Abrasive material and abrasive wheel

Abstract

The invention relates to an abrasive having a base body and abrasive particles applied to the surface of the base body, characterized in that the base body has a multicellular structure. The invention further relates to a process for producing this abrasive and to a grinding tool based on this abrasive.

1 . Abrasive having a base body and abrasive particles applied to the surface of the base body, characterized in that the base body has a multicellular structure. 
     
     
         2 . Abrasive according to  claim 1 , characterized in that the base body is a foamed glass body. 
     
     
         3 . Abrasive according to  claim 1 , characterized in that the base body is essentially spherical. 
     
     
         4 . Abrasive according to  claim 1 , characterized in that the average size of the abrasive bodies is 0.1-2 mm, preferably 0.2-1 mm, more preferably 0.3-0.5 mm. 
     
     
         5 . Abrasive according to  claim 1 , characterized in that the pore size of the base body is in the range from 1 to 200 μm. 
     
     
         6 . Abrasive according to  claim 1 , characterized in that the density of the base body is in the range from 0.3 to 1 g/cm3. 
     
     
         7 . Abrasive according to  claim 1 , characterized in that the compressive strength of a base body is 0.2-6 N. 
     
     
         8 . Abrasive according to  claim 1 , characterized in that the compressive strength of a bed of the base bodies is 1-4 N/mm2, preferably 1.5-3 N/mm2. 
     
     
         9 . Abrasive according to  claim 1 , characterized in that the abrasive particles consist of a particle size fraction in the range from P150 to P1000, preferably from P180 to P500. 
     
     
         10 . Abrasive according to  claim 1 , characterized in that the abrasive particles comprise α-alumina or silicon carbide. 
     
     
         11 . Process for producing an abrasive according to  claim 1 , characterized by the following steps:
 d) provision of the multicellular base bodies,   e) coating of the base body with binder,   f) coating of the base body with abrasive particles.   
     
     
         12 . Process according to  claim 11 , characterized in that the abrasive is heat-treated, preferably at temperatures of 400-1000° C., preferably 800-1000° C. 
     
     
         13 . Grinding tool having a substrate, a binder for abrasive and an abrasive, wherein the substrate preferably comprises a woven fabric, a knitted fabric or paper, film or nonwoven, characterized in that it comprises abrasive according to  claim 1 . 
     
     
         14 . Bonded grinding tool, characterized in that it comprises binder and abrasive according to  claim 1 . 
     
     
         15 . Grinding tool according to  claim 13 , characterized in that it additionally has a covering binder.