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).
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Patent number: 8240357Abstract: 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: GrantFiled: October 18, 2007Date of Patent: August 14, 2012Assignee: SMS Siemag AGInventors: Markus Reifferscheid, Albrecht Girgensohn
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Patent number: 8205662Abstract: 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: GrantFiled: August 16, 2007Date of Patent: June 26, 2012Assignee: SMS Demag AktiengesellschaftInventors: Albrecht Girgensohn, Lothar Schaps, Uwe Plociennik
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Patent number: 8006743Abstract: 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: GrantFiled: January 13, 2005Date of Patent: August 30, 2011Assignee: SMS Siemag AGInventors: Axel Weyer, Albrecht Girgensohn
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METHOD FOR PRODUCING A CONTINUOUS CASTING MOLD AND A CONTINUOUS CASTING MOLD PRODUCED BY THIS METHOD
Publication number: 20110180231Abstract: 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: ApplicationFiled: February 11, 2011Publication date: July 28, 2011Applicant: SMS SIEMAG AKTIENGESELLSCHAFTInventors: Gereon Fehlemann, Albrecht Girgensohn -
Patent number: 7971629Abstract: 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: GrantFiled: March 30, 2007Date of Patent: July 5, 2011Assignee: Hermmerich & ColleaguesInventors: Axel Bekurts, Albrecht Girgensohn, Axel Stavenow, Erich Hovestaedt, Dirk Mangler
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Patent number: 7958930Abstract: 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: GrantFiled: December 11, 2007Date of Patent: June 14, 2011Assignee: SMS Siemag AktiengesellschaftInventors: Gereon Fehlemann, Albrecht Girgensohn, Jörn Hoffmeister
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Patent number: 7827872Abstract: 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: GrantFiled: May 30, 2007Date of Patent: November 9, 2010Assignee: SMS Siemag AktiengesellschaftInventors: Albrecht Girgensohn, Andreas Runge
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Publication number: 20100059195Abstract: 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: ApplicationFiled: October 18, 2007Publication date: March 11, 2010Applicant: SMS Schloemann-Strasse 4Inventors: Markus Reifferscheid, Albrecht Girgensohn
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Publication number: 20100051226Abstract: 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: ApplicationFiled: August 16, 2007Publication date: March 4, 2010Inventors: Albrecht Girgensohn, Lothar Schaps, Uwe Plociennik
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Publication number: 20100000701Abstract: 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: ApplicationFiled: December 11, 2007Publication date: January 7, 2010Inventors: Gereon Fehlemann, Albrecht Girgensohn, Jörn Hoffmeister
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Publication number: 20090301225Abstract: 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: ApplicationFiled: May 30, 2007Publication date: December 10, 2009Inventors: Albrecht Girgensohn, Andreas Runge
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Publication number: 20090165985Abstract: 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: ApplicationFiled: March 30, 2007Publication date: July 2, 2009Inventors: Axel Bekurts, Albrecht Girgensohn, Axel Stavenow, Erich Hovestaedt, Dirk Mangler
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Publication number: 20090114363Abstract: 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: ApplicationFiled: August 24, 2006Publication date: May 7, 2009Inventors: Albrecht Girgensohn, Olaf Thamke, Volker Tiepelmann
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Publication number: 20090107648Abstract: 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: ApplicationFiled: January 29, 2007Publication date: April 30, 2009Inventors: Gereon Fehlemann, Albrecht Girgensohn, Michael Rzepczyk, Erich Hovestadt, Christian Geerkens, Axel Weyer
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Publication number: 20080308251Abstract: 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: ApplicationFiled: January 13, 2005Publication date: December 18, 2008Inventors: Axel Weyer, Albrecht Girgensohn
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Publication number: 20080173422Abstract: 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: ApplicationFiled: March 10, 2006Publication date: July 24, 2008Inventors: Gereon Fehlemann, Albrecht Girgensohn
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Publication number: 20080164003Abstract: 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: ApplicationFiled: March 3, 2006Publication date: July 10, 2008Inventors: Jens Kempken, Markus Reifferscheid, Albrecht Girgensohn
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Patent number: 6487504Abstract: 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: GrantFiled: March 30, 2000Date of Patent: November 26, 2002Assignee: SMS Schloemann-Siemag AktiengesellschaftInventor: Albrecht Girgensohn
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Publication number: 20010042608Abstract: 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: ApplicationFiled: March 22, 2001Publication date: November 22, 2001Inventors: Hans Streubel, Albrecht Girgensohn, Michael Poran