Abnormal-vibration-predicting method for roll grinder, rolling-roll-grinding method, metal-strip-rolling method, abnormal-vibration-predicting device for roll grinder, and roll-grinding apparatus

Abstract

An abnormal-vibration-predicting method for a roll grinder that grinds an outer peripheral surface of a rolling roll with a grinding wheel while the rolling roll rotates includes an acquisition step and a prediction step. The acquisition step acquires a rigidity parameter related to a rigidity of the roll grinder and a wheel rotation parameter related to a rotational speed of the grinding wheel. The prediction step predicts an occurrence of an abnormal vibration in a process of grinding the rolling roll by using the rigidity parameter and the wheel rotation parameter.

1 . An abnormal-vibration-predicting method for a roll grinder that grinds an outer peripheral surface of a rolling roll with a grinding wheel while the rolling roll rotates, the abnormal-vibration-predicting method comprising:
 an acquisition step of acquiring a rigidity parameter related to a rigidity of the roll grinder and a wheel rotation parameter related to a rotational speed of the grinding wheel; and   a prediction step of predicting an occurrence of an abnormal vibration in a process of grinding the rolling roll by using the rigidity parameter and the wheel rotation parameter.   
     
     
         2 . The abnormal-vibration-predicting method according to  claim 1 , wherein the rigidity parameter includes a distance between a rotation center of the rolling roll and a rotation center of the grinding wheel or a sum of a diameter of the rolling roll and a diameter of the grinding wheel. 
     
     
         3 . The abnormal-vibration-predicting method according to  claim 1 , wherein, in the acquisition step, a load parameter related to a load applied to the grinding wheel is further acquired, and
 wherein, in the prediction step, the occurrence of the abnormal vibration in the process of grinding the rolling roll is predicted by using the rigidity parameter, the wheel rotation parameter, and the load parameter.   
     
     
         4 . The abnormal-vibration-predicting method according to  claim 3 , wherein the load parameter includes a load current value of an electric motor that rotates the grinding wheel. 
     
     
         5 . An abnormal-vibration-predicting method for a roll grinder that grinds an outer peripheral surface of a rolling roll with a grinding wheel while the rolling roll rotates, the abnormal-vibration-predicting method comprising:
 an acquisition step of acquiring input data including a rigidity parameter related to a rigidity of the roll grinder and a wheel rotation parameter related to a rotational speed of the grinding wheel; and   a prediction step of predicting an occurrence of an abnormal vibration in a process of grinding the rolling roll by using an abnormal-vibration-prediction model whose input is the input data and whose output is abnormal vibration information for the process of grinding the rolling roll.   
     
     
         6 . The abnormal-vibration-predicting method according to  claim 5 , wherein the rigidity parameter includes a distance between a rotation center of the rolling roll and a rotation center of the grinding wheel or a sum of a diameter of the rolling roll and a diameter of the grinding wheel. 
     
     
         7 . The abnormal-vibration-predicting method according to  claim 5 , wherein the input data acquired in the acquisition step includes the rigidity parameter, the wheel rotation parameter, and a load parameter related to a load applied to the grinding wheel. 
     
     
         8 . The abnormal-vibration-predicting method according to  claim 7 , wherein the load parameter includes a load current value of an electric motor that rotates the grinding wheel. 
     
     
         9 . A rolling-roll-grinding method using the abnormal-vibration-predicting method according to  claim 1 ,
 wherein, when the abnormal vibration is predicted to occur in the prediction step, grinding conditions of the roll grinder are changed to grinding conditions for which the abnormal vibration is not predicted to occur.   
     
     
         10 . A metal-strip-rolling method comprising:
 rolling a metal strip in a rolling mill in which a rolling roll is installed, the rolling roll being ground by the rolling-roll-grinding method according to claim  9 .   
     
     
         11 . An abnormal-vibration-predicting device for a roll grinder that grinds an outer peripheral surface of a rolling roll with a grinding wheel while the rolling roll rotates, the abnormal-vibration-predicting device comprising:
 a processor programmed to:
 acquire input data including a rigidity parameter related to a rigidity of the roll grinder and a wheel rotation parameter related to a rotational speed of the grinding wheel; and 
 predict an occurrence of an abnormal vibration of the roll grinder by using an abnormal-vibration-prediction model whose input is the input data and whose output is abnormal vibration information. 
   
     
     
         12 . The abnormal-vibration-predicting device according to  claim 11 , wherein the input data acquired by includes the rigidity parameter, the wheel rotation parameter, and a load parameter related to a load applied to the grinding wheel. 
     
     
         13 . The abnormal-vibration-predicting device according to  claim 11 , wherein the processor is further programmed to determine the input data for which the abnormal vibration does not occur by using the abnormal-vibration-prediction model. 
     
     
         14 . A roll-grinding apparatus comprising:
 a roll grinder that grinds an outer peripheral surface of a rolling roll with a grinding wheel while the rolling roll rotates; and   the abnormal-vibration-predicting device according to  claim 11 .   
     
     
         15 . A roll-grinding apparatus comprising:
 a roll grinder that grinds an outer peripheral surface of a rolling roll with a grinding wheel while the rolling roll rotates; and   the abnormal-vibration-predicting device according to claim  13 .   
     
     
         16 . A rolling-roll-grinding method using the abnormal-vibration-predicting method according to  claim 3 ,
 wherein, when the abnormal vibration is predicted to occur in the prediction step, grinding conditions of the roll grinder are changed to grinding conditions for which the abnormal vibration is not predicted to occur.   
     
     
         17 . A rolling-roll-grinding method using the abnormal-vibration-predicting method according to  claim 5 ,
 wherein, when the abnormal vibration is predicted to occur in the prediction step, grinding conditions of the roll grinder are changed to grinding conditions for which the abnormal vibration is not predicted to occur.   
     
     
         18 . A metal-strip-rolling method comprising:
 rolling a metal strip in a rolling mill in which a rolling roll is installed, the rolling roll being ground by the rolling-roll-grinding method according to  claim 16 .   
     
     
         19 . A metal-strip-rolling method comprising:
 rolling a metal strip in a rolling mill in which a rolling roll is installed, the rolling roll being ground by the rolling-roll-grinding method according to claim  17 .   
     
     
         20 . A roll-grinding apparatus comprising:
 a roll grinder that grinds an outer peripheral surface of a rolling roll with a grinding wheel while the rolling roll rotates; and   the abnormal-vibration-predicting device according to  claim 12 .