Dressing tool

Abstract

A dressing tool ( 100, 200, 300, 400, 500 ) for conditioning of grinding bodies, especially ceramically bonded grinding bodies, the dressing tool ( 100, 200, 300, 400, 500 ) comprising a base body which bears a self-supporting function coating ( 120, 220, 320, 420, 520 ) which defines the working region of the dressing tool, the function coating ( 120, 220, 320, 420, 520 ) comprising a porous bonding matrix ( 121, 221, 321, 421, 521 ) which is uniformly penetrated with grains of hard material ( 122, 222, 322, 422, 522 ), is characterized in that in the porous bonding matrix ( 121, 221, 321, 421, 521 ) there are additionally embedded reinforcing elements ( 130, 230, 330, 430, 530 ) of a hard material for stabilizing the function coating ( 120, 220, 320, 420, 520 ).

1 . Dressing tool for conditioning of grinding bodies, especially ceramically bonded grinding bodies, the dressing tool comprising a base body which bears a self-supporting function coating which defines the working region of the dressing tool, the function coating comprising a porous bonding matrix which is uniformly penetrated with grains of hard material, characterized in that in the porous bonding matrix there are additionally embedded reinforcing elements of a hard material for stabilizing the function coating. 
     
     
         2 . Dressing tool as claimed in  claim 1 , wherein the porous bonding matrix has a pore volume of 10-80%, preferably 30-50%, more preferably 35-45%. 
     
     
         3 . Dressing tool as claimed in  claim 1 , wherein the porous bonding matrix comprises an inorganic oxide material, preferably the inorganic oxide material containing Al 2 O 3 , ZrO 2 , SiO 2 , Fe 2 O 3  and/or ZnO. 
     
     
         4 . Dressing tool as claimed in  claim 1 , wherein the porous bonding matrix comprises an inorganic nonoxide material, especially a carbide and/or a nitride, and especially preferably the inorganic nonoxide material containing SiC, B 4 C, Si 3 N 4 , TiC, Fe 3 C, TiN and/or WC. 
     
     
         5 . Dressing tool as claimed in  claim 4 , wherein the porous bonding matrix consists of a combination of inorganic oxide material and inorganic nonoxide material. 
     
     
         6 . Dressing tool as claimed in  claim 1 , wherein the porous bonding matrix contains a metallic phase and/or an intermetallic phase, preferably the metallic phase and/or the intermetallic phase containing Cu, Sn, Zn, Fe, Co, Ni, Ag, Cr, V, Zr, Mn and/or Al. 
     
     
         7 . Dressing tool as claimed in  claim 6 , wherein the metallic phase and/or intermetallic phase in the porous bonding matrix has a volumetric proportion of 5-60%. 
     
     
         8 . Dressing tool as claimed in  claim 1 , wherein the porous bonding matrix has an open pore structure. 
     
     
         9 . Dressing tool as claimed in  claim 1 , wherein the function coating is produced by a sintering process. 
     
     
         10 . Dressing tool as claimed in  claim 1 , wherein the grain size of the hard material grains is 20-600 μm, preferably 80-100 μm. 
     
     
         11 . Dressing tool as claimed in  claim 1 , wherein the hard material grains are present in the form of diamond grains, preferably the volumetric proportion of the diamond grains being 30-40%. 
     
     
         12 . Dressing tool as claimed in  claim 1 , wherein the function coating is built up in several layers. 
     
     
         13 . Dressing tool as claimed in  claim 1 , wherein the minimum thickness of the function coating corresponds at least five times, especially preferably at least ten times, to an average grain diameter of the hard material grains. 
     
     
         14 . Dressing tool as claimed in  claim 1 , wherein the reinforcing elements are present as elongated or cuboidal rods, preferably the ratio of the length of the cuboidal rod to thickness and/or width of the cuboidal rod having a value of 2-7. 
     
     
         15 . Dressing tool as claimed in  claim 1 , wherein the reinforcing elements consist solely of diamond, except for inevitable impurities. 
     
     
         16 . Dressing tool as claimed in  claim 1 , wherein the reinforcing elements consist of a composite material, especially the composite material containing diamond and a metallic phase. 
     
     
         17 . Dressing tool as claimed in  claim 16 , wherein the diamond in the composite material has a proportion by weight of 80-90% and the metallic phase has a proportion by weight of 10-20%. 
     
     
         18 . Dressing tool as claimed in  claim 1 , wherein the reinforcing elements are located bordering one edge and/or one side surface of the function. 
     
     
         19 . Dressing tool as claimed in  claim 1 , wherein the base body is made rotationally symmetrical with respect to the axis of rotation and is present especially as a disk and/or ring, especially preferably the base body consisting of metal. 
     
     
         20 . Dressing tool as claimed in  claim 19 , wherein the reinforcing elements with their longitudinal middle axes are located in the radial direction of the base body. 
     
     
         21 . Dressing tool as claimed in  claim 1 , wherein the reinforcing elements are additionally anchored in the base body. 
     
     
         22 . Use of a dressing tool as claimed in  claim 1 , for conditioning of grinding bodies, preferably ceramically bonded grinding bodies and especially preferably grinding bodies of cubic boron nitride.