Abrasive wheel, abrasive member replacement device, and abrasive member replacement method

Abstract

An abrasive wheel includes a wheel body configured to rotate about a rotary shaft, a holder fixed to the wheel body and comprising a plurality of electromagnets, and a plurality of abrasive members configured to grind a substrate, the plurality of abrasive members being detachably fixed respectively to the plurality of electromagnets, where each of the plurality of abrasive members is further configured to be independently replaceable.

What is claimed is: 
     
         1 . An abrasive wheel comprising:
 a wheel body configured to rotate about a rotary shaft;   a holder fixed to the wheel body and comprising a plurality of electromagnets; and   a plurality of abrasive members configured to grind a substrate, the plurality of abrasive members being detachably fixed respectively to the plurality of electromagnets,   wherein each of the plurality of abrasive members is further configured to be independently replaceable.   
     
     
         2 . The abrasive wheel of  claim 1 , wherein each of the plurality of abrasive members comprises:
 a coupling portion attached to an electromagnet of the plurality of electromagnets; and   an abrasive portion on one side of the coupling portion and configured to grind the substrate.   
     
     
         3 . The abrasive wheel of  claim 2 , wherein each of the plurality of abrasive members further comprises a separator between the coupling portion and the abrasive portion. 
     
     
         4 . The abrasive wheel of  claim 1 , wherein the holder comprises a plurality of seating portions, each of the plurality of seating portions comprising a groove configured to receive a portion of a respective abrasive member of the plurality of abrasive members; and
 wherein the plurality of electromagnets are on respective inner surfaces of the plurality of seating portions.   
     
     
         5 . An abrasive member replacement device comprising:
 an abrasive wheel comprising:
 a wheel body configured to rotate about a rotary shaft, 
 a holder on the wheel body and comprising an electromagnet, and 
 an abrasive member attached to the electromagnet and configured to grind a substrate; and 
   a replacement assembly comprising a conveyor belt adjacent to at least a portion of the holder and configured to provide abrasive members in one direction.   
     
     
         6 . The abrasive member replacement device of  claim 5 , further comprising a support portion on an upper surface of the conveyor belt and configured to support an abrasive member. 
     
     
         7 . The abrasive member replacement device of  claim 5 , further comprising:
 a supply assembly connected to a first side of the replacement assembly and configured to supply the conveyor belt to the replacement assembly; and   a collection assembly connected to a second side of the replacement assembly and configured to collect the conveyor belt from the replacement assembly.   
     
     
         8 . The abrasive member replacement device of  claim 7 , wherein the supply assembly is further configured to supply a replacement abrasive member on an upper surface of the conveyor belt to the replacement assembly. 
     
     
         9 . The abrasive member replacement device of  claim 7 , wherein the collection assembly is further configured to collect a worn abrasive member separated from the electromagnet and arranged on an upper surface of the conveyor belt. 
     
     
         10 . The abrasive member replacement device of  claim 7 , wherein the supply assembly comprises a supply shaft parallel to the rotary shaft of the abrasive wheel,
 wherein the conveyor belt is wound around the supply shaft, and wherein the conveyor belt on which a replacement abrasive member is arranged is provided to the replacement assembly as the supply shaft rotates.   
     
     
         11 . The abrasive member replacement device of  claim 10 , wherein the collection assembly comprises a collection shaft parallel to the supply shaft,
 wherein the conveyor belt is wound around the collection shaft, and   wherein the conveyor belt is collected from the replacement assembly as the collection shaft rotates.   
     
     
         12 . The abrasive member replacement device of  claim 11 , wherein the supply shaft and the collection shaft are arranged in the same direction with respect to the rotary shaft of the abrasive wheel. 
     
     
         13 . The abrasive member replacement device of  claim 11 , wherein the supply shaft and the collection shaft are arranged in opposite directions with respect to the rotary shaft of the abrasive wheel. 
     
     
         14 . The abrasive member replacement device of  claim 5 , further comprising a controller configured to control on and off states of the electromagnet. 
     
     
         15 . The abrasive member replacement device of  claim 5 , further comprising a wear detector configured to detect a degree of wear of the abrasive member attached to the electromagnet. 
     
     
         16 . The abrasive member replacement device of  claim 15 , wherein the wear detector is arranged in proximity to the conveyor belt of the replacement assembly and below the holder. 
     
     
         17 . An abrasive member replacement method comprising:
 rotating an abrasive wheel about a rotary shaft, the abrasive wheel comprising a holder and an abrasive member attached to an electromagnet of the holder;   separating a worn abrasive member from the electromagnet by setting, by a controller, the electromagnet to an off state;   supplying, by a conveyor belt of supply assembly, a replacement abrasive member to a replacement assembly;   attaching the replacement abrasive member that is on the conveyor belt to the electromagnet by setting, by the controller, the electromagnet to an on state; and   collecting, by a collection assembly, the worn abrasive member from the conveyor belt of the replacement assembly.   
     
     
         18 . The abrasive member replacement method of  claim 17 , further comprising detecting, by a wear detector, a degree of wear of the abrasive member attached to the electromagnet. 
     
     
         19 . The abrasive member replacement method of  claim 18 , wherein the worn abrasive member is separated from the electromagnet based on the degree of wear detected by the wear detector. 
     
     
         20 . The abrasive member replacement method of  claim 19 , wherein the separating the worn abrasive member from the electromagnet further comprises, based on the worn abrasive member being located above the conveyor belt of the replacement assembly, arranging the worn abrasive member on an upper surface of the conveyor belt of the replacement assembly by setting, by the controller, the electromagnet to the off state.