Honing tool

Abstract

A honing tool, in particular an internally or externally toothed honing ring for the finish machining of gears, containing a synthetic-resin bonding-agent matrix ( 1 ) and ceramically bonded abrasive-grain hollow bodies ( 2 ) embedded therein.

1 . A honing tool which contains hollow bodies ( 2 ) which are embedded in a matrix ( 1 ) of softer bonding agent and consist of abrasive grain bonded by a harder bond.  
     
     
         2 . The honing tool as claimed in  claim 1 , characterized in that it is a toothed honing ring for the finish machining of gears.  
     
     
         3 . The honing tool as claimed in  claim 1  or  2 , characterized in that the ratio of the moduli of elasticity of the harder bonding agent and of the softer bonding agent is at least 2:1.  
     
     
         4 . The honing tool as claimed in one of  claims 1  to  3 , characterized in that the harder bonding agent is of a ceramic type and the softer bonding agent is of an organic type.  
     
     
         5 . The honing tool as claimed in one of  claims 1  to  4 , characterized in that the hollow bodies ( 2 ) are spherical.  
     
     
         6 . The honing tool as claimed in one of  claims 1  to  5 , characterized in that the bond of the hollow bodies consists of a supporting shell ( 5 ) and a bonding agent bonding the abrasive grain ( 4 ) at its outer surface, and at least the shell ( 5 ) or the bonding agent is harder than the bonding agent of the matrix ( 1 ).  
     
     
         7 . The honing tool as claimed in one of  claims 1  to  6 , characterized in that the thickness of the grain layer ( 7 ) of the hollow bodies is on average not greater than five times the average grain size.  
     
     
         8 . The honing tool as claimed in one of  claims 1  to  7 , characterized in that the grain layer ( 7 ) has essentially only the thickness of an abrasive grain ( 4 ).  
     
     
         9 . The honing tool as claimed in one of  claims 1  to  8 , characterized in that the average outside diameter of the hollow bodies ( 2 ) is equal to five to twenty-five times the average abrasive grain size.  
     
     
         10 . The honing tool as claimed in one of  claims 1  to  9 , characterized in that the average outside diameter of the hollow bodies ( 2 ) is equal to one third to one twentieth of the tooth height.  
     
     
         11 . The honing tool as claimed in one of  claims 1  to  10 , characterized in that the volumetric proportion of the hollow bodies ( 2 ) is between 20 and 70% of the total volume of the honing tool.  
     
     
         12 . The honing tool as claimed in one of  claims 1  to  11 , characterized in that the bonding agent matrix ( 1 ) contains additional abrasive grain ( 6 ).  
     
     
         13 . The honing tool as claimed in  claim 12 , characterized in that the abrasive grain type and/or size of the grain ( 4 ) bonded in the hollow bodies ( 2 ) and of the grain ( 6 ) additionally bonded in the matrix ( 1 ) are roughly the same.  
     
     
         14 . The honing tool as claimed in one of  claims 1  to  12 , characterized in that the pore space present is restricted essentially to the cavities of the hollow bodies ( 2 ).  
     
     
         15 . A method of honing the flanks of a gear by generating roll motion of a correspondingly toothed honing ring, characterized by the use of a honing ring as claimed in one of  claims 2  to  14 .  
     
     
         16 . The method as claimed in  claim 15 , characterized in that the relative velocity between the tooth flanks of the gear to be machined and of the honing ring in the region of their mutual contact is not greater than 5 m/sec.