Apparatus for Manufacturing Metal Material by Rolling

Abstract

A method and roll segment ( 1 ) for determining core solidification and/or the liquid crater tip in the continuous casting of metals, particularly steel materials, inside a roll segment ( 1 ) of a support roller gantry ( 2 ), wherein the upper frame ( 3 ) thereof supporting the upper rollers ( 4 ) can be drivingly adjusted via hydraulic piston-cylinder units ( 6 ), which are arranged in the corners ( 5 a - 5 d ) of a polygon, counter to the lower rollers ( 8 ) of a lower frame ( 7 ), according to the thickness of the billet, working in a more accurate manner, using an independent pair ( 14 ) of piston-cylinder units ( 6 ) with an external or internal measuring device ( 13 a, 13 ) in order to adjust a rotationally driven, individual upper roller ( 4 ), taking into account the measuring values for positional adjustment or force adjustment in order to determine the position of core solidification and/or the liquid crater tip in the cast billet.

1 . Method for determining the core solidification and/or the tip of the liquid crater in the continuous casting of metals, especially steel, in a roll segment ( 1 ) of a support roll frame ( 2 ), whose upper frame ( 3 ), which supports the upper rolls ( 4 ), is driven towards the lower rolls ( 8 ) of a lower frame ( 7 ) by hydraulic piston-cylinder units ( 6 ) installed at the vertices ( 6   a ,  6   b ,  6   c ,  6   d ) of a polygon to adjust to the given strand thickness, wherein the measured values for determining the position of the core solidification and/or the position of the tip of the liquid crater in the cast strand are determined by means of an independent pair ( 14 ) of piston-cylinder units ( 6 ) with a measuring device ( 13 ,  13   a ) for adjusting a crossbeam ( 20 ), on which a single, rotationally driven upper roll ( 4 ) is provided, by means of the movement of the upper frame and/or an evaluation of the four position values in conjunction with the resulting force values of the four hydraulic cylinders ( 6 ), wherein the selection of a position value of the single upper roll ( 4 ) with subsequent evaluation of the resulting position or the selection of the force values of the single upper roll ( 4 ) of a roll segment ( 1 ) with subsequent evaluation of the resulting position in several selected roll segments ( 1 ) is evaluated for determining the core solidification or the tip of the liquid crater, and the position of the tip of the liquid crater is used as process-engineering feedback to automatically position-control roll segments ( 1 ) and to an independent installation for roll segments ( 1 ) without automatic position control.  
     
     
         2 . Method in accordance with  claim 1 , wherein the measured values are simultaneously measured in several roll segments ( 1 ) with at least one pair ( 14 ) of independent piston-cylinder units ( 14   a ,  14   b ) in each case, and all of the measured data is processed to obtain a mean value.  
     
     
         3 . Support and drive roll frame ( 2 ) consisting of several roll segments ( 1 ) in continuous casting installations for metals, especially steel materials, with hydraulic piston-cylinder units ( 6 ) arranged polygonally in pairs, in which the roll separations, which are set to the given strand thickness, are adjusted on the movable side ( 17 ) of an adjustable upper frame ( 3 ), which supports the upper rolls ( 4 ), towards the lower rolls ( 8 ) of the lower frame ( 7 ), which constitutes the stationary side ( 18 ), wherein an independent pair ( 14 ) of piston-cylinder units ( 6 ) for adjusting a crossbeam ( 20 ), on which are provided a single, rotationally driven upper roll ( 4 ), which rests on the cast strand, and a measuring device ( 13 ) for measured values for determining the position of the core solidification and/or the position of the tip of the liquid crater, wherein the measuring device ( 13 ) is formed as an external or internal measuring device ( 13   a ) of the independent pair ( 14 ) of piston-cylinder units for measured values based on the automatic position or force control, and a unit is formed which consists of the individual upper roll ( 4 ), the independent pair ( 14 ) of piston cylinder units ( 6 ), the crossbeam ( 20 ), and the measuring device ( 13 ).  
     
     
         4 . Support and drive roll frame in accordance with  claim 3 , wherein, for an odd total number of upper rolls ( 4 ) and lower rolls ( 8 ), at least a middle upper roll ( 4 ) and the opposite lower roll ( 8 ) are driven.  
     
     
         5 . Support and drive roll frame in accordance with  claim 3 , wherein a roll segment ( 1 ) with the measuring device ( 13 ,  13   a ) is arranged as the last roll segment ( 1 ) in the direction of casting.