Finish-Rolling Device, As Well As Method For Manufacturing A Magnesium Strip In Such A Finish-Rolling Device

Abstract

A finishing rolling device for manufacturing a thin magnesium strip based on a coil fed to the device includes a roll stand for accommodating at least two working rolls ( 32, 33 ) that define a roll gap. A first coiler accommodates the coil and feeds the magnesium strip to the roll gap and a second coiler for winding up the magnesium strip after it passes through the roll gap. The first coiler is provided with a heating device and a hood arrangement that shields the coil or the magnesium strip against heat radiation. The hood arrangement of the first coiler features a coil passage opening for introducing the coil into the hood arrangement on its housing side that faces away from the roll stand.

1 . A finish-rolling device for manufacturing a thin magnesium strip based on a coil that is fed to the finish-rolling mill, particularly after a preheating process in a preheating furnace, said finish-rolling device comprising:
 a roll stand for accommodating at least two working rolls that define a roll gap;   a first coiler for accommodating the coil and feeding the magnesium strip to the roll gap, wherein the first coiler is provided with a heating device and a hood arrangement that shields the coil or the magnesium strip against heat radiation, and the hood arrangement features a coil passage opening for introducing the coil into the hood arrangement on a side of the hood arrangement facing away from the roll stand; and   a second coiler for winding up the magnesium strip after it passes through the roll gap.   
     
     
         2 . The finish-rolling device according to  claim 1 , in which the heating device is arranged on the hood arrangement. 
     
     
         3 . The finish-rolling device according to  claim 1 , in which the hood arrangement of the coiler features a spool passage opening on the housing side that faces a floor space of the finish-rolling device in order to respectively introduce and remove a spool for accommodating the coil. 
     
     
         4 . The finish-rolling device according to  claim 3 , in which a spool supply device for supplying at least one spool is provided underneath the floor space in the form of a subsurface arrangement, wherein this spool supply device features a spool handling device that serves for respectively introducing and removing a spool into/from a spool receptacle device of the coiler situated in the hood arrangement. 
     
     
         5 . The finish-rolling device according to  claim 4 , in which the spool supply device is provided with a heating device for heating the spools. 
     
     
         6 . The finish-rolling device according to  claim 4 , in which the spool supply device comprises a horizontal conveyor for magazining a plurality of spools and conveying the spools into a transfer position, and in that the spool handling device features a vertical conveyor for conveying the spools between the transfer position and a wind-up position in the spool receptacle device. 
     
     
         7 . The finish-rolling device according to  claim 1 , in which the working rolls and/or the backup rolls that support the working rolls are realized in the form of heatable rolls. 
     
     
         8 . The finish-rolling device according to  claim 1 , in which at least the second coiler features a heatable coil receptacle device. 
     
     
         9 . The finish-rolling device according to  claim 1 , in which at least the second coiler is provided with a heatable wind-up device. 
     
     
         10 . A method for manufacturing a thin magnesium strip in a finish-rolling device based on a coil that is fed to the finish-rolling device, particularly after a preheating process in a preheating furnace, said method comprising:
 conveying a magnesium strip through a roll gap formed in a roll stand between two working rolls in the reversing mode such that two coilers that accommodate the roll stand between one another are alternately operated as an unwinding device and a wind-up device;   shielding the coil accommodated in the first coiler with a hood arrangement that respectively shields the coil accommodated in the coiler and the magnesium strip conveyed through the roll gap against heat radiation during the operation of the finish-rolling device; and   heating at least one of the coil and the magnesium strip by means of a heating device after introduction of the coil into the hood arrangement through a coil passage opening on a housing side of the hood arrangement that faces away from the roll stand.   
     
     
         11 . The method according to  claim 10 , in which the coiler arranged on the inlet side of the roll stand is loaded with a coil that was heated, in particular, in a preheating furnace and is arranged on a spool in such a way that the coil is transferred to a coil buggy, if applicable, from the preheating furnace and introduced into the hood arrangement by means of the coil buggy through the coil passage opening that faces away from the roll stand in order to be accommodated in the coiler. 
     
     
         12 . The method according to  claim 10 , in which the spool situated within the hood arrangement is removed from a spool receptacle device of the coiler by means of a spool handling device that is arranged underneath a floor space of the finish-rolling device after the magnesium strip has been unwound from the spool, wherein the wound-up magnesium strip is simultaneously transported from the coiler into a coil depositing station by means of the coil buggy. 
     
     
         13 . The method according to  claim 10 , in which the spool receptacle device of the coiler on the outlet side of the roll stand is loaded with a spool that was preheated in the spool supply device by means of the spool handling device while a coil is loaded into the coiler on the inlet side of the roll stand. 
     
     
         14 . The method according to  claim 10 , in which the working rolls and/or the backup rolls for supporting the working rolls used in the roll stand are preheated outside the roll stand prior to the operation of the roll stand for manufacturing the magnesium strip.