Patents Assigned to PRIMETALS TECHNOLOGIES JAPAN, LTD.
  • Patent number: 11428408
    Abstract: A premix burner for combusting premixed gas containing fuel and air mixed in advance includes a plurality of combustion nozzles including a first nozzle having an ignition rod disposed therein and a second nozzle other than the first nozzle, a first premixed gas passage for supplying the premixed gas to the first nozzle, and a second premixed gas passage for supplying the premixed gas to the second nozzle. The first premixed gas passage and the second premixed gas passage are fluidically isolated from each other.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: August 30, 2022
    Assignee: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventor: Takanori Nagai
  • Publication number: 20220220619
    Abstract: A method for pickling a steel plate having a first steel plate portion and a second steel plate portion which is connected to a tail end of the first steel plate portion and which requires a longer time for pickling than the first steel plate portion when pickled under the same condition includes: a step of pickling the steel plate by immersing the steel plate in an acid solution in at least one pickling tank while conveying the steel plate; a step of circulating the acid solution, through a circulation line connected to any of the at least one pickling tank, between the pickling tank and an oxidizing device disposed in the circulation line; a step of oxidizing Fe2+ in the acid solution to Fe3+ by the oxidizing device using a gaseous oxidant; and a feeding start step of, upon switching from pickling of the first steel plate portion to pickling of the second steel plate portion, starting feeding of a liquid oxidant for oxidizing Fe2+ in the acid solution to Fe3+ to any of the at least one pickling tank or to t
    Type: Application
    Filed: January 9, 2020
    Publication date: July 14, 2022
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Kosei TSUJI, Ryusuke NAKATSUKA, Masashi YOSHIKAWA, Takuya HIRATA
  • Publication number: 20220154351
    Abstract: An acid solution preparation device is an acid solution preparation device for preparing an acid solution used for pickling of a steel plate, the device including a sealed tank for storing the acid solution, a gas supply part for supplying an oxygen-containing gas from outside of the sealed tank to the sealed tank, and a purge part for discharging a gas in the sealed tank to the outside.
    Type: Application
    Filed: March 22, 2019
    Publication date: May 19, 2022
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Kosei TSUJI, Ryusuke NAKATSUKA, Takahiro YAGI, Masashi YOSHIKAWA, Hideaki TAKATANI, Toyoaki YASUI, Takuya HIRATA
  • Patent number: 11286539
    Abstract: A cooling device for a metal plate includes a plurality of first nozzles and a plurality of second nozzles disposed on both sides of the metal plate, respectively, in a thickness direction of the metal plate across a pass line of the metal plate. The plurality of first nozzles form a staggered array in which a pitch in a width direction of the metal plate is Xn, a pitch in a longitudinal direction of the metal plate is Yn, and an offset amount in the width direction of a pair of first nozzles disposed adjacent to each other in the longitudinal direction is ?Xn. The plurality of second nozzles form a staggered array in which a pitch in the width direction is Xn, a pitch in the longitudinal direction is Yn, and an offset amount in the width direction of a pair of second nozzles disposed adjacent to each other in the longitudinal direction is ?Xn.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: March 29, 2022
    Assignee: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Takanori Nagai, Masashi Yoshikawa, Ryusuke Kimoto
  • Patent number: 11248288
    Abstract: When a portion for measuring the plating adhesion amount reaches an upstream side position, plating adhesion amount estimation values are calculated by using a plating adhesion amount estimation expression at positions away from a position that faces the distance sensors, that is, the upstream side position, by strip-width direction distances, of the surfaces of the steel strip. When the portion for measuring the plating adhesion amount reaches a downstream side position, the strip-width direction distances of the plating adhesion amount meters are matched to the strip-width direction distances, and the plating adhesion amount actual measurement values are obtained. The plating adhesion amount estimation expression is corrected on the basis of the differences between the plating adhesion amount estimation values and the plating adhesion amount actual measurement values. Accordingly, the control accuracy of the plating adhesion amount is improved.
    Type: Grant
    Filed: April 14, 2017
    Date of Patent: February 15, 2022
    Assignee: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Takashi Yonekura, Masao Tambara, Masashi Yoshikawa, Shinya Kanemori, Kazuki Yoshida
  • Patent number: 11247253
    Abstract: There are provided a work-side position measurement device and a drive-side position measurement device for directly measuring positions of roll chocks in a rolling direction, and positions of upper and lower working rolls and upper and lower backup rolls in the rolling direction are adjusted to zero point or predetermined positions. Alternatively, a change caused in the strip wedge due to a minute crossing of the axes of working rolls and backup rolls is calculated, and the quantities of leveling of a work-side rolling reduction cylinder device and a drive-side rolling reduction cylinder device are adjusted to make the strip edge equal to or smaller than a predetermined value. Accordingly, the bilateral asymmetry (strip wedge) of the thickness distribution of a rolled material is easily adjusted even in the event that the positions of the roll chocks in the rolling direction are changed due to wear on various components.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: February 15, 2022
    Assignee: Primetals Technologies Japan, Ltd.
    Inventors: Akira Sako, Jiro Hasai, Tadashi Hiura, Taroh Satoh, Toru Takeguchi, Hideaki Furumoto, Shinya Kanemori, Hideki Tonaka
  • Patent number: 11173528
    Abstract: Changing rolls in rolling equipment is performed more efficiently. For this purpose, a roll changing device (12) for changing a pair of top and bottom work rolls (21) provided in a rolling mill (11) for rolling a strip to be passed therethrough includes: a work roll holding unit (51) holding the pair of top and bottom work rolls (21) in an attachable/detachable manner and capable of moving the work rolls (21) in a threading direction; a roll holding device (31) including the work roll holding unit (51) and capable of moving in a roll axis direction relative to the rolling mill (11) in a state of holding the work rolls (21) by using the work roll holding unit (51); and a work roll transfer device (32) capable of moving in a direction intersecting with a moving path of the roll holding device (31) and capable of mounting the work rolls (21).
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: November 16, 2021
    Assignee: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Katsumi Fujii, Michimasa Takagi, Fumihisa Shimaya
  • Patent number: 11162177
    Abstract: To prevent over-pickling during pickling pause, shorten the time required to switch between pickling operation and pickling pause, and heat acid solution efficiently, a pickling device includes: a pickling tank for storing acid solution and for pickling a steel strip by allowing the steel strip to travel therethrough while the steel strip is immersed in the acid solution; a heat exchanger for heating the acid solution in the pickling tank; a circulation tank for storing the acid solution, provided separately from the pickling tank; an acid-solution circulation device configured to circulate the acid solution between the pickling tank and the circulation tank; a control device configured to withdraw the steel strip from the acid solution; and a guide plate disposed in the pickling tank and configured to guide the acid solution circulated in the pickling tank by the acid-solution circulation device to the heat exchanger.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: November 2, 2021
    Assignee: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Ryusuke Nakatsuka, Kosei Tsuji, Hideaki Suemori, Koichi Nakamura
  • Patent number: 11027363
    Abstract: An ironing plate is attached to a friction stir welding apparatus in such a manner that the ironing plate surrounds an outer peripheral portion of a rotating tool and does not rotate together with the rotating tool, an inside diameter of a portion of the ironing plate into which the rotating tool is inserted is larger than the diameter of the rotating tool, and a material inflow path through which an excessive material of two metallic plates flows in is formed between the ironing plate and the rotating tool when the ironing plate is disposed to surround the outer peripheral portion of the rotating tool.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: June 8, 2021
    Assignee: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Mitsuru Onose, Shinichi Kaga, Satoshi Hirano, Akihiro Satou
  • Publication number: 20210131664
    Abstract: A premix burner for combusting premixed gas containing fuel and air mixed in advance includes a plurality of combustion nozzles including a first nozzle having an ignition rod disposed therein and a second nozzle other than the first nozzle, a first premixed gas passage for supplying the premixed gas to the first nozzle, and a second premixed gas passage for supplying the premixed gas to the second nozzle. The first premixed gas passage and the second premixed gas passage are fluidically isolated from each other.
    Type: Application
    Filed: October 18, 2017
    Publication date: May 6, 2021
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventor: Takanori NAGAI
  • Publication number: 20210046582
    Abstract: A laser processing head includes a laser irradiation part, a collimating optical system for collimating laser light from the laser irradiation part, and a collecting optical system for collecting the laser light after passing through the collimating optical system. An optical system including the collimating optical system and the collecting optical system is configured such that the laser light after passing through the collecting optical system has coma aberration.
    Type: Application
    Filed: March 23, 2018
    Publication date: February 18, 2021
    Applicant: Primetals Technologies Japan, Ltd.
    Inventors: Takahiro YAGI, Hiroshi OISHI, Ryosuke MITSUOKA
  • Publication number: 20210018267
    Abstract: An operation support apparatus for a heat-treatment furnace for heat-treating a metal plate continuously includes a required time calculation unit configured to calculate, based on a current furnace temperature which is a current temperature of the heat-treatment furnace, a current line speed which is a current conveyance speed of the metal plate, and a target line speed which is a conveyance speed of the metal plate to be changed from the current line speed, an estimated required time until a temperature of the heat-treatment furnace reaches, from the current furnace temperature, a target furnace temperature which is a temperature of the heat-treatment furnace corresponding to the target line speed, and a first output unit configured to output the estimated required time calculated by the required time calculation unit.
    Type: Application
    Filed: March 23, 2018
    Publication date: January 21, 2021
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventor: Junichi YAMAMOTO
  • Publication number: 20210002774
    Abstract: A pickling facility includes: a pickling tank for storing an acid solution; a conveyance part for continuously conveying a steel plate immersed in the acid solution; a measurement part for measuring at least one parameter which has a correlation with a heat transfer coefficient between the acid solution and a reference surface disposed in the acid solution so as to face the steel plate; and a conveyance speed decision part configured to decide a conveyance speed of the steel plate conveyed by the conveyance part, on the basis of a measurement result of the at least one parameter.
    Type: Application
    Filed: April 16, 2018
    Publication date: January 7, 2021
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Kosei TSUJI, Ryusuke NAKATSUKA, Masashi YOSHIKAWA, Shinji NANBA
  • Publication number: 20200346264
    Abstract: A shape measurement device for a metal plate includes a plurality of distance sensors including one or more first sensors disposed on a first side and a plurality of second sensors disposed on a second side, of the metal plate with respect to a thickness direction of the metal plate, across a pass line of the metal plate. The one or more first sensors are positioned, with respect to a width direction of the metal plate, between a pair of second sensors disposed adjacent to each other in the width direction.
    Type: Application
    Filed: November 24, 2017
    Publication date: November 5, 2020
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Takashi YONEKURA, Masao TAMBARA, Masashi YOSHIKAWA
  • Patent number: 10815559
    Abstract: Provided are a molten metal plating facility and a method with which degradation in the surface quality of a strip can be prevented by preventing the adhesion of splashes.
    Type: Grant
    Filed: February 20, 2017
    Date of Patent: October 27, 2020
    Assignee: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Takashi Yonekura, Masao Tambara, Masashi Yoshikawa, Shinji Nanba
  • Patent number: 10807185
    Abstract: A welding apparatus including: a welding unit (20) that includes a pair of electrode wheels (21A, 21B) arranged to face each other with a welding object therebetween; a pressing unit (30) that includes a pair of press rolls (31A, 31B) that are arranged to face each other with the welding object therebetween and press a welded portion of the welding object welded by the electrode wheels (21A, 21B); a cooling unit (40) that supplies a cooling medium toward the welded portion pressed by the press rolls; a heating unit (50) that heats the welded portion cooled by the cooling unit (40); and a moving body (10) that supports the welding unit (20), the pressing unit (30), the cooling unit (40), and the heating unit (50), and reciprocates in a welding direction of the welding object.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: October 20, 2020
    Assignee: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Tatsuki Mitsuzumi, Ryosuke Mitsuoka, Takafumi Nakaya, Yujiro Watanabe, Hirotoshi Tagata, Ryusuke Kimoto
  • Patent number: 10792715
    Abstract: In a gear spindle, outer cylinder gear sections (11) are each integrally formed on an inner peripheral surface of a spindle outer cylinder and inner cylinder gear sections (14) are each integrally formed on an outer peripheral surface of a spindle inner cylinder (13). An oil seal (27) that seals in the lubricating oil (20) for each of the aforementioned gear sections includes, a seal body (29) having a channel-shaped cross section and interposed in the peripheral gap between the inner peripheral surface of the spindle outer cylinder and the outer peripheral surface of the spindle inner cylinder (13), and a seal mounting member (30) that includes a band, a spring, or the like that tightens and fixes the seal body to the outer peripheral surface of the spindle inner cylinder (13) to allow expansion of the seal body in the axial direction in the aforementioned peripheral gap.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: October 6, 2020
    Assignee: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventor: Kenji Yamamoto
  • Publication number: 20200261957
    Abstract: A warpage correction apparatus for a metal strip to be used in a continuous plating facility for the metal strip includes a sink roll disposed downstream of a fixed roll, configured to change the conveying direction of the metal strip, with respect to a conveying direction of the metal strip and inside a molten metal pot for plating, and a correction roll disposed between the fixed roll and the sink roll and configured to correct warpage of the metal strip. A ratio D3/D1 of a diameter D3 of the sink roll to a diameter D1 of the fixed roll is not less than 1.5.
    Type: Application
    Filed: November 30, 2017
    Publication date: August 20, 2020
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Takashi YONEKURA, Masao TAMBARA, Masashi YOSHIKAWA
  • Publication number: 20200238351
    Abstract: Changing rolls in rolling equipment is performed more efficiently. For this purpose, a roll changing device (12) for changing a pair of top and bottom work rolls (21) provided in a rolling mill (11) for rolling a strip to be passed therethrough includes: a work roll holding unit (51) holding the pair of top and bottom work rolls (21) in an attachable/detachable manner and capable of moving the work rolls (21) in a threading direction; a roll holding device (31) including the work roll holding unit (51) and capable of moving in a roll axis direction relative to the rolling mill (11) in a state of holding the work rolls (21) by using the work roll holding unit (51); and a work roll transfer device (32) capable of moving in a direction intersecting with a moving path of the roll holding device (31) and capable of mounting the work rolls (21).
    Type: Application
    Filed: June 16, 2017
    Publication date: July 30, 2020
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Katsumi Fujii, Michimasa Takagi, Fumihisa Shimaya
  • Patent number: 10711353
    Abstract: To prevent over-pickling of a steel strip during pickling pause, and shorten the time required to switch between pickling operation and pickling pause, a pickling device includes: a pickling tank for storing acid solution and for pickling a steel strip by allowing the steel strip to travel therethrough while the steel strip is immersed in the acid solution; a heat exchanger for heating the acid solution in the pickling tank; a circulation tank for storing the acid solution, provided separately from the pickling tank; an acid-solution circulation unit configured to circulate the acid solution between the pickling tank and the acid-solution storage tank; and a control device configured to control the acid-solution circulation device to maintain a liquid level of the acid solution in the pickling tank at a level below a traveling height of the steel strip.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: July 14, 2020
    Assignee: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Ryusuke Nakatsuka, Kosei Tsuji, Hideaki Suemori, Koichi Nakamura