And Regulating An Operation Patents (Class 164/452)
  • Patent number: 10315144
    Abstract: Air filter cartridges are disclosed. Also described are air cleaners including the filter cartridges. Methods of assembly and use are also provided. Also, systems of use are described.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: June 11, 2019
    Assignee: Donaldson Company, Inc.
    Inventors: Gregory Reichter, Wayne Bishop, Benny K. Nelson, Darrel Wegner, Bruce Crenshaw, Thomas Miller, Donald Mork, Kevin Schrage, Vladimir Kladnitsky, Richard Osendorf, Bradley Kuempel, Thomas Lundgren, Jordan Flagstad
  • Patent number: 10052684
    Abstract: A monitoring device (6) records variables that are characteristic of operating parameters of a continuous casting mold (1) for casting a metal strand (2). The monitoring device (6) records at least some of the characteristic variables by independently performing measurements during the casting of the metal strand (2). The monitoring device (6) forms groups (G1, G2) of operating parameters and independently tests whether the operating parameters of the respective group (G1, G2) satisfy a respective predetermined stability criterion. The monitoring device (6) accepts the operating parameters into a database (12). The monitoring device (6) determines those data records (11) contained in the database (12) that coincide in their input variables with the basic operating parameters and determines admissible operating parameter ranges for supplementary operating parameters.
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: August 21, 2018
    Assignee: PRIMETALS TECHNOLOGIES AUSTRIA GMBH
    Inventors: Oliver Lang, Christian Ortner, Martin Schuster
  • Patent number: 9773642
    Abstract: An electron beam melting furnace includes a hearth, a mold, an electron gun for keeping metal as a molten state, an electron beam controller for controlling direction of the electron beam, an image sensor for molten metal, and an operating device. A method for operating the furnace includes a step of inputting electron beam emitting coordinates in the electron beam controller, a step of emitting the electron beam, a step of detecting a high electron beam intensity spot by the image sensor, a step of calculating coordinates of high electron beam intensity based on the detected signal by the operating device, a step of calculating differences between the coordinates of emission and the coordinates of high electron beam intensity spot, a step of inputting the difference in the electron beam controller, and a step of controlling the location of electron beam spot.
    Type: Grant
    Filed: June 12, 2013
    Date of Patent: September 26, 2017
    Assignee: TOHO TITANIUM CO., LTD.
    Inventors: Takashi Oda, Hisamune Tanaka, Takeshi Shiraki
  • Patent number: 9511401
    Abstract: A control device for a rolling plant, which is capable of reducing the pouring amount of cooling water by pouring cooling water at timing of high cooling efficiency when a material being rolled is cooled, and thereby being capable of saving the energy consumption. The control device includes a plurality of rolling stands that are arranged in tandem on a rolling line to roll the material being rolled of a metallic material conveyed on the rolling line, and inter-stand cooling systems that are provided between the plurality of rolling stands to pour cooling water onto the conveyed material being rolled. The inter-stand cooling systems are configured so that the pouring amount of cooling water poured from the inter-stand cooling system positioned on the upstream side on the rolling line is larger, and the pouring amount of cooling water poured from the inter-stand cooling system positioned on the downstream side is smaller.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: December 6, 2016
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Hiroyuki Imanari, Kei Kubota
  • Patent number: 9289821
    Abstract: The apparatus for preventing damage to casting rolls includes: a roll pressing force detection unit measuring a roll pressing force applied to the casting rolls; a foreign object determination unit determining whether foreign objects have been introduced to the casting rolls based on the measured roll pressing force; a roll gap instruction value generation unit generating a roll gap instruction value by adding a preset roll gap amount to the set roll gap if it is determined that foreign objects have been introduced to the casting rolls; and a roll gap control unit controlling a roll gap between the casting rolls based on the roll gap instruction value. Therefore, surfaces of the casting rolls may be less damaged by foreign objects.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: March 22, 2016
    Assignee: POSCO
    Inventors: Dae-Sung Lee, Seong-In Jeong, Sang-Hoon Kim, Man-Jin Ha, Ji-Woo Im
  • Patent number: 9243312
    Abstract: There is provided an aluminum alloy casting consisting essentially of 7.0 to 11.5 mass % of Si, 0.9 to 4.0 mass % of Mg, 0.1 to 0.65 mass % of Fe, 0.1 to 0.8 mass % of Mn and the balance being Al and unavoidable impurities, or consisting essentially of 7.0 to 11.5 mass % of Si, 0.9 to 4.0 mass % of Mg, 0.1 to 0.65 mass % of Fe, 0.1 to 0.8 mass % of Mn, 0.3 to 1.0 mass % of Cu and the balance being Al and unavoidable impurities, and containing eutectic Si grains having an aspect ratio of 2.0 or smaller and an average grain size of 1.0 micrometer or smaller. There is also provided an automotive part formed with the aluminum alloy casting and a production method of the aluminum alloy casting.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: January 26, 2016
    Assignees: NISSAN MOTOR CO., LTD., NIPPON LIGHT METAL COMPANY, LTD.
    Inventors: Yusuke Nagaishi, Shigeyuki Nakagawa, Koji Itakura, Haruyasu Katto, Satoru Suzuki
  • Patent number: 9174272
    Abstract: There is provided a strip casting method using a twin roll strip casting process in which molten steel is supplied through an injection nozzle to a region between twin rolls rotating in opposite directions to produce a strip having a predetermined thickness and a high degree of edge quality. The twin roll strip casting method includes: performing the casting process by setting a casting thickness to have a minimal value during an early stage of the casting process in which edge bulging occurs; and performing the casting process by increasing the casting thickness to a maximum value after the molten steel reaches a pre-set target temperature as the casting process proceeds.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: November 3, 2015
    Assignee: POSCO
    Inventors: Oh-Seong Kweon, Suk-Kyun Hwang, Seong-In Jeong
  • Publication number: 20150000859
    Abstract: A method of and an apparatus for controlling a molten metal surface in a mold that are effective to various disturbances are provided. The method and the apparatus for controlling a molten metal surface level in a mold according to the present invention perform the following operations of: measuring the molten metal surface level in the mold of a continuous-casting machine; changing a reference position of oscillation of the mold based on the difference between a molten metal surface setting value set in advance as a desired value of the molten metal surface and a measured value of the molten metal surface level; and making the reference position of oscillation follow molten metal surface fluctuations.
    Type: Application
    Filed: October 11, 2012
    Publication date: January 1, 2015
    Applicant: JP STEEL PLANTECH CO.
    Inventors: Takeshi Sekiguchi, Shigeo Nakamura
  • Patent number: 8893768
    Abstract: A method of continuously casting metal strip having the steps of assembling a pair of counter-rotatable casting rolls, assembling a metal delivery system adapted to deliver molten metal above the nip to form a casting pool, the casting pool forming a meniscus with each casting surface of the casting rolls, delivering a shell thickness controlling gas to select areas within 300 mm of end portions of at least one casting roll downwardly toward the meniscus between the casting pool and the casting surface adapted to control thickness of the metal shell, and control attenuation of the casting roll, and sensing the temperature and thickness profiles of the cast strip downstream from the nip to determine high or low temperature areas of the cast strip within 300 mm of the end portions and causing the gas to be delivered to the high or low temperature areas to change the thickness of the metal shell.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: November 25, 2014
    Assignee: Nucor Corporation
    Inventors: Robert Nooning, Alan J. Deno, Mark Schlichting, Gary McQuillis, Dhiren Panda, Neal Ross, Leigh Woolley
  • Publication number: 20140299288
    Abstract: An arrangement for a continuous casting process. The arrangement includes a vessel having a first opening for receiving molten metal in the vessel, a second opening for discharging the molten metal from the vessel, and a body extending between the first opening and the second opening, a first magnetic arrangement attached to the body, the first magnetic arrangement having a magnetic core with legs, and coils arranged around the legs, and a power system configured to provide an alternating current superimposed on a carrier current to each of the coils, each pair of alternating current and carrier current provided to a coil forming a flow control current, wherein flow control currents provided to adjacent coils are phase shifted relative each other, thereby creating a travelling magnetic field in molten metal in the vessel. A corresponding method is also presented herein.
    Type: Application
    Filed: June 20, 2014
    Publication date: October 9, 2014
    Inventors: Jan-Erik Eriksson, Hongliang Yang, Boo Eriksson
  • Patent number: 8788084
    Abstract: The inflow of liquid metal into a continuous casting mold is set by a closure device. A measured actual meniscus value is fed to a controller determining a closure device target position on the basis of the actual and a corresponding target value. The measured actual value is fed to a disturbance variable compensator. The target position/corrected target position or a corresponding actual value are further fed to the disturbance variable compensator which determines the disturbance variable compensation value. The disturbance variable compensator has a model of the continuous casting mold for determining an expected value. A number of oscillating compensators determine a frequency disturbance proportion. The sum of the frequency disturbance proportions corresponds to the disturbance variable compensation value. The disturbance variable compensator has a jump determiner, by which it determines the jump compensation value by integrating the difference.
    Type: Grant
    Filed: May 6, 2010
    Date of Patent: July 22, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Martin Niemann, Bernhard Weisshaar
  • Publication number: 20140116639
    Abstract: Maintaining the shell surface temperature profile under transient conditions by spray water cooling in continuous casting of steel is often desired to reduce occurrence of surface cracks. For this purpose, a real-time spray-cooling control system is provided that includes one or more of: a virtual sensor for accurate estimation/prediction of shell surface temperature, control algorithm and data checking subroutines for robust temperature control, server and client programs for communicating between these software components and the caster, and a real-time monitor to display the predicted shell surface temperature profiles, water flow rates, and operating data, among other things.
    Type: Application
    Filed: January 3, 2014
    Publication date: May 1, 2014
    Applicant: Board of Trustees of the University of Illinois
    Inventors: Brian G. Thomas, Joseph Bentsman, Kai Zheng
  • Patent number: 8710474
    Abstract: An apparatus used with an external laser apparatus for generating extreme ultraviolet light includes a target storage unit for storing a target material, a nozzle unit having a through-hole in communication with the interior of the storage unit through which the target material is outputted, an electrode having a through-hole facing the nozzle unit, and a target detector for detecting a target formed of the target material and outputting a detection signal. A direct current voltage adjuster applies and adjusts a direct current between the target material and the electrode, a pressure adjuster applies and adjusts a pressure to the target material through gas, and a controller controls at least one of the direct current voltage adjuster and the pressure adjuster based on the detection signal from the target detector.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: April 29, 2014
    Assignee: Gigaphoton Inc.
    Inventors: Takeshi Kodama, Osamu Wakabayashi
  • Patent number: 8684068
    Abstract: An apparatus and method for controlling the horizontal oscillation of an edge dam of a twin roll strip caster is provided. The apparatus includes an oscillation unit which horizontally oscillates an oscillation plate in accordance with an oscillation waveform so that an edge dam refractory coupled to the oscillation plate horizontally oscillates, a servo valve which outputs the oscillation waveform to the oscillation unit, and a control unit which applies the oscillation waveform to the servo valve, thus controlling the horizontal oscillation of the oscillation unit. The amplitude, frequency and waveform of the oscillation are variably controlled depending on casting conditions. The edge dam horizontally oscillates, using the servo valve and a hydraulic cylinder, thus rapidly removing edge skull and suppressing the generation and growth of skull, thereby preventing a casting roll or edge dam from being damaged.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: April 1, 2014
    Assignee: Posco
    Inventors: Oh-Seong Kweon, Kwi-Ju Hwang, Yoon-Ha Kim, Ji-Woong Jun, Sang-Hoon Kim
  • Publication number: 20140072824
    Abstract: A method allows microalloyed tubular steel to be produced economically, with operational reliability and with high quality.
    Type: Application
    Filed: September 10, 2013
    Publication date: March 13, 2014
    Applicant: SIEMENS VAI METALS TECHNOLOGIES GMBH
    Inventors: Bernd LINZER, Axel RIMNAC
  • Patent number: 8651168
    Abstract: Maintaining the shell surface temperature profile under transient conditions by spray water cooling in continuous casting of steel is often desired to reduce occurrence of surface cracks. For this purpose, a real-time spray-cooling control system is provided that includes one or more of: a virtual sensor for accurate estimation/prediction of shell surface temperature, control algorithm and data checking subroutines for robust temperature control, server and client programs for communicating between these software components and the caster, and a real-time monitor to display the predicted shell surface temperature profiles, water flow rates, and operating data, among other things.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: February 18, 2014
    Assignee: Board of Trustees of the University of Illinois
    Inventors: Brian G. Thomas, Joseph Bentsman, Kai Zheng
  • Patent number: 8607847
    Abstract: A method of continuously casting thin strip dynamically controlling roll casting surface configuation by controlling the temperature of water flowing through the longitudinal water flow passages in a cyclindrical tube thickness of no more than 80 millimeters of counter rotated casting rolls, and varying the speed of the casting rolls with attenuation of the ends of the casting rolls with a casting roll drive system responsive to electrical signals received from sensors during a casting campaign.
    Type: Grant
    Filed: August 5, 2008
    Date of Patent: December 17, 2013
    Assignee: Nucor Corporation
    Inventors: Mark Schlichting, Walter N. Blejde, Mike Schueren, Rama Ballav Mahapatra
  • Patent number: 8607848
    Abstract: A method of continuously casting thin strip dynamically controlling roll casting surface configuration by controlling the temperature of water flowing through the longitudinal water flow passages in a cylindrical tube thickness of no more than 80 millimeters of counter rotated casting rolls, and varying the speed of the casting rolls with attenuation of the ends of the casting rolls with a casting roll drive system responsive to electrical signals received from sensors during a casting campaign.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: December 17, 2013
    Assignee: Nucor Corporation
    Inventors: Mark Schlichting, Walter N. Blejde, Mike Schueren, Rama Ballav Mahapatra
  • Publication number: 20130213599
    Abstract: A device and method are disclosed for positioning at least one of two casting rolls in a continuous casting process for producing a metal strip. The device and the method allow adjusting or modifying the casting gap between the casting rolls during the ongoing operation, thereby having an influence on the strip thickness and the strip profile of the produced metal strip.
    Type: Application
    Filed: September 28, 2011
    Publication date: August 22, 2013
    Inventor: Ansgar Grüss
  • Patent number: 8499821
    Abstract: A method for the detection and classification of surface defects on continuously cast products using topographical information about the appearance of continuously cast surface defects and/or flaws are determined with respect to their exact position, evaluated with respect to their location and dimensions, and eliminated in accordance with the evaluation prior to further machining of the product, or are prevented by optimizing the process. The defects and/or flaws on the slab surface of the continuously cast preliminary product are detected and are stored with respect to their exact position and a detection of defects and/or flaws on the finished product is carried out and stored with respect to their exact position, and in that the information from the preliminary product is then compared with the information from the surface inspection on the finished product.
    Type: Grant
    Filed: April 2, 2008
    Date of Patent: August 6, 2013
    Assignee: SMS Siemag AG
    Inventors: Dieter Rosenthal, Stephan Schulze, Ingo Schuster, Peter Sudau, Rainer Fackert, Andreas Weinert, Wilfried Schumacher
  • Publication number: 20130168037
    Abstract: A casting furnace for manufacturing a metal casting comprises an interior chamber and a secondary chamber through which the metal casting passes from the interior chamber into external atmosphere. A seal along the secondary chamber surrounds and seals against the metal casting to separate the interior chamber from the external atmosphere in a manner which allows for an extended period of continuous casting. A force producing mechanism may force the seal against the metal casting. Multiple seals may be used sequentially to increase the duration of the sealing capability and the continuous casting process. Inert gas sensors may detect loss of inert gas from the interior chamber.
    Type: Application
    Filed: February 26, 2013
    Publication date: July 4, 2013
    Applicant: RTI INTERNATIONAL METALS, INC.
    Inventor: RTI International Metals, Inc.
  • Publication number: 20130139992
    Abstract: A combined continuous casting and rolling system, a control device for such system, and a method for producing rolling stock, e.g., metal strip, using such system are disclosed. The combined continuous casting and rolling system may include a casting device for casting metal and a roll train having at least one roll stand for hot forming the rolling stock, wherein the system is operated such that the rolling stock extends continuously between the casting device and the roll train, wherein rolling stock is continually supplied to the roll train, and wherein a predetermined target thickness progression for the rolling stock is predetermined. Because the thickness progression has at least two different target thicknesses for different sections in the longitudinal direction of the rolling stock and the thickness progression is designed such that particular target thicknesses are set at least twice, longitudinally profiled rolling stock may be produced relatively inexpensively.
    Type: Application
    Filed: July 28, 2011
    Publication date: June 6, 2013
    Inventor: Günther Winter
  • Publication number: 20130126120
    Abstract: A method of continuously casting metal strip having the steps of assembling a pair of counter-rotatable casting rolls, assembling a metal delivery system adapted to deliver molten metal above the nip to form a casting pool, the casting pool forming a meniscus with each casting surface of the casting rolls, delivering a shell thickness controlling gas to select areas within 300 mm of end portions of at least one casting roll downwardly toward the meniscus between the casting pool and the casting surface adapted to control thickness of the metal shell, and control attenuation of the casting roll, and sensing the temperature and thickness profiles of the cast strip downstream from the nip to determine high or low temperature areas of the cast strip within 300 mm of the end portions and causing the gas to be delivered to the high or low temperature areas to change the thickness of the metal shell.
    Type: Application
    Filed: November 19, 2012
    Publication date: May 23, 2013
    Applicant: NUCOR CORPORATION
    Inventor: NUCOR CORPORATION
  • Patent number: 8418748
    Abstract: An exemplary embodiment of the invention provides a method of direct chill casting a composite metal ingot. The method involves sequentially casting two or more metal layers to form a composite ingot by supplying streams of molten metal to two or more casting chambers within a casting mold of a direct chill casting apparatus. Inlet temperatures of one or more of the streams of molten metal are monitored at a position adjacent to an inlet of a casting chamber fed with the stream, and the inlet temperatures are compared with a predetermined set temperature for the stream to determine if there is any difference. A casting variable that affects molten metal temperatures entering or within the casting chambers (e.g. casting speed) is then adjusted by an amount based on the difference of the compared temperatures to eliminate adverse casting effects caused by the difference of the inlet temperature and the set temperature.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: April 16, 2013
    Assignee: Novelis Inc.
    Inventors: Robert Bruce Wagstaff, Aaron David Sinden, Todd F. Bischoff, Eric Ball, Jeff McDermott
  • Publication number: 20130081777
    Abstract: A system for monitoring the consumption of mold flux in a continuous casting apparatus including a transfer apparatus for transferring mold flux from a bulk source to an intermediate hopper; a feed control apparatus for controlling the transfer of mold flux from the transfer apparatus to the intermediate hopper, the feed control apparatus including at least one load cell for weighing the intermediate hopper and the mold flux within the intermediate hopper over a period of time, the feed control apparatus further including a controller receiving input from the at least one load cell and for controlling the operation of the transfer apparatus based on the input; and a delivery apparatus for receiving mold flux from the intermediate hopper and delivering the mold flux to a mold, the delivery apparatus pneumatically feeding the mold flux to the mold.
    Type: Application
    Filed: October 1, 2012
    Publication date: April 4, 2013
    Applicant: STOLLBERG, INC.
    Inventor: STOLLBERG, INC.
  • Patent number: 8408280
    Abstract: A continuous casting mold with a bleedout detection system is disclosed, which may include a casting mold framework, a molten metal casting mold with a mold inlet and a mold outlet, the mold outlet having a mold cavity perimeter; and a bleedout detection system which may include: a signal generator that provides a balanced current to a sensor/conductor at or near the mold outlet perimeter; a current detector electrically connected to the sensor/conductor; and a programmable controller configured to receive an electrical signal from the bleedout detection system regarding the status of the sensor/conductor.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: April 2, 2013
    Assignee: Wagstaff, Inc.
    Inventors: Jacob Kerbs, David A. Salee
  • Patent number: 8327918
    Abstract: A method of fabricating a steel strip (1) including a) providing a functional relationship in a machine controller (8) between a slab casting speed (v) or the mass flow as a product of casting speed and strip thickness or as a product of strip speed and strip thickness and the strip temperature (t) downstream of the last rolling stand (7) for a different number (n) of active rolling stands (7) and different final thicknesses, b) determining or specifying the casting speed (v) or the mass flow (v×H) and feeding the determined value into the machine controller (8), and c) determining the optimum number of active rolling stands (7) and the final thicknesses and thickness reductions which can be rolled with them in the rolling train using the functional profiles.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: December 11, 2012
    Assignee: SMS Seimag AG
    Inventors: Juergen Seidel, Ernst Windhaus, Markus Reifferscheid, Juergen Mueller
  • Patent number: 8312917
    Abstract: A method of controlling the formation of crocodile skin surface roughness on thin cast strip by forming a casting pool of molten metal of less than 0.065% carbon supported on casting surfaces above a nip, assembling a rotating brush to contact the casting surfaces in advance of contact with the molten metal, and controlling the energy exerted by rotating brushes against the casting surfaces of the casting rolls to clean and expose a majority of the projections of the casting surfaces of the casting rolls by providing wetting contact with the molten metal of the casting pool. The cleaning step is controlled by controlling the energy of the rotating brush against the casting rolls based on the difference between the detected light reflected from the casting surfaces and the light reflected when the casting surfaces are clean, and automating the method.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: November 20, 2012
    Assignee: Nucor Corporation
    Inventor: Mark Schlichting
  • Patent number: 8251127
    Abstract: An apparatus for casting metal strip includes a pair of counter-rotatable casting rolls having casting surfaces laterally positioned to form a nip therebetween through which cast strip can be cast, and on which a casting pool of molten metal can be formed supported on the casting surfaces above the nip, a pair of molten metal delivery nozzles disposed above the nip and capable of discharging molten metal to form the casting pool supported on the casting rolls, a pair of side dams adjacent ends of the pair of casting rolls capable of confining the casting pool, a pair of delivery nozzle actuators capable of positioning the delivery nozzles independently of the side dams and a pair of side dam actuators capable of positioning the side dams independently of the delivery nozzles during casting, and a control system capable of controlling desired distance between the delivery nozzles and the side dams.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: August 28, 2012
    Assignee: Nucor Corporation
    Inventors: Jay Jon Ondrovic, Eric Fulbright, Katsumi Nakayama
  • Patent number: 8220526
    Abstract: A method for continuous and efficient casting roll of magnesium alloy plates including providing plural induction furnaces, resistance furnace, casting roll and rollers; adding metal elements into the induction furnaces, the metal elements comprising Mg ingots or Mg alloy, the metal elements being smelted in the induction furnaces and then flow into the resistance furnace; controlling temperature of the Mg melt in the resistance furnace, wherein there are at least two temperature controlling areas communicated with each other, and a difference of temperatures is constant; transferring the Mg melt into biting area through a transferring pipe and modeling the mg melt into Mg plate, the temperature of the Mg melt into the biting area being 690±10° C.; Rolling the Mg plate in the rollers and each band of the rollers having a working temperature 250˜350° C., and the difference of temperature is ±10° C.
    Type: Grant
    Filed: May 10, 2010
    Date of Patent: July 17, 2012
    Assignee: Shenzhen Sunxing Light Alloys Materials Co., Ltd.
    Inventors: Xuemin Chen, Qingdong Ye, Jianguo Li, Chaowen Liu, Yueming Yu
  • Patent number: 8220525
    Abstract: Disclosed is a method of predicting surface quality of a thin slab hot rolled coil. The method includes calculating the Cu equivalent (Cu eq.) of molten steel, applying the calculated Cu equivalent of the molten steel into an equation: 120×(Cu equivalent)2?6×(Cu equivalent) to calculate a surface crack index, and predicting the generation of surface defect of the thin slab hot rolled coil by the surface crack index. A method of producing the thin slab hot rolled coil using the same is also provided. The surface crack defect of the thin slab hot rolled coil can be predicted by calculating the Cu equivalent of the molten steel, and thus a thin slab which meets the quality standard demanded by a consumer can be provided, and this results in increased productivity and product reliability.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: July 17, 2012
    Assignee: Hyundai Steel Company
    Inventors: Wonjae Cho, Hyojoong Kwon, Kyoungho So, Kaeyoung Lee, Jutae Choi, Jinsoo Jang, Sukhyun Yoo
  • Publication number: 20120118525
    Abstract: A method for continuous and efficient casting roll of magnesium alloy plates including providing plural induction furnaces, resistance furnace, casting roll and rollers; adding metal elements into the induction furnaces, the metal elements comprising Mg ingots or Mg alloy, the metal elements being smelted in the induction furnaces and then flow into the resistance furnace; controlling temperature of the Mg melt in the resistance furnace, wherein there are at least two temperature controlling areas communicated with each other, and a difference of temperatures is constant; transferring the Mg melt into biting area through a transferring pipe and modeling the mg melt into Mg plate, the temperature of the Mg melt into the biting area being 690±10° C.; Rolling the Mg plate in the rollers and each band of the rollers having a working temperature 250˜350° C., and the difference of temperature is ±10° C.
    Type: Application
    Filed: May 10, 2010
    Publication date: May 17, 2012
    Inventors: Xuemin Chen, Qingdong Ye, Jianguo Li, Chaowen Liu, Yueming Yu
  • Patent number: 8176969
    Abstract: An apparatus for continuously casting thin strip includes a caster having a pair of casting rolls having a nip there between capable of delivering cast strip downwardly from the nip and an first enclosure capable of forming a protective atmosphere into which the strip can be formed in loop to extend over a plurality of rollers into pinch rolls with the strip having a strain of less than 0.4%, which may be provided by a plurality of rollers at entry of the strip into the pinch rolls to carry the strip into the pinch rolls, with at least a first entry roller having a diameter between 200 and 650 millimeters and being below a majority of other rollers.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: May 15, 2012
    Assignee: Nucor Corporation
    Inventors: Andrew Edward Dixon, Gary McQuillis, Rama Ballav Mahapatra, Leigh Wolley
  • Patent number: 8162031
    Abstract: A method of making steel comprising assembling a steelmaking furnace, a thin strip caster, and a mold caster, inputting to a computer data on demand for production output, raw materials, furnace availability and capacity, sequence schedules and through-put, capacities and variability, forecasting by processing by computer from the inputted data a production schedule for the steelmaking furnace, and sequence schedules for the thin strip and the mold casters as a function of molten metal availability, the thin strip and mold caster sequence schedules and through-put, and demand for production output, directing production of molten metal alternatively to the delivery systems of the thin strip caster and mold caster responsive to said forecasting, and varying during casting the rate of metal delivery through the delivery system of the thin strip caster responsive to molten metal availability and the mold caster through-put.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: April 24, 2012
    Assignee: Nucor Corporation
    Inventor: Richard Wechsler
  • Publication number: 20110300397
    Abstract: When aluminum alloy billet obtained by continuously casting molten aluminum alloy in the shape of rod is cut into a predetermined length by means of a cutting device, and then the aluminum alloy billet thus cut is loaded into a product carrier container with an identification mark that has been made, the casting condition and inspection results of the aluminum alloy billet are stored in the storage unit of a production control device in association with the identification mark so as to stabilize the quality and production of the aluminum alloy billet used for machining materials.
    Type: Application
    Filed: January 21, 2010
    Publication date: December 8, 2011
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, NIPPON LIGHT METAL COMPANY, LTD.
    Inventors: Kaoru Sugita, Takeshi Fujita, Mikio Kubota, Noriyuki Ueno, Takehito Kobayashi
  • Patent number: 8066054
    Abstract: A measuring system for measuring the strand condition of a continuous casting machine, the system comprising a plate member mounted on a caster chain (10) in use, the plate member (12) having an edge (14) that protrudes outwardly from one surface (13) of the caster chain (10); a pivotally mounted arm (16) capable of protruding outwardly from the opposing surface (17) of the caster chain (10); and means to determine the distance between the tip (18) of the arm (16) and the plate edge (14) at any given interval during use.
    Type: Grant
    Filed: November 23, 2007
    Date of Patent: November 29, 2011
    Assignee: Sarclad Limited
    Inventor: Richard Cowlishaw
  • Publication number: 20110277950
    Abstract: A method and an installation for the continuous checking and regulation of the level of the surface of a slag bath in an ESR installation with short slidable molds. For the continuous measurement of the position of the surface of the slag bath, the method employs a radar beam emitted by a radar measuring probe and directed approximately vertically onto the surface.
    Type: Application
    Filed: May 13, 2011
    Publication date: November 17, 2011
    Applicant: INTECO SPECIAL MELTING TECHNOLOGIES GMBH
    Inventors: Harald HOLZGRUBER, Martin LEBER
  • Patent number: 8051894
    Abstract: The present invention relates to an apparatus for centering a submerged entry nozzle. The present invention includes: a plurality of laser beam generators 20 that is disposed above a mold 3 for continuous casting to radiate a laser beam toward the center of the mold; a tundish moving unit 15 that moves a tundish 1 above the mold 3; and a control unit that is linked with the laser beam generators 20 and controls the tundish moving unit 15 to center the installation position of the submerged entry nozzle 5 provided at the lower portion of the tundish, in response to signals transmitted from the laser beam generators 20. According to the present invention, in addition to accurately and quickly centering the submerged entry nozzle 5, it is possible to maintain the submerged entry nozzle that has been centered, such that it is possible to minimize a channeling phenomenon of molten steel. Accordingly, it can be expected to improve the quality of a slab.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: November 8, 2011
    Assignee: Hyundai Steel Company
    Inventors: Hongkil Moon, Kaeyoung Lee, Jutae Choi, Jaehwan Ahn, Hyojoong Kwon
  • Patent number: 8042602
    Abstract: A method of making steel comprising assembling a steelmaking furnace, a thin strip caster, and a mold caster, inputting to a computer data on demand and customer requirements for production output, raw materials, furnace availability and capacity, ladle treatment for casting, sequence schedules and through-put, capacities and variability, forecasting by processing by computer from the inputted data a production schedule for the steelmaking furnace and ladle treatment, and sequence schedules for the thin strip and the mold casters as a function of molten metal availability, the thin strip and mold caster sequence schedules and through-put, and demand for production output, directing production of molten metal alternatively to the delivery systems of the thin strip caster and mold caster responsive to said forecasting, and varying during casting the rate of metal delivery through the delivery system of the thin strip caster responsive to molten metal availability and the mold caster through-put.
    Type: Grant
    Filed: June 6, 2010
    Date of Patent: October 25, 2011
    Assignee: Nucor Corporation
    Inventor: Richard Wechsler
  • Patent number: 8020605
    Abstract: A steel slab caster having a mold with movable opposing mold faces, and methods of using the steel slab caster for casting steel slabs. The movable opposing mold faces may be laterally positioned with respect to each other in a predefined configuration. Molten steel may be introduced into the mold of the slab caster. The forces exerted by the molten metal on at least one of the opposing mold faces and/or the lateral positions of the opposing mold faces may be monitored during casting at locations on at least one of the movable mold faces. The position of the monitored mold face may be controlled during casting responsive to the monitored forces and/or monitored position.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: September 20, 2011
    Assignee: Nucor Corporation
    Inventors: Adam J. Shutts, John Carlton Elinburg, II, Jonathon David Otts, George Gurley, David Walton Parsley
  • Publication number: 20110214835
    Abstract: A method for adjusting a roll segment of a strand guide of a slab-casting installation against a strand, wherein the roll segment has an upper and a lower roll support that each have an adjusting element for adjusting the two roll supports relative to each other. The method includes individual control of the individual adjusting elements, wherein the actual profile of the strand, including the heights of the right and left lateral edges of the strand, is detected and compared with a set profile that includes a predetermined set height, which is the same for the right and left lateral edges, and the individual adjusting elements of the roll segment are individually controlled based on the control deviation that results from the comparison so that the actual profile is adapted to the set profile, including equalization of the heights of the right and left lateral edges of the strand.
    Type: Application
    Filed: May 13, 2011
    Publication date: September 8, 2011
    Applicant: SMS SIEMAG AKTIENGESELLSCHAFT
    Inventors: Axel WEYER, Christian STOLP, Hans Esau KLASSEN
  • Patent number: 8006743
    Abstract: A method of and a device for determining the position of the solidification point (1a) in a strand (1) during continuous casting of liquid metals, in particular of steel, lead to precise results, while an indirect measurement of a movable amount of a core liquid volume per unit of length is carried out by direct measurement of generated process parameters by force and/or path signals on fixed or adjustable individual support rollers or groups of fixed or adjustable support roller pairs, and based on the measurement values, a calculation model for a momentary position of the solidification point (1a) is produced, based on which, changeable casting parameters are continuously adjusted.
    Type: Grant
    Filed: January 13, 2005
    Date of Patent: August 30, 2011
    Assignee: SMS Siemag AG
    Inventors: Axel Weyer, Albrecht Girgensohn
  • Patent number: 7984748
    Abstract: An apparatus for continuously casting thin strip includes a caster having a pair of casting rolls having a nip there between capable of delivering cast strip downwardly from the nip and an first enclosure capable of forming a protective atmosphere into which the strip can be formed in loop to extend over a plurality of rollers into pinch rolls with the strip having a strain of less than 0.4%, which may be provided by a plurality of rollers at entry of the strip into the pinch rolls to carry the strip into the pinch rolls, with at least a first entry roller having a diameter between 200 and 650 millimeters and being below a majority of other rollers.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: July 26, 2011
    Assignee: Nucor Corporation
    Inventors: Andrew Edward Dixon, Gary McQuillis, Rama Ballav Mahapatra, Leigh Wolley
  • Patent number: 7971630
    Abstract: A method for detecting a crater end of a continuously cast product, including installing an ultrasonic shear wave sensor for transmitting an ultrasonic shear wave to the continuously cast product and receiving the transmitted ultrasonic shear wave in a continuous casting machine, detecting based on variations of an ultrasonic signal received by the ultrasonic shear wave sensor that the crater end of the cast product is matched with the installed position of the ultrasonic shear wave sensor, calibrating a physical property value used in a calculation based on a heat condition equation such that the crater end computed based on the heat condition equation using casting conditions at that time is matched with the installed position of the ultrasonic shear wave sensor, and after the calibration, determining the crater end by the calculation based on the heat condition equation under respective casting conditions by using the calibrated physical property value.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: July 5, 2011
    Assignee: JFE Steel Corporation
    Inventors: Yukinori Iizuka, Jun Kubota, Koichi Tsutsumi
  • Publication number: 20110127002
    Abstract: The present invention relates to an apparatus for centering a submerged entry nozzle. The present invention includes: a plurality of laser beam generators 20 that is disposed above a mold 3 for continuous casting to radiate a laser beam toward the center of the mold; a tundish moving unit 15 that moves a tundish 1 above the mold 3; and a control unit that is linked with the laser beam generators 20 and controls the tundish moving unit 15 to center the installation position of the submerged entry nozzle 5 provided at the lower portion of the tundish, in response to signals transmitted from the laser beam generators 20. According to the present invention, in addition to accurately and quickly centering the submerged entry nozzle 5, it is possible to maintain the submerged entry nozzle that has been centered, such that it is possible to minimize a channeling phenomenon of molten steel. Accordingly, it can be expected to improve the quality of a slab.
    Type: Application
    Filed: February 20, 2009
    Publication date: June 2, 2011
    Applicant: HYUNDAI STEEL COMPANY
    Inventors: Hongkil Moon, Kaeyoung Lee, Jutae Choi, Jaehwan Ahn, Hyojoong Kwon
  • Patent number: 7938167
    Abstract: A method for operating a two-roll casting machine for casting molten metal into cast strip, which machine has two casting rolls which are each rotatively driven in opposite directions about an axis of rotation and between them delimit a casting gap on its longitudinal sides, with side plates that can be placed on the casting rolls, which side plates seal the casting gap on its narrow sides in the casting operation, bridging the casting gap with a refractory material, wherein the side plates are moved during the casting operation in a direction which is aligned parallel to the direction of conveying in which the cast strip leaves the casting gap. With such a method the formation of grooves distorting the casting result and the casting operation can be suppressed with increased certainty and the service life of the side plates can be increased, compared to the prior art.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: May 10, 2011
    Assignee: ThyssenKrupp Nirosta GmbH
    Inventors: André d'Hone, René Leenen
  • Publication number: 20110073271
    Abstract: Disclosed herein are an apparatus and method for controlling the edge shape of a strip in a twin-roll strip casting process, which improve the quality of the strip by using cameras to photograph the edge portions of the strip being cast by strip casting, analyzing the photographs, and then controlling edge dams according to the edge shape of the strip. The apparatus comprises: an edge dam driving unit which is attached to edge dams attached to both sides of casting rolls so as to control the pressing force of the edge dams against the casting rolls and the upward shift of the edge dams according to the wear and upward shift rate of the edge dams; cameras which are disposed at the strip outlet side of the casting rolls so as to photograph the edge portions of the strip; and a control unit which analyzes the edge shape of the strip from images photographed by the cameras and outputs a signal controlling the wear and upward shift of the edge dams.
    Type: Application
    Filed: September 25, 2008
    Publication date: March 31, 2011
    Inventors: Yoon-Ha Kim, Sang-Hoon Kim, Han-Nam Cheong
  • Patent number: 7891407
    Abstract: A method of and apparatus for continuous casting of thin cast strip including removing oxides from the casting surface of each casting roll by contacting the casting surface of each casting roll with a rotating brush between the nip and the casting area, determining the temperature in segments along the casting roll surfaces or across the cast strip adjacent the nip, and delivering gas adjacent the casting surface between the rotating cleaning brush and the casting area regulated in segments corresponding to the determined temperature in the segment to control the quality of the strip produced. The gas delivery adjacent the casting surface between the rotating brush and the casting area may be done in at least five segments along the casting roll, and the temperature determination step may be done in a continuum such as by a scanning pyrometer. The temperature determination of the cast strip may be done between 0.2 and 1 meter from the nip.
    Type: Grant
    Filed: November 26, 2007
    Date of Patent: February 22, 2011
    Assignee: Nucor Corporation
    Inventors: Mark Schlichting, Walter Blejde, Eugene Pretorius
  • Publication number: 20100314069
    Abstract: A method of making steel comprising assembling a steelmaking furnace, a thin strip caster, and a mold caster, inputting to a computer data on demand and customer requirements for production output, raw materials, furnace availability and capacity, ladle treatment for casting, sequence schedules and through-put, capacities and variability, forecasting by processing by computer from the inputted data a production schedule for the steelmaking furnace and ladle treatment, and sequence schedules for the thin strip and the mold casters as a function of molten metal availability, the thin strip and mold caster sequence schedules and through-put, and demand for production output, directing production of molten metal alternatively to the delivery systems of the thin strip caster and mold caster responsive to said forecasting, and varying during casting the rate of metal delivery through the delivery system of the thin strip caster responsive to molten metal availability and the mold caster through-put.
    Type: Application
    Filed: June 6, 2010
    Publication date: December 16, 2010
    Applicant: NUCOR CORPORATION
    Inventor: Richard Wechsler
  • Patent number: 7775259
    Abstract: A method of controlling in a twin roll strip caster the thickness of as-cast strip by determining and operating at a target depth of the casting pool and a target speed of the casting rolls. The as-cast strip may be cast to a customer-specified thickness or may be subsequently rolled to a customer-specified thickness.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: August 17, 2010
    Assignee: Nucor Corporation
    Inventors: Walter N. Blejde, Rama Ballav Mahapatra