Carrier body for a grinding or a cutting tool

Abstract

Carrier body ( 1 ) for a grinding or a cutting tool ( 2 ), comprising a central coupling area ( 3 ) for connecting the grinding or cutting tool ( 2 ) to a rotary drive for rotating the grinding or cutting tool ( 2 ) about an axis of rotation ( 4 ) passing through the coupling area ( 3 ), a carrier structure ( 6 ) adjacent thereto in the radial direction ( 5 ), wherein the carrier structure ( 6 ) has recesses ( 7, 8 ) separate from the coupling area ( 3 ), and two substantially annular side surfaces ( 9, 10 ) which are spaced apart from each other in the axial direction ( 11 ) across the carrier structure ( 6 ), wherein at least some, preferably all, of the recesses ( 7, 8 ) are open only to one of the side surfaces ( 9, 10 ) of the carrier body ( 1 ).

1 . Carrier body ( 1 ) for a grinding or a cutting tool ( 2 ), comprising a central coupling area ( 3 ) for connecting the grinding or cutting tool ( 2 ) to a rotary drive for rotating the grinding or cutting tool ( 2 ) about an axis of rotation ( 4 ) passing through the coupling area ( 3 ), a carrier structure ( 6 ) adjacent thereto in the radial direction ( 5 ), wherein the carrier structure ( 6 ) has recesses ( 7 ,  8 ) separate from the coupling area ( 3 ), and two substantially annular side surfaces ( 9 ,  10 ) which are spaced apart from each other in the axial direction ( 11 ) across the carrier structure ( 6 ), characterized in that at least some, preferably all, of the recesses ( 7 ,  8 ) are open only to one of the side surfaces ( 9 ,  10 ) of the carrier body ( 1 ). 
     
     
         2 . Carrier body ( 1 ) according to  claim 1 , wherein the recesses ( 7 ,  8 ) are open to the same side surface ( 9 ) of the carrier body ( 1 ). 
     
     
         3 . Carrier body ( 1 ) according to  claim 1 , wherein the recesses ( 7 ,  8 ) are sealed on the side surface ( 10 ) which is opposite the side surface ( 9 ), to which the recesses ( 7 ,  8 ) are open, by a side wall ( 12 ) which is connected to the carrier structure ( 6 ) in one piece. 
     
     
         4 . Carrier body ( 1 ) according to  claim 3 , wherein, in the axial direction ( 11 ), the side wall ( 12 ) has a thickness ( 13 ) of from 0.3% to 15%, preferably approx. 10%, of the thickness ( 14 ) of the carrier body ( 1 ). 
     
     
         5 . Carrier body ( 1 ) according to  claim 1 , wherein the recesses ( 7 ,  8 ) are covered on the side surface ( 9 ), to which the recesses ( 7 ,  8 ) are open, by a common, preferably annular, cover ( 15 ). 
     
     
         6 . Carrier body ( 1 ) according to  claim 5 , wherein the cover ( 15 ) occupies a larger portion of the side surface ( 9 ) than the recesses ( 7 ,  8 ), and/or the cover ( 15 ) is bonded to the side surface ( 9 ), to which the recesses ( 7 ,  8 ) are open, preferably wherein there is a bonding at every point at which the cover ( 15 ) contacts the side surface ( 9 ). 
     
     
         7 . Carrier body ( 1 ) according to  claim 5 , wherein the side surface ( 9 ), to which the recesses ( 7 ,  8 ) are open, has a cut-out ( 16 ), which has a shape corresponding to the cover ( 15 ), and the cover ( 15 ) is inserted into the cut-out ( 16 ) substantially without gaps. 
     
     
         8 . Carrier body ( 1 ) according to  claim 5 , wherein, in the axial direction ( 11 ), the cover ( 15 ) has a thickness ( 17 ) of from 0.3% to 15%, preferably approx. 10%, of the thickness ( 14 ) of the carrier body ( 1 ). 
     
     
         9 . Carrier body ( 1 ) according to  claim 1 , wherein the recesses ( 7 ,  8 ) are filled, at least in areas, preferably completely, with a filler material ( 18 ), preferably synthetic resin. 
     
     
         10 . Carrier body ( 1 ) according to  claim 1 , wherein the recesses ( 7 ,  8 ) have a circular or slotted hole-shaped cross section in a cross-sectional plane ( 19 ) normal to the axis of rotation ( 4 ). 
     
     
         11 . Carrier body ( 1 ) according to  claim 1 , wherein the recesses ( 7 ,  8 ) on the side surface ( 9 ), to which the recesses ( 7 ,  8 ) are open, occupy a total area of from 50% to 90%, preferably approx. 75%, of the side surface ( 9 ). 
     
     
         12 . Carrier body ( 1 ) according to  claim 1 , wherein the coupling area ( 3 ) has a central lead-through ( 20 ), and preferably means ( 21 ,  22 ) for the torque-proof connection of the grinding or cutting tool ( 2 ) to the rotary drive, wherein the means ( 21 ,  22 ) for the torque-proof connection are arranged neighbouring the lead-through ( 20 ). 
     
     
         13 . Carrier body ( 1 ) according to  claim 1 , wherein the carrier body ( 1 ) has a diameter ( 23 ) of from 250 mm to 700 mm, preferably approx. 400 mm, and/or a thickness ( 14 ) in the axial direction ( 11 ) of from 20 mm to 300 mm, preferably approx. 30 mm. 
     
     
         14 . Carrier body ( 1 ) according to  claim 1 , wherein the carrier body ( 1 ) is formed asymmetrically relative to a centre plane ( 26 ) normal to the axis of rotation ( 4 ). 
     
     
         15 . Grinding or cutting tool ( 2 ) with a carrier body ( 1 ) according to  claim 1  and an abrasive material ( 24 ) arranged in or on the carrier body ( 1 ), preferably wherein the carrier body ( 1 ) has a peripheral surface ( 25 ) and the abrasive material ( 24 ) is arranged in the form of an abrasive layer on the peripheral surface ( 25 ) of the carrier body ( 1 ).