Patents Assigned to Kabushiki Kaisha Kobe Seiko Sho
  • Publication number: 20210164618
    Abstract: A method for controlling a compression system that includes a compressor for compressing gas, a first on-off valve provided on a suction flow passage connected to a suction side of the compressor, a pressure reducing valve provided on a portion of the suction flow passage upstream of the first on-off valve, a second on-off valve provided on a discharge flow passage connected to a discharge side of the compressor, a bypass flow passage connecting the suction flow passage and the discharge flow passage to detour the compressor, and a bypass valve provided on the bypass flow passage, includes closing the first on-off valve while driving the compressor, opening the bypass valve simultaneously with or after the closing of the first on-off valve, closing the second on-off valve after the opening of the bypass valve, and continuing to drive the compressor after the closing of the second on-off valve.
    Type: Application
    Filed: October 14, 2020
    Publication date: June 3, 2021
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Koichiro HASHIMOTO, Masashi TAKANO, Takuro UBA, Takayuki FUKUDA, Kenji NAGURA
  • Publication number: 20210164089
    Abstract: Provided is a film formation method that includes: an etching step of etching the surface of the substrate by bringing inert gas ions into collision with the surface of the substrate, the inert gas ions generated in a chamber accommodating the substrate; an implantation step of bringing inert gas ions into collision with metal particles deposited on the surface of the substrate to thereby hit the metal particles into the surface of the substrate while bringing the inert gas ions into collision with a metal target to thereby cause the metal particles to sputter out of the metal target and depositing the metal particles on the surface of the substrate etched in the etching step; and a film formation step of forming the film on the surface of the substrate into which the metal particles have been hit in the implantation step.
    Type: Application
    Filed: October 3, 2018
    Publication date: June 3, 2021
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Satoshi HIROTA, Koichiro AKARI
  • Publication number: 20210154777
    Abstract: A solid wire for electroslag welding, including Fe and, by mass % based on a total mass of the wire: C: more than 0% and 0.03% or less; Si: more than 0% and 0.10% or less; Mn: more than 0% and 0.25% or less; Ni: 10.5%-14.0%; S: more than 0% and 0.010% or less; Al: more than 0% and 0.250% or less; REM: 0.002%-0.080%; and O: more than 0% and 0.0090% or less.
    Type: Application
    Filed: May 17, 2019
    Publication date: May 27, 2021
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Hidenori NAKO, Tomoko SUGIMURA, Keito ISHIZAKI, Yoshihiko KITAGAWA
  • Publication number: 20210154886
    Abstract: In kneading rotors, a twist angle of long wing constituting kneading wings is between 38 degrees and 53 degrees inclusive. The long wing includes, between the long wings and an inner surface of a casing, wing tops configured to form, along a wing longitudinal direction, a first tip clearance, and a second tip clearance narrower than the first tip clearance in width. A central angle of the long wing forming the second tip clearance is between 5 degrees and 10 degrees inclusive.
    Type: Application
    Filed: March 18, 2019
    Publication date: May 27, 2021
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Akira KONISHI, Yasuaki YAMANE, Naofumi KANEI
  • Publication number: 20210156371
    Abstract: A piston ring includes a first ring portion which is fitted onto an outer circumferential portion of a piston and which is capable of sliding relative to an inner wall surface of a cylinder, and a second ring portion which is fitted onto the outer circumferential portion of the piston, arranged side-by-side with the first ring portion in the axial direction, and which is capable of sliding relative to the inner wall surface of the cylinder. The second ring portion is fitted onto the outer circumferential portion of the piston in such a way as to be positioned on a side opposite to a compression chamber inside the cylinder, relative to the first ring portion, and has a greater hardness than the first ring portion has.
    Type: Application
    Filed: April 8, 2019
    Publication date: May 27, 2021
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Naofumi KANEI, Tomohiro OTSUKA, Hirotaka ITO, Hiroaki NII
  • Publication number: 20210156765
    Abstract: A rim replacing mechanism includes a pressing member including a spring and a body having a pressing surface applying downward pressing force to an upper surface of an upper rim, and an actuator configured to vertically displace the body within a range including an upper position and a lower position. As to the lower position, the body is configured to shift downward toward the lower position while the pressing surface of the body is applying the downward pressing force to the upper surface of the upper rim, to dispose the upper surface of the upper rim to be separated downward from a lower surface of an upper spindle. The spring is configured to apply downward pressing force to the body disposed at the lower position.
    Type: Application
    Filed: March 15, 2019
    Publication date: May 27, 2021
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Takashi SUMITANI, Yu SUMIMOTO
  • Publication number: 20210148492
    Abstract: Formed in series along an axial-direction end portion of a large-diameter pipe member, in the following order from the pipe end, are: a large-diameter-pipe pipe-end expanding portion; a large-diameter-pipe reduced-diameter portion; a large-diameter-pipe bulging portion; and a tapered portion. Formed in series along an axial-direction end portion of a small-diameter-pipe member, in the following order from the pipe end, are: a small-diameter-pipe pipe-end expanding portion; a small-diameter-pipe enlarged-diameter portion; and a small-diameter-pipe bulging portion.
    Type: Application
    Filed: July 5, 2018
    Publication date: May 20, 2021
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Yoshihaya IMAMURA, Chieko IMAI
  • Publication number: 20210138591
    Abstract: A wire for gas-shielded arc welding includes, based on a total mass of the wire: C: 0.01 mass % or more and 0.10 mass % or less, Si: 0.05 mass % or more and 0.55 mass % or less, Mn: 1.60 mass % or more and 2.40 mass % or less, Ti: 0.05 mass % or more and 0.25 mass % or less, Cu: 0.01 mass % or more and 0.30 mass % or less, S: 0.001 mass % or more and 0.020 mass % or less, N: 0.0045 mass % or more and 0.0150 mass % or less, Al: 0.10 mass % or less, and P: 0.025 mass % or less, with the remainder being Fe and inevitable impurities. In the wire, the following relationship is satisfied: 0.1?[Ti]/[Si]?3.0, where [Si] is the content of Si (mass %) and [Ti] is the content of Ti (mass %).
    Type: Application
    Filed: May 22, 2020
    Publication date: May 13, 2021
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Kazuya IKAI, Hikaru KINASHI, Yasuyuki YOKOTA
  • Publication number: 20210121843
    Abstract: Provided is a fluid treatment system, including: a plurality of fluid channel devices arranged in series along a regular channel; a plurality of flow control valves each adjusting the flow rate of a treatment target fluid flowing into each of the plurality of fluid channel devices; a flow control valve provided on the upstream side of the plurality of fluid channel device and operable to change the flow rate of the treatment target fluid flowing into each of the plurality of fluid channel device; a bypass channel allowing the treatment target fluid to flow so as to bypass the fluid channel device in which abnormality has occurred, and a plurality of bypass selector valves selectable between a state of allowing the flow of the treatment target fluid in the bypass channel and a state of blocking the flow.
    Type: Application
    Filed: July 9, 2019
    Publication date: April 29, 2021
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Akira MATSUOKA, Tsuyoshi KAKIO, Yuji KURISHIRO, Fumiaki SUZUKI
  • Publication number: 20210123213
    Abstract: A hydraulic drive apparatus capable of automatic control with high accuracy regardless of regeneration operation includes a boom flow rate control valve, an arm flow rate control valve, a regeneration control valve, a pump control device for performing horsepower control, a posture detection device, a boom flow rate control device switchable between a normal control mode and an automatic control mode, and a regeneration control device. The boom flow rate control device adjusts the boom flow rate in the automatic control mode so that a work attachment moves along a target locus. The regeneration control device sets the regeneration control valve to a regeneration position in a low load situation and to a regeneration cut position in a high load situation, and lowers the regeneration rate in the low load situation when the boom flow rate control device is switched to the automatic control mode.
    Type: Application
    Filed: April 22, 2019
    Publication date: April 29, 2021
    Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.), KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Satoshi MAEKAWA, Hiroaki KAWAI, Yusuke KAMIMURA
  • Publication number: 20210114112
    Abstract: A method for depositing an additively-manufactured object using three-dimensional shape data indicating a shape of the additively-manufactured object, includes: dividing the shape of the additively-manufactured object of the three-dimensional shape data, into a plurality of polygon faces; extracting a column of plural polygon faces and sequentially providing index numbers from a start polygon face; detecting a terminal polygon face based on directions of a pair of adjacent polygon faces; providing a bead formation ON flag to polygon faces other than the terminal polygon face, and a bead formation OFF flag to the terminal polygon face; producing a bead map in which the index numbers and the flags provided to the polygon faces are associated with one another; referring to the bead map to obtain a bead continuous formation pass; and continuously forming the bead along the bead continuous formation pass.
    Type: Application
    Filed: February 25, 2019
    Publication date: April 22, 2021
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Takemasa YAMASAKI, Tatsuya FUJII, Shinji SATO, Takeshi YAMADA
  • Publication number: 20210114148
    Abstract: A flux for submerged arc welding is a sintered flux and is for use in high speed welding. In the flux, the following relationships of contents in mass percent are satisfied: CaF2: 10.0% to 20.0%, MgO: 8.0% to 15.0%, a sum of Na2O and K2O: 2.1% to 3.5%, MnO: 1.5% to 5.0%, FeO: 0.5% to 5.0%, SiO2: 10.0% to 20.0%, Al2O3: 13.0% to 28.0%, and TiO2: 13.0% to 28.0%. In addition, the following relationships are further satisfied: 65?(MgO+SiO2+Al2O3+TiO2)?75, and 0.5?(Al2O3/TiO2)?2.0.
    Type: Application
    Filed: March 19, 2019
    Publication date: April 22, 2021
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Daisuke HATOMOTO, Munenobu SATO
  • Publication number: 20210115542
    Abstract: A high-strength steel sheet satisfies a predetermined chemical composition in which a content of martensite is 93% by volume or more, contents of ferrite, pearlite, and bainite are 2% by volume or less in total, and a content of retained austenite is 7% by volume or less, based on an entire metal structure, a number of laths in martensite measured by a cutting method in a total length of 300 ?m in an image of the metal structure observed under a scanning electron microscope is 240 or more, and a tensile strength of the high-strength steel sheet is 1470 MPa or more.
    Type: Application
    Filed: March 11, 2019
    Publication date: April 22, 2021
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Michitaka TSUNEZAWA, Michiharu NAKAYA, Haruka ARAKI
  • Publication number: 20210107081
    Abstract: 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: Application
    Filed: March 8, 2019
    Publication date: April 15, 2021
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Baini JO, Shogo NAKATSUKASA, Akira OGAWA, Eiji SATO
  • Publication number: 20210104912
    Abstract: A CAES power generation device includes a compression/expansion/combined machine, a pressure accumulation unit for storing compressed air, a low temperature water storage tank and a high temperature water storage tank, heat exchangers, and liquid maintaining units. The compression/expansion/combined machine has a function of compressing air using the electric power and a function of expanding the compressed air to generate electric power. The low temperature water storage tank and the high temperature water storage tank store liquid water and are fluidly connected to each other. The heat exchangers exchange heat between the compressed air and the water. The liquid maintaining units pressurize the water flowing through the heat exchangers and maintain the water in a liquid form.
    Type: Application
    Filed: January 18, 2019
    Publication date: April 8, 2021
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventor: Masaki MATSUKUMA
  • Publication number: 20210090771
    Abstract: Provided are a coil unit for electromagnetic forming capable of stably processing a plurality of portions in the longitudinal direction of a tubular member while preventing the contact between the tubular member and a conductor or the contact between the conductors even when the tubular member is long, and a method for producing a formed article using the coil unit. The coil unit for electromagnetic forming includes: a shaft core member made of a resin; a conductor having a wound portion, which is wound around the shaft core member, and a pair of conductor extension portions; an insulating support; and a resin coating layer formed on the outer peripheral surface of the wound portion. In the insulating support, a conductor holding portion for holding the conductor extension portions apart from each other is formed along the longitudinal direction.
    Type: Application
    Filed: July 12, 2018
    Publication date: March 25, 2021
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel
    Inventors: Yoshihaya IMAMURA, Takayoshi SUGISAKI, Chieko IMAI
  • Publication number: 20210080931
    Abstract: Using three-dimensional shape data, the shape of a blade, which is an additive manufacturing product, is divided into multiple layers according to the height of a bead. Each layer of the additive manufacturing product that has been divided into multiple layers is divided by fitting regions of a set shape. By determining connecting lines for connecting the divided regions to each other and computing the extension directions of protrusions, planned lines for bead formation along said extension directions are determined. The additive manufacturing product is shaped by forming beads along planned bead formation lines.
    Type: Application
    Filed: April 19, 2019
    Publication date: March 18, 2021
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Takemasa YAMASAKI, Tatsuya FUJII, Shinji SATO, Takeshi YAMADA
  • Publication number: 20210079507
    Abstract: When a T1-tempered aluminum alloy extrusion is subjected to plastic working and thus formed into a product, crack occurrence is prevented during plastic working, and tensile residual stress of the product is reduced to improve stress corrosion cracking resistance. A T1-tempered 7000-series aluminum alloy extrusion is heated to a temperature range of 150° C. or higher, and then subjected to plastic working within the temperature range, and then cooled, and then subjected to artificial temper aging. An integral value (F140) of (T(t)?140)2 is controlled to 5×105 (° C.2·s) or less in a section of t1?t?t2, where t is time (s) from heating start, T(t) is temperature (° C.) of the extrusion at time t, t1 is time before the extrusion reaches 140° C. in a heating step, and t2 is time before the extrusion reaches 140° C. again in a cooling step.
    Type: Application
    Filed: July 10, 2020
    Publication date: March 18, 2021
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventor: Hiroaki HOSOI
  • Publication number: 20210069836
    Abstract: 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: Application
    Filed: January 16, 2019
    Publication date: March 11, 2021
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventor: Yoshimasa MURANISHI
  • Publication number: 20210060640
    Abstract: A mixed powder for powder metallurgy according to an embodiment of the present invention contains an iron-based powder as a main component and further contains a powder of at least one sulfide selected from CaS, MnS, and MoS2; and a powder wherein a percentage content of magnesium oxide is greater than or equal to 0.005% by mass and less than or equal to 0.025% by mass, wherein the magnesium oxide has an average particle size D50 of greater than or equal to 0.5 ?m and less than or equal to 5.0 ?m.
    Type: Application
    Filed: December 17, 2018
    Publication date: March 4, 2021
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Masaki YOSHIDA, Yohei TAKAMATSU