Roll Grinding Method for Matched Pair of Rolls

Abstract

A method of grinding a pair of matching rolls in which the position of a grinding wheel relative to the rolls is computer controlled, and the surface profile of a roll is continuously measured and input to the computer comprising modifying the desired profile of the second roll of the matched pair adjusted by the residual shape error profile of the first roll to establish a uniform gap between the pair of rolls; and grinding the second roll to bring the profile of the second roll within acceptable tolerance based on the modified desirable profile.

The invention claimed is: 
     
         1 . A method of grinding a pair of matching rolls used in a strip rolling mill in which the position of a grinding wheel relative to the rolls is computer controlled, and the surface profile of a roll is continuously measured and input to the computer comprising the step of:
 inputting to the computer the desired profile and acceptable tolerance of a first roll of the matched pair;   measuring and inputting to the computer the actual profile of the first roll;   grinding the first roll to bring the profile of first roll within the acceptable tolerance;   inputting to the computer the residual shape error profile of the first roll;   inputting to the computer the desired profile and acceptable tolerance of a second roll;   modifying the desired profile of the second roll of the matched pair adjusting by the residual shape error profile of the first roll to establish a uniform gap between the pair of rolls; and   grinding the second roll to bring the profile of the second roll within acceptable tolerance based on the modified desirable profile.   
     
     
         2 . The method of  claim 1 , in which the computer calculates the difference between the measured roll profile and the desired roll profile and adjusts the grinding conditions to reduce the difference. 
     
     
         3 . The method of  claim 1 , in which the profile tolerance of the first roll is relaxed so as to reduce grinding time while still improving the accuracy of the nip. 
     
     
         4 . The method of  claim 1 , in which the profile tolerance of the first and second rolls are relaxed to further reduce grinding time and achieve a nip accuracy comparable to one obtained without this method.