Rotary abrasive material

Abstract

A first member has a base plate 11 and an abrasive sheet installation portion 12 where an abrasive sheet is fixed. The base plate or the abrasive sheet installation portion is provided with an air-introducing portion 15 as a space penetrating from the back face side to the front face side of the base plate or the abrasive sheet installation portion, and an airflow passes from the back face side to the front face side as a rotary abrasive material rotates. When the first member is used as a single unit, overheating is prevented and swarf can be removed when the rotation of a projection portion as the abrasive sheet installation portion 12 generates an airflow flowing through the air-introducing portion 15. Further, when a second member is provided such that its axial position is adjustable relative to the first member, an abrasive sheet of the second member can project and retract against the first member, so that, depending on processing required, grinding work can be performed by easily switching abrasive sheets to be used.

1 . A rotary abrasive material, which is a disk-like object with an abrasive sheet ( 14 ) arranged on its front face and can grind an object to be ground by being attached to a rotating tool (G), wherein 
 the rotary abrasive material ( 10 ) has a base plate ( 11 ) and an abrasive sheet installation portion ( 12 );    the base plate ( 11 ) being like a disk in a plan view and attachable to a rotating shaft (S) of the rotating tool (G) in the center thereof;    the abrasive sheet installation portion ( 12 ) being provided extending in a radial outward direction of the base plate ( 11 ) and attached with the abrasive sheet ( 14 ) to the front face side thereof, and    in the base plate ( 11 ) or the abrasive sheet installation portion ( 12 ) is provided an air-introducing portion ( 15 ) which is a space penetrating from the back face side to the front face side and through which an airflow passes from the back face side to the front face side as the rotary abrasive material ( 10 ) rotates.    
   
   
       2 . The rotary abrasive material as set forth in  claim 1 , wherein 
 the abrasive sheet installation portion ( 12 ) is a projection portion ( 12 ) provided in plurality so as to project in the radial outward direction of the base plate ( 11 ), wherein    the air-introducing portion ( 15 ) is a space existing between the projection portions ( 12 ), and    the abrasive sheet ( 14 ) is attached to the projection portion ( 12 ).    
   
   
       3 . The rotary abrasive material as set forth in  claim 2 , wherein 
 an outer circumferential connecting portion ( 16 ) is formed so as to connect an outer circumferential portion ( 12 c) of the respective projection portion ( 12 ) to each other, whereby the air-introducing portion ( 15 ) is surrounded by the base plate ( 11 ), projection portion ( 12 ), and outer circumferential connecting portion ( 16 ).    
   
   
       4 . A rotary abrasive material, which is a disk-like object with an abrasive sheet ( 14 ) arranged on its front face and can grind an object to be ground by being attached to a rotating tool (G), wherein 
 the rotary abrasive material ( 10 ) has a base plate ( 11 ) that is like a disk in a plan view and attachable to a rotating shaft (S) of the rotating tool (G) in the center thereof;    at least part of the front face side of the base plate ( 11 ) being attached with the abrasive sheet ( 14 ), and    in this base plate ( 11 ) is provided an air-introducing portion ( 15 ) which is a space penetrating from the back face side to the front face side and through which an airflow passes from the back face side to the front-surface side as the rotary abrasive material ( 10 ) rotates.    
   
   
       5 . A rotary abrasive material, which is a disk-like object with abrasive sheets ( 14 ,  23 ) arranged on its front face and can grind an object to be ground by being attached to a rotating tool (G), wherein 
 the rotary abrasive material ( 10 ) comprises a first member ( 1 ), a second member ( 2 ), and an attachment position adjusting means ( 25 ), wherein    the first member ( 1 ) has a base plate ( 11 ) and a projection portion ( 12 );    the base plate ( 11 ) being like a disk in a plan view and attachable to a rotating shaft (S) of the rotating tool (G) in the center thereof;    the projection portion ( 12 ) being provided in plurality so as to project in the radial outward direction of the base plate ( 11 ) and having an abrasive sheet inserting space ( 15 ) between the projection portions ( 12 );    the abrasive sheet ( 14 ) being attached to a one-side face of the projection portion ( 12 ), and    the second member ( 2 ) has a base plate ( 21 );    the base plate ( 21 ) being like a disk in a plan view and attachable to a rotating shaft (S) of the rotating tool (G) in the center thereof;    the abrasive material ( 23 ) being disposed on a one-side face of the base plate ( 21 ) and at a position, in a plan view, corresponding to the abrasive sheet inserting space ( 15 ) of the first member ( 1 ), and    the attachment position adjusting means ( 25 ) is a means for adjusting a relation of position in the axial direction in combining the first member ( 1 ) and second member ( 2 ), whereby    the abrasive material ( 14 ) of the first member ( 1 ) and the abrasive material ( 23 ) of the second member ( 2 ) are alternatively disposed by combining the first member ( 1 ) and second member ( 2 ) so as to make the centers of the respective base plates ( 11 ,  21 ) meet, wherein    the abrasive sheet ( 23 ) of the second member ( 2 ) can project and retract against the first member ( 1 ).    
   
   
       6 . The rotary abrasive material as set forth in  claim 2 , wherein 
 the abrasive sheet ( 14 ,  23 ) is disposed inclined against a rotating direction of the rotary abrasive material ( 10 ).    
   
   
       7 . The rotary abrasive material as set forth in  claim 3 , wherein 
 the abrasive sheet ( 14 ,  23 ) is disposed inclined against a rotating direction of the rotary abrasive material ( 10 ).    
   
   
       8 . The rotary abrasive material as set forth in  claim 5 , wherein 
 the abrasive sheet ( 14 ,  23 ) is disposed inclined against a rotating direction of the rotary abrasive material ( 10 ).