Polishing tool and apparatus for polishing a workpiece

Abstract

The present invention relates to a polishing tool 10 comprising a holder 11 , a ball 12 received in the holder 11 , and a polishing foil 13 covering all or part of the free surface 12 a of the ball 12.

1 . A polishing tool, comprising:
 a holder,   a ball received in the holder,   a polishing foil covering all or part of the free surface of the ball.   
     
     
         2 . The polishing tool according to  claim 1 , further comprising a receptacle in which the ball is received. 
     
     
         3 . The polishing tool according to  claim 1 , wherein the holder is cast from a plastic. 
     
     
         4 . The polishing tool according to  claim 1 , wherein the ball consists of a rubber material. 
     
     
         5 . The polishing tool according to  claim 1 , wherein the ball has a Shore hardness of at least SH 30 or at most SH 70. 
     
     
         6 . The polishing tool according to  claim 1 , with the polishing foil at least one of having the shape of an unfolded sphere or being formed by a plurality of segments. 
     
     
         7 . The polishing tool according to  claim 6 , wherein the unfolded sphere or the segments is or are cut out of a flat foil. 
     
     
         8 . The polishing tool according to  claim 1 , wherein the polishing foil is attached to the free surface of the ball at least one of stress-free or wrinkle-free. 
     
     
         9 . The polishing tool according to  claim 1 , wherein the holder has a channel opening into the receptacle. 
     
     
         10 . The polishing tool according to  claim 1 , wherein the holder has a first, spherical, region and a second, cylindrical, region. 
     
     
         11 . An apparatus for polishing a workpiece, with a rotatably driven tool spindle and a polishing tool,
 wherein the polishing tool is exchangeably fastened or fastenable to the tool spindle,   wherein the polishing tool comprises a holder, a ball received in the holder and a polishing foil covering all or part of the free surface of the ball.   
     
     
         12 . The polishing tool according to  claim 2 , wherein the ball is received in at least one of a force-fitting or bonding manner. 
     
     
         13 . The polishing tool according to  claim 10 , wherein the diameter of the second region is smaller than the diameter of the ball. 
     
     
         14 . The apparatus according to  claim 11 , further comprising a receptacle in which the ball is received. 
     
     
         15 . The apparatus according to  claim 11 , wherein the holder is cast from a plastic. 
     
     
         16 . The apparatus according to  claim 11 , wherein the ball consists of a rubber material. 
     
     
         17 . The apparatus according to  claim 11 , wherein the ball has a Shore hardness of at least SH 30 or at most SH 70. 
     
     
         18 . The apparatus according to  claim 11 , with the polishing foil at least one of having the shape of an unfolded sphere or being formed by a plurality of segments. 
     
     
         19 . The apparatus according to  claim 11 , wherein the polishing foil is attached to the free surface of the ball at least one of stress-free or wrinkle-free. 
     
     
         20 . The Apparatus according to  claim 11 , wherein the holder has a channel opening into the receptacle.