On-line roll grinding apparatus, on-line roll grinding method rolling mill equipment and rolling method

Abstract

An on-line roll grinding apparatus which includes a grinding unit having a rotatable rotary grindstone for on-line grinding a rolling roll and a roughness adjusting unit capable of adjusting A surface roughness of the rolling roll, and which can adjust the surface roughness of the rolling roll in AN on-line roll grinding.

What is claimed is:  
     
         1 . An on-line roll grinding apparatus, comprising: 
 grinding means including a rotatable rotary grindstone for on-line grinding a rolling roll; and    roughness adjusting means capable of adjusting a surface roughness of said rolling roll.    
     
     
         2 . An on-line roll grinding apparatus, comprising: 
 first grinding means including a rotatable rotary grindstone for on-line grinding a rolling roll; and    second grinding means capable of setting up a grinding mark approximately in a circumferential direction of said rolling roll.    
     
     
         3 . An on-line roll grinding apparatus which comprises a grindstone device including: a rotary grindstone attached facing to a rolling roll; a grindstone driving device for rotationally driving said rotary grindstone; and a pressing device for pressing said rotary grindstone to said rolling roll, and to which a laterally moving device is provided for moving said grindstone device in the rolling roll shaft direction, wherein a grindstone including a non-rotary type grinding grain layer is provided to said grindstone device.  
     
     
         4 . The on-line roll grinding apparatus according to  claim 3 , wherein a non-rotary type grinding grain layer pressing device which can advance and retreat is arranged to said rolling roll, and a cantilever plate is provided at a tip of said non-rotary type grinding grain layer pressing device, and an elastic body function is given to said cantilever plate, and to one side of the surface thereof, a grinding grain layer is mounted.  
     
     
         5 . The on-line roll grinding apparatus according to  claim 3 , wherein said non-rotary type grinding grain layer includes ultra grinding grains made of diamond or cubic system boron nitride.  
     
     
         6 . The on-line roll grinding apparatus according to  claim 3 , wherein there is provided control means for controlling the pressing force of a pressing device which can advance and retreat the non-rotary type grinding grain layer to and from said rolling roll.  
     
     
         7 . The on-line roll grinding apparatus according to  claim 3 , wherein said non-rotary type grinding grain layer is arranged on one side of said rotary grindstone in the roll shaft direction, and when said rotary grindstone moves while performing grinding, only in the case of moving to the opposite side of the place where the non-rotary type grinding grain layer is arranged in the roll shaft direction, said non-rotary type grinding grain layer is pressed onto the rolling roll surface.  
     
     
         8 . The on-line roll grinding apparatus according to  claim 3 , wherein the non-rotary type grinding grain layer is controlled so that only the part of the rolling roll surface through which the rolled material passes is pressed onto the rolling roll surface.  
     
     
         9 . An on-line roll grinding method, comprising the steps of: 
 on-line grinding a rolling roll by grinding means including a rotatable rotary grindstone for online grinding said rolling roll; and    adjusting the surface roughness of said rolling roll, after that, by setting up a grinding mark approximately in the circumferential direction of said rolling roll.    
     
     
         10 . An on-line roll grinding method by using an on-line roll grinding apparatus which comprises a grindstone device including: a rotary grindstone attached facing to a rolling roll; a grindstone driving device for rotationally driving said rotary grindstone; and a pressing device for pressing said rotary grindstone to said rolling roll, and to which a laterally moving device for moving said grindstone device in the rolling roll shaft direction is provided, 
 wherein a grindstone including a non-rotary type grinding grain layer is provided to said grindstone device, and in grinding for eliminating a worn difference in level of said rolling roll, the grinding is performed by using said rotary grindstone, and in order to adjust the degree of roughness of the rolling roll surface to a desired degree of roughness, the non-rotary type grinding grain layer is pressed onto said rolling roll to perform grinding.    
     
     
         11 . A rolling mill equipment, comprising: 
 grinding means including a rotatable rotary grindstone for on-line grinding a rolling roll; and    roughness adjusting means capable of adjusting the surface roughness of said rolling roll.    
     
     
         12 . A rolling method, comprising the steps of: 
 on-line grinding a rolling roll by grinding means including a rotatable rotary grindstone for online grinding said rolling roll; and    performing rolling, after that, while adjusting the surface roughness of said rolling roll by setting up a grinding mark approximately in the circumferential direction of said rolling roll.