Apparatus for double-sided grinding

Abstract

A grinding apparatus for machining a workpiece ( 6 ), including an apparatus frame ( 2 ) supporting a grinding station ( 3 ) with a number of grinding heads ( 4 ) with associated grinding elements ( 5 ) arranged such that the grinding elements ( 5 ) are in contact with one surface ( 7 ) of the workpiece at the passage of the workpiece through the grinding apparatus ( 1 ), and an endless conveying means ( 8 ) for the grinding heads ( 4 ), and a roller table ( 9 ) for supporting the workpiece ( 6 ), where the grinding apparatus ( 1 ) includes a further grinding station ( 10 ) with grinding heads ( 4 ) arranged such that the grinding elements ( 5 ) are in contact with the opposite surface ( 11 ) of the workpiece at the passage of the workpiece across the roller table ( 9 ), where the roller table includes a first ( 12 ) and a second set of rollers ( 13 ), and where there is an interspace ( 14 ) between two set of rollers ( 12, 13 ), allowing passage of the workpiece between the two set of rollers ( 12, 13 ), wherein spacing ( 15 ) between individual rollers ( 16 ) in each of the two sets of rollers ( 12, 13 ) is arranged such that a plurality of the rollers ( 16 ) from each of the two sets of rollers ( 12, 13 ) are simultaneously in contact with the opposing surfaces ( 7, 11 ), where a first grinding station ( 3 ) is provided between two succeeding rollers in the first set ( 12 ) and a second grinding station ( 10 ) is provided between two succeeding rollers in the second set ( 13 ).

1 . A grinding apparatus for machining a workpiece ( 6 ), including an apparatus frame ( 2 ) supporting a grinding station ( 3 ) with a number of grinding heads ( 4 ) with associated grinding elements ( 5 ), arranged such that the grinding elements ( 5 ) are in contact with one surface ( 7 ) of the workpiece at the passage of the workpiece through the grinding apparatus ( 1 ), and an endless conveying means ( 8 ) for the grinding heads ( 4 ), and a roller table ( 9 ) for supporting the workpiece ( 6 ), where the grinding apparatus ( 1 ) includes a further grinding station ( 10 ) with grinding heads ( 4 ) arranged such that the grinding elements ( 5 ) are in contact with the opposite surface ( 11 ) of the workpiece at the passage of the workpiece across the roller table ( 9 ), where the roller table includes a first ( 12 ) and a second set of rollers ( 13 ), and where there is an interspace ( 14 ) between the two set of rollers ( 12 ,  13 ), allowing passage of the workpiece between the two set of rollers ( 12  , 13 ), wherein spacing ( 15 ) between individual rollers ( 16 ) in each of the two sets of rollers ( 12 ,  13 ) is arranged such that a plurality of the rollers ( 16 ) from each of the two sets of rollers ( 12 ,  13 ) are simultaneously in contact with the opposing surfaces ( 7 ,  11 ), that a first grinding station ( 3 ) is provided between two succeeding rollers in the first set ( 12 ) and a second grinding station ( 10 ) is provided between two succeeding rollers in the second set ( 13 ), that the two sets of rollers ( 12 ,  13 ) are provided in an arrangement ( 17 ) enabling adaptation of the height of the interspace ( 14 ) between the two sets of rollers ( 12 ,  13 ) and that the height of the interspace ( 14 ) between the two sets of rollers ( 12 ,  13 ) is adjusted by means of actuators ( 18 ). 
     
     
         2 . Grinding apparatus according to  claim 1 , wherein the rollers ( 16 ) in the two sets of rollers ( 12 ,  13 ) are resilient for establishing a squeezing action on the workpiece ( 6 ). 
     
     
         3 . Grinding apparatus according to  claim 1 , wherein the two sets of rollers ( 12 ,  13 ) are disposed in approximately parallel horizontal planes. 
     
     
         4 . Grinding apparatus according to  claim 1 , wherein the rollers ( 16 ) in the two sets of rollers ( 12 ,  13 ) are disposed opposite each other. 
     
     
         5 . Grinding apparatus according to  claim 1 , wherein the rollers ( 16 ) are provided with a drive means ( 19 ) for advancing the workpiece ( 6 ), the drive means optionally being a belt, a toothed belt, a chain or a toothed wheel. 
     
     
         6 . Grinding apparatus according to  claim 1 , wherein that a unit ( 20 ) for sucking grinding dust is provided in connection with each grinding station ( 3 ,  10 ) and at each area where the grinding elements ( 5 ) are in contact with the workpiece ( 6 ). 
     
     
         7 . Grinding apparatus according to  claim 6 , wherein a guide rail ( 21 ) for the workpiece is provided on each suction unit ( 20 ). 
     
     
         8 . Grinding apparatus according to  claim 1 , wherein the grinding stations ( 3 ,  10 ) are provided in an arrangement ( 22 ) that enables adjustment of the height of the grinding elements ( 5 ) in relation to the surface ( 7 ,  11 ) of the workpiece, manually or by actuators ( 23 ). 
     
     
         9 - 10 . (canceled)