range of 10-20 mm.
    Type: Application
    Filed: March 13, 2019
    Publication date: January 21, 2021
    Applicants: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), KOBELCO ROBOTiX Co., Ltd.
    Inventors: Takashi YASHIMA, Masahiro YOKOTA, Shun IZUTANI, Hirofumi KAWASAKI, Shinobu TODA
  • Patent number: 10843285
    Abstract: A welding device for welding a workpiece using a welding robot includes a welding control device that controls operation of the welding robot and a preheating device that preheats the workpiece. The welding control device includes an input unit through which at least one or both of dimensions of the workpiece and a shape of a welding joint, and preheating information are inputted, and a storage unit that includes at least welding robot operation orbit teaching data, welding condition data, and preheating condition data. The welding control device automatically provides a preheating condition, a welding robot operation orbit, and a welding condition for the welding joint to be welded, and preheating and welding are performed.
    Type: Grant
    Filed: July 18, 2017
    Date of Patent: November 24, 2020
    Assignee: Kobe Steel, Ltd.
    Inventors: Hirohisa Kishikawa, Shun Izutani, Shigeto Takada, Hiroshi Matsumura
  • Patent number: 10843286
    Abstract: A welding device for automatically welding a workpiece by a welding robot using a welding wire includes a welding control device that controls operation and welding work of the welding robot. The welding control device includes a sensing unit configured to detect a position of the workpiece, a root gap calculating unit configured to determine a root gap, and a storage unit including wire melting information as a database of a proper welding current corresponding to a feeding rate for each of the welding wire. A lamination pattern and a welding condition are provided in accordance with the root gap determined by the root gap calculating unit and the wire melting information so that an amount of heat input is equal to or less than a predetermined amount of heat input.
    Type: Grant
    Filed: July 18, 2017
    Date of Patent: November 24, 2020
    Assignee: Kobe Steel, Ltd.
    Inventors: Hirohisa Kishikawa, Hiroshi Matsumura, Shigeto Takada, Kenji Sadahiro, Shun Izutani
  • Publication number: 20190270157
    Abstract: A welding device for automatically welding a workpiece by a welding robot using a welding wire includes a welding control device that controls operation and welding work of the welding robot. The welding control device includes a sensing unit configured to detect a position of the workpiece, a root gap calculating unit configured to determine a root gap, and a storage unit including wire melting information as a database of a proper welding current corresponding to a feeding rate for each of the welding wire. A lamination pattern and a welding condition are provided in accordance with the root gap determined by the root gap calculating unit and the wire melting information so that an amount of heat input is equal to or less than a predetermined amount of heat input.
    Type: Application
    Filed: July 18, 2017
    Publication date: September 5, 2019
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Hirohisa KISHIKAWA, Hiroshi MATSUMURA, Shigeto TAKADA, Kenji SADAHIRO, Shun IZUTANI
  • Publication number: 20190262928
    Abstract: A welding device for welding a workpiece using a welding robot includes a welding control device that controls operation of the welding robot and a preheating device that preheats the workpiece. The welding control device includes an input unit through which at least one or both of dimensions of the workpiece and a shape of a welding joint, and preheating information are inputted, and a storage unit that includes at least welding robot operation orbit teaching data, welding condition data, and preheating condition data. The welding control device automatically provides a preheating condition, a welding robot operation orbit, and a welding condition for the welding joint to be welded, and preheating and welding are performed.
    Type: Application
    Filed: July 18, 2017
    Publication date: August 29, 2019
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Hirohisa KISHIKAWA, Shun IZUTANI, Shigeto TAKADA, Hiroshi MATSUMURA
  • Patent number: 9616528
    Abstract: A solid wire is for gas-shielded arc welding, using a shielding gas, and for galvanized steel sheet welding. The solid wire comprises, to the mass of the whole of the solid wire, predetermined amount of C, Si, Mn, P, S, O, and Cr, with the balance consisting Fe and inevitable impurities. The solid wire satisfies “1.0?(percentage by mass of Si+that by mass of Mn)/{100(that by mass of S+that by mass of O}?4.0” and “0.50?percentage by mass of Mn/that by mass of Si?2.00”. The shielding gas is an Ar gas comprising 25 to 40% of CO2 gas. It is achieved to improve spatter-decreasing performance and pore-resisting performance (performance of restraining the generation of porosity defects, such as pits and blowholes).
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: April 11, 2017
    Assignees: Kobe Steel, Ltd., DAIHEN Corporation
    Inventors: Shun Izutani, Kei Yamazaki, Reiichi Suzuki, Keiichiro Yanagi, Yuji Ueda, Kazuki Nakamura, Toshiro Uezono
  • Patent number: 9533368
    Abstract: There is provided a flux-cored wire containing flux within a stainless steel or mild steel outer cover for use in stainless steel welding and gas-shielded arc welding using a shielding gas. The flux-cored wire contains, based on the total mass of the flux-cored wire, predetermined amounts of C, Si, Mn, P, S, Cr, Ti, and O. The remainder are Fe and incidental impurities. The shielding gas is pure Ar gas.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: January 3, 2017
    Assignee: Kobe Steel, Ltd.
    Inventors: Minoru Miyata, Reiichi Suzuki, Shun Izutani
  • Patent number: 8950047
    Abstract: A welding tip replacement apparatus is used for a welding torch that includes a tubular tip connection body, a tubular retaining member fitted over the tip connection body, and a tubular welding tip fitted within the tip connection body, the welding torch being configured such that displacing the retaining member toward the proximal end of the tip connection body along the axis of the tip connection body causes the welding tip axially fastened to the tip connection body to be released. The apparatus includes a first grasping mechanism grasping the retaining member, a second grasping mechanism grasping the welding tip protruding from the retaining member in a direction away from the distal end of the tip connection body, a first driving mechanism driving the first grasping mechanism axially, and a second driving mechanism driving the second grasping mechanism axially.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: February 10, 2015
    Assignee: Kobe Steel, Ltd.
    Inventors: Shun Izutani, Reiichi Suzuki
  • Publication number: 20150027995
    Abstract: A solid wire is for gas-shielded arc welding, using a shielding gas, and for galvanized steel sheet welding. The solid wire comprises, to the mass of the whole of the solid wire, predetermined amount of C, Si, Mn, P, S, O, and Cr, with the balance consisting Fe and inevitable impurities. The solid wire satisfies “1.0?(percentage by mass of Si+that by mass of Mn)/{100(that by mass of S+that by mass of O}?4.0” and “0.50?percentage by mass of Mn/that by mass of Si?2.00”. The shielding gas is an Ar gas comprising 25 to 40% of CO2 gas. It is achieved to improve spatter-decreasing performance and pore-resisting performance (performance of restraining the generation of porosity defects, such as pits and blowholes).
    Type: Application
    Filed: February 28, 2013
    Publication date: January 29, 2015
    Applicants: DAIHEN Corporation, KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.)
    Inventors: Shun Izutani, Kei Yamazaki, Reiichi Suzuki, Keiichiro Yanagi, Yuji Ueda, Kazuki Nakamura, Toshiro Uezono
  • Publication number: 20130008003
    Abstract: A welding tip replacement apparatus is used for a welding torch that includes a tubular tip connection body, a tubular retaining member fitted over the tip connection body, and a tubular welding tip fitted within the tip connection body, the welding torch being configured such that displacing the retaining member toward the proximal end of the tip connection body along the axis of the tip connection body causes the welding tip axially fastened to the tip connection body to be released. The apparatus includes a first grasping mechanism grasping the retaining member, a second grasping mechanism grasping the welding tip protruding from the retaining member in a direction away from the distal end of the tip connection body, a first driving mechanism driving the first grasping mechanism axially, and a second driving mechanism driving the second grasping mechanism axially.
    Type: Application
    Filed: June 19, 2012
    Publication date: January 10, 2013
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Shun Izutani, Reiichi Suzuki
  • Patent number: 8343419
    Abstract: An object of the present invention is to provide a Ni base alloy solid wire for welding, which has excellent cracking resistance to ductility dip cracking in weld metal, can increase the tensile strength of the weld metal to not less than the tensile strength of the base material, and has excellent weldability. The present invention provides a solid wire which has a composition containing Cr: 27.0 to 31.5 mass %, Ti: 0.50 to 0.90 mass %, Nb: 0.40 to 0.70 mass %, Ta: 0.10 to 0.30 mass %, C: 0.010 to 0.030 mass %, and Fe: 5.0 to 11.0 mass %, and is regulated to Al: 0.10 mass % or less, N: 0.020 mass % or less, Zr 0.005 mass % or less, P:0.010 mass % or less, S: 0.0050 mass % or less, Si: 0.50 mass % or less, and Mn: 1.00 mass % or less, with the balance including Ni and inevitable impurities.
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: January 1, 2013
    Assignee: Kobe Steel, Ltd.
    Inventors: Tetsunao Ikeda, Masaki Shimamoto, Shun Izutani, Hiroaki Kawamoto, Yushi Sawada, Hirohisa Watanabe
  • Publication number: 20120125903
    Abstract: A welding torch includes a tip connection body, a holding member, a fixing member, and a welding tip. The holding member is displaceable in the axial direction of the tip connection. The fixing member fixes the welding tip in place in the axial direction of the welding tip when the fixing member is in contact with a smaller diameter portion, and the fixing member releases the welding tip when the fixing member is in contact with a larger diameter portion.
    Type: Application
    Filed: October 26, 2011
    Publication date: May 24, 2012
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd)
    Inventors: Shun Izutani, Reiichi Suzuki
  • Publication number: 20120118936
    Abstract: An object of the present invention is to provide a Ni base alloy solid wire for welding, which has excellent cracking resistance to ductility dip cracking in weld metal, can increase the tensile strength of the weld metal to not less than the tensile strength of the base material, and has excellent weldability. The present invention provides a solid wire which has a composition containing Cr: 27.0 to 31.5 mass %, Ti: 0.50 to 0.90 mass %, Nb: 0.40 to 0.70 mass %, Ta: 0.10 to 0.30 mass %, C: 0.010 to 0.030 mass %, and Fe: 5.0 to 11.0 mass %, and is regulated to Al: 0.10 mass % or less, N: 0.020 mass % or less, Zr 0.005 mass % or less, P:0.010 mass % or less, S: 0.0050 mass % or less, Si: 0.50 mass % or less, and Mn: 1.00 mass % or less, with the balance including Ni and inevitable impurities.
    Type: Application
    Filed: February 8, 2011
    Publication date: May 17, 2012
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Tetsunao IKEDA, Masaki Shimamoto, Shun Izutani, Hiroaki Kawamoto, Yushi Sawada, Hirohisa Watanabe
  • Publication number: 20120055903
    Abstract: To provide a flux-cored welding wire and a method for arc overlay welding attaining excellent weldability and low dilution ratio and obtaining a weld bead excellent in corrosion resistance in overlay welding using the flux-cored welding wire having an advantage of high deposition rate and deposition efficiency. The flux-cored welding wire for gas shielded arc welding including flux filled up in an outer sheath and using pure Ar as a shielding gas contains, as percentage to the total mass of the flux-cored welding wire, C: 0.20 mass % or below, Si: 15.00 mass % or below, Mn: 20.00 mass % or below, P: 0.0500 mass % or below, S: 0.0500 mass % or below, and Cr: 15.0-50.0 mass %, with the remainder being Fe and inevitable impurities.
    Type: Application
    Filed: March 23, 2011
    Publication date: March 8, 2012
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Shun Izutani, Reiichi Suzuki, Yushi Sawada, Hirohisa Watanabe