Equal Size Pair Of Reaction Rolls Patents (Class 72/243.4)
  • Patent number: 8966951
    Abstract: A spraying method and device for a plant for rolling a strip, the plant having at least one rolling stand. The device includes: a pair of working rolls between which the strip runs; a plane perpendicular to the running direction of the strip; at least one pair of supporting rolls for the working rolls; two pairs of bearing rolls, each of the pairs having the rolls thereof substantially symmetrically arranged on either side of the working rolls in a plane substantially parallel to the strip so as to transfer, to the working rolls, a force for maintaining the working rolls in a predetermined position relative to the supporting roll; a support for the bearing rolls in the form of two rows including a plurality of bearing rollers mounted side by side; one or more nozzle systems for spraying at least a portion of the strip and at least a portion of the rolls.
    Type: Grant
    Filed: February 2, 2009
    Date of Patent: March 3, 2015
    Assignee: Siemens VAI Metals Technologies SAS
    Inventors: Vincent Cronier, Bernard Rossigneux
  • Patent number: 8607609
    Abstract: A rolling mill, which can use work rolls of a smaller diameter for rolling a hard material and a thin strip material, and can decrease edge drops and improve surface gloss, is provided. For this purpose, a rolling mill, which includes upper and lower work rolls (2) as a pair for rolling a strip (1), upper and lower intermediate rolls (3) as a pair for supporting the upper and lower work rolls as the pair, and upper and lower back-up rolls (4) as a pair for supporting the upper and lower intermediate rolls as the pair, is configured such that the upper and lower work rolls as the pair are supported by a plurality of supporting bearings (8a to 8f and 9a to 9f) arranged vertically zigzag on an entry side in a rolling direction, and a plurality of supporting bearings (10a to 10f and 11a to 11f) arranged vertically zigzag on an delivery side in the rolling direction, at positions outward of a rollable strip width, and the plurality of supporting bearings lap over each other vertically.
    Type: Grant
    Filed: January 15, 2009
    Date of Patent: December 17, 2013
    Assignee: Mitsubishi-Hitachi Metals Machinery, Inc.
    Inventor: Takashi Norikura
  • Patent number: 8365567
    Abstract: The object is to eliminate the difference in offset of work rolls at the upper and lower and left and right of the rolling mill occurring in the kiss roll state of the zero point adjustment work before rolling or during rolling and eliminate the problem of warping of the flat products or meander or camber due to the thrust force acting between the work rolls and backup rolls.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: February 5, 2013
    Assignee: Nippon Steel Corporation
    Inventors: Shigeru Ogawa, Atsushi Ishii, Daisuke Kasai
  • Patent number: 7665339
    Abstract: The invention relates to a process for increasing the range of production of an installation for cold rolling of metallic strip, consisting of at least two rolling stands (L1, L2) operating in tandem. According to the invention, at least one (L1) of the rolling stands is equipped with means of converting the stand configuration, while keeping the same means (15, 16, 3, 3?) of applying the rolling force, in order to have at least two configurations available, each corresponding to one production range, and the configuration of said convertible stand L1 is selected to match the data of the product (M) to be rolled, thus allowing the production range to be increased.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: February 23, 2010
    Assignee: VAI Clecim
    Inventors: Marc Valence, Bernard Rossigneux
  • Patent number: 7481089
    Abstract: The invention relates to a process for increasing the range of production of an installation for cold rolling of metallic strip, consisting of at least two rolling stands operating in tandem. According to the invention, at least one of the rolling stands is equipped with means of converting the stand configuration, while keeping the same means of applying the rolling force, in order to have at least two configurations available, each corresponding to one production range, and the configuration of said convertible stand is selected to match the data of the product (M) to be rolled, thus allowing the production range to be increased.
    Type: Grant
    Filed: November 4, 2003
    Date of Patent: January 27, 2009
    Assignee: Siemens Vai Metals Technologies SAS
    Inventors: Marc Valence, Bernard Rossigneux
  • Patent number: 7302820
    Abstract: The invention relates to a method for changing the configuration of a rolling mill including at least two working rolls and two back-up rolls, means for applying a clamping load and two sets of hydraulic cambering cylinders, at least of both working rolls. According to the invention, at least two types of working rolls (C1, C2) are realized having, respectively a great diameter and a small diameter and the quarto configuration rolling mill is switched to a sexto configuration and conversely, the rolls with great diameter (C1, C?1) being used as working rolls in the quarto configuration and, in the sexto configuration, as intermediate rolls between each back-up roll and a roll with small diameter (C2, C?2) used as a working roll.
    Type: Grant
    Filed: March 5, 2004
    Date of Patent: December 4, 2007
    Assignee: Siemens VAI Metals Technologies SAS
    Inventor: Germain Le Viavant
  • Patent number: 7104101
    Abstract: The invention relates to a roll stand comprising a pair of work rolls 1, 2 for rolling a metal strip B, comprising back-up rolls 8, 9, 10, 11 which provide lateral support to their respectively allocated work rolls 1, 2, with support force directed towards the work rolls 1, 2 being able to be applied to said back-up rolls by means of a force generation device, and comprising support rolls or intermediate rolls 3, 4 which are borne by a chock which can be slid into the roll stand W1, W2 in the direction of the longitudinal axis of said chock 7, and wherein said chock can be withdrawn from said roll stand, with each support roll or intermediate roll supporting an associated work roll 1, 2 in a direction which is essentially perpendicular to the direction of movement of the metal strip B.
    Type: Grant
    Filed: August 1, 2000
    Date of Patent: September 12, 2006
    Assignee: Sundwig GmbH
    Inventors: Bernd Berger, Heinrich Schulte, Damian Cöppicus
  • Patent number: 6619092
    Abstract: In a tandem rolling mill facility and a rolling method using the tandem rolling mill facility, stable rolling is performed with suppressing deflection of working rolls and without fluctuation of working roll bearing boxes. Axes of working rolls 1 are offset toward a side opposite to a side of larger tension between tensions acting on a rolled material at an inlet side and an outlet side with respect to axes of intermediate rolls, and a hydraulic cylinder for pushing a working roll bearing box toward the same side as the offset direction is contained in a block.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: September 16, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Toru Nakayama, Michimasa Takagi
  • Patent number: 6496120
    Abstract: A system for continuous and real-time detection of skidding conditions in a rolling mill in which continuous monitoring of conditions which could lead to skidding and analysis of the monitored conditions is effected and wherein an alarm signal is produced when conditions exceed a threshold and indicate skidding. The system provides for immediate correction of skidding conditions to safeguard the machinery and mill equipment against damage.
    Type: Grant
    Filed: September 7, 1999
    Date of Patent: December 17, 2002
    Assignee: Steel Authority of India Limited
    Inventors: Murty Suryanarayana Devulapalli, Murty Sri Rama Kolluru, Deepak Kumar, Krishnan Shivarama Anantanarayan, Sushil Kumar Sablok, Gopala Krishna Mokkapaty, Mitadru Ray, Sushil Chandra Khan
  • Patent number: 6446477
    Abstract: The invention intends to always maintain a distance between a hydrostatic pressure bearing and a roll even in a transient state before and after the start of rolling, thereby sufficiently and surely preventing damage of those components upon contact with each other, and to prevent a lowering of yield. In a plate rolling mill comprising upper and lower work rolls, and hydrostatic pressure bearings for supporting barrel portions of idler rolls in a non-contact manner with fluid pressure substantially along the horizontal direction, the idler rolls supporting the work rolls substantially along the horizontal direction, gap restraining rolls are provided to prevent gaps between the hydrostatic pressure bearings and the idler rolls from becoming lower than a predetermined value.
    Type: Grant
    Filed: April 19, 2001
    Date of Patent: September 10, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Kenichi Yasuda, Mitsuo Nihei, Yukio Hirama, Yoshio Takakura
  • Publication number: 20010020380
    Abstract: The invention intends to always maintain a distance between a hydrostatic pressure bearing and a roll even in a transient state before and after the start of rolling, thereby sufficiently and surely preventing damage of those components upon contact with each other, and to prevent a lowering of yield. In a plate rolling mill comprising upper and lower work rolls, and hydrostatic pressure bearings for supporting barrel portions of idler rolls in a non-contact manner with fluid pressure substantially along the horizontal direction, the idler rolls supporting the work rolls substantially along the horizontal direction, gap restraining rolls are provided to prevent gaps between the hydrostatic pressure bearings and the idler rolls from becoming lower than a predetermined value.
    Type: Application
    Filed: April 19, 2001
    Publication date: September 13, 2001
    Applicant: Hitachi, Ltd.
    Inventors: Kenichi Yasuda, Mitsuo Nihei, Yukio Hirama, Yoshio Takakura
  • Publication number: 20010018840
    Abstract: To preferably roll a hard material or an ultra thin material by more reliably supporting small diameter work rolls even under a transient condition such as when starting a rolling operation or when finishing a rolling operation, undriven both ends support rolls 9, 10, 11 and 12 are provided on outer sides of a width along which a maximum sheet width of strip passes on a barrel portion of the work roll 3, to be opposed to each other at an entry side and a delivery side of respective end portions to thereby press and support the work roll. Further, hydrostatic bearings 21 and 23 are installed at central portions of both side barrels of the work roll 3, and fluid such as oil is supplied from fluid pressure supply ports 25 and 26 to the bearing portions to thereby float up the work rolls 3 by forming gaps between the hydrostatic bearings 21 and 23 and the work roll 3 and support the work roll 3 in horizontal direction in noncontact.
    Type: Application
    Filed: February 23, 2001
    Publication date: September 6, 2001
    Applicant: HITACHI, LTD.
    Inventors: Mistuo Nihei, Kenichi Yasuda, Yukio Hirama, Minoru Igari