Sms Schloemann-siemag Aktiengesellschaft

Schloemann-siemag Aktiengesellschaft

Sms Demag Ag

Wilfried Bald

Hans Rommen

Erich Stoy

Klaus Klamma

Dieter Rosenthal

Friedrich Wilhelm Hollmann

Manfred Fritz

Karl-Ernst Boucke

Jürgen Seidel

Hugo Feldmann

Manfred Pabst

Gunter Schiller

Helmut Setzer

Rudiger Fischer

Hans Polking

Hans-Friedrich Heisterkamp

The aim of the invention is to improve known roll stands () which are characterized by working rolls () 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. To this end, the support rolls () and the working rolls () are arranged in an axially displaceable manner in the roll stand (), the position of at least one of the working rolls () can be adjusted in the discharge direction () of the roll strip (), and that the support rolls () and the working rolls () are provided with a curved contour (continuously variable crown which is determined by an at least second order polynomial) which extends essentially over the whole surface length of the roll, said contours being staggered by 180&#xb0; in relation to each other and respectively embodied in such a way that both contours of the working rolls () complete each other to form a symmetrical contour of the roll gap.

Roll stand for producing plane roll strips having a desired strip profile superelevation

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.

Hot-rolling mill

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.

Reversing compact installation for cold rolling strip-shaped rolling material

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.

Method of and apparatus for manufacturing hot rolled steel strips, in

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.

Reversing compact installation for cold rolling strip-shaped rolling

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.

Production plant for continuously or discontinuously rolling hot strip

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.

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.

Roll arrangement for non-deforming treatment of moving web-type products

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. In fact the rolls by appropriate axial sliding and application of bending forces if necessary may be adjusted to fit the actual profile of the steel strip so that a uniform engagement on the scale layer is guaranteed and a locally excessive grinding and/or milling in the central region of the steel strip is avoided.

Apparatus for removal of scale from hot-rolled steel strip

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.

Multipurpose rolling mill

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.

Steel strip descaler

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.

Adjusting device for rolling mill rolls

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. The working rolls are axially displaced relative to the workpiece a plurality of times during the run to change the region of contact between the workpiece edges and the working rolls during the run. The working rolls are also bent at least to maintain the workpiece thickness downstream of the nip generally uniform.

Method of operating a four-high roll stand with bendable and axially

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.

Growing community of inventors

Hilchenbach, Germany

Wilfried Bald