Multi-high roll stand

Abstract

A multi-high roll stand has several driven support rolls and several working rolls frictionally driven by the support rolls. The support rolls form a roll gap defining a thickness of rolling stock guided between the working rolls in a rolling direction. The working rolls are moveable in a direction substantially parallel to the rolling direction for adjusting the gap width of the rolling gap.

What is claimed is:  
     
         1 . A multi-high roll stand having several driven support rolls and having several working rolls frictionally driven by the support rolls, wherein the support rolls form a roll gap defining a thickness of rolling stock guided between the working rolls in a rolling direction, wherein the working rolls are configured to be moveable in a direction substantially parallel to the rolling direction for adjusting a gap width of the rolling gap.  
     
     
         2 . The multi-high roll stand according to  claim 1 , wherein the working rolls are substantially horizontally movable for adjusting the gap width of the rolling gap.  
     
     
         3 . The multi-high roll stand according to  claim 1 , wherein the working rolls have an adjusting device, respectively, wherein the adjusting devices of the working rolls are configured to adjust a position of the working rolls in the rolling direction, wherein the multi-high roll stand further comprises a common control device connected to the adjusting devices, wherein the common control device provides a set value for each one of the adjusting devices as a function of a measured value of a thickness of the rolling stock and as a function of the preset value for the thickness of the rolling stock.  
     
     
         4 . The multi-high roll stand according to  claim 3 , wherein the adjusting devices acting on the working rolls are hydraulic adjusting devices.  
     
     
         5 . The multi-high roll stand according to  claim 3 , further comprising a measurement transducer connected to an input of the common control device.  
     
     
         6 . The multi-high roll stand according to  claim 3 , wherein the common control device has a memory component configured to store several nominal preset values for the thickness of the rolling stock.  
     
     
         7 . A method for operating a multi-high roll stand according to  claim 1 , comprising the step of adjusting a thickness of the rolling stock by moving the working rolls in a direction substantially parallel to the rolling direction.  
     
     
         8 . The method according to  claim 7 , further comprising the steps of comparing an actual measured value of the thickness of the rolling stock with a nominal value of the thickness of the rolling stock and using a result of the step of comparing in the step of adjusting.