Method and device for producing medium-thickness plates with high thickness precision through cvc steckel mill

Abstract

A method and a device for producing medium-thickness plates with high thickness precision through a CVC steckel mill. The method includes the following: heating a blank in the heating furnace, and roughly descaling by the descaling machine; enabling the blank to enter the rolling mill, after multi-pass flat rolling, carrying out multi-pass rolling, carrying out linkage rolling of the rolling mill and the coiler furnaces in the rolling process, and enabling the rolling tension to reach a set value; controlling the temperatures of the coiler furnace to a set value in the coiling process; and in the rolling process, starting 30-70% of the original flow of cooling water of the working roll of the rolling mill; and after rolling is finished, finishing the production process through the laminar cooling system and the hot straightening machine respectively.

What is claimed is: 
     
         1 . A method for producing medium-thickness plates with high thickness precision through a CVC steckel mill, the method comprising:
 heating a blank in a heating furnace, and roughly descaling using a descaling machine;   enabling the heated blank to enter a rolling mill, after multi-pass flat rolling, carrying out multi-pass rolling, carrying out linkage rolling of the rolling mill and a coiler furnace in the rolling process, and enabling a rolling tension to reach a set value, controlling the temperatures of the coiler furnace to a set value in the coiling process, and in the rolling process, starting 30-70% of an original flow of cooling water of a working roll of the rolling mill; and   finishing, after the rolling process is finished, the production process through a laminar cooling system and a hot straightening machine, respectively.   
     
     
         2 . The method of  claim 1 , wherein in the rolling mill, a temperature range of the coiler furnace is controlled between 850° C. and 950° C. 
     
     
         3 . The method of  claim 1 , wherein in the rolling mill, the rolling tension between the coiler furnace and the rolling mill is in a range between 15 tons and 25 tons. 
     
     
         4 . The method of  claim 1 , wherein in the rolling mill:
 an axial movement amount of the working roll is changed in the last three rolling passes, and   a roll bending force is increased or decreased aiming at edge waves and medium waves of a steel plate in the rolling process.   
     
     
         5 . A device for producing medium-thickness plates with high thickness precision through a CVC steckel mill using the method of  claim 1 , the device comprising:
 a heating furnace;   a descaling machine;   a rolling mill;   a laminar cooling system and a hot straightening machine which are sequentially arranged;   a front coiler furnace arranged at a front end of the rolling mill; and   a rear coiler furnace arranged at a rear end of the rolling mill.