Method for Rolling Rolling Stock Having a Transitional Region

Abstract

The invention relates to a method for rolling a product in a rolling train comprising at least two roll stands having a roll gap, the product to be rolled comprising a transition region. If a critical transition region crosses the rolling train, the roll gaps of the roll stands are successively opened and closed according to the position of the transition region moving at speed through the rolling train, in the direction of the direction of travel of the conveyor. The opening of the roll gaps occurs parallel to the position of the critical transition region when the product is displaced. A transition region is critical when the structure requires the roll gaps to be opened. The inventive opening of the roll gaps, when the device is moving, enables the controlled transition of a product to be rolled with extreme variations in dimensions and/or hardness, for a shorter length.

1 .- 13 . (canceled)  
   
   
       14 . A method for rolling a material in a mill train, comprising: 
 providing a rolling stock material having a transitional region;    providing a plurality of roll stands each having a roll gap; and    opening the roll gap of at least one of the roll stands as required by a physical characteristic of the transitional region as a function of a position of the transitional region of the rolling stock moving at a speed through the mill train and wherein a tension in the rolling stock in front of and behind the one of the roll stands is equalized before opening the roll gap.    
   
   
       15 . The method as claimed in  claim 14 , wherein the roll gap is opened before the transitional region has reached the roll stand.  
   
   
       16 . The method as claimed in  claim 15 , wherein only one of the roll gaps in the mill train is opened at a time.  
   
   
       17 . The method as claimed in  16 , wherein the roll gap is-closed when the transitional region has traversed the roll stand.  
   
   
       18 . The method as claimed in  claim 17 , wherein a rotating speed of a roll of one of the roll stands is matched to a linear speed of the rolling stock when the roll gap is closed.  
   
   
       19 . The method as claimed in  claim 18 , further comprising measuring the linear speed of the rolling stock.  
   
   
       20 . The method as claimed in  claim 18 , wherein the linear speed of the rolling stock is determined by a model.  
   
   
       21 . The method as claimed in  claim 18 , wherein a reduction in a roll gap is regulated with regard to the position of the transitional region relative to the mill train.  
   
   
       22 . The method as claimed in  claim 21 , wherein the roll gap is increased by opening a screw-down device before the transit of the transitional region.  
   
   
       23 . The method as claimed in  claim 22 , further comprising adjusting relational speeds of drives of the other roll stands of the mill train.  
   
   
       24 . The method as claimed in  claim 23 , wherein the tension of the rolling stock in front of the roll stand is regulated based on a rotating speed of drives of the remaining roll stands if the reduction in the roll stand has been reduced around a critical transitional region.  
   
   
       25 . A computing device, comprising: 
 a random access memory module;    a non-volatile data storage device operatively connected to the memory module; and    an executable program stored in the storage device that controls a mill train, by: 
 providing a plurality of roll stands each having a roll gap, and  
 opening the roll gap of at least one of the roll stands when a physical characteristic of a transitional region of a roll stock material requires as a function of the position of the transitional region of the rolling stock moving at a speed through the mill train,  
 wherein a tension in the rolling stock in front of and behind the roll stand is equalized before opening the roll gap.  
   
   
   
       26 . The computing device as claimed in  claim 25 , further comprising opening the roll gap before the transitional region reaches the roll stand.  
   
   
       27 . The computing device as claimed in  claim 26 , wherein only one of the roll gaps in the mill train is opened at a time.  
   
   
       28 . The computing device as claimed in  claim 27 , further comprising closing the roll gap when the transitional region has traversed the roll stand.  
   
   
       29 . The computing device as claimed in  claim 28 , wherein a rotating speed of a roll of one of the roll stands is matched to a linear speed of the rolling stock when the roll gap is closed.  
   
   
       30 . A method for rolling a rolling stock material having at least one transitional region in a mill train, comprising: 
 providing a plurality of roll stands each having a roll gap;    opening the roll gap of one of the roll stands based on a physical characteristic of the transitional region, a position of the transitional region relative to the mill train and a linear speed of the rolling stock through the mill train, wherein a tension of the rolling stock in front of and behind one of the roll stand is equalized before opening the roll gap;    matching a rolling speed of a roll of at least one of the roll stands to the linear speed of the rolling stock through the mill train; and    closing the roll gap once the transitional region has traversed the roll stand.    
   
   
       31 . The method as claimed in  claim 30 , wherein a reduction in a roll gap is regulated with regard to the position of the transitional region relative to the mill train.  
   
   
       32 . The method as claimed in  claim 31 , wherein the tension of the rolling stock in front of the roll stand is regulated based on a rotating speed of drives of the remaining roll stands if the reduction in the roll stand has been reduced around a critical transitional region.