Patents Assigned to Kobe Steel, Ltd.
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Publication number: 20240133013Abstract: A method for manufacturing a hot-dip galvanized steel sheet having a high Si content and good plating adhesion. The method for manufacturing a hot-dip galvanized steel sheet includes the following: hot-rolling a steel raw material having a Si content of 1.0 mass % or more and coiling a steel sheet at 500° C. to 700° C.; subjecting a surface of the steel sheet after the coiling to an oxidation treatment at a heating temperature of a steel sheet temperature of 750° C. or lower, and subsequently subjecting the surface to a reduction treatment; and subjecting the steel sheet after the reduction treatment to a hot-dip galvanizing treatment to form a Zn-plated layer on a surface of the steel sheet.Type: ApplicationFiled: March 2, 2022Publication date: April 25, 2024Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.)Inventors: Akira KAWAKAMI, Hiroo SHIGE, Hiroshi IRIE, Takayuki MAEDA, Hang YU
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Publication number: 20240131608Abstract: A deposition planning method for an additively manufactured object includes: acquiring shape data; determining a welding path of each layer by slicing a three-dimensional shape of the additively manufactured object into layers; classifying a plurality of welding paths into intersection region paths and constant region paths; dividing the intersection region paths into a lower layer path and an upper layer path of an intersection portion; and determining welding conditions of the intersection region paths such that an upper layer deposit amount is more than a lower layer deposit amount, a sum of the upper layer deposit amount and the lower layer deposit amount is equal to a deposit amount in the constant region paths, and in a cross-section orthogonal to a longitudinal direction of the weld beads formed along the upper layer path, profiles of the weld beads adjacent to each other overlap each other.Type: ApplicationFiled: January 28, 2022Publication date: April 25, 2024Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventor: Shuo HUANG
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Publication number: 20240124956Abstract: A TiAl alloy material containing: Al: 42.0 atomic % or more and 44.0 atomic % or less; Cu: 0.5 atomic % or more and 2.5 atomic % or less; and Nb: 3.0 atomic % or more and 7.0 atomic % or less, with the balance being Ti and unavoidable impurities, and lamellar grains have an average grain size of 20 ?m or more and 200 ?m or less.Type: ApplicationFiled: October 10, 2023Publication date: April 18, 2024Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.), TOKYO INSTITUTE OF TECHNOLOGYInventors: Takeo MIYAMURA, Masao TAKEYAMA, Hirotoyo NAKASHIMA
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Patent number: 11958139Abstract: A flux-cored wire for gas shielded arc welding may contain, based on total mass of the wire: Fe: 78 mass % or more; TiO2: 4 mass % to 13 mass %; Mn: 1.0 mass % to 2.4 mass %; Cr: 1.0 mass % to 3.0 mass %; Mo: 0.2 mass % to 1.2 mass %; Si: 0.1 mass % to 0.8 mass %; Mg: 0.1 mass % to 1.0 mass %; fluoride (F conversion value): 0.05 mass % to 0.25 mass %; C: 0.01 mass % to 0.10 mass %; V: 0.003 mass % to 0.020 mass %; Nb: 0.003 mass % to 0.020 mass %; and B: less than 100 ppm (including 0 ppm). The contents of Mn, C, and V based on total mass of the wire may satisfy a relationship of 28×Mn/(390×C+2370×V)?0.82.Type: GrantFiled: January 16, 2019Date of Patent: April 16, 2024Assignee: Kobe Steel, Ltd.Inventor: Yoshimasa Muranishi
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Patent number: 11958145Abstract: 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: GrantFiled: March 13, 2019Date of Patent: April 16, 2024Assignees: Kobe Steel, Ltd., KOBELCO ROBOTiX Co., Ltd.Inventors: Takashi Yashima, Masahiro Yokota, Shun Izutani, Hirofumi Kawasaki, Shinobu Toda
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Patent number: 11952941Abstract: A CAES power generation device includes: a compressor/expander combined machine that is of displacement type and has a function as a compressor for compressing air and a function as an expander for expanding compressed air; a motor/generator combined machine that is mechanically connected to the compressor/expander combined machine and has a function as an electric motor for driving the compressor/expander combined machine and a function as a generator driven by the compressor/expander combined machine; and a pressure accumulation tank that is fluidly connected to the compressor/expander combined machine and stores compressed air generated by the compressor/expander combined machine.Type: GrantFiled: March 24, 2020Date of Patent: April 9, 2024Assignee: KOBE STEEL, LTD.Inventor: Masaki Matsukuma
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Patent number: 11945031Abstract: A method for manufacturing an additively-manufactured object in which deposition is performed by melting and solidifying a metal depending on three-dimensional shape data of a target shape, includes: acquiring the three-dimensional shape data; creating a deposition plan in which a formation track and a heating condition of the metal are determined; determining a difference between a shape of the additively-manufactured object that thermally contracts by cooling after deposition and a shape of the three-dimensional shape data by an operation; modifying the deposition plan until the difference falls within a predetermined allowable range; and additively manufacturing the additively-manufactured object based on the deposition plan in which the difference falls within the allowable range.Type: GrantFiled: May 31, 2019Date of Patent: April 2, 2024Assignee: KOBE STEEL, LTD.Inventors: Takemasa Yamasaki, Tatsuya Fujii, Shinji Sato, Takeshi Yamada
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Patent number: 11944944Abstract: A mixing apparatus includes a mixer configured to mix a material including a rubber or a resin in the presence of a working fluid that is in a supercritical state or a subcritical state. The mixer includes a chamber that forms a flow passage for the working fluid and the material, and a mixing blade disposed in the chamber and fixed to the chamber.Type: GrantFiled: October 24, 2018Date of Patent: April 2, 2024Assignee: Kobe Steel, Ltd.Inventors: Kosuke Higashi, Kazuhisa Fukutani
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Patent number: 11945056Abstract: A gas shielded arc welding wire contains, based on total mass of the wire in terms of mass %: C: 0.01% to 0.50%; Si: 0.01% to 1.50%; Mn: 0.10% to 2.50%; Cr: 5% to 15%; Ni: 0.05% to 1.50%; Mo: 0.1% to 2.0%; V: 0.1% to 1.0%; Nb: 0.01% to 0.20%; REM: 0.001% to 0.050%; S: 0.0010% to 0.0200%; and O: 0.025% or less (including 0%), which satisfies the following relationship: 3.0?(Nb+10×REM)/(S+O)?200.0.Type: GrantFiled: November 29, 2018Date of Patent: April 2, 2024Assignee: Kobe Steel, Ltd.Inventors: Kazuya Ikai, Tetsunao Ikeda
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Patent number: 11946580Abstract: A joined body includes a tubular first member, and a second member including a plate-shaped wall portion in which a through-hole is formed, the first member being inserted into the through-hole. The collar member is interposed between the first member and the second member in at least a part of the hole peripheral wall of the through-hole. The first member and the second member are joined by expanding the first member at a portion corresponding to the through-hole.Type: GrantFiled: July 16, 2020Date of Patent: April 2, 2024Assignee: KOBE STEEL, LTD.Inventors: Yasuhiro Maeda, Toru Hashimura, Taiki Yamakawa
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Publication number: 20240102798Abstract: A deformation prediction method for an additively manufactured object includes steps of dividing a shape of the additively manufactured object into a plurality of blocks, calculating deformation amount and deformation direction of each block before and after forming a weld bead by parallel processing of a plurality of threads based on the inherent strain method, setting at least one block group composed of blocks to be joined together among the plurality of blocks, and calculating deformation of an entirety of the block group by adding the deformation amount of each block composing the block group according to the deformation direction of the block.Type: ApplicationFiled: January 7, 2022Publication date: March 28, 2024Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventor: Shuo HUANG
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Publication number: 20240100919Abstract: A door beam includes an outer flange, an inner flange, and a pair of webs connecting the outer flange and the inner flange. The outer flange, the inner flange, and the pair of webs define a closed cross-sectional portion. The outer flange includes an outer central portion constituting the closed cross-sectional portion, and outer protruding portions protruding outward from the closed cross-sectional portion. The inner flange is formed with an attachment press working portion having been subjected to press working so as to serve as an attachment portion with respect to the inner panel at both end portions in the longitudinal direction. The outer protruding portion is formed with a mastic press working portion having been subjected to press working so as to serve as an attachment portion with respect to the outer panel.Type: ApplicationFiled: November 4, 2020Publication date: March 28, 2024Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Hideki ISHITOBI, Narikazu HASHIMOTO
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Publication number: 20240091885Abstract: A shape sensor is provided for acquiring a shape profile along an extension direction of an existing weld bead, and a control unit includes a welding information acquisition unit for acquiring welding information during formation of an adjacent weld bead when forming the adjacent weld bead at a position adjacent to the existing weld bead, and a defect candidate extraction unit for determining an angle characteristic portion having a base angle equal to or greater than a threshold in the existing weld bead based on the shape profile, determining a welding characteristic portion of the welding information based on the welding information, and extracting the welding characteristic portion corresponding to the angle characteristic portion as a defect candidate by associating the welding characteristic portion with the angle characteristic portion.Type: ApplicationFiled: January 7, 2022Publication date: March 21, 2024Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Yasuto KATAOKA, Eiichi TAMURA, Akinori YOSHIKAWA, Shuo HUANG, Shinji SATO
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Patent number: 11931830Abstract: A control method for gas-shielded arc welding includes providing a normal arc period in which the welding current is maintained at a setting current Icc set in advance, and providing a separation control period after the separation timing of the molten droplet is detected in the normal arc period, the separation control period including a current decreasing section, a current maintaining section, and a current increasing section. In the separation control period, at least one of the following controls for preventing a short circuit is performed: control of an output voltage, control of a feeding speed, and control of a gas ratio.Type: GrantFiled: March 8, 2019Date of Patent: March 19, 2024Assignee: Kobe Steel, Ltd.Inventors: Baini Jo, Shogo Nakatsukasa, Akira Ogawa, Eiji Sato
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Patent number: 11931709Abstract: The present invention relates to a mixing apparatus. A production unit produces a working fluid that is in a supercritical state or a subcritical state. A storage unit stores a material. A dissolving unit dissolves the material in the working fluid. A mixer mixes the material together in the presence of the working fluid. A material feed valve opens or closes a flow passage through which the material is to pass to be fed from the storage unit into the dissolving unit. A working fluid inflow valve opens or closes a flow passage through which the working fluid is to pass to flow into the dissolving unit from the production unit. A mixer inflow valve opens or closes a flow passage through which the working fluid and the material are to pass to flow into the mixer from the dissolving unit.Type: GrantFiled: October 24, 2018Date of Patent: March 19, 2024Assignee: KOBE STEEL, LTD.Inventors: Kosuke Higashi, Kazuhisa Fukutani
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Publication number: 20240083103Abstract: A fiber-reinforced resin strand used as a manufacturing material for a 3D printer, the fiber-reinforced resin strand containing: a base material containing a thermoplastic resin; and at least one fiber or fiber bundle disposed in the base material and extending in a strand-axial direction. Twisting is applied to the fiber or the fiber bundle along the strand-axial direction, and the number of times of the twisting per 1 m in length of the fiber-reinforced resin strand in the strand-axial direction is 30 or more and 80 or less.Type: ApplicationFiled: September 8, 2023Publication date: March 14, 2024Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Taka ANDO, Makoto TAKENAKA
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Publication number: 20240083024Abstract: A spring constant correction device and method measure a position and attitude of a distal end of an articulated robot when the articulated robot is operated in a state where elastic deformation is compensated, compare measurement values of the position and attitude of the distal end and target values of the position and attitude, and correct a spring constant based on a result of the comparison. In case of the correction, the spring constant is corrected at a predetermined position based on at least three of: an angle of an end point attitude based on the measured attitude; a torque of the distal end in the end point attitude; an angle of the distal end in a target attitude; and a torque of the distal end in the target attitude. A program of such a method is recorded in a recording medium.Type: ApplicationFiled: January 13, 2022Publication date: March 14, 2024Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Takashi YAMADA, Yoshiharu NISHIDA, Yoshihisa TAMASE, Naoki KIDA, Kenichiro KANAO
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Patent number: 11913088Abstract: The present invention provides a high-strength steel sheet, which can be used in various applications including automobile parts and exhibits excellent collision safety and excellent moldability, and a method for manufacturing the high-strength steel sheet. The high-strength steel sheet according to an aspect of the present invention satisfies a predetermined chemical composition and has a metallographic microstructure having ferrite fraction: 0% to 10%, MA fraction: 0% to 30%, hard phase other than ferrite and MA: 70% to 100% in terms of area proportion and retained austenite fraction: 5% to 30% in terms of volume proportion, and in the high-strength steel sheet, the skewness of IQ as analyzed by the EBRD method is ?1.2 to ?0.3 when the skewness is expressed by a predetermined relational expression in a case where crystal grains having a bcc structure and a bct structure are regarded as an aggregation of regions having an area of 0.05 ?m2.Type: GrantFiled: September 14, 2020Date of Patent: February 27, 2024Assignee: Kobe Steel, Ltd.Inventors: Tadao Murata, Muneaki Ikeda, Toshio Murakami
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Publication number: 20240051052Abstract: In a building step, a base measurement processing of acquiring a measured height by measuring, using a shape sensor, a height of a base at a position where a torch is to be moved when depositing weld beads; a welding condition setting processing of obtaining a planned height of the base at the position where the torch is to be moved from a deposition plan, comparing the measured height acquired in the base measurement processing and the planned height to obtain a differential height, and setting a welding condition in a feedback correction for reducing the differential height; and a correction ratio update processing of performing a selection from a plurality of correction ratios set in advance and updating a correction ratio in the welding condition based on a selected correction ratio are executed.Type: ApplicationFiled: December 15, 2021Publication date: February 15, 2024Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventor: Akinori YOSHIKAWA
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Patent number: 11897230Abstract: The present invention relates to a surface-treated metal sheet for polyolefin resin bonding having a metal substrate and an adhesive layer laminated on at least one surface of the metal substrate with a chemical conversion coating film interposed between the metal substrate and the adhesive layer. This surface-treated metal sheet for polyolefin resin bonding is characterized in that a coating liquid for forming the chemical conversion coating film contains an acid-modified polyolefin resin, a colloidal silica, and a silane coupling agent; a coating amount of the chemical conversion coating film is 0.05 to 3 g/m2 in terms of dry mass; the adhesive layer contains an acid-modified polyolefin resin; and the adhesive layer has a thickness of 5 to 100 ?m.Type: GrantFiled: March 3, 2017Date of Patent: February 13, 2024Assignee: Kobe Steel, Ltd.Inventors: Yasuo Hirano, Takeshi Watase, Tetsuya Yamamoto