Abstract:
An apparatus for straightening metal strips, including a first, upper group and a second, lower group of straightening rollers arranged in each case immediately in succession in a strip running direction, and a group of individually controllable actuators arranged alongside one another in a transverse direction. An axial bending profile of at least a first of the straightening rollers is settable by the group of actuators. At least one second group of individually controllable actuators arranged alongside one another in the transverse direction is provided. An axial bending profile of the least a second of the straightening rollers, which is in particular different from the bending profile of the first bending roller, is settable by the second group of actuators.
Abstract:
A method for operating a blowing lance for blowing a gas in a metallurgical vessel, wherein the head of the blowing lance includes at least one supersonic nozzle, operating parameter measurement signals used for the purpose of process control are continuously acquired. The inlet pressure and/or the inlet temperature of the gas at the supersonic nozzle and/or the vibration amplitude and/or the vibration frequency of the blowing lance and/or the time at which ignition occurs during the oxygen blowing process and/or the location at which ignition occurs during the oxygen blowing process is detected and/or measured in the head of the lance by a detector or sensor arranged in the head of the lance near the supersonic nozzle during operation of the blowing lance. The measurement signal(s) are transmitted to a control unit connected to the detector or sensor and made available for controlling the operation of the blowing lance.
Abstract:
In order to simplify roll adjustment in a roll stand when changing the rolls, a roll stand absorbs rolling forces of at least three rolls mounted on both sides in bearing seats of the roll stand that absorb rolling forces, in each instance. At least the bearing seats of one roll are disposed in a stand body jointly with a bearing seat of another roll, in each instance. One of the stand bodies has fixed bearings of the two related rolls, in each instance, and/or one of the stand bodies has floating bearings of the two related rolls, in each instance.
Abstract:
The invention relates to a rolling mill defining a rolling axis and comprising rolling stations. At least one rolling station comprises a fixed structure, a roll-holder cartridge and three actuators. The cartridge is connected removably to the fixed structure and comprises three rolling rolls. The rolls are movable radially and rotatable about three respective axes. Three actuators of the single-stroke type are mounted on the fixed structure and comprise pistons movable along respective radial axes to impart a force on the rolls for rolling an article. Three gearmotors provide the rolls, by means of spindles, with the torque for feeding the article along the rolling axis. When two pistons are completely retracted, a path is created free from obstacles allowing the cartridge to pass out laterally. Then, one spindle may be subject to a rotation-translation to be removed from the path, the respective gearmotor being fixed on its base.
Abstract:
A drawing apparatus for drawing metal and articles has at last one drawing carriage and a linear motor complex which determines the pattern of movement of that carriage and hence of the drawing operation.
Abstract:
A rolling system has a plant producing a plurality of continuously advancing and parallel hot metal strands, a vertical-roll stand receiving the strands, and a horizontal-roll stand. The vertical-roll stand has an upstream row of vertical pairs of rolls and, immediately downstream therefrom in a movement direction of the strands, a downstream row of vertical pairs or rolls with nips offset laterally from the nips of the upstream row. Every other strand passes by the upstream roll pairs and through the nips of the downstream roll pairs and the remaining strands pass through the nips of the upstream roll pairs and by the downstream roll pairs. The horizontal-roll stand is aligned with the vertical-roll stand and has a pair of horizontal rolls forming a plurality of nips aligned in the direction with the vertical-roll stand nips.
Abstract:
A rolling train for structural shapes in which at least on one side of a train having a plurality of mill stands, e.g. universal mill stands, a detector is provided for the actual profile of the rolled product. The actual profile is compared with a setpoint profile and corrected setpoint values for the operating parameters of the individual stands are generated for a corrected subsequent rolling operation or even the same rolling operation, appropriately weighted for the contribution of the various stands to the rolling effect.
Abstract:
In a method for casting prefabricated products in a continuous casting device, having a casting mold and a strand guide downstream of the casting mold, wherein the strand guide has rolls positioned opposite one another in pairs for supporting and guiding the solidifying cast strand. The motor torques of the drives are maintained at a level as equal as possible below a permissible torque limit value relative to a loadability of the strand shell. For a single drive and corresponding drive roll the permissible torque limit value is measured by continuously increasing the drive torque starting at zero and monitoring the rotational speed of the drive roll, while the remaining drive rolls are controlled to a preset nominal casting speed. For a superproportional increase of the rotational speed, the torque limit value is determined and the process is stopped.
Abstract:
A method for planning production in a production plant having a plurality of separate, successive plant parts is disclosed. The products to be manufactured in the production plant are available in a production list and/or production sub-lists are available for the separate, successive plant parts or are established from the production list. The method includes analyzing the production sub-lists and determining production sequences for the relevant plant parts. Those products that can be manufactured in the relevant plant part and can be manufactured without restricting or interrupting production in the plant part are combined in each production sequence. The method further includes analyzing the production sequences of the plant parts and determining at least one overall production sequence for the production plant. Products that are included for all the plant parts in a joint production sequence are included in an overall production sequence.
Abstract:
A flatness-measuring device for a hot-rolled strip within a hot-rolling mill includes an entry-side deflection roller and an exit-side deflection roller. A central deflection roller is arranged between the entry-side deflection roller and the exit-side deflection roller. The central deflection roller is used as a flatness-measuring roller. To prevent the hot-rolled strip from departing laterally during a flatness measurement, the flatness-measuring device has a sensing apparatus for sensing an actual position of the hot-rolled strip. An adjusting apparatus is connected to the sensing apparatus and to at least one of the deflection rollers. The flatness-measuring device is designed to vary an angle between a longitudinal central axis of the deflection roller respectively connected to the adjusting apparatus and a longitudinal axis of the flatness-measuring device based on a deviation of the actual position of the hot-rolled strip from a predefined target position.