Abstract: The present invention relates to a rack change system for changing of roller racks of a rolling block with a rail system along which change carriages can be moved, wherein the rail system includes a first track and a second track, which extend in different directions and are connected to one another via a switch, wherein the first track runs parallel to the rolling line of the rolling block, wherein a roller rack can be moved from the rolling block to the change carriage or a roller rack can be moved from the change carriage to the rolling block when the change carriage is standing on the first track and/or on the switch.

Abstract: The invention relates to a device for moving a roll stand into or out of a roll stand receptacle of a rolling line, comprising a carrier element for entraining an entrainment element of a roll stand and a conveying element, wherein the carrier element is moved along a predetermined curved path.

Abstract: The invention relates to a rolling mill for rolling stock to be rolled (6), having a planetary cross-rolling mill (20) and a subsequent further rolling mill in the rolling direction, the subsequent mill comprising a mandrel rod (10) having a length that is larger than the distance between the planetary cross-rolling mill (20) and the further rolling mill in the rolling direction.

Abstract: A rolling stand includes at least one roller having a roller journal which is rotatably supported by an eccentric bushing which in turn is rotatably supported by a low-friction bearing unit. An adjusting mechanism exerts an adjusting force on the eccentric bushing for rotating the eccentric bushing with respect to the housing and maintaining the eccentric bushing in a desired position. In order to determine a rolling force in the rolling stand, the eccentric bushing is rotated to a desired position relative to the housing by the adjusting mechanism, and an effective adjusting force in the adjusting mechanism is measured when the eccentric bushing is held in the desired position. The rolling force can then be ascertained on the basis of the measured adjusting force.

Abstract: A roll stand for rolling bar-shaped or tubular stock, having a stand housing, having at least one roll which is arranged on a roll shaft rotatably mounted in the stand housing and is connected in a rotationally fixed manner to the roll shaft via a frictional connection, in which roll stand the roll is held in its axial position on the roll shaft in a positive-locking manner by sleeve elements adjoining axially with respect to the roll shaft.

Abstract: A rolling stand includes at least one roller having a roller journal which is rotatably supported by an eccentric bushing which in turn is rotatably supported by a low-friction bearing unit. An adjusting mechanism exerts an adjusting force on the eccentric bushing for rotating the eccentric bushing with respect to the housing and maintaining the eccentric bushing in a desired position. In order to determine a rolling force in the rolling stand, the eccentric bushing is rotated to a desired position relative to the housing by the adjusting mechanism, and an effective adjusting force in the adjusting mechanism is measured when the eccentric bushing is held in the desired position. The rolling force can then be ascertained on the basis of the measured adjusting force.

Abstract: The roll stand having at least one roll shaft 2, which carries a roll 6 and is subdivided into sectional shafts 3, 4 for the purpose of being able to change the roll, comprises at least one labyrinth-seal arrangement which is arranged in an annular gap 23, 24 formed between the respective sectional shaft 3, 4 and a bearing device for the roll shaft.

Abstract: A rolling mill for rolling or sizing of metallic pipes, bars and wires has a plurality of rolling units which are arranged on a straight line close to one another and can be exchanged in total, partly or individually, each of the rolling units having at least three rolls which are arranged in a star-like configuration around a rolling mill axis, drive shafts and motors each driving a respective one of the rolls in all the rolling units, a rolling unit housing provided for the rolling units, roll bearings provided for the rolls, and multi-part roll shafts provided for supporting the rolls so that the rolls can be exchanged without dismounting of the rolling unit housing and the roll bearings, the rolling units holding the rolls inside and outside of the rolling mill in their operational positions.

Abstract: The roll stand having at least one roll shaft 2, which carries a roll 6 and is subdivided into sectional shafts 3, 4 for the purpose of being able to change the roll, comprises at least one labyrinth-seal arrangement which is arranged in an annular gap 23, 24 formed between the respective sectional shaft 3, 4 and a bearing device for the roll shaft.

Abstract: An arrangement for inclined rolling of tube-shaped or bar-shaped rolling products comprises at least two rollers adapted to receive therebetween a rolling product so as to determine a longitudinal axis of the rolling product, the rollers are driveable and are rotatable about said longitudinal axis. The rollers have roller axes inclined at an inclination angle relative to the longitudinal axis, the roller axes being inclined in such a plane which, when considered in or against the longitudinal axis, extends parallel to the longitudinal axis at a radial distance from it, and a driving unit for driving the rollers. The driving unit includes a sun gear and drive gears provided with an axis-offset bevel gear toothing and surrounding a respective one of the roller axes, the drive gears engaging with the sun gear so that the rollers are driven by the sun gear through the drive gears.

Abstract: A rolling unit for a rolling mill for rolling or sizing metal pipes, bars or wires has at least three rolls arranged in a star arrangement. Each roll has a separate drive mechanism and is rotatably mounted on bearings on both sides of it. The rolls are adjustable radially together with the bearings. The improved rolling unit has smaller outside dimensions but can take a higher load. The number of individual rolling unit parts is also reduced as well as manufacturing and assembly expenses. For this purpose the bearings of the roll shafts are mounted in respective eccentric sleeves, whose rotational position may be adjusted manually and in a stepwise manner between several rotational positions.

Abstract: Rolling of metallic products to be heated to form wires, rods and seamless pipes, includes rolling of wires or rods as well as rolling of seamless pipes on a same rolling apparatus, and using a part of aggregates of the same rolling apparatus both for rolling of wires or rods and for rolling of pipes.

Abstract: A roller guide for a roll stand for precise guiding of a rod-shaped or wire-shaped rolling product in a caliber opening formed by rolls which engage the rolling product from an outer side and are distributed on its periphery, the roller guide has angular levers provided with legs on which the rollers are rotatably supported, turning pins on which the angular levers are turnable and which have turning axes extending transversely to a roll axis, an adjusting bushing by which the levers are jointly turnable so as to jointly displace the rollers radially to the roll axis, a coupling rod arranged between the adjusting bushing and each of the levers, the coupling rod being hingedly engaged on a leg of the lever which faces away from the rollers, and an angle between an engaging point between the coupling rod on the lever and a rotary axis of the roller with an apex point on the turning axis of the turning pin amounting to between 80 and 92.degree..

Abstract: A roll block for rolling wire, rods, pipes and flat metal material to be rolled, has a plurality of exchangeable roll stands located closely next to one another in a roll line and each having a plurality of rollers, a plurality of C-shaped frames holding the roll stands and positioned closely next to one another, turning moments transfer components provided in the C-shaped frames for driving the rollers, a number of the C-shaped frames corresponding to a maximum number of the roll stands, a common stand housing located at a drive side of the C-shaped frames and spaced therefrom, intermediate transmissions located at a front side of the common stand housing facing the C-shaped frames in a separately changeable manner, driving motors located at a rear side of the common stand housing remote from the C-shaped frames and coupled to the intermediate transmissions in a separately exchangeable manner, the intermediate transmissions and the C-shaped frames having mutually coupled shafts which bridge a spacing between

Abstract: An arrangement for inclined rolling of tube-and bar-shaped rolling articles has two or more driven rollers rotatable about a longitudinal axis of a rolling article and supported in or on a rotor which surrounds the rolling article. The rotor is arranged in a stationary housing which is closed from all sides to provide a compact and efficient arrangement allowing an especially high rotary speed. Moreover, the arrangement with the inclined rollers rotatable about the longitudinal axis of the rolling product allow a fast exchange of the whole arrangement by a pre-assembled second arrangement so that stoppage of the whole arrangement during a roller exchange or a change in the roller adjustment is substantially reduced.

Abstract: A method and a tool for dismounting and mounting a roller ring retained between two flanges of a partition supporting shaft by a pulling anchor with an axial pretensioning in a roller stand simplify and accelerate corresponding operations, since a single tool is used for removing and establishing a pulling anchor pretensioning, screwing in and screwing out and axially displacing the pulling anchor, releasing the roller ring from the flanges and pressing the roller ring against the flanges, during a single setting of the tool.

Abstract: A rolling block for rolling metallic bars or wires, has a plurality of rolling frames arranged on successive frame spots and each having three rollers arranged in a star-like manner and radially adjustable with respect to a longitudinal axis of a rolling product, a drive for driving the rollers and including separately regulatable motors, the rolling frames including less rolling frames than the frame spots, a first one of the rolling frames which is provided with a drawing pass being located at a first frame spot provided at an inlet side and having a separate front one of the motors, all of the rolling frames provided with finishing passes being located at last frame spots at an outlet side and driven by at least one rear motor, and all remaining rolling frames provided with drawing passes being located at frame spots which immediately follow the first frame spots or at frame spots immediately preceding the rolling frames with finishing passes and driven jointly by at least one central motor.

Abstract: For adjusting of three caliber opening rollers or guiding rolls, a light source is arranged on the one side of the roller or guiding roll, a device is located at another side of the roller or the guiding roll and receives a shadow image of a caliber contour and has a turnable, displaceable and arrestable bar template. The bar template has at least one polygon which corresponds to the number of rollers or guiding rolls of a caliber and sides which are offset from one another with the same angular position as rotary axes of the rollers or guiding rolls, and center points of inscribed circles of several such polygons are located on one another.

Abstract: For adjusting of three caliber opening rollers or guiding rolls, a light source is arranged on the one side of the roller or guiding roll, a device is located at another side of the roller or the guiding roll and receives a shadow image of a caliber contour and has a turnable, displaceable and arrestable bar template. The bar template has at least one polygon which corresponds to the number of rollers or guiding rolls of a caliber and sides which are offset from one another with the same angular position as rotary axes of the rollers or guiding rolls, and center points of inscribed circles of several such polygons are located on one another.

Abstract: Ingots hot from rolling are pierced to form a hollow ingot by means of an internal tool of a press or skew-rolling line, and are subsequently elongated to form a tubular bloom by a stretching unit provided with a mandrel rod, and are finally finish-rolled. When inserting or withdrawing the internal tool into or out of the hollow ingot or the mandrel rod into or out of the tubular bloom, inert gas is introduced into the freed interior space in order to prevent scaling of the interior wall of the tubular bloom.