Grinding Ring with Dual Function Grinding Segments

Abstract

An abrasive article is disclosed and can include a base. At least one dual function grinding segment can be mounted on the base. The dual function grinding segment can include a working surface having an average slope, S WS , relative to a rotation plane and a finishing surface having an average slope relative to the plane rotation, S FS , and wherein S WS is greater than S FS .

1 . An abrasive article, comprising:
 a base having an annular shape defining a central opening;   at least one dual function grinding segment mounted on the base, wherein the dual function grinding segment includes a working surface having an average slope, S WS , relative to a rotation plane and a finishing surface having an average slope relative to the plane rotation, S FS , and wherein S WS  is greater than S FS .   
     
     
         2 . The abrasive article of  claim 1 , wherein S WS  is at least greater than about 2×S FS . 
     
     
         3 . (canceled) 
     
     
         4 . The abrasive article of  claim 2 , wherein S WS  is less than about 25×S FS . 
     
     
         5 . The abrasive article of  claim 1 , wherein the working surface is formed at an angle with the finishing surface at an angle of at least about 185°. 
     
     
         6 . (canceled) 
     
     
         7 . The abrasive article of  claim 6 , wherein the angle is not greater than about 210°. 
     
     
         8 . The abrasive article of  claim 1 , wherein the dual function grinding segment further comprises a working surface area and a finishing surface area and the finishing surface area is less than the working surface area. 
     
     
         9 . The abrasive article of  claim 8 , wherein the finishing surface area is less than about 60% of the working surface area. 
     
     
         10 - 11 . (canceled) 
     
     
         12 . The abrasive article of  claim 1 , wherein the dual function grinding segment comprises a working volume and a finishing volume and the finishing volume is less than the working volume. 
     
     
         13 . The abrasive article of  claim 12 , wherein the finishing volume is less than about 60% of the working volume. 
     
     
         14 - 35 . (canceled) 
     
     
         36 . The abrasive article of  claim 1 , further comprising a plurality of dual function grinding segments mounted on the base and a plurality of single function grinding segments mounted on the base. 
     
     
         37 . The abrasive article of  claim 36 , further comprising a total number of grinding segments equal to a sum of the dual function grinding segments and the single function grinding segments, wherein at least about 20% of the total includes the dual function grinding segments. 
     
     
         38 - 40 . (canceled) 
     
     
         41 . The abrasive article of  claim 36 , wherein a dual function grinding segment is mounted on the base between each pair of adjacent single function grinding segments. 
     
     
         42 . The abrasive article of  claim 36 , wherein a plurality of dual function grinding segments are mounted on the base between each pair of adjacent single function grinding segments. 
     
     
         43 - 44 . (canceled) 
     
     
         45 . The abrasive article of  claim 1 , further comprising:
 a rotation axis around which the abrasive article rotates during use; and   a working axis along a direction in which a workpiece is moved relative to the abrasive article during use;
 wherein the working axis is substantially perpendicular to the rotation axis; 
 wherein the working surface defines a working angle with respect to the working axis; 
 wherein the finishing surface defines a finishing angle with respect to the working axis; and 
 wherein the finishing angle is less than the working angle. 
   
     
     
         46 . The abrasive article of  claim 45 , wherein the finishing angle is less than about 10% of the working angle. 
     
     
         47 . (canceled) 
     
     
         48 . The abrasive article of  claim 46 , wherein the finishing angle is greater than about 0.5% of the working angle. 
     
     
         49 . (canceled) 
     
     
         50 . The abrasive article of  claim 1 , wherein the finishing surface comprises a finishing grinding depth and the working surface comprises a working grinding depth and wherein the finishing grinding depth is less than the working grinding depth. 
     
     
         51 . The abrasive article of  claim 50 , wherein the finishing grinding depth is less than about 10% of the working grinding depth. 
     
     
         52 . (canceled) 
     
     
         53 . The abrasive article of  claim 51 , wherein the finishing grinding depth is greater than about 1.0% of the working grinding depth. 
     
     
         54 . The abrasive article of  claim 53 , wherein the finishing surface comprises a semi-cylindrical shape. 
     
     
         55 - 91 . (canceled)