Patents by Inventor Albrecht Girgensohn

Albrecht Girgensohn has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8240357
    Abstract: A continuous casting mold includes mold plates which enclose the casting cross section and in which cooling channels extend. The mold plates are connectable to a water box by screw elements which are formed by fastening bolts having a threaded shank which is screwable into fastening threads located in the mold plate. To achieve a uniform cooling in a continuous casting mold, the fastening threads are arranged such that their center longitudinal axes extend between two adjacent coolant channels of the plurality of cooling channels. The diameter of each threaded bore hole of the fastening threads is greater than the distance between the two adjacent cooling channels, and each bore hole of the fastening threads ends at a distance from the floor of the plurality of cooling channels to define the screw-in depth of the fastening bolts.
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: August 14, 2012
    Assignee: SMS Siemag AG
    Inventors: Markus Reifferscheid, Albrecht Girgensohn
  • Patent number: 8205662
    Abstract: The invention relates to a method for the continuous casting of a metal strand (1), in which the cast strand (1) leaves a die (2) vertically or arcuately downwards and is subsequently guided in a strand guide (3), wherein the strand guide (3) has a number of pairs of rollers (4), which define between them an adjustable roller nip (5), and wherein, at the start of casting, to close the die (2) in the downward direction, a piece of strand (6) is introduced into the die (2) and is followed by the cast strand (1). In order to improve the adjustment of the roller nip, the invention provides that the piece of strand (6), which is produced with a defined or calibrated thickness (d), is inserted between the respective pairs of rollers to calibrate and/or measure the roller nip (5).
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: June 26, 2012
    Assignee: SMS Demag Aktiengesellschaft
    Inventors: Albrecht Girgensohn, Lothar Schaps, Uwe Plociennik
  • 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
  • Publication number: 20110180231
    Abstract: A continuous casting mold having at least one mechanically machined surface that is in contact with molten material during normal use of the mold in order to achieve a uniform distribution of the heat flux over the mold.
    Type: Application
    Filed: February 11, 2011
    Publication date: July 28, 2011
    Applicant: SMS SIEMAG AKTIENGESELLSCHAFT
    Inventors: Gereon Fehlemann, Albrecht Girgensohn
  • Patent number: 7971629
    Abstract: A strand guide roller (100) of a strand guide device for guiding a cast strand (200) includes at least one first and one second sectional rollers arranged next to each other, includes a middle bearing (120-1, 120-2) located between both sectional rollers (110-1, 110-2) for receiving and supporting the roller journal (112-1) of the first sectional roller (110-1) formed on an end surface of the first sectional roller (110-1) adjacent to the second sectional roller (110-2), with the first and second sectional rollers being connected with each other outside of the middle bearing by a plug-in connection.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: July 5, 2011
    Assignee: Hermmerich & Colleagues
    Inventors: Axel Bekurts, Albrecht Girgensohn, Axel Stavenow, Erich Hovestaedt, Dirk Mangler
  • Patent number: 7958930
    Abstract: The invention relates to a wall (100) of a casting die for casting a molten metal. Die walls comprising a front plate (110) with a pocket borehole (112) and a rear plate (120) with a transversal borehole (122) aligned with the pocket borehole, on the cold side of the die front plate, are known in prior art. The aim of the invention is prevent the entrance of cooling liquid from the transition region (115), between the front plate (110) and the rear plate (120), into the pocket borehole (112) or the transversal borehole (122). To this end, a sealing element (140) having a longitudinal borehole is arranged in the transition region (115) in such a way that the longitudinal borehole of the sealing element is at least approximately aligned with the transversal borehole (122) in the rear plate of the die and the pocket borehole (112) in the front plate of the die.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: June 14, 2011
    Assignee: SMS Siemag Aktiengesellschaft
    Inventors: Gereon Fehlemann, Albrecht Girgensohn, Jörn Hoffmeister
  • Patent number: 7827872
    Abstract: The invention relates to an apparatus and a method for guiding a strip, in particular a metal strip. Known apparatuses of this type have a carrier device (110) on which bearing blocks (120) arm fastened. Rollers (130) are rotatably mounted in the bearing blocks in order to guide the strip. So that the roller force acting on the roller in the loading case, i.e. during the guidance of the strip, can be measured in a lasting and reliable manner, it is proposed according to the invention to detect the deformation of the bearing block, in particular in the loading case, by means of a sensor device and ten to calculate the roller force required from the deformation of the bearing block by means of an evaluating device.
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: November 9, 2010
    Assignee: SMS Siemag Aktiengesellschaft
    Inventors: Albrecht Girgensohn, Andreas Runge
  • Publication number: 20100059195
    Abstract: A continuous casting mold includes mold plates which enclose the casting cross section and in which cooling channels extend. The mold plates are connectable to a water box by screw elements which are formed by fastening bolts having a threaded shank which is screwable into fastening threads located in the mold plate. To achieve a uniform cooling in a continuous casting mold, the fastening threads are arranged such that their center longitudinal axes extend between two adjacent coolant channels of the plurality of cooling channels. The diameter of each threaded bore hole of the fastening threads is greater than the distance between the two adjacent cooling channels, and each bore hole of the fastening threads ends at a distance from the floor of the plurality of cooling channels to define the screw-in depth of the fastening bolts.
    Type: Application
    Filed: October 18, 2007
    Publication date: March 11, 2010
    Applicant: SMS Schloemann-Strasse 4
    Inventors: Markus Reifferscheid, Albrecht Girgensohn
  • Publication number: 20100051226
    Abstract: The invention relates to a method for the continuous casting of a metal strand (1), in which the cast strand (1) leaves a die (2) vertically or arcuately downwards and is subsequently guided in a strand guide (3), wherein the strand guide (3) has a number of pairs of rollers (4), which define between them an adjustable roller nip (5), and wherein, at the start of casting, to close the die (2) in the downward direction, a piece of strand (6) is introduced into the die (2) and is followed by the cast strand (1). In order to improve the adjustment of the roller nip, the invention provides that the piece of strand (6), which is produced with a defined or calibrated thickness (d), is inserted between the respective pairs of rollers to calibrate and/or measure the roller nip (5).
    Type: Application
    Filed: August 16, 2007
    Publication date: March 4, 2010
    Inventors: Albrecht Girgensohn, Lothar Schaps, Uwe Plociennik
  • Publication number: 20100000701
    Abstract: The invention relates to a wall (100) of a casting die for casting a molten metal. Die walls comprising a front plate (110) with a pocket borehole (112) and a rear plate (120) with a transversal borehole (122) aligned with the pocket borehole, on the cold side of the die front plate, are known in prior art. The aim of the invention is prevent the entrance of cooling liquid from the transition region (115), between the front plate (110) and the rear plate (120), into the pocket borehole (112) or the transversal borehole (122). To this end, a sealing element (140) having a longitudinal borehole is arranged in the transition region (115) in such a way that the longitudinal borehole of the sealing element is at least approximately aligned with the transversal borehole (122) in the rear plate of the die and the pocket borehole (112) in the front plate of the die.
    Type: Application
    Filed: December 11, 2007
    Publication date: January 7, 2010
    Inventors: Gereon Fehlemann, Albrecht Girgensohn, Jörn Hoffmeister
  • Publication number: 20090301225
    Abstract: The invention relates to an apparatus and a method for guiding a strip, in particular a metal strip. Known apparatuses of this type have a carrier device (110) on which bearing blocks (120) arm fastened. Rollers (130) are rotatably mounted in the bearing blocks in order to guide the strip. So that the roller force acting on the roller in the loading case, i.e. during the guidance of the strip, can be measured in a lasting and reliable manner, it is proposed according to the invention to detect the deformation of the bearing block, in particular in the loading case, by means of a sensor device and ten to calculate the roller force required from the deformation of the bearing block by means of an evaluating device.
    Type: Application
    Filed: May 30, 2007
    Publication date: December 10, 2009
    Inventors: Albrecht Girgensohn, Andreas Runge
  • Publication number: 20090165985
    Abstract: The invention relates to a strand guide roller 100 of a strand guide device for guiding a cast strand 200. The stand guide roller includes at least one first and one second sectional roller arranged next to each other, wherein the first sectional roller 110-1 has a roller journal 112-1 at its end surface adjacent to the second sectional roller. In addition, the strand guide roller includes a middle bearing 120-1, 120-2 between both sectional rollers 110-1, 110-2 for receiving and supporting the roller journal 112-1 of the first sectional roller. In order to improve strand guidance by increasing the bearing surface for the strand 200, it is suggested, according to the invention, that the first and second sectional rollers be connected with each other outside of the middle bearing by a plug-in connection. Then, according to the invention, the middle bearing is formed simply as unsplit separate bearing with an essentially smaller window width in comparison with a split bearing.
    Type: Application
    Filed: March 30, 2007
    Publication date: July 2, 2009
    Inventors: Axel Bekurts, Albrecht Girgensohn, Axel Stavenow, Erich Hovestaedt, Dirk Mangler
  • Publication number: 20090114363
    Abstract: The invention relates to a component (1) for a continuous casting mould, such as a water box, adapter plate etc., to which a copper plate is fixed. The component (1) is composed of at least two individual elements (2, 3, 4, 6, 7), consisting of different materials. The invention also relates to a method for producing a component for a continuous casting mould.
    Type: Application
    Filed: August 24, 2006
    Publication date: May 7, 2009
    Inventors: Albrecht Girgensohn, Olaf Thamke, Volker Tiepelmann
  • Publication number: 20090107648
    Abstract: The invention relates to a roll (1) for metal production and/or metal processing, in particular a continuous casting roll, which has a roll parent body (2) of metal and a coating (3) of wear-resistant material applied to said roll parent body (2). In order to make the roll, in particular the continuous casting roll, especially wear-resistant, the invention provides for the coating (3) to have electrolytically applied nickel, wherein the surface (4) of the coating (3) forms the working surface of the roll (1). Furthermore, the invention relates to a method of producing a roll (1) for metal production and/or metal processing, in particular a continuous casting roll.
    Type: Application
    Filed: January 29, 2007
    Publication date: April 30, 2009
    Inventors: Gereon Fehlemann, Albrecht Girgensohn, Michael Rzepczyk, Erich Hovestadt, Christian Geerkens, Axel Weyer
  • Publication number: 20080308251
    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: Application
    Filed: January 13, 2005
    Publication date: December 18, 2008
    Inventors: Axel Weyer, Albrecht Girgensohn
  • Publication number: 20080173422
    Abstract: The invention relates to a method for producing a continuous casting mold (1), during which at least one surface (2) is mechanically machined that is in contact with molten material during normal use of the mold. The aim of the invention is to achieve a uniform distribution of the heat flux over the mold. To this end, the invention provides that, as the last working step during the production of the surface (2) of the mold (1), a mechanical machining is carried out whereby producing a surface anisotropy. The invention also relates to a continuous casting mold.
    Type: Application
    Filed: March 10, 2006
    Publication date: July 24, 2008
    Inventors: Gereon Fehlemann, Albrecht Girgensohn
  • Publication number: 20080164003
    Abstract: The production of steels with high contents of manganese (Mn), aluminum (Al), and silicon (Si) with TWIP properties (Twinning-Induced Plasticity) by continuous casting is considered difficult or impossible in the present state of the art for various reasons. These reasons include low strength of the strand shell during solidification due to intense microsegregation of Mn, high strength at relatively low temperatures, reactions of the aluminum in the steel with the flux powder, macrosegregation, depletion of the alloying elements near the surface, and oxidation of the grain boundaries during the reheating of slabs in the pusher furnace. Therefore, in accordance with the invention, successively arranged process steps are used to cast light gauge steel with a given chemical composition of 15-27% Mn, 1-6% Al, 1-6% Si, ?0.
    Type: Application
    Filed: March 3, 2006
    Publication date: July 10, 2008
    Inventors: Jens Kempken, Markus Reifferscheid, Albrecht Girgensohn
  • Patent number: 6487504
    Abstract: A method of determining the friction between the strand shell and the mold during continuous casting with an oscillating mold includes measuring with the use of controlled double-acting hydraulic cylinders and with a predeterminable measuring frequency the pressures of always both chambers of all oscillating cylinders as well as the lifting positions of the pistons corresponding to these pressures, and by computing from these data the friction force acting at any point in time between the strand shell and the mold walls.
    Type: Grant
    Filed: March 30, 2000
    Date of Patent: November 26, 2002
    Assignee: SMS Schloemann-Siemag Aktiengesellschaft
    Inventor: Albrecht Girgensohn
  • Publication number: 20010042608
    Abstract: A liquid-cooled plate mold for continuous casting of metals has highly heat-conductive mold plates of copper or a copper alloy. The mold plates have a water side. A fastening support for each mold plate is provided for securing the mold plate thereon. The fastening support is in the form of a water box or a support plate. Fastening elements for securing the mold plates to the fastening supports are provided. Shaped parts having a thread are arranged on the water side of the mold plates. The shaped parts form fastening pieces that are non-positively connected by soldering connections or welding connections to the mold plates, wherein the fastening elements engage the fastening pieces.
    Type: Application
    Filed: March 22, 2001
    Publication date: November 22, 2001
    Inventors: Hans Streubel, Albrecht Girgensohn, Michael Poran