Patents by Inventor Wilfried Bald

Wilfried Bald 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: 7251978
    Abstract: The aim of the invention is to improve known roll stands (10) which are characterized by working rolls (1,2) of various diameters, in such a way that a strip is obtained which is largely free of tensions and undulations, has a desired strip profile superelevation, and can be used approximately universally.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: August 7, 2007
    Assignee: SMS Demag AG
    Inventors: Jürgen Seidel, Wilfried Bald
  • Patent number: 6832432
    Abstract: A hot-rolling mill for flat products with at least two continuous casting units, wherein the continuous casting units are followed by a shear each and a tunnel furnace with transfer car each, a common breaking-down train, a finishing train, a cooling stretch and at least one reeling device. A connecting device is arranged between the tunnel furnaces and the breaking-down train for connecting the continuously cast slabs which have been cut into the desired coil weights.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: December 21, 2004
    Assignee: SMS Schloemann-Siemag Aktiengesellschaft
    Inventors: Wilfried Bald, Dieter Rosenthal
  • Publication number: 20040040358
    Abstract: The aim of the invention is to improve known roll stands (10) which are characterised by working rolls (1, 2) of various diameters, in such a way that a strip is obtained which is largely free of tensions and undulations, has a desired strip profile superelevation, and can be used approximately universally.
    Type: Application
    Filed: July 19, 2003
    Publication date: March 4, 2004
    Inventors: Jurgen Seidel, Wilfried Bald
  • Publication number: 20020095764
    Abstract: A hot-rolling mill for flat products with at least two continuous casting units, wherein the continuous casting units are followed by a shear each and a tunnel furnace with transfer car each, a common breaking-down train, a finishing train, a cooling stretch and at least one reeling device. A connecting device is arranged between the tunnel furnaces and the breaking-down train for connecting the continuously cast slabs which have been cut into the desired coil weights.
    Type: Application
    Filed: March 27, 2002
    Publication date: July 25, 2002
    Inventors: Wilfried Bald, Dieter Rosenthal
  • Patent number: 6216516
    Abstract: The invention relates to an installation for cold rolling strip-shaped rolling material, with a reversing stand disposed between two reel-up or unreeling coils or reels, and a second reversing stand in the rolling line of the first reversing stand, with both stands capable of being adjusted corresponding to consecutive passes for performing the rolling process, and to a method of cold rolling.
    Type: Grant
    Filed: April 21, 1999
    Date of Patent: April 17, 2001
    Assignee: SMS Schloemann-Siemag AG
    Inventors: Klaus Klamma, Wilfried Bald
  • Patent number: 6149740
    Abstract: A method of and apparatus for manufacturing hot-rolled steel strips from a continuously cast primary material, preferably thin slabs, in a plurality of successive steps in a continuous operation is disclosed. In the invention, thin slabs, which leave an equalizing furnace, are heated above the maximum temperature that can be achieved in the equalizing furnace and are thereafter are broken down in a break-down train, with the broken-down thin slabs being subsequently recrystallized and cooled down to a rolling temperature before being finish-rolled in the finishing train.
    Type: Grant
    Filed: April 13, 1998
    Date of Patent: November 21, 2000
    Assignee: SMS Schloemann-Siemag Aktiengesellschaft
    Inventors: Wilfried Bald, Dieter Rosenthal
  • Patent number: 5927127
    Abstract: The invention relates to an installation for cold rolling strip-shaped rolling material, with a reversing stand disposed between two reel-up or unreeling coils or reels, and a second reversing stand in the rolling line of the first reversing stand, with both stands capable of being adjusted corresponding to consecutive passes for performing the rolling process.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: July 27, 1999
    Assignee: SMS Schloemann-Siemag Aktiengesellschaft
    Inventors: Klaus Klamma, Wilfried Bald
  • Patent number: 5802902
    Abstract: A production plant for rolling hot strip from slabs produced by continuous casting, wherein a shearing machine is arranged following a continuous casting plant of the casting machine and in front of an equalizing furnace, and an additional shearing machine and a descaling unit are arranged following the equalizing furnace and in front of a rolling mill, and wherein a heating or cooling unit and a strip reeling unit of coiling machine are arranged following the rolling mill. A first roll stand group forming a continuously operating rolling train is composed of several four-high stands, for example, five four-high stands; individual heating devices are provided also between the successive four-high stands of this group of roll stands; in addition, the reeling unit or the reeling machine is configured as a double reeling machine.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: September 8, 1998
    Assignee: SMS Schloemann-Siemag Aktiengesellschaft
    Inventors: Dieter Rosenthal, Wilfried Bald
  • Patent number: 5746081
    Abstract: The invention relates to an installation for cold rolling strip-shaped rolling material, with a reversing stand disposed between two reel-up or unreeling coils or reels. Approximately 450,000 tons of hot rolled strip can be rolled in the course of one year into cold strips in such single stand reversing trains. In order to be able to roll 700,000 tons of cold strip per year, a second reversing stand in the rolling line of the first reversing stand is provided and both stands can be adjusted corresponding to consecutive passes for performing the rolling process.
    Type: Grant
    Filed: December 10, 1996
    Date of Patent: May 5, 1998
    Assignee: SMS Schloemann-Siegmag Aktiengesellschaft
    Inventors: Klaus Klamma, Wilfried Bald
  • Patent number: 5021265
    Abstract: A roll arrangement for the non-deforming treatment of moving web-type or strip-type products. The arrangement includes at least two rotatable rolls which are adjustable radially relative to each other. The arrangement is used, for example, for drying one or both surfaces of the product. The rolls are axially adjustable in opposite direction and each roll has slightly S-shaped or bottle-shaped contour over the entire length of the roll body, in such a way that the contours of two rolls arranged on both sides of a roll gap complement each other only in a certain relative axial position of these rolls. In other axial positions of the rolls, the roll gap becomes narrower either in the center or at the ends of the rolls, so that a uniform pressing action or other uniform non-deforming treatment of the product is possible over the entire width of the product independently of the bending of the rolls and/or deviations from the plane-parallelism of the surfaces of the product.
    Type: Grant
    Filed: March 16, 1989
    Date of Patent: June 4, 1991
    Assignee: SMS Schloemann-Siemag Aktiengesellschaft
    Inventors: Wilfried Bald, Hugo Feldmann, Manfred Pabst, Rudiger Fischer
  • Patent number: 4862570
    Abstract: An apparatus is provided for removing scale from a hot rolled steel strip by rolls acting by grinding and/or milling so that these rolls are uniformly effective in all regions of the steel strip and an appropriate uniform removal of the scale layer occurs. This is attained when driven grinding rolls adjustable toward the surfaces of the steel strip are provided of which at least two opposing rolls are axially slidable in opposite directions and have inversely oriented S-shape contours. These contours complement each other completely flawlessly in one definite position of the grinding rolls. In one such position the rolls provide a uniform engagement on both sides of a steel strip with a nearly rectangular profile.
    Type: Grant
    Filed: January 6, 1987
    Date of Patent: September 5, 1989
    Assignee: SMS Schloemann-Siemag Aktiengesellschaft
    Inventors: Wilfried Bald, Karl-Ernst Boucke, Hans Rommen, Manfred Fritz, Friedrich Hollmann
  • Patent number: 4841761
    Abstract: The rolling mill comprises a plurality of working rolls and supporting rolls or a plurality of working rolls, intermediate rolls and supporting rolls. The intermediate rolls with their mounts and the slender working rolls ussed with them in six-high operation are exchangeable with or replaceable by larger thicker working rolls for two-high operation. No contact can occur between the body of a working roll and the body of the adjacent supporting roll during use as a two-high mill. In two-high operation the mount of a working roll is provided with a spacer piece engaging against the mounting member of the adjacent supporting roll. The mounts of the thicker working rolls used in two-high operation can be fitted into the guide pieces which act as guides for the mounting pieces of the intermediate rolls when the rolling mill is used as a six-high mill.
    Type: Grant
    Filed: March 9, 1988
    Date of Patent: June 27, 1989
    Assignee: SMS Schloemann-Siemag Aktiengesellschaft
    Inventors: Erich Stoy, Wilfried Bald, Hans Rommen
  • Patent number: 4831854
    Abstract: The rolling mill for mechanical descaling of hot rolled steel is constructed according to the slidable roll process with reducing rolls so that a unform operation with different and/or changing shape steel strips can obtained. This is attained when the rolling mill has at least two rolls slidable in opposite directions whose body surfaces are constructed with S-shape contours positioned inversely to each other so that these contours compliment each other flawlessly in one certain axial relative position. When sliding the rolls in opposite directions in one case the contour is decreased in the center region of the steel strip and when slid in the opposite directions in the other case the contour is increased in the center region. Thus the rolls can be adjusted to fit a gently convex steel strip profile by axially sliding the rolls in opposite directions as also rolled strips with a thickness centrally reduced in comparison to that of the edge regions can by appropriate sliding of the rolls opposite each other.
    Type: Grant
    Filed: January 6, 1987
    Date of Patent: May 23, 1989
    Assignee: SMS Schloemann-Siemag Aktiengesellschaft
    Inventors: Wilfried Bald, Karl-Ernst Boucke, Hans Rommen, Manfred Fritz, Friedrich Hollmann
  • Patent number: 4736609
    Abstract: The rolls of a rolling mill, especially the working rolls, are horizontally shifted by a compact adjusting device, with use being made, as required, of guide pieces. The device is readily arranged in cylinder blocks, and the movements of the device can be easily monitored, transmitted, and set. The predetermined motions are carried out in rigidly controlled manner and no elastic yielding is allowed because of pressure plates extending in the windows of the base frame members. The pressure plates can be horizontally aligned and they cooperate with the holding elements which are to be shifted. The pressure plates are supported by wedges which can be shifted horizontally and transversely with respect to the plane of the frame, by way of pressure posts which operatively engage the pressure plates.
    Type: Grant
    Filed: August 14, 1986
    Date of Patent: April 12, 1988
    Assignee: SMS Schloemann-Siegmag Aktiengesellschaft
    Inventors: Gunter Schiller, Helmut Setzer, Wilfried Bald
  • Patent number: 4711116
    Abstract: A roll stand has a frame, a pair of small-diameter and substantially parallel working rolls defining a workpiece nip, and respective journal blocks supporting the working rolls in the frame for rotation about substantially parallel axes flanking the nip. These working-roll journal blocks and the respective working rolls can be axially shifted in the frame and the working rolls can be bent positively and negatively, that is respectively convex and concave toward the workpiece. A pair of large-diameter and substantially parallel backup rolls flank and bear toward the nip on the working rolls. Respective journal blocks support the backup rolls in the frame for rotation about substantially parallel axes flanking and generally coplanar with the working-roll axes. A strip is passed repeatedly in a multipass run through the nip generally perpendicular to the plane while the working rolls are pressed against the workpiece to reduce its thickness.
    Type: Grant
    Filed: September 25, 1986
    Date of Patent: December 8, 1987
    Assignee: SMS Schloemann-Siemag AG
    Inventor: Wilfried Bald
  • Patent number: 4674313
    Abstract: A roll stand has a frame, an upper backup roll and a lower backup roll rotatable in the frame about respective vertically spaced axes, and an upper working roll and a lower working roll flanked by and operatively engaging the respective backup rolls. A workpiece normally passes horizontally through the nip formed by the working rolls. Actuators can urge the backup rolls toward each other with a high force and with a low force. Respective upper and lower drives are connected to the respective backup rolls and energizable for rotating same and thereby pulling the workpiece engaged between the working rolls through the roll stand. A clutch is connected between one of the drives and the respective backup roll and is openable to rotationally disconnect the one drive from its backup roll. A controller is connected to the one drive and the clutch for deenergizing the one drive and opening the clutch for low-force rolling. For high-force rolling the clutch is closed and both drives are energized.
    Type: Grant
    Filed: March 29, 1985
    Date of Patent: June 23, 1987
    Assignee: SMS Schloemann-Siemag AG
    Inventors: Wilfried Bald, Klaus Klamma
  • Patent number: 4669296
    Abstract: A roll stand has a frame, a pair of small-diameter and substantially parallel working rolls defining a workpiece nip, and respective journal blocks supporting the working rolls in the frame for rotation about substantially parallel axes flanking the nip. These working-roll journal blocks and the respective working rolls can be axially shifted in the frame and the working rolls can be bent positively and negatively, that is respectively convex and concave toward the workpiece. A pair of large-diameter and substantially parallel backup rolls flank and bear toward the nip on the working rolls. Respective journal blocks support the backup rolls in the frame for rotation about substantially parallel axes flanking and generally coplanar with the working-roll axes. A strip is passed repeatedly in a multipass run through the nip generally perpendicular to the plane while the working rolls are pressed against the workpiece to reduce its thickness.
    Type: Grant
    Filed: December 5, 1983
    Date of Patent: June 2, 1987
    Assignee: SMS Schloemann-Siemag AG
    Inventor: Wilfried Bald
  • Patent number: 4631948
    Abstract: A rolling stand has a support frame, a pair of small-diameter working rolls defining a workpiece nip open perpendicular to the plane and rotatable about respective horizontal, parallel, and vertically spaced axes. A pair of large-diameter backup rolls are rotatable about respective axes parallel to and vertically flanking the working-roll axes. These backup-roll axes define a vertical plane offset from the working-roll plane. In addition each backup roll bears vertically on the respective working roll and a drive counterrotates the rolls of each roll pair to draw an elongated workpiece of predetermined maximum width generally perpendicular to the planes through the nip. The working rolls are longer than the maximum workpiece width and have end portions projecting axially beyond the workpiece. The rolls are pressed vertically toward the nip to compress and deform the workpiece thereat.
    Type: Grant
    Filed: April 2, 1984
    Date of Patent: December 30, 1986
    Assignee: SMS Schloemann-Siemag AG
    Inventors: Wilfried Bald, Erich Stoy, Hans Rommen, Friedrich Hollmann
  • Patent number: 4598566
    Abstract: A roll stand has a frame and a pair of small-diameter and substantially parallel working rolls defining a workpiece nip. Thus a strip to be rolled passes in a horizontal upstream-to-downstream direction through the nip. Respective pairs of upper and lower upstream support levers have outer ends pivoted on the frame and inner ends downstream therefrom and respective pairs of upper and lower downstream support levers have outer ends pivoted on the frame downstream of the nip and inner ends pivoted on the inner ends of the upstream levers. Respective pairs of journal blocks mounted on the inner ends of the levers support the working rolls for rotation about substantially parallel axes flanking the nip. A pair of large-diameter and substantially parallel backup rolls flank and bear toward the nip on the working rolls and are rotatable in the frame about substantially parallel axes flanking the working-roll axes and offset therefrom in the direction.
    Type: Grant
    Filed: March 7, 1984
    Date of Patent: July 8, 1986
    Assignee: SMS Schloemann-Siemag AG
    Inventors: Wilfried Bald, Erich Stoy, Hans Rommen, Hans-Friedrich Heisterkamp
  • Patent number: 4563888
    Abstract: A roll stand has a frame having two sides spaced apart transversely of a workpiece travel direction and formed with throughgoing windows and a pair of vertically spaced traverses extending between the frame sides. Two outer backup rolls centered on parallel axes transverse to the direction having journal blocks vertically displaceable and guided in the windows of the frame sides. Upper and lower guide elements vertically displaceable in the windows between the outer-roll blocks carry the journal blocks of two inner backup rolls. Pairs of positioning actuators in the windows vertically between the inner-roll blocks carry supports which carry second upper and lower guide elements vertically displaceable on the supports. The positioning actuators are expansible and contractile to displace the second guide elements in the direction. Two working rolls between and parallel to the other roll axes each have two journal blocks fitted to and axially slidable in the second guide elements.
    Type: Grant
    Filed: October 3, 1984
    Date of Patent: January 14, 1986
    Assignee: SMS Schloemann-Siemag AG
    Inventors: Wilfried Bald, Hans Rommen, Erich Stoy